From 08fadac81718542d8feedd520fedab9757b4ee96 Mon Sep 17 00:00:00 2001 From: "Dave St.Germain" Date: Fri, 7 Feb 2014 10:15:35 -0500 Subject: [PATCH] Upgrade CodeMirror to 3.21.0 (with accessibility changes from http://bgrins.github.io/codemirror-accessible/) LMS-1802 --- CHANGELOG.rst | 3 + .../features/advanced_settings.py | 13 +- .../contentstore/features/common.py | 22 +- .../contentstore/features/course-updates.py | 10 +- .../contentstore/features/problem-editor.py | 2 +- cms/envs/common.py | 2 +- cms/static/js/views/course_info_helper.js | 5 +- cms/static/js/views/settings/advanced.js | 19 +- cms/static/js/views/settings/main.js | 5 +- cms/static/sass/views/_settings.scss | 10 +- cms/templates/widgets/source-edit.html | 2 +- common/lib/capa/capa/templates/codeinput.html | 14 +- .../js/vendor/CodeMirror/accessible.diff | 72 + .../js/vendor/CodeMirror/addons/closetag.js | 93 + .../js/vendor/CodeMirror/addons/comment.js | 149 + .../js/vendor/CodeMirror/addons/diff.js | 32 + .../CodeMirror/{ => addons}/edx_markdown.js | 0 .../js/vendor/CodeMirror/addons/formatting.js | 114 + .../vendor/CodeMirror/addons/htmlembedded.js | 71 + .../js/vendor/CodeMirror/addons/htmlmixed.js | 102 + .../js/vendor/CodeMirror/addons/javascript.js | 630 ++ .../CodeMirror/addons/match-highlighter.js | 91 + .../js/vendor/CodeMirror/addons/python.js | 374 + .../js/vendor/CodeMirror/addons/search.js | 146 + .../vendor/CodeMirror/addons/searchcursor.js | 167 + .../static/js/vendor/CodeMirror/addons/xml.js | 332 + .../js/vendor/CodeMirror/addons/yaml.js | 97 + .../vendor/CodeMirror/codemirror-3.21.0.css | 263 + .../CodeMirror/codemirror-accessible.js | 5828 ++++++++++++ .../static/js/vendor/CodeMirror/codemirror.js | 8162 +++++++++++------ .../static/js/vendor/codemirror-compressed.js | 455 +- lms/envs/common.py | 2 +- lms/templates/courseware/courseware.html | 6 - 33 files changed, 14228 insertions(+), 3065 deletions(-) create mode 100644 common/static/js/vendor/CodeMirror/accessible.diff create mode 100644 common/static/js/vendor/CodeMirror/addons/closetag.js create mode 100644 common/static/js/vendor/CodeMirror/addons/comment.js create mode 100644 common/static/js/vendor/CodeMirror/addons/diff.js rename common/static/js/vendor/CodeMirror/{ => addons}/edx_markdown.js (100%) create mode 100644 common/static/js/vendor/CodeMirror/addons/formatting.js create mode 100644 common/static/js/vendor/CodeMirror/addons/htmlembedded.js create mode 100644 common/static/js/vendor/CodeMirror/addons/htmlmixed.js create mode 100644 common/static/js/vendor/CodeMirror/addons/javascript.js create mode 100644 common/static/js/vendor/CodeMirror/addons/match-highlighter.js create mode 100644 common/static/js/vendor/CodeMirror/addons/python.js create mode 100644 common/static/js/vendor/CodeMirror/addons/search.js create mode 100644 common/static/js/vendor/CodeMirror/addons/searchcursor.js create mode 100644 common/static/js/vendor/CodeMirror/addons/xml.js create mode 100644 common/static/js/vendor/CodeMirror/addons/yaml.js create mode 100644 common/static/js/vendor/CodeMirror/codemirror-3.21.0.css create mode 100644 common/static/js/vendor/CodeMirror/codemirror-accessible.js diff --git a/CHANGELOG.rst b/CHANGELOG.rst index a8cc6d97ca..691446315a 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -5,6 +5,9 @@ These are notable changes in edx-platform. This is a rolling list of changes, in roughly chronological order, most recent first. Add your entries at or near the top. Include a label indicating the component affected. +Common: Upgraded CodeMirror to 3.21.0 with an accessibility patch applied. + LMS-1802 + Studio: Add new container page that can display nested xblocks. STUD-1244. Blades: Allow multiple transcripts with video. BLD-642. diff --git a/cms/djangoapps/contentstore/features/advanced_settings.py b/cms/djangoapps/contentstore/features/advanced_settings.py index c59e7d5b4b..1d35a9dc11 100644 --- a/cms/djangoapps/contentstore/features/advanced_settings.py +++ b/cms/djangoapps/contentstore/features/advanced_settings.py @@ -3,10 +3,9 @@ from lettuce import world, step from nose.tools import assert_false, assert_equal, assert_regexp_matches # pylint: disable=E0611 -from common import type_in_codemirror, press_the_notification_button +from common import type_in_codemirror, press_the_notification_button, get_codemirror_value KEY_CSS = '.key input.policy-key' -VALUE_CSS = 'textarea.json' DISPLAY_NAME_KEY = "display_name" DISPLAY_NAME_VALUE = '"Robot Super Course"' @@ -101,7 +100,7 @@ def assert_policy_entries(expected_keys, expected_values): for key, value in zip(expected_keys, expected_values): index = get_index_of(key) assert_false(index == -1, "Could not find key: {key}".format(key=key)) - found_value = world.css_find(VALUE_CSS)[index].value + found_value = get_codemirror_value(index) assert_equal( value, found_value, "Expected {} to have value {} but found {}".format(key, value, found_value) @@ -120,15 +119,13 @@ def get_index_of(expected_key): def get_display_name_value(): index = get_index_of(DISPLAY_NAME_KEY) - return world.css_value(VALUE_CSS, index=index) - + return get_codemirror_value(index) def change_display_name_value(step, new_value): change_value(step, DISPLAY_NAME_KEY, new_value) - def change_value(step, key, new_value): - type_in_codemirror(get_index_of(key), new_value) - world.wait(0.5) + index = get_index_of(key) + type_in_codemirror(index, new_value) press_the_notification_button(step, "Save") world.wait_for_ajax_complete() diff --git a/cms/djangoapps/contentstore/features/common.py b/cms/djangoapps/contentstore/features/common.py index 9dc77ca33d..270a395648 100644 --- a/cms/djangoapps/contentstore/features/common.py +++ b/cms/djangoapps/contentstore/features/common.py @@ -319,20 +319,18 @@ def i_am_shown_a_notification(step): def type_in_codemirror(index, text): - world.wait(1) # For now, slow this down so that it works. TODO: fix it. - world.css_click("div.CodeMirror-lines", index=index) - world.browser.execute_script("$('div.CodeMirror.CodeMirror-focused > div').css('overflow', '')") - g = world.css_find("div.CodeMirror.CodeMirror-focused > div > textarea") - if world.is_mac(): - g._element.send_keys(Keys.COMMAND + 'a') - else: - g._element.send_keys(Keys.CONTROL + 'a') - g._element.send_keys(Keys.DELETE) - g._element.send_keys(text) - if world.is_firefox(): - world.trigger_event('div.CodeMirror', index=index, event='blur') + script = """ + var cm = $('div.CodeMirror:eq({})').get(0).CodeMirror; + cm.getInputField().focus(); + cm.setValue(arguments[0]); + cm.getInputField().blur();""".format(index) + world.browser.driver.execute_script(script, str(text)) world.wait_for_ajax_complete() +def get_codemirror_value(index=0): + return world.browser.driver.execute_script(""" + return $('div.CodeMirror:eq({})').get(0).CodeMirror.getValue(); + """.format(index)) def upload_file(filename): path = os.path.join(TEST_ROOT, filename) diff --git a/cms/djangoapps/contentstore/features/course-updates.py b/cms/djangoapps/contentstore/features/course-updates.py index b41578c907..16ca128d01 100644 --- a/cms/djangoapps/contentstore/features/course-updates.py +++ b/cms/djangoapps/contentstore/features/course-updates.py @@ -3,7 +3,7 @@ from lettuce import world, step from selenium.webdriver.common.keys import Keys -from common import type_in_codemirror +from common import type_in_codemirror, get_codemirror_value from nose.tools import assert_in # pylint: disable=E0611 @@ -74,7 +74,7 @@ def change_date(_step, new_date): @step(u'I should see the date "([^"]*)"$') def check_date(_step, date): date_css = 'span.date-display' - assert date == world.css_html(date_css) + assert_in(date, world.css_html(date_css)) @step(u'I modify the handout to "([^"]*)"$') @@ -87,7 +87,7 @@ def edit_handouts(_step, text): @step(u'I see the handout "([^"]*)"$') def check_handout(_step, handout): handout_css = 'div.handouts-content' - assert handout in world.css_html(handout_css) + assert_in(handout, world.css_html(handout_css)) @step(u'I see the handout error text') @@ -127,6 +127,6 @@ def change_text(text): def verify_text_in_editor_and_update(button_css, before, after): world.css_click(button_css) - text = world.css_find(".cm-string").html - assert before in text + text = get_codemirror_value() + assert_in(before, text) change_text(after) diff --git a/cms/djangoapps/contentstore/features/problem-editor.py b/cms/djangoapps/contentstore/features/problem-editor.py index 819382d8fe..05395de7ed 100644 --- a/cms/djangoapps/contentstore/features/problem-editor.py +++ b/cms/djangoapps/contentstore/features/problem-editor.py @@ -173,7 +173,7 @@ def cancel_does_not_save_changes(step): def enable_latex_compiler(step): url = world.browser.url step.given("I select the Advanced Settings") - change_value(step, 'use_latex_compiler', True) + change_value(step, 'use_latex_compiler', 'true') world.visit(url) world.wait_for_xmodule() diff --git a/cms/envs/common.py b/cms/envs/common.py index 902bd59c1e..499070a967 100644 --- a/cms/envs/common.py +++ b/cms/envs/common.py @@ -292,7 +292,7 @@ PIPELINE_CSS = { 'css/vendor/normalize.css', 'css/vendor/font-awesome.css', 'css/vendor/html5-input-polyfills/number-polyfill.css', - 'js/vendor/CodeMirror/codemirror.css', + 'js/vendor/CodeMirror/codemirror-3.21.0.css', 'css/vendor/ui-lightness/jquery-ui-1.8.22.custom.css', 'css/vendor/jquery.qtip.min.css', 'js/vendor/markitup/skins/simple/style.css', diff --git a/cms/static/js/views/course_info_helper.js b/cms/static/js/views/course_info_helper.js index 3b519ec8f2..c9e74c531c 100644 --- a/cms/static/js/views/course_info_helper.js +++ b/cms/static/js/views/course_info_helper.js @@ -7,9 +7,10 @@ define(["codemirror", 'js/utils/handle_iframe_binding', "utility"], mode: "text/html", lineNumbers: true, lineWrapping: true, - onChange: function () { + autoCloseTags: true + }); + $codeMirror.on('change', function () { $('.save-button').removeClass('is-disabled'); - } }); $codeMirror.setValue(content); $codeMirror.clearHistory(); diff --git a/cms/static/js/views/settings/advanced.js b/cms/static/js/views/settings/advanced.js index 84cb488d8e..95a87e2962 100644 --- a/cms/static/js/views/settings/advanced.js +++ b/cms/static/js/views/settings/advanced.js @@ -47,9 +47,11 @@ var AdvancedView = ValidatingView.extend({ var self = this; var oldValue = $(textarea).val(); - CodeMirror.fromTextArea(textarea, { - mode: "application/json", lineNumbers: false, lineWrapping: false, - onChange: function(instance, changeobj) { + var cm = CodeMirror.fromTextArea(textarea, { + mode: "application/json", + lineNumbers: false, + lineWrapping: false}); + cm.on('change', function(instance, changeobj) { instance.save(); // this event's being called even when there's no change :-( if (instance.getValue() !== oldValue) { @@ -58,11 +60,11 @@ var AdvancedView = ValidatingView.extend({ _.bind(self.saveView, self), _.bind(self.revertView, self)); } - }, - onFocus : function(mirror) { + }); + cm.on('focus', function(mirror) { $(textarea).parent().children('label').addClass("is-focused"); - }, - onBlur: function (mirror) { + }); + cm.on('blur', function (mirror) { $(textarea).parent().children('label').removeClass("is-focused"); var key = $(mirror.getWrapperElement()).closest('.field-group').children('.key').attr('id'); var stringValue = $.trim(mirror.getValue()); @@ -91,8 +93,7 @@ var AdvancedView = ValidatingView.extend({ if (JSONValue !== undefined) { self.model.set(key, JSONValue); } - } - }); + }); }, saveView : function() { // TODO one last verification scan: diff --git a/cms/static/js/views/settings/main.js b/cms/static/js/views/settings/main.js index 08aeabb83c..583f42c0c8 100644 --- a/cms/static/js/views/settings/main.js +++ b/cms/static/js/views/settings/main.js @@ -206,15 +206,14 @@ var DetailsView = ValidatingView.extend({ var cachethis = this; var field = this.selectorToField[thisTarget.id]; this.codeMirrors[thisTarget.id] = CodeMirror.fromTextArea(thisTarget, { - mode: "text/html", lineNumbers: true, lineWrapping: true, - onChange: function (mirror) { + mode: "text/html", lineNumbers: true, lineWrapping: true}); + this.codeMirrors[thisTarget.id].on('change', function (mirror) { mirror.save(); cachethis.clearValidationErrors(); var newVal = mirror.getValue(); if (cachethis.model.get(field) != newVal) { cachethis.setAndValidate(field, newVal); } - } }); } }, diff --git a/cms/static/sass/views/_settings.scss b/cms/static/sass/views/_settings.scss index 97eb1f5c78..d735b6238b 100644 --- a/cms/static/sass/views/_settings.scss +++ b/cms/static/sass/views/_settings.scss @@ -831,19 +831,15 @@ font-family: 'Open Sans', sans-serif; color: $baseFontColor; outline: 0; + height: auto; + min-height: ($baseline*2.25); + max-height: ($baseline*10); &.CodeMirror-focused { @include linear-gradient($paleYellow, tint($paleYellow, 90%)); outline: 0; } - .CodeMirror-scroll { - overflow: hidden; - height: auto; - min-height: ($baseline*1.5); - max-height: ($baseline*10); - } - // editor color changes just for JSON .CodeMirror-lines { diff --git a/cms/templates/widgets/source-edit.html b/cms/templates/widgets/source-edit.html index ea63d0a102..fbd7e3f0bc 100644 --- a/cms/templates/widgets/source-edit.html +++ b/cms/templates/widgets/source-edit.html @@ -97,7 +97,7 @@ require(["jquery", "jquery.leanModal", "codemirror/stex"], function($) { }); // resize the codemirror box var h = el.height(); - el.find('.CodeMirror-scroll').height(h - 100); + el.find('.CodeMirror').height(h - 160); } // compile & save button diff --git a/common/lib/capa/capa/templates/codeinput.html b/common/lib/capa/capa/templates/codeinput.html index 08ad4ff062..eb8a83bd1a 100644 --- a/common/lib/capa/capa/templates/codeinput.html +++ b/common/lib/capa/capa/templates/codeinput.html @@ -1,11 +1,16 @@ +<%! from django.utils.translation import ugettext as _ %>
- -
+
% if status == 'unsubmitted': Status: Unanswered % elif status == 'correct': @@ -44,13 +49,16 @@ tabSize: "${tabsize}", indentWithTabs: false, extraKeys: { + "Esc": function(cm) { + $('.grader-status').focus(); + return false; + }, "Tab": function(cm) { cm.replaceSelection("${' '*tabsize}", "end"); } }, smartIndent: false }); - $("#textbox_${id}").find('.CodeMirror-scroll').height(${int(13.5*eval(rows))}); });
diff --git a/common/static/js/vendor/CodeMirror/accessible.diff b/common/static/js/vendor/CodeMirror/accessible.diff new file mode 100644 index 0000000000..e7b48883e9 --- /dev/null +++ b/common/static/js/vendor/CodeMirror/accessible.diff @@ -0,0 +1,72 @@ +diff --git a/codemirror-accessible.js b/codemirror-accessible.js +index 1d0d996..bd37cfb 100644 +--- a/codemirror-accessible.js ++++ b/codemirror-accessible.js +@@ -1443,7 +1443,7 @@ window.CodeMirror = (function() { + // supported or compatible enough yet to rely on.) + function readInput(cm) { + var input = cm.display.input, prevInput = cm.display.prevInput, doc = cm.doc, sel = doc.sel; +- if (!cm.state.focused || hasSelection(input) || isReadOnly(cm) || cm.options.disableInput) return false; ++ if (!cm.state.focused || hasSelection(input) || isReadOnly(cm) || cm.options.disableInput || cm.state.accessibleTextareaWaiting) return false; + var text = input.value; + if (text == prevInput && posEq(sel.from, sel.to)) return false; + if (ie && !ie_lt9 && cm.display.inputHasSelection === text) { +@@ -1480,13 +1480,13 @@ window.CodeMirror = (function() { + var minimal, selected, doc = cm.doc; + if (!posEq(doc.sel.from, doc.sel.to)) { + cm.display.prevInput = ""; +- minimal = hasCopyEvent && ++ minimal = false && hasCopyEvent && + (doc.sel.to.line - doc.sel.from.line > 100 || (selected = cm.getSelection()).length > 1000); + var content = minimal ? "-" : selected || cm.getSelection(); + cm.display.input.value = content; + if (cm.state.focused) selectInput(cm.display.input); + if (ie && !ie_lt9) cm.display.inputHasSelection = content; +- } else if (user) { ++ } else if (user && !cm.state.accessibleTextareaWaiting) { + cm.display.prevInput = cm.display.input.value = ""; + if (ie && !ie_lt9) cm.display.inputHasSelection = null; + } +@@ -2069,6 +2069,12 @@ window.CodeMirror = (function() { + cm.doc.sel.shift = code == 16 || e.shiftKey; + // First give onKeyEvent option a chance to handle this. + var handled = handleKeyBinding(cm, e); ++ ++ // On text input if value was temporaritly set for a screenreader, clear it out. ++ if (!handled && cm.state.accessibleTextareaWaiting) { ++ clearAccessibleTextarea(cm); ++ } ++ + if (opera) { + lastStoppedKey = handled ? code : null; + // Opera has no cut event... we try to at least catch the key combo +@@ -2473,6 +2479,29 @@ window.CodeMirror = (function() { + setSelection(doc, pos, other || pos, bias); + } + if (doc.cm) doc.cm.curOp.userSelChange = true; ++ ++ if (doc.cm) { ++ var from = doc.sel.from; ++ var to = doc.sel.to; ++ ++ if (posEq(from, to) && doc.cm.display.input.setSelectionRange) { ++ clearTimeout(doc.cm.state.accessibleTextareaTimeout); ++ doc.cm.state.accessibleTextareaWaiting = true; ++ ++ doc.cm.display.input.value = doc.getLine(from.line) + "\n"; ++ doc.cm.display.input.setSelectionRange(from.ch, from.ch); ++ ++ doc.cm.state.accessibleTextareaTimeout = setTimeout(function() { ++ clearAccessibleTextarea(doc.cm); ++ }, 80); ++ } ++ } ++ } ++ ++ function clearAccessibleTextarea(cm) { ++ clearTimeout(cm.state.accessibleTextareaTimeout); ++ cm.state.accessibleTextareaWaiting = false; ++ resetInput(cm, true); + } + + function filterSelectionChange(doc, anchor, head) { diff --git a/common/static/js/vendor/CodeMirror/addons/closetag.js b/common/static/js/vendor/CodeMirror/addons/closetag.js new file mode 100644 index 0000000000..cad776a783 --- /dev/null +++ b/common/static/js/vendor/CodeMirror/addons/closetag.js @@ -0,0 +1,93 @@ +/** + * Tag-closer extension for CodeMirror. + * + * This extension adds an "autoCloseTags" option that can be set to + * either true to get the default behavior, or an object to further + * configure its behavior. + * + * These are supported options: + * + * `whenClosing` (default true) + * Whether to autoclose when the '/' of a closing tag is typed. + * `whenOpening` (default true) + * Whether to autoclose the tag when the final '>' of an opening + * tag is typed. + * `dontCloseTags` (default is empty tags for HTML, none for XML) + * An array of tag names that should not be autoclosed. + * `indentTags` (default is block tags for HTML, none for XML) + * An array of tag names that should, when opened, cause a + * blank line to be added inside the tag, and the blank line and + * closing line to be indented. + * + * See demos/closetag.html for a usage example. + */ + +(function() { + CodeMirror.defineOption("autoCloseTags", false, function(cm, val, old) { + if (old != CodeMirror.Init && old) + cm.removeKeyMap("autoCloseTags"); + if (!val) return; + var map = {name: "autoCloseTags"}; + if (typeof val != "object" || val.whenClosing) + map["'/'"] = function(cm) { return autoCloseSlash(cm); }; + if (typeof val != "object" || val.whenOpening) + map["'>'"] = function(cm) { return autoCloseGT(cm); }; + cm.addKeyMap(map); + }); + + var htmlDontClose = ["area", "base", "br", "col", "command", "embed", "hr", "img", "input", "keygen", "link", "meta", "param", + "source", "track", "wbr"]; + var htmlIndent = ["applet", "blockquote", "body", "button", "div", "dl", "fieldset", "form", "frameset", "h1", "h2", "h3", "h4", + "h5", "h6", "head", "html", "iframe", "layer", "legend", "object", "ol", "p", "select", "table", "ul"]; + + function autoCloseGT(cm) { + var pos = cm.getCursor(), tok = cm.getTokenAt(pos); + var inner = CodeMirror.innerMode(cm.getMode(), tok.state), state = inner.state; + if (inner.mode.name != "xml" || !state.tagName || cm.getOption("disableInput")) return CodeMirror.Pass; + + var opt = cm.getOption("autoCloseTags"), html = inner.mode.configuration == "html"; + var dontCloseTags = (typeof opt == "object" && opt.dontCloseTags) || (html && htmlDontClose); + var indentTags = (typeof opt == "object" && opt.indentTags) || (html && htmlIndent); + + var tagName = state.tagName; + if (tok.end > pos.ch) tagName = tagName.slice(0, tagName.length - tok.end + pos.ch); + var lowerTagName = tagName.toLowerCase(); + // Don't process the '>' at the end of an end-tag or self-closing tag + if (!tagName || + tok.type == "string" && (tok.end != pos.ch || !/[\"\']/.test(tok.string.charAt(tok.string.length - 1)) || tok.string.length == 1) || + tok.type == "tag" && state.type == "closeTag" || + tok.string.indexOf("/") == (tok.string.length - 1) || // match something like + dontCloseTags && indexOf(dontCloseTags, lowerTagName) > -1 || + CodeMirror.scanForClosingTag && CodeMirror.scanForClosingTag(cm, pos, tagName, + Math.min(cm.lastLine() + 1, pos.line + 50))) + return CodeMirror.Pass; + + var doIndent = indentTags && indexOf(indentTags, lowerTagName) > -1; + var curPos = doIndent ? CodeMirror.Pos(pos.line + 1, 0) : CodeMirror.Pos(pos.line, pos.ch + 1); + cm.replaceSelection(">" + (doIndent ? "\n\n" : "") + "", + {head: curPos, anchor: curPos}); + if (doIndent) { + cm.indentLine(pos.line + 1, null, true); + cm.indentLine(pos.line + 2, null); + } + } + + function autoCloseSlash(cm) { + var pos = cm.getCursor(), tok = cm.getTokenAt(pos); + var inner = CodeMirror.innerMode(cm.getMode(), tok.state), state = inner.state; + if (tok.type == "string" || tok.string.charAt(0) != "<" || + tok.start != pos.ch - 1 || inner.mode.name != "xml" || + cm.getOption("disableInput")) + return CodeMirror.Pass; + + var tagName = state.context && state.context.tagName; + if (tagName) cm.replaceSelection("/" + tagName + ">", "end"); + } + + function indexOf(collection, elt) { + if (collection.indexOf) return collection.indexOf(elt); + for (var i = 0, e = collection.length; i < e; ++i) + if (collection[i] == elt) return i; + return -1; + } +})(); diff --git a/common/static/js/vendor/CodeMirror/addons/comment.js b/common/static/js/vendor/CodeMirror/addons/comment.js new file mode 100644 index 0000000000..5975b0bf69 --- /dev/null +++ b/common/static/js/vendor/CodeMirror/addons/comment.js @@ -0,0 +1,149 @@ +(function() { + "use strict"; + + var noOptions = {}; + var nonWS = /[^\s\u00a0]/; + var Pos = CodeMirror.Pos; + + function firstNonWS(str) { + var found = str.search(nonWS); + return found == -1 ? 0 : found; + } + + CodeMirror.commands.toggleComment = function(cm) { + var from = cm.getCursor("start"), to = cm.getCursor("end"); + cm.uncomment(from, to) || cm.lineComment(from, to); + }; + + CodeMirror.defineExtension("lineComment", function(from, to, options) { + if (!options) options = noOptions; + var self = this, mode = self.getModeAt(from); + var commentString = options.lineComment || mode.lineComment; + if (!commentString) { + if (options.blockCommentStart || mode.blockCommentStart) { + options.fullLines = true; + self.blockComment(from, to, options); + } + return; + } + var firstLine = self.getLine(from.line); + if (firstLine == null) return; + var end = Math.min(to.ch != 0 || to.line == from.line ? to.line + 1 : to.line, self.lastLine() + 1); + var pad = options.padding == null ? " " : options.padding; + var blankLines = options.commentBlankLines || from.line == to.line; + + self.operation(function() { + if (options.indent) { + var baseString = firstLine.slice(0, firstNonWS(firstLine)); + for (var i = from.line; i < end; ++i) { + var line = self.getLine(i), cut = baseString.length; + if (!blankLines && !nonWS.test(line)) continue; + if (line.slice(0, cut) != baseString) cut = firstNonWS(line); + self.replaceRange(baseString + commentString + pad, Pos(i, 0), Pos(i, cut)); + } + } else { + for (var i = from.line; i < end; ++i) { + if (blankLines || nonWS.test(self.getLine(i))) + self.replaceRange(commentString + pad, Pos(i, 0)); + } + } + }); + }); + + CodeMirror.defineExtension("blockComment", function(from, to, options) { + if (!options) options = noOptions; + var self = this, mode = self.getModeAt(from); + var startString = options.blockCommentStart || mode.blockCommentStart; + var endString = options.blockCommentEnd || mode.blockCommentEnd; + if (!startString || !endString) { + if ((options.lineComment || mode.lineComment) && options.fullLines != false) + self.lineComment(from, to, options); + return; + } + + var end = Math.min(to.line, self.lastLine()); + if (end != from.line && to.ch == 0 && nonWS.test(self.getLine(end))) --end; + + var pad = options.padding == null ? " " : options.padding; + if (from.line > end) return; + + self.operation(function() { + if (options.fullLines != false) { + var lastLineHasText = nonWS.test(self.getLine(end)); + self.replaceRange(pad + endString, Pos(end)); + self.replaceRange(startString + pad, Pos(from.line, 0)); + var lead = options.blockCommentLead || mode.blockCommentLead; + if (lead != null) for (var i = from.line + 1; i <= end; ++i) + if (i != end || lastLineHasText) + self.replaceRange(lead + pad, Pos(i, 0)); + } else { + self.replaceRange(endString, to); + self.replaceRange(startString, from); + } + }); + }); + + CodeMirror.defineExtension("uncomment", function(from, to, options) { + if (!options) options = noOptions; + var self = this, mode = self.getModeAt(from); + var end = Math.min(to.line, self.lastLine()), start = Math.min(from.line, end); + + // Try finding line comments + var lineString = options.lineComment || mode.lineComment, lines = []; + var pad = options.padding == null ? " " : options.padding, didSomething; + lineComment: { + if (!lineString) break lineComment; + for (var i = start; i <= end; ++i) { + var line = self.getLine(i); + var found = line.indexOf(lineString); + if (found > -1 && !/comment/.test(self.getTokenTypeAt(Pos(i, found + 1)))) found = -1; + if (found == -1 && (i != end || i == start) && nonWS.test(line)) break lineComment; + if (found > -1 && nonWS.test(line.slice(0, found))) break lineComment; + lines.push(line); + } + self.operation(function() { + for (var i = start; i <= end; ++i) { + var line = lines[i - start]; + var pos = line.indexOf(lineString), endPos = pos + lineString.length; + if (pos < 0) continue; + if (line.slice(endPos, endPos + pad.length) == pad) endPos += pad.length; + didSomething = true; + self.replaceRange("", Pos(i, pos), Pos(i, endPos)); + } + }); + if (didSomething) return true; + } + + // Try block comments + var startString = options.blockCommentStart || mode.blockCommentStart; + var endString = options.blockCommentEnd || mode.blockCommentEnd; + if (!startString || !endString) return false; + var lead = options.blockCommentLead || mode.blockCommentLead; + var startLine = self.getLine(start), endLine = end == start ? startLine : self.getLine(end); + var open = startLine.indexOf(startString), close = endLine.lastIndexOf(endString); + if (close == -1 && start != end) { + endLine = self.getLine(--end); + close = endLine.lastIndexOf(endString); + } + if (open == -1 || close == -1 || + !/comment/.test(self.getTokenTypeAt(Pos(start, open + 1))) || + !/comment/.test(self.getTokenTypeAt(Pos(end, close + 1)))) + return false; + + self.operation(function() { + self.replaceRange("", Pos(end, close - (pad && endLine.slice(close - pad.length, close) == pad ? pad.length : 0)), + Pos(end, close + endString.length)); + var openEnd = open + startString.length; + if (pad && startLine.slice(openEnd, openEnd + pad.length) == pad) openEnd += pad.length; + self.replaceRange("", Pos(start, open), Pos(start, openEnd)); + if (lead) for (var i = start + 1; i <= end; ++i) { + var line = self.getLine(i), found = line.indexOf(lead); + if (found == -1 || nonWS.test(line.slice(0, found))) continue; + var foundEnd = found + lead.length; + if (pad && line.slice(foundEnd, foundEnd + pad.length) == pad) foundEnd += pad.length; + self.replaceRange("", Pos(i, found), Pos(i, foundEnd)); + } + }); + return true; + }); +})(); diff --git a/common/static/js/vendor/CodeMirror/addons/diff.js b/common/static/js/vendor/CodeMirror/addons/diff.js new file mode 100644 index 0000000000..9a0d90ea55 --- /dev/null +++ b/common/static/js/vendor/CodeMirror/addons/diff.js @@ -0,0 +1,32 @@ +CodeMirror.defineMode("diff", function() { + + var TOKEN_NAMES = { + '+': 'positive', + '-': 'negative', + '@': 'meta' + }; + + return { + token: function(stream) { + var tw_pos = stream.string.search(/[\t ]+?$/); + + if (!stream.sol() || tw_pos === 0) { + stream.skipToEnd(); + return ("error " + ( + TOKEN_NAMES[stream.string.charAt(0)] || '')).replace(/ $/, ''); + } + + var token_name = TOKEN_NAMES[stream.peek()] || stream.skipToEnd(); + + if (tw_pos === -1) { + stream.skipToEnd(); + } else { + stream.pos = tw_pos; + } + + return token_name; + } + }; +}); + +CodeMirror.defineMIME("text/x-diff", "diff"); diff --git a/common/static/js/vendor/CodeMirror/edx_markdown.js b/common/static/js/vendor/CodeMirror/addons/edx_markdown.js similarity index 100% rename from common/static/js/vendor/CodeMirror/edx_markdown.js rename to common/static/js/vendor/CodeMirror/addons/edx_markdown.js diff --git a/common/static/js/vendor/CodeMirror/addons/formatting.js b/common/static/js/vendor/CodeMirror/addons/formatting.js new file mode 100644 index 0000000000..88b84307f6 --- /dev/null +++ b/common/static/js/vendor/CodeMirror/addons/formatting.js @@ -0,0 +1,114 @@ +(function() { + + CodeMirror.extendMode("css", { + commentStart: "/*", + commentEnd: "*/", + newlineAfterToken: function(_type, content) { + return /^[;{}]$/.test(content); + } + }); + + CodeMirror.extendMode("javascript", { + commentStart: "/*", + commentEnd: "*/", + // FIXME semicolons inside of for + newlineAfterToken: function(_type, content, textAfter, state) { + if (this.jsonMode) { + return /^[\[,{]$/.test(content) || /^}/.test(textAfter); + } else { + if (content == ";" && state.lexical && state.lexical.type == ")") return false; + return /^[;{}]$/.test(content) && !/^;/.test(textAfter); + } + } + }); + + var inlineElements = /^(a|abbr|acronym|area|base|bdo|big|br|button|caption|cite|code|col|colgroup|dd|del|dfn|em|frame|hr|iframe|img|input|ins|kbd|label|legend|link|map|object|optgroup|option|param|q|samp|script|select|small|span|strong|sub|sup|textarea|tt|var)$/; + + CodeMirror.extendMode("xml", { + commentStart: "", + newlineAfterToken: function(type, content, textAfter, state) { + var inline = false; + if (this.configuration == "html") + inline = state.context ? inlineElements.test(state.context.tagName) : false; + return !inline && ((type == "tag" && />$/.test(content) && state.context) || + /^ -1 && endIndex > -1 && endIndex > startIndex) { + // Take string till comment start + selText = selText.substr(0, startIndex) + // From comment start till comment end + + selText.substring(startIndex + curMode.commentStart.length, endIndex) + // From comment end till string end + + selText.substr(endIndex + curMode.commentEnd.length); + } + cm.replaceRange(selText, from, to); + } + }); + }); + + // Applies automatic mode-aware indentation to the specified range + CodeMirror.defineExtension("autoIndentRange", function (from, to) { + var cmInstance = this; + this.operation(function () { + for (var i = from.line; i <= to.line; i++) { + cmInstance.indentLine(i, "smart"); + } + }); + }); + + // Applies automatic formatting to the specified range + CodeMirror.defineExtension("autoFormatRange", function (from, to) { + var cm = this; + var outer = cm.getMode(), text = cm.getRange(from, to).split("\n"); + var state = CodeMirror.copyState(outer, cm.getTokenAt(from).state); + var tabSize = cm.getOption("tabSize"); + + var out = "", lines = 0, atSol = from.ch == 0; + function newline() { + out += "\n"; + atSol = true; + ++lines; + } + + for (var i = 0; i < text.length; ++i) { + var stream = new CodeMirror.StringStream(text[i], tabSize); + while (!stream.eol()) { + var inner = CodeMirror.innerMode(outer, state); + var style = outer.token(stream, state), cur = stream.current(); + stream.start = stream.pos; + if (!atSol || /\S/.test(cur)) { + out += cur; + atSol = false; + } + if (!atSol && inner.mode.newlineAfterToken && + inner.mode.newlineAfterToken(style, cur, stream.string.slice(stream.pos) || text[i+1] || "", inner.state)) + newline(); + } + if (!stream.pos && outer.blankLine) outer.blankLine(state); + if (!atSol && i < text.length - 1) newline(); + } + + cm.operation(function () { + cm.replaceRange(out, from, to); + for (var cur = from.line + 1, end = from.line + lines; cur <= end; ++cur) + cm.indentLine(cur, "smart"); + cm.setSelection(from, cm.getCursor(false)); + }); + }); +})(); diff --git a/common/static/js/vendor/CodeMirror/addons/htmlembedded.js b/common/static/js/vendor/CodeMirror/addons/htmlembedded.js new file mode 100644 index 0000000000..c316cd3406 --- /dev/null +++ b/common/static/js/vendor/CodeMirror/addons/htmlembedded.js @@ -0,0 +1,71 @@ +CodeMirror.defineMode("htmlembedded", function(config, parserConfig) { + + //config settings + var scriptStartRegex = parserConfig.scriptStartRegex || /^<%/i, + scriptEndRegex = parserConfig.scriptEndRegex || /^%>/i; + + //inner modes + var scriptingMode, htmlMixedMode; + + //tokenizer when in html mode + function htmlDispatch(stream, state) { + if (stream.match(scriptStartRegex, false)) { + state.token=scriptingDispatch; + return scriptingMode.token(stream, state.scriptState); + } + else + return htmlMixedMode.token(stream, state.htmlState); + } + + //tokenizer when in scripting mode + function scriptingDispatch(stream, state) { + if (stream.match(scriptEndRegex, false)) { + state.token=htmlDispatch; + return htmlMixedMode.token(stream, state.htmlState); + } + else + return scriptingMode.token(stream, state.scriptState); + } + + + return { + startState: function() { + scriptingMode = scriptingMode || CodeMirror.getMode(config, parserConfig.scriptingModeSpec); + htmlMixedMode = htmlMixedMode || CodeMirror.getMode(config, "htmlmixed"); + return { + token : parserConfig.startOpen ? scriptingDispatch : htmlDispatch, + htmlState : CodeMirror.startState(htmlMixedMode), + scriptState : CodeMirror.startState(scriptingMode) + }; + }, + + token: function(stream, state) { + return state.token(stream, state); + }, + + indent: function(state, textAfter) { + if (state.token == htmlDispatch) + return htmlMixedMode.indent(state.htmlState, textAfter); + else if (scriptingMode.indent) + return scriptingMode.indent(state.scriptState, textAfter); + }, + + copyState: function(state) { + return { + token : state.token, + htmlState : CodeMirror.copyState(htmlMixedMode, state.htmlState), + scriptState : CodeMirror.copyState(scriptingMode, state.scriptState) + }; + }, + + innerMode: function(state) { + if (state.token == scriptingDispatch) return {state: state.scriptState, mode: scriptingMode}; + else return {state: state.htmlState, mode: htmlMixedMode}; + } + }; +}, "htmlmixed"); + +CodeMirror.defineMIME("application/x-ejs", { name: "htmlembedded", scriptingModeSpec:"javascript"}); +CodeMirror.defineMIME("application/x-aspx", { name: "htmlembedded", scriptingModeSpec:"text/x-csharp"}); +CodeMirror.defineMIME("application/x-jsp", { name: "htmlembedded", scriptingModeSpec:"text/x-java"}); +CodeMirror.defineMIME("application/x-erb", { name: "htmlembedded", scriptingModeSpec:"ruby"}); diff --git a/common/static/js/vendor/CodeMirror/addons/htmlmixed.js b/common/static/js/vendor/CodeMirror/addons/htmlmixed.js new file mode 100644 index 0000000000..e9eab3b92d --- /dev/null +++ b/common/static/js/vendor/CodeMirror/addons/htmlmixed.js @@ -0,0 +1,102 @@ +CodeMirror.defineMode("htmlmixed", function(config, parserConfig) { + var htmlMode = CodeMirror.getMode(config, {name: "xml", htmlMode: true}); + var cssMode = CodeMirror.getMode(config, "css"); + + var scriptTypes = [], scriptTypesConf = parserConfig && parserConfig.scriptTypes; + scriptTypes.push({matches: /^(?:text|application)\/(?:x-)?(?:java|ecma)script$|^$/i, + mode: CodeMirror.getMode(config, "javascript")}); + if (scriptTypesConf) for (var i = 0; i < scriptTypesConf.length; ++i) { + var conf = scriptTypesConf[i]; + scriptTypes.push({matches: conf.matches, mode: conf.mode && CodeMirror.getMode(config, conf.mode)}); + } + scriptTypes.push({matches: /./, + mode: CodeMirror.getMode(config, "text/plain")}); + + function html(stream, state) { + var tagName = state.htmlState.tagName; + var style = htmlMode.token(stream, state.htmlState); + if (tagName == "script" && /\btag\b/.test(style) && stream.current() == ">") { + // Script block: mode to change to depends on type attribute + var scriptType = stream.string.slice(Math.max(0, stream.pos - 100), stream.pos).match(/\btype\s*=\s*("[^"]+"|'[^']+'|\S+)[^<]*$/i); + scriptType = scriptType ? scriptType[1] : ""; + if (scriptType && /[\"\']/.test(scriptType.charAt(0))) scriptType = scriptType.slice(1, scriptType.length - 1); + for (var i = 0; i < scriptTypes.length; ++i) { + var tp = scriptTypes[i]; + if (typeof tp.matches == "string" ? scriptType == tp.matches : tp.matches.test(scriptType)) { + if (tp.mode) { + state.token = script; + state.localMode = tp.mode; + state.localState = tp.mode.startState && tp.mode.startState(htmlMode.indent(state.htmlState, "")); + } + break; + } + } + } else if (tagName == "style" && /\btag\b/.test(style) && stream.current() == ">") { + state.token = css; + state.localMode = cssMode; + state.localState = cssMode.startState(htmlMode.indent(state.htmlState, "")); + } + return style; + } + function maybeBackup(stream, pat, style) { + var cur = stream.current(); + var close = cur.search(pat), m; + if (close > -1) stream.backUp(cur.length - close); + else if (m = cur.match(/<\/?$/)) { + stream.backUp(cur.length); + if (!stream.match(pat, false)) stream.match(cur); + } + return style; + } + function script(stream, state) { + if (stream.match(/^<\/\s*script\s*>/i, false)) { + state.token = html; + state.localState = state.localMode = null; + return html(stream, state); + } + return maybeBackup(stream, /<\/\s*script\s*>/, + state.localMode.token(stream, state.localState)); + } + function css(stream, state) { + if (stream.match(/^<\/\s*style\s*>/i, false)) { + state.token = html; + state.localState = state.localMode = null; + return html(stream, state); + } + return maybeBackup(stream, /<\/\s*style\s*>/, + cssMode.token(stream, state.localState)); + } + + return { + startState: function() { + var state = htmlMode.startState(); + return {token: html, localMode: null, localState: null, htmlState: state}; + }, + + copyState: function(state) { + if (state.localState) + var local = CodeMirror.copyState(state.localMode, state.localState); + return {token: state.token, localMode: state.localMode, localState: local, + htmlState: CodeMirror.copyState(htmlMode, state.htmlState)}; + }, + + token: function(stream, state) { + return state.token(stream, state); + }, + + indent: function(state, textAfter) { + if (!state.localMode || /^\s*<\//.test(textAfter)) + return htmlMode.indent(state.htmlState, textAfter); + else if (state.localMode.indent) + return state.localMode.indent(state.localState, textAfter); + else + return CodeMirror.Pass; + }, + + innerMode: function(state) { + return {state: state.localState || state.htmlState, mode: state.localMode || htmlMode}; + } + }; +}, "xml", "javascript", "css"); + +CodeMirror.defineMIME("text/html", "htmlmixed"); diff --git a/common/static/js/vendor/CodeMirror/addons/javascript.js b/common/static/js/vendor/CodeMirror/addons/javascript.js new file mode 100644 index 0000000000..fbf574b4fe --- /dev/null +++ b/common/static/js/vendor/CodeMirror/addons/javascript.js @@ -0,0 +1,630 @@ +// TODO actually recognize syntax of TypeScript constructs + +CodeMirror.defineMode("javascript", function(config, parserConfig) { + var indentUnit = config.indentUnit; + var statementIndent = parserConfig.statementIndent; + var jsonMode = parserConfig.json; + var isTS = parserConfig.typescript; + + // Tokenizer + + var keywords = function(){ + function kw(type) {return {type: type, style: "keyword"};} + var A = kw("keyword a"), B = kw("keyword b"), C = kw("keyword c"); + var operator = kw("operator"), atom = {type: "atom", style: "atom"}; + + var jsKeywords = { + "if": kw("if"), "while": A, "with": A, "else": B, "do": B, "try": B, "finally": B, + "return": C, "break": C, "continue": C, "new": C, "delete": C, "throw": C, "debugger": C, + "var": kw("var"), "const": kw("var"), "let": kw("var"), + "function": kw("function"), "catch": kw("catch"), + "for": kw("for"), "switch": kw("switch"), "case": kw("case"), "default": kw("default"), + "in": operator, "typeof": operator, "instanceof": operator, + "true": atom, "false": atom, "null": atom, "undefined": atom, "NaN": atom, "Infinity": atom, + "this": kw("this"), "module": kw("module"), "class": kw("class"), "super": kw("atom"), + "yield": C, "export": kw("export"), "import": kw("import"), "extends": C + }; + + // Extend the 'normal' keywords with the TypeScript language extensions + if (isTS) { + var type = {type: "variable", style: "variable-3"}; + var tsKeywords = { + // object-like things + "interface": kw("interface"), + "extends": kw("extends"), + "constructor": kw("constructor"), + + // scope modifiers + "public": kw("public"), + "private": kw("private"), + "protected": kw("protected"), + "static": kw("static"), + + // types + "string": type, "number": type, "bool": type, "any": type + }; + + for (var attr in tsKeywords) { + jsKeywords[attr] = tsKeywords[attr]; + } + } + + return jsKeywords; + }(); + + var isOperatorChar = /[+\-*&%=<>!?|~^]/; + + function readRegexp(stream) { + var escaped = false, next, inSet = false; + while ((next = stream.next()) != null) { + if (!escaped) { + if (next == "/" && !inSet) return; + if (next == "[") inSet = true; + else if (inSet && next == "]") inSet = false; + } + escaped = !escaped && next == "\\"; + } + } + + // Used as scratch variables to communicate multiple values without + // consing up tons of objects. + var type, content; + function ret(tp, style, cont) { + type = tp; content = cont; + return style; + } + function tokenBase(stream, state) { + var ch = stream.next(); + if (ch == '"' || ch == "'") { + state.tokenize = tokenString(ch); + return state.tokenize(stream, state); + } else if (ch == "." && stream.match(/^\d+(?:[eE][+\-]?\d+)?/)) { + return ret("number", "number"); + } else if (ch == "." && stream.match("..")) { + return ret("spread", "meta"); + } else if (/[\[\]{}\(\),;\:\.]/.test(ch)) { + return ret(ch); + } else if (ch == "=" && stream.eat(">")) { + return ret("=>", "operator"); + } else if (ch == "0" && stream.eat(/x/i)) { + stream.eatWhile(/[\da-f]/i); + return ret("number", "number"); + } else if (/\d/.test(ch)) { + stream.match(/^\d*(?:\.\d*)?(?:[eE][+\-]?\d+)?/); + return ret("number", "number"); + } else if (ch == "/") { + if (stream.eat("*")) { + state.tokenize = tokenComment; + return tokenComment(stream, state); + } else if (stream.eat("/")) { + stream.skipToEnd(); + return ret("comment", "comment"); + } else if (state.lastType == "operator" || state.lastType == "keyword c" || + state.lastType == "sof" || /^[\[{}\(,;:]$/.test(state.lastType)) { + readRegexp(stream); + stream.eatWhile(/[gimy]/); // 'y' is "sticky" option in Mozilla + return ret("regexp", "string-2"); + } else { + stream.eatWhile(isOperatorChar); + return ret("operator", "operator", stream.current()); + } + } else if (ch == "`") { + state.tokenize = tokenQuasi; + return tokenQuasi(stream, state); + } else if (ch == "#") { + stream.skipToEnd(); + return ret("error", "error"); + } else if (isOperatorChar.test(ch)) { + stream.eatWhile(isOperatorChar); + return ret("operator", "operator", stream.current()); + } else { + stream.eatWhile(/[\w\$_]/); + var word = stream.current(), known = keywords.propertyIsEnumerable(word) && keywords[word]; + return (known && state.lastType != ".") ? ret(known.type, known.style, word) : + ret("variable", "variable", word); + } + } + + function tokenString(quote) { + return function(stream, state) { + var escaped = false, next; + while ((next = stream.next()) != null) { + if (next == quote && !escaped) break; + escaped = !escaped && next == "\\"; + } + if (!escaped) state.tokenize = tokenBase; + return ret("string", "string"); + }; + } + + function tokenComment(stream, state) { + var maybeEnd = false, ch; + while (ch = stream.next()) { + if (ch == "/" && maybeEnd) { + state.tokenize = tokenBase; + break; + } + maybeEnd = (ch == "*"); + } + return ret("comment", "comment"); + } + + function tokenQuasi(stream, state) { + var escaped = false, next; + while ((next = stream.next()) != null) { + if (!escaped && (next == "`" || next == "$" && stream.eat("{"))) { + state.tokenize = tokenBase; + break; + } + escaped = !escaped && next == "\\"; + } + return ret("quasi", "string-2", stream.current()); + } + + var brackets = "([{}])"; + // This is a crude lookahead trick to try and notice that we're + // parsing the argument patterns for a fat-arrow function before we + // actually hit the arrow token. It only works if the arrow is on + // the same line as the arguments and there's no strange noise + // (comments) in between. Fallback is to only notice when we hit the + // arrow, and not declare the arguments as locals for the arrow + // body. + function findFatArrow(stream, state) { + if (state.fatArrowAt) state.fatArrowAt = null; + var arrow = stream.string.indexOf("=>", stream.start); + if (arrow < 0) return; + + var depth = 0, sawSomething = false; + for (var pos = arrow - 1; pos >= 0; --pos) { + var ch = stream.string.charAt(pos); + var bracket = brackets.indexOf(ch); + if (bracket >= 0 && bracket < 3) { + if (!depth) { ++pos; break; } + if (--depth == 0) break; + } else if (bracket >= 3 && bracket < 6) { + ++depth; + } else if (/[$\w]/.test(ch)) { + sawSomething = true; + } else if (sawSomething && !depth) { + ++pos; + break; + } + } + if (sawSomething && !depth) state.fatArrowAt = pos; + } + + // Parser + + var atomicTypes = {"atom": true, "number": true, "variable": true, "string": true, "regexp": true, "this": true}; + + function JSLexical(indented, column, type, align, prev, info) { + this.indented = indented; + this.column = column; + this.type = type; + this.prev = prev; + this.info = info; + if (align != null) this.align = align; + } + + function inScope(state, varname) { + for (var v = state.localVars; v; v = v.next) + if (v.name == varname) return true; + for (var cx = state.context; cx; cx = cx.prev) { + for (var v = cx.vars; v; v = v.next) + if (v.name == varname) return true; + } + } + + function parseJS(state, style, type, content, stream) { + var cc = state.cc; + // Communicate our context to the combinators. + // (Less wasteful than consing up a hundred closures on every call.) + cx.state = state; cx.stream = stream; cx.marked = null, cx.cc = cc; + + if (!state.lexical.hasOwnProperty("align")) + state.lexical.align = true; + + while(true) { + var combinator = cc.length ? cc.pop() : jsonMode ? expression : statement; + if (combinator(type, content)) { + while(cc.length && cc[cc.length - 1].lex) + cc.pop()(); + if (cx.marked) return cx.marked; + if (type == "variable" && inScope(state, content)) return "variable-2"; + return style; + } + } + } + + // Combinator utils + + var cx = {state: null, column: null, marked: null, cc: null}; + function pass() { + for (var i = arguments.length - 1; i >= 0; i--) cx.cc.push(arguments[i]); + } + function cont() { + pass.apply(null, arguments); + return true; + } + function register(varname) { + function inList(list) { + for (var v = list; v; v = v.next) + if (v.name == varname) return true; + return false; + } + var state = cx.state; + if (state.context) { + cx.marked = "def"; + if (inList(state.localVars)) return; + state.localVars = {name: varname, next: state.localVars}; + } else { + if (inList(state.globalVars)) return; + if (parserConfig.globalVars) + state.globalVars = {name: varname, next: state.globalVars}; + } + } + + // Combinators + + var defaultVars = {name: "this", next: {name: "arguments"}}; + function pushcontext() { + cx.state.context = {prev: cx.state.context, vars: cx.state.localVars}; + cx.state.localVars = defaultVars; + } + function popcontext() { + cx.state.localVars = cx.state.context.vars; + cx.state.context = cx.state.context.prev; + } + function pushlex(type, info) { + var result = function() { + var state = cx.state, indent = state.indented; + if (state.lexical.type == "stat") indent = state.lexical.indented; + state.lexical = new JSLexical(indent, cx.stream.column(), type, null, state.lexical, info); + }; + result.lex = true; + return result; + } + function poplex() { + var state = cx.state; + if (state.lexical.prev) { + if (state.lexical.type == ")") + state.indented = state.lexical.indented; + state.lexical = state.lexical.prev; + } + } + poplex.lex = true; + + function expect(wanted) { + return function(type) { + if (type == wanted) return cont(); + else if (wanted == ";") return pass(); + else return cont(arguments.callee); + }; + } + + function statement(type, value) { + if (type == "var") return cont(pushlex("vardef", value.length), vardef, expect(";"), poplex); + if (type == "keyword a") return cont(pushlex("form"), expression, statement, poplex); + if (type == "keyword b") return cont(pushlex("form"), statement, poplex); + if (type == "{") return cont(pushlex("}"), block, poplex); + if (type == ";") return cont(); + if (type == "if") return cont(pushlex("form"), expression, statement, poplex, maybeelse); + if (type == "function") return cont(functiondef); + if (type == "for") return cont(pushlex("form"), forspec, statement, poplex); + if (type == "variable") return cont(pushlex("stat"), maybelabel); + if (type == "switch") return cont(pushlex("form"), expression, pushlex("}", "switch"), expect("{"), + block, poplex, poplex); + if (type == "case") return cont(expression, expect(":")); + if (type == "default") return cont(expect(":")); + if (type == "catch") return cont(pushlex("form"), pushcontext, expect("("), funarg, expect(")"), + statement, poplex, popcontext); + if (type == "module") return cont(pushlex("form"), pushcontext, afterModule, popcontext, poplex); + if (type == "class") return cont(pushlex("form"), className, objlit, poplex); + if (type == "export") return cont(pushlex("form"), afterExport, poplex); + if (type == "import") return cont(pushlex("form"), afterImport, poplex); + return pass(pushlex("stat"), expression, expect(";"), poplex); + } + function expression(type) { + return expressionInner(type, false); + } + function expressionNoComma(type) { + return expressionInner(type, true); + } + function expressionInner(type, noComma) { + if (cx.state.fatArrowAt == cx.stream.start) { + var body = noComma ? arrowBodyNoComma : arrowBody; + if (type == "(") return cont(pushcontext, pushlex(")"), commasep(pattern, ")"), poplex, expect("=>"), body, popcontext); + else if (type == "variable") return pass(pushcontext, pattern, expect("=>"), body, popcontext); + } + + var maybeop = noComma ? maybeoperatorNoComma : maybeoperatorComma; + if (atomicTypes.hasOwnProperty(type)) return cont(maybeop); + if (type == "function") return cont(functiondef); + if (type == "keyword c") return cont(noComma ? maybeexpressionNoComma : maybeexpression); + if (type == "(") return cont(pushlex(")"), maybeexpression, comprehension, expect(")"), poplex, maybeop); + if (type == "operator" || type == "spread") return cont(noComma ? expressionNoComma : expression); + if (type == "[") return cont(pushlex("]"), arrayLiteral, poplex, maybeop); + if (type == "{") return contCommasep(objprop, "}", null, maybeop); + return cont(); + } + function maybeexpression(type) { + if (type.match(/[;\}\)\],]/)) return pass(); + return pass(expression); + } + function maybeexpressionNoComma(type) { + if (type.match(/[;\}\)\],]/)) return pass(); + return pass(expressionNoComma); + } + + function maybeoperatorComma(type, value) { + if (type == ",") return cont(expression); + return maybeoperatorNoComma(type, value, false); + } + function maybeoperatorNoComma(type, value, noComma) { + var me = noComma == false ? maybeoperatorComma : maybeoperatorNoComma; + var expr = noComma == false ? expression : expressionNoComma; + if (value == "=>") return cont(pushcontext, noComma ? arrowBodyNoComma : arrowBody, popcontext); + if (type == "operator") { + if (/\+\+|--/.test(value)) return cont(me); + if (value == "?") return cont(expression, expect(":"), expr); + return cont(expr); + } + if (type == "quasi") { cx.cc.push(me); return quasi(value); } + if (type == ";") return; + if (type == "(") return contCommasep(expressionNoComma, ")", "call", me); + if (type == ".") return cont(property, me); + if (type == "[") return cont(pushlex("]"), maybeexpression, expect("]"), poplex, me); + } + function quasi(value) { + if (value.slice(value.length - 2) != "${") return cont(); + return cont(expression, continueQuasi); + } + function continueQuasi(type) { + if (type == "}") { + cx.marked = "string-2"; + cx.state.tokenize = tokenQuasi; + return cont(); + } + } + function arrowBody(type) { + findFatArrow(cx.stream, cx.state); + if (type == "{") return pass(statement); + return pass(expression); + } + function arrowBodyNoComma(type) { + findFatArrow(cx.stream, cx.state); + if (type == "{") return pass(statement); + return pass(expressionNoComma); + } + function maybelabel(type) { + if (type == ":") return cont(poplex, statement); + return pass(maybeoperatorComma, expect(";"), poplex); + } + function property(type) { + if (type == "variable") {cx.marked = "property"; return cont();} + } + function objprop(type, value) { + if (type == "variable") { + cx.marked = "property"; + if (value == "get" || value == "set") return cont(getterSetter); + } else if (type == "number" || type == "string") { + cx.marked = type + " property"; + } else if (type == "[") { + return cont(expression, expect("]"), afterprop); + } + if (atomicTypes.hasOwnProperty(type)) return cont(afterprop); + } + function getterSetter(type) { + if (type != "variable") return pass(afterprop); + cx.marked = "property"; + return cont(functiondef); + } + function afterprop(type) { + if (type == ":") return cont(expressionNoComma); + if (type == "(") return pass(functiondef); + } + function commasep(what, end) { + function proceed(type) { + if (type == ",") { + var lex = cx.state.lexical; + if (lex.info == "call") lex.pos = (lex.pos || 0) + 1; + return cont(what, proceed); + } + if (type == end) return cont(); + return cont(expect(end)); + } + return function(type) { + if (type == end) return cont(); + return pass(what, proceed); + }; + } + function contCommasep(what, end, info) { + for (var i = 3; i < arguments.length; i++) + cx.cc.push(arguments[i]); + return cont(pushlex(end, info), commasep(what, end), poplex); + } + function block(type) { + if (type == "}") return cont(); + return pass(statement, block); + } + function maybetype(type) { + if (isTS && type == ":") return cont(typedef); + } + function typedef(type) { + if (type == "variable"){cx.marked = "variable-3"; return cont();} + } + function vardef() { + return pass(pattern, maybetype, maybeAssign, vardefCont); + } + function pattern(type, value) { + if (type == "variable") { register(value); return cont(); } + if (type == "[") return contCommasep(pattern, "]"); + if (type == "{") return contCommasep(proppattern, "}"); + } + function proppattern(type, value) { + if (type == "variable" && !cx.stream.match(/^\s*:/, false)) { + register(value); + return cont(maybeAssign); + } + if (type == "variable") cx.marked = "property"; + return cont(expect(":"), pattern, maybeAssign); + } + function maybeAssign(_type, value) { + if (value == "=") return cont(expressionNoComma); + } + function vardefCont(type) { + if (type == ",") return cont(vardef); + } + function maybeelse(type, value) { + if (type == "keyword b" && value == "else") return cont(pushlex("form"), statement, poplex); + } + function forspec(type) { + if (type == "(") return cont(pushlex(")"), forspec1, expect(")"), poplex); + } + function forspec1(type) { + if (type == "var") return cont(vardef, expect(";"), forspec2); + if (type == ";") return cont(forspec2); + if (type == "variable") return cont(formaybeinof); + return pass(expression, expect(";"), forspec2); + } + function formaybeinof(_type, value) { + if (value == "in" || value == "of") { cx.marked = "keyword"; return cont(expression); } + return cont(maybeoperatorComma, forspec2); + } + function forspec2(type, value) { + if (type == ";") return cont(forspec3); + if (value == "in" || value == "of") { cx.marked = "keyword"; return cont(expression); } + return pass(expression, expect(";"), forspec3); + } + function forspec3(type) { + if (type != ")") cont(expression); + } + function functiondef(type, value) { + if (value == "*") {cx.marked = "keyword"; return cont(functiondef);} + if (type == "variable") {register(value); return cont(functiondef);} + if (type == "(") return cont(pushcontext, pushlex(")"), commasep(funarg, ")"), poplex, statement, popcontext); + } + function funarg(type) { + if (type == "spread") return cont(funarg); + return pass(pattern, maybetype); + } + function className(type, value) { + if (type == "variable") {register(value); return cont(classNameAfter);} + } + function classNameAfter(_type, value) { + if (value == "extends") return cont(expression); + } + function objlit(type) { + if (type == "{") return contCommasep(objprop, "}"); + } + function afterModule(type, value) { + if (type == "string") return cont(statement); + if (type == "variable") { register(value); return cont(maybeFrom); } + } + function afterExport(_type, value) { + if (value == "*") { cx.marked = "keyword"; return cont(maybeFrom, expect(";")); } + if (value == "default") { cx.marked = "keyword"; return cont(expression, expect(";")); } + return pass(statement); + } + function afterImport(type) { + if (type == "string") return cont(); + return pass(importSpec, maybeFrom); + } + function importSpec(type, value) { + if (type == "{") return contCommasep(importSpec, "}"); + if (type == "variable") register(value); + return cont(); + } + function maybeFrom(_type, value) { + if (value == "from") { cx.marked = "keyword"; return cont(expression); } + } + function arrayLiteral(type) { + if (type == "]") return cont(); + return pass(expressionNoComma, maybeArrayComprehension); + } + function maybeArrayComprehension(type) { + if (type == "for") return pass(comprehension, expect("]")); + if (type == ",") return cont(commasep(expressionNoComma, "]")); + return pass(commasep(expressionNoComma, "]")); + } + function comprehension(type) { + if (type == "for") return cont(forspec, comprehension); + if (type == "if") return cont(expression, comprehension); + } + + // Interface + + return { + startState: function(basecolumn) { + var state = { + tokenize: tokenBase, + lastType: "sof", + cc: [], + lexical: new JSLexical((basecolumn || 0) - indentUnit, 0, "block", false), + localVars: parserConfig.localVars, + context: parserConfig.localVars && {vars: parserConfig.localVars}, + indented: 0 + }; + if (parserConfig.globalVars) state.globalVars = parserConfig.globalVars; + return state; + }, + + token: function(stream, state) { + if (stream.sol()) { + if (!state.lexical.hasOwnProperty("align")) + state.lexical.align = false; + state.indented = stream.indentation(); + findFatArrow(stream, state); + } + if (state.tokenize != tokenComment && stream.eatSpace()) return null; + var style = state.tokenize(stream, state); + if (type == "comment") return style; + state.lastType = type == "operator" && (content == "++" || content == "--") ? "incdec" : type; + return parseJS(state, style, type, content, stream); + }, + + indent: function(state, textAfter) { + if (state.tokenize == tokenComment) return CodeMirror.Pass; + if (state.tokenize != tokenBase) return 0; + var firstChar = textAfter && textAfter.charAt(0), lexical = state.lexical; + // Kludge to prevent 'maybelse' from blocking lexical scope pops + for (var i = state.cc.length - 1; i >= 0; --i) { + var c = state.cc[i]; + if (c == poplex) lexical = lexical.prev; + else if (c != maybeelse) break; + } + if (lexical.type == "stat" && firstChar == "}") lexical = lexical.prev; + if (statementIndent && lexical.type == ")" && lexical.prev.type == "stat") + lexical = lexical.prev; + var type = lexical.type, closing = firstChar == type; + + if (type == "vardef") return lexical.indented + (state.lastType == "operator" || state.lastType == "," ? lexical.info + 1 : 0); + else if (type == "form" && firstChar == "{") return lexical.indented; + else if (type == "form") return lexical.indented + indentUnit; + else if (type == "stat") + return lexical.indented + (state.lastType == "operator" || state.lastType == "," ? statementIndent || indentUnit : 0); + else if (lexical.info == "switch" && !closing && parserConfig.doubleIndentSwitch != false) + return lexical.indented + (/^(?:case|default)\b/.test(textAfter) ? indentUnit : 2 * indentUnit); + else if (lexical.align) return lexical.column + (closing ? 0 : 1); + else return lexical.indented + (closing ? 0 : indentUnit); + }, + + electricChars: ":{}", + blockCommentStart: jsonMode ? null : "/*", + blockCommentEnd: jsonMode ? null : "*/", + lineComment: jsonMode ? null : "//", + fold: "brace", + + helperType: jsonMode ? "json" : "javascript", + jsonMode: jsonMode + }; +}); + +CodeMirror.defineMIME("text/javascript", "javascript"); +CodeMirror.defineMIME("text/ecmascript", "javascript"); +CodeMirror.defineMIME("application/javascript", "javascript"); +CodeMirror.defineMIME("application/ecmascript", "javascript"); +CodeMirror.defineMIME("application/json", {name: "javascript", json: true}); +CodeMirror.defineMIME("application/x-json", {name: "javascript", json: true}); +CodeMirror.defineMIME("text/typescript", { name: "javascript", typescript: true }); +CodeMirror.defineMIME("application/typescript", { name: "javascript", typescript: true }); diff --git a/common/static/js/vendor/CodeMirror/addons/match-highlighter.js b/common/static/js/vendor/CodeMirror/addons/match-highlighter.js new file mode 100644 index 0000000000..e5cbeacab2 --- /dev/null +++ b/common/static/js/vendor/CodeMirror/addons/match-highlighter.js @@ -0,0 +1,91 @@ +// Highlighting text that matches the selection +// +// Defines an option highlightSelectionMatches, which, when enabled, +// will style strings that match the selection throughout the +// document. +// +// The option can be set to true to simply enable it, or to a +// {minChars, style, showToken} object to explicitly configure it. +// minChars is the minimum amount of characters that should be +// selected for the behavior to occur, and style is the token style to +// apply to the matches. This will be prefixed by "cm-" to create an +// actual CSS class name. showToken, when enabled, will cause the +// current token to be highlighted when nothing is selected. + +(function() { + var DEFAULT_MIN_CHARS = 2; + var DEFAULT_TOKEN_STYLE = "matchhighlight"; + var DEFAULT_DELAY = 100; + + function State(options) { + if (typeof options == "object") { + this.minChars = options.minChars; + this.style = options.style; + this.showToken = options.showToken; + this.delay = options.delay; + } + if (this.style == null) this.style = DEFAULT_TOKEN_STYLE; + if (this.minChars == null) this.minChars = DEFAULT_MIN_CHARS; + if (this.delay == null) this.delay = DEFAULT_DELAY; + this.overlay = this.timeout = null; + } + + CodeMirror.defineOption("highlightSelectionMatches", false, function(cm, val, old) { + if (old && old != CodeMirror.Init) { + var over = cm.state.matchHighlighter.overlay; + if (over) cm.removeOverlay(over); + clearTimeout(cm.state.matchHighlighter.timeout); + cm.state.matchHighlighter = null; + cm.off("cursorActivity", cursorActivity); + } + if (val) { + cm.state.matchHighlighter = new State(val); + highlightMatches(cm); + cm.on("cursorActivity", cursorActivity); + } + }); + + function cursorActivity(cm) { + var state = cm.state.matchHighlighter; + clearTimeout(state.timeout); + state.timeout = setTimeout(function() {highlightMatches(cm);}, state.delay); + } + + function highlightMatches(cm) { + cm.operation(function() { + var state = cm.state.matchHighlighter; + if (state.overlay) { + cm.removeOverlay(state.overlay); + state.overlay = null; + } + if (!cm.somethingSelected() && state.showToken) { + var re = state.showToken === true ? /[\w$]/ : state.showToken; + var cur = cm.getCursor(), line = cm.getLine(cur.line), start = cur.ch, end = start; + while (start && re.test(line.charAt(start - 1))) --start; + while (end < line.length && re.test(line.charAt(end))) ++end; + if (start < end) + cm.addOverlay(state.overlay = makeOverlay(line.slice(start, end), re, state.style)); + return; + } + if (cm.getCursor("head").line != cm.getCursor("anchor").line) return; + var selection = cm.getSelection().replace(/^\s+|\s+$/g, ""); + if (selection.length >= state.minChars) + cm.addOverlay(state.overlay = makeOverlay(selection, false, state.style)); + }); + } + + function boundariesAround(stream, re) { + return (!stream.start || !re.test(stream.string.charAt(stream.start - 1))) && + (stream.pos == stream.string.length || !re.test(stream.string.charAt(stream.pos))); + } + + function makeOverlay(query, hasBoundary, style) { + return {token: function(stream) { + if (stream.match(query) && + (!hasBoundary || boundariesAround(stream, hasBoundary))) + return style; + stream.next(); + stream.skipTo(query.charAt(0)) || stream.skipToEnd(); + }}; + } +})(); diff --git a/common/static/js/vendor/CodeMirror/addons/python.js b/common/static/js/vendor/CodeMirror/addons/python.js new file mode 100644 index 0000000000..8bea5d19d1 --- /dev/null +++ b/common/static/js/vendor/CodeMirror/addons/python.js @@ -0,0 +1,374 @@ +CodeMirror.defineMode("python", function(conf, parserConf) { + var ERRORCLASS = 'error'; + + function wordRegexp(words) { + return new RegExp("^((" + words.join(")|(") + "))\\b"); + } + + var singleOperators = parserConf.singleOperators || new RegExp("^[\\+\\-\\*/%&|\\^~<>!]"); + var singleDelimiters = parserConf.singleDelimiters || new RegExp('^[\\(\\)\\[\\]\\{\\}@,:`=;\\.]'); + var doubleOperators = parserConf.doubleOperators || new RegExp("^((==)|(!=)|(<=)|(>=)|(<>)|(<<)|(>>)|(//)|(\\*\\*))"); + var doubleDelimiters = parserConf.doubleDelimiters || new RegExp("^((\\+=)|(\\-=)|(\\*=)|(%=)|(/=)|(&=)|(\\|=)|(\\^=))"); + var tripleDelimiters = parserConf.tripleDelimiters || new RegExp("^((//=)|(>>=)|(<<=)|(\\*\\*=))"); + var identifiers = parserConf.identifiers|| new RegExp("^[_A-Za-z][_A-Za-z0-9]*"); + var hangingIndent = parserConf.hangingIndent || parserConf.indentUnit; + + var wordOperators = wordRegexp(['and', 'or', 'not', 'is', 'in']); + var commonkeywords = ['as', 'assert', 'break', 'class', 'continue', + 'def', 'del', 'elif', 'else', 'except', 'finally', + 'for', 'from', 'global', 'if', 'import', + 'lambda', 'pass', 'raise', 'return', + 'try', 'while', 'with', 'yield']; + var commonBuiltins = ['abs', 'all', 'any', 'bin', 'bool', 'bytearray', 'callable', 'chr', + 'classmethod', 'compile', 'complex', 'delattr', 'dict', 'dir', 'divmod', + 'enumerate', 'eval', 'filter', 'float', 'format', 'frozenset', + 'getattr', 'globals', 'hasattr', 'hash', 'help', 'hex', 'id', + 'input', 'int', 'isinstance', 'issubclass', 'iter', 'len', + 'list', 'locals', 'map', 'max', 'memoryview', 'min', 'next', + 'object', 'oct', 'open', 'ord', 'pow', 'property', 'range', + 'repr', 'reversed', 'round', 'set', 'setattr', 'slice', + 'sorted', 'staticmethod', 'str', 'sum', 'super', 'tuple', + 'type', 'vars', 'zip', '__import__', 'NotImplemented', + 'Ellipsis', '__debug__']; + var py2 = {'builtins': ['apply', 'basestring', 'buffer', 'cmp', 'coerce', 'execfile', + 'file', 'intern', 'long', 'raw_input', 'reduce', 'reload', + 'unichr', 'unicode', 'xrange', 'False', 'True', 'None'], + 'keywords': ['exec', 'print']}; + var py3 = {'builtins': ['ascii', 'bytes', 'exec', 'print'], + 'keywords': ['nonlocal', 'False', 'True', 'None']}; + + if(parserConf.extra_keywords != undefined){ + commonkeywords = commonkeywords.concat(parserConf.extra_keywords); + } + if(parserConf.extra_builtins != undefined){ + commonBuiltins = commonBuiltins.concat(parserConf.extra_builtins); + } + if (!!parserConf.version && parseInt(parserConf.version, 10) === 3) { + commonkeywords = commonkeywords.concat(py3.keywords); + commonBuiltins = commonBuiltins.concat(py3.builtins); + var stringPrefixes = new RegExp("^(([rb]|(br))?('{3}|\"{3}|['\"]))", "i"); + } else { + commonkeywords = commonkeywords.concat(py2.keywords); + commonBuiltins = commonBuiltins.concat(py2.builtins); + var stringPrefixes = new RegExp("^(([rub]|(ur)|(br))?('{3}|\"{3}|['\"]))", "i"); + } + var keywords = wordRegexp(commonkeywords); + var builtins = wordRegexp(commonBuiltins); + + var indentInfo = null; + + // tokenizers + function tokenBase(stream, state) { + // Handle scope changes + if (stream.sol()) { + var scopeOffset = state.scopes[0].offset; + if (stream.eatSpace()) { + var lineOffset = stream.indentation(); + if (lineOffset > scopeOffset) { + indentInfo = 'indent'; + } else if (lineOffset < scopeOffset) { + indentInfo = 'dedent'; + } + return null; + } else { + if (scopeOffset > 0) { + dedent(stream, state); + } + } + } + if (stream.eatSpace()) { + return null; + } + + var ch = stream.peek(); + + // Handle Comments + if (ch === '#') { + stream.skipToEnd(); + return 'comment'; + } + + // Handle Number Literals + if (stream.match(/^[0-9\.]/, false)) { + var floatLiteral = false; + // Floats + if (stream.match(/^\d*\.\d+(e[\+\-]?\d+)?/i)) { floatLiteral = true; } + if (stream.match(/^\d+\.\d*/)) { floatLiteral = true; } + if (stream.match(/^\.\d+/)) { floatLiteral = true; } + if (floatLiteral) { + // Float literals may be "imaginary" + stream.eat(/J/i); + return 'number'; + } + // Integers + var intLiteral = false; + // Hex + if (stream.match(/^0x[0-9a-f]+/i)) { intLiteral = true; } + // Binary + if (stream.match(/^0b[01]+/i)) { intLiteral = true; } + // Octal + if (stream.match(/^0o[0-7]+/i)) { intLiteral = true; } + // Decimal + if (stream.match(/^[1-9]\d*(e[\+\-]?\d+)?/)) { + // Decimal literals may be "imaginary" + stream.eat(/J/i); + // TODO - Can you have imaginary longs? + intLiteral = true; + } + // Zero by itself with no other piece of number. + if (stream.match(/^0(?![\dx])/i)) { intLiteral = true; } + if (intLiteral) { + // Integer literals may be "long" + stream.eat(/L/i); + return 'number'; + } + } + + // Handle Strings + if (stream.match(stringPrefixes)) { + state.tokenize = tokenStringFactory(stream.current()); + return state.tokenize(stream, state); + } + + // Handle operators and Delimiters + if (stream.match(tripleDelimiters) || stream.match(doubleDelimiters)) { + return null; + } + if (stream.match(doubleOperators) + || stream.match(singleOperators) + || stream.match(wordOperators)) { + return 'operator'; + } + if (stream.match(singleDelimiters)) { + return null; + } + + if (stream.match(keywords)) { + return 'keyword'; + } + + if (stream.match(builtins)) { + return 'builtin'; + } + + if (stream.match(identifiers)) { + if (state.lastToken == 'def' || state.lastToken == 'class') { + return 'def'; + } + return 'variable'; + } + + // Handle non-detected items + stream.next(); + return ERRORCLASS; + } + + function tokenStringFactory(delimiter) { + while ('rub'.indexOf(delimiter.charAt(0).toLowerCase()) >= 0) { + delimiter = delimiter.substr(1); + } + var singleline = delimiter.length == 1; + var OUTCLASS = 'string'; + + function tokenString(stream, state) { + while (!stream.eol()) { + stream.eatWhile(/[^'"\\]/); + if (stream.eat('\\')) { + stream.next(); + if (singleline && stream.eol()) { + return OUTCLASS; + } + } else if (stream.match(delimiter)) { + state.tokenize = tokenBase; + return OUTCLASS; + } else { + stream.eat(/['"]/); + } + } + if (singleline) { + if (parserConf.singleLineStringErrors) { + return ERRORCLASS; + } else { + state.tokenize = tokenBase; + } + } + return OUTCLASS; + } + tokenString.isString = true; + return tokenString; + } + + function indent(stream, state, type) { + type = type || 'py'; + var indentUnit = 0; + if (type === 'py') { + if (state.scopes[0].type !== 'py') { + state.scopes[0].offset = stream.indentation(); + return; + } + for (var i = 0; i < state.scopes.length; ++i) { + if (state.scopes[i].type === 'py') { + indentUnit = state.scopes[i].offset + conf.indentUnit; + break; + } + } + } else if (stream.match(/\s*($|#)/, false)) { + // An open paren/bracket/brace with only space or comments after it + // on the line will indent the next line a fixed amount, to make it + // easier to put arguments, list items, etc. on their own lines. + indentUnit = stream.indentation() + hangingIndent; + } else { + indentUnit = stream.column() + stream.current().length; + } + state.scopes.unshift({ + offset: indentUnit, + type: type + }); + } + + function dedent(stream, state, type) { + type = type || 'py'; + if (state.scopes.length == 1) return; + if (state.scopes[0].type === 'py') { + var _indent = stream.indentation(); + var _indent_index = -1; + for (var i = 0; i < state.scopes.length; ++i) { + if (_indent === state.scopes[i].offset) { + _indent_index = i; + break; + } + } + if (_indent_index === -1) { + return true; + } + while (state.scopes[0].offset !== _indent) { + state.scopes.shift(); + } + return false; + } else { + if (type === 'py') { + state.scopes[0].offset = stream.indentation(); + return false; + } else { + if (state.scopes[0].type != type) { + return true; + } + state.scopes.shift(); + return false; + } + } + } + + function tokenLexer(stream, state) { + indentInfo = null; + var style = state.tokenize(stream, state); + var current = stream.current(); + + // Handle '.' connected identifiers + if (current === '.') { + style = stream.match(identifiers, false) ? null : ERRORCLASS; + if (style === null && state.lastStyle === 'meta') { + // Apply 'meta' style to '.' connected identifiers when + // appropriate. + style = 'meta'; + } + return style; + } + + // Handle decorators + if (current === '@') { + return stream.match(identifiers, false) ? 'meta' : ERRORCLASS; + } + + if ((style === 'variable' || style === 'builtin') + && state.lastStyle === 'meta') { + style = 'meta'; + } + + // Handle scope changes. + if (current === 'pass' || current === 'return') { + state.dedent += 1; + } + if (current === 'lambda') state.lambda = true; + if ((current === ':' && !state.lambda && state.scopes[0].type == 'py') + || indentInfo === 'indent') { + indent(stream, state); + } + var delimiter_index = '[({'.indexOf(current); + if (delimiter_index !== -1) { + indent(stream, state, '])}'.slice(delimiter_index, delimiter_index+1)); + } + if (indentInfo === 'dedent') { + if (dedent(stream, state)) { + return ERRORCLASS; + } + } + delimiter_index = '])}'.indexOf(current); + if (delimiter_index !== -1) { + if (dedent(stream, state, current)) { + return ERRORCLASS; + } + } + if (state.dedent > 0 && stream.eol() && state.scopes[0].type == 'py') { + if (state.scopes.length > 1) state.scopes.shift(); + state.dedent -= 1; + } + + return style; + } + + var external = { + startState: function(basecolumn) { + return { + tokenize: tokenBase, + scopes: [{offset:basecolumn || 0, type:'py'}], + lastStyle: null, + lastToken: null, + lambda: false, + dedent: 0 + }; + }, + + token: function(stream, state) { + var style = tokenLexer(stream, state); + + state.lastStyle = style; + + var current = stream.current(); + if (current && style) { + state.lastToken = current; + } + + if (stream.eol() && state.lambda) { + state.lambda = false; + } + return style; + }, + + indent: function(state) { + if (state.tokenize != tokenBase) { + return state.tokenize.isString ? CodeMirror.Pass : 0; + } + + return state.scopes[0].offset; + }, + + lineComment: "#", + fold: "indent" + }; + return external; +}); + +CodeMirror.defineMIME("text/x-python", "python"); + +(function() { + "use strict"; + var words = function(str){return str.split(' ');}; + + CodeMirror.defineMIME("text/x-cython", { + name: "python", + extra_keywords: words("by cdef cimport cpdef ctypedef enum except"+ + "extern gil include nogil property public"+ + "readonly struct union DEF IF ELIF ELSE") + }); +})(); diff --git a/common/static/js/vendor/CodeMirror/addons/search.js b/common/static/js/vendor/CodeMirror/addons/search.js new file mode 100644 index 0000000000..049f72f3dc --- /dev/null +++ b/common/static/js/vendor/CodeMirror/addons/search.js @@ -0,0 +1,146 @@ +// Define search commands. Depends on dialog.js or another +// implementation of the openDialog method. + +// Replace works a little oddly -- it will do the replace on the next +// Ctrl-G (or whatever is bound to findNext) press. You prevent a +// replace by making sure the match is no longer selected when hitting +// Ctrl-G. + +(function() { + function searchOverlay(query, caseInsensitive) { + var startChar; + if (typeof query == "string") { + startChar = query.charAt(0); + query = new RegExp("^" + query.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&"), + caseInsensitive ? "i" : ""); + } else { + query = new RegExp("^(?:" + query.source + ")", query.ignoreCase ? "i" : ""); + } + if (typeof query == "string") return {token: function(stream) { + if (stream.match(query)) return "searching"; + stream.next(); + stream.skipTo(query.charAt(0)) || stream.skipToEnd(); + }}; + return {token: function(stream) { + if (stream.match(query)) return "searching"; + while (!stream.eol()) { + stream.next(); + if (startChar) + stream.skipTo(startChar) || stream.skipToEnd(); + if (stream.match(query, false)) break; + } + }}; + } + + function SearchState() { + this.posFrom = this.posTo = this.query = null; + this.overlay = null; + } + function getSearchState(cm) { + return cm.state.search || (cm.state.search = new SearchState()); + } + function queryCaseInsensitive(query) { + return typeof query == "string" && query == query.toLowerCase(); + } + function getSearchCursor(cm, query, pos) { + // Heuristic: if the query string is all lowercase, do a case insensitive search. + return cm.getSearchCursor(query, pos, queryCaseInsensitive(query)); + } + function dialog(cm, text, shortText, deflt, f) { + if (cm.openDialog) cm.openDialog(text, f, {value: deflt}); + else f(prompt(shortText, deflt)); + } + function confirmDialog(cm, text, shortText, fs) { + if (cm.openConfirm) cm.openConfirm(text, fs); + else if (confirm(shortText)) fs[0](); + } + function parseQuery(query) { + var isRE = query.match(/^\/(.*)\/([a-z]*)$/); + return isRE ? new RegExp(isRE[1], isRE[2].indexOf("i") == -1 ? "" : "i") : query; + } + var queryDialog = + 'Search: (Use /re/ syntax for regexp search)'; + function doSearch(cm, rev) { + var state = getSearchState(cm); + if (state.query) return findNext(cm, rev); + dialog(cm, queryDialog, "Search for:", cm.getSelection(), function(query) { + cm.operation(function() { + if (!query || state.query) return; + state.query = parseQuery(query); + cm.removeOverlay(state.overlay, queryCaseInsensitive(state.query)); + state.overlay = searchOverlay(state.query); + cm.addOverlay(state.overlay); + state.posFrom = state.posTo = cm.getCursor(); + findNext(cm, rev); + }); + }); + } + function findNext(cm, rev) {cm.operation(function() { + var state = getSearchState(cm); + var cursor = getSearchCursor(cm, state.query, rev ? state.posFrom : state.posTo); + if (!cursor.find(rev)) { + cursor = getSearchCursor(cm, state.query, rev ? CodeMirror.Pos(cm.lastLine()) : CodeMirror.Pos(cm.firstLine(), 0)); + if (!cursor.find(rev)) return; + } + cm.setSelection(cursor.from(), cursor.to()); + cm.scrollIntoView({from: cursor.from(), to: cursor.to()}); + state.posFrom = cursor.from(); state.posTo = cursor.to(); + });} + function clearSearch(cm) {cm.operation(function() { + var state = getSearchState(cm); + if (!state.query) return; + state.query = null; + cm.removeOverlay(state.overlay); + });} + + var replaceQueryDialog = + 'Replace: (Use /re/ syntax for regexp search)'; + var replacementQueryDialog = 'With: '; + var doReplaceConfirm = "Replace? "; + function replace(cm, all) { + dialog(cm, replaceQueryDialog, "Replace:", cm.getSelection(), function(query) { + if (!query) return; + query = parseQuery(query); + dialog(cm, replacementQueryDialog, "Replace with:", "", function(text) { + if (all) { + cm.operation(function() { + for (var cursor = getSearchCursor(cm, query); cursor.findNext();) { + if (typeof query != "string") { + var match = cm.getRange(cursor.from(), cursor.to()).match(query); + cursor.replace(text.replace(/\$(\d)/, function(_, i) {return match[i];})); + } else cursor.replace(text); + } + }); + } else { + clearSearch(cm); + var cursor = getSearchCursor(cm, query, cm.getCursor()); + var advance = function() { + var start = cursor.from(), match; + if (!(match = cursor.findNext())) { + cursor = getSearchCursor(cm, query); + if (!(match = cursor.findNext()) || + (start && cursor.from().line == start.line && cursor.from().ch == start.ch)) return; + } + cm.setSelection(cursor.from(), cursor.to()); + cm.scrollIntoView({from: cursor.from(), to: cursor.to()}); + confirmDialog(cm, doReplaceConfirm, "Replace?", + [function() {doReplace(match);}, advance]); + }; + var doReplace = function(match) { + cursor.replace(typeof query == "string" ? text : + text.replace(/\$(\d)/, function(_, i) {return match[i];})); + advance(); + }; + advance(); + } + }); + }); + } + + CodeMirror.commands.find = function(cm) {clearSearch(cm); doSearch(cm);}; + CodeMirror.commands.findNext = doSearch; + CodeMirror.commands.findPrev = function(cm) {doSearch(cm, true);}; + CodeMirror.commands.clearSearch = clearSearch; + CodeMirror.commands.replace = replace; + CodeMirror.commands.replaceAll = function(cm) {replace(cm, true);}; +})(); diff --git a/common/static/js/vendor/CodeMirror/addons/searchcursor.js b/common/static/js/vendor/CodeMirror/addons/searchcursor.js new file mode 100644 index 0000000000..711cf4ce5a --- /dev/null +++ b/common/static/js/vendor/CodeMirror/addons/searchcursor.js @@ -0,0 +1,167 @@ +(function(){ + var Pos = CodeMirror.Pos; + + function SearchCursor(doc, query, pos, caseFold) { + this.atOccurrence = false; this.doc = doc; + if (caseFold == null && typeof query == "string") caseFold = false; + + pos = pos ? doc.clipPos(pos) : Pos(0, 0); + this.pos = {from: pos, to: pos}; + + // The matches method is filled in based on the type of query. + // It takes a position and a direction, and returns an object + // describing the next occurrence of the query, or null if no + // more matches were found. + if (typeof query != "string") { // Regexp match + if (!query.global) query = new RegExp(query.source, query.ignoreCase ? "ig" : "g"); + this.matches = function(reverse, pos) { + if (reverse) { + query.lastIndex = 0; + var line = doc.getLine(pos.line).slice(0, pos.ch), cutOff = 0, match, start; + for (;;) { + query.lastIndex = cutOff; + var newMatch = query.exec(line); + if (!newMatch) break; + match = newMatch; + start = match.index; + cutOff = match.index + (match[0].length || 1); + if (cutOff == line.length) break; + } + var matchLen = (match && match[0].length) || 0; + if (!matchLen) { + if (start == 0 && line.length == 0) {match = undefined;} + else if (start != doc.getLine(pos.line).length) { + matchLen++; + } + } + } else { + query.lastIndex = pos.ch; + var line = doc.getLine(pos.line), match = query.exec(line); + var matchLen = (match && match[0].length) || 0; + var start = match && match.index; + if (start + matchLen != line.length && !matchLen) matchLen = 1; + } + if (match && matchLen) + return {from: Pos(pos.line, start), + to: Pos(pos.line, start + matchLen), + match: match}; + }; + } else { // String query + var origQuery = query; + if (caseFold) query = query.toLowerCase(); + var fold = caseFold ? function(str){return str.toLowerCase();} : function(str){return str;}; + var target = query.split("\n"); + // Different methods for single-line and multi-line queries + if (target.length == 1) { + if (!query.length) { + // Empty string would match anything and never progress, so + // we define it to match nothing instead. + this.matches = function() {}; + } else { + this.matches = function(reverse, pos) { + if (reverse) { + var orig = doc.getLine(pos.line).slice(0, pos.ch), line = fold(orig); + var match = line.lastIndexOf(query); + if (match > -1) { + match = adjustPos(orig, line, match); + return {from: Pos(pos.line, match), to: Pos(pos.line, match + origQuery.length)}; + } + } else { + var orig = doc.getLine(pos.line).slice(pos.ch), line = fold(orig); + var match = line.indexOf(query); + if (match > -1) { + match = adjustPos(orig, line, match) + pos.ch; + return {from: Pos(pos.line, match), to: Pos(pos.line, match + origQuery.length)}; + } + } + }; + } + } else { + var origTarget = origQuery.split("\n"); + this.matches = function(reverse, pos) { + var last = target.length - 1; + if (reverse) { + if (pos.line - (target.length - 1) < doc.firstLine()) return; + if (fold(doc.getLine(pos.line).slice(0, origTarget[last].length)) != target[target.length - 1]) return; + var to = Pos(pos.line, origTarget[last].length); + for (var ln = pos.line - 1, i = last - 1; i >= 1; --i, --ln) + if (target[i] != fold(doc.getLine(ln))) return; + var line = doc.getLine(ln), cut = line.length - origTarget[0].length; + if (fold(line.slice(cut)) != target[0]) return; + return {from: Pos(ln, cut), to: to}; + } else { + if (pos.line + (target.length - 1) > doc.lastLine()) return; + var line = doc.getLine(pos.line), cut = line.length - origTarget[0].length; + if (fold(line.slice(cut)) != target[0]) return; + var from = Pos(pos.line, cut); + for (var ln = pos.line + 1, i = 1; i < last; ++i, ++ln) + if (target[i] != fold(doc.getLine(ln))) return; + if (doc.getLine(ln).slice(0, origTarget[last].length) != target[last]) return; + return {from: from, to: Pos(ln, origTarget[last].length)}; + } + }; + } + } + } + + SearchCursor.prototype = { + findNext: function() {return this.find(false);}, + findPrevious: function() {return this.find(true);}, + + find: function(reverse) { + var self = this, pos = this.doc.clipPos(reverse ? this.pos.from : this.pos.to); + function savePosAndFail(line) { + var pos = Pos(line, 0); + self.pos = {from: pos, to: pos}; + self.atOccurrence = false; + return false; + } + + for (;;) { + if (this.pos = this.matches(reverse, pos)) { + this.atOccurrence = true; + return this.pos.match || true; + } + if (reverse) { + if (!pos.line) return savePosAndFail(0); + pos = Pos(pos.line-1, this.doc.getLine(pos.line-1).length); + } + else { + var maxLine = this.doc.lineCount(); + if (pos.line == maxLine - 1) return savePosAndFail(maxLine); + pos = Pos(pos.line + 1, 0); + } + } + }, + + from: function() {if (this.atOccurrence) return this.pos.from;}, + to: function() {if (this.atOccurrence) return this.pos.to;}, + + replace: function(newText) { + if (!this.atOccurrence) return; + var lines = CodeMirror.splitLines(newText); + this.doc.replaceRange(lines, this.pos.from, this.pos.to); + this.pos.to = Pos(this.pos.from.line + lines.length - 1, + lines[lines.length - 1].length + (lines.length == 1 ? this.pos.from.ch : 0)); + } + }; + + // Maps a position in a case-folded line back to a position in the original line + // (compensating for codepoints increasing in number during folding) + function adjustPos(orig, folded, pos) { + if (orig.length == folded.length) return pos; + for (var pos1 = Math.min(pos, orig.length);;) { + var len1 = orig.slice(0, pos1).toLowerCase().length; + if (len1 < pos) ++pos1; + else if (len1 > pos) --pos1; + else return pos1; + } + } + + CodeMirror.defineExtension("getSearchCursor", function(query, pos, caseFold) { + return new SearchCursor(this.doc, query, pos, caseFold); + }); + CodeMirror.defineDocExtension("getSearchCursor", function(query, pos, caseFold) { + return new SearchCursor(this, query, pos, caseFold); + }); +})(); diff --git a/common/static/js/vendor/CodeMirror/addons/xml.js b/common/static/js/vendor/CodeMirror/addons/xml.js new file mode 100644 index 0000000000..96b51ff970 --- /dev/null +++ b/common/static/js/vendor/CodeMirror/addons/xml.js @@ -0,0 +1,332 @@ +CodeMirror.defineMode("xml", function(config, parserConfig) { + var indentUnit = config.indentUnit; + var multilineTagIndentFactor = parserConfig.multilineTagIndentFactor || 1; + var multilineTagIndentPastTag = parserConfig.multilineTagIndentPastTag || true; + + var Kludges = parserConfig.htmlMode ? { + autoSelfClosers: {'area': true, 'base': true, 'br': true, 'col': true, 'command': true, + 'embed': true, 'frame': true, 'hr': true, 'img': true, 'input': true, + 'keygen': true, 'link': true, 'meta': true, 'param': true, 'source': true, + 'track': true, 'wbr': true}, + implicitlyClosed: {'dd': true, 'li': true, 'optgroup': true, 'option': true, 'p': true, + 'rp': true, 'rt': true, 'tbody': true, 'td': true, 'tfoot': true, + 'th': true, 'tr': true}, + contextGrabbers: { + 'dd': {'dd': true, 'dt': true}, + 'dt': {'dd': true, 'dt': true}, + 'li': {'li': true}, + 'option': {'option': true, 'optgroup': true}, + 'optgroup': {'optgroup': true}, + 'p': {'address': true, 'article': true, 'aside': true, 'blockquote': true, 'dir': true, + 'div': true, 'dl': true, 'fieldset': true, 'footer': true, 'form': true, + 'h1': true, 'h2': true, 'h3': true, 'h4': true, 'h5': true, 'h6': true, + 'header': true, 'hgroup': true, 'hr': true, 'menu': true, 'nav': true, 'ol': true, + 'p': true, 'pre': true, 'section': true, 'table': true, 'ul': true}, + 'rp': {'rp': true, 'rt': true}, + 'rt': {'rp': true, 'rt': true}, + 'tbody': {'tbody': true, 'tfoot': true}, + 'td': {'td': true, 'th': true}, + 'tfoot': {'tbody': true}, + 'th': {'td': true, 'th': true}, + 'thead': {'tbody': true, 'tfoot': true}, + 'tr': {'tr': true} + }, + doNotIndent: {"pre": true}, + allowUnquoted: true, + allowMissing: true + } : { + autoSelfClosers: {}, + implicitlyClosed: {}, + contextGrabbers: {}, + doNotIndent: {}, + allowUnquoted: false, + allowMissing: false + }; + var alignCDATA = parserConfig.alignCDATA; + + // Return variables for tokenizers + var tagName, type, setStyle; + + function inText(stream, state) { + function chain(parser) { + state.tokenize = parser; + return parser(stream, state); + } + + var ch = stream.next(); + if (ch == "<") { + if (stream.eat("!")) { + if (stream.eat("[")) { + if (stream.match("CDATA[")) return chain(inBlock("atom", "]]>")); + else return null; + } else if (stream.match("--")) { + return chain(inBlock("comment", "-->")); + } else if (stream.match("DOCTYPE", true, true)) { + stream.eatWhile(/[\w\._\-]/); + return chain(doctype(1)); + } else { + return null; + } + } else if (stream.eat("?")) { + stream.eatWhile(/[\w\._\-]/); + state.tokenize = inBlock("meta", "?>"); + return "meta"; + } else { + var isClose = stream.eat("/"); + tagName = ""; + var c; + while ((c = stream.eat(/[^\s\u00a0=<>\"\'\/?]/))) tagName += c; + if (!tagName) return "tag error"; + type = isClose ? "closeTag" : "openTag"; + state.tokenize = inTag; + return "tag"; + } + } else if (ch == "&") { + var ok; + if (stream.eat("#")) { + if (stream.eat("x")) { + ok = stream.eatWhile(/[a-fA-F\d]/) && stream.eat(";"); + } else { + ok = stream.eatWhile(/[\d]/) && stream.eat(";"); + } + } else { + ok = stream.eatWhile(/[\w\.\-:]/) && stream.eat(";"); + } + return ok ? "atom" : "error"; + } else { + stream.eatWhile(/[^&<]/); + return null; + } + } + + function inTag(stream, state) { + var ch = stream.next(); + if (ch == ">" || (ch == "/" && stream.eat(">"))) { + state.tokenize = inText; + type = ch == ">" ? "endTag" : "selfcloseTag"; + return "tag"; + } else if (ch == "=") { + type = "equals"; + return null; + } else if (ch == "<") { + state.tokenize = inText; + state.state = baseState; + state.tagName = state.tagStart = null; + var next = state.tokenize(stream, state); + return next ? next + " error" : "error"; + } else if (/[\'\"]/.test(ch)) { + state.tokenize = inAttribute(ch); + state.stringStartCol = stream.column(); + return state.tokenize(stream, state); + } else { + stream.eatWhile(/[^\s\u00a0=<>\"\']/); + return "word"; + } + } + + function inAttribute(quote) { + var closure = function(stream, state) { + while (!stream.eol()) { + if (stream.next() == quote) { + state.tokenize = inTag; + break; + } + } + return "string"; + }; + closure.isInAttribute = true; + return closure; + } + + function inBlock(style, terminator) { + return function(stream, state) { + while (!stream.eol()) { + if (stream.match(terminator)) { + state.tokenize = inText; + break; + } + stream.next(); + } + return style; + }; + } + function doctype(depth) { + return function(stream, state) { + var ch; + while ((ch = stream.next()) != null) { + if (ch == "<") { + state.tokenize = doctype(depth + 1); + return state.tokenize(stream, state); + } else if (ch == ">") { + if (depth == 1) { + state.tokenize = inText; + break; + } else { + state.tokenize = doctype(depth - 1); + return state.tokenize(stream, state); + } + } + } + return "meta"; + }; + } + + function Context(state, tagName, startOfLine) { + this.prev = state.context; + this.tagName = tagName; + this.indent = state.indented; + this.startOfLine = startOfLine; + if (Kludges.doNotIndent.hasOwnProperty(tagName) || (state.context && state.context.noIndent)) + this.noIndent = true; + } + function popContext(state) { + if (state.context) state.context = state.context.prev; + } + function maybePopContext(state, nextTagName) { + var parentTagName; + while (true) { + if (!state.context) { + return; + } + parentTagName = state.context.tagName.toLowerCase(); + if (!Kludges.contextGrabbers.hasOwnProperty(parentTagName) || + !Kludges.contextGrabbers[parentTagName].hasOwnProperty(nextTagName)) { + return; + } + popContext(state); + } + } + + function baseState(type, stream, state) { + if (type == "openTag") { + state.tagName = tagName; + state.tagStart = stream.column(); + return attrState; + } else if (type == "closeTag") { + var err = false; + if (state.context) { + if (state.context.tagName != tagName) { + if (Kludges.implicitlyClosed.hasOwnProperty(state.context.tagName.toLowerCase())) + popContext(state); + err = !state.context || state.context.tagName != tagName; + } + } else { + err = true; + } + if (err) setStyle = "error"; + return err ? closeStateErr : closeState; + } else { + return baseState; + } + } + function closeState(type, _stream, state) { + if (type != "endTag") { + setStyle = "error"; + return closeState; + } + popContext(state); + return baseState; + } + function closeStateErr(type, stream, state) { + setStyle = "error"; + return closeState(type, stream, state); + } + + function attrState(type, _stream, state) { + if (type == "word") { + setStyle = "attribute"; + return attrEqState; + } else if (type == "endTag" || type == "selfcloseTag") { + var tagName = state.tagName, tagStart = state.tagStart; + state.tagName = state.tagStart = null; + if (type == "selfcloseTag" || + Kludges.autoSelfClosers.hasOwnProperty(tagName.toLowerCase())) { + maybePopContext(state, tagName.toLowerCase()); + } else { + maybePopContext(state, tagName.toLowerCase()); + state.context = new Context(state, tagName, tagStart == state.indented); + } + return baseState; + } + setStyle = "error"; + return attrState; + } + function attrEqState(type, stream, state) { + if (type == "equals") return attrValueState; + if (!Kludges.allowMissing) setStyle = "error"; + return attrState(type, stream, state); + } + function attrValueState(type, stream, state) { + if (type == "string") return attrContinuedState; + if (type == "word" && Kludges.allowUnquoted) {setStyle = "string"; return attrState;} + setStyle = "error"; + return attrState(type, stream, state); + } + function attrContinuedState(type, stream, state) { + if (type == "string") return attrContinuedState; + return attrState(type, stream, state); + } + + return { + startState: function() { + return {tokenize: inText, + state: baseState, + indented: 0, + tagName: null, tagStart: null, + context: null}; + }, + + token: function(stream, state) { + if (!state.tagName && stream.sol()) + state.indented = stream.indentation(); + + if (stream.eatSpace()) return null; + tagName = type = null; + var style = state.tokenize(stream, state); + if ((style || type) && style != "comment") { + setStyle = null; + state.state = state.state(type || style, stream, state); + if (setStyle) + style = setStyle == "error" ? style + " error" : setStyle; + } + return style; + }, + + indent: function(state, textAfter, fullLine) { + var context = state.context; + // Indent multi-line strings (e.g. css). + if (state.tokenize.isInAttribute) { + return state.stringStartCol + 1; + } + if (context && context.noIndent) return CodeMirror.Pass; + if (state.tokenize != inTag && state.tokenize != inText) + return fullLine ? fullLine.match(/^(\s*)/)[0].length : 0; + // Indent the starts of attribute names. + if (state.tagName) { + if (multilineTagIndentPastTag) + return state.tagStart + state.tagName.length + 2; + else + return state.tagStart + indentUnit * multilineTagIndentFactor; + } + if (alignCDATA && /", + + configuration: parserConfig.htmlMode ? "html" : "xml", + helperType: parserConfig.htmlMode ? "html" : "xml" + }; +}); + +CodeMirror.defineMIME("text/xml", "xml"); +CodeMirror.defineMIME("application/xml", "xml"); +if (!CodeMirror.mimeModes.hasOwnProperty("text/html")) + CodeMirror.defineMIME("text/html", {name: "xml", htmlMode: true}); diff --git a/common/static/js/vendor/CodeMirror/addons/yaml.js b/common/static/js/vendor/CodeMirror/addons/yaml.js new file mode 100644 index 0000000000..efacd7d563 --- /dev/null +++ b/common/static/js/vendor/CodeMirror/addons/yaml.js @@ -0,0 +1,97 @@ +CodeMirror.defineMode("yaml", function() { + + var cons = ['true', 'false', 'on', 'off', 'yes', 'no']; + var keywordRegex = new RegExp("\\b(("+cons.join(")|(")+"))$", 'i'); + + return { + token: function(stream, state) { + var ch = stream.peek(); + var esc = state.escaped; + state.escaped = false; + /* comments */ + if (ch == "#" && (stream.pos == 0 || /\s/.test(stream.string.charAt(stream.pos - 1)))) { + stream.skipToEnd(); return "comment"; + } + if (state.literal && stream.indentation() > state.keyCol) { + stream.skipToEnd(); return "string"; + } else if (state.literal) { state.literal = false; } + if (stream.sol()) { + state.keyCol = 0; + state.pair = false; + state.pairStart = false; + /* document start */ + if(stream.match(/---/)) { return "def"; } + /* document end */ + if (stream.match(/\.\.\./)) { return "def"; } + /* array list item */ + if (stream.match(/\s*-\s+/)) { return 'meta'; } + } + /* inline pairs/lists */ + if (stream.match(/^(\{|\}|\[|\])/)) { + if (ch == '{') + state.inlinePairs++; + else if (ch == '}') + state.inlinePairs--; + else if (ch == '[') + state.inlineList++; + else + state.inlineList--; + return 'meta'; + } + + /* list seperator */ + if (state.inlineList > 0 && !esc && ch == ',') { + stream.next(); + return 'meta'; + } + /* pairs seperator */ + if (state.inlinePairs > 0 && !esc && ch == ',') { + state.keyCol = 0; + state.pair = false; + state.pairStart = false; + stream.next(); + return 'meta'; + } + + /* start of value of a pair */ + if (state.pairStart) { + /* block literals */ + if (stream.match(/^\s*(\||\>)\s*/)) { state.literal = true; return 'meta'; }; + /* references */ + if (stream.match(/^\s*(\&|\*)[a-z0-9\._-]+\b/i)) { return 'variable-2'; } + /* numbers */ + if (state.inlinePairs == 0 && stream.match(/^\s*-?[0-9\.\,]+\s?$/)) { return 'number'; } + if (state.inlinePairs > 0 && stream.match(/^\s*-?[0-9\.\,]+\s?(?=(,|}))/)) { return 'number'; } + /* keywords */ + if (stream.match(keywordRegex)) { return 'keyword'; } + } + + /* pairs (associative arrays) -> key */ + if (!state.pair && stream.match(/^\s*\S+(?=\s*:($|\s))/i)) { + state.pair = true; + state.keyCol = stream.indentation(); + return "atom"; + } + if (state.pair && stream.match(/^:\s*/)) { state.pairStart = true; return 'meta'; } + + /* nothing found, continue */ + state.pairStart = false; + state.escaped = (ch == '\\'); + stream.next(); + return null; + }, + startState: function() { + return { + pair: false, + pairStart: false, + keyCol: 0, + inlinePairs: 0, + inlineList: 0, + literal: false, + escaped: false + }; + } + }; +}); + +CodeMirror.defineMIME("text/x-yaml", "yaml"); diff --git a/common/static/js/vendor/CodeMirror/codemirror-3.21.0.css b/common/static/js/vendor/CodeMirror/codemirror-3.21.0.css new file mode 100644 index 0000000000..23eaf74d44 --- /dev/null +++ b/common/static/js/vendor/CodeMirror/codemirror-3.21.0.css @@ -0,0 +1,263 @@ +/* BASICS */ + +.CodeMirror { + /* Set height, width, borders, and global font properties here */ + font-family: monospace; + height: 300px; +} +.CodeMirror-scroll { + /* Set scrolling behaviour here */ + overflow: auto; +} + +/* PADDING */ + +.CodeMirror-lines { + padding: 4px 0; /* Vertical padding around content */ +} +.CodeMirror pre { + padding: 0 4px; /* Horizontal padding of content */ +} + +.CodeMirror-scrollbar-filler, .CodeMirror-gutter-filler { + background-color: white; /* The little square between H and V scrollbars */ +} + +/* GUTTER */ + +.CodeMirror-gutters { + border-right: 1px solid #ddd; + background-color: #f7f7f7; + white-space: nowrap; +} +.CodeMirror-linenumbers {} +.CodeMirror-linenumber { + padding: 0 3px 0 5px; + min-width: 20px; + text-align: right; + color: #999; +} + +/* CURSOR */ + +.CodeMirror div.CodeMirror-cursor { + border-left: 1px solid black; + z-index: 3; +} +/* Shown when moving in bi-directional text */ +.CodeMirror div.CodeMirror-secondarycursor { + border-left: 1px solid silver; +} +.CodeMirror.cm-keymap-fat-cursor div.CodeMirror-cursor { + width: auto; + border: 0; + background: #7e7; + z-index: 1; +} +/* Can style cursor different in overwrite (non-insert) mode */ +.CodeMirror div.CodeMirror-cursor.CodeMirror-overwrite {} + +.cm-tab { display: inline-block; } + +/* DEFAULT THEME */ + +.cm-s-default .cm-keyword {color: #708;} +.cm-s-default .cm-atom {color: #219;} +.cm-s-default .cm-number {color: #164;} +.cm-s-default .cm-def {color: #00f;} +.cm-s-default .cm-variable {color: black;} +.cm-s-default .cm-variable-2 {color: #05a;} +.cm-s-default .cm-variable-3 {color: #085;} +.cm-s-default .cm-property {color: black;} +.cm-s-default .cm-operator {color: black;} +.cm-s-default .cm-comment {color: #a50;} +.cm-s-default .cm-string {color: #a11;} +.cm-s-default .cm-string-2 {color: #f50;} +.cm-s-default .cm-meta {color: #555;} +.cm-s-default .cm-qualifier {color: #555;} +.cm-s-default .cm-builtin {color: #30a;} +.cm-s-default .cm-bracket {color: #997;} +.cm-s-default .cm-tag {color: #170;} +.cm-s-default .cm-attribute {color: #00c;} +.cm-s-default .cm-header {color: blue;} +.cm-s-default .cm-quote {color: #090;} +.cm-s-default .cm-hr {color: #999;} +.cm-s-default .cm-link {color: #00c;} + +.cm-negative {color: #d44;} +.cm-positive {color: #292;} +.cm-header, .cm-strong {font-weight: bold;} +.cm-em {font-style: italic;} +.cm-link {text-decoration: underline;} + +.cm-s-default .cm-error {color: #f00;} +.cm-invalidchar {color: #f00;} + +div.CodeMirror span.CodeMirror-matchingbracket {color: #0f0;} +div.CodeMirror span.CodeMirror-nonmatchingbracket {color: #f22;} +.CodeMirror-activeline-background {background: #e8f2ff;} + +/* STOP */ + +/* The rest of this file contains styles related to the mechanics of + the editor. You probably shouldn't touch them. */ + +.CodeMirror { + line-height: 1; + position: relative; + overflow: hidden; + background: white; + color: black; +} + +.CodeMirror-scroll { + /* 30px is the magic margin used to hide the element's real scrollbars */ + /* See overflow: hidden in .CodeMirror */ + margin-bottom: -30px; margin-right: -30px; + padding-bottom: 30px; padding-right: 30px; + height: 100%; + outline: none; /* Prevent dragging from highlighting the element */ + position: relative; + -moz-box-sizing: content-box; + box-sizing: content-box; +} +.CodeMirror-sizer { + position: relative; +} + +/* The fake, visible scrollbars. Used to force redraw during scrolling + before actuall scrolling happens, thus preventing shaking and + flickering artifacts. */ +.CodeMirror-vscrollbar, .CodeMirror-hscrollbar, .CodeMirror-scrollbar-filler, .CodeMirror-gutter-filler { + position: absolute; + z-index: 6; + display: none; +} +.CodeMirror-vscrollbar { + right: 0; top: 0; + overflow-x: hidden; + overflow-y: scroll; +} +.CodeMirror-hscrollbar { + bottom: 0; left: 0; + overflow-y: hidden; + overflow-x: scroll; +} +.CodeMirror-scrollbar-filler { + right: 0; bottom: 0; +} +.CodeMirror-gutter-filler { + left: 0; bottom: 0; +} + +.CodeMirror-gutters { + position: absolute; left: 0; top: 0; + padding-bottom: 30px; + z-index: 3; +} +.CodeMirror-gutter { + white-space: normal; + height: 100%; + -moz-box-sizing: content-box; + box-sizing: content-box; + padding-bottom: 30px; + margin-bottom: -32px; + display: inline-block; + /* Hack to make IE7 behave */ + *zoom:1; + *display:inline; +} +.CodeMirror-gutter-elt { + position: absolute; + cursor: default; + z-index: 4; +} + +.CodeMirror-lines { + cursor: text; +} +.CodeMirror pre { + /* Reset some styles that the rest of the page might have set */ + -moz-border-radius: 0; -webkit-border-radius: 0; border-radius: 0; + border-width: 0; + background: transparent; + font-family: inherit; + font-size: inherit; + margin: 0; + white-space: pre; + word-wrap: normal; + line-height: inherit; + color: inherit; + z-index: 2; + position: relative; + overflow: visible; +} +.CodeMirror-wrap pre { + word-wrap: break-word; + white-space: pre-wrap; + word-break: normal; +} +.CodeMirror-code pre { + border-right: 30px solid transparent; + width: -webkit-fit-content; + width: -moz-fit-content; + width: fit-content; +} +.CodeMirror-wrap .CodeMirror-code pre { + border-right: none; + width: auto; +} +.CodeMirror-linebackground { + position: absolute; + left: 0; right: 0; top: 0; bottom: 0; + z-index: 0; +} + +.CodeMirror-linewidget { + position: relative; + z-index: 2; + overflow: auto; +} + +.CodeMirror-widget {} + +.CodeMirror-wrap .CodeMirror-scroll { + overflow-x: hidden; +} + +.CodeMirror-measure { + position: absolute; + width: 100%; + height: 0; + overflow: hidden; + visibility: hidden; +} +.CodeMirror-measure pre { position: static; } + +.CodeMirror div.CodeMirror-cursor { + position: absolute; + visibility: hidden; + border-right: none; + width: 0; +} +.CodeMirror-focused div.CodeMirror-cursor { + visibility: visible; +} + +.CodeMirror-selected { background: #d9d9d9; } +.CodeMirror-focused .CodeMirror-selected { background: #d7d4f0; } + +.cm-searching { + background: #ffa; + background: rgba(255, 255, 0, .4); +} + +/* IE7 hack to prevent it from returning funny offsetTops on the spans */ +.CodeMirror span { *vertical-align: text-bottom; } + +@media print { + /* Hide the cursor when printing */ + .CodeMirror div.CodeMirror-cursor { + visibility: hidden; + } +} diff --git a/common/static/js/vendor/CodeMirror/codemirror-accessible.js b/common/static/js/vendor/CodeMirror/codemirror-accessible.js new file mode 100644 index 0000000000..bd37cfb72b --- /dev/null +++ b/common/static/js/vendor/CodeMirror/codemirror-accessible.js @@ -0,0 +1,5828 @@ +// CodeMirror version 3.15 +// +// CodeMirror is the only global var we claim +window.CodeMirror = (function() { + "use strict"; + + // BROWSER SNIFFING + + // Crude, but necessary to handle a number of hard-to-feature-detect + // bugs and behavior differences. + var gecko = /gecko\/\d/i.test(navigator.userAgent); + var ie = /MSIE \d/.test(navigator.userAgent); + var ie_lt8 = ie && (document.documentMode == null || document.documentMode < 8); + var ie_lt9 = ie && (document.documentMode == null || document.documentMode < 9); + var webkit = /WebKit\//.test(navigator.userAgent); + var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(navigator.userAgent); + var chrome = /Chrome\//.test(navigator.userAgent); + var opera = /Opera\//.test(navigator.userAgent); + var safari = /Apple Computer/.test(navigator.vendor); + var khtml = /KHTML\//.test(navigator.userAgent); + var mac_geLion = /Mac OS X 1\d\D([7-9]|\d\d)\D/.test(navigator.userAgent); + var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(navigator.userAgent); + var phantom = /PhantomJS/.test(navigator.userAgent); + + var ios = /AppleWebKit/.test(navigator.userAgent) && /Mobile\/\w+/.test(navigator.userAgent); + // This is woefully incomplete. Suggestions for alternative methods welcome. + var mobile = ios || /Android|webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(navigator.userAgent); + var mac = ios || /Mac/.test(navigator.platform); + var windows = /windows/i.test(navigator.platform); + + var opera_version = opera && navigator.userAgent.match(/Version\/(\d*\.\d*)/); + if (opera_version) opera_version = Number(opera_version[1]); + if (opera_version && opera_version >= 15) { opera = false; webkit = true; } + // Some browsers use the wrong event properties to signal cmd/ctrl on OS X + var flipCtrlCmd = mac && (qtwebkit || opera && (opera_version == null || opera_version < 12.11)); + var captureMiddleClick = gecko || (ie && !ie_lt9); + + // Optimize some code when these features are not used + var sawReadOnlySpans = false, sawCollapsedSpans = false; + + // CONSTRUCTOR + + function CodeMirror(place, options) { + if (!(this instanceof CodeMirror)) return new CodeMirror(place, options); + + this.options = options = options || {}; + // Determine effective options based on given values and defaults. + for (var opt in defaults) if (!options.hasOwnProperty(opt) && defaults.hasOwnProperty(opt)) + options[opt] = defaults[opt]; + setGuttersForLineNumbers(options); + + var docStart = typeof options.value == "string" ? 0 : options.value.first; + var display = this.display = makeDisplay(place, docStart); + display.wrapper.CodeMirror = this; + updateGutters(this); + if (options.autofocus && !mobile) focusInput(this); + + this.state = {keyMaps: [], + overlays: [], + modeGen: 0, + overwrite: false, focused: false, + suppressEdits: false, pasteIncoming: false, + draggingText: false, + highlight: new Delayed()}; + + themeChanged(this); + if (options.lineWrapping) + this.display.wrapper.className += " CodeMirror-wrap"; + + var doc = options.value; + if (typeof doc == "string") doc = new Doc(options.value, options.mode); + operation(this, attachDoc)(this, doc); + + // Override magic textarea content restore that IE sometimes does + // on our hidden textarea on reload + if (ie) setTimeout(bind(resetInput, this, true), 20); + + registerEventHandlers(this); + // IE throws unspecified error in certain cases, when + // trying to access activeElement before onload + var hasFocus; try { hasFocus = (document.activeElement == display.input); } catch(e) { } + if (hasFocus || (options.autofocus && !mobile)) setTimeout(bind(onFocus, this), 20); + else onBlur(this); + + operation(this, function() { + for (var opt in optionHandlers) + if (optionHandlers.propertyIsEnumerable(opt)) + optionHandlers[opt](this, options[opt], Init); + for (var i = 0; i < initHooks.length; ++i) initHooks[i](this); + })(); + } + + // DISPLAY CONSTRUCTOR + + function makeDisplay(place, docStart) { + var d = {}; + + var input = d.input = elt("textarea", null, null, "position: absolute; padding: 0; width: 1px; height: 1em; outline: none; font-size: 4px;"); + if (webkit) input.style.width = "1000px"; + else input.setAttribute("wrap", "off"); + // if border: 0; -- iOS fails to open keyboard (issue #1287) + if (ios) input.style.border = "1px solid black"; + input.setAttribute("autocorrect", "off"); input.setAttribute("autocapitalize", "off"); input.setAttribute("spellcheck", "false"); + + // Wraps and hides input textarea + d.inputDiv = elt("div", [input], null, "overflow: hidden; position: relative; width: 3px; height: 0px;"); + // The actual fake scrollbars. + d.scrollbarH = elt("div", [elt("div", null, null, "height: 1px")], "CodeMirror-hscrollbar"); + d.scrollbarV = elt("div", [elt("div", null, null, "width: 1px")], "CodeMirror-vscrollbar"); + d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler"); + d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler"); + // DIVs containing the selection and the actual code + d.lineDiv = elt("div", null, "CodeMirror-code"); + d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1"); + // Blinky cursor, and element used to ensure cursor fits at the end of a line + d.cursor = elt("div", "\u00a0", "CodeMirror-cursor"); + // Secondary cursor, shown when on a 'jump' in bi-directional text + d.otherCursor = elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor"); + // Used to measure text size + d.measure = elt("div", null, "CodeMirror-measure"); + // Wraps everything that needs to exist inside the vertically-padded coordinate system + d.lineSpace = elt("div", [d.measure, d.selectionDiv, d.lineDiv, d.cursor, d.otherCursor], + null, "position: relative; outline: none"); + // Moved around its parent to cover visible view + d.mover = elt("div", [elt("div", [d.lineSpace], "CodeMirror-lines")], null, "position: relative"); + // Set to the height of the text, causes scrolling + d.sizer = elt("div", [d.mover], "CodeMirror-sizer"); + // D is needed because behavior of elts with overflow: auto and padding is inconsistent across browsers + d.heightForcer = elt("div", null, null, "position: absolute; height: " + scrollerCutOff + "px; width: 1px;"); + // Will contain the gutters, if any + d.gutters = elt("div", null, "CodeMirror-gutters"); + d.lineGutter = null; + // Provides scrolling + d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-scroll"); + d.scroller.setAttribute("tabIndex", "-1"); + // The element in which the editor lives. + d.wrapper = elt("div", [d.inputDiv, d.scrollbarH, d.scrollbarV, + d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror"); + // Work around IE7 z-index bug + if (ie_lt8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0; } + if (place.appendChild) place.appendChild(d.wrapper); else place(d.wrapper); + + // Needed to hide big blue blinking cursor on Mobile Safari + if (ios) input.style.width = "0px"; + if (!webkit) d.scroller.draggable = true; + // Needed to handle Tab key in KHTML + if (khtml) { d.inputDiv.style.height = "1px"; d.inputDiv.style.position = "absolute"; } + // Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8). + else if (ie_lt8) d.scrollbarH.style.minWidth = d.scrollbarV.style.minWidth = "18px"; + + // Current visible range (may be bigger than the view window). + d.viewOffset = d.lastSizeC = 0; + d.showingFrom = d.showingTo = docStart; + + // Used to only resize the line number gutter when necessary (when + // the amount of lines crosses a boundary that makes its width change) + d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null; + // See readInput and resetInput + d.prevInput = ""; + // Set to true when a non-horizontal-scrolling widget is added. As + // an optimization, widget aligning is skipped when d is false. + d.alignWidgets = false; + // Flag that indicates whether we currently expect input to appear + // (after some event like 'keypress' or 'input') and are polling + // intensively. + d.pollingFast = false; + // Self-resetting timeout for the poller + d.poll = new Delayed(); + + d.cachedCharWidth = d.cachedTextHeight = null; + d.measureLineCache = []; + d.measureLineCachePos = 0; + + // Tracks when resetInput has punted to just putting a short + // string instead of the (large) selection. + d.inaccurateSelection = false; + + // Tracks the maximum line length so that the horizontal scrollbar + // can be kept static when scrolling. + d.maxLine = null; + d.maxLineLength = 0; + d.maxLineChanged = false; + + // Used for measuring wheel scrolling granularity + d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null; + + return d; + } + + // STATE UPDATES + + // Used to get the editor into a consistent state again when options change. + + function loadMode(cm) { + cm.doc.mode = CodeMirror.getMode(cm.options, cm.doc.modeOption); + cm.doc.iter(function(line) { + if (line.stateAfter) line.stateAfter = null; + if (line.styles) line.styles = null; + }); + cm.doc.frontier = cm.doc.first; + startWorker(cm, 100); + cm.state.modeGen++; + if (cm.curOp) regChange(cm); + } + + function wrappingChanged(cm) { + if (cm.options.lineWrapping) { + cm.display.wrapper.className += " CodeMirror-wrap"; + cm.display.sizer.style.minWidth = ""; + } else { + cm.display.wrapper.className = cm.display.wrapper.className.replace(" CodeMirror-wrap", ""); + computeMaxLength(cm); + } + estimateLineHeights(cm); + regChange(cm); + clearCaches(cm); + setTimeout(function(){updateScrollbars(cm);}, 100); + } + + function estimateHeight(cm) { + var th = textHeight(cm.display), wrapping = cm.options.lineWrapping; + var perLine = wrapping && Math.max(5, cm.display.scroller.clientWidth / charWidth(cm.display) - 3); + return function(line) { + if (lineIsHidden(cm.doc, line)) + return 0; + else if (wrapping) + return (Math.ceil(line.text.length / perLine) || 1) * th; + else + return th; + }; + } + + function estimateLineHeights(cm) { + var doc = cm.doc, est = estimateHeight(cm); + doc.iter(function(line) { + var estHeight = est(line); + if (estHeight != line.height) updateLineHeight(line, estHeight); + }); + } + + function keyMapChanged(cm) { + var map = keyMap[cm.options.keyMap], style = map.style; + cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-keymap-\S+/g, "") + + (style ? " cm-keymap-" + style : ""); + cm.state.disableInput = map.disableInput; + } + + function themeChanged(cm) { + cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s-\S+/g, "") + + cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-"); + clearCaches(cm); + } + + function guttersChanged(cm) { + updateGutters(cm); + regChange(cm); + setTimeout(function(){alignHorizontally(cm);}, 20); + } + + function updateGutters(cm) { + var gutters = cm.display.gutters, specs = cm.options.gutters; + removeChildren(gutters); + for (var i = 0; i < specs.length; ++i) { + var gutterClass = specs[i]; + var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + gutterClass)); + if (gutterClass == "CodeMirror-linenumbers") { + cm.display.lineGutter = gElt; + gElt.style.width = (cm.display.lineNumWidth || 1) + "px"; + } + } + gutters.style.display = i ? "" : "none"; + } + + function lineLength(doc, line) { + if (line.height == 0) return 0; + var len = line.text.length, merged, cur = line; + while (merged = collapsedSpanAtStart(cur)) { + var found = merged.find(); + cur = getLine(doc, found.from.line); + len += found.from.ch - found.to.ch; + } + cur = line; + while (merged = collapsedSpanAtEnd(cur)) { + var found = merged.find(); + len -= cur.text.length - found.from.ch; + cur = getLine(doc, found.to.line); + len += cur.text.length - found.to.ch; + } + return len; + } + + function computeMaxLength(cm) { + var d = cm.display, doc = cm.doc; + d.maxLine = getLine(doc, doc.first); + d.maxLineLength = lineLength(doc, d.maxLine); + d.maxLineChanged = true; + doc.iter(function(line) { + var len = lineLength(doc, line); + if (len > d.maxLineLength) { + d.maxLineLength = len; + d.maxLine = line; + } + }); + } + + // Make sure the gutters options contains the element + // "CodeMirror-linenumbers" when the lineNumbers option is true. + function setGuttersForLineNumbers(options) { + var found = false; + for (var i = 0; i < options.gutters.length; ++i) { + if (options.gutters[i] == "CodeMirror-linenumbers") { + if (options.lineNumbers) found = true; + else options.gutters.splice(i--, 1); + } + } + if (!found && options.lineNumbers) + options.gutters.push("CodeMirror-linenumbers"); + } + + // SCROLLBARS + + // Re-synchronize the fake scrollbars with the actual size of the + // content. Optionally force a scrollTop. + function updateScrollbars(cm) { + var d = cm.display, docHeight = cm.doc.height; + var totalHeight = docHeight + paddingVert(d); + d.sizer.style.minHeight = d.heightForcer.style.top = totalHeight + "px"; + d.gutters.style.height = Math.max(totalHeight, d.scroller.clientHeight - scrollerCutOff) + "px"; + var scrollHeight = Math.max(totalHeight, d.scroller.scrollHeight); + var needsH = d.scroller.scrollWidth > (d.scroller.clientWidth + 1); + var needsV = scrollHeight > (d.scroller.clientHeight + 1); + if (needsV) { + d.scrollbarV.style.display = "block"; + d.scrollbarV.style.bottom = needsH ? scrollbarWidth(d.measure) + "px" : "0"; + d.scrollbarV.firstChild.style.height = + (scrollHeight - d.scroller.clientHeight + d.scrollbarV.clientHeight) + "px"; + } else d.scrollbarV.style.display = ""; + if (needsH) { + d.scrollbarH.style.display = "block"; + d.scrollbarH.style.right = needsV ? scrollbarWidth(d.measure) + "px" : "0"; + d.scrollbarH.firstChild.style.width = + (d.scroller.scrollWidth - d.scroller.clientWidth + d.scrollbarH.clientWidth) + "px"; + } else d.scrollbarH.style.display = ""; + if (needsH && needsV) { + d.scrollbarFiller.style.display = "block"; + d.scrollbarFiller.style.height = d.scrollbarFiller.style.width = scrollbarWidth(d.measure) + "px"; + } else d.scrollbarFiller.style.display = ""; + if (needsH && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutter) { + d.gutterFiller.style.display = "block"; + d.gutterFiller.style.height = scrollbarWidth(d.measure) + "px"; + d.gutterFiller.style.width = d.gutters.offsetWidth + "px"; + } else d.gutterFiller.style.display = ""; + + if (mac_geLion && scrollbarWidth(d.measure) === 0) + d.scrollbarV.style.minWidth = d.scrollbarH.style.minHeight = mac_geMountainLion ? "18px" : "12px"; + } + + function visibleLines(display, doc, viewPort) { + var top = display.scroller.scrollTop, height = display.wrapper.clientHeight; + if (typeof viewPort == "number") top = viewPort; + else if (viewPort) {top = viewPort.top; height = viewPort.bottom - viewPort.top;} + top = Math.floor(top - paddingTop(display)); + var bottom = Math.ceil(top + height); + return {from: lineAtHeight(doc, top), to: lineAtHeight(doc, bottom)}; + } + + // LINE NUMBERS + + function alignHorizontally(cm) { + var display = cm.display; + if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fixedGutter)) return; + var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.doc.scrollLeft; + var gutterW = display.gutters.offsetWidth, l = comp + "px"; + for (var n = display.lineDiv.firstChild; n; n = n.nextSibling) if (n.alignable) { + for (var i = 0, a = n.alignable; i < a.length; ++i) a[i].style.left = l; + } + if (cm.options.fixedGutter) + display.gutters.style.left = (comp + gutterW) + "px"; + } + + function maybeUpdateLineNumberWidth(cm) { + if (!cm.options.lineNumbers) return false; + var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display; + if (last.length != display.lineNumChars) { + var test = display.measure.appendChild(elt("div", [elt("div", last)], + "CodeMirror-linenumber CodeMirror-gutter-elt")); + var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW; + display.lineGutter.style.width = ""; + display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding); + display.lineNumWidth = display.lineNumInnerWidth + padding; + display.lineNumChars = display.lineNumInnerWidth ? last.length : -1; + display.lineGutter.style.width = display.lineNumWidth + "px"; + return true; + } + return false; + } + + function lineNumberFor(options, i) { + return String(options.lineNumberFormatter(i + options.firstLineNumber)); + } + function compensateForHScroll(display) { + return getRect(display.scroller).left - getRect(display.sizer).left; + } + + // DISPLAY DRAWING + + function updateDisplay(cm, changes, viewPort, forced) { + var oldFrom = cm.display.showingFrom, oldTo = cm.display.showingTo, updated; + var visible = visibleLines(cm.display, cm.doc, viewPort); + for (;;) { + if (!updateDisplayInner(cm, changes, visible, forced)) break; + forced = false; + updated = true; + updateSelection(cm); + updateScrollbars(cm); + + // Clip forced viewport to actual scrollable area + if (viewPort) + viewPort = Math.min(cm.display.scroller.scrollHeight - cm.display.scroller.clientHeight, + typeof viewPort == "number" ? viewPort : viewPort.top); + visible = visibleLines(cm.display, cm.doc, viewPort); + if (visible.from >= cm.display.showingFrom && visible.to <= cm.display.showingTo) + break; + changes = []; + } + + if (updated) { + signalLater(cm, "update", cm); + if (cm.display.showingFrom != oldFrom || cm.display.showingTo != oldTo) + signalLater(cm, "viewportChange", cm, cm.display.showingFrom, cm.display.showingTo); + } + return updated; + } + + // Uses a set of changes plus the current scroll position to + // determine which DOM updates have to be made, and makes the + // updates. + function updateDisplayInner(cm, changes, visible, forced) { + var display = cm.display, doc = cm.doc; + if (!display.wrapper.clientWidth) { + display.showingFrom = display.showingTo = doc.first; + display.viewOffset = 0; + return; + } + + // Bail out if the visible area is already rendered and nothing changed. + if (!forced && changes.length == 0 && + visible.from > display.showingFrom && visible.to < display.showingTo) + return; + + if (maybeUpdateLineNumberWidth(cm)) + changes = [{from: doc.first, to: doc.first + doc.size}]; + var gutterW = display.sizer.style.marginLeft = display.gutters.offsetWidth + "px"; + display.scrollbarH.style.left = cm.options.fixedGutter ? gutterW : "0"; + + // Used to determine which lines need their line numbers updated + var positionsChangedFrom = Infinity; + if (cm.options.lineNumbers) + for (var i = 0; i < changes.length; ++i) + if (changes[i].diff) { positionsChangedFrom = changes[i].from; break; } + + var end = doc.first + doc.size; + var from = Math.max(visible.from - cm.options.viewportMargin, doc.first); + var to = Math.min(end, visible.to + cm.options.viewportMargin); + if (display.showingFrom < from && from - display.showingFrom < 20) from = Math.max(doc.first, display.showingFrom); + if (display.showingTo > to && display.showingTo - to < 20) to = Math.min(end, display.showingTo); + if (sawCollapsedSpans) { + from = lineNo(visualLine(doc, getLine(doc, from))); + while (to < end && lineIsHidden(doc, getLine(doc, to))) ++to; + } + + // Create a range of theoretically intact lines, and punch holes + // in that using the change info. + var intact = [{from: Math.max(display.showingFrom, doc.first), + to: Math.min(display.showingTo, end)}]; + if (intact[0].from >= intact[0].to) intact = []; + else intact = computeIntact(intact, changes); + // When merged lines are present, we might have to reduce the + // intact ranges because changes in continued fragments of the + // intact lines do require the lines to be redrawn. + if (sawCollapsedSpans) + for (var i = 0; i < intact.length; ++i) { + var range = intact[i], merged; + while (merged = collapsedSpanAtEnd(getLine(doc, range.to - 1))) { + var newTo = merged.find().from.line; + if (newTo > range.from) range.to = newTo; + else { intact.splice(i--, 1); break; } + } + } + + // Clip off the parts that won't be visible + var intactLines = 0; + for (var i = 0; i < intact.length; ++i) { + var range = intact[i]; + if (range.from < from) range.from = from; + if (range.to > to) range.to = to; + if (range.from >= range.to) intact.splice(i--, 1); + else intactLines += range.to - range.from; + } + if (!forced && intactLines == to - from && from == display.showingFrom && to == display.showingTo) { + updateViewOffset(cm); + return; + } + intact.sort(function(a, b) {return a.from - b.from;}); + + // Avoid crashing on IE's "unspecified error" when in iframes + try { + var focused = document.activeElement; + } catch(e) {} + if (intactLines < (to - from) * .7) display.lineDiv.style.display = "none"; + patchDisplay(cm, from, to, intact, positionsChangedFrom); + display.lineDiv.style.display = ""; + if (focused && document.activeElement != focused && focused.offsetHeight) focused.focus(); + + var different = from != display.showingFrom || to != display.showingTo || + display.lastSizeC != display.wrapper.clientHeight; + // This is just a bogus formula that detects when the editor is + // resized or the font size changes. + if (different) { + display.lastSizeC = display.wrapper.clientHeight; + startWorker(cm, 400); + } + display.showingFrom = from; display.showingTo = to; + + updateHeightsInViewport(cm); + updateViewOffset(cm); + + return true; + } + + function updateHeightsInViewport(cm) { + var display = cm.display; + var prevBottom = display.lineDiv.offsetTop; + for (var node = display.lineDiv.firstChild, height; node; node = node.nextSibling) if (node.lineObj) { + if (ie_lt8) { + var bot = node.offsetTop + node.offsetHeight; + height = bot - prevBottom; + prevBottom = bot; + } else { + var box = getRect(node); + height = box.bottom - box.top; + } + var diff = node.lineObj.height - height; + if (height < 2) height = textHeight(display); + if (diff > .001 || diff < -.001) { + updateLineHeight(node.lineObj, height); + var widgets = node.lineObj.widgets; + if (widgets) for (var i = 0; i < widgets.length; ++i) + widgets[i].height = widgets[i].node.offsetHeight; + } + } + } + + function updateViewOffset(cm) { + var off = cm.display.viewOffset = heightAtLine(cm, getLine(cm.doc, cm.display.showingFrom)); + // Position the mover div to align with the current virtual scroll position + cm.display.mover.style.top = off + "px"; + } + + function computeIntact(intact, changes) { + for (var i = 0, l = changes.length || 0; i < l; ++i) { + var change = changes[i], intact2 = [], diff = change.diff || 0; + for (var j = 0, l2 = intact.length; j < l2; ++j) { + var range = intact[j]; + if (change.to <= range.from && change.diff) { + intact2.push({from: range.from + diff, to: range.to + diff}); + } else if (change.to <= range.from || change.from >= range.to) { + intact2.push(range); + } else { + if (change.from > range.from) + intact2.push({from: range.from, to: change.from}); + if (change.to < range.to) + intact2.push({from: change.to + diff, to: range.to + diff}); + } + } + intact = intact2; + } + return intact; + } + + function getDimensions(cm) { + var d = cm.display, left = {}, width = {}; + for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) { + left[cm.options.gutters[i]] = n.offsetLeft; + width[cm.options.gutters[i]] = n.offsetWidth; + } + return {fixedPos: compensateForHScroll(d), + gutterTotalWidth: d.gutters.offsetWidth, + gutterLeft: left, + gutterWidth: width, + wrapperWidth: d.wrapper.clientWidth}; + } + + function patchDisplay(cm, from, to, intact, updateNumbersFrom) { + var dims = getDimensions(cm); + var display = cm.display, lineNumbers = cm.options.lineNumbers; + if (!intact.length && (!webkit || !cm.display.currentWheelTarget)) + removeChildren(display.lineDiv); + var container = display.lineDiv, cur = container.firstChild; + + function rm(node) { + var next = node.nextSibling; + if (webkit && mac && cm.display.currentWheelTarget == node) { + node.style.display = "none"; + node.lineObj = null; + } else { + node.parentNode.removeChild(node); + } + return next; + } + + var nextIntact = intact.shift(), lineN = from; + cm.doc.iter(from, to, function(line) { + if (nextIntact && nextIntact.to == lineN) nextIntact = intact.shift(); + if (lineIsHidden(cm.doc, line)) { + if (line.height != 0) updateLineHeight(line, 0); + if (line.widgets && cur.previousSibling) for (var i = 0; i < line.widgets.length; ++i) { + var w = line.widgets[i]; + if (w.showIfHidden) { + var prev = cur.previousSibling; + if (/pre/i.test(prev.nodeName)) { + var wrap = elt("div", null, null, "position: relative"); + prev.parentNode.replaceChild(wrap, prev); + wrap.appendChild(prev); + prev = wrap; + } + var wnode = prev.appendChild(elt("div", [w.node], "CodeMirror-linewidget")); + if (!w.handleMouseEvents) wnode.ignoreEvents = true; + positionLineWidget(w, wnode, prev, dims); + } + } + } else if (nextIntact && nextIntact.from <= lineN && nextIntact.to > lineN) { + // This line is intact. Skip to the actual node. Update its + // line number if needed. + while (cur.lineObj != line) cur = rm(cur); + if (lineNumbers && updateNumbersFrom <= lineN && cur.lineNumber) + setTextContent(cur.lineNumber, lineNumberFor(cm.options, lineN)); + cur = cur.nextSibling; + } else { + // For lines with widgets, make an attempt to find and reuse + // the existing element, so that widgets aren't needlessly + // removed and re-inserted into the dom + if (line.widgets) for (var j = 0, search = cur, reuse; search && j < 20; ++j, search = search.nextSibling) + if (search.lineObj == line && /div/i.test(search.nodeName)) { reuse = search; break; } + // This line needs to be generated. + var lineNode = buildLineElement(cm, line, lineN, dims, reuse); + if (lineNode != reuse) { + container.insertBefore(lineNode, cur); + } else { + while (cur != reuse) cur = rm(cur); + cur = cur.nextSibling; + } + + lineNode.lineObj = line; + } + ++lineN; + }); + while (cur) cur = rm(cur); + } + + function buildLineElement(cm, line, lineNo, dims, reuse) { + var lineElement = lineContent(cm, line); + var markers = line.gutterMarkers, display = cm.display, wrap; + + if (!cm.options.lineNumbers && !markers && !line.bgClass && !line.wrapClass && !line.widgets) + return lineElement; + + // Lines with gutter elements, widgets or a background class need + // to be wrapped again, and have the extra elements added to the + // wrapper div + + if (reuse) { + reuse.alignable = null; + var isOk = true, widgetsSeen = 0, insertBefore = null; + for (var n = reuse.firstChild, next; n; n = next) { + next = n.nextSibling; + if (!/\bCodeMirror-linewidget\b/.test(n.className)) { + reuse.removeChild(n); + } else { + for (var i = 0; i < line.widgets.length; ++i) { + var widget = line.widgets[i]; + if (widget.node == n.firstChild) { + if (!widget.above && !insertBefore) insertBefore = n; + positionLineWidget(widget, n, reuse, dims); + ++widgetsSeen; + break; + } + } + if (i == line.widgets.length) { isOk = false; break; } + } + } + reuse.insertBefore(lineElement, insertBefore); + if (isOk && widgetsSeen == line.widgets.length) { + wrap = reuse; + reuse.className = line.wrapClass || ""; + } + } + if (!wrap) { + wrap = elt("div", null, line.wrapClass, "position: relative"); + wrap.appendChild(lineElement); + } + // Kludge to make sure the styled element lies behind the selection (by z-index) + if (line.bgClass) + wrap.insertBefore(elt("div", null, line.bgClass + " CodeMirror-linebackground"), wrap.firstChild); + if (cm.options.lineNumbers || markers) { + var gutterWrap = wrap.insertBefore(elt("div", null, null, "position: absolute; left: " + + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px"), + wrap.firstChild); + if (cm.options.fixedGutter) (wrap.alignable || (wrap.alignable = [])).push(gutterWrap); + if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"])) + wrap.lineNumber = gutterWrap.appendChild( + elt("div", lineNumberFor(cm.options, lineNo), + "CodeMirror-linenumber CodeMirror-gutter-elt", + "left: " + dims.gutterLeft["CodeMirror-linenumbers"] + "px; width: " + + display.lineNumInnerWidth + "px")); + if (markers) + for (var k = 0; k < cm.options.gutters.length; ++k) { + var id = cm.options.gutters[k], found = markers.hasOwnProperty(id) && markers[id]; + if (found) + gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt", "left: " + + dims.gutterLeft[id] + "px; width: " + dims.gutterWidth[id] + "px")); + } + } + if (ie_lt8) wrap.style.zIndex = 2; + if (line.widgets && wrap != reuse) for (var i = 0, ws = line.widgets; i < ws.length; ++i) { + var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget"); + if (!widget.handleMouseEvents) node.ignoreEvents = true; + positionLineWidget(widget, node, wrap, dims); + if (widget.above) + wrap.insertBefore(node, cm.options.lineNumbers && line.height != 0 ? gutterWrap : lineElement); + else + wrap.appendChild(node); + signalLater(widget, "redraw"); + } + return wrap; + } + + function positionLineWidget(widget, node, wrap, dims) { + if (widget.noHScroll) { + (wrap.alignable || (wrap.alignable = [])).push(node); + var width = dims.wrapperWidth; + node.style.left = dims.fixedPos + "px"; + if (!widget.coverGutter) { + width -= dims.gutterTotalWidth; + node.style.paddingLeft = dims.gutterTotalWidth + "px"; + } + node.style.width = width + "px"; + } + if (widget.coverGutter) { + node.style.zIndex = 5; + node.style.position = "relative"; + if (!widget.noHScroll) node.style.marginLeft = -dims.gutterTotalWidth + "px"; + } + } + + // SELECTION / CURSOR + + function updateSelection(cm) { + var display = cm.display; + var collapsed = posEq(cm.doc.sel.from, cm.doc.sel.to); + if (collapsed || cm.options.showCursorWhenSelecting) + updateSelectionCursor(cm); + else + display.cursor.style.display = display.otherCursor.style.display = "none"; + if (!collapsed) + updateSelectionRange(cm); + else + display.selectionDiv.style.display = "none"; + + // Move the hidden textarea near the cursor to prevent scrolling artifacts + if (cm.options.moveInputWithCursor) { + var headPos = cursorCoords(cm, cm.doc.sel.head, "div"); + var wrapOff = getRect(display.wrapper), lineOff = getRect(display.lineDiv); + display.inputDiv.style.top = Math.max(0, Math.min(display.wrapper.clientHeight - 10, + headPos.top + lineOff.top - wrapOff.top)) + "px"; + display.inputDiv.style.left = Math.max(0, Math.min(display.wrapper.clientWidth - 10, + headPos.left + lineOff.left - wrapOff.left)) + "px"; + } + } + + // No selection, plain cursor + function updateSelectionCursor(cm) { + var display = cm.display, pos = cursorCoords(cm, cm.doc.sel.head, "div"); + display.cursor.style.left = pos.left + "px"; + display.cursor.style.top = pos.top + "px"; + display.cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px"; + display.cursor.style.display = ""; + + if (pos.other) { + display.otherCursor.style.display = ""; + display.otherCursor.style.left = pos.other.left + "px"; + display.otherCursor.style.top = pos.other.top + "px"; + display.otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px"; + } else { display.otherCursor.style.display = "none"; } + } + + // Highlight selection + function updateSelectionRange(cm) { + var display = cm.display, doc = cm.doc, sel = cm.doc.sel; + var fragment = document.createDocumentFragment(); + var clientWidth = display.lineSpace.offsetWidth, pl = paddingLeft(cm.display); + + function add(left, top, width, bottom) { + if (top < 0) top = 0; + fragment.appendChild(elt("div", null, "CodeMirror-selected", "position: absolute; left: " + left + + "px; top: " + top + "px; width: " + (width == null ? clientWidth - left : width) + + "px; height: " + (bottom - top) + "px")); + } + + function drawForLine(line, fromArg, toArg) { + var lineObj = getLine(doc, line); + var lineLen = lineObj.text.length; + var start, end; + function coords(ch, bias) { + return charCoords(cm, Pos(line, ch), "div", lineObj, bias); + } + + iterateBidiSections(getOrder(lineObj), fromArg || 0, toArg == null ? lineLen : toArg, function(from, to, dir) { + var leftPos = coords(from, "left"), rightPos, left, right; + if (from == to) { + rightPos = leftPos; + left = right = leftPos.left; + } else { + rightPos = coords(to - 1, "right"); + if (dir == "rtl") { var tmp = leftPos; leftPos = rightPos; rightPos = tmp; } + left = leftPos.left; + right = rightPos.right; + } + if (fromArg == null && from == 0) left = pl; + if (rightPos.top - leftPos.top > 3) { // Different lines, draw top part + add(left, leftPos.top, null, leftPos.bottom); + left = pl; + if (leftPos.bottom < rightPos.top) add(left, leftPos.bottom, null, rightPos.top); + } + if (toArg == null && to == lineLen) right = clientWidth; + if (!start || leftPos.top < start.top || leftPos.top == start.top && leftPos.left < start.left) + start = leftPos; + if (!end || rightPos.bottom > end.bottom || rightPos.bottom == end.bottom && rightPos.right > end.right) + end = rightPos; + if (left < pl + 1) left = pl; + add(left, rightPos.top, right - left, rightPos.bottom); + }); + return {start: start, end: end}; + } + + if (sel.from.line == sel.to.line) { + drawForLine(sel.from.line, sel.from.ch, sel.to.ch); + } else { + var fromLine = getLine(doc, sel.from.line), toLine = getLine(doc, sel.to.line); + var singleVLine = visualLine(doc, fromLine) == visualLine(doc, toLine); + var leftEnd = drawForLine(sel.from.line, sel.from.ch, singleVLine ? fromLine.text.length : null).end; + var rightStart = drawForLine(sel.to.line, singleVLine ? 0 : null, sel.to.ch).start; + if (singleVLine) { + if (leftEnd.top < rightStart.top - 2) { + add(leftEnd.right, leftEnd.top, null, leftEnd.bottom); + add(pl, rightStart.top, rightStart.left, rightStart.bottom); + } else { + add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftEnd.bottom); + } + } + if (leftEnd.bottom < rightStart.top) + add(pl, leftEnd.bottom, null, rightStart.top); + } + + removeChildrenAndAdd(display.selectionDiv, fragment); + display.selectionDiv.style.display = ""; + } + + // Cursor-blinking + function restartBlink(cm) { + if (!cm.state.focused) return; + var display = cm.display; + clearInterval(display.blinker); + var on = true; + display.cursor.style.visibility = display.otherCursor.style.visibility = ""; + display.blinker = setInterval(function() { + display.cursor.style.visibility = display.otherCursor.style.visibility = (on = !on) ? "" : "hidden"; + }, cm.options.cursorBlinkRate); + } + + // HIGHLIGHT WORKER + + function startWorker(cm, time) { + if (cm.doc.mode.startState && cm.doc.frontier < cm.display.showingTo) + cm.state.highlight.set(time, bind(highlightWorker, cm)); + } + + function highlightWorker(cm) { + var doc = cm.doc; + if (doc.frontier < doc.first) doc.frontier = doc.first; + if (doc.frontier >= cm.display.showingTo) return; + var end = +new Date + cm.options.workTime; + var state = copyState(doc.mode, getStateBefore(cm, doc.frontier)); + var changed = [], prevChange; + doc.iter(doc.frontier, Math.min(doc.first + doc.size, cm.display.showingTo + 500), function(line) { + if (doc.frontier >= cm.display.showingFrom) { // Visible + var oldStyles = line.styles; + line.styles = highlightLine(cm, line, state); + var ischange = !oldStyles || oldStyles.length != line.styles.length; + for (var i = 0; !ischange && i < oldStyles.length; ++i) ischange = oldStyles[i] != line.styles[i]; + if (ischange) { + if (prevChange && prevChange.end == doc.frontier) prevChange.end++; + else changed.push(prevChange = {start: doc.frontier, end: doc.frontier + 1}); + } + line.stateAfter = copyState(doc.mode, state); + } else { + processLine(cm, line, state); + line.stateAfter = doc.frontier % 5 == 0 ? copyState(doc.mode, state) : null; + } + ++doc.frontier; + if (+new Date > end) { + startWorker(cm, cm.options.workDelay); + return true; + } + }); + if (changed.length) + operation(cm, function() { + for (var i = 0; i < changed.length; ++i) + regChange(this, changed[i].start, changed[i].end); + })(); + } + + // Finds the line to start with when starting a parse. Tries to + // find a line with a stateAfter, so that it can start with a + // valid state. If that fails, it returns the line with the + // smallest indentation, which tends to need the least context to + // parse correctly. + function findStartLine(cm, n, precise) { + var minindent, minline, doc = cm.doc; + for (var search = n, lim = n - 100; search > lim; --search) { + if (search <= doc.first) return doc.first; + var line = getLine(doc, search - 1); + if (line.stateAfter && (!precise || search <= doc.frontier)) return search; + var indented = countColumn(line.text, null, cm.options.tabSize); + if (minline == null || minindent > indented) { + minline = search - 1; + minindent = indented; + } + } + return minline; + } + + function getStateBefore(cm, n, precise) { + var doc = cm.doc, display = cm.display; + if (!doc.mode.startState) return true; + var pos = findStartLine(cm, n, precise), state = pos > doc.first && getLine(doc, pos-1).stateAfter; + if (!state) state = startState(doc.mode); + else state = copyState(doc.mode, state); + doc.iter(pos, n, function(line) { + processLine(cm, line, state); + var save = pos == n - 1 || pos % 5 == 0 || pos >= display.showingFrom && pos < display.showingTo; + line.stateAfter = save ? copyState(doc.mode, state) : null; + ++pos; + }); + return state; + } + + // POSITION MEASUREMENT + + function paddingTop(display) {return display.lineSpace.offsetTop;} + function paddingVert(display) {return display.mover.offsetHeight - display.lineSpace.offsetHeight;} + function paddingLeft(display) { + var e = removeChildrenAndAdd(display.measure, elt("pre", null, null, "text-align: left")).appendChild(elt("span", "x")); + return e.offsetLeft; + } + + function measureChar(cm, line, ch, data, bias) { + var dir = -1; + data = data || measureLine(cm, line); + + for (var pos = ch;; pos += dir) { + var r = data[pos]; + if (r) break; + if (dir < 0 && pos == 0) dir = 1; + } + bias = pos > ch ? "left" : pos < ch ? "right" : bias; + if (bias == "left" && r.leftSide) r = r.leftSide; + else if (bias == "right" && r.rightSide) r = r.rightSide; + return {left: pos < ch ? r.right : r.left, + right: pos > ch ? r.left : r.right, + top: r.top, + bottom: r.bottom}; + } + + function findCachedMeasurement(cm, line) { + var cache = cm.display.measureLineCache; + for (var i = 0; i < cache.length; ++i) { + var memo = cache[i]; + if (memo.text == line.text && memo.markedSpans == line.markedSpans && + cm.display.scroller.clientWidth == memo.width && + memo.classes == line.textClass + "|" + line.bgClass + "|" + line.wrapClass) + return memo; + } + } + + function clearCachedMeasurement(cm, line) { + var exists = findCachedMeasurement(cm, line); + if (exists) exists.text = exists.measure = exists.markedSpans = null; + } + + function measureLine(cm, line) { + // First look in the cache + var cached = findCachedMeasurement(cm, line); + if (cached) return cached.measure; + + // Failing that, recompute and store result in cache + var measure = measureLineInner(cm, line); + var cache = cm.display.measureLineCache; + var memo = {text: line.text, width: cm.display.scroller.clientWidth, + markedSpans: line.markedSpans, measure: measure, + classes: line.textClass + "|" + line.bgClass + "|" + line.wrapClass}; + if (cache.length == 16) cache[++cm.display.measureLineCachePos % 16] = memo; + else cache.push(memo); + return measure; + } + + function measureLineInner(cm, line) { + var display = cm.display, measure = emptyArray(line.text.length); + var pre = lineContent(cm, line, measure, true); + + // IE does not cache element positions of inline elements between + // calls to getBoundingClientRect. This makes the loop below, + // which gathers the positions of all the characters on the line, + // do an amount of layout work quadratic to the number of + // characters. When line wrapping is off, we try to improve things + // by first subdividing the line into a bunch of inline blocks, so + // that IE can reuse most of the layout information from caches + // for those blocks. This does interfere with line wrapping, so it + // doesn't work when wrapping is on, but in that case the + // situation is slightly better, since IE does cache line-wrapping + // information and only recomputes per-line. + if (ie && !ie_lt8 && !cm.options.lineWrapping && pre.childNodes.length > 100) { + var fragment = document.createDocumentFragment(); + var chunk = 10, n = pre.childNodes.length; + for (var i = 0, chunks = Math.ceil(n / chunk); i < chunks; ++i) { + var wrap = elt("div", null, null, "display: inline-block"); + for (var j = 0; j < chunk && n; ++j) { + wrap.appendChild(pre.firstChild); + --n; + } + fragment.appendChild(wrap); + } + pre.appendChild(fragment); + } + + removeChildrenAndAdd(display.measure, pre); + + var outer = getRect(display.lineDiv); + var vranges = [], data = emptyArray(line.text.length), maxBot = pre.offsetHeight; + // Work around an IE7/8 bug where it will sometimes have randomly + // replaced our pre with a clone at this point. + if (ie_lt9 && display.measure.first != pre) + removeChildrenAndAdd(display.measure, pre); + + function measureRect(rect) { + var top = rect.top - outer.top, bot = rect.bottom - outer.top; + if (bot > maxBot) bot = maxBot; + if (top < 0) top = 0; + for (var i = vranges.length - 2; i >= 0; i -= 2) { + var rtop = vranges[i], rbot = vranges[i+1]; + if (rtop > bot || rbot < top) continue; + if (rtop <= top && rbot >= bot || + top <= rtop && bot >= rbot || + Math.min(bot, rbot) - Math.max(top, rtop) >= (bot - top) >> 1) { + vranges[i] = Math.min(top, rtop); + vranges[i+1] = Math.max(bot, rbot); + break; + } + } + if (i < 0) { i = vranges.length; vranges.push(top, bot); } + return {left: rect.left - outer.left, + right: rect.right - outer.left, + top: i, bottom: null}; + } + function finishRect(rect) { + rect.bottom = vranges[rect.top+1]; + rect.top = vranges[rect.top]; + } + + for (var i = 0, cur; i < measure.length; ++i) if (cur = measure[i]) { + var node = cur, rect = null; + // A widget might wrap, needs special care + if (/\bCodeMirror-widget\b/.test(cur.className) && cur.getClientRects) { + if (cur.firstChild.nodeType == 1) node = cur.firstChild; + var rects = node.getClientRects(); + if (rects.length > 1) { + rect = data[i] = measureRect(rects[0]); + rect.rightSide = measureRect(rects[rects.length - 1]); + } + } + if (!rect) rect = data[i] = measureRect(getRect(node)); + if (cur.measureRight) rect.right = getRect(cur.measureRight).left; + if (cur.leftSide) rect.leftSide = measureRect(getRect(cur.leftSide)); + } + for (var i = 0, cur; i < data.length; ++i) if (cur = data[i]) { + finishRect(cur); + if (cur.leftSide) finishRect(cur.leftSide); + if (cur.rightSide) finishRect(cur.rightSide); + } + return data; + } + + function measureLineWidth(cm, line) { + var hasBadSpan = false; + if (line.markedSpans) for (var i = 0; i < line.markedSpans; ++i) { + var sp = line.markedSpans[i]; + if (sp.collapsed && (sp.to == null || sp.to == line.text.length)) hasBadSpan = true; + } + var cached = !hasBadSpan && findCachedMeasurement(cm, line); + if (cached) return measureChar(cm, line, line.text.length, cached.measure, "right").right; + + var pre = lineContent(cm, line, null, true); + var end = pre.appendChild(zeroWidthElement(cm.display.measure)); + removeChildrenAndAdd(cm.display.measure, pre); + return getRect(end).right - getRect(cm.display.lineDiv).left; + } + + function clearCaches(cm) { + cm.display.measureLineCache.length = cm.display.measureLineCachePos = 0; + cm.display.cachedCharWidth = cm.display.cachedTextHeight = null; + if (!cm.options.lineWrapping) cm.display.maxLineChanged = true; + cm.display.lineNumChars = null; + } + + function pageScrollX() { return window.pageXOffset || (document.documentElement || document.body).scrollLeft; } + function pageScrollY() { return window.pageYOffset || (document.documentElement || document.body).scrollTop; } + + // Context is one of "line", "div" (display.lineDiv), "local"/null (editor), or "page" + function intoCoordSystem(cm, lineObj, rect, context) { + if (lineObj.widgets) for (var i = 0; i < lineObj.widgets.length; ++i) if (lineObj.widgets[i].above) { + var size = widgetHeight(lineObj.widgets[i]); + rect.top += size; rect.bottom += size; + } + if (context == "line") return rect; + if (!context) context = "local"; + var yOff = heightAtLine(cm, lineObj); + if (context == "local") yOff += paddingTop(cm.display); + else yOff -= cm.display.viewOffset; + if (context == "page" || context == "window") { + var lOff = getRect(cm.display.lineSpace); + yOff += lOff.top + (context == "window" ? 0 : pageScrollY()); + var xOff = lOff.left + (context == "window" ? 0 : pageScrollX()); + rect.left += xOff; rect.right += xOff; + } + rect.top += yOff; rect.bottom += yOff; + return rect; + } + + // Context may be "window", "page", "div", or "local"/null + // Result is in "div" coords + function fromCoordSystem(cm, coords, context) { + if (context == "div") return coords; + var left = coords.left, top = coords.top; + // First move into "page" coordinate system + if (context == "page") { + left -= pageScrollX(); + top -= pageScrollY(); + } else if (context == "local" || !context) { + var localBox = getRect(cm.display.sizer); + left += localBox.left; + top += localBox.top; + } + + var lineSpaceBox = getRect(cm.display.lineSpace); + return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top}; + } + + function charCoords(cm, pos, context, lineObj, bias) { + if (!lineObj) lineObj = getLine(cm.doc, pos.line); + return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch, null, bias), context); + } + + function cursorCoords(cm, pos, context, lineObj, measurement) { + lineObj = lineObj || getLine(cm.doc, pos.line); + if (!measurement) measurement = measureLine(cm, lineObj); + function get(ch, right) { + var m = measureChar(cm, lineObj, ch, measurement, right ? "right" : "left"); + if (right) m.left = m.right; else m.right = m.left; + return intoCoordSystem(cm, lineObj, m, context); + } + function getBidi(ch, partPos) { + var part = order[partPos], right = part.level % 2; + if (ch == bidiLeft(part) && partPos && part.level < order[partPos - 1].level) { + part = order[--partPos]; + ch = bidiRight(part) - (part.level % 2 ? 0 : 1); + right = true; + } else if (ch == bidiRight(part) && partPos < order.length - 1 && part.level < order[partPos + 1].level) { + part = order[++partPos]; + ch = bidiLeft(part) - part.level % 2; + right = false; + } + if (right && ch == part.to && ch > part.from) return get(ch - 1); + return get(ch, right); + } + var order = getOrder(lineObj), ch = pos.ch; + if (!order) return get(ch); + var partPos = getBidiPartAt(order, ch); + var val = getBidi(ch, partPos); + if (bidiOther != null) val.other = getBidi(ch, bidiOther); + return val; + } + + function PosWithInfo(line, ch, outside, xRel) { + var pos = new Pos(line, ch); + pos.xRel = xRel; + if (outside) pos.outside = true; + return pos; + } + + // Coords must be lineSpace-local + function coordsChar(cm, x, y) { + var doc = cm.doc; + y += cm.display.viewOffset; + if (y < 0) return PosWithInfo(doc.first, 0, true, -1); + var lineNo = lineAtHeight(doc, y), last = doc.first + doc.size - 1; + if (lineNo > last) + return PosWithInfo(doc.first + doc.size - 1, getLine(doc, last).text.length, true, 1); + if (x < 0) x = 0; + + for (;;) { + var lineObj = getLine(doc, lineNo); + var found = coordsCharInner(cm, lineObj, lineNo, x, y); + var merged = collapsedSpanAtEnd(lineObj); + var mergedPos = merged && merged.find(); + if (merged && (found.ch > mergedPos.from.ch || found.ch == mergedPos.from.ch && found.xRel > 0)) + lineNo = mergedPos.to.line; + else + return found; + } + } + + function coordsCharInner(cm, lineObj, lineNo, x, y) { + var innerOff = y - heightAtLine(cm, lineObj); + var wrongLine = false, adjust = 2 * cm.display.wrapper.clientWidth; + var measurement = measureLine(cm, lineObj); + + function getX(ch) { + var sp = cursorCoords(cm, Pos(lineNo, ch), "line", + lineObj, measurement); + wrongLine = true; + if (innerOff > sp.bottom) return sp.left - adjust; + else if (innerOff < sp.top) return sp.left + adjust; + else wrongLine = false; + return sp.left; + } + + var bidi = getOrder(lineObj), dist = lineObj.text.length; + var from = lineLeft(lineObj), to = lineRight(lineObj); + var fromX = getX(from), fromOutside = wrongLine, toX = getX(to), toOutside = wrongLine; + + if (x > toX) return PosWithInfo(lineNo, to, toOutside, 1); + // Do a binary search between these bounds. + for (;;) { + if (bidi ? to == from || to == moveVisually(lineObj, from, 1) : to - from <= 1) { + var ch = x < fromX || x - fromX <= toX - x ? from : to; + var xDiff = x - (ch == from ? fromX : toX); + while (isExtendingChar.test(lineObj.text.charAt(ch))) ++ch; + var pos = PosWithInfo(lineNo, ch, ch == from ? fromOutside : toOutside, + xDiff < 0 ? -1 : xDiff ? 1 : 0); + return pos; + } + var step = Math.ceil(dist / 2), middle = from + step; + if (bidi) { + middle = from; + for (var i = 0; i < step; ++i) middle = moveVisually(lineObj, middle, 1); + } + var middleX = getX(middle); + if (middleX > x) {to = middle; toX = middleX; if (toOutside = wrongLine) toX += 1000; dist = step;} + else {from = middle; fromX = middleX; fromOutside = wrongLine; dist -= step;} + } + } + + var measureText; + function textHeight(display) { + if (display.cachedTextHeight != null) return display.cachedTextHeight; + if (measureText == null) { + measureText = elt("pre"); + // Measure a bunch of lines, for browsers that compute + // fractional heights. + for (var i = 0; i < 49; ++i) { + measureText.appendChild(document.createTextNode("x")); + measureText.appendChild(elt("br")); + } + measureText.appendChild(document.createTextNode("x")); + } + removeChildrenAndAdd(display.measure, measureText); + var height = measureText.offsetHeight / 50; + if (height > 3) display.cachedTextHeight = height; + removeChildren(display.measure); + return height || 1; + } + + function charWidth(display) { + if (display.cachedCharWidth != null) return display.cachedCharWidth; + var anchor = elt("span", "x"); + var pre = elt("pre", [anchor]); + removeChildrenAndAdd(display.measure, pre); + var width = anchor.offsetWidth; + if (width > 2) display.cachedCharWidth = width; + return width || 10; + } + + // OPERATIONS + + // Operations are used to wrap changes in such a way that each + // change won't have to update the cursor and display (which would + // be awkward, slow, and error-prone), but instead updates are + // batched and then all combined and executed at once. + + var nextOpId = 0; + function startOperation(cm) { + cm.curOp = { + // An array of ranges of lines that have to be updated. See + // updateDisplay. + changes: [], + forceUpdate: false, + updateInput: null, + userSelChange: null, + textChanged: null, + selectionChanged: false, + cursorActivity: false, + updateMaxLine: false, + updateScrollPos: false, + id: ++nextOpId + }; + if (!delayedCallbackDepth++) delayedCallbacks = []; + } + + function endOperation(cm) { + var op = cm.curOp, doc = cm.doc, display = cm.display; + cm.curOp = null; + + if (op.updateMaxLine) computeMaxLength(cm); + if (display.maxLineChanged && !cm.options.lineWrapping && display.maxLine) { + var width = measureLineWidth(cm, display.maxLine); + display.sizer.style.minWidth = Math.max(0, width + 3 + scrollerCutOff) + "px"; + display.maxLineChanged = false; + var maxScrollLeft = Math.max(0, display.sizer.offsetLeft + display.sizer.offsetWidth - display.scroller.clientWidth); + if (maxScrollLeft < doc.scrollLeft && !op.updateScrollPos) + setScrollLeft(cm, Math.min(display.scroller.scrollLeft, maxScrollLeft), true); + } + var newScrollPos, updated; + if (op.updateScrollPos) { + newScrollPos = op.updateScrollPos; + } else if (op.selectionChanged && display.scroller.clientHeight) { // don't rescroll if not visible + var coords = cursorCoords(cm, doc.sel.head); + newScrollPos = calculateScrollPos(cm, coords.left, coords.top, coords.left, coords.bottom); + } + if (op.changes.length || op.forceUpdate || newScrollPos && newScrollPos.scrollTop != null) { + updated = updateDisplay(cm, op.changes, newScrollPos && newScrollPos.scrollTop, op.forceUpdate); + if (cm.display.scroller.offsetHeight) cm.doc.scrollTop = cm.display.scroller.scrollTop; + } + if (!updated && op.selectionChanged) updateSelection(cm); + if (op.updateScrollPos) { + display.scroller.scrollTop = display.scrollbarV.scrollTop = doc.scrollTop = newScrollPos.scrollTop; + display.scroller.scrollLeft = display.scrollbarH.scrollLeft = doc.scrollLeft = newScrollPos.scrollLeft; + alignHorizontally(cm); + if (op.scrollToPos) + scrollPosIntoView(cm, clipPos(cm.doc, op.scrollToPos), op.scrollToPosMargin); + } else if (newScrollPos) { + scrollCursorIntoView(cm); + } + if (op.selectionChanged) restartBlink(cm); + + if (cm.state.focused && op.updateInput) + resetInput(cm, op.userSelChange); + + var hidden = op.maybeHiddenMarkers, unhidden = op.maybeUnhiddenMarkers; + if (hidden) for (var i = 0; i < hidden.length; ++i) + if (!hidden[i].lines.length) signal(hidden[i], "hide"); + if (unhidden) for (var i = 0; i < unhidden.length; ++i) + if (unhidden[i].lines.length) signal(unhidden[i], "unhide"); + + var delayed; + if (!--delayedCallbackDepth) { + delayed = delayedCallbacks; + delayedCallbacks = null; + } + if (op.textChanged) + signal(cm, "change", cm, op.textChanged); + if (op.cursorActivity) signal(cm, "cursorActivity", cm); + if (delayed) for (var i = 0; i < delayed.length; ++i) delayed[i](); + } + + // Wraps a function in an operation. Returns the wrapped function. + function operation(cm1, f) { + return function() { + var cm = cm1 || this, withOp = !cm.curOp; + if (withOp) startOperation(cm); + try { var result = f.apply(cm, arguments); } + finally { if (withOp) endOperation(cm); } + return result; + }; + } + function docOperation(f) { + return function() { + var withOp = this.cm && !this.cm.curOp, result; + if (withOp) startOperation(this.cm); + try { result = f.apply(this, arguments); } + finally { if (withOp) endOperation(this.cm); } + return result; + }; + } + function runInOp(cm, f) { + var withOp = !cm.curOp, result; + if (withOp) startOperation(cm); + try { result = f(); } + finally { if (withOp) endOperation(cm); } + return result; + } + + function regChange(cm, from, to, lendiff) { + if (from == null) from = cm.doc.first; + if (to == null) to = cm.doc.first + cm.doc.size; + cm.curOp.changes.push({from: from, to: to, diff: lendiff}); + } + + // INPUT HANDLING + + function slowPoll(cm) { + if (cm.display.pollingFast) return; + cm.display.poll.set(cm.options.pollInterval, function() { + readInput(cm); + if (cm.state.focused) slowPoll(cm); + }); + } + + function fastPoll(cm) { + var missed = false; + cm.display.pollingFast = true; + function p() { + var changed = readInput(cm); + if (!changed && !missed) {missed = true; cm.display.poll.set(60, p);} + else {cm.display.pollingFast = false; slowPoll(cm);} + } + cm.display.poll.set(20, p); + } + + // prevInput is a hack to work with IME. If we reset the textarea + // on every change, that breaks IME. So we look for changes + // compared to the previous content instead. (Modern browsers have + // events that indicate IME taking place, but these are not widely + // supported or compatible enough yet to rely on.) + function readInput(cm) { + var input = cm.display.input, prevInput = cm.display.prevInput, doc = cm.doc, sel = doc.sel; + if (!cm.state.focused || hasSelection(input) || isReadOnly(cm) || cm.state.disableInput || cm.state.accessibleTextareaWaiting) return false; + var text = input.value; + if (text == prevInput && posEq(sel.from, sel.to)) return false; + if (ie && !ie_lt9 && cm.display.inputHasSelection === text) { + resetInput(cm, true); + return false; + } + + var withOp = !cm.curOp; + if (withOp) startOperation(cm); + sel.shift = false; + var same = 0, l = Math.min(prevInput.length, text.length); + while (same < l && prevInput.charCodeAt(same) == text.charCodeAt(same)) ++same; + var from = sel.from, to = sel.to; + if (same < prevInput.length) + from = Pos(from.line, from.ch - (prevInput.length - same)); + else if (cm.state.overwrite && posEq(from, to) && !cm.state.pasteIncoming) + to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + (text.length - same))); + + var updateInput = cm.curOp.updateInput; + var changeEvent = {from: from, to: to, text: splitLines(text.slice(same)), + origin: cm.state.pasteIncoming ? "paste" : "+input"}; + makeChange(cm.doc, changeEvent, "end"); + cm.curOp.updateInput = updateInput; + signalLater(cm, "inputRead", cm, changeEvent); + + if (text.length > 1000 || text.indexOf("\n") > -1) input.value = cm.display.prevInput = ""; + else cm.display.prevInput = text; + if (withOp) endOperation(cm); + cm.state.pasteIncoming = false; + return true; + } + + function resetInput(cm, user) { + var minimal, selected, doc = cm.doc; + if (!posEq(doc.sel.from, doc.sel.to)) { + cm.display.prevInput = ""; + minimal = false && hasCopyEvent && + (doc.sel.to.line - doc.sel.from.line > 100 || (selected = cm.getSelection()).length > 1000); + var content = minimal ? "-" : selected || cm.getSelection(); + cm.display.input.value = content; + if (cm.state.focused) selectInput(cm.display.input); + if (ie && !ie_lt9) cm.display.inputHasSelection = content; + } else if (user && !cm.state.accessibleTextareaWaiting) { + cm.display.prevInput = cm.display.input.value = ""; + if (ie && !ie_lt9) cm.display.inputHasSelection = null; + } + cm.display.inaccurateSelection = minimal; + } + + function focusInput(cm) { + if (cm.options.readOnly != "nocursor" && (!mobile || document.activeElement != cm.display.input)) + cm.display.input.focus(); + } + + function isReadOnly(cm) { + return cm.options.readOnly || cm.doc.cantEdit; + } + + // EVENT HANDLERS + + function registerEventHandlers(cm) { + var d = cm.display; + on(d.scroller, "mousedown", operation(cm, onMouseDown)); + if (ie) + on(d.scroller, "dblclick", operation(cm, function(e) { + if (signalDOMEvent(cm, e)) return; + var pos = posFromMouse(cm, e); + if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) return; + e_preventDefault(e); + var word = findWordAt(getLine(cm.doc, pos.line).text, pos); + extendSelection(cm.doc, word.from, word.to); + })); + else + on(d.scroller, "dblclick", function(e) { signalDOMEvent(cm, e) || e_preventDefault(e); }); + on(d.lineSpace, "selectstart", function(e) { + if (!eventInWidget(d, e)) e_preventDefault(e); + }); + // Gecko browsers fire contextmenu *after* opening the menu, at + // which point we can't mess with it anymore. Context menu is + // handled in onMouseDown for Gecko. + if (!captureMiddleClick) on(d.scroller, "contextmenu", function(e) {onContextMenu(cm, e);}); + + on(d.scroller, "scroll", function() { + if (d.scroller.clientHeight) { + setScrollTop(cm, d.scroller.scrollTop); + setScrollLeft(cm, d.scroller.scrollLeft, true); + signal(cm, "scroll", cm); + } + }); + on(d.scrollbarV, "scroll", function() { + if (d.scroller.clientHeight) setScrollTop(cm, d.scrollbarV.scrollTop); + }); + on(d.scrollbarH, "scroll", function() { + if (d.scroller.clientHeight) setScrollLeft(cm, d.scrollbarH.scrollLeft); + }); + + on(d.scroller, "mousewheel", function(e){onScrollWheel(cm, e);}); + on(d.scroller, "DOMMouseScroll", function(e){onScrollWheel(cm, e);}); + + function reFocus() { if (cm.state.focused) setTimeout(bind(focusInput, cm), 0); } + on(d.scrollbarH, "mousedown", reFocus); + on(d.scrollbarV, "mousedown", reFocus); + // Prevent wrapper from ever scrolling + on(d.wrapper, "scroll", function() { d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; }); + + var resizeTimer; + function onResize() { + if (resizeTimer == null) resizeTimer = setTimeout(function() { + resizeTimer = null; + // Might be a text scaling operation, clear size caches. + d.cachedCharWidth = d.cachedTextHeight = knownScrollbarWidth = null; + clearCaches(cm); + runInOp(cm, bind(regChange, cm)); + }, 100); + } + on(window, "resize", onResize); + // Above handler holds on to the editor and its data structures. + // Here we poll to unregister it when the editor is no longer in + // the document, so that it can be garbage-collected. + function unregister() { + for (var p = d.wrapper.parentNode; p && p != document.body; p = p.parentNode) {} + if (p) setTimeout(unregister, 5000); + else off(window, "resize", onResize); + } + setTimeout(unregister, 5000); + + on(d.input, "keyup", operation(cm, function(e) { + if (signalDOMEvent(cm, e) || cm.options.onKeyEvent && cm.options.onKeyEvent(cm, addStop(e))) return; + if (e.keyCode == 16) cm.doc.sel.shift = false; + })); + on(d.input, "input", bind(fastPoll, cm)); + on(d.input, "keydown", operation(cm, onKeyDown)); + on(d.input, "keypress", operation(cm, onKeyPress)); + on(d.input, "focus", bind(onFocus, cm)); + on(d.input, "blur", bind(onBlur, cm)); + + function drag_(e) { + if (signalDOMEvent(cm, e) || cm.options.onDragEvent && cm.options.onDragEvent(cm, addStop(e))) return; + e_stop(e); + } + if (cm.options.dragDrop) { + on(d.scroller, "dragstart", function(e){onDragStart(cm, e);}); + on(d.scroller, "dragenter", drag_); + on(d.scroller, "dragover", drag_); + on(d.scroller, "drop", operation(cm, onDrop)); + } + on(d.scroller, "paste", function(e){ + if (eventInWidget(d, e)) return; + focusInput(cm); + fastPoll(cm); + }); + on(d.input, "paste", function() { + cm.state.pasteIncoming = true; + fastPoll(cm); + }); + + function prepareCopy() { + if (d.inaccurateSelection) { + d.prevInput = ""; + d.inaccurateSelection = false; + d.input.value = cm.getSelection(); + selectInput(d.input); + } + } + on(d.input, "cut", prepareCopy); + on(d.input, "copy", prepareCopy); + + // Needed to handle Tab key in KHTML + if (khtml) on(d.sizer, "mouseup", function() { + if (document.activeElement == d.input) d.input.blur(); + focusInput(cm); + }); + } + + function eventInWidget(display, e) { + for (var n = e_target(e); n != display.wrapper; n = n.parentNode) { + if (!n || n.ignoreEvents || n.parentNode == display.sizer && n != display.mover) return true; + } + } + + function posFromMouse(cm, e, liberal) { + var display = cm.display; + if (!liberal) { + var target = e_target(e); + if (target == display.scrollbarH || target == display.scrollbarH.firstChild || + target == display.scrollbarV || target == display.scrollbarV.firstChild || + target == display.scrollbarFiller || target == display.gutterFiller) return null; + } + var x, y, space = getRect(display.lineSpace); + // Fails unpredictably on IE[67] when mouse is dragged around quickly. + try { x = e.clientX; y = e.clientY; } catch (e) { return null; } + return coordsChar(cm, x - space.left, y - space.top); + } + + var lastClick, lastDoubleClick; + function onMouseDown(e) { + if (signalDOMEvent(this, e)) return; + var cm = this, display = cm.display, doc = cm.doc, sel = doc.sel; + sel.shift = e.shiftKey; + + if (eventInWidget(display, e)) { + if (!webkit) { + display.scroller.draggable = false; + setTimeout(function(){display.scroller.draggable = true;}, 100); + } + return; + } + if (clickInGutter(cm, e)) return; + var start = posFromMouse(cm, e); + + switch (e_button(e)) { + case 3: + if (captureMiddleClick) onContextMenu.call(cm, cm, e); + return; + case 2: + if (start) extendSelection(cm.doc, start); + setTimeout(bind(focusInput, cm), 20); + e_preventDefault(e); + return; + } + // For button 1, if it was clicked inside the editor + // (posFromMouse returning non-null), we have to adjust the + // selection. + if (!start) {if (e_target(e) == display.scroller) e_preventDefault(e); return;} + + if (!cm.state.focused) onFocus(cm); + + var now = +new Date, type = "single"; + if (lastDoubleClick && lastDoubleClick.time > now - 400 && posEq(lastDoubleClick.pos, start)) { + type = "triple"; + e_preventDefault(e); + setTimeout(bind(focusInput, cm), 20); + selectLine(cm, start.line); + } else if (lastClick && lastClick.time > now - 400 && posEq(lastClick.pos, start)) { + type = "double"; + lastDoubleClick = {time: now, pos: start}; + e_preventDefault(e); + var word = findWordAt(getLine(doc, start.line).text, start); + extendSelection(cm.doc, word.from, word.to); + } else { lastClick = {time: now, pos: start}; } + + var last = start; + if (cm.options.dragDrop && dragAndDrop && !isReadOnly(cm) && !posEq(sel.from, sel.to) && + !posLess(start, sel.from) && !posLess(sel.to, start) && type == "single") { + var dragEnd = operation(cm, function(e2) { + if (webkit) display.scroller.draggable = false; + cm.state.draggingText = false; + off(document, "mouseup", dragEnd); + off(display.scroller, "drop", dragEnd); + if (Math.abs(e.clientX - e2.clientX) + Math.abs(e.clientY - e2.clientY) < 10) { + e_preventDefault(e2); + extendSelection(cm.doc, start); + focusInput(cm); + } + }); + // Let the drag handler handle this. + if (webkit) display.scroller.draggable = true; + cm.state.draggingText = dragEnd; + // IE's approach to draggable + if (display.scroller.dragDrop) display.scroller.dragDrop(); + on(document, "mouseup", dragEnd); + on(display.scroller, "drop", dragEnd); + return; + } + e_preventDefault(e); + if (type == "single") extendSelection(cm.doc, clipPos(doc, start)); + + var startstart = sel.from, startend = sel.to, lastPos = start; + + function doSelect(cur) { + if (posEq(lastPos, cur)) return; + lastPos = cur; + + if (type == "single") { + extendSelection(cm.doc, clipPos(doc, start), cur); + return; + } + + startstart = clipPos(doc, startstart); + startend = clipPos(doc, startend); + if (type == "double") { + var word = findWordAt(getLine(doc, cur.line).text, cur); + if (posLess(cur, startstart)) extendSelection(cm.doc, word.from, startend); + else extendSelection(cm.doc, startstart, word.to); + } else if (type == "triple") { + if (posLess(cur, startstart)) extendSelection(cm.doc, startend, clipPos(doc, Pos(cur.line, 0))); + else extendSelection(cm.doc, startstart, clipPos(doc, Pos(cur.line + 1, 0))); + } + } + + var editorSize = getRect(display.wrapper); + // Used to ensure timeout re-tries don't fire when another extend + // happened in the meantime (clearTimeout isn't reliable -- at + // least on Chrome, the timeouts still happen even when cleared, + // if the clear happens after their scheduled firing time). + var counter = 0; + + function extend(e) { + var curCount = ++counter; + var cur = posFromMouse(cm, e, true); + if (!cur) return; + if (!posEq(cur, last)) { + if (!cm.state.focused) onFocus(cm); + last = cur; + doSelect(cur); + var visible = visibleLines(display, doc); + if (cur.line >= visible.to || cur.line < visible.from) + setTimeout(operation(cm, function(){if (counter == curCount) extend(e);}), 150); + } else { + var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0; + if (outside) setTimeout(operation(cm, function() { + if (counter != curCount) return; + display.scroller.scrollTop += outside; + extend(e); + }), 50); + } + } + + function done(e) { + counter = Infinity; + e_preventDefault(e); + focusInput(cm); + off(document, "mousemove", move); + off(document, "mouseup", up); + } + + var move = operation(cm, function(e) { + if (!ie && !e_button(e)) done(e); + else extend(e); + }); + var up = operation(cm, done); + on(document, "mousemove", move); + on(document, "mouseup", up); + } + + function clickInGutter(cm, e) { + var display = cm.display; + try { var mX = e.clientX, mY = e.clientY; } + catch(e) { return false; } + + if (mX >= Math.floor(getRect(display.gutters).right)) return false; + e_preventDefault(e); + if (!hasHandler(cm, "gutterClick")) return true; + + var lineBox = getRect(display.lineDiv); + if (mY > lineBox.bottom) return true; + mY -= lineBox.top - display.viewOffset; + + for (var i = 0; i < cm.options.gutters.length; ++i) { + var g = display.gutters.childNodes[i]; + if (g && getRect(g).right >= mX) { + var line = lineAtHeight(cm.doc, mY); + var gutter = cm.options.gutters[i]; + signalLater(cm, "gutterClick", cm, line, gutter, e); + break; + } + } + return true; + } + + // Kludge to work around strange IE behavior where it'll sometimes + // re-fire a series of drag-related events right after the drop (#1551) + var lastDrop = 0; + + function onDrop(e) { + var cm = this; + if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e) || (cm.options.onDragEvent && cm.options.onDragEvent(cm, addStop(e)))) + return; + e_preventDefault(e); + if (ie) lastDrop = +new Date; + var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files; + if (!pos || isReadOnly(cm)) return; + if (files && files.length && window.FileReader && window.File) { + var n = files.length, text = Array(n), read = 0; + var loadFile = function(file, i) { + var reader = new FileReader; + reader.onload = function() { + text[i] = reader.result; + if (++read == n) { + pos = clipPos(cm.doc, pos); + makeChange(cm.doc, {from: pos, to: pos, text: splitLines(text.join("\n")), origin: "paste"}, "around"); + } + }; + reader.readAsText(file); + }; + for (var i = 0; i < n; ++i) loadFile(files[i], i); + } else { + // Don't do a replace if the drop happened inside of the selected text. + if (cm.state.draggingText && !(posLess(pos, cm.doc.sel.from) || posLess(cm.doc.sel.to, pos))) { + cm.state.draggingText(e); + // Ensure the editor is re-focused + setTimeout(bind(focusInput, cm), 20); + return; + } + try { + var text = e.dataTransfer.getData("Text"); + if (text) { + var curFrom = cm.doc.sel.from, curTo = cm.doc.sel.to; + setSelection(cm.doc, pos, pos); + if (cm.state.draggingText) replaceRange(cm.doc, "", curFrom, curTo, "paste"); + cm.replaceSelection(text, null, "paste"); + focusInput(cm); + onFocus(cm); + } + } + catch(e){} + } + } + + function onDragStart(cm, e) { + if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return; } + if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) return; + + var txt = cm.getSelection(); + e.dataTransfer.setData("Text", txt); + + // Use dummy image instead of default browsers image. + // Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there. + if (e.dataTransfer.setDragImage && !safari) { + var img = elt("img", null, null, "position: fixed; left: 0; top: 0;"); + if (opera) { + img.width = img.height = 1; + cm.display.wrapper.appendChild(img); + // Force a relayout, or Opera won't use our image for some obscure reason + img._top = img.offsetTop; + } + e.dataTransfer.setDragImage(img, 0, 0); + if (opera) img.parentNode.removeChild(img); + } + } + + function setScrollTop(cm, val) { + if (Math.abs(cm.doc.scrollTop - val) < 2) return; + cm.doc.scrollTop = val; + if (!gecko) updateDisplay(cm, [], val); + if (cm.display.scroller.scrollTop != val) cm.display.scroller.scrollTop = val; + if (cm.display.scrollbarV.scrollTop != val) cm.display.scrollbarV.scrollTop = val; + if (gecko) updateDisplay(cm, []); + startWorker(cm, 100); + } + function setScrollLeft(cm, val, isScroller) { + if (isScroller ? val == cm.doc.scrollLeft : Math.abs(cm.doc.scrollLeft - val) < 2) return; + val = Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.clientWidth); + cm.doc.scrollLeft = val; + alignHorizontally(cm); + if (cm.display.scroller.scrollLeft != val) cm.display.scroller.scrollLeft = val; + if (cm.display.scrollbarH.scrollLeft != val) cm.display.scrollbarH.scrollLeft = val; + } + + // Since the delta values reported on mouse wheel events are + // unstandardized between browsers and even browser versions, and + // generally horribly unpredictable, this code starts by measuring + // the scroll effect that the first few mouse wheel events have, + // and, from that, detects the way it can convert deltas to pixel + // offsets afterwards. + // + // The reason we want to know the amount a wheel event will scroll + // is that it gives us a chance to update the display before the + // actual scrolling happens, reducing flickering. + + var wheelSamples = 0, wheelPixelsPerUnit = null; + // Fill in a browser-detected starting value on browsers where we + // know one. These don't have to be accurate -- the result of them + // being wrong would just be a slight flicker on the first wheel + // scroll (if it is large enough). + if (ie) wheelPixelsPerUnit = -.53; + else if (gecko) wheelPixelsPerUnit = 15; + else if (chrome) wheelPixelsPerUnit = -.7; + else if (safari) wheelPixelsPerUnit = -1/3; + + function onScrollWheel(cm, e) { + var dx = e.wheelDeltaX, dy = e.wheelDeltaY; + if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) dx = e.detail; + if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) dy = e.detail; + else if (dy == null) dy = e.wheelDelta; + + var display = cm.display, scroll = display.scroller; + // Quit if there's nothing to scroll here + if (!(dx && scroll.scrollWidth > scroll.clientWidth || + dy && scroll.scrollHeight > scroll.clientHeight)) return; + + // Webkit browsers on OS X abort momentum scrolls when the target + // of the scroll event is removed from the scrollable element. + // This hack (see related code in patchDisplay) makes sure the + // element is kept around. + if (dy && mac && webkit) { + for (var cur = e.target; cur != scroll; cur = cur.parentNode) { + if (cur.lineObj) { + cm.display.currentWheelTarget = cur; + break; + } + } + } + + // On some browsers, horizontal scrolling will cause redraws to + // happen before the gutter has been realigned, causing it to + // wriggle around in a most unseemly way. When we have an + // estimated pixels/delta value, we just handle horizontal + // scrolling entirely here. It'll be slightly off from native, but + // better than glitching out. + if (dx && !gecko && !opera && wheelPixelsPerUnit != null) { + if (dy) + setScrollTop(cm, Math.max(0, Math.min(scroll.scrollTop + dy * wheelPixelsPerUnit, scroll.scrollHeight - scroll.clientHeight))); + setScrollLeft(cm, Math.max(0, Math.min(scroll.scrollLeft + dx * wheelPixelsPerUnit, scroll.scrollWidth - scroll.clientWidth))); + e_preventDefault(e); + display.wheelStartX = null; // Abort measurement, if in progress + return; + } + + if (dy && wheelPixelsPerUnit != null) { + var pixels = dy * wheelPixelsPerUnit; + var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight; + if (pixels < 0) top = Math.max(0, top + pixels - 50); + else bot = Math.min(cm.doc.height, bot + pixels + 50); + updateDisplay(cm, [], {top: top, bottom: bot}); + } + + if (wheelSamples < 20) { + if (display.wheelStartX == null) { + display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.scrollTop; + display.wheelDX = dx; display.wheelDY = dy; + setTimeout(function() { + if (display.wheelStartX == null) return; + var movedX = scroll.scrollLeft - display.wheelStartX; + var movedY = scroll.scrollTop - display.wheelStartY; + var sample = (movedY && display.wheelDY && movedY / display.wheelDY) || + (movedX && display.wheelDX && movedX / display.wheelDX); + display.wheelStartX = display.wheelStartY = null; + if (!sample) return; + wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1); + ++wheelSamples; + }, 200); + } else { + display.wheelDX += dx; display.wheelDY += dy; + } + } + } + + function doHandleBinding(cm, bound, dropShift) { + if (typeof bound == "string") { + bound = commands[bound]; + if (!bound) return false; + } + // Ensure previous input has been read, so that the handler sees a + // consistent view of the document + if (cm.display.pollingFast && readInput(cm)) cm.display.pollingFast = false; + var doc = cm.doc, prevShift = doc.sel.shift, done = false; + try { + if (isReadOnly(cm)) cm.state.suppressEdits = true; + if (dropShift) doc.sel.shift = false; + done = bound(cm) != Pass; + } finally { + doc.sel.shift = prevShift; + cm.state.suppressEdits = false; + } + return done; + } + + function allKeyMaps(cm) { + var maps = cm.state.keyMaps.slice(0); + if (cm.options.extraKeys) maps.push(cm.options.extraKeys); + maps.push(cm.options.keyMap); + return maps; + } + + var maybeTransition; + function handleKeyBinding(cm, e) { + // Handle auto keymap transitions + var startMap = getKeyMap(cm.options.keyMap), next = startMap.auto; + clearTimeout(maybeTransition); + if (next && !isModifierKey(e)) maybeTransition = setTimeout(function() { + if (getKeyMap(cm.options.keyMap) == startMap) { + cm.options.keyMap = (next.call ? next.call(null, cm) : next); + keyMapChanged(cm); + } + }, 50); + + var name = keyName(e, true), handled = false; + if (!name) return false; + var keymaps = allKeyMaps(cm); + + if (e.shiftKey) { + // First try to resolve full name (including 'Shift-'). Failing + // that, see if there is a cursor-motion command (starting with + // 'go') bound to the keyname without 'Shift-'. + handled = lookupKey("Shift-" + name, keymaps, function(b) {return doHandleBinding(cm, b, true);}) + || lookupKey(name, keymaps, function(b) { + if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion) + return doHandleBinding(cm, b); + }); + } else { + handled = lookupKey(name, keymaps, function(b) { return doHandleBinding(cm, b); }); + } + + if (handled) { + e_preventDefault(e); + restartBlink(cm); + if (ie_lt9) { e.oldKeyCode = e.keyCode; e.keyCode = 0; } + signalLater(cm, "keyHandled", cm, name, e); + } + return handled; + } + + function handleCharBinding(cm, e, ch) { + var handled = lookupKey("'" + ch + "'", allKeyMaps(cm), + function(b) { return doHandleBinding(cm, b, true); }); + if (handled) { + e_preventDefault(e); + restartBlink(cm); + signalLater(cm, "keyHandled", cm, "'" + ch + "'", e); + } + return handled; + } + + var lastStoppedKey = null; + function onKeyDown(e) { + var cm = this; + if (!cm.state.focused) onFocus(cm); + if (ie && e.keyCode == 27) { e.returnValue = false; } + if (signalDOMEvent(cm, e) || cm.options.onKeyEvent && cm.options.onKeyEvent(cm, addStop(e))) return; + var code = e.keyCode; + // IE does strange things with escape. + cm.doc.sel.shift = code == 16 || e.shiftKey; + // First give onKeyEvent option a chance to handle this. + var handled = handleKeyBinding(cm, e); + + // On text input if value was temporaritly set for a screenreader, clear it out. + if (!handled && cm.state.accessibleTextareaWaiting) { + clearAccessibleTextarea(cm); + } + + if (opera) { + lastStoppedKey = handled ? code : null; + // Opera has no cut event... we try to at least catch the key combo + if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKey)) + cm.replaceSelection(""); + } + } + + function onKeyPress(e) { + var cm = this; + if (signalDOMEvent(cm, e) || cm.options.onKeyEvent && cm.options.onKeyEvent(cm, addStop(e))) return; + var keyCode = e.keyCode, charCode = e.charCode; + if (opera && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return;} + if (((opera && (!e.which || e.which < 10)) || khtml) && handleKeyBinding(cm, e)) return; + var ch = String.fromCharCode(charCode == null ? keyCode : charCode); + if (this.options.electricChars && this.doc.mode.electricChars && + this.options.smartIndent && !isReadOnly(this) && + this.doc.mode.electricChars.indexOf(ch) > -1) + setTimeout(operation(cm, function() {indentLine(cm, cm.doc.sel.to.line, "smart");}), 75); + if (handleCharBinding(cm, e, ch)) return; + if (ie && !ie_lt9) cm.display.inputHasSelection = null; + fastPoll(cm); + } + + function onFocus(cm) { + if (cm.options.readOnly == "nocursor") return; + if (!cm.state.focused) { + signal(cm, "focus", cm); + cm.state.focused = true; + if (cm.display.wrapper.className.search(/\bCodeMirror-focused\b/) == -1) + cm.display.wrapper.className += " CodeMirror-focused"; + resetInput(cm, true); + } + slowPoll(cm); + restartBlink(cm); + } + function onBlur(cm) { + if (cm.state.focused) { + signal(cm, "blur", cm); + cm.state.focused = false; + cm.display.wrapper.className = cm.display.wrapper.className.replace(" CodeMirror-focused", ""); + } + clearInterval(cm.display.blinker); + setTimeout(function() {if (!cm.state.focused) cm.doc.sel.shift = false;}, 150); + } + + var detectingSelectAll; + function onContextMenu(cm, e) { + if (signalDOMEvent(cm, e, "contextmenu")) return; + var display = cm.display, sel = cm.doc.sel; + if (eventInWidget(display, e)) return; + + var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop; + if (!pos || opera) return; // Opera is difficult. + if (posEq(sel.from, sel.to) || posLess(pos, sel.from) || !posLess(pos, sel.to)) + operation(cm, setSelection)(cm.doc, pos, pos); + + var oldCSS = display.input.style.cssText; + display.inputDiv.style.position = "absolute"; + display.input.style.cssText = "position: fixed; width: 30px; height: 30px; top: " + (e.clientY - 5) + + "px; left: " + (e.clientX - 5) + "px; z-index: 1000; background: white; outline: none;" + + "border-width: 0; outline: none; overflow: hidden; opacity: .05; -ms-opacity: .05; filter: alpha(opacity=5);"; + focusInput(cm); + resetInput(cm, true); + // Adds "Select all" to context menu in FF + if (posEq(sel.from, sel.to)) display.input.value = display.prevInput = " "; + + function prepareSelectAllHack() { + if (display.input.selectionStart != null) { + var extval = display.input.value = " " + (posEq(sel.from, sel.to) ? "" : display.input.value); + display.prevInput = " "; + display.input.selectionStart = 1; display.input.selectionEnd = extval.length; + } + } + function rehide() { + display.inputDiv.style.position = "relative"; + display.input.style.cssText = oldCSS; + if (ie_lt9) display.scrollbarV.scrollTop = display.scroller.scrollTop = scrollPos; + slowPoll(cm); + + // Try to detect the user choosing select-all + if (display.input.selectionStart != null) { + if (!ie || ie_lt9) prepareSelectAllHack(); + clearTimeout(detectingSelectAll); + var i = 0, poll = function(){ + if (display.prevInput == " " && display.input.selectionStart == 0) + operation(cm, commands.selectAll)(cm); + else if (i++ < 10) detectingSelectAll = setTimeout(poll, 500); + else resetInput(cm); + }; + detectingSelectAll = setTimeout(poll, 200); + } + } + + if (ie && !ie_lt9) prepareSelectAllHack(); + if (captureMiddleClick) { + e_stop(e); + var mouseup = function() { + off(window, "mouseup", mouseup); + setTimeout(rehide, 20); + }; + on(window, "mouseup", mouseup); + } else { + setTimeout(rehide, 50); + } + } + + // UPDATING + + var changeEnd = CodeMirror.changeEnd = function(change) { + if (!change.text) return change.to; + return Pos(change.from.line + change.text.length - 1, + lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0)); + }; + + // Make sure a position will be valid after the given change. + function clipPostChange(doc, change, pos) { + if (!posLess(change.from, pos)) return clipPos(doc, pos); + var diff = (change.text.length - 1) - (change.to.line - change.from.line); + if (pos.line > change.to.line + diff) { + var preLine = pos.line - diff, lastLine = doc.first + doc.size - 1; + if (preLine > lastLine) return Pos(lastLine, getLine(doc, lastLine).text.length); + return clipToLen(pos, getLine(doc, preLine).text.length); + } + if (pos.line == change.to.line + diff) + return clipToLen(pos, lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0) + + getLine(doc, change.to.line).text.length - change.to.ch); + var inside = pos.line - change.from.line; + return clipToLen(pos, change.text[inside].length + (inside ? 0 : change.from.ch)); + } + + // Hint can be null|"end"|"start"|"around"|{anchor,head} + function computeSelAfterChange(doc, change, hint) { + if (hint && typeof hint == "object") // Assumed to be {anchor, head} object + return {anchor: clipPostChange(doc, change, hint.anchor), + head: clipPostChange(doc, change, hint.head)}; + + if (hint == "start") return {anchor: change.from, head: change.from}; + + var end = changeEnd(change); + if (hint == "around") return {anchor: change.from, head: end}; + if (hint == "end") return {anchor: end, head: end}; + + // hint is null, leave the selection alone as much as possible + var adjustPos = function(pos) { + if (posLess(pos, change.from)) return pos; + if (!posLess(change.to, pos)) return end; + + var line = pos.line + change.text.length - (change.to.line - change.from.line) - 1, ch = pos.ch; + if (pos.line == change.to.line) ch += end.ch - change.to.ch; + return Pos(line, ch); + }; + return {anchor: adjustPos(doc.sel.anchor), head: adjustPos(doc.sel.head)}; + } + + function filterChange(doc, change, update) { + var obj = { + canceled: false, + from: change.from, + to: change.to, + text: change.text, + origin: change.origin, + cancel: function() { this.canceled = true; } + }; + if (update) obj.update = function(from, to, text, origin) { + if (from) this.from = clipPos(doc, from); + if (to) this.to = clipPos(doc, to); + if (text) this.text = text; + if (origin !== undefined) this.origin = origin; + }; + signal(doc, "beforeChange", doc, obj); + if (doc.cm) signal(doc.cm, "beforeChange", doc.cm, obj); + + if (obj.canceled) return null; + return {from: obj.from, to: obj.to, text: obj.text, origin: obj.origin}; + } + + // Replace the range from from to to by the strings in replacement. + // change is a {from, to, text [, origin]} object + function makeChange(doc, change, selUpdate, ignoreReadOnly) { + if (doc.cm) { + if (!doc.cm.curOp) return operation(doc.cm, makeChange)(doc, change, selUpdate, ignoreReadOnly); + if (doc.cm.state.suppressEdits) return; + } + + if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")) { + change = filterChange(doc, change, true); + if (!change) return; + } + + // Possibly split or suppress the update based on the presence + // of read-only spans in its range. + var split = sawReadOnlySpans && !ignoreReadOnly && removeReadOnlyRanges(doc, change.from, change.to); + if (split) { + for (var i = split.length - 1; i >= 1; --i) + makeChangeNoReadonly(doc, {from: split[i].from, to: split[i].to, text: [""]}); + if (split.length) + makeChangeNoReadonly(doc, {from: split[0].from, to: split[0].to, text: change.text}, selUpdate); + } else { + makeChangeNoReadonly(doc, change, selUpdate); + } + } + + function makeChangeNoReadonly(doc, change, selUpdate) { + var selAfter = computeSelAfterChange(doc, change, selUpdate); + addToHistory(doc, change, selAfter, doc.cm ? doc.cm.curOp.id : NaN); + + makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, change)); + var rebased = []; + + linkedDocs(doc, function(doc, sharedHist) { + if (!sharedHist && indexOf(rebased, doc.history) == -1) { + rebaseHist(doc.history, change); + rebased.push(doc.history); + } + makeChangeSingleDoc(doc, change, null, stretchSpansOverChange(doc, change)); + }); + } + + function makeChangeFromHistory(doc, type) { + if (doc.cm && doc.cm.state.suppressEdits) return; + + var hist = doc.history; + var event = (type == "undo" ? hist.done : hist.undone).pop(); + if (!event) return; + + var anti = {changes: [], anchorBefore: event.anchorAfter, headBefore: event.headAfter, + anchorAfter: event.anchorBefore, headAfter: event.headBefore, + generation: hist.generation}; + (type == "undo" ? hist.undone : hist.done).push(anti); + hist.generation = event.generation || ++hist.maxGeneration; + + var filter = hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange"); + + for (var i = event.changes.length - 1; i >= 0; --i) { + var change = event.changes[i]; + change.origin = type; + if (filter && !filterChange(doc, change, false)) { + (type == "undo" ? hist.done : hist.undone).length = 0; + return; + } + + anti.changes.push(historyChangeFromChange(doc, change)); + + var after = i ? computeSelAfterChange(doc, change, null) + : {anchor: event.anchorBefore, head: event.headBefore}; + makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change)); + var rebased = []; + + linkedDocs(doc, function(doc, sharedHist) { + if (!sharedHist && indexOf(rebased, doc.history) == -1) { + rebaseHist(doc.history, change); + rebased.push(doc.history); + } + makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change)); + }); + } + } + + function shiftDoc(doc, distance) { + function shiftPos(pos) {return Pos(pos.line + distance, pos.ch);} + doc.first += distance; + if (doc.cm) regChange(doc.cm, doc.first, doc.first, distance); + doc.sel.head = shiftPos(doc.sel.head); doc.sel.anchor = shiftPos(doc.sel.anchor); + doc.sel.from = shiftPos(doc.sel.from); doc.sel.to = shiftPos(doc.sel.to); + } + + function makeChangeSingleDoc(doc, change, selAfter, spans) { + if (doc.cm && !doc.cm.curOp) + return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans); + + if (change.to.line < doc.first) { + shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line)); + return; + } + if (change.from.line > doc.lastLine()) return; + + // Clip the change to the size of this doc + if (change.from.line < doc.first) { + var shift = change.text.length - 1 - (doc.first - change.from.line); + shiftDoc(doc, shift); + change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change.to.ch), + text: [lst(change.text)], origin: change.origin}; + } + var last = doc.lastLine(); + if (change.to.line > last) { + change = {from: change.from, to: Pos(last, getLine(doc, last).text.length), + text: [change.text[0]], origin: change.origin}; + } + + change.removed = getBetween(doc, change.from, change.to); + + if (!selAfter) selAfter = computeSelAfterChange(doc, change, null); + if (doc.cm) makeChangeSingleDocInEditor(doc.cm, change, spans, selAfter); + else updateDoc(doc, change, spans, selAfter); + } + + function makeChangeSingleDocInEditor(cm, change, spans, selAfter) { + var doc = cm.doc, display = cm.display, from = change.from, to = change.to; + + var recomputeMaxLength = false, checkWidthStart = from.line; + if (!cm.options.lineWrapping) { + checkWidthStart = lineNo(visualLine(doc, getLine(doc, from.line))); + doc.iter(checkWidthStart, to.line + 1, function(line) { + if (line == display.maxLine) { + recomputeMaxLength = true; + return true; + } + }); + } + + if (!posLess(doc.sel.head, change.from) && !posLess(change.to, doc.sel.head)) + cm.curOp.cursorActivity = true; + + updateDoc(doc, change, spans, selAfter, estimateHeight(cm)); + + if (!cm.options.lineWrapping) { + doc.iter(checkWidthStart, from.line + change.text.length, function(line) { + var len = lineLength(doc, line); + if (len > display.maxLineLength) { + display.maxLine = line; + display.maxLineLength = len; + display.maxLineChanged = true; + recomputeMaxLength = false; + } + }); + if (recomputeMaxLength) cm.curOp.updateMaxLine = true; + } + + // Adjust frontier, schedule worker + doc.frontier = Math.min(doc.frontier, from.line); + startWorker(cm, 400); + + var lendiff = change.text.length - (to.line - from.line) - 1; + // Remember that these lines changed, for updating the display + regChange(cm, from.line, to.line + 1, lendiff); + + if (hasHandler(cm, "change")) { + var changeObj = {from: from, to: to, + text: change.text, + removed: change.removed, + origin: change.origin}; + if (cm.curOp.textChanged) { + for (var cur = cm.curOp.textChanged; cur.next; cur = cur.next) {} + cur.next = changeObj; + } else cm.curOp.textChanged = changeObj; + } + } + + function replaceRange(doc, code, from, to, origin) { + if (!to) to = from; + if (posLess(to, from)) { var tmp = to; to = from; from = tmp; } + if (typeof code == "string") code = splitLines(code); + makeChange(doc, {from: from, to: to, text: code, origin: origin}, null); + } + + // POSITION OBJECT + + function Pos(line, ch) { + if (!(this instanceof Pos)) return new Pos(line, ch); + this.line = line; this.ch = ch; + } + CodeMirror.Pos = Pos; + + function posEq(a, b) {return a.line == b.line && a.ch == b.ch;} + function posLess(a, b) {return a.line < b.line || (a.line == b.line && a.ch < b.ch);} + function copyPos(x) {return Pos(x.line, x.ch);} + + // SELECTION + + function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1));} + function clipPos(doc, pos) { + if (pos.line < doc.first) return Pos(doc.first, 0); + var last = doc.first + doc.size - 1; + if (pos.line > last) return Pos(last, getLine(doc, last).text.length); + return clipToLen(pos, getLine(doc, pos.line).text.length); + } + function clipToLen(pos, linelen) { + var ch = pos.ch; + if (ch == null || ch > linelen) return Pos(pos.line, linelen); + else if (ch < 0) return Pos(pos.line, 0); + else return pos; + } + function isLine(doc, l) {return l >= doc.first && l < doc.first + doc.size;} + + // If shift is held, this will move the selection anchor. Otherwise, + // it'll set the whole selection. + function extendSelection(doc, pos, other, bias) { + if (doc.sel.shift || doc.sel.extend) { + var anchor = doc.sel.anchor; + if (other) { + var posBefore = posLess(pos, anchor); + if (posBefore != posLess(other, anchor)) { + anchor = pos; + pos = other; + } else if (posBefore != posLess(pos, other)) { + pos = other; + } + } + setSelection(doc, anchor, pos, bias); + } else { + setSelection(doc, pos, other || pos, bias); + } + if (doc.cm) doc.cm.curOp.userSelChange = true; + + if (doc.cm) { + var from = doc.sel.from; + var to = doc.sel.to; + + if (posEq(from, to) && doc.cm.display.input.setSelectionRange) { + clearTimeout(doc.cm.state.accessibleTextareaTimeout); + doc.cm.state.accessibleTextareaWaiting = true; + + doc.cm.display.input.value = doc.getLine(from.line) + "\n"; + doc.cm.display.input.setSelectionRange(from.ch, from.ch); + + doc.cm.state.accessibleTextareaTimeout = setTimeout(function() { + clearAccessibleTextarea(doc.cm); + }, 80); + } + } + } + + function clearAccessibleTextarea(cm) { + clearTimeout(cm.state.accessibleTextareaTimeout); + cm.state.accessibleTextareaWaiting = false; + resetInput(cm, true); + } + + function filterSelectionChange(doc, anchor, head) { + var obj = {anchor: anchor, head: head}; + signal(doc, "beforeSelectionChange", doc, obj); + if (doc.cm) signal(doc.cm, "beforeSelectionChange", doc.cm, obj); + obj.anchor = clipPos(doc, obj.anchor); obj.head = clipPos(doc, obj.head); + return obj; + } + + // Update the selection. Last two args are only used by + // updateDoc, since they have to be expressed in the line + // numbers before the update. + function setSelection(doc, anchor, head, bias, checkAtomic) { + if (!checkAtomic && hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange")) { + var filtered = filterSelectionChange(doc, anchor, head); + head = filtered.head; + anchor = filtered.anchor; + } + + var sel = doc.sel; + sel.goalColumn = null; + // Skip over atomic spans. + if (checkAtomic || !posEq(anchor, sel.anchor)) + anchor = skipAtomic(doc, anchor, bias, checkAtomic != "push"); + if (checkAtomic || !posEq(head, sel.head)) + head = skipAtomic(doc, head, bias, checkAtomic != "push"); + + if (posEq(sel.anchor, anchor) && posEq(sel.head, head)) return; + + sel.anchor = anchor; sel.head = head; + var inv = posLess(head, anchor); + sel.from = inv ? head : anchor; + sel.to = inv ? anchor : head; + + if (doc.cm) + doc.cm.curOp.updateInput = doc.cm.curOp.selectionChanged = + doc.cm.curOp.cursorActivity = true; + + signalLater(doc, "cursorActivity", doc); + } + + function reCheckSelection(cm) { + setSelection(cm.doc, cm.doc.sel.from, cm.doc.sel.to, null, "push"); + } + + function skipAtomic(doc, pos, bias, mayClear) { + var flipped = false, curPos = pos; + var dir = bias || 1; + doc.cantEdit = false; + search: for (;;) { + var line = getLine(doc, curPos.line); + if (line.markedSpans) { + for (var i = 0; i < line.markedSpans.length; ++i) { + var sp = line.markedSpans[i], m = sp.marker; + if ((sp.from == null || (m.inclusiveLeft ? sp.from <= curPos.ch : sp.from < curPos.ch)) && + (sp.to == null || (m.inclusiveRight ? sp.to >= curPos.ch : sp.to > curPos.ch))) { + if (mayClear) { + signal(m, "beforeCursorEnter"); + if (m.explicitlyCleared) { + if (!line.markedSpans) break; + else {--i; continue;} + } + } + if (!m.atomic) continue; + var newPos = m.find()[dir < 0 ? "from" : "to"]; + if (posEq(newPos, curPos)) { + newPos.ch += dir; + if (newPos.ch < 0) { + if (newPos.line > doc.first) newPos = clipPos(doc, Pos(newPos.line - 1)); + else newPos = null; + } else if (newPos.ch > line.text.length) { + if (newPos.line < doc.first + doc.size - 1) newPos = Pos(newPos.line + 1, 0); + else newPos = null; + } + if (!newPos) { + if (flipped) { + // Driven in a corner -- no valid cursor position found at all + // -- try again *with* clearing, if we didn't already + if (!mayClear) return skipAtomic(doc, pos, bias, true); + // Otherwise, turn off editing until further notice, and return the start of the doc + doc.cantEdit = true; + return Pos(doc.first, 0); + } + flipped = true; newPos = pos; dir = -dir; + } + } + curPos = newPos; + continue search; + } + } + } + return curPos; + } + } + + // SCROLLING + + function scrollCursorIntoView(cm) { + var coords = scrollPosIntoView(cm, cm.doc.sel.head, cm.options.cursorScrollMargin); + if (!cm.state.focused) return; + var display = cm.display, box = getRect(display.sizer), doScroll = null; + if (coords.top + box.top < 0) doScroll = true; + else if (coords.bottom + box.top > (window.innerHeight || document.documentElement.clientHeight)) doScroll = false; + if (doScroll != null && !phantom) { + var hidden = display.cursor.style.display == "none"; + if (hidden) { + display.cursor.style.display = ""; + display.cursor.style.left = coords.left + "px"; + display.cursor.style.top = (coords.top - display.viewOffset) + "px"; + } + display.cursor.scrollIntoView(doScroll); + if (hidden) display.cursor.style.display = "none"; + } + } + + function scrollPosIntoView(cm, pos, margin) { + if (margin == null) margin = 0; + for (;;) { + var changed = false, coords = cursorCoords(cm, pos); + var scrollPos = calculateScrollPos(cm, coords.left, coords.top - margin, coords.left, coords.bottom + margin); + var startTop = cm.doc.scrollTop, startLeft = cm.doc.scrollLeft; + if (scrollPos.scrollTop != null) { + setScrollTop(cm, scrollPos.scrollTop); + if (Math.abs(cm.doc.scrollTop - startTop) > 1) changed = true; + } + if (scrollPos.scrollLeft != null) { + setScrollLeft(cm, scrollPos.scrollLeft); + if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) changed = true; + } + if (!changed) return coords; + } + } + + function scrollIntoView(cm, x1, y1, x2, y2) { + var scrollPos = calculateScrollPos(cm, x1, y1, x2, y2); + if (scrollPos.scrollTop != null) setScrollTop(cm, scrollPos.scrollTop); + if (scrollPos.scrollLeft != null) setScrollLeft(cm, scrollPos.scrollLeft); + } + + function calculateScrollPos(cm, x1, y1, x2, y2) { + var display = cm.display, snapMargin = textHeight(cm.display); + if (y1 < 0) y1 = 0; + var screen = display.scroller.clientHeight - scrollerCutOff, screentop = display.scroller.scrollTop, result = {}; + var docBottom = cm.doc.height + paddingVert(display); + var atTop = y1 < snapMargin, atBottom = y2 > docBottom - snapMargin; + if (y1 < screentop) { + result.scrollTop = atTop ? 0 : y1; + } else if (y2 > screentop + screen) { + var newTop = Math.min(y1, (atBottom ? docBottom : y2) - screen); + if (newTop != screentop) result.scrollTop = newTop; + } + + var screenw = display.scroller.clientWidth - scrollerCutOff, screenleft = display.scroller.scrollLeft; + x1 += display.gutters.offsetWidth; x2 += display.gutters.offsetWidth; + var gutterw = display.gutters.offsetWidth; + var atLeft = x1 < gutterw + 10; + if (x1 < screenleft + gutterw || atLeft) { + if (atLeft) x1 = 0; + result.scrollLeft = Math.max(0, x1 - 10 - gutterw); + } else if (x2 > screenw + screenleft - 3) { + result.scrollLeft = x2 + 10 - screenw; + } + return result; + } + + function updateScrollPos(cm, left, top) { + cm.curOp.updateScrollPos = {scrollLeft: left == null ? cm.doc.scrollLeft : left, + scrollTop: top == null ? cm.doc.scrollTop : top}; + } + + function addToScrollPos(cm, left, top) { + var pos = cm.curOp.updateScrollPos || (cm.curOp.updateScrollPos = {scrollLeft: cm.doc.scrollLeft, scrollTop: cm.doc.scrollTop}); + var scroll = cm.display.scroller; + pos.scrollTop = Math.max(0, Math.min(scroll.scrollHeight - scroll.clientHeight, pos.scrollTop + top)); + pos.scrollLeft = Math.max(0, Math.min(scroll.scrollWidth - scroll.clientWidth, pos.scrollLeft + left)); + } + + // API UTILITIES + + function indentLine(cm, n, how, aggressive) { + var doc = cm.doc; + if (how == null) how = "add"; + if (how == "smart") { + if (!cm.doc.mode.indent) how = "prev"; + else var state = getStateBefore(cm, n); + } + + var tabSize = cm.options.tabSize; + var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize); + var curSpaceString = line.text.match(/^\s*/)[0], indentation; + if (how == "smart") { + indentation = cm.doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text); + if (indentation == Pass) { + if (!aggressive) return; + how = "prev"; + } + } + if (how == "prev") { + if (n > doc.first) indentation = countColumn(getLine(doc, n-1).text, null, tabSize); + else indentation = 0; + } else if (how == "add") { + indentation = curSpace + cm.options.indentUnit; + } else if (how == "subtract") { + indentation = curSpace - cm.options.indentUnit; + } else if (typeof how == "number") { + indentation = curSpace + how; + } + indentation = Math.max(0, indentation); + + var indentString = "", pos = 0; + if (cm.options.indentWithTabs) + for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t";} + if (pos < indentation) indentString += spaceStr(indentation - pos); + + if (indentString != curSpaceString) + replaceRange(cm.doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input"); + line.stateAfter = null; + } + + function changeLine(cm, handle, op) { + var no = handle, line = handle, doc = cm.doc; + if (typeof handle == "number") line = getLine(doc, clipLine(doc, handle)); + else no = lineNo(handle); + if (no == null) return null; + if (op(line, no)) regChange(cm, no, no + 1); + else return null; + return line; + } + + function findPosH(doc, pos, dir, unit, visually) { + var line = pos.line, ch = pos.ch, origDir = dir; + var lineObj = getLine(doc, line); + var possible = true; + function findNextLine() { + var l = line + dir; + if (l < doc.first || l >= doc.first + doc.size) return (possible = false); + line = l; + return lineObj = getLine(doc, l); + } + function moveOnce(boundToLine) { + var next = (visually ? moveVisually : moveLogically)(lineObj, ch, dir, true); + if (next == null) { + if (!boundToLine && findNextLine()) { + if (visually) ch = (dir < 0 ? lineRight : lineLeft)(lineObj); + else ch = dir < 0 ? lineObj.text.length : 0; + } else return (possible = false); + } else ch = next; + return true; + } + + if (unit == "char") moveOnce(); + else if (unit == "column") moveOnce(true); + else if (unit == "word" || unit == "group") { + var sawType = null, group = unit == "group"; + for (var first = true;; first = false) { + if (dir < 0 && !moveOnce(!first)) break; + var cur = lineObj.text.charAt(ch) || "\n"; + var type = isWordChar(cur) ? "w" + : !group ? null + : /\s/.test(cur) ? null + : "p"; + if (sawType && sawType != type) { + if (dir < 0) {dir = 1; moveOnce();} + break; + } + if (type) sawType = type; + if (dir > 0 && !moveOnce(!first)) break; + } + } + var result = skipAtomic(doc, Pos(line, ch), origDir, true); + if (!possible) result.hitSide = true; + return result; + } + + function findPosV(cm, pos, dir, unit) { + var doc = cm.doc, x = pos.left, y; + if (unit == "page") { + var pageSize = Math.min(cm.display.wrapper.clientHeight, window.innerHeight || document.documentElement.clientHeight); + y = pos.top + dir * (pageSize - (dir < 0 ? 1.5 : .5) * textHeight(cm.display)); + } else if (unit == "line") { + y = dir > 0 ? pos.bottom + 3 : pos.top - 3; + } + for (;;) { + var target = coordsChar(cm, x, y); + if (!target.outside) break; + if (dir < 0 ? y <= 0 : y >= doc.height) { target.hitSide = true; break; } + y += dir * 5; + } + return target; + } + + function findWordAt(line, pos) { + var start = pos.ch, end = pos.ch; + if (line) { + if ((pos.xRel < 0 || end == line.length) && start) --start; else ++end; + var startChar = line.charAt(start); + var check = isWordChar(startChar) ? isWordChar + : /\s/.test(startChar) ? function(ch) {return /\s/.test(ch);} + : function(ch) {return !/\s/.test(ch) && !isWordChar(ch);}; + while (start > 0 && check(line.charAt(start - 1))) --start; + while (end < line.length && check(line.charAt(end))) ++end; + } + return {from: Pos(pos.line, start), to: Pos(pos.line, end)}; + } + + function selectLine(cm, line) { + extendSelection(cm.doc, Pos(line, 0), clipPos(cm.doc, Pos(line + 1, 0))); + } + + // PROTOTYPE + + // The publicly visible API. Note that operation(null, f) means + // 'wrap f in an operation, performed on its `this` parameter' + + CodeMirror.prototype = { + constructor: CodeMirror, + focus: function(){window.focus(); focusInput(this); onFocus(this); fastPoll(this);}, + + setOption: function(option, value) { + var options = this.options, old = options[option]; + if (options[option] == value && option != "mode") return; + options[option] = value; + if (optionHandlers.hasOwnProperty(option)) + operation(this, optionHandlers[option])(this, value, old); + }, + + getOption: function(option) {return this.options[option];}, + getDoc: function() {return this.doc;}, + + addKeyMap: function(map, bottom) { + this.state.keyMaps[bottom ? "push" : "unshift"](map); + }, + removeKeyMap: function(map) { + var maps = this.state.keyMaps; + for (var i = 0; i < maps.length; ++i) + if (maps[i] == map || (typeof maps[i] != "string" && maps[i].name == map)) { + maps.splice(i, 1); + return true; + } + }, + + addOverlay: operation(null, function(spec, options) { + var mode = spec.token ? spec : CodeMirror.getMode(this.options, spec); + if (mode.startState) throw new Error("Overlays may not be stateful."); + this.state.overlays.push({mode: mode, modeSpec: spec, opaque: options && options.opaque}); + this.state.modeGen++; + regChange(this); + }), + removeOverlay: operation(null, function(spec) { + var overlays = this.state.overlays; + for (var i = 0; i < overlays.length; ++i) { + var cur = overlays[i].modeSpec; + if (cur == spec || typeof spec == "string" && cur.name == spec) { + overlays.splice(i, 1); + this.state.modeGen++; + regChange(this); + return; + } + } + }), + + indentLine: operation(null, function(n, dir, aggressive) { + if (typeof dir != "string" && typeof dir != "number") { + if (dir == null) dir = this.options.smartIndent ? "smart" : "prev"; + else dir = dir ? "add" : "subtract"; + } + if (isLine(this.doc, n)) indentLine(this, n, dir, aggressive); + }), + indentSelection: operation(null, function(how) { + var sel = this.doc.sel; + if (posEq(sel.from, sel.to)) return indentLine(this, sel.from.line, how); + var e = sel.to.line - (sel.to.ch ? 0 : 1); + for (var i = sel.from.line; i <= e; ++i) indentLine(this, i, how); + }), + + // Fetch the parser token for a given character. Useful for hacks + // that want to inspect the mode state (say, for completion). + getTokenAt: function(pos, precise) { + var doc = this.doc; + pos = clipPos(doc, pos); + var state = getStateBefore(this, pos.line, precise), mode = this.doc.mode; + var line = getLine(doc, pos.line); + var stream = new StringStream(line.text, this.options.tabSize); + while (stream.pos < pos.ch && !stream.eol()) { + stream.start = stream.pos; + var style = mode.token(stream, state); + } + return {start: stream.start, + end: stream.pos, + string: stream.current(), + className: style || null, // Deprecated, use 'type' instead + type: style || null, + state: state}; + }, + + getTokenTypeAt: function(pos) { + pos = clipPos(this.doc, pos); + var styles = getLineStyles(this, getLine(this.doc, pos.line)); + var before = 0, after = (styles.length - 1) / 2, ch = pos.ch; + if (ch == 0) return styles[2]; + for (;;) { + var mid = (before + after) >> 1; + if ((mid ? styles[mid * 2 - 1] : 0) >= ch) after = mid; + else if (styles[mid * 2 + 1] < ch) before = mid + 1; + else return styles[mid * 2 + 2]; + } + }, + + getModeAt: function(pos) { + var mode = this.doc.mode; + if (!mode.innerMode) return mode; + return CodeMirror.innerMode(mode, this.getTokenAt(pos).state).mode; + }, + + getHelper: function(pos, type) { + if (!helpers.hasOwnProperty(type)) return; + var help = helpers[type], mode = this.getModeAt(pos); + return mode[type] && help[mode[type]] || + mode.helperType && help[mode.helperType] || + help[mode.name]; + }, + + getStateAfter: function(line, precise) { + var doc = this.doc; + line = clipLine(doc, line == null ? doc.first + doc.size - 1: line); + return getStateBefore(this, line + 1, precise); + }, + + cursorCoords: function(start, mode) { + var pos, sel = this.doc.sel; + if (start == null) pos = sel.head; + else if (typeof start == "object") pos = clipPos(this.doc, start); + else pos = start ? sel.from : sel.to; + return cursorCoords(this, pos, mode || "page"); + }, + + charCoords: function(pos, mode) { + return charCoords(this, clipPos(this.doc, pos), mode || "page"); + }, + + coordsChar: function(coords, mode) { + coords = fromCoordSystem(this, coords, mode || "page"); + return coordsChar(this, coords.left, coords.top); + }, + + lineAtHeight: function(height, mode) { + height = fromCoordSystem(this, {top: height, left: 0}, mode || "page").top; + return lineAtHeight(this.doc, height + this.display.viewOffset); + }, + heightAtLine: function(line, mode) { + var end = false, last = this.doc.first + this.doc.size - 1; + if (line < this.doc.first) line = this.doc.first; + else if (line > last) { line = last; end = true; } + var lineObj = getLine(this.doc, line); + return intoCoordSystem(this, getLine(this.doc, line), {top: 0, left: 0}, mode || "page").top + + (end ? lineObj.height : 0); + }, + + defaultTextHeight: function() { return textHeight(this.display); }, + defaultCharWidth: function() { return charWidth(this.display); }, + + setGutterMarker: operation(null, function(line, gutterID, value) { + return changeLine(this, line, function(line) { + var markers = line.gutterMarkers || (line.gutterMarkers = {}); + markers[gutterID] = value; + if (!value && isEmpty(markers)) line.gutterMarkers = null; + return true; + }); + }), + + clearGutter: operation(null, function(gutterID) { + var cm = this, doc = cm.doc, i = doc.first; + doc.iter(function(line) { + if (line.gutterMarkers && line.gutterMarkers[gutterID]) { + line.gutterMarkers[gutterID] = null; + regChange(cm, i, i + 1); + if (isEmpty(line.gutterMarkers)) line.gutterMarkers = null; + } + ++i; + }); + }), + + addLineClass: operation(null, function(handle, where, cls) { + return changeLine(this, handle, function(line) { + var prop = where == "text" ? "textClass" : where == "background" ? "bgClass" : "wrapClass"; + if (!line[prop]) line[prop] = cls; + else if (new RegExp("(?:^|\\s)" + cls + "(?:$|\\s)").test(line[prop])) return false; + else line[prop] += " " + cls; + return true; + }); + }), + + removeLineClass: operation(null, function(handle, where, cls) { + return changeLine(this, handle, function(line) { + var prop = where == "text" ? "textClass" : where == "background" ? "bgClass" : "wrapClass"; + var cur = line[prop]; + if (!cur) return false; + else if (cls == null) line[prop] = null; + else { + var found = cur.match(new RegExp("(?:^|\\s+)" + cls + "(?:$|\\s+)")); + if (!found) return false; + var end = found.index + found[0].length; + line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.length ? "" : " ") + cur.slice(end) || null; + } + return true; + }); + }), + + addLineWidget: operation(null, function(handle, node, options) { + return addLineWidget(this, handle, node, options); + }), + + removeLineWidget: function(widget) { widget.clear(); }, + + lineInfo: function(line) { + if (typeof line == "number") { + if (!isLine(this.doc, line)) return null; + var n = line; + line = getLine(this.doc, line); + if (!line) return null; + } else { + var n = lineNo(line); + if (n == null) return null; + } + return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers, + textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass, + widgets: line.widgets}; + }, + + getViewport: function() { return {from: this.display.showingFrom, to: this.display.showingTo};}, + + addWidget: function(pos, node, scroll, vert, horiz) { + var display = this.display; + pos = cursorCoords(this, clipPos(this.doc, pos)); + var top = pos.bottom, left = pos.left; + node.style.position = "absolute"; + display.sizer.appendChild(node); + if (vert == "over") { + top = pos.top; + } else if (vert == "above" || vert == "near") { + var vspace = Math.max(display.wrapper.clientHeight, this.doc.height), + hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWidth); + // Default to positioning above (if specified and possible); otherwise default to positioning below + if ((vert == 'above' || pos.bottom + node.offsetHeight > vspace) && pos.top > node.offsetHeight) + top = pos.top - node.offsetHeight; + else if (pos.bottom + node.offsetHeight <= vspace) + top = pos.bottom; + if (left + node.offsetWidth > hspace) + left = hspace - node.offsetWidth; + } + node.style.top = top + "px"; + node.style.left = node.style.right = ""; + if (horiz == "right") { + left = display.sizer.clientWidth - node.offsetWidth; + node.style.right = "0px"; + } else { + if (horiz == "left") left = 0; + else if (horiz == "middle") left = (display.sizer.clientWidth - node.offsetWidth) / 2; + node.style.left = left + "px"; + } + if (scroll) + scrollIntoView(this, left, top, left + node.offsetWidth, top + node.offsetHeight); + }, + + triggerOnKeyDown: operation(null, onKeyDown), + + execCommand: function(cmd) {return commands[cmd](this);}, + + findPosH: function(from, amount, unit, visually) { + var dir = 1; + if (amount < 0) { dir = -1; amount = -amount; } + for (var i = 0, cur = clipPos(this.doc, from); i < amount; ++i) { + cur = findPosH(this.doc, cur, dir, unit, visually); + if (cur.hitSide) break; + } + return cur; + }, + + moveH: operation(null, function(dir, unit) { + var sel = this.doc.sel, pos; + if (sel.shift || sel.extend || posEq(sel.from, sel.to)) + pos = findPosH(this.doc, sel.head, dir, unit, this.options.rtlMoveVisually); + else + pos = dir < 0 ? sel.from : sel.to; + extendSelection(this.doc, pos, pos, dir); + }), + + deleteH: operation(null, function(dir, unit) { + var sel = this.doc.sel; + if (!posEq(sel.from, sel.to)) replaceRange(this.doc, "", sel.from, sel.to, "+delete"); + else replaceRange(this.doc, "", sel.from, findPosH(this.doc, sel.head, dir, unit, false), "+delete"); + this.curOp.userSelChange = true; + }), + + findPosV: function(from, amount, unit, goalColumn) { + var dir = 1, x = goalColumn; + if (amount < 0) { dir = -1; amount = -amount; } + for (var i = 0, cur = clipPos(this.doc, from); i < amount; ++i) { + var coords = cursorCoords(this, cur, "div"); + if (x == null) x = coords.left; + else coords.left = x; + cur = findPosV(this, coords, dir, unit); + if (cur.hitSide) break; + } + return cur; + }, + + moveV: operation(null, function(dir, unit) { + var sel = this.doc.sel; + var pos = cursorCoords(this, sel.head, "div"); + if (sel.goalColumn != null) pos.left = sel.goalColumn; + var target = findPosV(this, pos, dir, unit); + + if (unit == "page") addToScrollPos(this, 0, charCoords(this, target, "div").top - pos.top); + extendSelection(this.doc, target, target, dir); + sel.goalColumn = pos.left; + }), + + toggleOverwrite: function(value) { + if (value != null && value == this.state.overwrite) return; + if (this.state.overwrite = !this.state.overwrite) + this.display.cursor.className += " CodeMirror-overwrite"; + else + this.display.cursor.className = this.display.cursor.className.replace(" CodeMirror-overwrite", ""); + }, + hasFocus: function() { return this.state.focused; }, + + scrollTo: operation(null, function(x, y) { + updateScrollPos(this, x, y); + }), + getScrollInfo: function() { + var scroller = this.display.scroller, co = scrollerCutOff; + return {left: scroller.scrollLeft, top: scroller.scrollTop, + height: scroller.scrollHeight - co, width: scroller.scrollWidth - co, + clientHeight: scroller.clientHeight - co, clientWidth: scroller.clientWidth - co}; + }, + + scrollIntoView: operation(null, function(pos, margin) { + if (typeof pos == "number") pos = Pos(pos, 0); + if (!margin) margin = 0; + var coords = pos; + + if (!pos || pos.line != null) { + this.curOp.scrollToPos = pos ? clipPos(this.doc, pos) : this.doc.sel.head; + this.curOp.scrollToPosMargin = margin; + coords = cursorCoords(this, this.curOp.scrollToPos); + } + var sPos = calculateScrollPos(this, coords.left, coords.top - margin, coords.right, coords.bottom + margin); + updateScrollPos(this, sPos.scrollLeft, sPos.scrollTop); + }), + + setSize: operation(null, function(width, height) { + function interpret(val) { + return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val; + } + if (width != null) this.display.wrapper.style.width = interpret(width); + if (height != null) this.display.wrapper.style.height = interpret(height); + if (this.options.lineWrapping) + this.display.measureLineCache.length = this.display.measureLineCachePos = 0; + this.curOp.forceUpdate = true; + }), + + operation: function(f){return runInOp(this, f);}, + + refresh: operation(null, function() { + clearCaches(this); + updateScrollPos(this, this.doc.scrollLeft, this.doc.scrollTop); + regChange(this); + }), + + swapDoc: operation(null, function(doc) { + var old = this.doc; + old.cm = null; + attachDoc(this, doc); + clearCaches(this); + resetInput(this, true); + updateScrollPos(this, doc.scrollLeft, doc.scrollTop); + return old; + }), + + getInputField: function(){return this.display.input;}, + getWrapperElement: function(){return this.display.wrapper;}, + getScrollerElement: function(){return this.display.scroller;}, + getGutterElement: function(){return this.display.gutters;} + }; + eventMixin(CodeMirror); + + // OPTION DEFAULTS + + var optionHandlers = CodeMirror.optionHandlers = {}; + + // The default configuration options. + var defaults = CodeMirror.defaults = {}; + + function option(name, deflt, handle, notOnInit) { + CodeMirror.defaults[name] = deflt; + if (handle) optionHandlers[name] = + notOnInit ? function(cm, val, old) {if (old != Init) handle(cm, val, old);} : handle; + } + + var Init = CodeMirror.Init = {toString: function(){return "CodeMirror.Init";}}; + + // These two are, on init, called from the constructor because they + // have to be initialized before the editor can start at all. + option("value", "", function(cm, val) { + cm.setValue(val); + }, true); + option("mode", null, function(cm, val) { + cm.doc.modeOption = val; + loadMode(cm); + }, true); + + option("indentUnit", 2, loadMode, true); + option("indentWithTabs", false); + option("smartIndent", true); + option("tabSize", 4, function(cm) { + loadMode(cm); + clearCaches(cm); + regChange(cm); + }, true); + option("electricChars", true); + option("rtlMoveVisually", !windows); + + option("theme", "default", function(cm) { + themeChanged(cm); + guttersChanged(cm); + }, true); + option("keyMap", "default", keyMapChanged); + option("extraKeys", null); + + option("onKeyEvent", null); + option("onDragEvent", null); + + option("lineWrapping", false, wrappingChanged, true); + option("gutters", [], function(cm) { + setGuttersForLineNumbers(cm.options); + guttersChanged(cm); + }, true); + option("fixedGutter", true, function(cm, val) { + cm.display.gutters.style.left = val ? compensateForHScroll(cm.display) + "px" : "0"; + cm.refresh(); + }, true); + option("coverGutterNextToScrollbar", false, updateScrollbars, true); + option("lineNumbers", false, function(cm) { + setGuttersForLineNumbers(cm.options); + guttersChanged(cm); + }, true); + option("firstLineNumber", 1, guttersChanged, true); + option("lineNumberFormatter", function(integer) {return integer;}, guttersChanged, true); + option("showCursorWhenSelecting", false, updateSelection, true); + + option("readOnly", false, function(cm, val) { + if (val == "nocursor") {onBlur(cm); cm.display.input.blur();} + else if (!val) resetInput(cm, true); + }); + option("dragDrop", true); + + option("cursorBlinkRate", 530); + option("cursorScrollMargin", 0); + option("cursorHeight", 1); + option("workTime", 100); + option("workDelay", 100); + option("flattenSpans", true); + option("pollInterval", 100); + option("undoDepth", 40, function(cm, val){cm.doc.history.undoDepth = val;}); + option("historyEventDelay", 500); + option("viewportMargin", 10, function(cm){cm.refresh();}, true); + option("maxHighlightLength", 10000, function(cm){loadMode(cm); cm.refresh();}, true); + option("moveInputWithCursor", true, function(cm, val) { + if (!val) cm.display.inputDiv.style.top = cm.display.inputDiv.style.left = 0; + }); + + option("tabindex", null, function(cm, val) { + cm.display.input.tabIndex = val || ""; + }); + option("autofocus", null); + + // MODE DEFINITION AND QUERYING + + // Known modes, by name and by MIME + var modes = CodeMirror.modes = {}, mimeModes = CodeMirror.mimeModes = {}; + + CodeMirror.defineMode = function(name, mode) { + if (!CodeMirror.defaults.mode && name != "null") CodeMirror.defaults.mode = name; + if (arguments.length > 2) { + mode.dependencies = []; + for (var i = 2; i < arguments.length; ++i) mode.dependencies.push(arguments[i]); + } + modes[name] = mode; + }; + + CodeMirror.defineMIME = function(mime, spec) { + mimeModes[mime] = spec; + }; + + CodeMirror.resolveMode = function(spec) { + if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) { + spec = mimeModes[spec]; + } else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty(spec.name)) { + var found = mimeModes[spec.name]; + spec = createObj(found, spec); + spec.name = found.name; + } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec)) { + return CodeMirror.resolveMode("application/xml"); + } + if (typeof spec == "string") return {name: spec}; + else return spec || {name: "null"}; + }; + + CodeMirror.getMode = function(options, spec) { + var spec = CodeMirror.resolveMode(spec); + var mfactory = modes[spec.name]; + if (!mfactory) return CodeMirror.getMode(options, "text/plain"); + var modeObj = mfactory(options, spec); + if (modeExtensions.hasOwnProperty(spec.name)) { + var exts = modeExtensions[spec.name]; + for (var prop in exts) { + if (!exts.hasOwnProperty(prop)) continue; + if (modeObj.hasOwnProperty(prop)) modeObj["_" + prop] = modeObj[prop]; + modeObj[prop] = exts[prop]; + } + } + modeObj.name = spec.name; + + return modeObj; + }; + + CodeMirror.defineMode("null", function() { + return {token: function(stream) {stream.skipToEnd();}}; + }); + CodeMirror.defineMIME("text/plain", "null"); + + var modeExtensions = CodeMirror.modeExtensions = {}; + CodeMirror.extendMode = function(mode, properties) { + var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {}); + copyObj(properties, exts); + }; + + // EXTENSIONS + + CodeMirror.defineExtension = function(name, func) { + CodeMirror.prototype[name] = func; + }; + CodeMirror.defineDocExtension = function(name, func) { + Doc.prototype[name] = func; + }; + CodeMirror.defineOption = option; + + var initHooks = []; + CodeMirror.defineInitHook = function(f) {initHooks.push(f);}; + + var helpers = CodeMirror.helpers = {}; + CodeMirror.registerHelper = function(type, name, value) { + if (!helpers.hasOwnProperty(type)) helpers[type] = CodeMirror[type] = {}; + helpers[type][name] = value; + }; + + // UTILITIES + + CodeMirror.isWordChar = isWordChar; + + // MODE STATE HANDLING + + // Utility functions for working with state. Exported because modes + // sometimes need to do this. + function copyState(mode, state) { + if (state === true) return state; + if (mode.copyState) return mode.copyState(state); + var nstate = {}; + for (var n in state) { + var val = state[n]; + if (val instanceof Array) val = val.concat([]); + nstate[n] = val; + } + return nstate; + } + CodeMirror.copyState = copyState; + + function startState(mode, a1, a2) { + return mode.startState ? mode.startState(a1, a2) : true; + } + CodeMirror.startState = startState; + + CodeMirror.innerMode = function(mode, state) { + while (mode.innerMode) { + var info = mode.innerMode(state); + if (!info || info.mode == mode) break; + state = info.state; + mode = info.mode; + } + return info || {mode: mode, state: state}; + }; + + // STANDARD COMMANDS + + var commands = CodeMirror.commands = { + selectAll: function(cm) {cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.lastLine()));}, + killLine: function(cm) { + var from = cm.getCursor(true), to = cm.getCursor(false), sel = !posEq(from, to); + if (!sel && cm.getLine(from.line).length == from.ch) + cm.replaceRange("", from, Pos(from.line + 1, 0), "+delete"); + else cm.replaceRange("", from, sel ? to : Pos(from.line), "+delete"); + }, + deleteLine: function(cm) { + var l = cm.getCursor().line; + cm.replaceRange("", Pos(l, 0), Pos(l), "+delete"); + }, + delLineLeft: function(cm) { + var cur = cm.getCursor(); + cm.replaceRange("", Pos(cur.line, 0), cur, "+delete"); + }, + undo: function(cm) {cm.undo();}, + redo: function(cm) {cm.redo();}, + goDocStart: function(cm) {cm.extendSelection(Pos(cm.firstLine(), 0));}, + goDocEnd: function(cm) {cm.extendSelection(Pos(cm.lastLine()));}, + goLineStart: function(cm) { + cm.extendSelection(lineStart(cm, cm.getCursor().line)); + }, + goLineStartSmart: function(cm) { + var cur = cm.getCursor(), start = lineStart(cm, cur.line); + var line = cm.getLineHandle(start.line); + var order = getOrder(line); + if (!order || order[0].level == 0) { + var firstNonWS = Math.max(0, line.text.search(/\S/)); + var inWS = cur.line == start.line && cur.ch <= firstNonWS && cur.ch; + cm.extendSelection(Pos(start.line, inWS ? 0 : firstNonWS)); + } else cm.extendSelection(start); + }, + goLineEnd: function(cm) { + cm.extendSelection(lineEnd(cm, cm.getCursor().line)); + }, + goLineRight: function(cm) { + var top = cm.charCoords(cm.getCursor(), "div").top + 5; + cm.extendSelection(cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div")); + }, + goLineLeft: function(cm) { + var top = cm.charCoords(cm.getCursor(), "div").top + 5; + cm.extendSelection(cm.coordsChar({left: 0, top: top}, "div")); + }, + goLineUp: function(cm) {cm.moveV(-1, "line");}, + goLineDown: function(cm) {cm.moveV(1, "line");}, + goPageUp: function(cm) {cm.moveV(-1, "page");}, + goPageDown: function(cm) {cm.moveV(1, "page");}, + goCharLeft: function(cm) {cm.moveH(-1, "char");}, + goCharRight: function(cm) {cm.moveH(1, "char");}, + goColumnLeft: function(cm) {cm.moveH(-1, "column");}, + goColumnRight: function(cm) {cm.moveH(1, "column");}, + goWordLeft: function(cm) {cm.moveH(-1, "word");}, + goGroupRight: function(cm) {cm.moveH(1, "group");}, + goGroupLeft: function(cm) {cm.moveH(-1, "group");}, + goWordRight: function(cm) {cm.moveH(1, "word");}, + delCharBefore: function(cm) {cm.deleteH(-1, "char");}, + delCharAfter: function(cm) {cm.deleteH(1, "char");}, + delWordBefore: function(cm) {cm.deleteH(-1, "word");}, + delWordAfter: function(cm) {cm.deleteH(1, "word");}, + delGroupBefore: function(cm) {cm.deleteH(-1, "group");}, + delGroupAfter: function(cm) {cm.deleteH(1, "group");}, + indentAuto: function(cm) {cm.indentSelection("smart");}, + indentMore: function(cm) {cm.indentSelection("add");}, + indentLess: function(cm) {cm.indentSelection("subtract");}, + insertTab: function(cm) {cm.replaceSelection("\t", "end", "+input");}, + defaultTab: function(cm) { + if (cm.somethingSelected()) cm.indentSelection("add"); + else cm.replaceSelection("\t", "end", "+input"); + }, + transposeChars: function(cm) { + var cur = cm.getCursor(), line = cm.getLine(cur.line); + if (cur.ch > 0 && cur.ch < line.length - 1) + cm.replaceRange(line.charAt(cur.ch) + line.charAt(cur.ch - 1), + Pos(cur.line, cur.ch - 1), Pos(cur.line, cur.ch + 1)); + }, + newlineAndIndent: function(cm) { + operation(cm, function() { + cm.replaceSelection("\n", "end", "+input"); + cm.indentLine(cm.getCursor().line, null, true); + })(); + }, + toggleOverwrite: function(cm) {cm.toggleOverwrite();} + }; + + // STANDARD KEYMAPS + + var keyMap = CodeMirror.keyMap = {}; + keyMap.basic = { + "Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown", + "End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown", + "Delete": "delCharAfter", "Backspace": "delCharBefore", "Tab": "defaultTab", "Shift-Tab": "indentAuto", + "Enter": "newlineAndIndent", "Insert": "toggleOverwrite" + }; + // Note that the save and find-related commands aren't defined by + // default. Unknown commands are simply ignored. + keyMap.pcDefault = { + "Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo", + "Ctrl-Home": "goDocStart", "Alt-Up": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Down": "goDocEnd", + "Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd", + "Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S": "save", "Ctrl-F": "find", + "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll", + "Ctrl-[": "indentLess", "Ctrl-]": "indentMore", + fallthrough: "basic" + }; + keyMap.macDefault = { + "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo", + "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft", + "Alt-Right": "goGroupRight", "Cmd-Left": "goLineStart", "Cmd-Right": "goLineEnd", "Alt-Backspace": "delGroupBefore", + "Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S": "save", "Cmd-F": "find", + "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll", + "Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delLineLeft", + fallthrough: ["basic", "emacsy"] + }; + keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault; + keyMap.emacsy = { + "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown", + "Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd", + "Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore", + "Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars" + }; + + // KEYMAP DISPATCH + + function getKeyMap(val) { + if (typeof val == "string") return keyMap[val]; + else return val; + } + + function lookupKey(name, maps, handle) { + function lookup(map) { + map = getKeyMap(map); + var found = map[name]; + if (found === false) return "stop"; + if (found != null && handle(found)) return true; + if (map.nofallthrough) return "stop"; + + var fallthrough = map.fallthrough; + if (fallthrough == null) return false; + if (Object.prototype.toString.call(fallthrough) != "[object Array]") + return lookup(fallthrough); + for (var i = 0, e = fallthrough.length; i < e; ++i) { + var done = lookup(fallthrough[i]); + if (done) return done; + } + return false; + } + + for (var i = 0; i < maps.length; ++i) { + var done = lookup(maps[i]); + if (done) return done != "stop"; + } + } + function isModifierKey(event) { + var name = keyNames[event.keyCode]; + return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod"; + } + function keyName(event, noShift) { + if (opera && event.keyCode == 34 && event["char"]) return false; + var name = keyNames[event.keyCode]; + if (name == null || event.altGraphKey) return false; + if (event.altKey) name = "Alt-" + name; + if (flipCtrlCmd ? event.metaKey : event.ctrlKey) name = "Ctrl-" + name; + if (flipCtrlCmd ? event.ctrlKey : event.metaKey) name = "Cmd-" + name; + if (!noShift && event.shiftKey) name = "Shift-" + name; + return name; + } + CodeMirror.lookupKey = lookupKey; + CodeMirror.isModifierKey = isModifierKey; + CodeMirror.keyName = keyName; + + // FROMTEXTAREA + + CodeMirror.fromTextArea = function(textarea, options) { + if (!options) options = {}; + options.value = textarea.value; + if (!options.tabindex && textarea.tabindex) + options.tabindex = textarea.tabindex; + if (!options.placeholder && textarea.placeholder) + options.placeholder = textarea.placeholder; + // Set autofocus to true if this textarea is focused, or if it has + // autofocus and no other element is focused. + if (options.autofocus == null) { + var hasFocus = document.body; + // doc.activeElement occasionally throws on IE + try { hasFocus = document.activeElement; } catch(e) {} + options.autofocus = hasFocus == textarea || + textarea.getAttribute("autofocus") != null && hasFocus == document.body; + } + + function save() {textarea.value = cm.getValue();} + if (textarea.form) { + on(textarea.form, "submit", save); + // Deplorable hack to make the submit method do the right thing. + if (!options.leaveSubmitMethodAlone) { + var form = textarea.form, realSubmit = form.submit; + try { + var wrappedSubmit = form.submit = function() { + save(); + form.submit = realSubmit; + form.submit(); + form.submit = wrappedSubmit; + }; + } catch(e) {} + } + } + + textarea.style.display = "none"; + var cm = CodeMirror(function(node) { + textarea.parentNode.insertBefore(node, textarea.nextSibling); + }, options); + cm.save = save; + cm.getTextArea = function() { return textarea; }; + cm.toTextArea = function() { + save(); + textarea.parentNode.removeChild(cm.getWrapperElement()); + textarea.style.display = ""; + if (textarea.form) { + off(textarea.form, "submit", save); + if (typeof textarea.form.submit == "function") + textarea.form.submit = realSubmit; + } + }; + return cm; + }; + + // STRING STREAM + + // Fed to the mode parsers, provides helper functions to make + // parsers more succinct. + + // The character stream used by a mode's parser. + function StringStream(string, tabSize) { + this.pos = this.start = 0; + this.string = string; + this.tabSize = tabSize || 8; + this.lastColumnPos = this.lastColumnValue = 0; + } + + StringStream.prototype = { + eol: function() {return this.pos >= this.string.length;}, + sol: function() {return this.pos == 0;}, + peek: function() {return this.string.charAt(this.pos) || undefined;}, + next: function() { + if (this.pos < this.string.length) + return this.string.charAt(this.pos++); + }, + eat: function(match) { + var ch = this.string.charAt(this.pos); + if (typeof match == "string") var ok = ch == match; + else var ok = ch && (match.test ? match.test(ch) : match(ch)); + if (ok) {++this.pos; return ch;} + }, + eatWhile: function(match) { + var start = this.pos; + while (this.eat(match)){} + return this.pos > start; + }, + eatSpace: function() { + var start = this.pos; + while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) ++this.pos; + return this.pos > start; + }, + skipToEnd: function() {this.pos = this.string.length;}, + skipTo: function(ch) { + var found = this.string.indexOf(ch, this.pos); + if (found > -1) {this.pos = found; return true;} + }, + backUp: function(n) {this.pos -= n;}, + column: function() { + if (this.lastColumnPos < this.start) { + this.lastColumnValue = countColumn(this.string, this.start, this.tabSize, this.lastColumnPos, this.lastColumnValue); + this.lastColumnPos = this.start; + } + return this.lastColumnValue; + }, + indentation: function() {return countColumn(this.string, null, this.tabSize);}, + match: function(pattern, consume, caseInsensitive) { + if (typeof pattern == "string") { + var cased = function(str) {return caseInsensitive ? str.toLowerCase() : str;}; + var substr = this.string.substr(this.pos, pattern.length); + if (cased(substr) == cased(pattern)) { + if (consume !== false) this.pos += pattern.length; + return true; + } + } else { + var match = this.string.slice(this.pos).match(pattern); + if (match && match.index > 0) return null; + if (match && consume !== false) this.pos += match[0].length; + return match; + } + }, + current: function(){return this.string.slice(this.start, this.pos);} + }; + CodeMirror.StringStream = StringStream; + + // TEXTMARKERS + + function TextMarker(doc, type) { + this.lines = []; + this.type = type; + this.doc = doc; + } + CodeMirror.TextMarker = TextMarker; + eventMixin(TextMarker); + + TextMarker.prototype.clear = function() { + if (this.explicitlyCleared) return; + var cm = this.doc.cm, withOp = cm && !cm.curOp; + if (withOp) startOperation(cm); + if (hasHandler(this, "clear")) { + var found = this.find(); + if (found) signalLater(this, "clear", found.from, found.to); + } + var min = null, max = null; + for (var i = 0; i < this.lines.length; ++i) { + var line = this.lines[i]; + var span = getMarkedSpanFor(line.markedSpans, this); + if (span.to != null) max = lineNo(line); + line.markedSpans = removeMarkedSpan(line.markedSpans, span); + if (span.from != null) + min = lineNo(line); + else if (this.collapsed && !lineIsHidden(this.doc, line) && cm) + updateLineHeight(line, textHeight(cm.display)); + } + if (cm && this.collapsed && !cm.options.lineWrapping) for (var i = 0; i < this.lines.length; ++i) { + var visual = visualLine(cm.doc, this.lines[i]), len = lineLength(cm.doc, visual); + if (len > cm.display.maxLineLength) { + cm.display.maxLine = visual; + cm.display.maxLineLength = len; + cm.display.maxLineChanged = true; + } + } + + if (min != null && cm) regChange(cm, min, max + 1); + this.lines.length = 0; + this.explicitlyCleared = true; + if (this.atomic && this.doc.cantEdit) { + this.doc.cantEdit = false; + if (cm) reCheckSelection(cm); + } + if (withOp) endOperation(cm); + }; + + TextMarker.prototype.find = function() { + var from, to; + for (var i = 0; i < this.lines.length; ++i) { + var line = this.lines[i]; + var span = getMarkedSpanFor(line.markedSpans, this); + if (span.from != null || span.to != null) { + var found = lineNo(line); + if (span.from != null) from = Pos(found, span.from); + if (span.to != null) to = Pos(found, span.to); + } + } + if (this.type == "bookmark") return from; + return from && {from: from, to: to}; + }; + + TextMarker.prototype.changed = function() { + var pos = this.find(), cm = this.doc.cm; + if (!pos || !cm) return; + var line = getLine(this.doc, pos.from.line); + clearCachedMeasurement(cm, line); + if (pos.from.line >= cm.display.showingFrom && pos.from.line < cm.display.showingTo) { + for (var node = cm.display.lineDiv.firstChild; node; node = node.nextSibling) if (node.lineObj == line) { + if (node.offsetHeight != line.height) updateLineHeight(line, node.offsetHeight); + break; + } + runInOp(cm, function() { + cm.curOp.selectionChanged = cm.curOp.forceUpdate = cm.curOp.updateMaxLine = true; + }); + } + }; + + TextMarker.prototype.attachLine = function(line) { + if (!this.lines.length && this.doc.cm) { + var op = this.doc.cm.curOp; + if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1) + (op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this); + } + this.lines.push(line); + }; + TextMarker.prototype.detachLine = function(line) { + this.lines.splice(indexOf(this.lines, line), 1); + if (!this.lines.length && this.doc.cm) { + var op = this.doc.cm.curOp; + (op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this); + } + }; + + function markText(doc, from, to, options, type) { + if (options && options.shared) return markTextShared(doc, from, to, options, type); + if (doc.cm && !doc.cm.curOp) return operation(doc.cm, markText)(doc, from, to, options, type); + + var marker = new TextMarker(doc, type); + if (type == "range" && !posLess(from, to)) return marker; + if (options) copyObj(options, marker); + if (marker.replacedWith) { + marker.collapsed = true; + marker.replacedWith = elt("span", [marker.replacedWith], "CodeMirror-widget"); + if (!options.handleMouseEvents) marker.replacedWith.ignoreEvents = true; + } + if (marker.collapsed) sawCollapsedSpans = true; + + if (marker.addToHistory) + addToHistory(doc, {from: from, to: to, origin: "markText"}, + {head: doc.sel.head, anchor: doc.sel.anchor}, NaN); + + var curLine = from.line, size = 0, collapsedAtStart, collapsedAtEnd, cm = doc.cm, updateMaxLine; + doc.iter(curLine, to.line + 1, function(line) { + if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(doc, line) == cm.display.maxLine) + updateMaxLine = true; + var span = {from: null, to: null, marker: marker}; + size += line.text.length; + if (curLine == from.line) {span.from = from.ch; size -= from.ch;} + if (curLine == to.line) {span.to = to.ch; size -= line.text.length - to.ch;} + if (marker.collapsed) { + if (curLine == to.line) collapsedAtEnd = collapsedSpanAt(line, to.ch); + if (curLine == from.line) collapsedAtStart = collapsedSpanAt(line, from.ch); + else updateLineHeight(line, 0); + } + addMarkedSpan(line, span); + ++curLine; + }); + if (marker.collapsed) doc.iter(from.line, to.line + 1, function(line) { + if (lineIsHidden(doc, line)) updateLineHeight(line, 0); + }); + + if (marker.clearOnEnter) on(marker, "beforeCursorEnter", function() { marker.clear(); }); + + if (marker.readOnly) { + sawReadOnlySpans = true; + if (doc.history.done.length || doc.history.undone.length) + doc.clearHistory(); + } + if (marker.collapsed) { + if (collapsedAtStart != collapsedAtEnd) + throw new Error("Inserting collapsed marker overlapping an existing one"); + marker.size = size; + marker.atomic = true; + } + if (cm) { + if (updateMaxLine) cm.curOp.updateMaxLine = true; + if (marker.className || marker.title || marker.startStyle || marker.endStyle || marker.collapsed) + regChange(cm, from.line, to.line + 1); + if (marker.atomic) reCheckSelection(cm); + } + return marker; + } + + // SHARED TEXTMARKERS + + function SharedTextMarker(markers, primary) { + this.markers = markers; + this.primary = primary; + for (var i = 0, me = this; i < markers.length; ++i) { + markers[i].parent = this; + on(markers[i], "clear", function(){me.clear();}); + } + } + CodeMirror.SharedTextMarker = SharedTextMarker; + eventMixin(SharedTextMarker); + + SharedTextMarker.prototype.clear = function() { + if (this.explicitlyCleared) return; + this.explicitlyCleared = true; + for (var i = 0; i < this.markers.length; ++i) + this.markers[i].clear(); + signalLater(this, "clear"); + }; + SharedTextMarker.prototype.find = function() { + return this.primary.find(); + }; + + function markTextShared(doc, from, to, options, type) { + options = copyObj(options); + options.shared = false; + var markers = [markText(doc, from, to, options, type)], primary = markers[0]; + var widget = options.replacedWith; + linkedDocs(doc, function(doc) { + if (widget) options.replacedWith = widget.cloneNode(true); + markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options, type)); + for (var i = 0; i < doc.linked.length; ++i) + if (doc.linked[i].isParent) return; + primary = lst(markers); + }); + return new SharedTextMarker(markers, primary); + } + + // TEXTMARKER SPANS + + function getMarkedSpanFor(spans, marker) { + if (spans) for (var i = 0; i < spans.length; ++i) { + var span = spans[i]; + if (span.marker == marker) return span; + } + } + function removeMarkedSpan(spans, span) { + for (var r, i = 0; i < spans.length; ++i) + if (spans[i] != span) (r || (r = [])).push(spans[i]); + return r; + } + function addMarkedSpan(line, span) { + line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [span]; + span.marker.attachLine(line); + } + + function markedSpansBefore(old, startCh, isInsert) { + if (old) for (var i = 0, nw; i < old.length; ++i) { + var span = old[i], marker = span.marker; + var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh); + if (startsBefore || marker.type == "bookmark" && span.from == startCh && (!isInsert || !span.marker.insertLeft)) { + var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= startCh : span.to > startCh); + (nw || (nw = [])).push({from: span.from, + to: endsAfter ? null : span.to, + marker: marker}); + } + } + return nw; + } + + function markedSpansAfter(old, endCh, isInsert) { + if (old) for (var i = 0, nw; i < old.length; ++i) { + var span = old[i], marker = span.marker; + var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= endCh : span.to > endCh); + if (endsAfter || marker.type == "bookmark" && span.from == endCh && (!isInsert || span.marker.insertLeft)) { + var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= endCh : span.from < endCh); + (nw || (nw = [])).push({from: startsBefore ? null : span.from - endCh, + to: span.to == null ? null : span.to - endCh, + marker: marker}); + } + } + return nw; + } + + function stretchSpansOverChange(doc, change) { + var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.line).markedSpans; + var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).markedSpans; + if (!oldFirst && !oldLast) return null; + + var startCh = change.from.ch, endCh = change.to.ch, isInsert = posEq(change.from, change.to); + // Get the spans that 'stick out' on both sides + var first = markedSpansBefore(oldFirst, startCh, isInsert); + var last = markedSpansAfter(oldLast, endCh, isInsert); + + // Next, merge those two ends + var sameLine = change.text.length == 1, offset = lst(change.text).length + (sameLine ? startCh : 0); + if (first) { + // Fix up .to properties of first + for (var i = 0; i < first.length; ++i) { + var span = first[i]; + if (span.to == null) { + var found = getMarkedSpanFor(last, span.marker); + if (!found) span.to = startCh; + else if (sameLine) span.to = found.to == null ? null : found.to + offset; + } + } + } + if (last) { + // Fix up .from in last (or move them into first in case of sameLine) + for (var i = 0; i < last.length; ++i) { + var span = last[i]; + if (span.to != null) span.to += offset; + if (span.from == null) { + var found = getMarkedSpanFor(first, span.marker); + if (!found) { + span.from = offset; + if (sameLine) (first || (first = [])).push(span); + } + } else { + span.from += offset; + if (sameLine) (first || (first = [])).push(span); + } + } + } + if (sameLine && first) { + // Make sure we didn't create any zero-length spans + for (var i = 0; i < first.length; ++i) + if (first[i].from != null && first[i].from == first[i].to && first[i].marker.type != "bookmark") + first.splice(i--, 1); + if (!first.length) first = null; + } + + var newMarkers = [first]; + if (!sameLine) { + // Fill gap with whole-line-spans + var gap = change.text.length - 2, gapMarkers; + if (gap > 0 && first) + for (var i = 0; i < first.length; ++i) + if (first[i].to == null) + (gapMarkers || (gapMarkers = [])).push({from: null, to: null, marker: first[i].marker}); + for (var i = 0; i < gap; ++i) + newMarkers.push(gapMarkers); + newMarkers.push(last); + } + return newMarkers; + } + + function mergeOldSpans(doc, change) { + var old = getOldSpans(doc, change); + var stretched = stretchSpansOverChange(doc, change); + if (!old) return stretched; + if (!stretched) return old; + + for (var i = 0; i < old.length; ++i) { + var oldCur = old[i], stretchCur = stretched[i]; + if (oldCur && stretchCur) { + spans: for (var j = 0; j < stretchCur.length; ++j) { + var span = stretchCur[j]; + for (var k = 0; k < oldCur.length; ++k) + if (oldCur[k].marker == span.marker) continue spans; + oldCur.push(span); + } + } else if (stretchCur) { + old[i] = stretchCur; + } + } + return old; + } + + function removeReadOnlyRanges(doc, from, to) { + var markers = null; + doc.iter(from.line, to.line + 1, function(line) { + if (line.markedSpans) for (var i = 0; i < line.markedSpans.length; ++i) { + var mark = line.markedSpans[i].marker; + if (mark.readOnly && (!markers || indexOf(markers, mark) == -1)) + (markers || (markers = [])).push(mark); + } + }); + if (!markers) return null; + var parts = [{from: from, to: to}]; + for (var i = 0; i < markers.length; ++i) { + var mk = markers[i], m = mk.find(); + for (var j = 0; j < parts.length; ++j) { + var p = parts[j]; + if (posLess(p.to, m.from) || posLess(m.to, p.from)) continue; + var newParts = [j, 1]; + if (posLess(p.from, m.from) || !mk.inclusiveLeft && posEq(p.from, m.from)) + newParts.push({from: p.from, to: m.from}); + if (posLess(m.to, p.to) || !mk.inclusiveRight && posEq(p.to, m.to)) + newParts.push({from: m.to, to: p.to}); + parts.splice.apply(parts, newParts); + j += newParts.length - 1; + } + } + return parts; + } + + function collapsedSpanAt(line, ch) { + var sps = sawCollapsedSpans && line.markedSpans, found; + if (sps) for (var sp, i = 0; i < sps.length; ++i) { + sp = sps[i]; + if (!sp.marker.collapsed) continue; + if ((sp.from == null || sp.from < ch) && + (sp.to == null || sp.to > ch) && + (!found || found.width < sp.marker.width)) + found = sp.marker; + } + return found; + } + function collapsedSpanAtStart(line) { return collapsedSpanAt(line, -1); } + function collapsedSpanAtEnd(line) { return collapsedSpanAt(line, line.text.length + 1); } + + function visualLine(doc, line) { + var merged; + while (merged = collapsedSpanAtStart(line)) + line = getLine(doc, merged.find().from.line); + return line; + } + + function lineIsHidden(doc, line) { + var sps = sawCollapsedSpans && line.markedSpans; + if (sps) for (var sp, i = 0; i < sps.length; ++i) { + sp = sps[i]; + if (!sp.marker.collapsed) continue; + if (sp.from == null) return true; + if (sp.marker.replacedWith) continue; + if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(doc, line, sp)) + return true; + } + } + function lineIsHiddenInner(doc, line, span) { + if (span.to == null) { + var end = span.marker.find().to, endLine = getLine(doc, end.line); + return lineIsHiddenInner(doc, endLine, getMarkedSpanFor(endLine.markedSpans, span.marker)); + } + if (span.marker.inclusiveRight && span.to == line.text.length) + return true; + for (var sp, i = 0; i < line.markedSpans.length; ++i) { + sp = line.markedSpans[i]; + if (sp.marker.collapsed && !sp.marker.replacedWith && sp.from == span.to && + (sp.marker.inclusiveLeft || span.marker.inclusiveRight) && + lineIsHiddenInner(doc, line, sp)) return true; + } + } + + function detachMarkedSpans(line) { + var spans = line.markedSpans; + if (!spans) return; + for (var i = 0; i < spans.length; ++i) + spans[i].marker.detachLine(line); + line.markedSpans = null; + } + + function attachMarkedSpans(line, spans) { + if (!spans) return; + for (var i = 0; i < spans.length; ++i) + spans[i].marker.attachLine(line); + line.markedSpans = spans; + } + + // LINE WIDGETS + + var LineWidget = CodeMirror.LineWidget = function(cm, node, options) { + if (options) for (var opt in options) if (options.hasOwnProperty(opt)) + this[opt] = options[opt]; + this.cm = cm; + this.node = node; + }; + eventMixin(LineWidget); + function widgetOperation(f) { + return function() { + var withOp = !this.cm.curOp; + if (withOp) startOperation(this.cm); + try {var result = f.apply(this, arguments);} + finally {if (withOp) endOperation(this.cm);} + return result; + }; + } + LineWidget.prototype.clear = widgetOperation(function() { + var ws = this.line.widgets, no = lineNo(this.line); + if (no == null || !ws) return; + for (var i = 0; i < ws.length; ++i) if (ws[i] == this) ws.splice(i--, 1); + if (!ws.length) this.line.widgets = null; + var aboveVisible = heightAtLine(this.cm, this.line) < this.cm.doc.scrollTop; + updateLineHeight(this.line, Math.max(0, this.line.height - widgetHeight(this))); + if (aboveVisible) addToScrollPos(this.cm, 0, -this.height); + regChange(this.cm, no, no + 1); + }); + LineWidget.prototype.changed = widgetOperation(function() { + var oldH = this.height; + this.height = null; + var diff = widgetHeight(this) - oldH; + if (!diff) return; + updateLineHeight(this.line, this.line.height + diff); + var no = lineNo(this.line); + regChange(this.cm, no, no + 1); + }); + + function widgetHeight(widget) { + if (widget.height != null) return widget.height; + if (!widget.node.parentNode || widget.node.parentNode.nodeType != 1) + removeChildrenAndAdd(widget.cm.display.measure, elt("div", [widget.node], null, "position: relative")); + return widget.height = widget.node.offsetHeight; + } + + function addLineWidget(cm, handle, node, options) { + var widget = new LineWidget(cm, node, options); + if (widget.noHScroll) cm.display.alignWidgets = true; + changeLine(cm, handle, function(line) { + var widgets = line.widgets || (line.widgets = []); + if (widget.insertAt == null) widgets.push(widget); + else widgets.splice(Math.min(widgets.length - 1, Math.max(0, widget.insertAt)), 0, widget); + widget.line = line; + if (!lineIsHidden(cm.doc, line) || widget.showIfHidden) { + var aboveVisible = heightAtLine(cm, line) < cm.doc.scrollTop; + updateLineHeight(line, line.height + widgetHeight(widget)); + if (aboveVisible) addToScrollPos(cm, 0, widget.height); + } + return true; + }); + return widget; + } + + // LINE DATA STRUCTURE + + // Line objects. These hold state related to a line, including + // highlighting info (the styles array). + var Line = CodeMirror.Line = function(text, markedSpans, estimateHeight) { + this.text = text; + attachMarkedSpans(this, markedSpans); + this.height = estimateHeight ? estimateHeight(this) : 1; + }; + eventMixin(Line); + + function updateLine(line, text, markedSpans, estimateHeight) { + line.text = text; + if (line.stateAfter) line.stateAfter = null; + if (line.styles) line.styles = null; + if (line.order != null) line.order = null; + detachMarkedSpans(line); + attachMarkedSpans(line, markedSpans); + var estHeight = estimateHeight ? estimateHeight(line) : 1; + if (estHeight != line.height) updateLineHeight(line, estHeight); + } + + function cleanUpLine(line) { + line.parent = null; + detachMarkedSpans(line); + } + + // Run the given mode's parser over a line, update the styles + // array, which contains alternating fragments of text and CSS + // classes. + function runMode(cm, text, mode, state, f) { + var flattenSpans = mode.flattenSpans; + if (flattenSpans == null) flattenSpans = cm.options.flattenSpans; + var curStart = 0, curStyle = null; + var stream = new StringStream(text, cm.options.tabSize), style; + if (text == "" && mode.blankLine) mode.blankLine(state); + while (!stream.eol()) { + if (stream.pos > cm.options.maxHighlightLength) { + flattenSpans = false; + // Webkit seems to refuse to render text nodes longer than 57444 characters + stream.pos = Math.min(text.length, stream.start + 50000); + style = null; + } else { + style = mode.token(stream, state); + } + if (!flattenSpans || curStyle != style) { + if (curStart < stream.start) f(stream.start, curStyle); + curStart = stream.start; curStyle = style; + } + stream.start = stream.pos; + } + if (curStart < stream.pos) f(stream.pos, curStyle); + } + + function highlightLine(cm, line, state) { + // A styles array always starts with a number identifying the + // mode/overlays that it is based on (for easy invalidation). + var st = [cm.state.modeGen]; + // Compute the base array of styles + runMode(cm, line.text, cm.doc.mode, state, function(end, style) {st.push(end, style);}); + + // Run overlays, adjust style array. + for (var o = 0; o < cm.state.overlays.length; ++o) { + var overlay = cm.state.overlays[o], i = 1, at = 0; + runMode(cm, line.text, overlay.mode, true, function(end, style) { + var start = i; + // Ensure there's a token end at the current position, and that i points at it + while (at < end) { + var i_end = st[i]; + if (i_end > end) + st.splice(i, 1, end, st[i+1], i_end); + i += 2; + at = Math.min(end, i_end); + } + if (!style) return; + if (overlay.opaque) { + st.splice(start, i - start, end, style); + i = start + 2; + } else { + for (; start < i; start += 2) { + var cur = st[start+1]; + st[start+1] = cur ? cur + " " + style : style; + } + } + }); + } + + return st; + } + + function getLineStyles(cm, line) { + if (!line.styles || line.styles[0] != cm.state.modeGen) + line.styles = highlightLine(cm, line, line.stateAfter = getStateBefore(cm, lineNo(line))); + return line.styles; + } + + // Lightweight form of highlight -- proceed over this line and + // update state, but don't save a style array. + function processLine(cm, line, state) { + var mode = cm.doc.mode; + var stream = new StringStream(line.text, cm.options.tabSize); + if (line.text == "" && mode.blankLine) mode.blankLine(state); + while (!stream.eol() && stream.pos <= cm.options.maxHighlightLength) { + mode.token(stream, state); + stream.start = stream.pos; + } + } + + var styleToClassCache = {}; + function styleToClass(style) { + if (!style) return null; + return styleToClassCache[style] || + (styleToClassCache[style] = "cm-" + style.replace(/ +/g, " cm-")); + } + + function lineContent(cm, realLine, measure, copyWidgets) { + var merged, line = realLine, empty = true; + while (merged = collapsedSpanAtStart(line)) + line = getLine(cm.doc, merged.find().from.line); + + var builder = {pre: elt("pre"), col: 0, pos: 0, + measure: null, measuredSomething: false, cm: cm, + copyWidgets: copyWidgets}; + if (line.textClass) builder.pre.className = line.textClass; + + do { + if (line.text) empty = false; + builder.measure = line == realLine && measure; + builder.pos = 0; + builder.addToken = builder.measure ? buildTokenMeasure : buildToken; + if ((ie || webkit) && cm.getOption("lineWrapping")) + builder.addToken = buildTokenSplitSpaces(builder.addToken); + var next = insertLineContent(line, builder, getLineStyles(cm, line)); + if (measure && line == realLine && !builder.measuredSomething) { + measure[0] = builder.pre.appendChild(zeroWidthElement(cm.display.measure)); + builder.measuredSomething = true; + } + if (next) line = getLine(cm.doc, next.to.line); + } while (next); + + if (measure && !builder.measuredSomething && !measure[0]) + measure[0] = builder.pre.appendChild(empty ? elt("span", "\u00a0") : zeroWidthElement(cm.display.measure)); + if (!builder.pre.firstChild && !lineIsHidden(cm.doc, realLine)) + builder.pre.appendChild(document.createTextNode("\u00a0")); + + var order; + // Work around problem with the reported dimensions of single-char + // direction spans on IE (issue #1129). See also the comment in + // cursorCoords. + if (measure && ie && (order = getOrder(line))) { + var l = order.length - 1; + if (order[l].from == order[l].to) --l; + var last = order[l], prev = order[l - 1]; + if (last.from + 1 == last.to && prev && last.level < prev.level) { + var span = measure[builder.pos - 1]; + if (span) span.parentNode.insertBefore(span.measureRight = zeroWidthElement(cm.display.measure), + span.nextSibling); + } + } + + signal(cm, "renderLine", cm, realLine, builder.pre); + return builder.pre; + } + + var tokenSpecialChars = /[\t\u0000-\u0019\u00ad\u200b\u2028\u2029\uFEFF]/g; + function buildToken(builder, text, style, startStyle, endStyle, title) { + if (!text) return; + if (!tokenSpecialChars.test(text)) { + builder.col += text.length; + var content = document.createTextNode(text); + } else { + var content = document.createDocumentFragment(), pos = 0; + while (true) { + tokenSpecialChars.lastIndex = pos; + var m = tokenSpecialChars.exec(text); + var skipped = m ? m.index - pos : text.length - pos; + if (skipped) { + content.appendChild(document.createTextNode(text.slice(pos, pos + skipped))); + builder.col += skipped; + } + if (!m) break; + pos += skipped + 1; + if (m[0] == "\t") { + var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize; + content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab")); + builder.col += tabWidth; + } else { + var token = elt("span", "\u2022", "cm-invalidchar"); + token.title = "\\u" + m[0].charCodeAt(0).toString(16); + content.appendChild(token); + builder.col += 1; + } + } + } + if (style || startStyle || endStyle || builder.measure) { + var fullStyle = style || ""; + if (startStyle) fullStyle += startStyle; + if (endStyle) fullStyle += endStyle; + var token = elt("span", [content], fullStyle); + if (title) token.title = title; + return builder.pre.appendChild(token); + } + builder.pre.appendChild(content); + } + + function buildTokenMeasure(builder, text, style, startStyle, endStyle) { + var wrapping = builder.cm.options.lineWrapping; + for (var i = 0; i < text.length; ++i) { + var ch = text.charAt(i), start = i == 0; + if (ch >= "\ud800" && ch < "\udbff" && i < text.length - 1) { + ch = text.slice(i, i + 2); + ++i; + } else if (i && wrapping && spanAffectsWrapping(text, i)) { + builder.pre.appendChild(elt("wbr")); + } + var old = builder.measure[builder.pos]; + var span = builder.measure[builder.pos] = + buildToken(builder, ch, style, + start && startStyle, i == text.length - 1 && endStyle); + if (old) span.leftSide = old.leftSide || old; + // In IE single-space nodes wrap differently than spaces + // embedded in larger text nodes, except when set to + // white-space: normal (issue #1268). + if (ie && wrapping && ch == " " && i && !/\s/.test(text.charAt(i - 1)) && + i < text.length - 1 && !/\s/.test(text.charAt(i + 1))) + span.style.whiteSpace = "normal"; + builder.pos += ch.length; + } + if (text.length) builder.measuredSomething = true; + } + + function buildTokenSplitSpaces(inner) { + function split(old) { + var out = " "; + for (var i = 0; i < old.length - 2; ++i) out += i % 2 ? " " : "\u00a0"; + out += " "; + return out; + } + return function(builder, text, style, startStyle, endStyle, title) { + return inner(builder, text.replace(/ {3,}/, split), style, startStyle, endStyle, title); + }; + } + + function buildCollapsedSpan(builder, size, marker, ignoreWidget) { + var widget = !ignoreWidget && marker.replacedWith; + if (widget) { + if (builder.copyWidgets) widget = widget.cloneNode(true); + builder.pre.appendChild(widget); + if (builder.measure) { + if (size) { + builder.measure[builder.pos] = widget; + } else { + var elt = builder.measure[builder.pos] = zeroWidthElement(builder.cm.display.measure); + if (marker.type != "bookmark" || marker.insertLeft) + builder.pre.insertBefore(elt, widget); + else + builder.pre.appendChild(elt); + } + builder.measuredSomething = true; + } + } + builder.pos += size; + } + + // Outputs a number of spans to make up a line, taking highlighting + // and marked text into account. + function insertLineContent(line, builder, styles) { + var spans = line.markedSpans, allText = line.text, at = 0; + if (!spans) { + for (var i = 1; i < styles.length; i+=2) + builder.addToken(builder, allText.slice(at, at = styles[i]), styleToClass(styles[i+1])); + return; + } + + var len = allText.length, pos = 0, i = 1, text = "", style; + var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, title, collapsed; + for (;;) { + if (nextChange == pos) { // Update current marker set + spanStyle = spanEndStyle = spanStartStyle = title = ""; + collapsed = null; nextChange = Infinity; + var foundBookmark = null; + for (var j = 0; j < spans.length; ++j) { + var sp = spans[j], m = sp.marker; + if (sp.from <= pos && (sp.to == null || sp.to > pos)) { + if (sp.to != null && nextChange > sp.to) { nextChange = sp.to; spanEndStyle = ""; } + if (m.className) spanStyle += " " + m.className; + if (m.startStyle && sp.from == pos) spanStartStyle += " " + m.startStyle; + if (m.endStyle && sp.to == nextChange) spanEndStyle += " " + m.endStyle; + if (m.title && !title) title = m.title; + if (m.collapsed && (!collapsed || collapsed.marker.size < m.size)) + collapsed = sp; + } else if (sp.from > pos && nextChange > sp.from) { + nextChange = sp.from; + } + if (m.type == "bookmark" && sp.from == pos && m.replacedWith) foundBookmark = m; + } + if (collapsed && (collapsed.from || 0) == pos) { + buildCollapsedSpan(builder, (collapsed.to == null ? len : collapsed.to) - pos, + collapsed.marker, collapsed.from == null); + if (collapsed.to == null) return collapsed.marker.find(); + } + if (foundBookmark && !collapsed) buildCollapsedSpan(builder, 0, foundBookmark); + } + if (pos >= len) break; + + var upto = Math.min(len, nextChange); + while (true) { + if (text) { + var end = pos + text.length; + if (!collapsed) { + var tokenText = end > upto ? text.slice(0, upto - pos) : text; + builder.addToken(builder, tokenText, style ? style + spanStyle : spanStyle, + spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "", title); + } + if (end >= upto) {text = text.slice(upto - pos); pos = upto; break;} + pos = end; + spanStartStyle = ""; + } + text = allText.slice(at, at = styles[i++]); + style = styleToClass(styles[i++]); + } + } + } + + // DOCUMENT DATA STRUCTURE + + function updateDoc(doc, change, markedSpans, selAfter, estimateHeight) { + function spansFor(n) {return markedSpans ? markedSpans[n] : null;} + function update(line, text, spans) { + updateLine(line, text, spans, estimateHeight); + signalLater(line, "change", line, change); + } + + var from = change.from, to = change.to, text = change.text; + var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line); + var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to.line - from.line; + + // First adjust the line structure + if (from.ch == 0 && to.ch == 0 && lastText == "") { + // This is a whole-line replace. Treated specially to make + // sure line objects move the way they are supposed to. + for (var i = 0, e = text.length - 1, added = []; i < e; ++i) + added.push(new Line(text[i], spansFor(i), estimateHeight)); + update(lastLine, lastLine.text, lastSpans); + if (nlines) doc.remove(from.line, nlines); + if (added.length) doc.insert(from.line, added); + } else if (firstLine == lastLine) { + if (text.length == 1) { + update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLine.text.slice(to.ch), lastSpans); + } else { + for (var added = [], i = 1, e = text.length - 1; i < e; ++i) + added.push(new Line(text[i], spansFor(i), estimateHeight)); + added.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, estimateHeight)); + update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0)); + doc.insert(from.line + 1, added); + } + } else if (text.length == 1) { + update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.text.slice(to.ch), spansFor(0)); + doc.remove(from.line + 1, nlines); + } else { + update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0)); + update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans); + for (var i = 1, e = text.length - 1, added = []; i < e; ++i) + added.push(new Line(text[i], spansFor(i), estimateHeight)); + if (nlines > 1) doc.remove(from.line + 1, nlines - 1); + doc.insert(from.line + 1, added); + } + + signalLater(doc, "change", doc, change); + setSelection(doc, selAfter.anchor, selAfter.head, null, true); + } + + function LeafChunk(lines) { + this.lines = lines; + this.parent = null; + for (var i = 0, e = lines.length, height = 0; i < e; ++i) { + lines[i].parent = this; + height += lines[i].height; + } + this.height = height; + } + + LeafChunk.prototype = { + chunkSize: function() { return this.lines.length; }, + removeInner: function(at, n) { + for (var i = at, e = at + n; i < e; ++i) { + var line = this.lines[i]; + this.height -= line.height; + cleanUpLine(line); + signalLater(line, "delete"); + } + this.lines.splice(at, n); + }, + collapse: function(lines) { + lines.splice.apply(lines, [lines.length, 0].concat(this.lines)); + }, + insertInner: function(at, lines, height) { + this.height += height; + this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice(at)); + for (var i = 0, e = lines.length; i < e; ++i) lines[i].parent = this; + }, + iterN: function(at, n, op) { + for (var e = at + n; at < e; ++at) + if (op(this.lines[at])) return true; + } + }; + + function BranchChunk(children) { + this.children = children; + var size = 0, height = 0; + for (var i = 0, e = children.length; i < e; ++i) { + var ch = children[i]; + size += ch.chunkSize(); height += ch.height; + ch.parent = this; + } + this.size = size; + this.height = height; + this.parent = null; + } + + BranchChunk.prototype = { + chunkSize: function() { return this.size; }, + removeInner: function(at, n) { + this.size -= n; + for (var i = 0; i < this.children.length; ++i) { + var child = this.children[i], sz = child.chunkSize(); + if (at < sz) { + var rm = Math.min(n, sz - at), oldHeight = child.height; + child.removeInner(at, rm); + this.height -= oldHeight - child.height; + if (sz == rm) { this.children.splice(i--, 1); child.parent = null; } + if ((n -= rm) == 0) break; + at = 0; + } else at -= sz; + } + if (this.size - n < 25) { + var lines = []; + this.collapse(lines); + this.children = [new LeafChunk(lines)]; + this.children[0].parent = this; + } + }, + collapse: function(lines) { + for (var i = 0, e = this.children.length; i < e; ++i) this.children[i].collapse(lines); + }, + insertInner: function(at, lines, height) { + this.size += lines.length; + this.height += height; + for (var i = 0, e = this.children.length; i < e; ++i) { + var child = this.children[i], sz = child.chunkSize(); + if (at <= sz) { + child.insertInner(at, lines, height); + if (child.lines && child.lines.length > 50) { + while (child.lines.length > 50) { + var spilled = child.lines.splice(child.lines.length - 25, 25); + var newleaf = new LeafChunk(spilled); + child.height -= newleaf.height; + this.children.splice(i + 1, 0, newleaf); + newleaf.parent = this; + } + this.maybeSpill(); + } + break; + } + at -= sz; + } + }, + maybeSpill: function() { + if (this.children.length <= 10) return; + var me = this; + do { + var spilled = me.children.splice(me.children.length - 5, 5); + var sibling = new BranchChunk(spilled); + if (!me.parent) { // Become the parent node + var copy = new BranchChunk(me.children); + copy.parent = me; + me.children = [copy, sibling]; + me = copy; + } else { + me.size -= sibling.size; + me.height -= sibling.height; + var myIndex = indexOf(me.parent.children, me); + me.parent.children.splice(myIndex + 1, 0, sibling); + } + sibling.parent = me.parent; + } while (me.children.length > 10); + me.parent.maybeSpill(); + }, + iterN: function(at, n, op) { + for (var i = 0, e = this.children.length; i < e; ++i) { + var child = this.children[i], sz = child.chunkSize(); + if (at < sz) { + var used = Math.min(n, sz - at); + if (child.iterN(at, used, op)) return true; + if ((n -= used) == 0) break; + at = 0; + } else at -= sz; + } + } + }; + + var nextDocId = 0; + var Doc = CodeMirror.Doc = function(text, mode, firstLine) { + if (!(this instanceof Doc)) return new Doc(text, mode, firstLine); + if (firstLine == null) firstLine = 0; + + BranchChunk.call(this, [new LeafChunk([new Line("", null)])]); + this.first = firstLine; + this.scrollTop = this.scrollLeft = 0; + this.cantEdit = false; + this.history = makeHistory(); + this.cleanGeneration = 1; + this.frontier = firstLine; + var start = Pos(firstLine, 0); + this.sel = {from: start, to: start, head: start, anchor: start, shift: false, extend: false, goalColumn: null}; + this.id = ++nextDocId; + this.modeOption = mode; + + if (typeof text == "string") text = splitLines(text); + updateDoc(this, {from: start, to: start, text: text}, null, {head: start, anchor: start}); + }; + + Doc.prototype = createObj(BranchChunk.prototype, { + constructor: Doc, + iter: function(from, to, op) { + if (op) this.iterN(from - this.first, to - from, op); + else this.iterN(this.first, this.first + this.size, from); + }, + + insert: function(at, lines) { + var height = 0; + for (var i = 0, e = lines.length; i < e; ++i) height += lines[i].height; + this.insertInner(at - this.first, lines, height); + }, + remove: function(at, n) { this.removeInner(at - this.first, n); }, + + getValue: function(lineSep) { + var lines = getLines(this, this.first, this.first + this.size); + if (lineSep === false) return lines; + return lines.join(lineSep || "\n"); + }, + setValue: function(code) { + var top = Pos(this.first, 0), last = this.first + this.size - 1; + makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length), + text: splitLines(code), origin: "setValue"}, + {head: top, anchor: top}, true); + }, + replaceRange: function(code, from, to, origin) { + from = clipPos(this, from); + to = to ? clipPos(this, to) : from; + replaceRange(this, code, from, to, origin); + }, + getRange: function(from, to, lineSep) { + var lines = getBetween(this, clipPos(this, from), clipPos(this, to)); + if (lineSep === false) return lines; + return lines.join(lineSep || "\n"); + }, + + getLine: function(line) {var l = this.getLineHandle(line); return l && l.text;}, + setLine: function(line, text) { + if (isLine(this, line)) + replaceRange(this, text, Pos(line, 0), clipPos(this, Pos(line))); + }, + removeLine: function(line) { + if (line) replaceRange(this, "", clipPos(this, Pos(line - 1)), clipPos(this, Pos(line))); + else replaceRange(this, "", Pos(0, 0), clipPos(this, Pos(1, 0))); + }, + + getLineHandle: function(line) {if (isLine(this, line)) return getLine(this, line);}, + getLineNumber: function(line) {return lineNo(line);}, + + getLineHandleVisualStart: function(line) { + if (typeof line == "number") line = getLine(this, line); + return visualLine(this, line); + }, + + lineCount: function() {return this.size;}, + firstLine: function() {return this.first;}, + lastLine: function() {return this.first + this.size - 1;}, + + clipPos: function(pos) {return clipPos(this, pos);}, + + getCursor: function(start) { + var sel = this.sel, pos; + if (start == null || start == "head") pos = sel.head; + else if (start == "anchor") pos = sel.anchor; + else if (start == "end" || start === false) pos = sel.to; + else pos = sel.from; + return copyPos(pos); + }, + somethingSelected: function() {return !posEq(this.sel.head, this.sel.anchor);}, + + setCursor: docOperation(function(line, ch, extend) { + var pos = clipPos(this, typeof line == "number" ? Pos(line, ch || 0) : line); + if (extend) extendSelection(this, pos); + else setSelection(this, pos, pos); + }), + setSelection: docOperation(function(anchor, head) { + setSelection(this, clipPos(this, anchor), clipPos(this, head || anchor)); + }), + extendSelection: docOperation(function(from, to) { + extendSelection(this, clipPos(this, from), to && clipPos(this, to)); + }), + + getSelection: function(lineSep) {return this.getRange(this.sel.from, this.sel.to, lineSep);}, + replaceSelection: function(code, collapse, origin) { + makeChange(this, {from: this.sel.from, to: this.sel.to, text: splitLines(code), origin: origin}, collapse || "around"); + }, + undo: docOperation(function() {makeChangeFromHistory(this, "undo");}), + redo: docOperation(function() {makeChangeFromHistory(this, "redo");}), + + setExtending: function(val) {this.sel.extend = val;}, + + historySize: function() { + var hist = this.history; + return {undo: hist.done.length, redo: hist.undone.length}; + }, + clearHistory: function() {this.history = makeHistory(this.history.maxGeneration);}, + + markClean: function() { + this.cleanGeneration = this.changeGeneration(); + }, + changeGeneration: function() { + this.history.lastOp = this.history.lastOrigin = null; + return this.history.generation; + }, + isClean: function (gen) { + return this.history.generation == (gen || this.cleanGeneration); + }, + + getHistory: function() { + return {done: copyHistoryArray(this.history.done), + undone: copyHistoryArray(this.history.undone)}; + }, + setHistory: function(histData) { + var hist = this.history = makeHistory(this.history.maxGeneration); + hist.done = histData.done.slice(0); + hist.undone = histData.undone.slice(0); + }, + + markText: function(from, to, options) { + return markText(this, clipPos(this, from), clipPos(this, to), options, "range"); + }, + setBookmark: function(pos, options) { + var realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options), + insertLeft: options && options.insertLeft}; + pos = clipPos(this, pos); + return markText(this, pos, pos, realOpts, "bookmark"); + }, + findMarksAt: function(pos) { + pos = clipPos(this, pos); + var markers = [], spans = getLine(this, pos.line).markedSpans; + if (spans) for (var i = 0; i < spans.length; ++i) { + var span = spans[i]; + if ((span.from == null || span.from <= pos.ch) && + (span.to == null || span.to >= pos.ch)) + markers.push(span.marker.parent || span.marker); + } + return markers; + }, + getAllMarks: function() { + var markers = []; + this.iter(function(line) { + var sps = line.markedSpans; + if (sps) for (var i = 0; i < sps.length; ++i) + if (sps[i].from != null) markers.push(sps[i].marker); + }); + return markers; + }, + + posFromIndex: function(off) { + var ch, lineNo = this.first; + this.iter(function(line) { + var sz = line.text.length + 1; + if (sz > off) { ch = off; return true; } + off -= sz; + ++lineNo; + }); + return clipPos(this, Pos(lineNo, ch)); + }, + indexFromPos: function (coords) { + coords = clipPos(this, coords); + var index = coords.ch; + if (coords.line < this.first || coords.ch < 0) return 0; + this.iter(this.first, coords.line, function (line) { + index += line.text.length + 1; + }); + return index; + }, + + copy: function(copyHistory) { + var doc = new Doc(getLines(this, this.first, this.first + this.size), this.modeOption, this.first); + doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft; + doc.sel = {from: this.sel.from, to: this.sel.to, head: this.sel.head, anchor: this.sel.anchor, + shift: this.sel.shift, extend: false, goalColumn: this.sel.goalColumn}; + if (copyHistory) { + doc.history.undoDepth = this.history.undoDepth; + doc.setHistory(this.getHistory()); + } + return doc; + }, + + linkedDoc: function(options) { + if (!options) options = {}; + var from = this.first, to = this.first + this.size; + if (options.from != null && options.from > from) from = options.from; + if (options.to != null && options.to < to) to = options.to; + var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from); + if (options.sharedHist) copy.history = this.history; + (this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.sharedHist}); + copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}]; + return copy; + }, + unlinkDoc: function(other) { + if (other instanceof CodeMirror) other = other.doc; + if (this.linked) for (var i = 0; i < this.linked.length; ++i) { + var link = this.linked[i]; + if (link.doc != other) continue; + this.linked.splice(i, 1); + other.unlinkDoc(this); + break; + } + // If the histories were shared, split them again + if (other.history == this.history) { + var splitIds = [other.id]; + linkedDocs(other, function(doc) {splitIds.push(doc.id);}, true); + other.history = makeHistory(); + other.history.done = copyHistoryArray(this.history.done, splitIds); + other.history.undone = copyHistoryArray(this.history.undone, splitIds); + } + }, + iterLinkedDocs: function(f) {linkedDocs(this, f);}, + + getMode: function() {return this.mode;}, + getEditor: function() {return this.cm;} + }); + + Doc.prototype.eachLine = Doc.prototype.iter; + + // The Doc methods that should be available on CodeMirror instances + var dontDelegate = "iter insert remove copy getEditor".split(" "); + for (var prop in Doc.prototype) if (Doc.prototype.hasOwnProperty(prop) && indexOf(dontDelegate, prop) < 0) + CodeMirror.prototype[prop] = (function(method) { + return function() {return method.apply(this.doc, arguments);}; + })(Doc.prototype[prop]); + + eventMixin(Doc); + + function linkedDocs(doc, f, sharedHistOnly) { + function propagate(doc, skip, sharedHist) { + if (doc.linked) for (var i = 0; i < doc.linked.length; ++i) { + var rel = doc.linked[i]; + if (rel.doc == skip) continue; + var shared = sharedHist && rel.sharedHist; + if (sharedHistOnly && !shared) continue; + f(rel.doc, shared); + propagate(rel.doc, doc, shared); + } + } + propagate(doc, null, true); + } + + function attachDoc(cm, doc) { + if (doc.cm) throw new Error("This document is already in use."); + cm.doc = doc; + doc.cm = cm; + estimateLineHeights(cm); + loadMode(cm); + if (!cm.options.lineWrapping) computeMaxLength(cm); + cm.options.mode = doc.modeOption; + regChange(cm); + } + + // LINE UTILITIES + + function getLine(chunk, n) { + n -= chunk.first; + while (!chunk.lines) { + for (var i = 0;; ++i) { + var child = chunk.children[i], sz = child.chunkSize(); + if (n < sz) { chunk = child; break; } + n -= sz; + } + } + return chunk.lines[n]; + } + + function getBetween(doc, start, end) { + var out = [], n = start.line; + doc.iter(start.line, end.line + 1, function(line) { + var text = line.text; + if (n == end.line) text = text.slice(0, end.ch); + if (n == start.line) text = text.slice(start.ch); + out.push(text); + ++n; + }); + return out; + } + function getLines(doc, from, to) { + var out = []; + doc.iter(from, to, function(line) { out.push(line.text); }); + return out; + } + + function updateLineHeight(line, height) { + var diff = height - line.height; + for (var n = line; n; n = n.parent) n.height += diff; + } + + function lineNo(line) { + if (line.parent == null) return null; + var cur = line.parent, no = indexOf(cur.lines, line); + for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) { + for (var i = 0;; ++i) { + if (chunk.children[i] == cur) break; + no += chunk.children[i].chunkSize(); + } + } + return no + cur.first; + } + + function lineAtHeight(chunk, h) { + var n = chunk.first; + outer: do { + for (var i = 0, e = chunk.children.length; i < e; ++i) { + var child = chunk.children[i], ch = child.height; + if (h < ch) { chunk = child; continue outer; } + h -= ch; + n += child.chunkSize(); + } + return n; + } while (!chunk.lines); + for (var i = 0, e = chunk.lines.length; i < e; ++i) { + var line = chunk.lines[i], lh = line.height; + if (h < lh) break; + h -= lh; + } + return n + i; + } + + function heightAtLine(cm, lineObj) { + lineObj = visualLine(cm.doc, lineObj); + + var h = 0, chunk = lineObj.parent; + for (var i = 0; i < chunk.lines.length; ++i) { + var line = chunk.lines[i]; + if (line == lineObj) break; + else h += line.height; + } + for (var p = chunk.parent; p; chunk = p, p = chunk.parent) { + for (var i = 0; i < p.children.length; ++i) { + var cur = p.children[i]; + if (cur == chunk) break; + else h += cur.height; + } + } + return h; + } + + function getOrder(line) { + var order = line.order; + if (order == null) order = line.order = bidiOrdering(line.text); + return order; + } + + // HISTORY + + function makeHistory(startGen) { + return { + // Arrays of history events. Doing something adds an event to + // done and clears undo. Undoing moves events from done to + // undone, redoing moves them in the other direction. + done: [], undone: [], undoDepth: Infinity, + // Used to track when changes can be merged into a single undo + // event + lastTime: 0, lastOp: null, lastOrigin: null, + // Used by the isClean() method + generation: startGen || 1, maxGeneration: startGen || 1 + }; + } + + function attachLocalSpans(doc, change, from, to) { + var existing = change["spans_" + doc.id], n = 0; + doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), function(line) { + if (line.markedSpans) + (existing || (existing = change["spans_" + doc.id] = {}))[n] = line.markedSpans; + ++n; + }); + } + + function historyChangeFromChange(doc, change) { + var from = { line: change.from.line, ch: change.from.ch }; + var histChange = {from: from, to: changeEnd(change), text: getBetween(doc, change.from, change.to)}; + attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1); + linkedDocs(doc, function(doc) {attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);}, true); + return histChange; + } + + function addToHistory(doc, change, selAfter, opId) { + var hist = doc.history; + hist.undone.length = 0; + var time = +new Date, cur = lst(hist.done); + + if (cur && + (hist.lastOp == opId || + hist.lastOrigin == change.origin && change.origin && + ((change.origin.charAt(0) == "+" && doc.cm && hist.lastTime > time - doc.cm.options.historyEventDelay) || + change.origin.charAt(0) == "*"))) { + // Merge this change into the last event + var last = lst(cur.changes); + if (posEq(change.from, change.to) && posEq(change.from, last.to)) { + // Optimized case for simple insertion -- don't want to add + // new changesets for every character typed + last.to = changeEnd(change); + } else { + // Add new sub-event + cur.changes.push(historyChangeFromChange(doc, change)); + } + cur.anchorAfter = selAfter.anchor; cur.headAfter = selAfter.head; + } else { + // Can not be merged, start a new event. + cur = {changes: [historyChangeFromChange(doc, change)], + generation: hist.generation, + anchorBefore: doc.sel.anchor, headBefore: doc.sel.head, + anchorAfter: selAfter.anchor, headAfter: selAfter.head}; + hist.done.push(cur); + hist.generation = ++hist.maxGeneration; + while (hist.done.length > hist.undoDepth) + hist.done.shift(); + } + hist.lastTime = time; + hist.lastOp = opId; + hist.lastOrigin = change.origin; + } + + function removeClearedSpans(spans) { + if (!spans) return null; + for (var i = 0, out; i < spans.length; ++i) { + if (spans[i].marker.explicitlyCleared) { if (!out) out = spans.slice(0, i); } + else if (out) out.push(spans[i]); + } + return !out ? spans : out.length ? out : null; + } + + function getOldSpans(doc, change) { + var found = change["spans_" + doc.id]; + if (!found) return null; + for (var i = 0, nw = []; i < change.text.length; ++i) + nw.push(removeClearedSpans(found[i])); + return nw; + } + + // Used both to provide a JSON-safe object in .getHistory, and, when + // detaching a document, to split the history in two + function copyHistoryArray(events, newGroup) { + for (var i = 0, copy = []; i < events.length; ++i) { + var event = events[i], changes = event.changes, newChanges = []; + copy.push({changes: newChanges, anchorBefore: event.anchorBefore, headBefore: event.headBefore, + anchorAfter: event.anchorAfter, headAfter: event.headAfter}); + for (var j = 0; j < changes.length; ++j) { + var change = changes[j], m; + newChanges.push({from: change.from, to: change.to, text: change.text}); + if (newGroup) for (var prop in change) if (m = prop.match(/^spans_(\d+)$/)) { + if (indexOf(newGroup, Number(m[1])) > -1) { + lst(newChanges)[prop] = change[prop]; + delete change[prop]; + } + } + } + } + return copy; + } + + // Rebasing/resetting history to deal with externally-sourced changes + + function rebaseHistSel(pos, from, to, diff) { + if (to < pos.line) { + pos.line += diff; + } else if (from < pos.line) { + pos.line = from; + pos.ch = 0; + } + } + + // Tries to rebase an array of history events given a change in the + // document. If the change touches the same lines as the event, the + // event, and everything 'behind' it, is discarded. If the change is + // before the event, the event's positions are updated. Uses a + // copy-on-write scheme for the positions, to avoid having to + // reallocate them all on every rebase, but also avoid problems with + // shared position objects being unsafely updated. + function rebaseHistArray(array, from, to, diff) { + for (var i = 0; i < array.length; ++i) { + var sub = array[i], ok = true; + for (var j = 0; j < sub.changes.length; ++j) { + var cur = sub.changes[j]; + if (!sub.copied) { cur.from = copyPos(cur.from); cur.to = copyPos(cur.to); } + if (to < cur.from.line) { + cur.from.line += diff; + cur.to.line += diff; + } else if (from <= cur.to.line) { + ok = false; + break; + } + } + if (!sub.copied) { + sub.anchorBefore = copyPos(sub.anchorBefore); sub.headBefore = copyPos(sub.headBefore); + sub.anchorAfter = copyPos(sub.anchorAfter); sub.readAfter = copyPos(sub.headAfter); + sub.copied = true; + } + if (!ok) { + array.splice(0, i + 1); + i = 0; + } else { + rebaseHistSel(sub.anchorBefore); rebaseHistSel(sub.headBefore); + rebaseHistSel(sub.anchorAfter); rebaseHistSel(sub.headAfter); + } + } + } + + function rebaseHist(hist, change) { + var from = change.from.line, to = change.to.line, diff = change.text.length - (to - from) - 1; + rebaseHistArray(hist.done, from, to, diff); + rebaseHistArray(hist.undone, from, to, diff); + } + + // EVENT OPERATORS + + function stopMethod() {e_stop(this);} + // Ensure an event has a stop method. + function addStop(event) { + if (!event.stop) event.stop = stopMethod; + return event; + } + + function e_preventDefault(e) { + if (e.preventDefault) e.preventDefault(); + else e.returnValue = false; + } + function e_stopPropagation(e) { + if (e.stopPropagation) e.stopPropagation(); + else e.cancelBubble = true; + } + function e_defaultPrevented(e) { + return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == false; + } + function e_stop(e) {e_preventDefault(e); e_stopPropagation(e);} + CodeMirror.e_stop = e_stop; + CodeMirror.e_preventDefault = e_preventDefault; + CodeMirror.e_stopPropagation = e_stopPropagation; + + function e_target(e) {return e.target || e.srcElement;} + function e_button(e) { + var b = e.which; + if (b == null) { + if (e.button & 1) b = 1; + else if (e.button & 2) b = 3; + else if (e.button & 4) b = 2; + } + if (mac && e.ctrlKey && b == 1) b = 3; + return b; + } + + // EVENT HANDLING + + function on(emitter, type, f) { + if (emitter.addEventListener) + emitter.addEventListener(type, f, false); + else if (emitter.attachEvent) + emitter.attachEvent("on" + type, f); + else { + var map = emitter._handlers || (emitter._handlers = {}); + var arr = map[type] || (map[type] = []); + arr.push(f); + } + } + + function off(emitter, type, f) { + if (emitter.removeEventListener) + emitter.removeEventListener(type, f, false); + else if (emitter.detachEvent) + emitter.detachEvent("on" + type, f); + else { + var arr = emitter._handlers && emitter._handlers[type]; + if (!arr) return; + for (var i = 0; i < arr.length; ++i) + if (arr[i] == f) { arr.splice(i, 1); break; } + } + } + + function signal(emitter, type /*, values...*/) { + var arr = emitter._handlers && emitter._handlers[type]; + if (!arr) return; + var args = Array.prototype.slice.call(arguments, 2); + for (var i = 0; i < arr.length; ++i) arr[i].apply(null, args); + } + + var delayedCallbacks, delayedCallbackDepth = 0; + function signalLater(emitter, type /*, values...*/) { + var arr = emitter._handlers && emitter._handlers[type]; + if (!arr) return; + var args = Array.prototype.slice.call(arguments, 2); + if (!delayedCallbacks) { + ++delayedCallbackDepth; + delayedCallbacks = []; + setTimeout(fireDelayed, 0); + } + function bnd(f) {return function(){f.apply(null, args);};}; + for (var i = 0; i < arr.length; ++i) + delayedCallbacks.push(bnd(arr[i])); + } + + function signalDOMEvent(cm, e, override) { + signal(cm, override || e.type, cm, e); + return e_defaultPrevented(e) || e.codemirrorIgnore; + } + + function fireDelayed() { + --delayedCallbackDepth; + var delayed = delayedCallbacks; + delayedCallbacks = null; + for (var i = 0; i < delayed.length; ++i) delayed[i](); + } + + function hasHandler(emitter, type) { + var arr = emitter._handlers && emitter._handlers[type]; + return arr && arr.length > 0; + } + + CodeMirror.on = on; CodeMirror.off = off; CodeMirror.signal = signal; + + function eventMixin(ctor) { + ctor.prototype.on = function(type, f) {on(this, type, f);}; + ctor.prototype.off = function(type, f) {off(this, type, f);}; + } + + // MISC UTILITIES + + // Number of pixels added to scroller and sizer to hide scrollbar + var scrollerCutOff = 30; + + // Returned or thrown by various protocols to signal 'I'm not + // handling this'. + var Pass = CodeMirror.Pass = {toString: function(){return "CodeMirror.Pass";}}; + + function Delayed() {this.id = null;} + Delayed.prototype = {set: function(ms, f) {clearTimeout(this.id); this.id = setTimeout(f, ms);}}; + + // Counts the column offset in a string, taking tabs into account. + // Used mostly to find indentation. + function countColumn(string, end, tabSize, startIndex, startValue) { + if (end == null) { + end = string.search(/[^\s\u00a0]/); + if (end == -1) end = string.length; + } + for (var i = startIndex || 0, n = startValue || 0; i < end; ++i) { + if (string.charAt(i) == "\t") n += tabSize - (n % tabSize); + else ++n; + } + return n; + } + CodeMirror.countColumn = countColumn; + + var spaceStrs = [""]; + function spaceStr(n) { + while (spaceStrs.length <= n) + spaceStrs.push(lst(spaceStrs) + " "); + return spaceStrs[n]; + } + + function lst(arr) { return arr[arr.length-1]; } + + function selectInput(node) { + if (ios) { // Mobile Safari apparently has a bug where select() is broken. + node.selectionStart = 0; + node.selectionEnd = node.value.length; + } else { + // Suppress mysterious IE10 errors + try { node.select(); } + catch(_e) {} + } + } + + function indexOf(collection, elt) { + if (collection.indexOf) return collection.indexOf(elt); + for (var i = 0, e = collection.length; i < e; ++i) + if (collection[i] == elt) return i; + return -1; + } + + function createObj(base, props) { + function Obj() {} + Obj.prototype = base; + var inst = new Obj(); + if (props) copyObj(props, inst); + return inst; + } + + function copyObj(obj, target) { + if (!target) target = {}; + for (var prop in obj) if (obj.hasOwnProperty(prop)) target[prop] = obj[prop]; + return target; + } + + function emptyArray(size) { + for (var a = [], i = 0; i < size; ++i) a.push(undefined); + return a; + } + + function bind(f) { + var args = Array.prototype.slice.call(arguments, 1); + return function(){return f.apply(null, args);}; + } + + var nonASCIISingleCaseWordChar = /[\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/; + function isWordChar(ch) { + return /\w/.test(ch) || ch > "\x80" && + (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch)); + } + + function isEmpty(obj) { + for (var n in obj) if (obj.hasOwnProperty(n) && obj[n]) return false; + return true; + } + + var isExtendingChar = /[\u0300-\u036F\u0483-\u0487\u0488-\u0489\u0591-\u05BD\u05BF\u05C1-\u05C2\u05C4-\u05C5\u05C7\u0610-\u061A\u064B-\u065F\u0670\u06D6-\u06DC\u06DF-\u06E4\u06E7-\u06E8\u06EA-\u06ED\uA66F\uA670-\uA672\uA674-\uA67D\uA69F\udc00-\udfff]/; + + // DOM UTILITIES + + function elt(tag, content, className, style) { + var e = document.createElement(tag); + if (className) e.className = className; + if (style) e.style.cssText = style; + if (typeof content == "string") setTextContent(e, content); + else if (content) for (var i = 0; i < content.length; ++i) e.appendChild(content[i]); + return e; + } + + function removeChildren(e) { + for (var count = e.childNodes.length; count > 0; --count) + e.removeChild(e.firstChild); + return e; + } + + function removeChildrenAndAdd(parent, e) { + return removeChildren(parent).appendChild(e); + } + + function setTextContent(e, str) { + if (ie_lt9) { + e.innerHTML = ""; + e.appendChild(document.createTextNode(str)); + } else e.textContent = str; + } + + function getRect(node) { + return node.getBoundingClientRect(); + } + CodeMirror.replaceGetRect = function(f) { getRect = f; }; + + // FEATURE DETECTION + + // Detect drag-and-drop + var dragAndDrop = function() { + // There is *some* kind of drag-and-drop support in IE6-8, but I + // couldn't get it to work yet. + if (ie_lt9) return false; + var div = elt('div'); + return "draggable" in div || "dragDrop" in div; + }(); + + // For a reason I have yet to figure out, some browsers disallow + // word wrapping between certain characters *only* if a new inline + // element is started between them. This makes it hard to reliably + // measure the position of things, since that requires inserting an + // extra span. This terribly fragile set of tests matches the + // character combinations that suffer from this phenomenon on the + // various browsers. + function spanAffectsWrapping() { return false; } + if (gecko) // Only for "$'" + spanAffectsWrapping = function(str, i) { + return str.charCodeAt(i - 1) == 36 && str.charCodeAt(i) == 39; + }; + else if (safari && !/Version\/([6-9]|\d\d)\b/.test(navigator.userAgent)) + spanAffectsWrapping = function(str, i) { + return /\-[^ \-?]|\?[^ !\'\"\),.\-\/:;\?\]\}]/.test(str.slice(i - 1, i + 1)); + }; + else if (webkit && !/Chrome\/(?:29|[3-9]\d|\d\d\d)\./.test(navigator.userAgent)) + spanAffectsWrapping = function(str, i) { + if (i > 1 && str.charCodeAt(i - 1) == 45) { + if (/\w/.test(str.charAt(i - 2)) && /[^\-?\.]/.test(str.charAt(i))) return true; + if (i > 2 && /[\d\.,]/.test(str.charAt(i - 2)) && /[\d\.,]/.test(str.charAt(i))) return false; + } + return /[~!#%&*)=+}\]|\"\.>,:;][({[<]|-[^\-?\.\u2010-\u201f\u2026]|\?[\w~`@#$%\^&*(_=+{[|><]|…[\w~`@#$%\^&*(_=+{[><]/.test(str.slice(i - 1, i + 1)); + }; + + var knownScrollbarWidth; + function scrollbarWidth(measure) { + if (knownScrollbarWidth != null) return knownScrollbarWidth; + var test = elt("div", null, null, "width: 50px; height: 50px; overflow-x: scroll"); + removeChildrenAndAdd(measure, test); + if (test.offsetWidth) + knownScrollbarWidth = test.offsetHeight - test.clientHeight; + return knownScrollbarWidth || 0; + } + + var zwspSupported; + function zeroWidthElement(measure) { + if (zwspSupported == null) { + var test = elt("span", "\u200b"); + removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")])); + if (measure.firstChild.offsetHeight != 0) + zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !ie_lt8; + } + if (zwspSupported) return elt("span", "\u200b"); + else return elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px"); + } + + // See if "".split is the broken IE version, if so, provide an + // alternative way to split lines. + var splitLines = "\n\nb".split(/\n/).length != 3 ? function(string) { + var pos = 0, result = [], l = string.length; + while (pos <= l) { + var nl = string.indexOf("\n", pos); + if (nl == -1) nl = string.length; + var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl); + var rt = line.indexOf("\r"); + if (rt != -1) { + result.push(line.slice(0, rt)); + pos += rt + 1; + } else { + result.push(line); + pos = nl + 1; + } + } + return result; + } : function(string){return string.split(/\r\n?|\n/);}; + CodeMirror.splitLines = splitLines; + + var hasSelection = window.getSelection ? function(te) { + try { return te.selectionStart != te.selectionEnd; } + catch(e) { return false; } + } : function(te) { + try {var range = te.ownerDocument.selection.createRange();} + catch(e) {} + if (!range || range.parentElement() != te) return false; + return range.compareEndPoints("StartToEnd", range) != 0; + }; + + var hasCopyEvent = (function() { + var e = elt("div"); + if ("oncopy" in e) return true; + e.setAttribute("oncopy", "return;"); + return typeof e.oncopy == 'function'; + })(); + + // KEY NAMING + + var keyNames = {3: "Enter", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt", + 19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End", + 36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert", + 46: "Delete", 59: ";", 91: "Mod", 92: "Mod", 93: "Mod", 109: "-", 107: "=", 127: "Delete", + 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\", + 221: "]", 222: "'", 63276: "PageUp", 63277: "PageDown", 63275: "End", 63273: "Home", + 63234: "Left", 63232: "Up", 63235: "Right", 63233: "Down", 63302: "Insert", 63272: "Delete"}; + CodeMirror.keyNames = keyNames; + (function() { + // Number keys + for (var i = 0; i < 10; i++) keyNames[i + 48] = String(i); + // Alphabetic keys + for (var i = 65; i <= 90; i++) keyNames[i] = String.fromCharCode(i); + // Function keys + for (var i = 1; i <= 12; i++) keyNames[i + 111] = keyNames[i + 63235] = "F" + i; + })(); + + // BIDI HELPERS + + function iterateBidiSections(order, from, to, f) { + if (!order) return f(from, to, "ltr"); + var found = false; + for (var i = 0; i < order.length; ++i) { + var part = order[i]; + if (part.from < to && part.to > from || from == to && part.to == from) { + f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "rtl" : "ltr"); + found = true; + } + } + if (!found) f(from, to, "ltr"); + } + + function bidiLeft(part) { return part.level % 2 ? part.to : part.from; } + function bidiRight(part) { return part.level % 2 ? part.from : part.to; } + + function lineLeft(line) { var order = getOrder(line); return order ? bidiLeft(order[0]) : 0; } + function lineRight(line) { + var order = getOrder(line); + if (!order) return line.text.length; + return bidiRight(lst(order)); + } + + function lineStart(cm, lineN) { + var line = getLine(cm.doc, lineN); + var visual = visualLine(cm.doc, line); + if (visual != line) lineN = lineNo(visual); + var order = getOrder(visual); + var ch = !order ? 0 : order[0].level % 2 ? lineRight(visual) : lineLeft(visual); + return Pos(lineN, ch); + } + function lineEnd(cm, lineN) { + var merged, line; + while (merged = collapsedSpanAtEnd(line = getLine(cm.doc, lineN))) + lineN = merged.find().to.line; + var order = getOrder(line); + var ch = !order ? line.text.length : order[0].level % 2 ? lineLeft(line) : lineRight(line); + return Pos(lineN, ch); + } + + function compareBidiLevel(order, a, b) { + var linedir = order[0].level; + if (a == linedir) return true; + if (b == linedir) return false; + return a < b; + } + var bidiOther; + function getBidiPartAt(order, pos) { + for (var i = 0, found; i < order.length; ++i) { + var cur = order[i]; + if (cur.from < pos && cur.to > pos) { bidiOther = null; return i; } + if (cur.from == pos || cur.to == pos) { + if (found == null) { + found = i; + } else if (compareBidiLevel(order, cur.level, order[found].level)) { + bidiOther = found; + return i; + } else { + bidiOther = i; + return found; + } + } + } + bidiOther = null; + return found; + } + + function moveInLine(line, pos, dir, byUnit) { + if (!byUnit) return pos + dir; + do pos += dir; + while (pos > 0 && isExtendingChar.test(line.text.charAt(pos))); + return pos; + } + + // This is somewhat involved. It is needed in order to move + // 'visually' through bi-directional text -- i.e., pressing left + // should make the cursor go left, even when in RTL text. The + // tricky part is the 'jumps', where RTL and LTR text touch each + // other. This often requires the cursor offset to move more than + // one unit, in order to visually move one unit. + function moveVisually(line, start, dir, byUnit) { + var bidi = getOrder(line); + if (!bidi) return moveLogically(line, start, dir, byUnit); + var pos = getBidiPartAt(bidi, start), part = bidi[pos]; + var target = moveInLine(line, start, part.level % 2 ? -dir : dir, byUnit); + + for (;;) { + if (target > part.from && target < part.to) return target; + if (target == part.from || target == part.to) { + if (getBidiPartAt(bidi, target) == pos) return target; + part = bidi[pos += dir]; + return (dir > 0) == part.level % 2 ? part.to : part.from; + } else { + part = bidi[pos += dir]; + if (!part) return null; + if ((dir > 0) == part.level % 2) + target = moveInLine(line, part.to, -1, byUnit); + else + target = moveInLine(line, part.from, 1, byUnit); + } + } + } + + function moveLogically(line, start, dir, byUnit) { + var target = start + dir; + if (byUnit) while (target > 0 && isExtendingChar.test(line.text.charAt(target))) target += dir; + return target < 0 || target > line.text.length ? null : target; + } + + // Bidirectional ordering algorithm + // See http://unicode.org/reports/tr9/tr9-13.html for the algorithm + // that this (partially) implements. + + // One-char codes used for character types: + // L (L): Left-to-Right + // R (R): Right-to-Left + // r (AL): Right-to-Left Arabic + // 1 (EN): European Number + // + (ES): European Number Separator + // % (ET): European Number Terminator + // n (AN): Arabic Number + // , (CS): Common Number Separator + // m (NSM): Non-Spacing Mark + // b (BN): Boundary Neutral + // s (B): Paragraph Separator + // t (S): Segment Separator + // w (WS): Whitespace + // N (ON): Other Neutrals + + // Returns null if characters are ordered as they appear + // (left-to-right), or an array of sections ({from, to, level} + // objects) in the order in which they occur visually. + var bidiOrdering = (function() { + // Character types for codepoints 0 to 0xff + var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbbbbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLL"; + // Character types for codepoints 0x600 to 0x6ff + var arabicTypes = "rrrrrrrrrrrr,rNNmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmrrrrrrrnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmNmmmmrrrrrrrrrrrrrrrrrr"; + function charType(code) { + if (code <= 0xff) return lowTypes.charAt(code); + else if (0x590 <= code && code <= 0x5f4) return "R"; + else if (0x600 <= code && code <= 0x6ff) return arabicTypes.charAt(code - 0x600); + else if (0x700 <= code && code <= 0x8ac) return "r"; + else return "L"; + } + + var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/; + var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, countsAsNum = /[1n]/; + // Browsers seem to always treat the boundaries of block elements as being L. + var outerType = "L"; + + return function(str) { + if (!bidiRE.test(str)) return false; + var len = str.length, types = []; + for (var i = 0, type; i < len; ++i) + types.push(type = charType(str.charCodeAt(i))); + + // W1. Examine each non-spacing mark (NSM) in the level run, and + // change the type of the NSM to the type of the previous + // character. If the NSM is at the start of the level run, it will + // get the type of sor. + for (var i = 0, prev = outerType; i < len; ++i) { + var type = types[i]; + if (type == "m") types[i] = prev; + else prev = type; + } + + // W2. Search backwards from each instance of a European number + // until the first strong type (R, L, AL, or sor) is found. If an + // AL is found, change the type of the European number to Arabic + // number. + // W3. Change all ALs to R. + for (var i = 0, cur = outerType; i < len; ++i) { + var type = types[i]; + if (type == "1" && cur == "r") types[i] = "n"; + else if (isStrong.test(type)) { cur = type; if (type == "r") types[i] = "R"; } + } + + // W4. A single European separator between two European numbers + // changes to a European number. A single common separator between + // two numbers of the same type changes to that type. + for (var i = 1, prev = types[0]; i < len - 1; ++i) { + var type = types[i]; + if (type == "+" && prev == "1" && types[i+1] == "1") types[i] = "1"; + else if (type == "," && prev == types[i+1] && + (prev == "1" || prev == "n")) types[i] = prev; + prev = type; + } + + // W5. A sequence of European terminators adjacent to European + // numbers changes to all European numbers. + // W6. Otherwise, separators and terminators change to Other + // Neutral. + for (var i = 0; i < len; ++i) { + var type = types[i]; + if (type == ",") types[i] = "N"; + else if (type == "%") { + for (var end = i + 1; end < len && types[end] == "%"; ++end) {} + var replace = (i && types[i-1] == "!") || (end < len - 1 && types[end] == "1") ? "1" : "N"; + for (var j = i; j < end; ++j) types[j] = replace; + i = end - 1; + } + } + + // W7. Search backwards from each instance of a European number + // until the first strong type (R, L, or sor) is found. If an L is + // found, then change the type of the European number to L. + for (var i = 0, cur = outerType; i < len; ++i) { + var type = types[i]; + if (cur == "L" && type == "1") types[i] = "L"; + else if (isStrong.test(type)) cur = type; + } + + // N1. A sequence of neutrals takes the direction of the + // surrounding strong text if the text on both sides has the same + // direction. European and Arabic numbers act as if they were R in + // terms of their influence on neutrals. Start-of-level-run (sor) + // and end-of-level-run (eor) are used at level run boundaries. + // N2. Any remaining neutrals take the embedding direction. + for (var i = 0; i < len; ++i) { + if (isNeutral.test(types[i])) { + for (var end = i + 1; end < len && isNeutral.test(types[end]); ++end) {} + var before = (i ? types[i-1] : outerType) == "L"; + var after = (end < len - 1 ? types[end] : outerType) == "L"; + var replace = before || after ? "L" : "R"; + for (var j = i; j < end; ++j) types[j] = replace; + i = end - 1; + } + } + + // Here we depart from the documented algorithm, in order to avoid + // building up an actual levels array. Since there are only three + // levels (0, 1, 2) in an implementation that doesn't take + // explicit embedding into account, we can build up the order on + // the fly, without following the level-based algorithm. + var order = [], m; + for (var i = 0; i < len;) { + if (countsAsLeft.test(types[i])) { + var start = i; + for (++i; i < len && countsAsLeft.test(types[i]); ++i) {} + order.push({from: start, to: i, level: 0}); + } else { + var pos = i, at = order.length; + for (++i; i < len && types[i] != "L"; ++i) {} + for (var j = pos; j < i;) { + if (countsAsNum.test(types[j])) { + if (pos < j) order.splice(at, 0, {from: pos, to: j, level: 1}); + var nstart = j; + for (++j; j < i && countsAsNum.test(types[j]); ++j) {} + order.splice(at, 0, {from: nstart, to: j, level: 2}); + pos = j; + } else ++j; + } + if (pos < i) order.splice(at, 0, {from: pos, to: i, level: 1}); + } + } + if (order[0].level == 1 && (m = str.match(/^\s+/))) { + order[0].from = m[0].length; + order.unshift({from: 0, to: m[0].length, level: 0}); + } + if (lst(order).level == 1 && (m = str.match(/\s+$/))) { + lst(order).to -= m[0].length; + order.push({from: len - m[0].length, to: len, level: 0}); + } + if (order[0].level != lst(order).level) + order.push({from: len, to: len, level: order[0].level}); + + return order; + }; + })(); + + // THE END + + CodeMirror.version = "3.15.0"; + + return CodeMirror; +})(); diff --git a/common/static/js/vendor/CodeMirror/codemirror.js b/common/static/js/vendor/CodeMirror/codemirror.js index d345d64a26..3230f93b34 100644 --- a/common/static/js/vendor/CodeMirror/codemirror.js +++ b/common/static/js/vendor/CodeMirror/codemirror.js @@ -1,2150 +1,3527 @@ -// CodeMirror version 2.23 (with edits) -// -// All functions that need access to the editor's state live inside -// the CodeMirror function. Below that, at the bottom of the file, -// some utilities are defined. - // CodeMirror is the only global var we claim -var CodeMirror = (function() { - // This is the function that produces an editor instance. Its - // closure is used to store the editor state. - function CodeMirror(place, givenOptions) { - // Determine effective options based on given values and defaults. - var options = {}, defaults = CodeMirror.defaults; - for (var opt in defaults) - if (defaults.hasOwnProperty(opt)) - options[opt] = (givenOptions && givenOptions.hasOwnProperty(opt) ? givenOptions : defaults)[opt]; +window.CodeMirror = (function() { + "use strict"; + // BROWSER SNIFFING + + // Crude, but necessary to handle a number of hard-to-feature-detect + // bugs and behavior differences. + var gecko = /gecko\/\d/i.test(navigator.userAgent); + // IE11 currently doesn't count as 'ie', since it has almost none of + // the same bugs as earlier versions. Use ie_gt10 to handle + // incompatibilities in that version. + var old_ie = /MSIE \d/.test(navigator.userAgent); + var ie_lt8 = old_ie && (document.documentMode == null || document.documentMode < 8); + var ie_lt9 = old_ie && (document.documentMode == null || document.documentMode < 9); + var ie_gt10 = /Trident\/([7-9]|\d{2,})\./.test(navigator.userAgent); + var ie = old_ie || ie_gt10; + var webkit = /WebKit\//.test(navigator.userAgent); + var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(navigator.userAgent); + var chrome = /Chrome\//.test(navigator.userAgent); + var opera = /Opera\//.test(navigator.userAgent); + var safari = /Apple Computer/.test(navigator.vendor); + var khtml = /KHTML\//.test(navigator.userAgent); + var mac_geLion = /Mac OS X 1\d\D([7-9]|\d\d)\D/.test(navigator.userAgent); + var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(navigator.userAgent); + var phantom = /PhantomJS/.test(navigator.userAgent); + + var ios = /AppleWebKit/.test(navigator.userAgent) && /Mobile\/\w+/.test(navigator.userAgent); + // This is woefully incomplete. Suggestions for alternative methods welcome. + var mobile = ios || /Android|webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(navigator.userAgent); + var mac = ios || /Mac/.test(navigator.platform); + var windows = /win/i.test(navigator.platform); + + var opera_version = opera && navigator.userAgent.match(/Version\/(\d*\.\d*)/); + if (opera_version) opera_version = Number(opera_version[1]); + if (opera_version && opera_version >= 15) { opera = false; webkit = true; } + // Some browsers use the wrong event properties to signal cmd/ctrl on OS X + var flipCtrlCmd = mac && (qtwebkit || opera && (opera_version == null || opera_version < 12.11)); + var captureMiddleClick = gecko || (old_ie && !ie_lt9); + + // Optimize some code when these features are not used + var sawReadOnlySpans = false, sawCollapsedSpans = false; + + // CONSTRUCTOR + + function CodeMirror(place, options) { + if (!(this instanceof CodeMirror)) return new CodeMirror(place, options); + + this.options = options = options || {}; + // Determine effective options based on given values and defaults. + for (var opt in defaults) if (!options.hasOwnProperty(opt) && defaults.hasOwnProperty(opt)) + options[opt] = defaults[opt]; + setGuttersForLineNumbers(options); + + var docStart = typeof options.value == "string" ? 0 : options.value.first; + var display = this.display = makeDisplay(place, docStart); + display.wrapper.CodeMirror = this; + updateGutters(this); + if (options.autofocus && !mobile) focusInput(this); + + this.state = {keyMaps: [], + overlays: [], + modeGen: 0, + overwrite: false, focused: false, + suppressEdits: false, + pasteIncoming: false, cutIncoming: false, + draggingText: false, + highlight: new Delayed()}; + + themeChanged(this); + if (options.lineWrapping) + this.display.wrapper.className += " CodeMirror-wrap"; + + var doc = options.value; + if (typeof doc == "string") doc = new Doc(options.value, options.mode); + operation(this, attachDoc)(this, doc); + + // Override magic textarea content restore that IE sometimes does + // on our hidden textarea on reload + if (old_ie) setTimeout(bind(resetInput, this, true), 20); + + registerEventHandlers(this); + // IE throws unspecified error in certain cases, when + // trying to access activeElement before onload + var hasFocus; try { hasFocus = (document.activeElement == display.input); } catch(e) { } + if (hasFocus || (options.autofocus && !mobile)) setTimeout(bind(onFocus, this), 20); + else onBlur(this); + + operation(this, function() { + for (var opt in optionHandlers) + if (optionHandlers.propertyIsEnumerable(opt)) + optionHandlers[opt](this, options[opt], Init); + for (var i = 0; i < initHooks.length; ++i) initHooks[i](this); + })(); + } + + // DISPLAY CONSTRUCTOR + + function makeDisplay(place, docStart) { + var d = {}; + + var input = d.input = elt("textarea", null, null, "position: absolute; padding: 0; width: 1px; height: 1em; outline: none; font-size: 4px;"); + if (webkit) input.style.width = "1000px"; + else input.setAttribute("wrap", "off"); + // if border: 0; -- iOS fails to open keyboard (issue #1287) + if (ios) input.style.border = "1px solid black"; + input.setAttribute("autocorrect", "off"); input.setAttribute("autocapitalize", "off"); input.setAttribute("spellcheck", "false"); + + // Wraps and hides input textarea + d.inputDiv = elt("div", [input], null, "overflow: hidden; position: relative; width: 3px; height: 0px;"); + // The actual fake scrollbars. + d.scrollbarH = elt("div", [elt("div", null, null, "height: 1px")], "CodeMirror-hscrollbar"); + d.scrollbarV = elt("div", [elt("div", null, null, "width: 1px")], "CodeMirror-vscrollbar"); + d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler"); + d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler"); + // DIVs containing the selection and the actual code + d.lineDiv = elt("div", null, "CodeMirror-code"); + d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1"); + // Blinky cursor, and element used to ensure cursor fits at the end of a line + d.cursor = elt("div", "\u00a0", "CodeMirror-cursor"); + // Secondary cursor, shown when on a 'jump' in bi-directional text + d.otherCursor = elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor"); + // Used to measure text size + d.measure = elt("div", null, "CodeMirror-measure"); + // Wraps everything that needs to exist inside the vertically-padded coordinate system + d.lineSpace = elt("div", [d.measure, d.selectionDiv, d.lineDiv, d.cursor, d.otherCursor], + null, "position: relative; outline: none"); + // Moved around its parent to cover visible view + d.mover = elt("div", [elt("div", [d.lineSpace], "CodeMirror-lines")], null, "position: relative"); + // Set to the height of the text, causes scrolling + d.sizer = elt("div", [d.mover], "CodeMirror-sizer"); + // D is needed because behavior of elts with overflow: auto and padding is inconsistent across browsers + d.heightForcer = elt("div", null, null, "position: absolute; height: " + scrollerCutOff + "px; width: 1px;"); + // Will contain the gutters, if any + d.gutters = elt("div", null, "CodeMirror-gutters"); + d.lineGutter = null; + // Provides scrolling + d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-scroll"); + d.scroller.setAttribute("tabIndex", "-1"); // The element in which the editor lives. - var wrapper = document.createElement("div"); - wrapper.className = "CodeMirror" + (options.lineWrapping ? " CodeMirror-wrap" : ""); - // This mess creates the base DOM structure for the editor. - wrapper.innerHTML = - '
' + // Wraps and hides input textarea - '
' + - '
' + - '
' + // Set to the height of the text, causes scrolling - '
' + // Moved around its parent to cover visible view - '
' + - // Provides positioning relative to (visible) text origin - '
' + - '
' + - '
 
' + // Absolutely positioned blinky cursor - '
' + // DIVs containing the selection and the actual code - '
'; - if (place.appendChild) place.appendChild(wrapper); else place(wrapper); - // I've never seen more elegant code in my life. - var inputDiv = wrapper.firstChild, input = inputDiv.firstChild, - scroller = wrapper.lastChild, code = scroller.firstChild, - mover = code.firstChild, gutter = mover.firstChild, gutterText = gutter.firstChild, - lineSpace = gutter.nextSibling.firstChild, measure = lineSpace.firstChild, - cursor = measure.nextSibling, selectionDiv = cursor.nextSibling, - lineDiv = selectionDiv.nextSibling; - themeChanged(); + d.wrapper = elt("div", [d.inputDiv, d.scrollbarH, d.scrollbarV, + d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror"); + // Work around IE7 z-index bug + if (ie_lt8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0; } + if (place.appendChild) place.appendChild(d.wrapper); else place(d.wrapper); + // Needed to hide big blue blinking cursor on Mobile Safari if (ios) input.style.width = "0px"; - if (!webkit) lineSpace.draggable = true; - lineSpace.style.outline = "none"; - if (options.tabindex != null) input.tabIndex = options.tabindex; - if (options.autofocus) focusInput(); - if (!options.gutter && !options.lineNumbers) gutter.style.display = "none"; + if (!webkit) d.scroller.draggable = true; // Needed to handle Tab key in KHTML - if (khtml) inputDiv.style.height = "1px", inputDiv.style.position = "absolute"; + if (khtml) { d.inputDiv.style.height = "1px"; d.inputDiv.style.position = "absolute"; } + // Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8). + else if (ie_lt8) d.scrollbarH.style.minWidth = d.scrollbarV.style.minWidth = "18px"; - // Check for problem with IE innerHTML not working when we have a - // P (or similar) parent node. - try { stringWidth("x"); } - catch (e) { - if (e.message.match(/runtime/i)) - e = new Error("A CodeMirror inside a P-style element does not work in Internet Explorer. (innerHTML bug)"); - throw e; - } - - // Delayed object wrap timeouts, making sure only one is active. blinker holds an interval. - var poll = new Delayed(), highlight = new Delayed(), blinker; - - // mode holds a mode API object. doc is the tree of Line objects, - // work an array of lines that should be parsed, and history the - // undo history (instance of History constructor). - var mode, doc = new BranchChunk([new LeafChunk([new Line("")])]), work, focused; - loadMode(); - // The selection. These are always maintained to point at valid - // positions. Inverted is used to remember that the user is - // selecting bottom-to-top. - var sel = {from: {line: 0, ch: 0}, to: {line: 0, ch: 0}, inverted: false}; - // Selection-related flags. shiftSelecting obviously tracks - // whether the user is holding shift. - var shiftSelecting, lastClick, lastDoubleClick, lastScrollPos = 0, draggingText, - overwrite = false, suppressEdits = false; - // Variables used by startOperation/endOperation to track what - // happened during the operation. - var updateInput, userSelChange, changes, textChanged, selectionChanged, leaveInputAlone, - gutterDirty, callbacks; // Current visible range (may be bigger than the view window). - var displayOffset = 0, showingFrom = 0, showingTo = 0, lastSizeC = 0; - // bracketHighlighted is used to remember that a bracket has been - // marked. - var bracketHighlighted; + d.viewOffset = d.lastSizeC = 0; + d.showingFrom = d.showingTo = docStart; + + // Used to only resize the line number gutter when necessary (when + // the amount of lines crosses a boundary that makes its width change) + d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null; + // See readInput and resetInput + d.prevInput = ""; + // Set to true when a non-horizontal-scrolling widget is added. As + // an optimization, widget aligning is skipped when d is false. + d.alignWidgets = false; + // Flag that indicates whether we currently expect input to appear + // (after some event like 'keypress' or 'input') and are polling + // intensively. + d.pollingFast = false; + // Self-resetting timeout for the poller + d.poll = new Delayed(); + + d.cachedCharWidth = d.cachedTextHeight = null; + d.measureLineCache = []; + d.measureLineCachePos = 0; + + // Tracks when resetInput has punted to just putting a short + // string instead of the (large) selection. + d.inaccurateSelection = false; + // Tracks the maximum line length so that the horizontal scrollbar // can be kept static when scrolling. - var maxLine = "", maxWidth; - var tabCache = {}; + d.maxLine = null; + d.maxLineLength = 0; + d.maxLineChanged = false; - // Initialize the content. - operation(function(){setValue(options.value || ""); updateInput = false;})(); - var history = new History(); + // Used for measuring wheel scrolling granularity + d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null; - // Register our event handlers. - connect(scroller, "mousedown", operation(onMouseDown)); - connect(scroller, "dblclick", operation(onDoubleClick)); - connect(lineSpace, "dragstart", onDragStart); - connect(lineSpace, "selectstart", e_preventDefault); + return d; + } + + // STATE UPDATES + + // Used to get the editor into a consistent state again when options change. + + function loadMode(cm) { + cm.doc.mode = CodeMirror.getMode(cm.options, cm.doc.modeOption); + resetModeState(cm); + } + + function resetModeState(cm) { + cm.doc.iter(function(line) { + if (line.stateAfter) line.stateAfter = null; + if (line.styles) line.styles = null; + }); + cm.doc.frontier = cm.doc.first; + startWorker(cm, 100); + cm.state.modeGen++; + if (cm.curOp) regChange(cm); + } + + function wrappingChanged(cm) { + if (cm.options.lineWrapping) { + cm.display.wrapper.className += " CodeMirror-wrap"; + cm.display.sizer.style.minWidth = ""; + } else { + cm.display.wrapper.className = cm.display.wrapper.className.replace(" CodeMirror-wrap", ""); + computeMaxLength(cm); + } + estimateLineHeights(cm); + regChange(cm); + clearCaches(cm); + setTimeout(function(){updateScrollbars(cm);}, 100); + } + + function estimateHeight(cm) { + var th = textHeight(cm.display), wrapping = cm.options.lineWrapping; + var perLine = wrapping && Math.max(5, cm.display.scroller.clientWidth / charWidth(cm.display) - 3); + return function(line) { + if (lineIsHidden(cm.doc, line)) + return 0; + else if (wrapping) + return (Math.ceil(line.text.length / perLine) || 1) * th; + else + return th; + }; + } + + function estimateLineHeights(cm) { + var doc = cm.doc, est = estimateHeight(cm); + doc.iter(function(line) { + var estHeight = est(line); + if (estHeight != line.height) updateLineHeight(line, estHeight); + }); + } + + function keyMapChanged(cm) { + var map = keyMap[cm.options.keyMap], style = map.style; + cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-keymap-\S+/g, "") + + (style ? " cm-keymap-" + style : ""); + } + + function themeChanged(cm) { + cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s-\S+/g, "") + + cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-"); + clearCaches(cm); + } + + function guttersChanged(cm) { + updateGutters(cm); + regChange(cm); + setTimeout(function(){alignHorizontally(cm);}, 20); + } + + function updateGutters(cm) { + var gutters = cm.display.gutters, specs = cm.options.gutters; + removeChildren(gutters); + for (var i = 0; i < specs.length; ++i) { + var gutterClass = specs[i]; + var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + gutterClass)); + if (gutterClass == "CodeMirror-linenumbers") { + cm.display.lineGutter = gElt; + gElt.style.width = (cm.display.lineNumWidth || 1) + "px"; + } + } + gutters.style.display = i ? "" : "none"; + } + + function lineLength(doc, line) { + if (line.height == 0) return 0; + var len = line.text.length, merged, cur = line; + while (merged = collapsedSpanAtStart(cur)) { + var found = merged.find(); + cur = getLine(doc, found.from.line); + len += found.from.ch - found.to.ch; + } + cur = line; + while (merged = collapsedSpanAtEnd(cur)) { + var found = merged.find(); + len -= cur.text.length - found.from.ch; + cur = getLine(doc, found.to.line); + len += cur.text.length - found.to.ch; + } + return len; + } + + function computeMaxLength(cm) { + var d = cm.display, doc = cm.doc; + d.maxLine = getLine(doc, doc.first); + d.maxLineLength = lineLength(doc, d.maxLine); + d.maxLineChanged = true; + doc.iter(function(line) { + var len = lineLength(doc, line); + if (len > d.maxLineLength) { + d.maxLineLength = len; + d.maxLine = line; + } + }); + } + + // Make sure the gutters options contains the element + // "CodeMirror-linenumbers" when the lineNumbers option is true. + function setGuttersForLineNumbers(options) { + var found = indexOf(options.gutters, "CodeMirror-linenumbers"); + if (found == -1 && options.lineNumbers) { + options.gutters = options.gutters.concat(["CodeMirror-linenumbers"]); + } else if (found > -1 && !options.lineNumbers) { + options.gutters = options.gutters.slice(0); + options.gutters.splice(found, 1); + } + } + + // SCROLLBARS + + // Re-synchronize the fake scrollbars with the actual size of the + // content. Optionally force a scrollTop. + function updateScrollbars(cm) { + var d = cm.display, docHeight = cm.doc.height; + var totalHeight = docHeight + paddingVert(d); + d.sizer.style.minHeight = d.heightForcer.style.top = totalHeight + "px"; + d.gutters.style.height = Math.max(totalHeight, d.scroller.clientHeight - scrollerCutOff) + "px"; + var scrollHeight = Math.max(totalHeight, d.scroller.scrollHeight); + var needsH = d.scroller.scrollWidth > (d.scroller.clientWidth + 1); + var needsV = scrollHeight > (d.scroller.clientHeight + 1); + if (needsV) { + d.scrollbarV.style.display = "block"; + d.scrollbarV.style.bottom = needsH ? scrollbarWidth(d.measure) + "px" : "0"; + d.scrollbarV.firstChild.style.height = + (scrollHeight - d.scroller.clientHeight + d.scrollbarV.clientHeight) + "px"; + } else { + d.scrollbarV.style.display = ""; + d.scrollbarV.firstChild.style.height = "0"; + } + if (needsH) { + d.scrollbarH.style.display = "block"; + d.scrollbarH.style.right = needsV ? scrollbarWidth(d.measure) + "px" : "0"; + d.scrollbarH.firstChild.style.width = + (d.scroller.scrollWidth - d.scroller.clientWidth + d.scrollbarH.clientWidth) + "px"; + } else { + d.scrollbarH.style.display = ""; + d.scrollbarH.firstChild.style.width = "0"; + } + if (needsH && needsV) { + d.scrollbarFiller.style.display = "block"; + d.scrollbarFiller.style.height = d.scrollbarFiller.style.width = scrollbarWidth(d.measure) + "px"; + } else d.scrollbarFiller.style.display = ""; + if (needsH && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutter) { + d.gutterFiller.style.display = "block"; + d.gutterFiller.style.height = scrollbarWidth(d.measure) + "px"; + d.gutterFiller.style.width = d.gutters.offsetWidth + "px"; + } else d.gutterFiller.style.display = ""; + + if (mac_geLion && scrollbarWidth(d.measure) === 0) { + d.scrollbarV.style.minWidth = d.scrollbarH.style.minHeight = mac_geMountainLion ? "18px" : "12px"; + d.scrollbarV.style.pointerEvents = d.scrollbarH.style.pointerEvents = "none"; + } + } + + function visibleLines(display, doc, viewPort) { + var top = display.scroller.scrollTop, height = display.wrapper.clientHeight; + if (typeof viewPort == "number") top = viewPort; + else if (viewPort) {top = viewPort.top; height = viewPort.bottom - viewPort.top;} + top = Math.floor(top - paddingTop(display)); + var bottom = Math.ceil(top + height); + return {from: lineAtHeight(doc, top), to: lineAtHeight(doc, bottom)}; + } + + // LINE NUMBERS + + function alignHorizontally(cm) { + var display = cm.display; + if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fixedGutter)) return; + var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.doc.scrollLeft; + var gutterW = display.gutters.offsetWidth, l = comp + "px"; + for (var n = display.lineDiv.firstChild; n; n = n.nextSibling) if (n.alignable) { + for (var i = 0, a = n.alignable; i < a.length; ++i) a[i].style.left = l; + } + if (cm.options.fixedGutter) + display.gutters.style.left = (comp + gutterW) + "px"; + } + + function maybeUpdateLineNumberWidth(cm) { + if (!cm.options.lineNumbers) return false; + var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display; + if (last.length != display.lineNumChars) { + var test = display.measure.appendChild(elt("div", [elt("div", last)], + "CodeMirror-linenumber CodeMirror-gutter-elt")); + var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW; + display.lineGutter.style.width = ""; + display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding); + display.lineNumWidth = display.lineNumInnerWidth + padding; + display.lineNumChars = display.lineNumInnerWidth ? last.length : -1; + display.lineGutter.style.width = display.lineNumWidth + "px"; + return true; + } + return false; + } + + function lineNumberFor(options, i) { + return String(options.lineNumberFormatter(i + options.firstLineNumber)); + } + function compensateForHScroll(display) { + return getRect(display.scroller).left - getRect(display.sizer).left; + } + + // DISPLAY DRAWING + + function updateDisplay(cm, changes, viewPort, forced) { + var oldFrom = cm.display.showingFrom, oldTo = cm.display.showingTo, updated; + var visible = visibleLines(cm.display, cm.doc, viewPort); + for (var first = true;; first = false) { + var oldWidth = cm.display.scroller.clientWidth; + if (!updateDisplayInner(cm, changes, visible, forced)) break; + updated = true; + changes = []; + updateSelection(cm); + updateScrollbars(cm); + if (first && cm.options.lineWrapping && oldWidth != cm.display.scroller.clientWidth) { + forced = true; + continue; + } + forced = false; + + // Clip forced viewport to actual scrollable area + if (viewPort) + viewPort = Math.min(cm.display.scroller.scrollHeight - cm.display.scroller.clientHeight, + typeof viewPort == "number" ? viewPort : viewPort.top); + visible = visibleLines(cm.display, cm.doc, viewPort); + if (visible.from >= cm.display.showingFrom && visible.to <= cm.display.showingTo) + break; + } + + if (updated) { + signalLater(cm, "update", cm); + if (cm.display.showingFrom != oldFrom || cm.display.showingTo != oldTo) + signalLater(cm, "viewportChange", cm, cm.display.showingFrom, cm.display.showingTo); + } + return updated; + } + + // Uses a set of changes plus the current scroll position to + // determine which DOM updates have to be made, and makes the + // updates. + function updateDisplayInner(cm, changes, visible, forced) { + var display = cm.display, doc = cm.doc; + if (!display.wrapper.offsetWidth) { + display.showingFrom = display.showingTo = doc.first; + display.viewOffset = 0; + return; + } + + // Bail out if the visible area is already rendered and nothing changed. + if (!forced && changes.length == 0 && + visible.from > display.showingFrom && visible.to < display.showingTo) + return; + + if (maybeUpdateLineNumberWidth(cm)) + changes = [{from: doc.first, to: doc.first + doc.size}]; + var gutterW = display.sizer.style.marginLeft = display.gutters.offsetWidth + "px"; + display.scrollbarH.style.left = cm.options.fixedGutter ? gutterW : "0"; + + // Used to determine which lines need their line numbers updated + var positionsChangedFrom = Infinity; + if (cm.options.lineNumbers) + for (var i = 0; i < changes.length; ++i) + if (changes[i].diff && changes[i].from < positionsChangedFrom) { positionsChangedFrom = changes[i].from; } + + var end = doc.first + doc.size; + var from = Math.max(visible.from - cm.options.viewportMargin, doc.first); + var to = Math.min(end, visible.to + cm.options.viewportMargin); + if (display.showingFrom < from && from - display.showingFrom < 20) from = Math.max(doc.first, display.showingFrom); + if (display.showingTo > to && display.showingTo - to < 20) to = Math.min(end, display.showingTo); + if (sawCollapsedSpans) { + from = lineNo(visualLine(doc, getLine(doc, from))); + while (to < end && lineIsHidden(doc, getLine(doc, to))) ++to; + } + + // Create a range of theoretically intact lines, and punch holes + // in that using the change info. + var intact = [{from: Math.max(display.showingFrom, doc.first), + to: Math.min(display.showingTo, end)}]; + if (intact[0].from >= intact[0].to) intact = []; + else intact = computeIntact(intact, changes); + // When merged lines are present, we might have to reduce the + // intact ranges because changes in continued fragments of the + // intact lines do require the lines to be redrawn. + if (sawCollapsedSpans) + for (var i = 0; i < intact.length; ++i) { + var range = intact[i], merged; + while (merged = collapsedSpanAtEnd(getLine(doc, range.to - 1))) { + var newTo = merged.find().from.line; + if (newTo > range.from) range.to = newTo; + else { intact.splice(i--, 1); break; } + } + } + + // Clip off the parts that won't be visible + var intactLines = 0; + for (var i = 0; i < intact.length; ++i) { + var range = intact[i]; + if (range.from < from) range.from = from; + if (range.to > to) range.to = to; + if (range.from >= range.to) intact.splice(i--, 1); + else intactLines += range.to - range.from; + } + if (!forced && intactLines == to - from && from == display.showingFrom && to == display.showingTo) { + updateViewOffset(cm); + return; + } + intact.sort(function(a, b) {return a.from - b.from;}); + + // Avoid crashing on IE's "unspecified error" when in iframes + try { + var focused = document.activeElement; + } catch(e) {} + if (intactLines < (to - from) * .7) display.lineDiv.style.display = "none"; + patchDisplay(cm, from, to, intact, positionsChangedFrom); + display.lineDiv.style.display = ""; + if (focused && document.activeElement != focused && focused.offsetHeight) focused.focus(); + + var different = from != display.showingFrom || to != display.showingTo || + display.lastSizeC != display.wrapper.clientHeight; + // This is just a bogus formula that detects when the editor is + // resized or the font size changes. + if (different) { + display.lastSizeC = display.wrapper.clientHeight; + startWorker(cm, 400); + } + display.showingFrom = from; display.showingTo = to; + + display.gutters.style.height = ""; + updateHeightsInViewport(cm); + updateViewOffset(cm); + + return true; + } + + function updateHeightsInViewport(cm) { + var display = cm.display; + var prevBottom = display.lineDiv.offsetTop; + for (var node = display.lineDiv.firstChild, height; node; node = node.nextSibling) if (node.lineObj) { + if (ie_lt8) { + var bot = node.offsetTop + node.offsetHeight; + height = bot - prevBottom; + prevBottom = bot; + } else { + var box = getRect(node); + height = box.bottom - box.top; + } + var diff = node.lineObj.height - height; + if (height < 2) height = textHeight(display); + if (diff > .001 || diff < -.001) { + updateLineHeight(node.lineObj, height); + var widgets = node.lineObj.widgets; + if (widgets) for (var i = 0; i < widgets.length; ++i) + widgets[i].height = widgets[i].node.offsetHeight; + } + } + } + + function updateViewOffset(cm) { + var off = cm.display.viewOffset = heightAtLine(cm, getLine(cm.doc, cm.display.showingFrom)); + // Position the mover div to align with the current virtual scroll position + cm.display.mover.style.top = off + "px"; + } + + function computeIntact(intact, changes) { + for (var i = 0, l = changes.length || 0; i < l; ++i) { + var change = changes[i], intact2 = [], diff = change.diff || 0; + for (var j = 0, l2 = intact.length; j < l2; ++j) { + var range = intact[j]; + if (change.to <= range.from && change.diff) { + intact2.push({from: range.from + diff, to: range.to + diff}); + } else if (change.to <= range.from || change.from >= range.to) { + intact2.push(range); + } else { + if (change.from > range.from) + intact2.push({from: range.from, to: change.from}); + if (change.to < range.to) + intact2.push({from: change.to + diff, to: range.to + diff}); + } + } + intact = intact2; + } + return intact; + } + + function getDimensions(cm) { + var d = cm.display, left = {}, width = {}; + for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) { + left[cm.options.gutters[i]] = n.offsetLeft; + width[cm.options.gutters[i]] = n.offsetWidth; + } + return {fixedPos: compensateForHScroll(d), + gutterTotalWidth: d.gutters.offsetWidth, + gutterLeft: left, + gutterWidth: width, + wrapperWidth: d.wrapper.clientWidth}; + } + + function patchDisplay(cm, from, to, intact, updateNumbersFrom) { + var dims = getDimensions(cm); + var display = cm.display, lineNumbers = cm.options.lineNumbers; + if (!intact.length && (!webkit || !cm.display.currentWheelTarget)) + removeChildren(display.lineDiv); + var container = display.lineDiv, cur = container.firstChild; + + function rm(node) { + var next = node.nextSibling; + if (webkit && mac && cm.display.currentWheelTarget == node) { + node.style.display = "none"; + node.lineObj = null; + } else { + node.parentNode.removeChild(node); + } + return next; + } + + var nextIntact = intact.shift(), lineN = from; + cm.doc.iter(from, to, function(line) { + if (nextIntact && nextIntact.to == lineN) nextIntact = intact.shift(); + if (lineIsHidden(cm.doc, line)) { + if (line.height != 0) updateLineHeight(line, 0); + if (line.widgets && cur && cur.previousSibling) for (var i = 0; i < line.widgets.length; ++i) { + var w = line.widgets[i]; + if (w.showIfHidden) { + var prev = cur.previousSibling; + if (/pre/i.test(prev.nodeName)) { + var wrap = elt("div", null, null, "position: relative"); + prev.parentNode.replaceChild(wrap, prev); + wrap.appendChild(prev); + prev = wrap; + } + var wnode = prev.appendChild(elt("div", [w.node], "CodeMirror-linewidget")); + if (!w.handleMouseEvents) wnode.ignoreEvents = true; + positionLineWidget(w, wnode, prev, dims); + } + } + } else if (nextIntact && nextIntact.from <= lineN && nextIntact.to > lineN) { + // This line is intact. Skip to the actual node. Update its + // line number if needed. + while (cur.lineObj != line) cur = rm(cur); + if (lineNumbers && updateNumbersFrom <= lineN && cur.lineNumber) + setTextContent(cur.lineNumber, lineNumberFor(cm.options, lineN)); + cur = cur.nextSibling; + } else { + // For lines with widgets, make an attempt to find and reuse + // the existing element, so that widgets aren't needlessly + // removed and re-inserted into the dom + if (line.widgets) for (var j = 0, search = cur, reuse; search && j < 20; ++j, search = search.nextSibling) + if (search.lineObj == line && /div/i.test(search.nodeName)) { reuse = search; break; } + // This line needs to be generated. + var lineNode = buildLineElement(cm, line, lineN, dims, reuse); + if (lineNode != reuse) { + container.insertBefore(lineNode, cur); + } else { + while (cur != reuse) cur = rm(cur); + cur = cur.nextSibling; + } + + lineNode.lineObj = line; + } + ++lineN; + }); + while (cur) cur = rm(cur); + } + + function buildLineElement(cm, line, lineNo, dims, reuse) { + var built = buildLineContent(cm, line), lineElement = built.pre; + var markers = line.gutterMarkers, display = cm.display, wrap; + + var bgClass = built.bgClass ? built.bgClass + " " + (line.bgClass || "") : line.bgClass; + if (!cm.options.lineNumbers && !markers && !bgClass && !line.wrapClass && !line.widgets) + return lineElement; + + // Lines with gutter elements, widgets or a background class need + // to be wrapped again, and have the extra elements added to the + // wrapper div + + if (reuse) { + reuse.alignable = null; + var isOk = true, widgetsSeen = 0, insertBefore = null; + for (var n = reuse.firstChild, next; n; n = next) { + next = n.nextSibling; + if (!/\bCodeMirror-linewidget\b/.test(n.className)) { + reuse.removeChild(n); + } else { + for (var i = 0; i < line.widgets.length; ++i) { + var widget = line.widgets[i]; + if (widget.node == n.firstChild) { + if (!widget.above && !insertBefore) insertBefore = n; + positionLineWidget(widget, n, reuse, dims); + ++widgetsSeen; + break; + } + } + if (i == line.widgets.length) { isOk = false; break; } + } + } + reuse.insertBefore(lineElement, insertBefore); + if (isOk && widgetsSeen == line.widgets.length) { + wrap = reuse; + reuse.className = line.wrapClass || ""; + } + } + if (!wrap) { + wrap = elt("div", null, line.wrapClass, "position: relative"); + wrap.appendChild(lineElement); + } + // Kludge to make sure the styled element lies behind the selection (by z-index) + if (bgClass) + wrap.insertBefore(elt("div", null, bgClass + " CodeMirror-linebackground"), wrap.firstChild); + if (cm.options.lineNumbers || markers) { + var gutterWrap = wrap.insertBefore(elt("div", null, "CodeMirror-gutter-wrapper", "position: absolute; left: " + + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px"), + lineElement); + if (cm.options.fixedGutter) (wrap.alignable || (wrap.alignable = [])).push(gutterWrap); + if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"])) + wrap.lineNumber = gutterWrap.appendChild( + elt("div", lineNumberFor(cm.options, lineNo), + "CodeMirror-linenumber CodeMirror-gutter-elt", + "left: " + dims.gutterLeft["CodeMirror-linenumbers"] + "px; width: " + + display.lineNumInnerWidth + "px")); + if (markers) + for (var k = 0; k < cm.options.gutters.length; ++k) { + var id = cm.options.gutters[k], found = markers.hasOwnProperty(id) && markers[id]; + if (found) + gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt", "left: " + + dims.gutterLeft[id] + "px; width: " + dims.gutterWidth[id] + "px")); + } + } + if (ie_lt8) wrap.style.zIndex = 2; + if (line.widgets && wrap != reuse) for (var i = 0, ws = line.widgets; i < ws.length; ++i) { + var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget"); + if (!widget.handleMouseEvents) node.ignoreEvents = true; + positionLineWidget(widget, node, wrap, dims); + if (widget.above) + wrap.insertBefore(node, cm.options.lineNumbers && line.height != 0 ? gutterWrap : lineElement); + else + wrap.appendChild(node); + signalLater(widget, "redraw"); + } + return wrap; + } + + function positionLineWidget(widget, node, wrap, dims) { + if (widget.noHScroll) { + (wrap.alignable || (wrap.alignable = [])).push(node); + var width = dims.wrapperWidth; + node.style.left = dims.fixedPos + "px"; + if (!widget.coverGutter) { + width -= dims.gutterTotalWidth; + node.style.paddingLeft = dims.gutterTotalWidth + "px"; + } + node.style.width = width + "px"; + } + if (widget.coverGutter) { + node.style.zIndex = 5; + node.style.position = "relative"; + if (!widget.noHScroll) node.style.marginLeft = -dims.gutterTotalWidth + "px"; + } + } + + // SELECTION / CURSOR + + function updateSelection(cm) { + var display = cm.display; + var collapsed = posEq(cm.doc.sel.from, cm.doc.sel.to); + if (collapsed || cm.options.showCursorWhenSelecting) + updateSelectionCursor(cm); + else + display.cursor.style.display = display.otherCursor.style.display = "none"; + if (!collapsed) + updateSelectionRange(cm); + else + display.selectionDiv.style.display = "none"; + + // Move the hidden textarea near the cursor to prevent scrolling artifacts + if (cm.options.moveInputWithCursor) { + var headPos = cursorCoords(cm, cm.doc.sel.head, "div"); + var wrapOff = getRect(display.wrapper), lineOff = getRect(display.lineDiv); + display.inputDiv.style.top = Math.max(0, Math.min(display.wrapper.clientHeight - 10, + headPos.top + lineOff.top - wrapOff.top)) + "px"; + display.inputDiv.style.left = Math.max(0, Math.min(display.wrapper.clientWidth - 10, + headPos.left + lineOff.left - wrapOff.left)) + "px"; + } + } + + // No selection, plain cursor + function updateSelectionCursor(cm) { + var display = cm.display, pos = cursorCoords(cm, cm.doc.sel.head, "div"); + display.cursor.style.left = pos.left + "px"; + display.cursor.style.top = pos.top + "px"; + display.cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px"; + display.cursor.style.display = ""; + + if (pos.other) { + display.otherCursor.style.display = ""; + display.otherCursor.style.left = pos.other.left + "px"; + display.otherCursor.style.top = pos.other.top + "px"; + display.otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px"; + } else { display.otherCursor.style.display = "none"; } + } + + // Highlight selection + function updateSelectionRange(cm) { + var display = cm.display, doc = cm.doc, sel = cm.doc.sel; + var fragment = document.createDocumentFragment(); + var clientWidth = display.lineSpace.offsetWidth, pl = paddingLeft(cm.display); + + function add(left, top, width, bottom) { + if (top < 0) top = 0; + fragment.appendChild(elt("div", null, "CodeMirror-selected", "position: absolute; left: " + left + + "px; top: " + top + "px; width: " + (width == null ? clientWidth - left : width) + + "px; height: " + (bottom - top) + "px")); + } + + function drawForLine(line, fromArg, toArg) { + var lineObj = getLine(doc, line); + var lineLen = lineObj.text.length; + var start, end; + function coords(ch, bias) { + return charCoords(cm, Pos(line, ch), "div", lineObj, bias); + } + + iterateBidiSections(getOrder(lineObj), fromArg || 0, toArg == null ? lineLen : toArg, function(from, to, dir) { + var leftPos = coords(from, "left"), rightPos, left, right; + if (from == to) { + rightPos = leftPos; + left = right = leftPos.left; + } else { + rightPos = coords(to - 1, "right"); + if (dir == "rtl") { var tmp = leftPos; leftPos = rightPos; rightPos = tmp; } + left = leftPos.left; + right = rightPos.right; + } + if (fromArg == null && from == 0) left = pl; + if (rightPos.top - leftPos.top > 3) { // Different lines, draw top part + add(left, leftPos.top, null, leftPos.bottom); + left = pl; + if (leftPos.bottom < rightPos.top) add(left, leftPos.bottom, null, rightPos.top); + } + if (toArg == null && to == lineLen) right = clientWidth; + if (!start || leftPos.top < start.top || leftPos.top == start.top && leftPos.left < start.left) + start = leftPos; + if (!end || rightPos.bottom > end.bottom || rightPos.bottom == end.bottom && rightPos.right > end.right) + end = rightPos; + if (left < pl + 1) left = pl; + add(left, rightPos.top, right - left, rightPos.bottom); + }); + return {start: start, end: end}; + } + + if (sel.from.line == sel.to.line) { + drawForLine(sel.from.line, sel.from.ch, sel.to.ch); + } else { + var fromLine = getLine(doc, sel.from.line), toLine = getLine(doc, sel.to.line); + var singleVLine = visualLine(doc, fromLine) == visualLine(doc, toLine); + var leftEnd = drawForLine(sel.from.line, sel.from.ch, singleVLine ? fromLine.text.length : null).end; + var rightStart = drawForLine(sel.to.line, singleVLine ? 0 : null, sel.to.ch).start; + if (singleVLine) { + if (leftEnd.top < rightStart.top - 2) { + add(leftEnd.right, leftEnd.top, null, leftEnd.bottom); + add(pl, rightStart.top, rightStart.left, rightStart.bottom); + } else { + add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftEnd.bottom); + } + } + if (leftEnd.bottom < rightStart.top) + add(pl, leftEnd.bottom, null, rightStart.top); + } + + removeChildrenAndAdd(display.selectionDiv, fragment); + display.selectionDiv.style.display = ""; + } + + // Cursor-blinking + function restartBlink(cm) { + if (!cm.state.focused) return; + var display = cm.display; + clearInterval(display.blinker); + var on = true; + display.cursor.style.visibility = display.otherCursor.style.visibility = ""; + if (cm.options.cursorBlinkRate > 0) + display.blinker = setInterval(function() { + display.cursor.style.visibility = display.otherCursor.style.visibility = (on = !on) ? "" : "hidden"; + }, cm.options.cursorBlinkRate); + } + + // HIGHLIGHT WORKER + + function startWorker(cm, time) { + if (cm.doc.mode.startState && cm.doc.frontier < cm.display.showingTo) + cm.state.highlight.set(time, bind(highlightWorker, cm)); + } + + function highlightWorker(cm) { + var doc = cm.doc; + if (doc.frontier < doc.first) doc.frontier = doc.first; + if (doc.frontier >= cm.display.showingTo) return; + var end = +new Date + cm.options.workTime; + var state = copyState(doc.mode, getStateBefore(cm, doc.frontier)); + var changed = [], prevChange; + doc.iter(doc.frontier, Math.min(doc.first + doc.size, cm.display.showingTo + 500), function(line) { + if (doc.frontier >= cm.display.showingFrom) { // Visible + var oldStyles = line.styles; + line.styles = highlightLine(cm, line, state, true); + var ischange = !oldStyles || oldStyles.length != line.styles.length; + for (var i = 0; !ischange && i < oldStyles.length; ++i) ischange = oldStyles[i] != line.styles[i]; + if (ischange) { + if (prevChange && prevChange.end == doc.frontier) prevChange.end++; + else changed.push(prevChange = {start: doc.frontier, end: doc.frontier + 1}); + } + line.stateAfter = copyState(doc.mode, state); + } else { + processLine(cm, line.text, state); + line.stateAfter = doc.frontier % 5 == 0 ? copyState(doc.mode, state) : null; + } + ++doc.frontier; + if (+new Date > end) { + startWorker(cm, cm.options.workDelay); + return true; + } + }); + if (changed.length) + operation(cm, function() { + for (var i = 0; i < changed.length; ++i) + regChange(this, changed[i].start, changed[i].end); + })(); + } + + // Finds the line to start with when starting a parse. Tries to + // find a line with a stateAfter, so that it can start with a + // valid state. If that fails, it returns the line with the + // smallest indentation, which tends to need the least context to + // parse correctly. + function findStartLine(cm, n, precise) { + var minindent, minline, doc = cm.doc; + var lim = precise ? -1 : n - (cm.doc.mode.innerMode ? 1000 : 100); + for (var search = n; search > lim; --search) { + if (search <= doc.first) return doc.first; + var line = getLine(doc, search - 1); + if (line.stateAfter && (!precise || search <= doc.frontier)) return search; + var indented = countColumn(line.text, null, cm.options.tabSize); + if (minline == null || minindent > indented) { + minline = search - 1; + minindent = indented; + } + } + return minline; + } + + function getStateBefore(cm, n, precise) { + var doc = cm.doc, display = cm.display; + if (!doc.mode.startState) return true; + var pos = findStartLine(cm, n, precise), state = pos > doc.first && getLine(doc, pos-1).stateAfter; + if (!state) state = startState(doc.mode); + else state = copyState(doc.mode, state); + doc.iter(pos, n, function(line) { + processLine(cm, line.text, state); + var save = pos == n - 1 || pos % 5 == 0 || pos >= display.showingFrom && pos < display.showingTo; + line.stateAfter = save ? copyState(doc.mode, state) : null; + ++pos; + }); + if (precise) doc.frontier = pos; + return state; + } + + // POSITION MEASUREMENT + + function paddingTop(display) {return display.lineSpace.offsetTop;} + function paddingVert(display) {return display.mover.offsetHeight - display.lineSpace.offsetHeight;} + function paddingLeft(display) { + var e = removeChildrenAndAdd(display.measure, elt("pre", null, null, "text-align: left")).appendChild(elt("span", "x")); + return e.offsetLeft; + } + + function measureChar(cm, line, ch, data, bias) { + var dir = -1; + data = data || measureLine(cm, line); + if (data.crude) { + var left = data.left + ch * data.width; + return {left: left, right: left + data.width, top: data.top, bottom: data.bottom}; + } + + for (var pos = ch;; pos += dir) { + var r = data[pos]; + if (r) break; + if (dir < 0 && pos == 0) dir = 1; + } + bias = pos > ch ? "left" : pos < ch ? "right" : bias; + if (bias == "left" && r.leftSide) r = r.leftSide; + else if (bias == "right" && r.rightSide) r = r.rightSide; + return {left: pos < ch ? r.right : r.left, + right: pos > ch ? r.left : r.right, + top: r.top, + bottom: r.bottom}; + } + + function findCachedMeasurement(cm, line) { + var cache = cm.display.measureLineCache; + for (var i = 0; i < cache.length; ++i) { + var memo = cache[i]; + if (memo.text == line.text && memo.markedSpans == line.markedSpans && + cm.display.scroller.clientWidth == memo.width && + memo.classes == line.textClass + "|" + line.wrapClass) + return memo; + } + } + + function clearCachedMeasurement(cm, line) { + var exists = findCachedMeasurement(cm, line); + if (exists) exists.text = exists.measure = exists.markedSpans = null; + } + + function measureLine(cm, line) { + // First look in the cache + var cached = findCachedMeasurement(cm, line); + if (cached) return cached.measure; + + // Failing that, recompute and store result in cache + var measure = measureLineInner(cm, line); + var cache = cm.display.measureLineCache; + var memo = {text: line.text, width: cm.display.scroller.clientWidth, + markedSpans: line.markedSpans, measure: measure, + classes: line.textClass + "|" + line.wrapClass}; + if (cache.length == 16) cache[++cm.display.measureLineCachePos % 16] = memo; + else cache.push(memo); + return measure; + } + + function measureLineInner(cm, line) { + if (!cm.options.lineWrapping && line.text.length >= cm.options.crudeMeasuringFrom) + return crudelyMeasureLine(cm, line); + + var display = cm.display, measure = emptyArray(line.text.length); + var pre = buildLineContent(cm, line, measure, true).pre; + + // IE does not cache element positions of inline elements between + // calls to getBoundingClientRect. This makes the loop below, + // which gathers the positions of all the characters on the line, + // do an amount of layout work quadratic to the number of + // characters. When line wrapping is off, we try to improve things + // by first subdividing the line into a bunch of inline blocks, so + // that IE can reuse most of the layout information from caches + // for those blocks. This does interfere with line wrapping, so it + // doesn't work when wrapping is on, but in that case the + // situation is slightly better, since IE does cache line-wrapping + // information and only recomputes per-line. + if (old_ie && !ie_lt8 && !cm.options.lineWrapping && pre.childNodes.length > 100) { + var fragment = document.createDocumentFragment(); + var chunk = 10, n = pre.childNodes.length; + for (var i = 0, chunks = Math.ceil(n / chunk); i < chunks; ++i) { + var wrap = elt("div", null, null, "display: inline-block"); + for (var j = 0; j < chunk && n; ++j) { + wrap.appendChild(pre.firstChild); + --n; + } + fragment.appendChild(wrap); + } + pre.appendChild(fragment); + } + + removeChildrenAndAdd(display.measure, pre); + + var outer = getRect(display.lineDiv); + var vranges = [], data = emptyArray(line.text.length), maxBot = pre.offsetHeight; + // Work around an IE7/8 bug where it will sometimes have randomly + // replaced our pre with a clone at this point. + if (ie_lt9 && display.measure.first != pre) + removeChildrenAndAdd(display.measure, pre); + + function measureRect(rect) { + var top = rect.top - outer.top, bot = rect.bottom - outer.top; + if (bot > maxBot) bot = maxBot; + if (top < 0) top = 0; + for (var i = vranges.length - 2; i >= 0; i -= 2) { + var rtop = vranges[i], rbot = vranges[i+1]; + if (rtop > bot || rbot < top) continue; + if (rtop <= top && rbot >= bot || + top <= rtop && bot >= rbot || + Math.min(bot, rbot) - Math.max(top, rtop) >= (bot - top) >> 1) { + vranges[i] = Math.min(top, rtop); + vranges[i+1] = Math.max(bot, rbot); + break; + } + } + if (i < 0) { i = vranges.length; vranges.push(top, bot); } + return {left: rect.left - outer.left, + right: rect.right - outer.left, + top: i, bottom: null}; + } + function finishRect(rect) { + rect.bottom = vranges[rect.top+1]; + rect.top = vranges[rect.top]; + } + + for (var i = 0, cur; i < measure.length; ++i) if (cur = measure[i]) { + var node = cur, rect = null; + // A widget might wrap, needs special care + if (/\bCodeMirror-widget\b/.test(cur.className) && cur.getClientRects) { + if (cur.firstChild.nodeType == 1) node = cur.firstChild; + var rects = node.getClientRects(); + if (rects.length > 1) { + rect = data[i] = measureRect(rects[0]); + rect.rightSide = measureRect(rects[rects.length - 1]); + } + } + if (!rect) rect = data[i] = measureRect(getRect(node)); + if (cur.measureRight) rect.right = getRect(cur.measureRight).left - outer.left; + if (cur.leftSide) rect.leftSide = measureRect(getRect(cur.leftSide)); + } + removeChildren(cm.display.measure); + for (var i = 0, cur; i < data.length; ++i) if (cur = data[i]) { + finishRect(cur); + if (cur.leftSide) finishRect(cur.leftSide); + if (cur.rightSide) finishRect(cur.rightSide); + } + return data; + } + + function crudelyMeasureLine(cm, line) { + var copy = new Line(line.text.slice(0, 100), null); + if (line.textClass) copy.textClass = line.textClass; + var measure = measureLineInner(cm, copy); + var left = measureChar(cm, copy, 0, measure, "left"); + var right = measureChar(cm, copy, 99, measure, "right"); + return {crude: true, top: left.top, left: left.left, bottom: left.bottom, width: (right.right - left.left) / 100}; + } + + function measureLineWidth(cm, line) { + var hasBadSpan = false; + if (line.markedSpans) for (var i = 0; i < line.markedSpans; ++i) { + var sp = line.markedSpans[i]; + if (sp.collapsed && (sp.to == null || sp.to == line.text.length)) hasBadSpan = true; + } + var cached = !hasBadSpan && findCachedMeasurement(cm, line); + if (cached || line.text.length >= cm.options.crudeMeasuringFrom) + return measureChar(cm, line, line.text.length, cached && cached.measure, "right").right; + + var pre = buildLineContent(cm, line, null, true).pre; + var end = pre.appendChild(zeroWidthElement(cm.display.measure)); + removeChildrenAndAdd(cm.display.measure, pre); + return getRect(end).right - getRect(cm.display.lineDiv).left; + } + + function clearCaches(cm) { + cm.display.measureLineCache.length = cm.display.measureLineCachePos = 0; + cm.display.cachedCharWidth = cm.display.cachedTextHeight = null; + if (!cm.options.lineWrapping) cm.display.maxLineChanged = true; + cm.display.lineNumChars = null; + } + + function pageScrollX() { return window.pageXOffset || (document.documentElement || document.body).scrollLeft; } + function pageScrollY() { return window.pageYOffset || (document.documentElement || document.body).scrollTop; } + + // Context is one of "line", "div" (display.lineDiv), "local"/null (editor), or "page" + function intoCoordSystem(cm, lineObj, rect, context) { + if (lineObj.widgets) for (var i = 0; i < lineObj.widgets.length; ++i) if (lineObj.widgets[i].above) { + var size = widgetHeight(lineObj.widgets[i]); + rect.top += size; rect.bottom += size; + } + if (context == "line") return rect; + if (!context) context = "local"; + var yOff = heightAtLine(cm, lineObj); + if (context == "local") yOff += paddingTop(cm.display); + else yOff -= cm.display.viewOffset; + if (context == "page" || context == "window") { + var lOff = getRect(cm.display.lineSpace); + yOff += lOff.top + (context == "window" ? 0 : pageScrollY()); + var xOff = lOff.left + (context == "window" ? 0 : pageScrollX()); + rect.left += xOff; rect.right += xOff; + } + rect.top += yOff; rect.bottom += yOff; + return rect; + } + + // Context may be "window", "page", "div", or "local"/null + // Result is in "div" coords + function fromCoordSystem(cm, coords, context) { + if (context == "div") return coords; + var left = coords.left, top = coords.top; + // First move into "page" coordinate system + if (context == "page") { + left -= pageScrollX(); + top -= pageScrollY(); + } else if (context == "local" || !context) { + var localBox = getRect(cm.display.sizer); + left += localBox.left; + top += localBox.top; + } + + var lineSpaceBox = getRect(cm.display.lineSpace); + return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top}; + } + + function charCoords(cm, pos, context, lineObj, bias) { + if (!lineObj) lineObj = getLine(cm.doc, pos.line); + return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch, null, bias), context); + } + + function cursorCoords(cm, pos, context, lineObj, measurement) { + lineObj = lineObj || getLine(cm.doc, pos.line); + if (!measurement) measurement = measureLine(cm, lineObj); + function get(ch, right) { + var m = measureChar(cm, lineObj, ch, measurement, right ? "right" : "left"); + if (right) m.left = m.right; else m.right = m.left; + return intoCoordSystem(cm, lineObj, m, context); + } + function getBidi(ch, partPos) { + var part = order[partPos], right = part.level % 2; + if (ch == bidiLeft(part) && partPos && part.level < order[partPos - 1].level) { + part = order[--partPos]; + ch = bidiRight(part) - (part.level % 2 ? 0 : 1); + right = true; + } else if (ch == bidiRight(part) && partPos < order.length - 1 && part.level < order[partPos + 1].level) { + part = order[++partPos]; + ch = bidiLeft(part) - part.level % 2; + right = false; + } + if (right && ch == part.to && ch > part.from) return get(ch - 1); + return get(ch, right); + } + var order = getOrder(lineObj), ch = pos.ch; + if (!order) return get(ch); + var partPos = getBidiPartAt(order, ch); + var val = getBidi(ch, partPos); + if (bidiOther != null) val.other = getBidi(ch, bidiOther); + return val; + } + + function PosWithInfo(line, ch, outside, xRel) { + var pos = new Pos(line, ch); + pos.xRel = xRel; + if (outside) pos.outside = true; + return pos; + } + + // Coords must be lineSpace-local + function coordsChar(cm, x, y) { + var doc = cm.doc; + y += cm.display.viewOffset; + if (y < 0) return PosWithInfo(doc.first, 0, true, -1); + var lineNo = lineAtHeight(doc, y), last = doc.first + doc.size - 1; + if (lineNo > last) + return PosWithInfo(doc.first + doc.size - 1, getLine(doc, last).text.length, true, 1); + if (x < 0) x = 0; + + for (;;) { + var lineObj = getLine(doc, lineNo); + var found = coordsCharInner(cm, lineObj, lineNo, x, y); + var merged = collapsedSpanAtEnd(lineObj); + var mergedPos = merged && merged.find(); + if (merged && (found.ch > mergedPos.from.ch || found.ch == mergedPos.from.ch && found.xRel > 0)) + lineNo = mergedPos.to.line; + else + return found; + } + } + + function coordsCharInner(cm, lineObj, lineNo, x, y) { + var innerOff = y - heightAtLine(cm, lineObj); + var wrongLine = false, adjust = 2 * cm.display.wrapper.clientWidth; + var measurement = measureLine(cm, lineObj); + + function getX(ch) { + var sp = cursorCoords(cm, Pos(lineNo, ch), "line", + lineObj, measurement); + wrongLine = true; + if (innerOff > sp.bottom) return sp.left - adjust; + else if (innerOff < sp.top) return sp.left + adjust; + else wrongLine = false; + return sp.left; + } + + var bidi = getOrder(lineObj), dist = lineObj.text.length; + var from = lineLeft(lineObj), to = lineRight(lineObj); + var fromX = getX(from), fromOutside = wrongLine, toX = getX(to), toOutside = wrongLine; + + if (x > toX) return PosWithInfo(lineNo, to, toOutside, 1); + // Do a binary search between these bounds. + for (;;) { + if (bidi ? to == from || to == moveVisually(lineObj, from, 1) : to - from <= 1) { + var ch = x < fromX || x - fromX <= toX - x ? from : to; + var xDiff = x - (ch == from ? fromX : toX); + while (isExtendingChar(lineObj.text.charAt(ch))) ++ch; + var pos = PosWithInfo(lineNo, ch, ch == from ? fromOutside : toOutside, + xDiff < 0 ? -1 : xDiff ? 1 : 0); + return pos; + } + var step = Math.ceil(dist / 2), middle = from + step; + if (bidi) { + middle = from; + for (var i = 0; i < step; ++i) middle = moveVisually(lineObj, middle, 1); + } + var middleX = getX(middle); + if (middleX > x) {to = middle; toX = middleX; if (toOutside = wrongLine) toX += 1000; dist = step;} + else {from = middle; fromX = middleX; fromOutside = wrongLine; dist -= step;} + } + } + + var measureText; + function textHeight(display) { + if (display.cachedTextHeight != null) return display.cachedTextHeight; + if (measureText == null) { + measureText = elt("pre"); + // Measure a bunch of lines, for browsers that compute + // fractional heights. + for (var i = 0; i < 49; ++i) { + measureText.appendChild(document.createTextNode("x")); + measureText.appendChild(elt("br")); + } + measureText.appendChild(document.createTextNode("x")); + } + removeChildrenAndAdd(display.measure, measureText); + var height = measureText.offsetHeight / 50; + if (height > 3) display.cachedTextHeight = height; + removeChildren(display.measure); + return height || 1; + } + + function charWidth(display) { + if (display.cachedCharWidth != null) return display.cachedCharWidth; + var anchor = elt("span", "x"); + var pre = elt("pre", [anchor]); + removeChildrenAndAdd(display.measure, pre); + var width = anchor.offsetWidth; + if (width > 2) display.cachedCharWidth = width; + return width || 10; + } + + // OPERATIONS + + // Operations are used to wrap changes in such a way that each + // change won't have to update the cursor and display (which would + // be awkward, slow, and error-prone), but instead updates are + // batched and then all combined and executed at once. + + var nextOpId = 0; + function startOperation(cm) { + cm.curOp = { + // An array of ranges of lines that have to be updated. See + // updateDisplay. + changes: [], + forceUpdate: false, + updateInput: null, + userSelChange: null, + textChanged: null, + selectionChanged: false, + cursorActivity: false, + updateMaxLine: false, + updateScrollPos: false, + id: ++nextOpId + }; + if (!delayedCallbackDepth++) delayedCallbacks = []; + } + + function endOperation(cm) { + var op = cm.curOp, doc = cm.doc, display = cm.display; + cm.curOp = null; + + if (op.updateMaxLine) computeMaxLength(cm); + if (display.maxLineChanged && !cm.options.lineWrapping && display.maxLine) { + var width = measureLineWidth(cm, display.maxLine); + display.sizer.style.minWidth = Math.max(0, width + 3 + scrollerCutOff) + "px"; + display.maxLineChanged = false; + var maxScrollLeft = Math.max(0, display.sizer.offsetLeft + display.sizer.offsetWidth - display.scroller.clientWidth); + if (maxScrollLeft < doc.scrollLeft && !op.updateScrollPos) + setScrollLeft(cm, Math.min(display.scroller.scrollLeft, maxScrollLeft), true); + } + var newScrollPos, updated; + if (op.updateScrollPos) { + newScrollPos = op.updateScrollPos; + } else if (op.selectionChanged && display.scroller.clientHeight) { // don't rescroll if not visible + var coords = cursorCoords(cm, doc.sel.head); + newScrollPos = calculateScrollPos(cm, coords.left, coords.top, coords.left, coords.bottom); + } + if (op.changes.length || op.forceUpdate || newScrollPos && newScrollPos.scrollTop != null) { + updated = updateDisplay(cm, op.changes, newScrollPos && newScrollPos.scrollTop, op.forceUpdate); + if (cm.display.scroller.offsetHeight) cm.doc.scrollTop = cm.display.scroller.scrollTop; + } + if (!updated && op.selectionChanged) updateSelection(cm); + if (op.updateScrollPos) { + var top = Math.max(0, Math.min(display.scroller.scrollHeight - display.scroller.clientHeight, newScrollPos.scrollTop)); + var left = Math.max(0, Math.min(display.scroller.scrollWidth - display.scroller.clientWidth, newScrollPos.scrollLeft)); + display.scroller.scrollTop = display.scrollbarV.scrollTop = doc.scrollTop = top; + display.scroller.scrollLeft = display.scrollbarH.scrollLeft = doc.scrollLeft = left; + alignHorizontally(cm); + if (op.scrollToPos) + scrollPosIntoView(cm, clipPos(cm.doc, op.scrollToPos.from), + clipPos(cm.doc, op.scrollToPos.to), op.scrollToPos.margin); + } else if (newScrollPos) { + scrollCursorIntoView(cm); + } + if (op.selectionChanged) restartBlink(cm); + + if (cm.state.focused && op.updateInput) + resetInput(cm, op.userSelChange); + + var hidden = op.maybeHiddenMarkers, unhidden = op.maybeUnhiddenMarkers; + if (hidden) for (var i = 0; i < hidden.length; ++i) + if (!hidden[i].lines.length) signal(hidden[i], "hide"); + if (unhidden) for (var i = 0; i < unhidden.length; ++i) + if (unhidden[i].lines.length) signal(unhidden[i], "unhide"); + + var delayed; + if (!--delayedCallbackDepth) { + delayed = delayedCallbacks; + delayedCallbacks = null; + } + if (op.textChanged) + signal(cm, "change", cm, op.textChanged); + if (op.cursorActivity) signal(cm, "cursorActivity", cm); + if (delayed) for (var i = 0; i < delayed.length; ++i) delayed[i](); + } + + // Wraps a function in an operation. Returns the wrapped function. + function operation(cm1, f) { + return function() { + var cm = cm1 || this, withOp = !cm.curOp; + if (withOp) startOperation(cm); + try { var result = f.apply(cm, arguments); } + finally { if (withOp) endOperation(cm); } + return result; + }; + } + function docOperation(f) { + return function() { + var withOp = this.cm && !this.cm.curOp, result; + if (withOp) startOperation(this.cm); + try { result = f.apply(this, arguments); } + finally { if (withOp) endOperation(this.cm); } + return result; + }; + } + function runInOp(cm, f) { + var withOp = !cm.curOp, result; + if (withOp) startOperation(cm); + try { result = f(); } + finally { if (withOp) endOperation(cm); } + return result; + } + + function regChange(cm, from, to, lendiff) { + if (from == null) from = cm.doc.first; + if (to == null) to = cm.doc.first + cm.doc.size; + cm.curOp.changes.push({from: from, to: to, diff: lendiff}); + } + + // INPUT HANDLING + + function slowPoll(cm) { + if (cm.display.pollingFast) return; + cm.display.poll.set(cm.options.pollInterval, function() { + readInput(cm); + if (cm.state.focused) slowPoll(cm); + }); + } + + function fastPoll(cm) { + var missed = false; + cm.display.pollingFast = true; + function p() { + var changed = readInput(cm); + if (!changed && !missed) {missed = true; cm.display.poll.set(60, p);} + else {cm.display.pollingFast = false; slowPoll(cm);} + } + cm.display.poll.set(20, p); + } + + // prevInput is a hack to work with IME. If we reset the textarea + // on every change, that breaks IME. So we look for changes + // compared to the previous content instead. (Modern browsers have + // events that indicate IME taking place, but these are not widely + // supported or compatible enough yet to rely on.) + function readInput(cm) { + var input = cm.display.input, prevInput = cm.display.prevInput, doc = cm.doc, sel = doc.sel; + if (!cm.state.focused || hasSelection(input) || isReadOnly(cm) || cm.options.disableInput || cm.state.accessibleTextareaWaiting) return false; + if (cm.state.pasteIncoming && cm.state.fakedLastChar) { + input.value = input.value.substring(0, input.value.length - 1); + cm.state.fakedLastChar = false; + } + var text = input.value; + if (text == prevInput && posEq(sel.from, sel.to)) return false; + if (ie && !ie_lt9 && cm.display.inputHasSelection === text) { + resetInput(cm, true); + return false; + } + + var withOp = !cm.curOp; + if (withOp) startOperation(cm); + sel.shift = false; + var same = 0, l = Math.min(prevInput.length, text.length); + while (same < l && prevInput.charCodeAt(same) == text.charCodeAt(same)) ++same; + var from = sel.from, to = sel.to; + var inserted = text.slice(same); + if (same < prevInput.length) + from = Pos(from.line, from.ch - (prevInput.length - same)); + else if (cm.state.overwrite && posEq(from, to) && !cm.state.pasteIncoming) + to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + inserted.length)); + + var updateInput = cm.curOp.updateInput; + var changeEvent = {from: from, to: to, text: splitLines(inserted), + origin: cm.state.pasteIncoming ? "paste" : cm.state.cutIncoming ? "cut" : "+input"}; + makeChange(cm.doc, changeEvent, "end"); + cm.curOp.updateInput = updateInput; + signalLater(cm, "inputRead", cm, changeEvent); + if (inserted && !cm.state.pasteIncoming && cm.options.electricChars && + cm.options.smartIndent && sel.head.ch < 100) { + var electric = cm.getModeAt(sel.head).electricChars; + if (electric) for (var i = 0; i < electric.length; i++) + if (inserted.indexOf(electric.charAt(i)) > -1) { + indentLine(cm, sel.head.line, "smart"); + break; + } + } + + if (text.length > 1000 || text.indexOf("\n") > -1) input.value = cm.display.prevInput = ""; + else cm.display.prevInput = text; + if (withOp) endOperation(cm); + cm.state.pasteIncoming = cm.state.cutIncoming = false; + return true; + } + + function resetInput(cm, user) { + var minimal, selected, doc = cm.doc; + if (!posEq(doc.sel.from, doc.sel.to)) { + cm.display.prevInput = ""; + minimal = false && hasCopyEvent && + (doc.sel.to.line - doc.sel.from.line > 100 || (selected = cm.getSelection()).length > 1000); + var content = minimal ? "-" : selected || cm.getSelection(); + cm.display.input.value = content; + if (cm.state.focused) selectInput(cm.display.input); + if (ie && !ie_lt9) cm.display.inputHasSelection = content; + } else if (user && !cm.state.accessibleTextareaWaiting) { + cm.display.prevInput = cm.display.input.value = ""; + if (ie && !ie_lt9) cm.display.inputHasSelection = null; + } + cm.display.inaccurateSelection = minimal; + } + + function focusInput(cm) { + if (cm.options.readOnly != "nocursor" && (!mobile || document.activeElement != cm.display.input)) + cm.display.input.focus(); + } + + function isReadOnly(cm) { + return cm.options.readOnly || cm.doc.cantEdit; + } + + // EVENT HANDLERS + + function registerEventHandlers(cm) { + var d = cm.display; + on(d.scroller, "mousedown", operation(cm, onMouseDown)); + if (old_ie) + on(d.scroller, "dblclick", operation(cm, function(e) { + if (signalDOMEvent(cm, e)) return; + var pos = posFromMouse(cm, e); + if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) return; + e_preventDefault(e); + var word = findWordAt(getLine(cm.doc, pos.line).text, pos); + extendSelection(cm.doc, word.from, word.to); + })); + else + on(d.scroller, "dblclick", function(e) { signalDOMEvent(cm, e) || e_preventDefault(e); }); + on(d.lineSpace, "selectstart", function(e) { + if (!eventInWidget(d, e)) e_preventDefault(e); + }); // Gecko browsers fire contextmenu *after* opening the menu, at // which point we can't mess with it anymore. Context menu is // handled in onMouseDown for Gecko. - if (!gecko) connect(scroller, "contextmenu", onContextMenu); - connect(scroller, "scroll", function() { - lastScrollPos = scroller.scrollTop; - updateDisplay([]); - if (options.fixedGutter) gutter.style.left = scroller.scrollLeft + "px"; - if (options.onScroll) options.onScroll(instance); - }); - connect(window, "resize", function() {updateDisplay(true);}); - connect(input, "keyup", operation(onKeyUp)); - connect(input, "input", fastPoll); - connect(input, "keydown", operation(onKeyDown)); - connect(input, "keypress", operation(onKeyPress)); - connect(input, "focus", onFocus); - connect(input, "blur", onBlur); + if (!captureMiddleClick) on(d.scroller, "contextmenu", function(e) {onContextMenu(cm, e);}); - connect(scroller, "dragenter", e_stop); - connect(scroller, "dragover", e_stop); - connect(scroller, "drop", operation(onDrop)); - connect(scroller, "paste", function(){focusInput(); fastPoll();}); - connect(input, "paste", fastPoll); - connect(input, "cut", operation(function(){ - if (!options.readOnly) replaceSelection(""); + on(d.scroller, "scroll", function() { + if (d.scroller.clientHeight) { + setScrollTop(cm, d.scroller.scrollTop); + setScrollLeft(cm, d.scroller.scrollLeft, true); + signal(cm, "scroll", cm); + } + }); + on(d.scrollbarV, "scroll", function() { + if (d.scroller.clientHeight) setScrollTop(cm, d.scrollbarV.scrollTop); + }); + on(d.scrollbarH, "scroll", function() { + if (d.scroller.clientHeight) setScrollLeft(cm, d.scrollbarH.scrollLeft); + }); + + on(d.scroller, "mousewheel", function(e){onScrollWheel(cm, e);}); + on(d.scroller, "DOMMouseScroll", function(e){onScrollWheel(cm, e);}); + + function reFocus() { if (cm.state.focused) setTimeout(bind(focusInput, cm), 0); } + on(d.scrollbarH, "mousedown", reFocus); + on(d.scrollbarV, "mousedown", reFocus); + // Prevent wrapper from ever scrolling + on(d.wrapper, "scroll", function() { d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; }); + + var resizeTimer; + function onResize() { + if (resizeTimer == null) resizeTimer = setTimeout(function() { + resizeTimer = null; + // Might be a text scaling operation, clear size caches. + d.cachedCharWidth = d.cachedTextHeight = knownScrollbarWidth = null; + clearCaches(cm); + runInOp(cm, bind(regChange, cm)); + }, 100); + } + on(window, "resize", onResize); + // Above handler holds on to the editor and its data structures. + // Here we poll to unregister it when the editor is no longer in + // the document, so that it can be garbage-collected. + function unregister() { + for (var p = d.wrapper.parentNode; p && p != document.body; p = p.parentNode) {} + if (p) setTimeout(unregister, 5000); + else off(window, "resize", onResize); + } + setTimeout(unregister, 5000); + + on(d.input, "keyup", operation(cm, function(e) { + if (signalDOMEvent(cm, e) || cm.options.onKeyEvent && cm.options.onKeyEvent(cm, addStop(e))) return; + if (e.keyCode == 16) cm.doc.sel.shift = false; })); + on(d.input, "input", function() { + if (ie && !ie_lt9 && cm.display.inputHasSelection) cm.display.inputHasSelection = null; + fastPoll(cm); + }); + on(d.input, "keydown", operation(cm, onKeyDown)); + on(d.input, "keypress", operation(cm, onKeyPress)); + on(d.input, "focus", bind(onFocus, cm)); + on(d.input, "blur", bind(onBlur, cm)); + + function drag_(e) { + if (signalDOMEvent(cm, e) || cm.options.onDragEvent && cm.options.onDragEvent(cm, addStop(e))) return; + e_stop(e); + } + if (cm.options.dragDrop) { + on(d.scroller, "dragstart", function(e){onDragStart(cm, e);}); + on(d.scroller, "dragenter", drag_); + on(d.scroller, "dragover", drag_); + on(d.scroller, "drop", operation(cm, onDrop)); + } + on(d.scroller, "paste", function(e) { + if (eventInWidget(d, e)) return; + focusInput(cm); + fastPoll(cm); + }); + on(d.input, "paste", function() { + // Workaround for webkit bug https://bugs.webkit.org/show_bug.cgi?id=90206 + // Add a char to the end of textarea before paste occur so that + // selection doesn't span to the end of textarea. + if (webkit && !cm.state.fakedLastChar && !(new Date - cm.state.lastMiddleDown < 200)) { + var start = d.input.selectionStart, end = d.input.selectionEnd; + d.input.value += "$"; + d.input.selectionStart = start; + d.input.selectionEnd = end; + cm.state.fakedLastChar = true; + } + cm.state.pasteIncoming = true; + fastPoll(cm); + }); + + function prepareCopy(e) { + if (d.inaccurateSelection) { + d.prevInput = ""; + d.inaccurateSelection = false; + d.input.value = cm.getSelection(); + selectInput(d.input); + } + if (e.type == "cut") cm.state.cutIncoming = true; + } + on(d.input, "cut", prepareCopy); + on(d.input, "copy", prepareCopy); // Needed to handle Tab key in KHTML - if (khtml) connect(code, "mouseup", function() { - if (document.activeElement == input) input.blur(); - focusInput(); + if (khtml) on(d.sizer, "mouseup", function() { + if (document.activeElement == d.input) d.input.blur(); + focusInput(cm); }); + } - // IE throws unspecified error in certain cases, when - // trying to access activeElement before onload - var hasFocus; try { hasFocus = (document.activeElement == input); } catch(e) { } - if (hasFocus || options.autofocus) setTimeout(onFocus, 20); - else onBlur(); - - function isLine(l) {return l >= 0 && l < doc.size;} - // The instance object that we'll return. Mostly calls out to - // local functions in the CodeMirror function. Some do some extra - // range checking and/or clipping. operation is used to wrap the - // call so that changes it makes are tracked, and the display is - // updated afterwards. - var instance = wrapper.CodeMirror = { - getValue: getValue, - setValue: operation(setValue), - getSelection: getSelection, - replaceSelection: operation(replaceSelection), - focus: function(){window.focus(); focusInput(); onFocus(); fastPoll();}, - setOption: function(option, value) { - var oldVal = options[option]; - options[option] = value; - if (option == "mode" || option == "indentUnit") loadMode(); - else if (option == "readOnly" && value == "nocursor") {onBlur(); input.blur();} - else if (option == "readOnly" && !value) {resetInput(true);} - else if (option == "theme") themeChanged(); - else if (option == "lineWrapping" && oldVal != value) operation(wrappingChanged)(); - else if (option == "tabSize") updateDisplay(true); - if (option == "lineNumbers" || option == "gutter" || option == "firstLineNumber" || option == "theme") { - gutterChanged(); - updateDisplay(true); - } - }, - getOption: function(option) {return options[option];}, - undo: operation(undo), - redo: operation(redo), - indentLine: operation(function(n, dir) { - if (typeof dir != "string") { - if (dir == null) dir = options.smartIndent ? "smart" : "prev"; - else dir = dir ? "add" : "subtract"; - } - if (isLine(n)) indentLine(n, dir); - }), - indentSelection: operation(indentSelected), - historySize: function() {return {undo: history.done.length, redo: history.undone.length};}, - clearHistory: function() {history = new History();}, - matchBrackets: operation(function(){matchBrackets(true);}), - getTokenAt: operation(function(pos) { - pos = clipPos(pos); - return getLine(pos.line).getTokenAt(mode, getStateBefore(pos.line), pos.ch); - }), - getStateAfter: function(line) { - line = clipLine(line == null ? doc.size - 1: line); - return getStateBefore(line + 1); - }, - cursorCoords: function(start, mode) { - if (start == null) start = sel.inverted; - return this.charCoords(start ? sel.from : sel.to, mode); - }, - charCoords: function(pos, mode) { - pos = clipPos(pos); - if (mode == "local") return localCoords(pos, false); - if (mode == "div") return localCoords(pos, true); - return pageCoords(pos); - }, - coordsChar: function(coords) { - var off = eltOffset(lineSpace); - return coordsChar(coords.x - off.left, coords.y - off.top); - }, - markText: operation(markText), - setBookmark: setBookmark, - findMarksAt: findMarksAt, - setMarker: operation(addGutterMarker), - clearMarker: operation(removeGutterMarker), - setLineClass: operation(setLineClass), - hideLine: operation(function(h) {return setLineHidden(h, true);}), - showLine: operation(function(h) {return setLineHidden(h, false);}), - onDeleteLine: function(line, f) { - if (typeof line == "number") { - if (!isLine(line)) return null; - line = getLine(line); - } - (line.handlers || (line.handlers = [])).push(f); - return line; - }, - lineInfo: lineInfo, - addWidget: function(pos, node, scroll, vert, horiz) { - pos = localCoords(clipPos(pos)); - var top = pos.yBot, left = pos.x; - node.style.position = "absolute"; - code.appendChild(node); - if (vert == "over") top = pos.y; - else if (vert == "near") { - var vspace = Math.max(scroller.offsetHeight, doc.height * textHeight()), - hspace = Math.max(code.clientWidth, lineSpace.clientWidth) - paddingLeft(); - if (pos.yBot + node.offsetHeight > vspace && pos.y > node.offsetHeight) - top = pos.y - node.offsetHeight; - if (left + node.offsetWidth > hspace) - left = hspace - node.offsetWidth; - } - node.style.top = (top + paddingTop()) + "px"; - node.style.left = node.style.right = ""; - if (horiz == "right") { - left = code.clientWidth - node.offsetWidth; - node.style.right = "0px"; - } else { - if (horiz == "left") left = 0; - else if (horiz == "middle") left = (code.clientWidth - node.offsetWidth) / 2; - node.style.left = (left + paddingLeft()) + "px"; - } - if (scroll) - scrollIntoView(left, top, left + node.offsetWidth, top + node.offsetHeight); - }, - - lineCount: function() {return doc.size;}, - clipPos: clipPos, - getCursor: function(start) { - if (start == null) start = sel.inverted; - return copyPos(start ? sel.from : sel.to); - }, - somethingSelected: function() {return !posEq(sel.from, sel.to);}, - setCursor: operation(function(line, ch, user) { - if (ch == null && typeof line.line == "number") setCursor(line.line, line.ch, user); - else setCursor(line, ch, user); - }), - setSelection: operation(function(from, to, user) { - (user ? setSelectionUser : setSelection)(clipPos(from), clipPos(to || from)); - }), - getLine: function(line) {if (isLine(line)) return getLine(line).text;}, - getLineHandle: function(line) {if (isLine(line)) return getLine(line);}, - setLine: operation(function(line, text) { - if (isLine(line)) replaceRange(text, {line: line, ch: 0}, {line: line, ch: getLine(line).text.length}); - }), - removeLine: operation(function(line) { - if (isLine(line)) replaceRange("", {line: line, ch: 0}, clipPos({line: line+1, ch: 0})); - }), - replaceRange: operation(replaceRange), - getRange: function(from, to) {return getRange(clipPos(from), clipPos(to));}, - - triggerOnKeyDown: operation(onKeyDown), - execCommand: function(cmd) {return commands[cmd](instance);}, - // Stuff used by commands, probably not much use to outside code. - moveH: operation(moveH), - deleteH: operation(deleteH), - moveV: operation(moveV), - toggleOverwrite: function() { - if(overwrite){ - overwrite = false; - cursor.className = cursor.className.replace(" CodeMirror-overwrite", ""); - } else { - overwrite = true; - cursor.className += " CodeMirror-overwrite"; - } - }, - - posFromIndex: function(off) { - var lineNo = 0, ch; - doc.iter(0, doc.size, function(line) { - var sz = line.text.length + 1; - if (sz > off) { ch = off; return true; } - off -= sz; - ++lineNo; - }); - return clipPos({line: lineNo, ch: ch}); - }, - indexFromPos: function (coords) { - if (coords.line < 0 || coords.ch < 0) return 0; - var index = coords.ch; - doc.iter(0, coords.line, function (line) { - index += line.text.length + 1; - }); - return index; - }, - scrollTo: function(x, y) { - if (x != null) scroller.scrollLeft = x; - if (y != null) scroller.scrollTop = y; - updateDisplay([]); - }, - - operation: function(f){return operation(f)();}, - refresh: function(){ - updateDisplay(true); - if (scroller.scrollHeight > lastScrollPos) - scroller.scrollTop = lastScrollPos; - }, - getInputField: function(){return input;}, - getWrapperElement: function(){return wrapper;}, - getScrollerElement: function(){return scroller;}, - getGutterElement: function(){return gutter;} - }; - - function getLine(n) { return getLineAt(doc, n); } - function updateLineHeight(line, height) { - gutterDirty = true; - var diff = height - line.height; - for (var n = line; n; n = n.parent) n.height += diff; + function eventInWidget(display, e) { + for (var n = e_target(e); n != display.wrapper; n = n.parentNode) { + if (!n || n.ignoreEvents || n.parentNode == display.sizer && n != display.mover) return true; } + } - function setValue(code) { - var top = {line: 0, ch: 0}; - updateLines(top, {line: doc.size - 1, ch: getLine(doc.size-1).text.length}, - splitLines(code), top, top); - updateInput = true; + function posFromMouse(cm, e, liberal) { + var display = cm.display; + if (!liberal) { + var target = e_target(e); + if (target == display.scrollbarH || target == display.scrollbarH.firstChild || + target == display.scrollbarV || target == display.scrollbarV.firstChild || + target == display.scrollbarFiller || target == display.gutterFiller) return null; } - function getValue(code) { - var text = []; - doc.iter(0, doc.size, function(line) { text.push(line.text); }); - return text.join("\n"); + var x, y, space = getRect(display.lineSpace); + // Fails unpredictably on IE[67] when mouse is dragged around quickly. + try { x = e.clientX; y = e.clientY; } catch (e) { return null; } + return coordsChar(cm, x - space.left, y - space.top); + } + + var lastClick, lastDoubleClick; + function onMouseDown(e) { + if (signalDOMEvent(this, e)) return; + var cm = this, display = cm.display, doc = cm.doc, sel = doc.sel; + sel.shift = e.shiftKey; + + if (eventInWidget(display, e)) { + if (!webkit) { + display.scroller.draggable = false; + setTimeout(function(){display.scroller.draggable = true;}, 100); + } + return; } + if (clickInGutter(cm, e)) return; + var start = posFromMouse(cm, e); - function onMouseDown(e) { - setShift(e_prop(e, "shiftKey")); - // Check whether this is a click in a widget - for (var n = e_target(e); n != wrapper; n = n.parentNode) - if (n.parentNode == code && n != mover) return; + switch (e_button(e)) { + case 3: + if (captureMiddleClick) onContextMenu.call(cm, cm, e); + return; + case 2: + if (webkit) cm.state.lastMiddleDown = +new Date; + if (start) extendSelection(cm.doc, start); + setTimeout(bind(focusInput, cm), 20); + e_preventDefault(e); + return; + } + // For button 1, if it was clicked inside the editor + // (posFromMouse returning non-null), we have to adjust the + // selection. + if (!start) {if (e_target(e) == display.scroller) e_preventDefault(e); return;} - // See if this is a click in the gutter - for (var n = e_target(e); n != wrapper; n = n.parentNode) - if (n.parentNode == gutterText) { - if (options.onGutterClick) - options.onGutterClick(instance, indexOf(gutterText.childNodes, n) + showingFrom, e); - return e_preventDefault(e); + if (!cm.state.focused) onFocus(cm); + + var now = +new Date, type = "single"; + if (lastDoubleClick && lastDoubleClick.time > now - 400 && posEq(lastDoubleClick.pos, start)) { + type = "triple"; + e_preventDefault(e); + setTimeout(bind(focusInput, cm), 20); + selectLine(cm, start.line); + } else if (lastClick && lastClick.time > now - 400 && posEq(lastClick.pos, start)) { + type = "double"; + lastDoubleClick = {time: now, pos: start}; + e_preventDefault(e); + var word = findWordAt(getLine(doc, start.line).text, start); + extendSelection(cm.doc, word.from, word.to); + } else { lastClick = {time: now, pos: start}; } + + var last = start; + if (cm.options.dragDrop && dragAndDrop && !isReadOnly(cm) && !posEq(sel.from, sel.to) && + !posLess(start, sel.from) && !posLess(sel.to, start) && type == "single") { + var dragEnd = operation(cm, function(e2) { + if (webkit) display.scroller.draggable = false; + cm.state.draggingText = false; + off(document, "mouseup", dragEnd); + off(display.scroller, "drop", dragEnd); + if (Math.abs(e.clientX - e2.clientX) + Math.abs(e.clientY - e2.clientY) < 10) { + e_preventDefault(e2); + extendSelection(cm.doc, start); + focusInput(cm); + // Work around unexplainable focus problem in IE9 (#2127) + if (old_ie && !ie_lt9) + setTimeout(function() {document.body.focus(); focusInput(cm);}, 20); } + }); + // Let the drag handler handle this. + if (webkit) display.scroller.draggable = true; + cm.state.draggingText = dragEnd; + // IE's approach to draggable + if (display.scroller.dragDrop) display.scroller.dragDrop(); + on(document, "mouseup", dragEnd); + on(display.scroller, "drop", dragEnd); + return; + } + e_preventDefault(e); + if (type == "single") extendSelection(cm.doc, clipPos(doc, start)); - var start = posFromMouse(e); + var startstart = sel.from, startend = sel.to, lastPos = start; - switch (e_button(e)) { - case 3: - if (gecko && !mac) onContextMenu(e); - return; - case 2: - if (start) setCursor(start.line, start.ch, true); + function doSelect(cur) { + if (posEq(lastPos, cur)) return; + lastPos = cur; + + if (type == "single") { + extendSelection(cm.doc, clipPos(doc, start), cur); return; } - // For button 1, if it was clicked inside the editor - // (posFromMouse returning non-null), we have to adjust the - // selection. - if (!start) {if (e_target(e) == scroller) e_preventDefault(e); return;} - if (!focused) onFocus(); + startstart = clipPos(doc, startstart); + startend = clipPos(doc, startend); + if (type == "double") { + var word = findWordAt(getLine(doc, cur.line).text, cur); + if (posLess(cur, startstart)) extendSelection(cm.doc, word.from, startend); + else extendSelection(cm.doc, startstart, word.to); + } else if (type == "triple") { + if (posLess(cur, startstart)) extendSelection(cm.doc, startend, clipPos(doc, Pos(cur.line, 0))); + else extendSelection(cm.doc, startstart, clipPos(doc, Pos(cur.line + 1, 0))); + } + } - var now = +new Date; - if (lastDoubleClick && lastDoubleClick.time > now - 400 && posEq(lastDoubleClick.pos, start)) { - e_preventDefault(e); - setTimeout(focusInput, 20); - return selectLine(start.line); - } else if (lastClick && lastClick.time > now - 400 && posEq(lastClick.pos, start)) { - lastDoubleClick = {time: now, pos: start}; - e_preventDefault(e); - return selectWordAt(start); - } else { lastClick = {time: now, pos: start}; } + var editorSize = getRect(display.wrapper); + // Used to ensure timeout re-tries don't fire when another extend + // happened in the meantime (clearTimeout isn't reliable -- at + // least on Chrome, the timeouts still happen even when cleared, + // if the clear happens after their scheduled firing time). + var counter = 0; - var last = start, going; - if (dragAndDrop && !options.readOnly && !posEq(sel.from, sel.to) && - !posLess(start, sel.from) && !posLess(sel.to, start)) { - // Let the drag handler handle this. - if (webkit) lineSpace.draggable = true; - var up = connect(document, "mouseup", operation(function(e2) { - if (webkit) lineSpace.draggable = false; - draggingText = false; - up(); - if (Math.abs(e.clientX - e2.clientX) + Math.abs(e.clientY - e2.clientY) < 10) { - e_preventDefault(e2); - setCursor(start.line, start.ch, true); - focusInput(); + function extend(e) { + var curCount = ++counter; + var cur = posFromMouse(cm, e, true); + if (!cur) return; + if (!posEq(cur, last)) { + if (!cm.state.focused) onFocus(cm); + last = cur; + doSelect(cur); + var visible = visibleLines(display, doc); + if (cur.line >= visible.to || cur.line < visible.from) + setTimeout(operation(cm, function(){if (counter == curCount) extend(e);}), 150); + } else { + var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0; + if (outside) setTimeout(operation(cm, function() { + if (counter != curCount) return; + display.scroller.scrollTop += outside; + extend(e); + }), 50); + } + } + + function done(e) { + counter = Infinity; + e_preventDefault(e); + focusInput(cm); + off(document, "mousemove", move); + off(document, "mouseup", up); + } + + var move = operation(cm, function(e) { + if (!old_ie && !e_button(e)) done(e); + else extend(e); + }); + var up = operation(cm, done); + on(document, "mousemove", move); + on(document, "mouseup", up); + } + + function gutterEvent(cm, e, type, prevent, signalfn) { + try { var mX = e.clientX, mY = e.clientY; } + catch(e) { return false; } + if (mX >= Math.floor(getRect(cm.display.gutters).right)) return false; + if (prevent) e_preventDefault(e); + + var display = cm.display; + var lineBox = getRect(display.lineDiv); + + if (mY > lineBox.bottom || !hasHandler(cm, type)) return e_defaultPrevented(e); + mY -= lineBox.top - display.viewOffset; + + for (var i = 0; i < cm.options.gutters.length; ++i) { + var g = display.gutters.childNodes[i]; + if (g && getRect(g).right >= mX) { + var line = lineAtHeight(cm.doc, mY); + var gutter = cm.options.gutters[i]; + signalfn(cm, type, cm, line, gutter, e); + return e_defaultPrevented(e); + } + } + } + + function contextMenuInGutter(cm, e) { + if (!hasHandler(cm, "gutterContextMenu")) return false; + return gutterEvent(cm, e, "gutterContextMenu", false, signal); + } + + function clickInGutter(cm, e) { + return gutterEvent(cm, e, "gutterClick", true, signalLater); + } + + // Kludge to work around strange IE behavior where it'll sometimes + // re-fire a series of drag-related events right after the drop (#1551) + var lastDrop = 0; + + function onDrop(e) { + var cm = this; + if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e) || (cm.options.onDragEvent && cm.options.onDragEvent(cm, addStop(e)))) + return; + e_preventDefault(e); + if (ie) lastDrop = +new Date; + var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files; + if (!pos || isReadOnly(cm)) return; + if (files && files.length && window.FileReader && window.File) { + var n = files.length, text = Array(n), read = 0; + var loadFile = function(file, i) { + var reader = new FileReader; + reader.onload = function() { + text[i] = reader.result; + if (++read == n) { + pos = clipPos(cm.doc, pos); + makeChange(cm.doc, {from: pos, to: pos, text: splitLines(text.join("\n")), origin: "paste"}, "around"); } - }), true); - draggingText = true; - // IE's approach to draggable - if (lineSpace.dragDrop) lineSpace.dragDrop(); + }; + reader.readAsText(file); + }; + for (var i = 0; i < n; ++i) loadFile(files[i], i); + } else { + // Don't do a replace if the drop happened inside of the selected text. + if (cm.state.draggingText && !(posLess(pos, cm.doc.sel.from) || posLess(cm.doc.sel.to, pos))) { + cm.state.draggingText(e); + // Ensure the editor is re-focused + setTimeout(bind(focusInput, cm), 20); return; } - e_preventDefault(e); - setCursor(start.line, start.ch, true); - - function extend(e) { - var cur = posFromMouse(e, true); - if (cur && !posEq(cur, last)) { - if (!focused) onFocus(); - last = cur; - setSelectionUser(start, cur); - updateInput = false; - var visible = visibleLines(); - if (cur.line >= visible.to || cur.line < visible.from) - going = setTimeout(operation(function(){extend(e);}), 150); - } - } - - function done(e) { - clearTimeout(going); - var cur = posFromMouse(e); - if (cur) setSelectionUser(start, cur); - e_preventDefault(e); - focusInput(); - updateInput = true; - move(); up(); - } - var move = connect(document, "mousemove", operation(function(e) { - clearTimeout(going); - e_preventDefault(e); - if (!ie && !e_button(e)) done(e); - else extend(e); - }), true); - var up = connect(document, "mouseup", operation(done), true); - } - function onDoubleClick(e) { - for (var n = e_target(e); n != wrapper; n = n.parentNode) - if (n.parentNode == gutterText) return e_preventDefault(e); - var start = posFromMouse(e); - if (!start) return; - lastDoubleClick = {time: +new Date, pos: start}; - e_preventDefault(e); - selectWordAt(start); - } - function onDrop(e) { - e.preventDefault(); - var pos = posFromMouse(e, true), files = e.dataTransfer.files; - if (!pos || options.readOnly) return; - if (files && files.length && window.FileReader && window.File) { - function loadFile(file, i) { - var reader = new FileReader; - reader.onload = function() { - text[i] = reader.result; - if (++read == n) { - pos = clipPos(pos); - operation(function() { - var end = replaceRange(text.join(""), pos, pos); - setSelectionUser(pos, end); - })(); - } - }; - reader.readAsText(file); - } - var n = files.length, text = Array(n), read = 0; - for (var i = 0; i < n; ++i) loadFile(files[i], i); - } - else { - try { - var text = e.dataTransfer.getData("Text"); - if (text) { - var curFrom = sel.from, curTo = sel.to; - setSelectionUser(pos, pos); - if (draggingText) replaceRange("", curFrom, curTo); - replaceSelection(text); - focusInput(); - } - } - catch(e){} - } - } - function onDragStart(e) { - var txt = getSelection(); - e.dataTransfer.setData("Text", txt); - - // Use dummy image instead of default browsers image. - if (gecko || chrome) { - var img = document.createElement('img'); - img.scr = 'data:image/gif;base64,R0lGODdhAgACAIAAAAAAAP///ywAAAAAAgACAAACAoRRADs='; //1x1 image - e.dataTransfer.setDragImage(img, 0, 0); - } - } - - function doHandleBinding(bound, dropShift) { - if (typeof bound == "string") { - bound = commands[bound]; - if (!bound) return false; - } - var prevShift = shiftSelecting; try { - if (options.readOnly) suppressEdits = true; - if (dropShift) shiftSelecting = null; - bound(instance); - } catch(e) { - if (e != Pass) throw e; - return false; - } finally { - shiftSelecting = prevShift; - suppressEdits = false; - } - return true; - } - function handleKeyBinding(e) { - // Handle auto keymap transitions - var startMap = getKeyMap(options.keyMap), next = startMap.auto; - clearTimeout(maybeTransition); - if (next && !isModifierKey(e)) maybeTransition = setTimeout(function() { - if (getKeyMap(options.keyMap) == startMap) { - options.keyMap = (next.call ? next.call(null, instance) : next); + var text = e.dataTransfer.getData("Text"); + if (text) { + var curFrom = cm.doc.sel.from, curTo = cm.doc.sel.to; + setSelection(cm.doc, pos, pos); + if (cm.state.draggingText) replaceRange(cm.doc, "", curFrom, curTo, "paste"); + cm.replaceSelection(text, null, "paste"); + focusInput(cm); } - }, 50); + } + catch(e){} + } + } - var name = keyNames[e_prop(e, "keyCode")], handled = false; - if (name == null || e.altGraphKey) return false; - if (e_prop(e, "altKey")) name = "Alt-" + name; - if (e_prop(e, "ctrlKey")) name = "Ctrl-" + name; - if (e_prop(e, "metaKey")) name = "Cmd-" + name; + function onDragStart(cm, e) { + if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return; } + if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) return; - if (e_prop(e, "shiftKey")) { - handled = lookupKey("Shift-" + name, options.extraKeys, options.keyMap, - function(b) {return doHandleBinding(b, true);}) - || lookupKey(name, options.extraKeys, options.keyMap, function(b) { - if (typeof b == "string" && /^go[A-Z]/.test(b)) return doHandleBinding(b); - }); + var txt = cm.getSelection(); + e.dataTransfer.setData("Text", txt); + + // Use dummy image instead of default browsers image. + // Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there. + if (e.dataTransfer.setDragImage && !safari) { + var img = elt("img", null, null, "position: fixed; left: 0; top: 0;"); + img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="; + if (opera) { + img.width = img.height = 1; + cm.display.wrapper.appendChild(img); + // Force a relayout, or Opera won't use our image for some obscure reason + img._top = img.offsetTop; + } + e.dataTransfer.setDragImage(img, 0, 0); + if (opera) img.parentNode.removeChild(img); + } + } + + function setScrollTop(cm, val) { + if (Math.abs(cm.doc.scrollTop - val) < 2) return; + cm.doc.scrollTop = val; + if (!gecko) updateDisplay(cm, [], val); + if (cm.display.scroller.scrollTop != val) cm.display.scroller.scrollTop = val; + if (cm.display.scrollbarV.scrollTop != val) cm.display.scrollbarV.scrollTop = val; + if (gecko) updateDisplay(cm, []); + startWorker(cm, 100); + } + function setScrollLeft(cm, val, isScroller) { + if (isScroller ? val == cm.doc.scrollLeft : Math.abs(cm.doc.scrollLeft - val) < 2) return; + val = Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.clientWidth); + cm.doc.scrollLeft = val; + alignHorizontally(cm); + if (cm.display.scroller.scrollLeft != val) cm.display.scroller.scrollLeft = val; + if (cm.display.scrollbarH.scrollLeft != val) cm.display.scrollbarH.scrollLeft = val; + } + + // Since the delta values reported on mouse wheel events are + // unstandardized between browsers and even browser versions, and + // generally horribly unpredictable, this code starts by measuring + // the scroll effect that the first few mouse wheel events have, + // and, from that, detects the way it can convert deltas to pixel + // offsets afterwards. + // + // The reason we want to know the amount a wheel event will scroll + // is that it gives us a chance to update the display before the + // actual scrolling happens, reducing flickering. + + var wheelSamples = 0, wheelPixelsPerUnit = null; + // Fill in a browser-detected starting value on browsers where we + // know one. These don't have to be accurate -- the result of them + // being wrong would just be a slight flicker on the first wheel + // scroll (if it is large enough). + if (old_ie) wheelPixelsPerUnit = -.53; + else if (gecko) wheelPixelsPerUnit = 15; + else if (chrome) wheelPixelsPerUnit = -.7; + else if (safari) wheelPixelsPerUnit = -1/3; + + function onScrollWheel(cm, e) { + var dx = e.wheelDeltaX, dy = e.wheelDeltaY; + if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) dx = e.detail; + if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) dy = e.detail; + else if (dy == null) dy = e.wheelDelta; + + var display = cm.display, scroll = display.scroller; + // Quit if there's nothing to scroll here + if (!(dx && scroll.scrollWidth > scroll.clientWidth || + dy && scroll.scrollHeight > scroll.clientHeight)) return; + + // Webkit browsers on OS X abort momentum scrolls when the target + // of the scroll event is removed from the scrollable element. + // This hack (see related code in patchDisplay) makes sure the + // element is kept around. + if (dy && mac && webkit) { + for (var cur = e.target; cur != scroll; cur = cur.parentNode) { + if (cur.lineObj) { + cm.display.currentWheelTarget = cur; + break; + } + } + } + + // On some browsers, horizontal scrolling will cause redraws to + // happen before the gutter has been realigned, causing it to + // wriggle around in a most unseemly way. When we have an + // estimated pixels/delta value, we just handle horizontal + // scrolling entirely here. It'll be slightly off from native, but + // better than glitching out. + if (dx && !gecko && !opera && wheelPixelsPerUnit != null) { + if (dy) + setScrollTop(cm, Math.max(0, Math.min(scroll.scrollTop + dy * wheelPixelsPerUnit, scroll.scrollHeight - scroll.clientHeight))); + setScrollLeft(cm, Math.max(0, Math.min(scroll.scrollLeft + dx * wheelPixelsPerUnit, scroll.scrollWidth - scroll.clientWidth))); + e_preventDefault(e); + display.wheelStartX = null; // Abort measurement, if in progress + return; + } + + if (dy && wheelPixelsPerUnit != null) { + var pixels = dy * wheelPixelsPerUnit; + var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight; + if (pixels < 0) top = Math.max(0, top + pixels - 50); + else bot = Math.min(cm.doc.height, bot + pixels + 50); + updateDisplay(cm, [], {top: top, bottom: bot}); + } + + if (wheelSamples < 20) { + if (display.wheelStartX == null) { + display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.scrollTop; + display.wheelDX = dx; display.wheelDY = dy; + setTimeout(function() { + if (display.wheelStartX == null) return; + var movedX = scroll.scrollLeft - display.wheelStartX; + var movedY = scroll.scrollTop - display.wheelStartY; + var sample = (movedY && display.wheelDY && movedY / display.wheelDY) || + (movedX && display.wheelDX && movedX / display.wheelDX); + display.wheelStartX = display.wheelStartY = null; + if (!sample) return; + wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1); + ++wheelSamples; + }, 200); } else { - handled = lookupKey(name, options.extraKeys, options.keyMap, doHandleBinding); - } - if (handled) { - e_preventDefault(e); - if (ie) { e.oldKeyCode = e.keyCode; e.keyCode = 0; } - } - return handled; - } - function handleCharBinding(e, ch) { - var handled = lookupKey("'" + ch + "'", options.extraKeys, - options.keyMap, doHandleBinding); - if (handled) e_preventDefault(e); - return handled; - } - - var lastStoppedKey = null, maybeTransition; - function onKeyDown(e) { - if (!focused) onFocus(); - if (ie && e.keyCode == 27) { e.returnValue = false; } - if (pollingFast) { if (readInput()) pollingFast = false; } - if (options.onKeyEvent && options.onKeyEvent(instance, addStop(e))) return; - var code = e_prop(e, "keyCode"); - // IE does strange things with escape. - setShift(code == 16 || e_prop(e, "shiftKey")); - // First give onKeyEvent option a chance to handle this. - var handled = handleKeyBinding(e); - if (window.opera) { - lastStoppedKey = handled ? code : null; - // Opera has no cut event... we try to at least catch the key combo - if (!handled && code == 88 && e_prop(e, mac ? "metaKey" : "ctrlKey")) - replaceSelection(""); + display.wheelDX += dx; display.wheelDY += dy; } } - function onKeyPress(e) { - if (pollingFast) readInput(); - if (options.onKeyEvent && options.onKeyEvent(instance, addStop(e))) return; - var keyCode = e_prop(e, "keyCode"), charCode = e_prop(e, "charCode"); - if (window.opera && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return;} - if (((window.opera && !e.which) || khtml) && handleKeyBinding(e)) return; - var ch = String.fromCharCode(charCode == null ? keyCode : charCode); - if (options.electricChars && mode.electricChars && options.smartIndent && !options.readOnly) { - if (mode.electricChars.indexOf(ch) > -1) - setTimeout(operation(function() {indentLine(sel.to.line, "smart");}), 75); + } + + function doHandleBinding(cm, bound, dropShift) { + if (typeof bound == "string") { + bound = commands[bound]; + if (!bound) return false; + } + // Ensure previous input has been read, so that the handler sees a + // consistent view of the document + if (cm.display.pollingFast && readInput(cm)) cm.display.pollingFast = false; + var doc = cm.doc, prevShift = doc.sel.shift, done = false; + try { + if (isReadOnly(cm)) cm.state.suppressEdits = true; + if (dropShift) doc.sel.shift = false; + done = bound(cm) != Pass; + } finally { + doc.sel.shift = prevShift; + cm.state.suppressEdits = false; + } + return done; + } + + function allKeyMaps(cm) { + var maps = cm.state.keyMaps.slice(0); + if (cm.options.extraKeys) maps.push(cm.options.extraKeys); + maps.push(cm.options.keyMap); + return maps; + } + + var maybeTransition; + function handleKeyBinding(cm, e) { + // Handle auto keymap transitions + var startMap = getKeyMap(cm.options.keyMap), next = startMap.auto; + clearTimeout(maybeTransition); + if (next && !isModifierKey(e)) maybeTransition = setTimeout(function() { + if (getKeyMap(cm.options.keyMap) == startMap) { + cm.options.keyMap = (next.call ? next.call(null, cm) : next); + keyMapChanged(cm); } - if (handleCharBinding(e, ch)) return; - fastPoll(); - } - function onKeyUp(e) { - if (options.onKeyEvent && options.onKeyEvent(instance, addStop(e))) return; - if (e_prop(e, "keyCode") == 16) shiftSelecting = null; + }, 50); + + var name = keyName(e, true), handled = false; + if (!name) return false; + var keymaps = allKeyMaps(cm); + + if (e.shiftKey) { + // First try to resolve full name (including 'Shift-'). Failing + // that, see if there is a cursor-motion command (starting with + // 'go') bound to the keyname without 'Shift-'. + handled = lookupKey("Shift-" + name, keymaps, function(b) {return doHandleBinding(cm, b, true);}) + || lookupKey(name, keymaps, function(b) { + if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion) + return doHandleBinding(cm, b); + }); + } else { + handled = lookupKey(name, keymaps, function(b) { return doHandleBinding(cm, b); }); } - function onFocus() { - if (options.readOnly == "nocursor") return; - if (!focused) { - if (options.onFocus) options.onFocus(instance); - focused = true; - if (wrapper.className.search(/\bCodeMirror-focused\b/) == -1) - wrapper.className += " CodeMirror-focused"; - if (!leaveInputAlone) resetInput(true); + if (handled) { + e_preventDefault(e); + restartBlink(cm); + if (ie_lt9) { e.oldKeyCode = e.keyCode; e.keyCode = 0; } + signalLater(cm, "keyHandled", cm, name, e); + } + return handled; + } + + function handleCharBinding(cm, e, ch) { + var handled = lookupKey("'" + ch + "'", allKeyMaps(cm), + function(b) { return doHandleBinding(cm, b, true); }); + if (handled) { + e_preventDefault(e); + restartBlink(cm); + signalLater(cm, "keyHandled", cm, "'" + ch + "'", e); + } + return handled; + } + + var lastStoppedKey = null; + function onKeyDown(e) { + var cm = this; + if (!cm.state.focused) onFocus(cm); + if (signalDOMEvent(cm, e) || cm.options.onKeyEvent && cm.options.onKeyEvent(cm, addStop(e))) return; + if (old_ie && e.keyCode == 27) e.returnValue = false; + var code = e.keyCode; + // IE does strange things with escape. + cm.doc.sel.shift = code == 16 || e.shiftKey; + // First give onKeyEvent option a chance to handle this. + var handled = handleKeyBinding(cm, e); + + // On text input if value was temporaritly set for a screenreader, clear it out. + if (!handled && cm.state.accessibleTextareaWaiting) { + clearAccessibleTextarea(cm); + } + + if (opera) { + lastStoppedKey = handled ? code : null; + // Opera has no cut event... we try to at least catch the key combo + if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKey)) + cm.replaceSelection(""); + } + } + + function onKeyPress(e) { + var cm = this; + if (signalDOMEvent(cm, e) || cm.options.onKeyEvent && cm.options.onKeyEvent(cm, addStop(e))) return; + var keyCode = e.keyCode, charCode = e.charCode; + if (opera && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return;} + if (((opera && (!e.which || e.which < 10)) || khtml) && handleKeyBinding(cm, e)) return; + var ch = String.fromCharCode(charCode == null ? keyCode : charCode); + if (handleCharBinding(cm, e, ch)) return; + if (ie && !ie_lt9) cm.display.inputHasSelection = null; + fastPoll(cm); + } + + function onFocus(cm) { + if (cm.options.readOnly == "nocursor") return; + if (!cm.state.focused) { + signal(cm, "focus", cm); + cm.state.focused = true; + if (cm.display.wrapper.className.search(/\bCodeMirror-focused\b/) == -1) + cm.display.wrapper.className += " CodeMirror-focused"; + if (!cm.curOp) { + resetInput(cm, true); + if (webkit) setTimeout(bind(resetInput, cm, true), 0); // Issue #1730 } - slowPoll(); - restartBlink(); } - function onBlur() { - if (focused) { - if (options.onBlur) options.onBlur(instance); - focused = false; - if (bracketHighlighted) - operation(function(){ - if (bracketHighlighted) { bracketHighlighted(); bracketHighlighted = null; } - })(); - wrapper.className = wrapper.className.replace(" CodeMirror-focused", ""); + slowPoll(cm); + restartBlink(cm); + } + function onBlur(cm) { + if (cm.state.focused) { + signal(cm, "blur", cm); + cm.state.focused = false; + cm.display.wrapper.className = cm.display.wrapper.className.replace(" CodeMirror-focused", ""); + } + clearInterval(cm.display.blinker); + setTimeout(function() {if (!cm.state.focused) cm.doc.sel.shift = false;}, 150); + } + + var detectingSelectAll; + function onContextMenu(cm, e) { + if (signalDOMEvent(cm, e, "contextmenu")) return; + var display = cm.display, sel = cm.doc.sel; + if (eventInWidget(display, e) || contextMenuInGutter(cm, e)) return; + + var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop; + if (!pos || opera) return; // Opera is difficult. + + // Reset the current text selection only if the click is done outside of the selection + // and 'resetSelectionOnContextMenu' option is true. + var reset = cm.options.resetSelectionOnContextMenu; + if (reset && (posEq(sel.from, sel.to) || posLess(pos, sel.from) || !posLess(pos, sel.to))) + operation(cm, setSelection)(cm.doc, pos, pos); + + var oldCSS = display.input.style.cssText; + display.inputDiv.style.position = "absolute"; + display.input.style.cssText = "position: fixed; width: 30px; height: 30px; top: " + (e.clientY - 5) + + "px; left: " + (e.clientX - 5) + "px; z-index: 1000; background: transparent; outline: none;" + + "border-width: 0; outline: none; overflow: hidden; opacity: .05; -ms-opacity: .05; filter: alpha(opacity=5);"; + focusInput(cm); + resetInput(cm, true); + // Adds "Select all" to context menu in FF + if (posEq(sel.from, sel.to)) display.input.value = display.prevInput = " "; + + function prepareSelectAllHack() { + if (display.input.selectionStart != null) { + var extval = display.input.value = "\u200b" + (posEq(sel.from, sel.to) ? "" : display.input.value); + display.prevInput = "\u200b"; + display.input.selectionStart = 1; display.input.selectionEnd = extval.length; } - clearInterval(blinker); - setTimeout(function() {if (!focused) shiftSelecting = null;}, 150); } + function rehide() { + display.inputDiv.style.position = "relative"; + display.input.style.cssText = oldCSS; + if (ie_lt9) display.scrollbarV.scrollTop = display.scroller.scrollTop = scrollPos; + slowPoll(cm); - // Replace the range from from to to by the strings in newText. - // Afterwards, set the selection to selFrom, selTo. - function updateLines(from, to, newText, selFrom, selTo) { - if (suppressEdits) return; - - //This block ensures that widget lines don't have any text inserted on the same line. - if (from.ch > 0 && (newText[0] != '' || newText.length == 1) && getLine(from.line).widgetFunction) { - newText.unshift(''); - var widgetLine = getLine(from.line); - function moveSel(sel) { - if (sel.line == from.line && sel.ch > 0){ - return {line: sel.line + 1, ch: sel.ch - widgetLine.text.length}; - } else if (sel.line > from.line) { - return {line: sel.line + 1, ch: sel.ch}; - } - } - selFrom = moveSel(selFrom, widgetLine); - selTo = moveSel(selTo, widgetLine); + // Try to detect the user choosing select-all + if (display.input.selectionStart != null) { + if (!old_ie || ie_lt9) prepareSelectAllHack(); + clearTimeout(detectingSelectAll); + var i = 0, poll = function(){ + if (display.prevInput == "\u200b" && display.input.selectionStart == 0) + operation(cm, commands.selectAll)(cm); + else if (i++ < 10) detectingSelectAll = setTimeout(poll, 500); + else resetInput(cm); + }; + detectingSelectAll = setTimeout(poll, 200); } - if (to.ch == 0 && (newText[newText.length - 1] != '' || newText.length == 1) && getLine(to.line).widgetFunction) { - newText.push(''); + } + + if (old_ie && !ie_lt9) prepareSelectAllHack(); + if (captureMiddleClick) { + e_stop(e); + var mouseup = function() { + off(window, "mouseup", mouseup); + setTimeout(rehide, 20); + }; + on(window, "mouseup", mouseup); + } else { + setTimeout(rehide, 50); + } + } + + // UPDATING + + var changeEnd = CodeMirror.changeEnd = function(change) { + if (!change.text) return change.to; + return Pos(change.from.line + change.text.length - 1, + lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0)); + }; + + // Make sure a position will be valid after the given change. + function clipPostChange(doc, change, pos) { + if (!posLess(change.from, pos)) return clipPos(doc, pos); + var diff = (change.text.length - 1) - (change.to.line - change.from.line); + if (pos.line > change.to.line + diff) { + var preLine = pos.line - diff, lastLine = doc.first + doc.size - 1; + if (preLine > lastLine) return Pos(lastLine, getLine(doc, lastLine).text.length); + return clipToLen(pos, getLine(doc, preLine).text.length); + } + if (pos.line == change.to.line + diff) + return clipToLen(pos, lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0) + + getLine(doc, change.to.line).text.length - change.to.ch); + var inside = pos.line - change.from.line; + return clipToLen(pos, change.text[inside].length + (inside ? 0 : change.from.ch)); + } + + // Hint can be null|"end"|"start"|"around"|{anchor,head} + function computeSelAfterChange(doc, change, hint) { + if (hint && typeof hint == "object") // Assumed to be {anchor, head} object + return {anchor: clipPostChange(doc, change, hint.anchor), + head: clipPostChange(doc, change, hint.head)}; + + if (hint == "start") return {anchor: change.from, head: change.from}; + + var end = changeEnd(change); + if (hint == "around") return {anchor: change.from, head: end}; + if (hint == "end") return {anchor: end, head: end}; + + // hint is null, leave the selection alone as much as possible + var adjustPos = function(pos) { + if (posLess(pos, change.from)) return pos; + if (!posLess(change.to, pos)) return end; + + var line = pos.line + change.text.length - (change.to.line - change.from.line) - 1, ch = pos.ch; + if (pos.line == change.to.line) ch += end.ch - change.to.ch; + return Pos(line, ch); + }; + return {anchor: adjustPos(doc.sel.anchor), head: adjustPos(doc.sel.head)}; + } + + function filterChange(doc, change, update) { + var obj = { + canceled: false, + from: change.from, + to: change.to, + text: change.text, + origin: change.origin, + cancel: function() { this.canceled = true; } + }; + if (update) obj.update = function(from, to, text, origin) { + if (from) this.from = clipPos(doc, from); + if (to) this.to = clipPos(doc, to); + if (text) this.text = text; + if (origin !== undefined) this.origin = origin; + }; + signal(doc, "beforeChange", doc, obj); + if (doc.cm) signal(doc.cm, "beforeChange", doc.cm, obj); + + if (obj.canceled) return null; + return {from: obj.from, to: obj.to, text: obj.text, origin: obj.origin}; + } + + // Replace the range from from to to by the strings in replacement. + // change is a {from, to, text [, origin]} object + function makeChange(doc, change, selUpdate, ignoreReadOnly) { + if (doc.cm) { + if (!doc.cm.curOp) return operation(doc.cm, makeChange)(doc, change, selUpdate, ignoreReadOnly); + if (doc.cm.state.suppressEdits) return; + } + + if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")) { + change = filterChange(doc, change, true); + if (!change) return; + } + + // Possibly split or suppress the update based on the presence + // of read-only spans in its range. + var split = sawReadOnlySpans && !ignoreReadOnly && removeReadOnlyRanges(doc, change.from, change.to); + if (split) { + for (var i = split.length - 1; i >= 1; --i) + makeChangeNoReadonly(doc, {from: split[i].from, to: split[i].to, text: [""]}); + if (split.length) + makeChangeNoReadonly(doc, {from: split[0].from, to: split[0].to, text: change.text}, selUpdate); + } else { + makeChangeNoReadonly(doc, change, selUpdate); + } + } + + function makeChangeNoReadonly(doc, change, selUpdate) { + if (change.text.length == 1 && change.text[0] == "" && posEq(change.from, change.to)) return; + var selAfter = computeSelAfterChange(doc, change, selUpdate); + addToHistory(doc, change, selAfter, doc.cm ? doc.cm.curOp.id : NaN); + + makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, change)); + var rebased = []; + + linkedDocs(doc, function(doc, sharedHist) { + if (!sharedHist && indexOf(rebased, doc.history) == -1) { + rebaseHist(doc.history, change); + rebased.push(doc.history); } - - if (history) { - var old = []; - doc.iter(from.line, to.line + 1, function(line) { old.push(line.text); }); - history.addChange(from.line, newText.length, old); - while (history.done.length > options.undoDepth) history.done.shift(); - } - updateLinesNoUndo(from, to, newText, selFrom, selTo); - } - function unredoHelper(from, to) { - if (!from.length) return; - var set = from.pop(), out = []; - for (var i = set.length - 1; i >= 0; i -= 1) { - var change = set[i]; - var replaced = [], end = change.start + change.added; - doc.iter(change.start, end, function(line) { replaced.push(line.text); }); - out.push({start: change.start, added: change.old.length, old: replaced}); - var pos = clipPos({line: change.start + change.old.length - 1, - ch: editEnd(replaced[replaced.length-1], change.old[change.old.length-1])}); - updateLinesNoUndo({line: change.start, ch: 0}, {line: end - 1, ch: getLine(end-1).text.length}, change.old, pos, pos); - } - updateInput = true; - to.push(out); - } - function undo() {unredoHelper(history.done, history.undone);} - function redo() {unredoHelper(history.undone, history.done);} + makeChangeSingleDoc(doc, change, null, stretchSpansOverChange(doc, change)); + }); + } - function updateLinesNoUndo(from, to, newText, selFrom, selTo) { - if (suppressEdits) return; - var recomputeMaxLength = false, maxLineLength = maxLine.length; - if (!options.lineWrapping) - doc.iter(from.line, to.line, function(line) { - if (line.text.length == maxLineLength) {recomputeMaxLength = true; return true;} - }); - if (from.line != to.line || newText.length > 1) gutterDirty = true; + function makeChangeFromHistory(doc, type) { + if (doc.cm && doc.cm.state.suppressEdits) return; - var nlines = to.line - from.line, firstLine = getLine(from.line), lastLine = getLine(to.line); - // First adjust the line structure, taking some care to leave highlighting intact. - if (from.ch == 0 && to.ch == 0 && newText[newText.length - 1] == "") { - // This is a whole-line replace. Treated specially to make - // sure line objects move the way they are supposed to. - var added = [], prevLine = null; - if (from.line) { - prevLine = getLine(from.line - 1); - prevLine.fixMarkEnds(lastLine); - } else lastLine.fixMarkStarts(); - for (var i = 0, e = newText.length - 1; i < e; ++i) - added.push(Line.inheritMarks(newText[i], prevLine)); - if (nlines) doc.remove(from.line, nlines, callbacks); - if (added.length) doc.insert(from.line, added); - } else if (firstLine == lastLine) { - if (newText.length == 1) - firstLine.replace(from.ch, to.ch, newText[0]); - else { - lastLine = firstLine.split(to.ch, newText[newText.length-1]); - firstLine.replace(from.ch, null, newText[0]); - firstLine.fixMarkEnds(lastLine); - var added = []; - for (var i = 1, e = newText.length - 1; i < e; ++i) - added.push(Line.inheritMarks(newText[i], firstLine)); - added.push(lastLine); - doc.insert(from.line + 1, added); - } - } else if (newText.length == 1) { - firstLine.replace(from.ch, null, newText[0]); - lastLine.replace(null, to.ch, ""); - firstLine.append(lastLine); - doc.remove(from.line + 1, nlines, callbacks); - } else { - var added = []; - firstLine.replace(from.ch, null, newText[0]); - lastLine.replace(null, to.ch, newText[newText.length-1]); - firstLine.fixMarkEnds(lastLine); - for (var i = 1, e = newText.length - 1; i < e; ++i) - added.push(Line.inheritMarks(newText[i], firstLine)); - if (nlines > 1) doc.remove(from.line + 1, nlines - 1, callbacks); - doc.insert(from.line + 1, added); - } + var hist = doc.history; + var event = (type == "undo" ? hist.done : hist.undone).pop(); + if (!event) return; - // Add these lines to the work array, so that they will be - // highlighted. Adjust work lines if lines were added/removed. - var newWork = [], lendiff = newText.length - nlines - 1; - for (var j = 0, l = work.length; j < l; ++j) { - var task = work[j]; - if (task < from.line) newWork.push(task); - else if (task > to.line) newWork.push(task + lendiff); - } - var hlEnd = from.line + Math.min(newText.length, 500); - highlightLines(from.line, hlEnd); - newWork.push(hlEnd); - work = newWork; - startWorker(100); - // Remember that these lines changed, for updating the display - changes.push({from: from.line, to: to.line + 1, diff: lendiff}); - var changeObj = {from: from, to: to, text: newText}; - if (textChanged) { - for (var cur = textChanged; cur.next; cur = cur.next) {} - cur.next = changeObj; - } else textChanged = changeObj; + var anti = {changes: [], anchorBefore: event.anchorAfter, headBefore: event.headAfter, + anchorAfter: event.anchorBefore, headAfter: event.headBefore, + generation: hist.generation}; + (type == "undo" ? hist.undone : hist.done).push(anti); + hist.generation = event.generation || ++hist.maxGeneration; - - if (options.lineWrapping) { - var perLine = scroller.clientWidth / charWidth() - 3; - doc.iter(from.line, from.line + newText.length, function(line) { - if (line.hidden) return; - var guess = Math.ceil(line.text.length / perLine) || 1; - if (line.widgetFunction) - guess = line.widgetFunction.size(line.text).height / textHeight(); - if (guess != line.height) updateLineHeight(line, guess); - }); - } else { - doc.iter(from.line, from.line + newText.length, function(line) { - var l = line.text; - if (l.length > maxLineLength) { - maxLine = l; maxLineLength = l.length; maxWidth = null; - recomputeMaxLength = false; - } - if (line.widgetFunction) { - var guess = line.widgetFunction.size(line.text).height / textHeight(); - if (guess != line.height) updateLineHeight(line, guess); - } else if (line.height != 1) { - updateLineHeight(line, 1); - } - }); - if (recomputeMaxLength) { - maxLineLength = 0; maxLine = ""; maxWidth = null; - doc.iter(0, doc.size, function(line) { - var l = line.text; - if (l.length > maxLineLength) { - maxLineLength = l.length; maxLine = l; - } - }); - } - } + var filter = hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange"); - // Update the selection - function updateLine(n) {return n <= Math.min(to.line, to.line + lendiff) ? n : n + lendiff;} - setSelection(selFrom, selTo, updateLine(sel.from.line), updateLine(sel.to.line)); - - // Make sure the scroll-size div has the correct height. - if (scroller.clientHeight) - code.style.height = (doc.height * textHeight() + 2 * paddingTop()) + "px"; - } - - function replaceRange(code, from, to) { - from = clipPos(from); - if (!to) to = from; else to = clipPos(to); - code = splitLines(code); - function adjustPos(pos) { - if (posLess(pos, from)) return pos; - if (!posLess(to, pos)) return end; - var line = pos.line + code.length - (to.line - from.line) - 1; - var ch = pos.ch; - if (pos.line == to.line) - ch += code[code.length-1].length - (to.ch - (to.line == from.line ? from.ch : 0)); - return {line: line, ch: ch}; - } - var end; - replaceRange1(code, from, to, function(end1) { - end = end1; - return {from: adjustPos(sel.from), to: adjustPos(sel.to)}; - }); - return end; - } - function replaceSelection(code, collapse) { - replaceRange1(splitLines(code), sel.from, sel.to, function(end) { - if (collapse == "end") return {from: end, to: end}; - else if (collapse == "start") return {from: sel.from, to: sel.from}; - else return {from: sel.from, to: end}; - }); - } - function replaceRange1(code, from, to, computeSel) { - var endch = code.length == 1 ? code[0].length + from.ch : code[code.length-1].length; - var newSel = computeSel({line: from.line + code.length - 1, ch: endch}); - updateLines(from, to, code, newSel.from, newSel.to); - } - - function getRange(from, to) { - var l1 = from.line, l2 = to.line; - if (l1 == l2) return getLine(l1).text.slice(from.ch, to.ch); - var code = [getLine(l1).text.slice(from.ch)]; - doc.iter(l1 + 1, l2, function(line) { code.push(line.text); }); - code.push(getLine(l2).text.slice(0, to.ch)); - return code.join("\n"); - } - function getSelection() { - return getRange(sel.from, sel.to); - } - - var pollingFast = false; // Ensures slowPoll doesn't cancel fastPoll - function slowPoll() { - if (pollingFast) return; - poll.set(options.pollInterval, function() { - startOperation(); - readInput(); - if (focused) slowPoll(); - endOperation(); - }); - } - function fastPoll() { - var missed = false; - pollingFast = true; - function p() { - startOperation(); - var changed = readInput(); - if (!changed && !missed) {missed = true; poll.set(60, p);} - else {pollingFast = false; slowPoll();} - endOperation(); - } - poll.set(20, p); - } - - // Previnput is a hack to work with IME. If we reset the textarea - // on every change, that breaks IME. So we look for changes - // compared to the previous content instead. (Modern browsers have - // events that indicate IME taking place, but these are not widely - // supported or compatible enough yet to rely on.) - var prevInput = ""; - function readInput() { - if (leaveInputAlone || !focused || hasSelection(input) || options.readOnly) return false; - var text = input.value; - if (text == prevInput) return false; - shiftSelecting = null; - var same = 0, l = Math.min(prevInput.length, text.length); - while (same < l && prevInput[same] == text[same]) ++same; - if (same < prevInput.length) - sel.from = {line: sel.from.line, ch: sel.from.ch - (prevInput.length - same)}; - else if (overwrite && posEq(sel.from, sel.to)) - sel.to = {line: sel.to.line, ch: Math.min(getLine(sel.to.line).text.length, sel.to.ch + (text.length - same))}; - replaceSelection(text.slice(same), "end"); - prevInput = text; - return true; - } - function resetInput(user) { - if (!posEq(sel.from, sel.to)) { - prevInput = ""; - input.value = getSelection(); - selectInput(input); - } else if (user) prevInput = input.value = ""; - } - - function focusInput() { - if (options.readOnly != "nocursor") input.focus(); - } - - function scrollEditorIntoView() { - if (!cursor.getBoundingClientRect) return; - var rect = cursor.getBoundingClientRect(); - // IE returns bogus coordinates when the instance sits inside of an iframe and the cursor is hidden - if (ie && rect.top == rect.bottom) return; - var winH = window.innerHeight || Math.max(document.body.offsetHeight, document.documentElement.offsetHeight); - if (rect.top < 0 || rect.bottom > winH) cursor.scrollIntoView(); - } - function scrollCursorIntoView() { - var cursor = localCoords(sel.inverted ? sel.from : sel.to); - var x = options.lineWrapping ? Math.min(cursor.x, lineSpace.offsetWidth) : cursor.x; - return scrollIntoView(x, cursor.y, x, cursor.yBot); - } - function scrollIntoView(x1, y1, x2, y2) { - var pl = paddingLeft(), pt = paddingTop(); - y1 += pt; y2 += pt; x1 += pl; x2 += pl; - var screen = scroller.clientHeight, screentop = scroller.scrollTop, scrolled = false, result = true; - if (y1 < screentop) {scroller.scrollTop = Math.max(0, y1); scrolled = true;} - else if (y2 > screentop + screen) {scroller.scrollTop = y2 - screen; scrolled = true;} - - var screenw = scroller.clientWidth, screenleft = scroller.scrollLeft; - var gutterw = options.fixedGutter ? gutter.clientWidth : 0; - if (x1 < screenleft + gutterw) { - if (x1 < 50) x1 = 0; - scroller.scrollLeft = Math.max(0, x1 - 10 - gutterw); - scrolled = true; - } - else if (x2 > screenw + screenleft - 3) { - scroller.scrollLeft = x2 + 10 - screenw; - scrolled = true; - if (x2 > code.clientWidth) result = false; - } - if (scrolled && options.onScroll) options.onScroll(instance); - return result; - } - - function visibleLines() { - var lh = textHeight(), top = scroller.scrollTop - paddingTop(); - var from_height = Math.max(0, Math.floor(top / lh)); - var to_height = Math.ceil((top + scroller.clientHeight) / lh); - return {from: lineAtHeight(doc, from_height), - to: lineAtHeight(doc, to_height)}; - } - // Uses a set of changes plus the current scroll position to - // determine which DOM updates have to be made, and makes the - // updates. - function updateDisplay(changes, suppressCallback) { - if (!scroller.clientWidth) { - showingFrom = showingTo = displayOffset = 0; + for (var i = event.changes.length - 1; i >= 0; --i) { + var change = event.changes[i]; + change.origin = type; + if (filter && !filterChange(doc, change, false)) { + (type == "undo" ? hist.done : hist.undone).length = 0; return; } - // Compute the new visible window - var visible = visibleLines(); - // Bail out if the visible area is already rendered and nothing changed. - if (changes !== true && changes.length == 0 && visible.from > showingFrom && visible.to < showingTo) return; - var from = Math.max(visible.from - 100, 0), to = Math.min(doc.size, visible.to + 100); - if (showingFrom < from && from - showingFrom < 20) from = showingFrom; - if (showingTo > to && showingTo - to < 20) to = Math.min(doc.size, showingTo); - // Create a range of theoretically intact lines, and punch holes - // in that using the change info. - var intact = changes === true ? [] : - computeIntact([{from: showingFrom, to: showingTo, domStart: 0}], changes); - // Clip off the parts that won't be visible - var intactLines = 0; - for (var i = 0; i < intact.length; ++i) { - var range = intact[i]; - if (range.from < from) {range.domStart += (from - range.from); range.from = from;} - if (range.to > to) range.to = to; - if (range.from >= range.to) intact.splice(i--, 1); - else intactLines += range.to - range.from; - } - if (intactLines == to - from) return; - intact.sort(function(a, b) {return a.domStart - b.domStart;}); + anti.changes.push(historyChangeFromChange(doc, change)); - var th = textHeight(), gutterDisplay = gutter.style.display; - lineDiv.style.display = "none"; - patchDisplay(from, to, intact); - lineDiv.style.display = gutter.style.display = ""; + var after = i ? computeSelAfterChange(doc, change, null) + : {anchor: event.anchorBefore, head: event.headBefore}; + makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change)); + var rebased = []; - // Position the mover div to align with the lines it's supposed - // to be showing (which will cover the visible display) - var different = from != showingFrom || to != showingTo || lastSizeC != scroller.clientHeight + th; - // This is just a bogus formula that detects when the editor is - // resized or the font size changes. - if (different) lastSizeC = scroller.clientHeight + th; - showingFrom = from; showingTo = to; - displayOffset = heightAtLine(doc, from); - mover.style.top = (displayOffset * th) + "px"; - if (scroller.clientHeight) - code.style.height = (doc.height * th + 2 * paddingTop()) + "px"; - - // Since this is all rather error prone, it is honoured with the - // only assertion in the whole file. - if (lineDiv.childNodes.length != showingTo - showingFrom) - throw new Error("BAD PATCH! " + JSON.stringify(intact) + " size=" + (showingTo - showingFrom) + - " nodes=" + lineDiv.childNodes.length); - - if (options.lineWrapping) { - maxWidth = scroller.clientWidth; - var curNode = lineDiv.firstChild, heightChanged = false; - doc.iter(showingFrom, showingTo, function(line) { - if (!line.hidden) { - var height = Math.round(curNode.offsetHeight / th) || 1; - if (line.widgetFunction) height = line.widgetFunction.size(line.text).height / textHeight(); - if (line.height != height) { - updateLineHeight(line, height); - gutterDirty = heightChanged = true; - } - } - curNode = curNode.nextSibling; - }); - if (heightChanged) - code.style.height = (doc.height * th + 2 * paddingTop()) + "px"; - } else { - if (maxWidth == null) maxWidth = stringWidth(maxLine); - if (maxWidth > scroller.clientWidth) { - lineSpace.style.width = maxWidth + "px"; - // Needed to prevent odd wrapping/hiding of widgets placed in here. - code.style.width = ""; - code.style.width = scroller.scrollWidth + "px"; - } else { - lineSpace.style.width = code.style.width = ""; + linkedDocs(doc, function(doc, sharedHist) { + if (!sharedHist && indexOf(rebased, doc.history) == -1) { + rebaseHist(doc.history, change); + rebased.push(doc.history); } - } - gutter.style.display = gutterDisplay; - if (different || gutterDirty) updateGutter(); - updateSelection(); - if (!suppressCallback && options.onUpdate) options.onUpdate(instance); - return true; - } - - function computeIntact(intact, changes) { - for (var i = 0, l = changes.length || 0; i < l; ++i) { - var change = changes[i], intact2 = [], diff = change.diff || 0; - for (var j = 0, l2 = intact.length; j < l2; ++j) { - var range = intact[j]; - if (change.to <= range.from && change.diff) - intact2.push({from: range.from + diff, to: range.to + diff, - domStart: range.domStart}); - else if (change.to <= range.from || change.from >= range.to) - intact2.push(range); - else { - if (change.from > range.from) - intact2.push({from: range.from, to: change.from, domStart: range.domStart}); - if (change.to < range.to) - intact2.push({from: change.to + diff, to: range.to + diff, - domStart: range.domStart + (change.to - range.from)}); - } - } - intact = intact2; - } - return intact; - } - - function patchDisplay(from, to, intact) { - // The first pass removes the DOM nodes that aren't intact. - if (!intact.length) lineDiv.innerHTML = ""; - else { - function killNode(node) { - var tmp = node.nextSibling; - node.parentNode.removeChild(node); - return tmp; - } - var domPos = 0, curNode = lineDiv.firstChild, n; - for (var i = 0; i < intact.length; ++i) { - var cur = intact[i]; - while (cur.domStart > domPos) {curNode = killNode(curNode); domPos++;} - for (var j = 0, e = cur.to - cur.from; j < e; ++j) {curNode = curNode.nextSibling; domPos++;} - } - while (curNode) curNode = killNode(curNode); - } - // This pass fills in the lines that actually changed. - var nextIntact = intact.shift(), curNode = lineDiv.firstChild, j = from; - var scratch = document.createElement("div"); - doc.iter(from, to, function(line) { - if (nextIntact && nextIntact.to == j) nextIntact = intact.shift(); - if (!nextIntact || nextIntact.from > j) { - if (line.hidden) var html = scratch.innerHTML = "
";
-          else {
-            var html = line.getHTML(makeTab);
-            if (!line.widgetFunction) {
-              html = '' + html + '';
-            }
-            // Kludge to make sure the styled element lies behind the selection (by z-index)
-            if (line.bgClassName)
-              html = '
 
' + html + "
";
-          }
-          scratch.innerHTML = html;
-          var insertChild = scratch.firstChild;
-          lineDiv.insertBefore(insertChild, curNode);
-          line.nodeAdded(insertChild);
-        } else {
-          curNode = curNode.nextSibling;
-        }
-        ++j;
+        makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change));
       });
     }
+  }
 
-    function updateGutter() {
-      if (!options.gutter && !options.lineNumbers) return;
-      var hText = mover.offsetHeight, hEditor = scroller.clientHeight;
-      gutter.style.height = (hText - hEditor < 2 ? hEditor : hText) + "px";
-      var html = [], i = showingFrom, normalNode;
-      doc.iter(showingFrom, Math.max(showingTo, showingFrom + 1), function(line) {
-        if (line.hidden) {
-          html.push("
");
-        } else {
-          var marker = line.gutterMarker;
-          var text = options.lineNumbers ? i + options.firstLineNumber : null;
-          if (marker && marker.text)
-            text = marker.text.replace("%N%", text != null ? text : "");
-          else if (text == null)
-            text = "\u00a0";
-          html.push((marker && marker.style ? '
' : "
"), text);
-          for (var j = 1; j < line.height; ++j) html.push("
 ");
-          html.push("
");
-          if (!marker) normalNode = i;
-        }
-        ++i;
-      });
-      gutter.style.display = "none";
-      gutterText.innerHTML = html.join("");
-      // Make sure scrolling doesn't cause number gutter size to pop
-      if (normalNode != null) {
-        var node = gutterText.childNodes[normalNode - showingFrom];
-        var minwidth = String(doc.size).length, val = eltText(node), pad = "";
-        while (val.length + pad.length < minwidth) pad += "\u00a0";
-        if (pad) node.insertBefore(document.createTextNode(pad), node.firstChild);
-      }
-      gutter.style.display = "";
-      lineSpace.style.marginLeft = gutter.offsetWidth + "px";
-      gutterDirty = false;
+  function shiftDoc(doc, distance) {
+    function shiftPos(pos) {return Pos(pos.line + distance, pos.ch);}
+    doc.first += distance;
+    if (doc.cm) regChange(doc.cm, doc.first, doc.first, distance);
+    doc.sel.head = shiftPos(doc.sel.head); doc.sel.anchor = shiftPos(doc.sel.anchor);
+    doc.sel.from = shiftPos(doc.sel.from); doc.sel.to = shiftPos(doc.sel.to);
+  }
+
+  function makeChangeSingleDoc(doc, change, selAfter, spans) {
+    if (doc.cm && !doc.cm.curOp)
+      return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans);
+
+    if (change.to.line < doc.first) {
+      shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line));
+      return;
     }
-    function updateSelection() {
-      var collapsed = posEq(sel.from, sel.to);
-      var fromPos = localCoords(sel.from, true);
-      var toPos = collapsed ? fromPos : localCoords(sel.to, true);
-      var headPos = sel.inverted ? fromPos : toPos, th = textHeight();
-      var wrapOff = eltOffset(wrapper), lineOff = eltOffset(lineDiv);
-      inputDiv.style.top = Math.max(0, Math.min(scroller.offsetHeight, headPos.y + lineOff.top - wrapOff.top)) + "px";
-      inputDiv.style.left = Math.max(0, Math.min(scroller.offsetWidth, headPos.x + lineOff.left - wrapOff.left)) + "px";
-      if (collapsed) {
-        cursor.style.top = headPos.y + "px";
-        cursor.style.left = (options.lineWrapping ? Math.min(headPos.x, lineSpace.offsetWidth) : headPos.x) + "px";
-        cursor.style.display = "";
-        selectionDiv.style.display = "none";
-      } else {
-        var sameLine = fromPos.y == toPos.y, html = "";
-        function add(left, top, right, height) {
-          html += '
';
-        }
-        var clientWidth = lineSpace.clientWidth || lineSpace.offsetWidth;
-        var clientHeight = lineSpace.clientHeight || lineSpace.offsetHeight;
-        if (sel.from.ch && fromPos.y >= 0) {
-          var right = sameLine ? clientWidth - toPos.x : 0;
-          add(fromPos.x, fromPos.y, right, th);
-        }
-        var middleStart = Math.max(0, fromPos.y + (sel.from.ch ? th : 0));
-        var middleHeight = Math.min(toPos.y, clientHeight) - middleStart;
-        if (middleHeight > 0.2 * th)
-          add(0, middleStart, 0, middleHeight);
-        if ((!sameLine || !sel.from.ch) && toPos.y < clientHeight - .5 * th)
-          add(0, toPos.y, clientWidth - toPos.x, th);
-        selectionDiv.innerHTML = html;
-        cursor.style.display = "none";
-        selectionDiv.style.display = "";
-      }
+    if (change.from.line > doc.lastLine()) return;
+
+    // Clip the change to the size of this doc
+    if (change.from.line < doc.first) {
+      var shift = change.text.length - 1 - (doc.first - change.from.line);
+      shiftDoc(doc, shift);
+      change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change.to.ch),
+                text: [lst(change.text)], origin: change.origin};
+    }
+    var last = doc.lastLine();
+    if (change.to.line > last) {
+      change = {from: change.from, to: Pos(last, getLine(doc, last).text.length),
+                text: [change.text[0]], origin: change.origin};
     }
 
-    function setShift(val) {
-      if (val) shiftSelecting = shiftSelecting || (sel.inverted ? sel.to : sel.from);
-      else shiftSelecting = null;
-    }
-    function setSelectionUser(from, to) {
-      var sh = shiftSelecting && clipPos(shiftSelecting);
-      if (sh) {
-        if (posLess(sh, from)) from = sh;
-        else if (posLess(to, sh)) to = sh;
-      }
-      setSelection(from, to);
-      userSelChange = true;
-    }
-    // Update the selection. Last two args are only used by
-    // updateLines, since they have to be expressed in the line
-    // numbers before the update.
-    function setSelection(from, to, oldFrom, oldTo) {
-      goalColumn = null;
-      if (oldFrom == null) {oldFrom = sel.from.line; oldTo = sel.to.line;}
-      if (posEq(sel.from, from) && posEq(sel.to, to)) return;
-      if (posLess(to, from)) {var tmp = to; to = from; from = tmp;}
+    change.removed = getBetween(doc, change.from, change.to);
 
-      // Skip over hidden lines.
-      if (from.line != oldFrom) {
-        var from1 = skipHidden(from, oldFrom, sel.from.ch);
-        // If there is no non-hidden line left, force visibility on current line
-        if (!from1) setLineHidden(from.line, false);
-        else from = from1;
-      }
-      if (to.line != oldTo) to = skipHidden(to, oldTo, sel.to.ch);
+    if (!selAfter) selAfter = computeSelAfterChange(doc, change, null);
+    if (doc.cm) makeChangeSingleDocInEditor(doc.cm, change, spans, selAfter);
+    else updateDoc(doc, change, spans, selAfter);
+  }
 
-      if (posEq(from, to)) sel.inverted = false;
-      else if (posEq(from, sel.to)) sel.inverted = false;
-      else if (posEq(to, sel.from)) sel.inverted = true;
+  function makeChangeSingleDocInEditor(cm, change, spans, selAfter) {
+    var doc = cm.doc, display = cm.display, from = change.from, to = change.to;
 
-      if (options.autoClearEmptyLines && posEq(sel.from, sel.to)) {
-        var head = sel.inverted ? from : to;
-        if (head.line != sel.from.line && sel.from.line < doc.size) {
-          var oldLine = getLine(sel.from.line);
-          if (/^\s+$/.test(oldLine.text))
-            setTimeout(operation(function() {
-              if (oldLine.parent && /^\s+$/.test(oldLine.text)) {
-                var no = lineNo(oldLine);
-                replaceRange("", {line: no, ch: 0}, {line: no, ch: oldLine.text.length});
-              }
-            }, 10));
-        }
-      }
-
-      sel.from = from; sel.to = to;
-      selectionChanged = true;
-    }
-    function skipHidden(pos, oldLine, oldCh) {
-      function getNonHidden(dir) {
-        var lNo = pos.line + dir, end = dir == 1 ? doc.size : -1;
-        while (lNo != end) {
-          var line = getLine(lNo);
-          if (!line.hidden) {
-            var ch = pos.ch;
-            if (ch > oldCh || ch > line.text.length) ch = line.text.length;
-            return {line: lNo, ch: ch};
-          }
-          lNo += dir;
-        }
-      }
-      var line = getLine(pos.line);
-      if (!line.hidden) return pos;
-      if (pos.line >= oldLine) return getNonHidden(1) || getNonHidden(-1);
-      else return getNonHidden(-1) || getNonHidden(1);
-    }
-    function setCursor(line, ch, user) {
-      var pos = clipPos({line: line, ch: ch || 0});
-      (user ? setSelectionUser : setSelection)(pos, pos);
-    }
-
-    function clipLine(n) {return Math.max(0, Math.min(n, doc.size-1));}
-    function clipPos(pos) {
-      if (pos.line < 0) return {line: 0, ch: 0};
-      if (pos.line >= doc.size) return {line: doc.size-1, ch: getLine(doc.size-1).text.length};
-      var ch = pos.ch, line = getLine(pos.line), linelen =line.text.length;
-      if (line.widgetFunction && ch != 0) return {line: pos.line, ch: linelen};
-      if (ch == null || ch > linelen) return {line: pos.line, ch: linelen};
-      else if (ch < 0) return {line: pos.line, ch: 0};
-      else return pos;
-    }
-
-    function findPosH(dir, unit) {
-      var end = sel.inverted ? sel.from : sel.to, line = end.line, ch = end.ch;
-      var lineObj = getLine(line);
-      function findNextLine() {
-        for (var l = line + dir, e = dir < 0 ? -1 : doc.size; l != e; l += dir) {
-          var lo = getLine(l);
-          if (!lo.hidden) { line = l; lineObj = lo; return true; }
-        }
-      }
-      function moveOnce(boundToLine) {
-        if (ch == (dir < 0 ? 0 : lineObj.text.length)) {
-          if (!boundToLine && findNextLine()) ch = dir < 0 ? lineObj.text.length : 0;
-          else return false;
-        } else if (lineObj.widgetFunction) { //Select the entire line
-          ch = dir < 0 ? 0 : lineObj.text.length;
-        } else ch += dir;
-        return true;
-      }
-      if (unit == "char") moveOnce();
-      else if (unit == "column") moveOnce(true);
-      else if (unit == "word") {
-        var sawWord = false;
-        for (;;) {
-          if (dir < 0) if (!moveOnce()) break;
-          if (isWordChar(lineObj.text.charAt(ch))) sawWord = true;
-          else if (sawWord) {if (dir < 0) {dir = 1; moveOnce();} break;}
-          if (dir > 0) if (!moveOnce()) break;
-        }
-      }
-      return {line: line, ch: ch};
-    }
-    function moveH(dir, unit) {
-      var pos = dir < 0 ? sel.from : sel.to;
-      if (shiftSelecting || posEq(sel.from, sel.to)) pos = findPosH(dir, unit);
-      setCursor(pos.line, pos.ch, true);
-    }
-    function deleteH(dir, unit) {
-      var from = sel.from;
-      var to = sel.to;
-      if (posEq(sel.from, sel.to)) {
-        if (dir < 0) {
-          from = findPosH(dir, unit);
-          if (getLine(from.line).widgetFunction) from.ch = 0;
-        }
-        else {
-          to = findPosH(dir, unit);
-          if (getLine(to.line).widgetFunction) to.ch = getLine(to.line).text.length;
-        }
-      }
-      replaceRange("", from, to);
-      userSelChange = true;
-    }
-    var goalColumn = null;
-    function moveV(dir, unit) {
-      var dist = 0, pos = sel.inverted ? sel.from : sel.to, loc = localCoords(pos, true);
-      if (goalColumn != null) pos.x = goalColumn;
-      if (unit == "page") dist = Math.min(scroller.clientHeight, window.innerHeight || document.documentElement.clientHeight);
-      else if (unit == "line") {
-        var line = getLine(pos.line);
-        if (dir > 0 && line.widgetFunction) dist = Math.ceil(getLine(pos.line).height);
-        else dist = 1;
-        dist *= textHeight();
-      }
-      var target = coordsChar(loc.x, loc.y + dist * dir + 2);
-      if (unit == "page") scroller.scrollTop += localCoords(target, true).y - loc.y;
-      setCursor(target.line, target.ch, true);
-      goalColumn = loc.x;
-    }
-
-    function selectWordAt(pos) {
-      var line = getLine(pos.line).text;
-      var start = pos.ch, end = pos.ch;
-      while (start > 0 && isWordChar(line.charAt(start - 1))) --start;
-      while (end < line.length && isWordChar(line.charAt(end))) ++end;
-      setSelectionUser({line: pos.line, ch: start}, {line: pos.line, ch: end});
-    }
-    function selectLine(line) {
-      setSelectionUser({line: line, ch: 0}, clipPos({line: line + 1, ch: 0}));
-    }
-    function indentSelected(mode) {
-      if (posEq(sel.from, sel.to)) return indentLine(sel.from.line, mode);
-      var e = sel.to.line - (sel.to.ch ? 0 : 1);
-      for (var i = sel.from.line; i <= e; ++i) indentLine(i, mode);
-    }
-
-    function indentLine(n, how) {
-      if (!how) how = "add";
-      if (how == "smart") {
-        if (!mode.indent) how = "prev";
-        else var state = getStateBefore(n);
-      }
-
-      var line = getLine(n), curSpace = line.indentation(options.tabSize),
-          curSpaceString = line.text.match(/^\s*/)[0], indentation;
-      if (how == "prev") {
-        if (n) indentation = getLine(n-1).indentation(options.tabSize);
-        else indentation = 0;
-      }
-      else if (how == "smart") indentation = mode.indent(state, line.text.slice(curSpaceString.length), line.text);
-      else if (how == "add") indentation = curSpace + options.indentUnit;
-      else if (how == "subtract") indentation = curSpace - options.indentUnit;
-      indentation = Math.max(0, indentation);
-      var diff = indentation - curSpace;
-
-      if (!diff) {
-        if (sel.from.line != n && sel.to.line != n) return;
-        var indentString = curSpaceString;
-      }
-      else {
-        var indentString = "", pos = 0;
-        if (options.indentWithTabs)
-          for (var i = Math.floor(indentation / options.tabSize); i; --i) {pos += options.tabSize; indentString += "\t";}
-        while (pos < indentation) {++pos; indentString += " ";}
-      }
-
-      replaceRange(indentString, {line: n, ch: 0}, {line: n, ch: curSpaceString.length});
-    }
-
-    function loadMode() {
-      mode = CodeMirror.getMode(options, options.mode);
-      doc.iter(0, doc.size, function(line) { line.stateAfter = null; });
-      work = [0];
-      startWorker();
-    }
-    function gutterChanged() {
-      var visible = options.gutter || options.lineNumbers;
-      gutter.style.display = visible ? "" : "none";
-      if (visible) gutterDirty = true;
-      else lineDiv.parentNode.style.marginLeft = 0;
-    }
-    function wrappingChanged(from, to) {
-      if (options.lineWrapping) {
-        wrapper.className += " CodeMirror-wrap";
-        var perLine = scroller.clientWidth / charWidth() - 3;
-        doc.iter(0, doc.size, function(line) {
-          if (line.hidden) return;
-          var guess = Math.ceil(line.text.length / perLine) || 1;
-          if (guess != 1) updateLineHeight(line, guess);
-        });
-        lineSpace.style.width = code.style.width = "";
-      } else {
-        wrapper.className = wrapper.className.replace(" CodeMirror-wrap", "");
-        maxWidth = null; maxLine = "";
-        doc.iter(0, doc.size, function(line) {
-          if (line.height != 1 && !line.hidden && !line.widgetFunction) updateLineHeight(line, 1);
-          if (line.text.length > maxLine.length) maxLine = line.text;
-        });
-      }
-      changes.push({from: 0, to: doc.size});
-    }
-    function makeTab(col) {
-      var w = options.tabSize - col % options.tabSize, cached = tabCache[w];
-      if (cached) return cached;
-      for (var str = '', i = 0; i < w; ++i) str += " ";
-      return (tabCache[w] = {html: str + "", width: w});
-    }
-    function themeChanged() {
-      scroller.className = scroller.className.replace(/\s*cm-s-\w+/g, "") +
-        options.theme.replace(/(^|\s)\s*/g, " cm-s-");
-    }
-
-    function TextMarker() { this.set = []; }
-    TextMarker.prototype.clear = operation(function() {
-      var min = Infinity, max = -Infinity;
-      for (var i = 0, e = this.set.length; i < e; ++i) {
-        var line = this.set[i], mk = line.marked;
-        if (!mk || !line.parent) continue;
-        var lineN = lineNo(line);
-        min = Math.min(min, lineN); max = Math.max(max, lineN);
-        for (var j = 0; j < mk.length; ++j)
-          if (mk[j].marker == this) mk.splice(j--, 1);
-      }
-      if (min != Infinity)
-        changes.push({from: min, to: max + 1});
-    });
-    TextMarker.prototype.find = function() {
-      var from, to;
-      for (var i = 0, e = this.set.length; i < e; ++i) {
-        var line = this.set[i], mk = line.marked;
-        for (var j = 0; j < mk.length; ++j) {
-          var mark = mk[j];
-          if (mark.marker == this) {
-            if (mark.from != null || mark.to != null) {
-              var found = lineNo(line);
-              if (found != null) {
-                if (mark.from != null) from = {line: found, ch: mark.from};
-                if (mark.to != null) to = {line: found, ch: mark.to};
-              }
-            }
-          }
-        }
-      }
-      return {from: from, to: to};
-    };
-
-    function markText(from, to, className) {
-      from = clipPos(from); to = clipPos(to);
-      var tm = new TextMarker();
-      if (!posLess(from, to)) return tm;
-      function add(line, from, to, className) {
-        getLine(line).addMark(new MarkedText(from, to, className, tm));
-      }
-      if (from.line == to.line) add(from.line, from.ch, to.ch, className);
-      else {
-        add(from.line, from.ch, null, className);
-        for (var i = from.line + 1, e = to.line; i < e; ++i)
-          add(i, null, null, className);
-        add(to.line, null, to.ch, className);
-      }
-      changes.push({from: from.line, to: to.line + 1});
-      return tm;
-    }
-
-    function setBookmark(pos) {
-      pos = clipPos(pos);
-      var bm = new Bookmark(pos.ch);
-      getLine(pos.line).addMark(bm);
-      return bm;
-    }
-
-    function findMarksAt(pos) {
-      pos = clipPos(pos);
-      var markers = [], marked = getLine(pos.line).marked;
-      if (!marked) return markers;
-      for (var i = 0, e = marked.length; i < e; ++i) {
-        var m = marked[i];
-        if ((m.from == null || m.from <= pos.ch) &&
-            (m.to == null || m.to >= pos.ch))
-          markers.push(m.marker || m);
-      }
-      return markers;
-    }
-
-    function addGutterMarker(line, text, className) {
-      if (typeof line == "number") line = getLine(clipLine(line));
-      line.gutterMarker = {text: text, style: className};
-      gutterDirty = true;
-      return line;
-    }
-    function removeGutterMarker(line) {
-      if (typeof line == "number") line = getLine(clipLine(line));
-      line.gutterMarker = null;
-      gutterDirty = true;
-    }
-
-    function changeLine(handle, op) {
-      var no = handle, line = handle;
-      if (typeof handle == "number") line = getLine(clipLine(handle));
-      else no = lineNo(handle);
-      if (no == null) return null;
-      if (op(line, no)) changes.push({from: no, to: no + 1});
-      else return null;
-      return line;
-    }
-    function setLineClass(handle, className, bgClassName) {
-      return changeLine(handle, function(line) {
-        if (line.className != className || line.bgClassName != bgClassName) {
-          line.className = className;
-          line.bgClassName = bgClassName;
+    var recomputeMaxLength = false, checkWidthStart = from.line;
+    if (!cm.options.lineWrapping) {
+      checkWidthStart = lineNo(visualLine(doc, getLine(doc, from.line)));
+      doc.iter(checkWidthStart, to.line + 1, function(line) {
+        if (line == display.maxLine) {
+          recomputeMaxLength = true;
           return true;
         }
       });
     }
-    function setLineHidden(handle, hidden) {
-      return changeLine(handle, function(line, no) {
-        if (line.hidden != hidden) {
-          line.hidden = hidden;
-          updateLineHeight(line, hidden ? 0 : 1);
-          var fline = sel.from.line, tline = sel.to.line;
-          if (hidden && (fline == no || tline == no)) {
-            var from = fline == no ? skipHidden({line: fline, ch: 0}, fline, 0) : sel.from;
-            var to = tline == no ? skipHidden({line: tline, ch: 0}, tline, 0) : sel.to;
-            // Can't hide the last visible line, we'd have no place to put the cursor
-            if (!to) return;
-            setSelection(from, to);
-          }
-          return (gutterDirty = true);
+
+    if (!posLess(doc.sel.head, change.from) && !posLess(change.to, doc.sel.head))
+      cm.curOp.cursorActivity = true;
+
+    updateDoc(doc, change, spans, selAfter, estimateHeight(cm));
+
+    if (!cm.options.lineWrapping) {
+      doc.iter(checkWidthStart, from.line + change.text.length, function(line) {
+        var len = lineLength(doc, line);
+        if (len > display.maxLineLength) {
+          display.maxLine = line;
+          display.maxLineLength = len;
+          display.maxLineChanged = true;
+          recomputeMaxLength = false;
         }
       });
+      if (recomputeMaxLength) cm.curOp.updateMaxLine = true;
     }
 
-    function lineInfo(line) {
-      if (typeof line == "number") {
-        if (!isLine(line)) return null;
-        var n = line;
-        line = getLine(line);
-        if (!line) return null;
+    // Adjust frontier, schedule worker
+    doc.frontier = Math.min(doc.frontier, from.line);
+    startWorker(cm, 400);
+
+    var lendiff = change.text.length - (to.line - from.line) - 1;
+    // Remember that these lines changed, for updating the display
+    regChange(cm, from.line, to.line + 1, lendiff);
+
+    if (hasHandler(cm, "change")) {
+      var changeObj = {from: from, to: to,
+                       text: change.text,
+                       removed: change.removed,
+                       origin: change.origin};
+      if (cm.curOp.textChanged) {
+        for (var cur = cm.curOp.textChanged; cur.next; cur = cur.next) {}
+        cur.next = changeObj;
+      } else cm.curOp.textChanged = changeObj;
+    }
+  }
+
+  function replaceRange(doc, code, from, to, origin) {
+    if (!to) to = from;
+    if (posLess(to, from)) { var tmp = to; to = from; from = tmp; }
+    if (typeof code == "string") code = splitLines(code);
+    makeChange(doc, {from: from, to: to, text: code, origin: origin}, null);
+  }
+
+  // POSITION OBJECT
+
+  function Pos(line, ch) {
+    if (!(this instanceof Pos)) return new Pos(line, ch);
+    this.line = line; this.ch = ch;
+  }
+  CodeMirror.Pos = Pos;
+
+  function posEq(a, b) {return a.line == b.line && a.ch == b.ch;}
+  function posLess(a, b) {return a.line < b.line || (a.line == b.line && a.ch < b.ch);}
+  function cmp(a, b) {return a.line - b.line || a.ch - b.ch;}
+  function copyPos(x) {return Pos(x.line, x.ch);}
+
+  // SELECTION
+
+  function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1));}
+  function clipPos(doc, pos) {
+    if (pos.line < doc.first) return Pos(doc.first, 0);
+    var last = doc.first + doc.size - 1;
+    if (pos.line > last) return Pos(last, getLine(doc, last).text.length);
+    return clipToLen(pos, getLine(doc, pos.line).text.length);
+  }
+  function clipToLen(pos, linelen) {
+    var ch = pos.ch;
+    if (ch == null || ch > linelen) return Pos(pos.line, linelen);
+    else if (ch < 0) return Pos(pos.line, 0);
+    else return pos;
+  }
+  function isLine(doc, l) {return l >= doc.first && l < doc.first + doc.size;}
+
+  // If shift is held, this will move the selection anchor. Otherwise,
+  // it'll set the whole selection.
+  function extendSelection(doc, pos, other, bias) {
+    if (doc.sel.shift || doc.sel.extend) {
+      var anchor = doc.sel.anchor;
+      if (other) {
+        var posBefore = posLess(pos, anchor);
+        if (posBefore != posLess(other, anchor)) {
+          anchor = pos;
+          pos = other;
+        } else if (posBefore != posLess(pos, other)) {
+          pos = other;
+        }
       }
-      else {
+      setSelection(doc, anchor, pos, bias);
+    } else {
+      setSelection(doc, pos, other || pos, bias);
+    }
+    if (doc.cm) doc.cm.curOp.userSelChange = true;
+
+    if (doc.cm) {
+      var from = doc.sel.from;
+      var to = doc.sel.to;
+
+      if (posEq(from, to) && doc.cm.display.input.setSelectionRange) {
+        clearTimeout(doc.cm.state.accessibleTextareaTimeout);
+        doc.cm.state.accessibleTextareaWaiting = true;
+
+        doc.cm.display.input.value = doc.getLine(from.line) + "\n";
+        doc.cm.display.input.setSelectionRange(from.ch, from.ch);
+
+        doc.cm.state.accessibleTextareaTimeout = setTimeout(function() {
+          clearAccessibleTextarea(doc.cm);
+        }, 80);
+      }
+    }
+  }
+
+  function clearAccessibleTextarea(cm) {
+    clearTimeout(cm.state.accessibleTextareaTimeout);
+    cm.state.accessibleTextareaWaiting = false;
+    resetInput(cm, true);
+  }
+
+  function filterSelectionChange(doc, anchor, head) {
+    var obj = {anchor: anchor, head: head};
+    signal(doc, "beforeSelectionChange", doc, obj);
+    if (doc.cm) signal(doc.cm, "beforeSelectionChange", doc.cm, obj);
+    obj.anchor = clipPos(doc, obj.anchor); obj.head = clipPos(doc, obj.head);
+    return obj;
+  }
+
+  // Update the selection. Last two args are only used by
+  // updateDoc, since they have to be expressed in the line
+  // numbers before the update.
+  function setSelection(doc, anchor, head, bias, checkAtomic) {
+    if (!checkAtomic && hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange")) {
+      var filtered = filterSelectionChange(doc, anchor, head);
+      head = filtered.head;
+      anchor = filtered.anchor;
+    }
+
+    var sel = doc.sel;
+    sel.goalColumn = null;
+    if (bias == null) bias = posLess(head, sel.head) ? -1 : 1;
+    // Skip over atomic spans.
+    if (checkAtomic || !posEq(anchor, sel.anchor))
+      anchor = skipAtomic(doc, anchor, bias, checkAtomic != "push");
+    if (checkAtomic || !posEq(head, sel.head))
+      head = skipAtomic(doc, head, bias, checkAtomic != "push");
+
+    if (posEq(sel.anchor, anchor) && posEq(sel.head, head)) return;
+
+    sel.anchor = anchor; sel.head = head;
+    var inv = posLess(head, anchor);
+    sel.from = inv ? head : anchor;
+    sel.to = inv ? anchor : head;
+
+    if (doc.cm)
+      doc.cm.curOp.updateInput = doc.cm.curOp.selectionChanged =
+        doc.cm.curOp.cursorActivity = true;
+
+    signalLater(doc, "cursorActivity", doc);
+  }
+
+  function reCheckSelection(cm) {
+    setSelection(cm.doc, cm.doc.sel.from, cm.doc.sel.to, null, "push");
+  }
+
+  function skipAtomic(doc, pos, bias, mayClear) {
+    var flipped = false, curPos = pos;
+    var dir = bias || 1;
+    doc.cantEdit = false;
+    search: for (;;) {
+      var line = getLine(doc, curPos.line);
+      if (line.markedSpans) {
+        for (var i = 0; i < line.markedSpans.length; ++i) {
+          var sp = line.markedSpans[i], m = sp.marker;
+          if ((sp.from == null || (m.inclusiveLeft ? sp.from <= curPos.ch : sp.from < curPos.ch)) &&
+              (sp.to == null || (m.inclusiveRight ? sp.to >= curPos.ch : sp.to > curPos.ch))) {
+            if (mayClear) {
+              signal(m, "beforeCursorEnter");
+              if (m.explicitlyCleared) {
+                if (!line.markedSpans) break;
+                else {--i; continue;}
+              }
+            }
+            if (!m.atomic) continue;
+            var newPos = m.find()[dir < 0 ? "from" : "to"];
+            if (posEq(newPos, curPos)) {
+              newPos.ch += dir;
+              if (newPos.ch < 0) {
+                if (newPos.line > doc.first) newPos = clipPos(doc, Pos(newPos.line - 1));
+                else newPos = null;
+              } else if (newPos.ch > line.text.length) {
+                if (newPos.line < doc.first + doc.size - 1) newPos = Pos(newPos.line + 1, 0);
+                else newPos = null;
+              }
+              if (!newPos) {
+                if (flipped) {
+                  // Driven in a corner -- no valid cursor position found at all
+                  // -- try again *with* clearing, if we didn't already
+                  if (!mayClear) return skipAtomic(doc, pos, bias, true);
+                  // Otherwise, turn off editing until further notice, and return the start of the doc
+                  doc.cantEdit = true;
+                  return Pos(doc.first, 0);
+                }
+                flipped = true; newPos = pos; dir = -dir;
+              }
+            }
+            curPos = newPos;
+            continue search;
+          }
+        }
+      }
+      return curPos;
+    }
+  }
+
+  // SCROLLING
+
+  function scrollCursorIntoView(cm) {
+    var coords = scrollPosIntoView(cm, cm.doc.sel.head, null, cm.options.cursorScrollMargin);
+    if (!cm.state.focused) return;
+    var display = cm.display, box = getRect(display.sizer), doScroll = null;
+    if (coords.top + box.top < 0) doScroll = true;
+    else if (coords.bottom + box.top > (window.innerHeight || document.documentElement.clientHeight)) doScroll = false;
+    if (doScroll != null && !phantom) {
+      var scrollNode = elt("div", "\u200b", null, "position: absolute; top: " +
+                           (coords.top - display.viewOffset) + "px; height: " +
+                           (coords.bottom - coords.top + scrollerCutOff) + "px; left: " +
+                           coords.left + "px; width: 2px;");
+      cm.display.lineSpace.appendChild(scrollNode);
+      scrollNode.scrollIntoView(doScroll);
+      cm.display.lineSpace.removeChild(scrollNode);
+    }
+  }
+
+  function scrollPosIntoView(cm, pos, end, margin) {
+    if (margin == null) margin = 0;
+    for (;;) {
+      var changed = false, coords = cursorCoords(cm, pos);
+      var endCoords = !end || end == pos ? coords : cursorCoords(cm, end);
+      var scrollPos = calculateScrollPos(cm, Math.min(coords.left, endCoords.left),
+                                         Math.min(coords.top, endCoords.top) - margin,
+                                         Math.max(coords.left, endCoords.left),
+                                         Math.max(coords.bottom, endCoords.bottom) + margin);
+      var startTop = cm.doc.scrollTop, startLeft = cm.doc.scrollLeft;
+      if (scrollPos.scrollTop != null) {
+        setScrollTop(cm, scrollPos.scrollTop);
+        if (Math.abs(cm.doc.scrollTop - startTop) > 1) changed = true;
+      }
+      if (scrollPos.scrollLeft != null) {
+        setScrollLeft(cm, scrollPos.scrollLeft);
+        if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) changed = true;
+      }
+      if (!changed) return coords;
+    }
+  }
+
+  function scrollIntoView(cm, x1, y1, x2, y2) {
+    var scrollPos = calculateScrollPos(cm, x1, y1, x2, y2);
+    if (scrollPos.scrollTop != null) setScrollTop(cm, scrollPos.scrollTop);
+    if (scrollPos.scrollLeft != null) setScrollLeft(cm, scrollPos.scrollLeft);
+  }
+
+  function calculateScrollPos(cm, x1, y1, x2, y2) {
+    var display = cm.display, snapMargin = textHeight(cm.display);
+    if (y1 < 0) y1 = 0;
+    var screen = display.scroller.clientHeight - scrollerCutOff, screentop = display.scroller.scrollTop, result = {};
+    var docBottom = cm.doc.height + paddingVert(display);
+    var atTop = y1 < snapMargin, atBottom = y2 > docBottom - snapMargin;
+    if (y1 < screentop) {
+      result.scrollTop = atTop ? 0 : y1;
+    } else if (y2 > screentop + screen) {
+      var newTop = Math.min(y1, (atBottom ? docBottom : y2) - screen);
+      if (newTop != screentop) result.scrollTop = newTop;
+    }
+
+    var screenw = display.scroller.clientWidth - scrollerCutOff, screenleft = display.scroller.scrollLeft;
+    x1 += display.gutters.offsetWidth; x2 += display.gutters.offsetWidth;
+    var gutterw = display.gutters.offsetWidth;
+    var atLeft = x1 < gutterw + 10;
+    if (x1 < screenleft + gutterw || atLeft) {
+      if (atLeft) x1 = 0;
+      result.scrollLeft = Math.max(0, x1 - 10 - gutterw);
+    } else if (x2 > screenw + screenleft - 3) {
+      result.scrollLeft = x2 + 10 - screenw;
+    }
+    return result;
+  }
+
+  function updateScrollPos(cm, left, top) {
+    cm.curOp.updateScrollPos = {scrollLeft: left == null ? cm.doc.scrollLeft : left,
+                                scrollTop: top == null ? cm.doc.scrollTop : top};
+  }
+
+  function addToScrollPos(cm, left, top) {
+    var pos = cm.curOp.updateScrollPos || (cm.curOp.updateScrollPos = {scrollLeft: cm.doc.scrollLeft, scrollTop: cm.doc.scrollTop});
+    var scroll = cm.display.scroller;
+    pos.scrollTop = Math.max(0, Math.min(scroll.scrollHeight - scroll.clientHeight, pos.scrollTop + top));
+    pos.scrollLeft = Math.max(0, Math.min(scroll.scrollWidth - scroll.clientWidth, pos.scrollLeft + left));
+  }
+
+  // API UTILITIES
+
+  function indentLine(cm, n, how, aggressive) {
+    var doc = cm.doc;
+    if (how == null) how = "add";
+    if (how == "smart") {
+      if (!cm.doc.mode.indent) how = "prev";
+      else var state = getStateBefore(cm, n);
+    }
+
+    var tabSize = cm.options.tabSize;
+    var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize);
+    var curSpaceString = line.text.match(/^\s*/)[0], indentation;
+    if (!aggressive && !/\S/.test(line.text)) {
+      indentation = 0;
+      how = "not";
+    } else if (how == "smart") {
+      indentation = cm.doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text);
+      if (indentation == Pass) {
+        if (!aggressive) return;
+        how = "prev";
+      }
+    }
+    if (how == "prev") {
+      if (n > doc.first) indentation = countColumn(getLine(doc, n-1).text, null, tabSize);
+      else indentation = 0;
+    } else if (how == "add") {
+      indentation = curSpace + cm.options.indentUnit;
+    } else if (how == "subtract") {
+      indentation = curSpace - cm.options.indentUnit;
+    } else if (typeof how == "number") {
+      indentation = curSpace + how;
+    }
+    indentation = Math.max(0, indentation);
+
+    var indentString = "", pos = 0;
+    if (cm.options.indentWithTabs)
+      for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t";}
+    if (pos < indentation) indentString += spaceStr(indentation - pos);
+
+    if (indentString != curSpaceString)
+      replaceRange(cm.doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input");
+    else if (doc.sel.head.line == n && doc.sel.head.ch < curSpaceString.length)
+      setSelection(doc, Pos(n, curSpaceString.length), Pos(n, curSpaceString.length), 1);
+    line.stateAfter = null;
+  }
+
+  function changeLine(cm, handle, op) {
+    var no = handle, line = handle, doc = cm.doc;
+    if (typeof handle == "number") line = getLine(doc, clipLine(doc, handle));
+    else no = lineNo(handle);
+    if (no == null) return null;
+    if (op(line, no)) regChange(cm, no, no + 1);
+    else return null;
+    return line;
+  }
+
+  function findPosH(doc, pos, dir, unit, visually) {
+    var line = pos.line, ch = pos.ch, origDir = dir;
+    var lineObj = getLine(doc, line);
+    var possible = true;
+    function findNextLine() {
+      var l = line + dir;
+      if (l < doc.first || l >= doc.first + doc.size) return (possible = false);
+      line = l;
+      return lineObj = getLine(doc, l);
+    }
+    function moveOnce(boundToLine) {
+      var next = (visually ? moveVisually : moveLogically)(lineObj, ch, dir, true);
+      if (next == null) {
+        if (!boundToLine && findNextLine()) {
+          if (visually) ch = (dir < 0 ? lineRight : lineLeft)(lineObj);
+          else ch = dir < 0 ? lineObj.text.length : 0;
+        } else return (possible = false);
+      } else ch = next;
+      return true;
+    }
+
+    if (unit == "char") moveOnce();
+    else if (unit == "column") moveOnce(true);
+    else if (unit == "word" || unit == "group") {
+      var sawType = null, group = unit == "group";
+      for (var first = true;; first = false) {
+        if (dir < 0 && !moveOnce(!first)) break;
+        var cur = lineObj.text.charAt(ch) || "\n";
+        var type = isWordChar(cur) ? "w"
+          : !group ? null
+          : /\s/.test(cur) ? null
+          : "p";
+        if (sawType && sawType != type) {
+          if (dir < 0) {dir = 1; moveOnce();}
+          break;
+        }
+        if (type) sawType = type;
+        if (dir > 0 && !moveOnce(!first)) break;
+      }
+    }
+    var result = skipAtomic(doc, Pos(line, ch), origDir, true);
+    if (!possible) result.hitSide = true;
+    return result;
+  }
+
+  function findPosV(cm, pos, dir, unit) {
+    var doc = cm.doc, x = pos.left, y;
+    if (unit == "page") {
+      var pageSize = Math.min(cm.display.wrapper.clientHeight, window.innerHeight || document.documentElement.clientHeight);
+      y = pos.top + dir * (pageSize - (dir < 0 ? 1.5 : .5) * textHeight(cm.display));
+    } else if (unit == "line") {
+      y = dir > 0 ? pos.bottom + 3 : pos.top - 3;
+    }
+    for (;;) {
+      var target = coordsChar(cm, x, y);
+      if (!target.outside) break;
+      if (dir < 0 ? y <= 0 : y >= doc.height) { target.hitSide = true; break; }
+      y += dir * 5;
+    }
+    return target;
+  }
+
+  function findWordAt(line, pos) {
+    var start = pos.ch, end = pos.ch;
+    if (line) {
+      if ((pos.xRel < 0 || end == line.length) && start) --start; else ++end;
+      var startChar = line.charAt(start);
+      var check = isWordChar(startChar) ? isWordChar
+        : /\s/.test(startChar) ? function(ch) {return /\s/.test(ch);}
+        : function(ch) {return !/\s/.test(ch) && !isWordChar(ch);};
+      while (start > 0 && check(line.charAt(start - 1))) --start;
+      while (end < line.length && check(line.charAt(end))) ++end;
+    }
+    return {from: Pos(pos.line, start), to: Pos(pos.line, end)};
+  }
+
+  function selectLine(cm, line) {
+    extendSelection(cm.doc, Pos(line, 0), clipPos(cm.doc, Pos(line + 1, 0)));
+  }
+
+  // PROTOTYPE
+
+  // The publicly visible API. Note that operation(null, f) means
+  // 'wrap f in an operation, performed on its `this` parameter'
+
+  CodeMirror.prototype = {
+    constructor: CodeMirror,
+    focus: function(){window.focus(); focusInput(this); fastPoll(this);},
+
+    setOption: function(option, value) {
+      var options = this.options, old = options[option];
+      if (options[option] == value && option != "mode") return;
+      options[option] = value;
+      if (optionHandlers.hasOwnProperty(option))
+        operation(this, optionHandlers[option])(this, value, old);
+    },
+
+    getOption: function(option) {return this.options[option];},
+    getDoc: function() {return this.doc;},
+
+    addKeyMap: function(map, bottom) {
+      this.state.keyMaps[bottom ? "push" : "unshift"](map);
+    },
+    removeKeyMap: function(map) {
+      var maps = this.state.keyMaps;
+      for (var i = 0; i < maps.length; ++i)
+        if (maps[i] == map || (typeof maps[i] != "string" && maps[i].name == map)) {
+          maps.splice(i, 1);
+          return true;
+        }
+    },
+
+    addOverlay: operation(null, function(spec, options) {
+      var mode = spec.token ? spec : CodeMirror.getMode(this.options, spec);
+      if (mode.startState) throw new Error("Overlays may not be stateful.");
+      this.state.overlays.push({mode: mode, modeSpec: spec, opaque: options && options.opaque});
+      this.state.modeGen++;
+      regChange(this);
+    }),
+    removeOverlay: operation(null, function(spec) {
+      var overlays = this.state.overlays;
+      for (var i = 0; i < overlays.length; ++i) {
+        var cur = overlays[i].modeSpec;
+        if (cur == spec || typeof spec == "string" && cur.name == spec) {
+          overlays.splice(i, 1);
+          this.state.modeGen++;
+          regChange(this);
+          return;
+        }
+      }
+    }),
+
+    indentLine: operation(null, function(n, dir, aggressive) {
+      if (typeof dir != "string" && typeof dir != "number") {
+        if (dir == null) dir = this.options.smartIndent ? "smart" : "prev";
+        else dir = dir ? "add" : "subtract";
+      }
+      if (isLine(this.doc, n)) indentLine(this, n, dir, aggressive);
+    }),
+    indentSelection: operation(null, function(how) {
+      var sel = this.doc.sel;
+      if (posEq(sel.from, sel.to)) return indentLine(this, sel.from.line, how, true);
+      var e = sel.to.line - (sel.to.ch ? 0 : 1);
+      for (var i = sel.from.line; i <= e; ++i) indentLine(this, i, how);
+    }),
+
+    // Fetch the parser token for a given character. Useful for hacks
+    // that want to inspect the mode state (say, for completion).
+    getTokenAt: function(pos, precise) {
+      var doc = this.doc;
+      pos = clipPos(doc, pos);
+      var state = getStateBefore(this, pos.line, precise), mode = this.doc.mode;
+      var line = getLine(doc, pos.line);
+      var stream = new StringStream(line.text, this.options.tabSize);
+      while (stream.pos < pos.ch && !stream.eol()) {
+        stream.start = stream.pos;
+        var style = mode.token(stream, state);
+      }
+      return {start: stream.start,
+              end: stream.pos,
+              string: stream.current(),
+              className: style || null, // Deprecated, use 'type' instead
+              type: style || null,
+              state: state};
+    },
+
+    getTokenTypeAt: function(pos) {
+      pos = clipPos(this.doc, pos);
+      var styles = getLineStyles(this, getLine(this.doc, pos.line));
+      var before = 0, after = (styles.length - 1) / 2, ch = pos.ch;
+      if (ch == 0) return styles[2];
+      for (;;) {
+        var mid = (before + after) >> 1;
+        if ((mid ? styles[mid * 2 - 1] : 0) >= ch) after = mid;
+        else if (styles[mid * 2 + 1] < ch) before = mid + 1;
+        else return styles[mid * 2 + 2];
+      }
+    },
+
+    getModeAt: function(pos) {
+      var mode = this.doc.mode;
+      if (!mode.innerMode) return mode;
+      return CodeMirror.innerMode(mode, this.getTokenAt(pos).state).mode;
+    },
+
+    getHelper: function(pos, type) {
+      return this.getHelpers(pos, type)[0];
+    },
+
+    getHelpers: function(pos, type) {
+      var found = [];
+      if (!helpers.hasOwnProperty(type)) return helpers;
+      var help = helpers[type], mode = this.getModeAt(pos);
+      if (typeof mode[type] == "string") {
+        if (help[mode[type]]) found.push(help[mode[type]]);
+      } else if (mode[type]) {
+        for (var i = 0; i < mode[type].length; i++) {
+          var val = help[mode[type][i]];
+          if (val) found.push(val);
+        }
+      } else if (mode.helperType && help[mode.helperType]) {
+        found.push(help[mode.helperType]);
+      } else if (help[mode.name]) {
+        found.push(help[mode.name]);
+      }
+      for (var i = 0; i < help._global.length; i++) {
+        var cur = help._global[i];
+        if (cur.pred(mode, this) && indexOf(found, cur.val) == -1)
+          found.push(cur.val);
+      }
+      return found;
+    },
+
+    getStateAfter: function(line, precise) {
+      var doc = this.doc;
+      line = clipLine(doc, line == null ? doc.first + doc.size - 1: line);
+      return getStateBefore(this, line + 1, precise);
+    },
+
+    cursorCoords: function(start, mode) {
+      var pos, sel = this.doc.sel;
+      if (start == null) pos = sel.head;
+      else if (typeof start == "object") pos = clipPos(this.doc, start);
+      else pos = start ? sel.from : sel.to;
+      return cursorCoords(this, pos, mode || "page");
+    },
+
+    charCoords: function(pos, mode) {
+      return charCoords(this, clipPos(this.doc, pos), mode || "page");
+    },
+
+    coordsChar: function(coords, mode) {
+      coords = fromCoordSystem(this, coords, mode || "page");
+      return coordsChar(this, coords.left, coords.top);
+    },
+
+    lineAtHeight: function(height, mode) {
+      height = fromCoordSystem(this, {top: height, left: 0}, mode || "page").top;
+      return lineAtHeight(this.doc, height + this.display.viewOffset);
+    },
+    heightAtLine: function(line, mode) {
+      var end = false, last = this.doc.first + this.doc.size - 1;
+      if (line < this.doc.first) line = this.doc.first;
+      else if (line > last) { line = last; end = true; }
+      var lineObj = getLine(this.doc, line);
+      return intoCoordSystem(this, getLine(this.doc, line), {top: 0, left: 0}, mode || "page").top +
+        (end ? lineObj.height : 0);
+    },
+
+    defaultTextHeight: function() { return textHeight(this.display); },
+    defaultCharWidth: function() { return charWidth(this.display); },
+
+    setGutterMarker: operation(null, function(line, gutterID, value) {
+      return changeLine(this, line, function(line) {
+        var markers = line.gutterMarkers || (line.gutterMarkers = {});
+        markers[gutterID] = value;
+        if (!value && isEmpty(markers)) line.gutterMarkers = null;
+        return true;
+      });
+    }),
+
+    clearGutter: operation(null, function(gutterID) {
+      var cm = this, doc = cm.doc, i = doc.first;
+      doc.iter(function(line) {
+        if (line.gutterMarkers && line.gutterMarkers[gutterID]) {
+          line.gutterMarkers[gutterID] = null;
+          regChange(cm, i, i + 1);
+          if (isEmpty(line.gutterMarkers)) line.gutterMarkers = null;
+        }
+        ++i;
+      });
+    }),
+
+    addLineClass: operation(null, function(handle, where, cls) {
+      return changeLine(this, handle, function(line) {
+        var prop = where == "text" ? "textClass" : where == "background" ? "bgClass" : "wrapClass";
+        if (!line[prop]) line[prop] = cls;
+        else if (new RegExp("(?:^|\\s)" + cls + "(?:$|\\s)").test(line[prop])) return false;
+        else line[prop] += " " + cls;
+        return true;
+      });
+    }),
+
+    removeLineClass: operation(null, function(handle, where, cls) {
+      return changeLine(this, handle, function(line) {
+        var prop = where == "text" ? "textClass" : where == "background" ? "bgClass" : "wrapClass";
+        var cur = line[prop];
+        if (!cur) return false;
+        else if (cls == null) line[prop] = null;
+        else {
+          var found = cur.match(new RegExp("(?:^|\\s+)" + cls + "(?:$|\\s+)"));
+          if (!found) return false;
+          var end = found.index + found[0].length;
+          line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.length ? "" : " ") + cur.slice(end) || null;
+        }
+        return true;
+      });
+    }),
+
+    addLineWidget: operation(null, function(handle, node, options) {
+      return addLineWidget(this, handle, node, options);
+    }),
+
+    removeLineWidget: function(widget) { widget.clear(); },
+
+    lineInfo: function(line) {
+      if (typeof line == "number") {
+        if (!isLine(this.doc, line)) return null;
+        var n = line;
+        line = getLine(this.doc, line);
+        if (!line) return null;
+      } else {
         var n = lineNo(line);
         if (n == null) return null;
       }
-      var marker = line.gutterMarker;
-      return {line: n, handle: line, text: line.text, markerText: marker && marker.text,
-              markerClass: marker && marker.style, lineClass: line.className, bgClass: line.bgClassName};
-    }
+      return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers,
+              textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass,
+              widgets: line.widgets};
+    },
 
-    function stringWidth(str) {
-      measure.innerHTML = "
x
";
-      measure.firstChild.firstChild.firstChild.nodeValue = str;
-      return measure.firstChild.firstChild.offsetWidth || 10;
-    }
-    // These are used to go from pixel positions to character
-    // positions, taking varying character widths into account.
-    function charFromX(line, x) {
-      if (x <= 0) return 0;
-      var lineObj = getLine(line), text = lineObj.text;
-      function getX(len) {
-        measure.innerHTML = "
" + lineObj.getHTML(makeTab, len) + "
";
-        return measure.firstChild.firstChild.offsetWidth;
-      }
-      var from = 0, fromX = 0, to = text.length, toX;
-      // Guess a suitable upper bound for our search.
-      var estimated = Math.min(to, Math.ceil(x / charWidth()));
-      for (;;) {
-        var estX = getX(estimated);
-        if (estX <= x && estimated < to) estimated = Math.min(to, Math.ceil(estimated * 1.2));
-        else {toX = estX; to = estimated; break;}
-      }
-      if (x > toX) return to;
-      // Try to guess a suitable lower bound as well.
-      estimated = Math.floor(to * 0.8); estX = getX(estimated);
-      if (estX < x) {from = estimated; fromX = estX;}
-      // Do a binary search between these bounds.
-      for (;;) {
-        if (to - from <= 1) return (toX - x > x - fromX) ? from : to;
-        var middle = Math.ceil((from + to) / 2), middleX = getX(middle);
-        if (middleX > x) {to = middle; toX = middleX;}
-        else {from = middle; fromX = middleX;}
-      }
-    }
+    getViewport: function() { return {from: this.display.showingFrom, to: this.display.showingTo};},
 
-    var tempId = Math.floor(Math.random() * 0xffffff).toString(16);
-    function measureLine(line, ch) {
-      if (ch == 0) return {top: 0, left: 0};
-      if (line.widgetFunction) {
-        var size = line.widgetFunction.size(line.text);
-        return {top: -1, left: size.width};
-      } 
-      var extra = "";
-      // Include extra text at the end to make sure the measured line is wrapped in the right way.
-      if (options.lineWrapping) {
-        var end = line.text.indexOf(" ", ch + 6);
-        extra = htmlEscape(line.text.slice(ch + 1, end < 0 ? line.text.length : end + (ie ? 5 : 0)));
+    addWidget: function(pos, node, scroll, vert, horiz) {
+      var display = this.display;
+      pos = cursorCoords(this, clipPos(this.doc, pos));
+      var top = pos.bottom, left = pos.left;
+      node.style.position = "absolute";
+      display.sizer.appendChild(node);
+      if (vert == "over") {
+        top = pos.top;
+      } else if (vert == "above" || vert == "near") {
+        var vspace = Math.max(display.wrapper.clientHeight, this.doc.height),
+        hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWidth);
+        // Default to positioning above (if specified and possible); otherwise default to positioning below
+        if ((vert == 'above' || pos.bottom + node.offsetHeight > vspace) && pos.top > node.offsetHeight)
+          top = pos.top - node.offsetHeight;
+        else if (pos.bottom + node.offsetHeight <= vspace)
+          top = pos.bottom;
+        if (left + node.offsetWidth > hspace)
+          left = hspace - node.offsetWidth;
       }
-      measure.innerHTML = "
" + line.getHTML(makeTab, ch) +
-        '' + htmlEscape(line.text.charAt(ch) || " ") + "" +
-        extra + "
";
-      var elt = document.getElementById("CodeMirror-temp-" + tempId);
-      var top = elt.offsetTop, left = elt.offsetLeft;
-      // Older IEs report zero offsets for spans directly after a wrap
-      if (ie && top == 0 && left == 0) {
-        var backup = document.createElement("span");
-        backup.innerHTML = "x";
-        elt.parentNode.insertBefore(backup, elt.nextSibling);
-        top = backup.offsetTop;
-      }
-      return {top: top, left: left};
-    }
-    function localCoords(pos, inLineWrap) {
-      var x, lh = textHeight(), y = lh * (heightAtLine(doc, pos.line) - (inLineWrap ? displayOffset : 0));
-      if (pos.ch == 0) x = 0;
-      else {
-        var sp = measureLine(getLine(pos.line), pos.ch);
-        x = sp.left;
-        if (options.lineWrapping) y += Math.max(0, sp.top);
-      }
-      return {x: x, y: y, yBot: y + lh};
-    }
-    // Coords must be lineSpace-local
-    function coordsChar(x, y) {
-      if (y < 0) y = 0;
-      var th = textHeight(), cw = charWidth(), heightPos = displayOffset + y / th;
-      var lineNo = lineAtHeight(doc, heightPos);
-      if (lineNo >= doc.size) return {line: doc.size - 1, ch: getLine(doc.size - 1).text.length};
-      var lineObj = getLine(lineNo), text = lineObj.text;
-      var tw = options.lineWrapping, innerOff = tw ? Math.floor(heightPos - heightAtLine(doc, lineNo)) : 0;
-      if (x <= 0 && innerOff == 0) return {line: lineNo, ch: 0};
-      function getX(len) {
-        var sp = measureLine(lineObj, len);
-        if (tw) {
-          var off = Math.round(sp.top / th);
-          return Math.max(0, sp.left + (off - innerOff) * scroller.clientWidth);
-        }
-        return sp.left;
-      }
-      var from = 0, fromX = 0, to = text.length, toX;
-      // Guess a suitable upper bound for our search.
-      var estimated = Math.min(to, Math.ceil((x + innerOff * scroller.clientWidth * .9) / cw));
-      for (;;) {
-        var estX = getX(estimated);
-        if (estX <= x && estimated < to) estimated = Math.min(to, Math.ceil(estimated * 1.2));
-        else {toX = estX; to = estimated; break;}
-      }
-      if (x > toX) return {line: lineNo, ch: to};
-      // Try to guess a suitable lower bound as well.
-      estimated = Math.floor(to * 0.8); estX = getX(estimated);
-      if (estX < x) {from = estimated; fromX = estX;}
-      // Do a binary search between these bounds.
-      for (;;) {
-        if (to - from <= 1) return {line: lineNo, ch: (toX - x > x - fromX) ? from : to};
-        var middle = Math.ceil((from + to) / 2), middleX = getX(middle);
-        if (middleX > x) {to = middle; toX = middleX;}
-        else {from = middle; fromX = middleX;}
-      }
-    }
-    function pageCoords(pos) {
-      var local = localCoords(pos, true), off = eltOffset(lineSpace);
-      return {x: off.left + local.x, y: off.top + local.y, yBot: off.top + local.yBot};
-    }
-
-    var cachedHeight, cachedHeightFor, measureText;
-    function textHeight() {
-      if (measureText == null) {
-        measureText = "
";
-        for (var i = 0; i < 49; ++i) measureText += "x
";
-        measureText += "x
";
-      }
-      var offsetHeight = lineDiv.clientHeight;
-      if (offsetHeight == cachedHeightFor) return cachedHeight;
-      cachedHeightFor = offsetHeight;
-      measure.innerHTML = measureText;
-      cachedHeight = measure.firstChild.offsetHeight / 50 || 1;
-      measure.innerHTML = "";
-      return cachedHeight;
-    }
-    var cachedWidth, cachedWidthFor = 0;
-    function charWidth() {
-      if (scroller.clientWidth == cachedWidthFor) return cachedWidth;
-      cachedWidthFor = scroller.clientWidth;
-      return (cachedWidth = stringWidth("x"));
-    }
-    function paddingTop() {return lineSpace.offsetTop;}
-    function paddingLeft() {return lineSpace.offsetLeft;}
-
-    function posFromMouse(e, liberal) {
-      var offW = eltOffset(scroller, true), x, y;
-      // Fails unpredictably on IE[67] when mouse is dragged around quickly.
-      try { x = e.clientX; y = e.clientY; } catch (e) { return null; }
-      // This is a mess of a heuristic to try and determine whether a
-      // scroll-bar was clicked or not, and to return null if one was
-      // (and !liberal).
-      if (!liberal && (x - offW.left > scroller.clientWidth || y - offW.top > scroller.clientHeight))
-        return null;
-      var offL = eltOffset(lineSpace, true);
-      return coordsChar(x - offL.left, y - offL.top);
-    }
-    function onContextMenu(e) {
-      var pos = posFromMouse(e), scrollPos = scroller.scrollTop;
-      if (!pos || window.opera) return; // Opera is difficult.
-      if (posEq(sel.from, sel.to) || posLess(pos, sel.from) || !posLess(pos, sel.to))
-        operation(setCursor)(pos.line, pos.ch);
-
-      var oldCSS = input.style.cssText;
-      inputDiv.style.position = "absolute";
-      input.style.cssText = "position: fixed; width: 30px; height: 30px; top: " + (e.clientY - 5) +
-        "px; left: " + (e.clientX - 5) + "px; z-index: 1000; background: white; " +
-        "border-width: 0; outline: none; overflow: hidden; opacity: .05; filter: alpha(opacity=5);";
-      leaveInputAlone = true;
-      var val = input.value = getSelection();
-      focusInput();
-      selectInput(input);
-      function rehide() {
-        var newVal = splitLines(input.value).join("\n");
-        if (newVal != val) operation(replaceSelection)(newVal, "end");
-        inputDiv.style.position = "relative";
-        input.style.cssText = oldCSS;
-        if (ie_lt9) scroller.scrollTop = scrollPos;
-        leaveInputAlone = false;
-        resetInput(true);
-        slowPoll();
-      }
-
-      if (gecko) {
-        e_stop(e);
-        var mouseup = connect(window, "mouseup", function() {
-          mouseup();
-          setTimeout(rehide, 20);
-        }, true);
+      node.style.top = top + "px";
+      node.style.left = node.style.right = "";
+      if (horiz == "right") {
+        left = display.sizer.clientWidth - node.offsetWidth;
+        node.style.right = "0px";
       } else {
-        setTimeout(rehide, 50);
+        if (horiz == "left") left = 0;
+        else if (horiz == "middle") left = (display.sizer.clientWidth - node.offsetWidth) / 2;
+        node.style.left = left + "px";
       }
-    }
+      if (scroll)
+        scrollIntoView(this, left, top, left + node.offsetWidth, top + node.offsetHeight);
+    },
 
-    // Cursor-blinking
-    function restartBlink() {
-      clearInterval(blinker);
-      var on = true;
-      cursor.style.visibility = "";
-      blinker = setInterval(function() {
-        cursor.style.visibility = (on = !on) ? "" : "hidden";
-      }, 650);
-    }
+    triggerOnKeyDown: operation(null, onKeyDown),
 
-    var matching = {"(": ")>", ")": "(<", "[": "]>", "]": "[<", "{": "}>", "}": "{<"};
-    function matchBrackets(autoclear) {
-      var head = sel.inverted ? sel.from : sel.to, line = getLine(head.line), pos = head.ch - 1;
-      var match = (pos >= 0 && matching[line.text.charAt(pos)]) || matching[line.text.charAt(++pos)];
-      if (!match) return;
-      var ch = match.charAt(0), forward = match.charAt(1) == ">", d = forward ? 1 : -1, st = line.styles;
-      for (var off = pos + 1, i = 0, e = st.length; i < e; i+=2)
-        if ((off -= st[i].length) <= 0) {var style = st[i+1]; break;}
+    execCommand: function(cmd) {
+      if (commands.hasOwnProperty(cmd))
+        return commands[cmd](this);
+    },
 
-      var stack = [line.text.charAt(pos)], re = /[(){}[\]]/;
-      function scan(line, from, to) {
-        if (!line.text) return;
-        var st = line.styles, pos = forward ? 0 : line.text.length - 1, cur;
-        for (var i = forward ? 0 : st.length - 2, e = forward ? st.length : -2; i != e; i += 2*d) {
-          var text = st[i];
-          if (st[i+1] != null && st[i+1] != style) {pos += d * text.length; continue;}
-          for (var j = forward ? 0 : text.length - 1, te = forward ? text.length : -1; j != te; j += d, pos+=d) {
-            if (pos >= from && pos < to && re.test(cur = text.charAt(j))) {
-              var match = matching[cur];
-              if (match.charAt(1) == ">" == forward) stack.push(cur);
-              else if (stack.pop() != match.charAt(0)) return {pos: pos, match: false};
-              else if (!stack.length) return {pos: pos, match: true};
-            }
-          }
-        }
+    findPosH: function(from, amount, unit, visually) {
+      var dir = 1;
+      if (amount < 0) { dir = -1; amount = -amount; }
+      for (var i = 0, cur = clipPos(this.doc, from); i < amount; ++i) {
+        cur = findPosH(this.doc, cur, dir, unit, visually);
+        if (cur.hitSide) break;
       }
-      for (var i = head.line, e = forward ? Math.min(i + 100, doc.size) : Math.max(-1, i - 100); i != e; i+=d) {
-        var line = getLine(i), first = i == head.line;
-        var found = scan(line, first && forward ? pos + 1 : 0, first && !forward ? pos : line.text.length);
-        if (found) break;
+      return cur;
+    },
+
+    moveH: operation(null, function(dir, unit) {
+      var sel = this.doc.sel, pos;
+      if (sel.shift || sel.extend || posEq(sel.from, sel.to))
+        pos = findPosH(this.doc, sel.head, dir, unit, this.options.rtlMoveVisually);
+      else
+        pos = dir < 0 ? sel.from : sel.to;
+      extendSelection(this.doc, pos, pos, dir);
+    }),
+
+    deleteH: operation(null, function(dir, unit) {
+      var sel = this.doc.sel;
+      if (!posEq(sel.from, sel.to)) replaceRange(this.doc, "", sel.from, sel.to, "+delete");
+      else replaceRange(this.doc, "", sel.from, findPosH(this.doc, sel.head, dir, unit, false), "+delete");
+      this.curOp.userSelChange = true;
+    }),
+
+    findPosV: function(from, amount, unit, goalColumn) {
+      var dir = 1, x = goalColumn;
+      if (amount < 0) { dir = -1; amount = -amount; }
+      for (var i = 0, cur = clipPos(this.doc, from); i < amount; ++i) {
+        var coords = cursorCoords(this, cur, "div");
+        if (x == null) x = coords.left;
+        else coords.left = x;
+        cur = findPosV(this, coords, dir, unit);
+        if (cur.hitSide) break;
       }
-      if (!found) found = {pos: null, match: false};
-      var style = found.match ? "CodeMirror-matchingbracket" : "CodeMirror-nonmatchingbracket";
-      var one = markText({line: head.line, ch: pos}, {line: head.line, ch: pos+1}, style),
-          two = found.pos != null && markText({line: i, ch: found.pos}, {line: i, ch: found.pos + 1}, style);
-      var clear = operation(function(){one.clear(); two && two.clear();});
-      if (autoclear) setTimeout(clear, 800);
-      else bracketHighlighted = clear;
-    }
+      return cur;
+    },
 
-    // Finds the line to start with when starting a parse. Tries to
-    // find a line with a stateAfter, so that it can start with a
-    // valid state. If that fails, it returns the line with the
-    // smallest indentation, which tends to need the least context to
-    // parse correctly.
-    function findStartLine(n) {
-      var minindent, minline;
-      for (var search = n, lim = n - 40; search > lim; --search) {
-        if (search == 0) return 0;
-        var line = getLine(search-1);
-        if (line.stateAfter) return search;
-        var indented = line.indentation(options.tabSize);
-        if (minline == null || minindent > indented) {
-          minline = search - 1;
-          minindent = indented;
-        }
+    moveV: operation(null, function(dir, unit) {
+      var sel = this.doc.sel, target, goal;
+      if (sel.shift || sel.extend || posEq(sel.from, sel.to)) {
+        var pos = cursorCoords(this, sel.head, "div");
+        if (sel.goalColumn != null) pos.left = sel.goalColumn;
+        target = findPosV(this, pos, dir, unit);
+        if (unit == "page") addToScrollPos(this, 0, charCoords(this, target, "div").top - pos.top);
+        goal = pos.left;
+      } else {
+        target = dir < 0 ? sel.from : sel.to;
       }
-      return minline;
-    }
-    function getStateBefore(n) {
-      var start = findStartLine(n), state = start && getLine(start-1).stateAfter;
-      if (!state) state = startState(mode);
-      else state = copyState(mode, state);
-      doc.iter(start, n, function(line) {
-        line.highlight(mode, state, options.tabSize);
-        line.stateAfter = copyState(mode, state);
-      });
-      if (start < n) changes.push({from: start, to: n});
-      if (n < doc.size && !getLine(n).stateAfter) work.push(n);
-      return state;
-    }
-    function highlightLines(start, end) {
-      var state = getStateBefore(start);
-      doc.iter(start, end, function(line) {
-        line.highlight(mode, state, options.tabSize);
-        line.stateAfter = copyState(mode, state);
-      });
-    }
-    function highlightWorker() {
-      var end = +new Date + options.workTime;
-      var foundWork = work.length;
-      while (work.length) {
-        if (!getLine(showingFrom).stateAfter) var task = showingFrom;
-        else var task = work.pop();
-        if (task >= doc.size) continue;
-        var start = findStartLine(task), state = start && getLine(start-1).stateAfter;
-        if (state) state = copyState(mode, state);
-        else state = startState(mode);
+      extendSelection(this.doc, target, target, dir);
+      if (goal != null) sel.goalColumn = goal;
+    }),
 
-        var unchanged = 0, compare = mode.compareStates, realChange = false,
-            i = start, bail = false;
-        doc.iter(i, doc.size, function(line) {
-          var hadState = line.stateAfter;
-          if (+new Date > end) {
-            work.push(i);
-            startWorker(options.workDelay);
-            if (realChange) changes.push({from: task, to: i + 1});
-            return (bail = true);
-          }
-          var changed = line.highlight(mode, state, options.tabSize);
-          if (changed) realChange = true;
-          line.stateAfter = copyState(mode, state);
-          if (compare) {
-            if (hadState && compare(hadState, state)) return true;
-          } else {
-            if (changed !== false || !hadState) unchanged = 0;
-            else if (++unchanged > 3 && (!mode.indent || mode.indent(hadState, "") == mode.indent(state, "")))
-              return true;
-          }
-          ++i;
-        });
-        if (bail) return;
-        if (realChange) changes.push({from: task, to: i + 1});
+    toggleOverwrite: function(value) {
+      if (value != null && value == this.state.overwrite) return;
+      if (this.state.overwrite = !this.state.overwrite)
+        this.display.cursor.className += " CodeMirror-overwrite";
+      else
+        this.display.cursor.className = this.display.cursor.className.replace(" CodeMirror-overwrite", "");
+    },
+    hasFocus: function() { return this.state.focused; },
+
+    scrollTo: operation(null, function(x, y) {
+      updateScrollPos(this, x, y);
+    }),
+    getScrollInfo: function() {
+      var scroller = this.display.scroller, co = scrollerCutOff;
+      return {left: scroller.scrollLeft, top: scroller.scrollTop,
+              height: scroller.scrollHeight - co, width: scroller.scrollWidth - co,
+              clientHeight: scroller.clientHeight - co, clientWidth: scroller.clientWidth - co};
+    },
+
+    scrollIntoView: operation(null, function(range, margin) {
+      if (range == null) range = {from: this.doc.sel.head, to: null};
+      else if (typeof range == "number") range = {from: Pos(range, 0), to: null};
+      else if (range.from == null) range = {from: range, to: null};
+      if (!range.to) range.to = range.from;
+      if (!margin) margin = 0;
+
+      var coords = range;
+      if (range.from.line != null) {
+        this.curOp.scrollToPos = {from: range.from, to: range.to, margin: margin};
+        coords = {from: cursorCoords(this, range.from),
+                  to: cursorCoords(this, range.to)};
       }
-      if (foundWork && options.onHighlightComplete)
-        options.onHighlightComplete(instance);
-    }
-    function startWorker(time) {
-      if (!work.length) return;
-      highlight.set(time, operation(highlightWorker));
-    }
+      var sPos = calculateScrollPos(this, Math.min(coords.from.left, coords.to.left),
+                                    Math.min(coords.from.top, coords.to.top) - margin,
+                                    Math.max(coords.from.right, coords.to.right),
+                                    Math.max(coords.from.bottom, coords.to.bottom) + margin);
+      updateScrollPos(this, sPos.scrollLeft, sPos.scrollTop);
+    }),
 
-    // Operations are used to wrap changes in such a way that each
-    // change won't have to update the cursor and display (which would
-    // be awkward, slow, and error-prone), but instead updates are
-    // batched and then all combined and executed at once.
-    function startOperation() {
-      updateInput = userSelChange = textChanged = null;
-      changes = []; selectionChanged = false; callbacks = [];
-    }
-    function endOperation() {
-      var reScroll = false, updated;
-      if (selectionChanged) reScroll = !scrollCursorIntoView();
-      if (changes.length) updated = updateDisplay(changes, true);
-      else {
-        if (selectionChanged) updateSelection();
-        if (gutterDirty) updateGutter();
+    setSize: operation(null, function(width, height) {
+      function interpret(val) {
+        return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val;
       }
-      if (reScroll) scrollCursorIntoView();
-      if (selectionChanged) {scrollEditorIntoView(); restartBlink();}
+      if (width != null) this.display.wrapper.style.width = interpret(width);
+      if (height != null) this.display.wrapper.style.height = interpret(height);
+      if (this.options.lineWrapping)
+        this.display.measureLineCache.length = this.display.measureLineCachePos = 0;
+      this.curOp.forceUpdate = true;
+    }),
 
-      if (focused && !leaveInputAlone &&
-          (updateInput === true || (updateInput !== false && selectionChanged)))
-        resetInput(userSelChange);
+    operation: function(f){return runInOp(this, f);},
 
-      if (selectionChanged && options.matchBrackets)
-        setTimeout(operation(function() {
-          if (bracketHighlighted) {bracketHighlighted(); bracketHighlighted = null;}
-          if (posEq(sel.from, sel.to)) matchBrackets(false);
-        }), 20);
-      var tc = textChanged, cbs = callbacks; // these can be reset by callbacks
-      if (selectionChanged && options.onCursorActivity)
-        options.onCursorActivity(instance);
-      if (tc && options.onChange && instance)
-        options.onChange(instance, tc);
-      for (var i = 0; i < cbs.length; ++i) cbs[i](instance);
-      if (updated && options.onUpdate) options.onUpdate(instance);
-    }
-    var nestedOperation = 0;
-    function operation(f) {
-      return function() {
-        if (!nestedOperation++) startOperation();
-        try {var result = f.apply(this, arguments);}
-        finally {if (!--nestedOperation) endOperation();}
-        return result;
-      };
-    }
+    refresh: operation(null, function() {
+      var badHeight = this.display.cachedTextHeight == null;
+      clearCaches(this);
+      updateScrollPos(this, this.doc.scrollLeft, this.doc.scrollTop);
+      regChange(this);
+      if (badHeight) estimateLineHeights(this);
+    }),
 
-    for (var ext in extensions)
-      if (extensions.propertyIsEnumerable(ext) &&
-          !instance.propertyIsEnumerable(ext))
-        instance[ext] = extensions[ext];
-    return instance;
-  } // (end of function CodeMirror)
+    swapDoc: operation(null, function(doc) {
+      var old = this.doc;
+      old.cm = null;
+      attachDoc(this, doc);
+      clearCaches(this);
+      resetInput(this, true);
+      updateScrollPos(this, doc.scrollLeft, doc.scrollTop);
+      signalLater(this, "swapDoc", this, old);
+      return old;
+    }),
+
+    getInputField: function(){return this.display.input;},
+    getWrapperElement: function(){return this.display.wrapper;},
+    getScrollerElement: function(){return this.display.scroller;},
+    getGutterElement: function(){return this.display.gutters;}
+  };
+  eventMixin(CodeMirror);
+
+  // OPTION DEFAULTS
+
+  var optionHandlers = CodeMirror.optionHandlers = {};
 
   // The default configuration options.
-  CodeMirror.defaults = {
-    value: "",
-    mode: null,
-    theme: "default",
-    indentUnit: 2,
-    indentWithTabs: false,
-    smartIndent: true,
-    tabSize: 4,
-    keyMap: "default",
-    extraKeys: null,
-    electricChars: true,
-    autoClearEmptyLines: false,
-    onKeyEvent: null,
-    lineWrapping: false,
-    lineNumbers: false,
-    gutter: false,
-    fixedGutter: false,
-    firstLineNumber: 1,
-    readOnly: false,
-    onChange: null,
-    onCursorActivity: null,
-    onGutterClick: null,
-    onHighlightComplete: null,
-    onUpdate: null,
-    onFocus: null, onBlur: null, onScroll: null,
-    matchBrackets: false,
-    workTime: 100,
-    workDelay: 200,
-    pollInterval: 100,
-    undoDepth: 40,
-    tabindex: null,
-    autofocus: null
-  };
+  var defaults = CodeMirror.defaults = {};
 
-  var ios = /AppleWebKit/.test(navigator.userAgent) && /Mobile\/\w+/.test(navigator.userAgent);
-  var mac = ios || /Mac/.test(navigator.platform);
-  var win = /Win/.test(navigator.platform);
+  function option(name, deflt, handle, notOnInit) {
+    CodeMirror.defaults[name] = deflt;
+    if (handle) optionHandlers[name] =
+      notOnInit ? function(cm, val, old) {if (old != Init) handle(cm, val, old);} : handle;
+  }
+
+  var Init = CodeMirror.Init = {toString: function(){return "CodeMirror.Init";}};
+
+  // These two are, on init, called from the constructor because they
+  // have to be initialized before the editor can start at all.
+  option("value", "", function(cm, val) {
+    cm.setValue(val);
+  }, true);
+  option("mode", null, function(cm, val) {
+    cm.doc.modeOption = val;
+    loadMode(cm);
+  }, true);
+
+  option("indentUnit", 2, loadMode, true);
+  option("indentWithTabs", false);
+  option("smartIndent", true);
+  option("tabSize", 4, function(cm) {
+    resetModeState(cm);
+    clearCaches(cm);
+    regChange(cm);
+  }, true);
+  option("specialChars", /[\t\u0000-\u0019\u00ad\u200b\u2028\u2029\ufeff]/g, function(cm, val) {
+    cm.options.specialChars = new RegExp(val.source + (val.test("\t") ? "" : "|\t"), "g");
+    cm.refresh();
+  }, true);
+  option("specialCharPlaceholder", defaultSpecialCharPlaceholder, function(cm) {cm.refresh();}, true);
+  option("electricChars", true);
+  option("rtlMoveVisually", !windows);
+  option("wholeLineUpdateBefore", true);
+
+  option("theme", "default", function(cm) {
+    themeChanged(cm);
+    guttersChanged(cm);
+  }, true);
+  option("keyMap", "default", keyMapChanged);
+  option("extraKeys", null);
+
+  option("onKeyEvent", null);
+  option("onDragEvent", null);
+
+  option("lineWrapping", false, wrappingChanged, true);
+  option("gutters", [], function(cm) {
+    setGuttersForLineNumbers(cm.options);
+    guttersChanged(cm);
+  }, true);
+  option("fixedGutter", true, function(cm, val) {
+    cm.display.gutters.style.left = val ? compensateForHScroll(cm.display) + "px" : "0";
+    cm.refresh();
+  }, true);
+  option("coverGutterNextToScrollbar", false, updateScrollbars, true);
+  option("lineNumbers", false, function(cm) {
+    setGuttersForLineNumbers(cm.options);
+    guttersChanged(cm);
+  }, true);
+  option("firstLineNumber", 1, guttersChanged, true);
+  option("lineNumberFormatter", function(integer) {return integer;}, guttersChanged, true);
+  option("showCursorWhenSelecting", false, updateSelection, true);
+
+  option("resetSelectionOnContextMenu", true);
+
+  option("readOnly", false, function(cm, val) {
+    if (val == "nocursor") {
+      onBlur(cm);
+      cm.display.input.blur();
+      cm.display.disabled = true;
+    } else {
+      cm.display.disabled = false;
+      if (!val) resetInput(cm, true);
+    }
+  });
+  option("disableInput", false, function(cm, val) {if (!val) resetInput(cm, true);}, true);
+  option("dragDrop", true);
+
+  option("cursorBlinkRate", 530);
+  option("cursorScrollMargin", 0);
+  option("cursorHeight", 1);
+  option("workTime", 100);
+  option("workDelay", 100);
+  option("flattenSpans", true, resetModeState, true);
+  option("addModeClass", false, resetModeState, true);
+  option("pollInterval", 100);
+  option("undoDepth", 40, function(cm, val){cm.doc.history.undoDepth = val;});
+  option("historyEventDelay", 500);
+  option("viewportMargin", 10, function(cm){cm.refresh();}, true);
+  option("maxHighlightLength", 10000, resetModeState, true);
+  option("crudeMeasuringFrom", 10000);
+  option("moveInputWithCursor", true, function(cm, val) {
+    if (!val) cm.display.inputDiv.style.top = cm.display.inputDiv.style.left = 0;
+  });
+
+  option("tabindex", null, function(cm, val) {
+    cm.display.input.tabIndex = val || "";
+  });
+  option("autofocus", null);
+
+  // MODE DEFINITION AND QUERYING
 
   // Known modes, by name and by MIME
   var modes = CodeMirror.modes = {}, mimeModes = CodeMirror.mimeModes = {};
+
   CodeMirror.defineMode = function(name, mode) {
     if (!CodeMirror.defaults.mode && name != "null") CodeMirror.defaults.mode = name;
+    if (arguments.length > 2) {
+      mode.dependencies = [];
+      for (var i = 2; i < arguments.length; ++i) mode.dependencies.push(arguments[i]);
+    }
     modes[name] = mode;
   };
+
   CodeMirror.defineMIME = function(mime, spec) {
     mimeModes[mime] = spec;
   };
+
   CodeMirror.resolveMode = function(spec) {
-    if (typeof spec == "string" && mimeModes.hasOwnProperty(spec))
+    if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) {
       spec = mimeModes[spec];
-    else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec))
+    } else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty(spec.name)) {
+      var found = mimeModes[spec.name];
+      spec = createObj(found, spec);
+      spec.name = found.name;
+    } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec)) {
       return CodeMirror.resolveMode("application/xml");
+    }
     if (typeof spec == "string") return {name: spec};
     else return spec || {name: "null"};
   };
+
   CodeMirror.getMode = function(options, spec) {
     var spec = CodeMirror.resolveMode(spec);
     var mfactory = modes[spec.name];
-    if (!mfactory) {
-      if (window.console) console.warn("No mode " + spec.name + " found, falling back to plain text.");
-      return CodeMirror.getMode(options, "text/plain");
+    if (!mfactory) return CodeMirror.getMode(options, "text/plain");
+    var modeObj = mfactory(options, spec);
+    if (modeExtensions.hasOwnProperty(spec.name)) {
+      var exts = modeExtensions[spec.name];
+      for (var prop in exts) {
+        if (!exts.hasOwnProperty(prop)) continue;
+        if (modeObj.hasOwnProperty(prop)) modeObj["_" + prop] = modeObj[prop];
+        modeObj[prop] = exts[prop];
+      }
     }
-    return mfactory(options, spec);
-  };
-  CodeMirror.listModes = function() {
-    var list = [];
-    for (var m in modes)
-      if (modes.propertyIsEnumerable(m)) list.push(m);
-    return list;
-  };
-  CodeMirror.listMIMEs = function() {
-    var list = [];
-    for (var m in mimeModes)
-      if (mimeModes.propertyIsEnumerable(m)) list.push({mime: m, mode: mimeModes[m]});
-    return list;
+    modeObj.name = spec.name;
+    if (spec.helperType) modeObj.helperType = spec.helperType;
+    if (spec.modeProps) for (var prop in spec.modeProps)
+      modeObj[prop] = spec.modeProps[prop];
+
+    return modeObj;
   };
 
-  var extensions = CodeMirror.extensions = {};
+  CodeMirror.defineMode("null", function() {
+    return {token: function(stream) {stream.skipToEnd();}};
+  });
+  CodeMirror.defineMIME("text/plain", "null");
+
+  var modeExtensions = CodeMirror.modeExtensions = {};
+  CodeMirror.extendMode = function(mode, properties) {
+    var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {});
+    copyObj(properties, exts);
+  };
+
+  // EXTENSIONS
+
   CodeMirror.defineExtension = function(name, func) {
-    extensions[name] = func;
+    CodeMirror.prototype[name] = func;
+  };
+  CodeMirror.defineDocExtension = function(name, func) {
+    Doc.prototype[name] = func;
+  };
+  CodeMirror.defineOption = option;
+
+  var initHooks = [];
+  CodeMirror.defineInitHook = function(f) {initHooks.push(f);};
+
+  var helpers = CodeMirror.helpers = {};
+  CodeMirror.registerHelper = function(type, name, value) {
+    if (!helpers.hasOwnProperty(type)) helpers[type] = CodeMirror[type] = {_global: []};
+    helpers[type][name] = value;
+  };
+  CodeMirror.registerGlobalHelper = function(type, name, predicate, value) {
+    CodeMirror.registerHelper(type, name, value);
+    helpers[type]._global.push({pred: predicate, val: value});
   };
 
-  var commands = CodeMirror.commands = {
-    selectAll: function(cm) {cm.setSelection({line: 0, ch: 0}, {line: cm.lineCount() - 1});},
-    killLine: function(cm) {
-      var from = cm.getCursor(true), to = cm.getCursor(false), sel = !posEq(from, to);
-      if (!sel && cm.getLine(from.line).length == from.ch) cm.replaceRange("", from, {line: from.line + 1, ch: 0});
-      else cm.replaceRange("", from, sel ? to : {line: from.line});
-    },
-    deleteLine: function(cm) {var l = cm.getCursor().line; cm.replaceRange("", {line: l, ch: 0}, {line: l});},
-    undo: function(cm) {cm.undo();},
-    redo: function(cm) {cm.redo();},
-    goDocStart: function(cm) {cm.setCursor(0, 0, true);},
-    goDocEnd: function(cm) {cm.setSelection({line: cm.lineCount() - 1}, null, true);},
-    goLineStart: function(cm) {cm.setCursor(cm.getCursor().line, 0, true);},
-    goLineStartSmart: function(cm) {
-      var cur = cm.getCursor();
-      var text = cm.getLine(cur.line), firstNonWS = Math.max(0, text.search(/\S/));
-      cm.setCursor(cur.line, cur.ch <= firstNonWS && cur.ch ? 0 : firstNonWS, true);
-    },
-    goLineEnd: function(cm) {cm.setSelection({line: cm.getCursor().line}, null, true);},
-    goLineUp: function(cm) {cm.moveV(-1, "line");},
-    goLineDown: function(cm) {cm.moveV(1, "line");},
-    goPageUp: function(cm) {cm.moveV(-1, "page");},
-    goPageDown: function(cm) {cm.moveV(1, "page");},
-    goCharLeft: function(cm) {cm.moveH(-1, "char");},
-    goCharRight: function(cm) {cm.moveH(1, "char");},
-    goColumnLeft: function(cm) {cm.moveH(-1, "column");},
-    goColumnRight: function(cm) {cm.moveH(1, "column");},
-    goWordLeft: function(cm) {cm.moveH(-1, "word");},
-    goWordRight: function(cm) {cm.moveH(1, "word");},
-    delCharLeft: function(cm) {cm.deleteH(-1, "char");},
-    delCharRight: function(cm) {cm.deleteH(1, "char");},
-    delWordLeft: function(cm) {cm.deleteH(-1, "word");},
-    delWordRight: function(cm) {cm.deleteH(1, "word");},
-    indentAuto: function(cm) {cm.indentSelection("smart");},
-    indentMore: function(cm) {cm.indentSelection("add");},
-    indentLess: function(cm) {cm.indentSelection("subtract");},
-    insertTab: function(cm) {cm.replaceSelection("\t", "end");},
-    transposeChars: function(cm) {
-      var cur = cm.getCursor(), line = cm.getLine(cur.line);
-      if (cur.ch > 0 && cur.ch < line.length - 1)
-        cm.replaceRange(line.charAt(cur.ch) + line.charAt(cur.ch - 1),
-                        {line: cur.line, ch: cur.ch - 1}, {line: cur.line, ch: cur.ch + 1});
-    },
-    newlineAndIndent: function(cm) {
-      cm.replaceSelection("\n", "end");
-      cm.indentLine(cm.getCursor().line);
-    },
-    toggleOverwrite: function(cm) {cm.toggleOverwrite();}
-  };
+  // UTILITIES
 
-  var keyMap = CodeMirror.keyMap = {};
-  keyMap.basic = {
-    "Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",
-    "End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",
-    "Delete": "delCharRight", "Backspace": "delCharLeft", "Tab": "insertTab", "Shift-Tab": "indentAuto",
-    "Enter": "newlineAndIndent", "Insert": "toggleOverwrite"
-  };
-  // Note that the save and find-related commands aren't defined by
-  // default. Unknown commands are simply ignored.
-  keyMap.pcDefault = {
-    "Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",
-    "Ctrl-Home": "goDocStart", "Alt-Up": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Down": "goDocEnd",
-    "Ctrl-Left": "goWordLeft", "Ctrl-Right": "goWordRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",
-    "Ctrl-Backspace": "delWordLeft", "Ctrl-Delete": "delWordRight", "Ctrl-S": "save", "Ctrl-F": "find",
-    "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
-    "Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
-    fallthrough: "basic"
-  };
-  keyMap.macDefault = {
-    "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
-    "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goWordLeft",
-    "Alt-Right": "goWordRight", "Cmd-Left": "goLineStart", "Cmd-Right": "goLineEnd", "Alt-Backspace": "delWordLeft",
-    "Ctrl-Alt-Backspace": "delWordRight", "Alt-Delete": "delWordRight", "Cmd-S": "save", "Cmd-F": "find",
-    "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",
-    "Cmd-[": "indentLess", "Cmd-]": "indentMore",
-    fallthrough: ["basic", "emacsy"]
-  };
-  keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault;
-  keyMap.emacsy = {
-    "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
-    "Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd",
-    "Ctrl-V": "goPageUp", "Shift-Ctrl-V": "goPageDown", "Ctrl-D": "delCharRight", "Ctrl-H": "delCharLeft",
-    "Alt-D": "delWordRight", "Alt-Backspace": "delWordLeft", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars"
-  };
+  CodeMirror.isWordChar = isWordChar;
 
-  function getKeyMap(val) {
-    if (typeof val == "string") return keyMap[val];
-    else return val;
-  }
-  function lookupKey(name, extraMap, map, handle) {
-    function lookup(map) {
-      map = getKeyMap(map);
-      var found = map[name];
-      if (found != null && handle(found)) return true;
-      if (map.catchall) return handle(map.catchall);
-      var fallthrough = map.fallthrough;
-      if (fallthrough == null) return false;
-      if (Object.prototype.toString.call(fallthrough) != "[object Array]")
-        return lookup(fallthrough);
-      for (var i = 0, e = fallthrough.length; i < e; ++i) {
-        if (lookup(fallthrough[i])) return true;
-      }
-      return false;
-    }
-    if (extraMap && lookup(extraMap)) return true;
-    return lookup(map);
-  }
-  function isModifierKey(event) {
-    var name = keyNames[e_prop(event, "keyCode")];
-    return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod";
-  }
-
-  CodeMirror.fromTextArea = function(textarea, options) {
-    if (!options) options = {};
-    options.value = textarea.value;
-    if (!options.tabindex && textarea.tabindex)
-      options.tabindex = textarea.tabindex;
-    if (options.autofocus == null && textarea.getAttribute("autofocus") != null)
-      options.autofocus = true;
-
-    function save() {textarea.value = instance.getValue();}
-    if (textarea.form) {
-      // Deplorable hack to make the submit method do the right thing.
-      var rmSubmit = connect(textarea.form, "submit", save, true);
-      if (typeof textarea.form.submit == "function") {
-        var realSubmit = textarea.form.submit;
-        function wrappedSubmit() {
-          save();
-          textarea.form.submit = realSubmit;
-          textarea.form.submit();
-          textarea.form.submit = wrappedSubmit;
-        }
-        textarea.form.submit = wrappedSubmit;
-      }
-    }
-
-    textarea.style.display = "none";
-    var instance = CodeMirror(function(node) {
-      textarea.parentNode.insertBefore(node, textarea.nextSibling);
-    }, options);
-    instance.save = save;
-    instance.getTextArea = function() { return textarea; };
-    instance.toTextArea = function() {
-      save();
-      textarea.parentNode.removeChild(instance.getWrapperElement());
-      textarea.style.display = "";
-      if (textarea.form) {
-        rmSubmit();
-        if (typeof textarea.form.submit == "function")
-          textarea.form.submit = realSubmit;
-      }
-    };
-    return instance;
-  };
+  // MODE STATE HANDLING
 
   // Utility functions for working with state. Exported because modes
   // sometimes need to do this.
@@ -2160,21 +3537,271 @@ var CodeMirror = (function() {
     return nstate;
   }
   CodeMirror.copyState = copyState;
+
   function startState(mode, a1, a2) {
     return mode.startState ? mode.startState(a1, a2) : true;
   }
   CodeMirror.startState = startState;
 
+  CodeMirror.innerMode = function(mode, state) {
+    while (mode.innerMode) {
+      var info = mode.innerMode(state);
+      if (!info || info.mode == mode) break;
+      state = info.state;
+      mode = info.mode;
+    }
+    return info || {mode: mode, state: state};
+  };
+
+  // STANDARD COMMANDS
+
+  var commands = CodeMirror.commands = {
+    selectAll: function(cm) {cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.lastLine()));},
+    killLine: function(cm) {
+      var from = cm.getCursor(true), to = cm.getCursor(false), sel = !posEq(from, to);
+      if (!sel && cm.getLine(from.line).length == from.ch)
+        cm.replaceRange("", from, Pos(from.line + 1, 0), "+delete");
+      else cm.replaceRange("", from, sel ? to : Pos(from.line), "+delete");
+    },
+    deleteLine: function(cm) {
+      var l = cm.getCursor().line;
+      cm.replaceRange("", Pos(l, 0), Pos(l), "+delete");
+    },
+    delLineLeft: function(cm) {
+      var cur = cm.getCursor();
+      cm.replaceRange("", Pos(cur.line, 0), cur, "+delete");
+    },
+    undo: function(cm) {cm.undo();},
+    redo: function(cm) {cm.redo();},
+    goDocStart: function(cm) {cm.extendSelection(Pos(cm.firstLine(), 0));},
+    goDocEnd: function(cm) {cm.extendSelection(Pos(cm.lastLine()));},
+    goLineStart: function(cm) {
+      cm.extendSelection(lineStart(cm, cm.getCursor().line));
+    },
+    goLineStartSmart: function(cm) {
+      var cur = cm.getCursor(), start = lineStart(cm, cur.line);
+      var line = cm.getLineHandle(start.line);
+      var order = getOrder(line);
+      if (!order || order[0].level == 0) {
+        var firstNonWS = Math.max(0, line.text.search(/\S/));
+        var inWS = cur.line == start.line && cur.ch <= firstNonWS && cur.ch;
+        cm.extendSelection(Pos(start.line, inWS ? 0 : firstNonWS));
+      } else cm.extendSelection(start);
+    },
+    goLineEnd: function(cm) {
+      cm.extendSelection(lineEnd(cm, cm.getCursor().line));
+    },
+    goLineRight: function(cm) {
+      var top = cm.charCoords(cm.getCursor(), "div").top + 5;
+      cm.extendSelection(cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div"));
+    },
+    goLineLeft: function(cm) {
+      var top = cm.charCoords(cm.getCursor(), "div").top + 5;
+      cm.extendSelection(cm.coordsChar({left: 0, top: top}, "div"));
+    },
+    goLineUp: function(cm) {cm.moveV(-1, "line");},
+    goLineDown: function(cm) {cm.moveV(1, "line");},
+    goPageUp: function(cm) {cm.moveV(-1, "page");},
+    goPageDown: function(cm) {cm.moveV(1, "page");},
+    goCharLeft: function(cm) {cm.moveH(-1, "char");},
+    goCharRight: function(cm) {cm.moveH(1, "char");},
+    goColumnLeft: function(cm) {cm.moveH(-1, "column");},
+    goColumnRight: function(cm) {cm.moveH(1, "column");},
+    goWordLeft: function(cm) {cm.moveH(-1, "word");},
+    goGroupRight: function(cm) {cm.moveH(1, "group");},
+    goGroupLeft: function(cm) {cm.moveH(-1, "group");},
+    goWordRight: function(cm) {cm.moveH(1, "word");},
+    delCharBefore: function(cm) {cm.deleteH(-1, "char");},
+    delCharAfter: function(cm) {cm.deleteH(1, "char");},
+    delWordBefore: function(cm) {cm.deleteH(-1, "word");},
+    delWordAfter: function(cm) {cm.deleteH(1, "word");},
+    delGroupBefore: function(cm) {cm.deleteH(-1, "group");},
+    delGroupAfter: function(cm) {cm.deleteH(1, "group");},
+    indentAuto: function(cm) {cm.indentSelection("smart");},
+    indentMore: function(cm) {cm.indentSelection("add");},
+    indentLess: function(cm) {cm.indentSelection("subtract");},
+    insertTab: function(cm) {
+      cm.replaceSelection("\t", "end", "+input");
+    },
+    defaultTab: function(cm) {
+      if (cm.somethingSelected()) cm.indentSelection("add");
+      else cm.replaceSelection("\t", "end", "+input");
+    },
+    transposeChars: function(cm) {
+      var cur = cm.getCursor(), line = cm.getLine(cur.line);
+      if (cur.ch > 0 && cur.ch < line.length - 1)
+        cm.replaceRange(line.charAt(cur.ch) + line.charAt(cur.ch - 1),
+                        Pos(cur.line, cur.ch - 1), Pos(cur.line, cur.ch + 1));
+    },
+    newlineAndIndent: function(cm) {
+      operation(cm, function() {
+        cm.replaceSelection("\n", "end", "+input");
+        cm.indentLine(cm.getCursor().line, null, true);
+      })();
+    },
+    toggleOverwrite: function(cm) {cm.toggleOverwrite();}
+  };
+
+  // STANDARD KEYMAPS
+
+  var keyMap = CodeMirror.keyMap = {};
+  keyMap.basic = {
+    "Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",
+    "End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",
+    "Delete": "delCharAfter", "Backspace": "delCharBefore", "Shift-Backspace": "delCharBefore",
+    "Tab": "defaultTab", "Shift-Tab": "indentAuto",
+    "Enter": "newlineAndIndent", "Insert": "toggleOverwrite"
+  };
+  // Note that the save and find-related commands aren't defined by
+  // default. Unknown commands are simply ignored.
+  keyMap.pcDefault = {
+    "Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",
+    "Ctrl-Home": "goDocStart", "Alt-Up": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Down": "goDocEnd",
+    "Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",
+    "Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S": "save", "Ctrl-F": "find",
+    "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
+    "Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
+    fallthrough: "basic"
+  };
+  keyMap.macDefault = {
+    "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
+    "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft",
+    "Alt-Right": "goGroupRight", "Cmd-Left": "goLineStart", "Cmd-Right": "goLineEnd", "Alt-Backspace": "delGroupBefore",
+    "Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S": "save", "Cmd-F": "find",
+    "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",
+    "Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delLineLeft",
+    fallthrough: ["basic", "emacsy"]
+  };
+  keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault;
+  keyMap.emacsy = {
+    "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
+    "Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd",
+    "Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore",
+    "Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars"
+  };
+
+  // KEYMAP DISPATCH
+
+  function getKeyMap(val) {
+    if (typeof val == "string") return keyMap[val];
+    else return val;
+  }
+
+  function lookupKey(name, maps, handle) {
+    function lookup(map) {
+      map = getKeyMap(map);
+      var found = map[name];
+      if (found === false) return "stop";
+      if (found != null && handle(found)) return true;
+      if (map.nofallthrough) return "stop";
+
+      var fallthrough = map.fallthrough;
+      if (fallthrough == null) return false;
+      if (Object.prototype.toString.call(fallthrough) != "[object Array]")
+        return lookup(fallthrough);
+      for (var i = 0, e = fallthrough.length; i < e; ++i) {
+        var done = lookup(fallthrough[i]);
+        if (done) return done;
+      }
+      return false;
+    }
+
+    for (var i = 0; i < maps.length; ++i) {
+      var done = lookup(maps[i]);
+      if (done) return done != "stop";
+    }
+  }
+  function isModifierKey(event) {
+    var name = keyNames[event.keyCode];
+    return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod";
+  }
+  function keyName(event, noShift) {
+    if (opera && event.keyCode == 34 && event["char"]) return false;
+    var name = keyNames[event.keyCode];
+    if (name == null || event.altGraphKey) return false;
+    if (event.altKey) name = "Alt-" + name;
+    if (flipCtrlCmd ? event.metaKey : event.ctrlKey) name = "Ctrl-" + name;
+    if (flipCtrlCmd ? event.ctrlKey : event.metaKey) name = "Cmd-" + name;
+    if (!noShift && event.shiftKey) name = "Shift-" + name;
+    return name;
+  }
+  CodeMirror.lookupKey = lookupKey;
+  CodeMirror.isModifierKey = isModifierKey;
+  CodeMirror.keyName = keyName;
+
+  // FROMTEXTAREA
+
+  CodeMirror.fromTextArea = function(textarea, options) {
+    if (!options) options = {};
+    options.value = textarea.value;
+    if (!options.tabindex && textarea.tabindex)
+      options.tabindex = textarea.tabindex;
+    if (!options.placeholder && textarea.placeholder)
+      options.placeholder = textarea.placeholder;
+    // Set autofocus to true if this textarea is focused, or if it has
+    // autofocus and no other element is focused.
+    if (options.autofocus == null) {
+      var hasFocus = document.body;
+      // doc.activeElement occasionally throws on IE
+      try { hasFocus = document.activeElement; } catch(e) {}
+      options.autofocus = hasFocus == textarea ||
+        textarea.getAttribute("autofocus") != null && hasFocus == document.body;
+    }
+
+    function save() {textarea.value = cm.getValue();}
+    if (textarea.form) {
+      on(textarea.form, "submit", save);
+      // Deplorable hack to make the submit method do the right thing.
+      if (!options.leaveSubmitMethodAlone) {
+        var form = textarea.form, realSubmit = form.submit;
+        try {
+          var wrappedSubmit = form.submit = function() {
+            save();
+            form.submit = realSubmit;
+            form.submit();
+            form.submit = wrappedSubmit;
+          };
+        } catch(e) {}
+      }
+    }
+
+    textarea.style.display = "none";
+    var cm = CodeMirror(function(node) {
+      textarea.parentNode.insertBefore(node, textarea.nextSibling);
+    }, options);
+    cm.save = save;
+    cm.getTextArea = function() { return textarea; };
+    cm.toTextArea = function() {
+      save();
+      textarea.parentNode.removeChild(cm.getWrapperElement());
+      textarea.style.display = "";
+      if (textarea.form) {
+        off(textarea.form, "submit", save);
+        if (typeof textarea.form.submit == "function")
+          textarea.form.submit = realSubmit;
+      }
+    };
+    return cm;
+  };
+
+  // STRING STREAM
+
+  // Fed to the mode parsers, provides helper functions to make
+  // parsers more succinct.
+
   // The character stream used by a mode's parser.
   function StringStream(string, tabSize) {
     this.pos = this.start = 0;
     this.string = string;
     this.tabSize = tabSize || 8;
+    this.lastColumnPos = this.lastColumnValue = 0;
+    this.lineStart = 0;
   }
+
   StringStream.prototype = {
     eol: function() {return this.pos >= this.string.length;},
-    sol: function() {return this.pos == 0;},
-    peek: function() {return this.string.charAt(this.pos);},
+    sol: function() {return this.pos == this.lineStart;},
+    peek: function() {return this.string.charAt(this.pos) || undefined;},
     next: function() {
       if (this.pos < this.string.length)
         return this.string.charAt(this.pos++);
@@ -2201,370 +3828,963 @@ var CodeMirror = (function() {
       if (found > -1) {this.pos = found; return true;}
     },
     backUp: function(n) {this.pos -= n;},
-    column: function() {return countColumn(this.string, this.start, this.tabSize);},
-    indentation: function() {return countColumn(this.string, null, this.tabSize);},
+    column: function() {
+      if (this.lastColumnPos < this.start) {
+        this.lastColumnValue = countColumn(this.string, this.start, this.tabSize, this.lastColumnPos, this.lastColumnValue);
+        this.lastColumnPos = this.start;
+      }
+      return this.lastColumnValue - (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0);
+    },
+    indentation: function() {
+      return countColumn(this.string, null, this.tabSize) -
+        (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0);
+    },
     match: function(pattern, consume, caseInsensitive) {
       if (typeof pattern == "string") {
-        function cased(str) {return caseInsensitive ? str.toLowerCase() : str;}
-        if (cased(this.string).indexOf(cased(pattern), this.pos) == this.pos) {
+        var cased = function(str) {return caseInsensitive ? str.toLowerCase() : str;};
+        var substr = this.string.substr(this.pos, pattern.length);
+        if (cased(substr) == cased(pattern)) {
           if (consume !== false) this.pos += pattern.length;
           return true;
         }
-      }
-      else {
+      } else {
         var match = this.string.slice(this.pos).match(pattern);
+        if (match && match.index > 0) return null;
         if (match && consume !== false) this.pos += match[0].length;
         return match;
       }
     },
-    current: function(){return this.string.slice(this.start, this.pos);}
+    current: function(){return this.string.slice(this.start, this.pos);},
+    hideFirstChars: function(n, inner) {
+      this.lineStart += n;
+      try { return inner(); }
+      finally { this.lineStart -= n; }
+    }
   };
   CodeMirror.StringStream = StringStream;
 
-  function MarkedText(from, to, className, marker) {
-    this.from = from; this.to = to; this.style = className; this.marker = marker;
-  }
-  MarkedText.prototype = {
-    attach: function(line) { this.marker.set.push(line); },
-    detach: function(line) {
-      var ix = indexOf(this.marker.set, line);
-      if (ix > -1) this.marker.set.splice(ix, 1);
-    },
-    split: function(pos, lenBefore) {
-      if (this.to <= pos && this.to != null) return null;
-      var from = this.from < pos || this.from == null ? null : this.from - pos + lenBefore;
-      var to = this.to == null ? null : this.to - pos + lenBefore;
-      return new MarkedText(from, to, this.style, this.marker);
-    },
-    dup: function() { return new MarkedText(null, null, this.style, this.marker); },
-    clipTo: function(fromOpen, from, toOpen, to, diff) {
-      if (fromOpen && to > this.from && (to < this.to || this.to == null))
-        this.from = null;
-      else if (this.from != null && this.from >= from)
-        this.from = Math.max(to, this.from) + diff;
-      if (toOpen && (from < this.to || this.to == null) && (from > this.from || this.from == null))
-        this.to = null;
-      else if (this.to != null && this.to > from)
-        this.to = to < this.to ? this.to + diff : from;
-    },
-    isDead: function() { return this.from != null && this.to != null && this.from >= this.to; },
-    sameSet: function(x) { return this.marker == x.marker; }
-  };
+  // TEXTMARKERS
 
-  function Bookmark(pos) {
-    this.from = pos; this.to = pos; this.line = null;
+  function TextMarker(doc, type) {
+    this.lines = [];
+    this.type = type;
+    this.doc = doc;
   }
-  Bookmark.prototype = {
-    attach: function(line) { this.line = line; },
-    detach: function(line) { if (this.line == line) this.line = null; },
-    split: function(pos, lenBefore) {
-      if (pos < this.from) {
-        this.from = this.to = (this.from - pos) + lenBefore;
-        return this;
-      }
-    },
-    isDead: function() { return this.from > this.to; },
-    clipTo: function(fromOpen, from, toOpen, to, diff) {
-      if ((fromOpen || from < this.from) && (toOpen || to > this.to)) {
-        this.from = 0; this.to = -1;
-      } else if (this.from > from) {
-        this.from = this.to = Math.max(to, this.from) + diff;
-      }
-    },
-    sameSet: function(x) { return false; },
-    find: function() {
-      if (!this.line || !this.line.parent) return null;
-      return {line: lineNo(this.line), ch: this.from};
-    },
-    clear: function() {
-      if (this.line) {
-        var found = indexOf(this.line.marked, this);
-        if (found != -1) this.line.marked.splice(found, 1);
-        this.line = null;
+  CodeMirror.TextMarker = TextMarker;
+  eventMixin(TextMarker);
+
+  TextMarker.prototype.clear = function() {
+    if (this.explicitlyCleared) return;
+    var cm = this.doc.cm, withOp = cm && !cm.curOp;
+    if (withOp) startOperation(cm);
+    if (hasHandler(this, "clear")) {
+      var found = this.find();
+      if (found) signalLater(this, "clear", found.from, found.to);
+    }
+    var min = null, max = null;
+    for (var i = 0; i < this.lines.length; ++i) {
+      var line = this.lines[i];
+      var span = getMarkedSpanFor(line.markedSpans, this);
+      if (span.to != null) max = lineNo(line);
+      line.markedSpans = removeMarkedSpan(line.markedSpans, span);
+      if (span.from != null)
+        min = lineNo(line);
+      else if (this.collapsed && !lineIsHidden(this.doc, line) && cm)
+        updateLineHeight(line, textHeight(cm.display));
+    }
+    if (cm && this.collapsed && !cm.options.lineWrapping) for (var i = 0; i < this.lines.length; ++i) {
+      var visual = visualLine(cm.doc, this.lines[i]), len = lineLength(cm.doc, visual);
+      if (len > cm.display.maxLineLength) {
+        cm.display.maxLine = visual;
+        cm.display.maxLineLength = len;
+        cm.display.maxLineChanged = true;
       }
     }
+
+    if (min != null && cm) regChange(cm, min, max + 1);
+    this.lines.length = 0;
+    this.explicitlyCleared = true;
+    if (this.atomic && this.doc.cantEdit) {
+      this.doc.cantEdit = false;
+      if (cm) reCheckSelection(cm);
+    }
+    if (withOp) endOperation(cm);
   };
 
+  TextMarker.prototype.find = function(bothSides) {
+    var from, to;
+    for (var i = 0; i < this.lines.length; ++i) {
+      var line = this.lines[i];
+      var span = getMarkedSpanFor(line.markedSpans, this);
+      if (span.from != null || span.to != null) {
+        var found = lineNo(line);
+        if (span.from != null) from = Pos(found, span.from);
+        if (span.to != null) to = Pos(found, span.to);
+      }
+    }
+    if (this.type == "bookmark" && !bothSides) return from;
+    return from && {from: from, to: to};
+  };
+
+  TextMarker.prototype.changed = function() {
+    var pos = this.find(), cm = this.doc.cm;
+    if (!pos || !cm) return;
+    if (this.type != "bookmark") pos = pos.from;
+    var line = getLine(this.doc, pos.line);
+    clearCachedMeasurement(cm, line);
+    if (pos.line >= cm.display.showingFrom && pos.line < cm.display.showingTo) {
+      for (var node = cm.display.lineDiv.firstChild; node; node = node.nextSibling) if (node.lineObj == line) {
+        if (node.offsetHeight != line.height) updateLineHeight(line, node.offsetHeight);
+        break;
+      }
+      runInOp(cm, function() {
+        cm.curOp.selectionChanged = cm.curOp.forceUpdate = cm.curOp.updateMaxLine = true;
+      });
+    }
+  };
+
+  TextMarker.prototype.attachLine = function(line) {
+    if (!this.lines.length && this.doc.cm) {
+      var op = this.doc.cm.curOp;
+      if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1)
+        (op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this);
+    }
+    this.lines.push(line);
+  };
+  TextMarker.prototype.detachLine = function(line) {
+    this.lines.splice(indexOf(this.lines, line), 1);
+    if (!this.lines.length && this.doc.cm) {
+      var op = this.doc.cm.curOp;
+      (op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this);
+    }
+  };
+
+  var nextMarkerId = 0;
+
+  function markText(doc, from, to, options, type) {
+    if (options && options.shared) return markTextShared(doc, from, to, options, type);
+    if (doc.cm && !doc.cm.curOp) return operation(doc.cm, markText)(doc, from, to, options, type);
+
+    var marker = new TextMarker(doc, type);
+    if (options) copyObj(options, marker);
+    if (posLess(to, from) || posEq(from, to) && marker.clearWhenEmpty !== false)
+      return marker;
+    if (marker.replacedWith) {
+      marker.collapsed = true;
+      marker.replacedWith = elt("span", [marker.replacedWith], "CodeMirror-widget");
+      if (!options.handleMouseEvents) marker.replacedWith.ignoreEvents = true;
+    }
+    if (marker.collapsed) {
+      if (conflictingCollapsedRange(doc, from.line, from, to, marker) ||
+          from.line != to.line && conflictingCollapsedRange(doc, to.line, from, to, marker))
+        throw new Error("Inserting collapsed marker partially overlapping an existing one");
+      sawCollapsedSpans = true;
+    }
+
+    if (marker.addToHistory)
+      addToHistory(doc, {from: from, to: to, origin: "markText"},
+                   {head: doc.sel.head, anchor: doc.sel.anchor}, NaN);
+
+    var curLine = from.line, cm = doc.cm, updateMaxLine;
+    doc.iter(curLine, to.line + 1, function(line) {
+      if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(doc, line) == cm.display.maxLine)
+        updateMaxLine = true;
+      var span = {from: null, to: null, marker: marker};
+      if (curLine == from.line) span.from = from.ch;
+      if (curLine == to.line) span.to = to.ch;
+      if (marker.collapsed && curLine != from.line) updateLineHeight(line, 0);
+      addMarkedSpan(line, span);
+      ++curLine;
+    });
+    if (marker.collapsed) doc.iter(from.line, to.line + 1, function(line) {
+      if (lineIsHidden(doc, line)) updateLineHeight(line, 0);
+    });
+
+    if (marker.clearOnEnter) on(marker, "beforeCursorEnter", function() { marker.clear(); });
+
+    if (marker.readOnly) {
+      sawReadOnlySpans = true;
+      if (doc.history.done.length || doc.history.undone.length)
+        doc.clearHistory();
+    }
+    if (marker.collapsed) {
+      marker.id = ++nextMarkerId;
+      marker.atomic = true;
+    }
+    if (cm) {
+      if (updateMaxLine) cm.curOp.updateMaxLine = true;
+      if (marker.className || marker.title || marker.startStyle || marker.endStyle || marker.collapsed)
+        regChange(cm, from.line, to.line + 1);
+      if (marker.atomic) reCheckSelection(cm);
+    }
+    return marker;
+  }
+
+  // SHARED TEXTMARKERS
+
+  function SharedTextMarker(markers, primary) {
+    this.markers = markers;
+    this.primary = primary;
+    for (var i = 0, me = this; i < markers.length; ++i) {
+      markers[i].parent = this;
+      on(markers[i], "clear", function(){me.clear();});
+    }
+  }
+  CodeMirror.SharedTextMarker = SharedTextMarker;
+  eventMixin(SharedTextMarker);
+
+  SharedTextMarker.prototype.clear = function() {
+    if (this.explicitlyCleared) return;
+    this.explicitlyCleared = true;
+    for (var i = 0; i < this.markers.length; ++i)
+      this.markers[i].clear();
+    signalLater(this, "clear");
+  };
+  SharedTextMarker.prototype.find = function() {
+    return this.primary.find();
+  };
+
+  function markTextShared(doc, from, to, options, type) {
+    options = copyObj(options);
+    options.shared = false;
+    var markers = [markText(doc, from, to, options, type)], primary = markers[0];
+    var widget = options.replacedWith;
+    linkedDocs(doc, function(doc) {
+      if (widget) options.replacedWith = widget.cloneNode(true);
+      markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options, type));
+      for (var i = 0; i < doc.linked.length; ++i)
+        if (doc.linked[i].isParent) return;
+      primary = lst(markers);
+    });
+    return new SharedTextMarker(markers, primary);
+  }
+
+  // TEXTMARKER SPANS
+
+  function getMarkedSpanFor(spans, marker) {
+    if (spans) for (var i = 0; i < spans.length; ++i) {
+      var span = spans[i];
+      if (span.marker == marker) return span;
+    }
+  }
+  function removeMarkedSpan(spans, span) {
+    for (var r, i = 0; i < spans.length; ++i)
+      if (spans[i] != span) (r || (r = [])).push(spans[i]);
+    return r;
+  }
+  function addMarkedSpan(line, span) {
+    line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [span];
+    span.marker.attachLine(line);
+  }
+
+  function markedSpansBefore(old, startCh, isInsert) {
+    if (old) for (var i = 0, nw; i < old.length; ++i) {
+      var span = old[i], marker = span.marker;
+      var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh);
+      if (startsBefore || span.from == startCh && marker.type == "bookmark" && (!isInsert || !span.marker.insertLeft)) {
+        var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= startCh : span.to > startCh);
+        (nw || (nw = [])).push({from: span.from,
+                                to: endsAfter ? null : span.to,
+                                marker: marker});
+      }
+    }
+    return nw;
+  }
+
+  function markedSpansAfter(old, endCh, isInsert) {
+    if (old) for (var i = 0, nw; i < old.length; ++i) {
+      var span = old[i], marker = span.marker;
+      var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= endCh : span.to > endCh);
+      if (endsAfter || span.from == endCh && marker.type == "bookmark" && (!isInsert || span.marker.insertLeft)) {
+        var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= endCh : span.from < endCh);
+        (nw || (nw = [])).push({from: startsBefore ? null : span.from - endCh,
+                                to: span.to == null ? null : span.to - endCh,
+                                marker: marker});
+      }
+    }
+    return nw;
+  }
+
+  function stretchSpansOverChange(doc, change) {
+    var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.line).markedSpans;
+    var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).markedSpans;
+    if (!oldFirst && !oldLast) return null;
+
+    var startCh = change.from.ch, endCh = change.to.ch, isInsert = posEq(change.from, change.to);
+    // Get the spans that 'stick out' on both sides
+    var first = markedSpansBefore(oldFirst, startCh, isInsert);
+    var last = markedSpansAfter(oldLast, endCh, isInsert);
+
+    // Next, merge those two ends
+    var sameLine = change.text.length == 1, offset = lst(change.text).length + (sameLine ? startCh : 0);
+    if (first) {
+      // Fix up .to properties of first
+      for (var i = 0; i < first.length; ++i) {
+        var span = first[i];
+        if (span.to == null) {
+          var found = getMarkedSpanFor(last, span.marker);
+          if (!found) span.to = startCh;
+          else if (sameLine) span.to = found.to == null ? null : found.to + offset;
+        }
+      }
+    }
+    if (last) {
+      // Fix up .from in last (or move them into first in case of sameLine)
+      for (var i = 0; i < last.length; ++i) {
+        var span = last[i];
+        if (span.to != null) span.to += offset;
+        if (span.from == null) {
+          var found = getMarkedSpanFor(first, span.marker);
+          if (!found) {
+            span.from = offset;
+            if (sameLine) (first || (first = [])).push(span);
+          }
+        } else {
+          span.from += offset;
+          if (sameLine) (first || (first = [])).push(span);
+        }
+      }
+    }
+    // Make sure we didn't create any zero-length spans
+    if (first) first = clearEmptySpans(first);
+    if (last && last != first) last = clearEmptySpans(last);
+
+    var newMarkers = [first];
+    if (!sameLine) {
+      // Fill gap with whole-line-spans
+      var gap = change.text.length - 2, gapMarkers;
+      if (gap > 0 && first)
+        for (var i = 0; i < first.length; ++i)
+          if (first[i].to == null)
+            (gapMarkers || (gapMarkers = [])).push({from: null, to: null, marker: first[i].marker});
+      for (var i = 0; i < gap; ++i)
+        newMarkers.push(gapMarkers);
+      newMarkers.push(last);
+    }
+    return newMarkers;
+  }
+
+  function clearEmptySpans(spans) {
+    for (var i = 0; i < spans.length; ++i) {
+      var span = spans[i];
+      if (span.from != null && span.from == span.to && span.marker.clearWhenEmpty !== false)
+        spans.splice(i--, 1);
+    }
+    if (!spans.length) return null;
+    return spans;
+  }
+
+  function mergeOldSpans(doc, change) {
+    var old = getOldSpans(doc, change);
+    var stretched = stretchSpansOverChange(doc, change);
+    if (!old) return stretched;
+    if (!stretched) return old;
+
+    for (var i = 0; i < old.length; ++i) {
+      var oldCur = old[i], stretchCur = stretched[i];
+      if (oldCur && stretchCur) {
+        spans: for (var j = 0; j < stretchCur.length; ++j) {
+          var span = stretchCur[j];
+          for (var k = 0; k < oldCur.length; ++k)
+            if (oldCur[k].marker == span.marker) continue spans;
+          oldCur.push(span);
+        }
+      } else if (stretchCur) {
+        old[i] = stretchCur;
+      }
+    }
+    return old;
+  }
+
+  function removeReadOnlyRanges(doc, from, to) {
+    var markers = null;
+    doc.iter(from.line, to.line + 1, function(line) {
+      if (line.markedSpans) for (var i = 0; i < line.markedSpans.length; ++i) {
+        var mark = line.markedSpans[i].marker;
+        if (mark.readOnly && (!markers || indexOf(markers, mark) == -1))
+          (markers || (markers = [])).push(mark);
+      }
+    });
+    if (!markers) return null;
+    var parts = [{from: from, to: to}];
+    for (var i = 0; i < markers.length; ++i) {
+      var mk = markers[i], m = mk.find();
+      for (var j = 0; j < parts.length; ++j) {
+        var p = parts[j];
+        if (posLess(p.to, m.from) || posLess(m.to, p.from)) continue;
+        var newParts = [j, 1];
+        if (posLess(p.from, m.from) || !mk.inclusiveLeft && posEq(p.from, m.from))
+          newParts.push({from: p.from, to: m.from});
+        if (posLess(m.to, p.to) || !mk.inclusiveRight && posEq(p.to, m.to))
+          newParts.push({from: m.to, to: p.to});
+        parts.splice.apply(parts, newParts);
+        j += newParts.length - 1;
+      }
+    }
+    return parts;
+  }
+
+  function extraLeft(marker) { return marker.inclusiveLeft ? -1 : 0; }
+  function extraRight(marker) { return marker.inclusiveRight ? 1 : 0; }
+
+  function compareCollapsedMarkers(a, b) {
+    var lenDiff = a.lines.length - b.lines.length;
+    if (lenDiff != 0) return lenDiff;
+    var aPos = a.find(), bPos = b.find();
+    var fromCmp = cmp(aPos.from, bPos.from) || extraLeft(a) - extraLeft(b);
+    if (fromCmp) return -fromCmp;
+    var toCmp = cmp(aPos.to, bPos.to) || extraRight(a) - extraRight(b);
+    if (toCmp) return toCmp;
+    return b.id - a.id;
+  }
+
+  function collapsedSpanAtSide(line, start) {
+    var sps = sawCollapsedSpans && line.markedSpans, found;
+    if (sps) for (var sp, i = 0; i < sps.length; ++i) {
+      sp = sps[i];
+      if (sp.marker.collapsed && (start ? sp.from : sp.to) == null &&
+          (!found || compareCollapsedMarkers(found, sp.marker) < 0))
+        found = sp.marker;
+    }
+    return found;
+  }
+  function collapsedSpanAtStart(line) { return collapsedSpanAtSide(line, true); }
+  function collapsedSpanAtEnd(line) { return collapsedSpanAtSide(line, false); }
+
+  function conflictingCollapsedRange(doc, lineNo, from, to, marker) {
+    var line = getLine(doc, lineNo);
+    var sps = sawCollapsedSpans && line.markedSpans;
+    if (sps) for (var i = 0; i < sps.length; ++i) {
+      var sp = sps[i];
+      if (!sp.marker.collapsed) continue;
+      var found = sp.marker.find(true);
+      var fromCmp = cmp(found.from, from) || extraLeft(sp.marker) - extraLeft(marker);
+      var toCmp = cmp(found.to, to) || extraRight(sp.marker) - extraRight(marker);
+      if (fromCmp >= 0 && toCmp <= 0 || fromCmp <= 0 && toCmp >= 0) continue;
+      if (fromCmp <= 0 && (cmp(found.to, from) || extraRight(sp.marker) - extraLeft(marker)) > 0 ||
+          fromCmp >= 0 && (cmp(found.from, to) || extraLeft(sp.marker) - extraRight(marker)) < 0)
+        return true;
+    }
+  }
+
+  function visualLine(doc, line) {
+    var merged;
+    while (merged = collapsedSpanAtStart(line))
+      line = getLine(doc, merged.find().from.line);
+    return line;
+  }
+
+  function lineIsHidden(doc, line) {
+    var sps = sawCollapsedSpans && line.markedSpans;
+    if (sps) for (var sp, i = 0; i < sps.length; ++i) {
+      sp = sps[i];
+      if (!sp.marker.collapsed) continue;
+      if (sp.from == null) return true;
+      if (sp.marker.replacedWith) continue;
+      if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(doc, line, sp))
+        return true;
+    }
+  }
+  function lineIsHiddenInner(doc, line, span) {
+    if (span.to == null) {
+      var end = span.marker.find().to, endLine = getLine(doc, end.line);
+      return lineIsHiddenInner(doc, endLine, getMarkedSpanFor(endLine.markedSpans, span.marker));
+    }
+    if (span.marker.inclusiveRight && span.to == line.text.length)
+      return true;
+    for (var sp, i = 0; i < line.markedSpans.length; ++i) {
+      sp = line.markedSpans[i];
+      if (sp.marker.collapsed && !sp.marker.replacedWith && sp.from == span.to &&
+          (sp.to == null || sp.to != span.from) &&
+          (sp.marker.inclusiveLeft || span.marker.inclusiveRight) &&
+          lineIsHiddenInner(doc, line, sp)) return true;
+    }
+  }
+
+  function detachMarkedSpans(line) {
+    var spans = line.markedSpans;
+    if (!spans) return;
+    for (var i = 0; i < spans.length; ++i)
+      spans[i].marker.detachLine(line);
+    line.markedSpans = null;
+  }
+
+  function attachMarkedSpans(line, spans) {
+    if (!spans) return;
+    for (var i = 0; i < spans.length; ++i)
+      spans[i].marker.attachLine(line);
+    line.markedSpans = spans;
+  }
+
+  // LINE WIDGETS
+
+  var LineWidget = CodeMirror.LineWidget = function(cm, node, options) {
+    if (options) for (var opt in options) if (options.hasOwnProperty(opt))
+      this[opt] = options[opt];
+    this.cm = cm;
+    this.node = node;
+  };
+  eventMixin(LineWidget);
+  function widgetOperation(f) {
+    return function() {
+      var withOp = !this.cm.curOp;
+      if (withOp) startOperation(this.cm);
+      try {var result = f.apply(this, arguments);}
+      finally {if (withOp) endOperation(this.cm);}
+      return result;
+    };
+  }
+  LineWidget.prototype.clear = widgetOperation(function() {
+    var ws = this.line.widgets, no = lineNo(this.line);
+    if (no == null || !ws) return;
+    for (var i = 0; i < ws.length; ++i) if (ws[i] == this) ws.splice(i--, 1);
+    if (!ws.length) this.line.widgets = null;
+    var aboveVisible = heightAtLine(this.cm, this.line) < this.cm.doc.scrollTop;
+    updateLineHeight(this.line, Math.max(0, this.line.height - widgetHeight(this)));
+    if (aboveVisible) addToScrollPos(this.cm, 0, -this.height);
+    regChange(this.cm, no, no + 1);
+  });
+  LineWidget.prototype.changed = widgetOperation(function() {
+    var oldH = this.height;
+    this.height = null;
+    var diff = widgetHeight(this) - oldH;
+    if (!diff) return;
+    updateLineHeight(this.line, this.line.height + diff);
+    var no = lineNo(this.line);
+    regChange(this.cm, no, no + 1);
+  });
+
+  function widgetHeight(widget) {
+    if (widget.height != null) return widget.height;
+    if (!widget.node.parentNode || widget.node.parentNode.nodeType != 1)
+      removeChildrenAndAdd(widget.cm.display.measure, elt("div", [widget.node], null, "position: relative"));
+    return widget.height = widget.node.offsetHeight;
+  }
+
+  function addLineWidget(cm, handle, node, options) {
+    var widget = new LineWidget(cm, node, options);
+    if (widget.noHScroll) cm.display.alignWidgets = true;
+    changeLine(cm, handle, function(line) {
+      var widgets = line.widgets || (line.widgets = []);
+      if (widget.insertAt == null) widgets.push(widget);
+      else widgets.splice(Math.min(widgets.length - 1, Math.max(0, widget.insertAt)), 0, widget);
+      widget.line = line;
+      if (!lineIsHidden(cm.doc, line) || widget.showIfHidden) {
+        var aboveVisible = heightAtLine(cm, line) < cm.doc.scrollTop;
+        updateLineHeight(line, line.height + widgetHeight(widget));
+        if (aboveVisible) addToScrollPos(cm, 0, widget.height);
+      }
+      return true;
+    });
+    return widget;
+  }
+
+  // LINE DATA STRUCTURE
+
   // Line objects. These hold state related to a line, including
   // highlighting info (the styles array).
-  function Line(text, styles) {
-    this.styles = styles || [text, null];
+  var Line = CodeMirror.Line = function(text, markedSpans, estimateHeight) {
     this.text = text;
-    this.height = 1;
-    this.marked = this.gutterMarker = this.className = this.bgClassName = this.handlers = null;
-    this.stateAfter = this.parent = this.hidden = null;
-    this.widgetFunction = null;
-  }
-  Line.inheritMarks = function(text, orig) {
-    var ln = new Line(text), mk = orig && orig.marked;
-    if (mk) {
-      for (var i = 0; i < mk.length; ++i) {
-        if (mk[i].to == null && mk[i].style) {
-          var newmk = ln.marked || (ln.marked = []), mark = mk[i];
-          var nmark = mark.dup(); newmk.push(nmark); nmark.attach(ln);
-        }
-      }
-    }
-    return ln;
-  }
-  Line.prototype = {
-    // Replace a piece of a line, keeping the styles around it intact.
-    replace: function(from, to_, text) {
-      var st = [], mk = this.marked, to = to_ == null ? this.text.length : to_;
-      copyStyles(0, from, this.styles, st);
-      if (text) st.push(text, null);
-      copyStyles(to, this.text.length, this.styles, st);
-      this.styles = st;
-      this.text = this.text.slice(0, from) + text + this.text.slice(to);
-      this.stateAfter = null;
-      if (mk) {
-        var diff = text.length - (to - from);
-        for (var i = 0; i < mk.length; ++i) {
-          var mark = mk[i];
-          mark.clipTo(from == null, from || 0, to_ == null, to, diff);
-          if (mark.isDead()) {mark.detach(this); mk.splice(i--, 1);}
-        }
-      }
-    },
-    // Split a part off a line, keeping styles and markers intact.
-    split: function(pos, textBefore) {
-      var st = [textBefore, null], mk = this.marked;
-      copyStyles(pos, this.text.length, this.styles, st);
-      var taken = new Line(textBefore + this.text.slice(pos), st);
-      if (mk) {
-        for (var i = 0; i < mk.length; ++i) {
-          var mark = mk[i];
-          var newmark = mark.split(pos, textBefore.length);
-          if (newmark) {
-            if (!taken.marked) taken.marked = [];
-            taken.marked.push(newmark); newmark.attach(taken);
-            if (newmark == mark) mk.splice(i--, 1);
-          }
-        }
-      }
-      return taken;
-    },
-    append: function(line) {
-      var mylen = this.text.length, mk = line.marked, mymk = this.marked;
-      this.text += line.text;
-      copyStyles(0, line.text.length, line.styles, this.styles);
-      if (mymk) {
-        for (var i = 0; i < mymk.length; ++i)
-          if (mymk[i].to == null) mymk[i].to = mylen;
-      }
-      if (mk && mk.length) {
-        if (!mymk) this.marked = mymk = [];
-        outer: for (var i = 0; i < mk.length; ++i) {
-          var mark = mk[i];
-          if (!mark.from) {
-            for (var j = 0; j < mymk.length; ++j) {
-              var mymark = mymk[j];
-              if (mymark.to == mylen && mymark.sameSet(mark)) {
-                mymark.to = mark.to == null ? null : mark.to + mylen;
-                if (mymark.isDead()) {
-                  mymark.detach(this);
-                  mk.splice(i--, 1);
-                }
-                continue outer;
-              }
-            }
-          }
-          mymk.push(mark);
-          mark.attach(this);
-          mark.from += mylen;
-          if (mark.to != null) mark.to += mylen;
-        }
-      }
-    },
-    fixMarkEnds: function(other) {
-      var mk = this.marked, omk = other.marked;
-      if (!mk) return;
-      for (var i = 0; i < mk.length; ++i) {
-        var mark = mk[i], close = mark.to == null;
-        if (close && omk) {
-          for (var j = 0; j < omk.length; ++j)
-            if (omk[j].sameSet(mark)) {close = false; break;}
-        }
-        if (close) mark.to = this.text.length;
-      }
-    },
-    fixMarkStarts: function() {
-      var mk = this.marked;
-      if (!mk) return;
-      for (var i = 0; i < mk.length; ++i)
-        if (mk[i].from == null) mk[i].from = 0;
-    },
-    addMark: function(mark) {
-      mark.attach(this);
-      if (this.marked == null) this.marked = [];
-      this.marked.push(mark);
-      this.marked.sort(function(a, b){return (a.from || 0) - (b.from || 0);});
-    },
-    // Run the given mode's parser over a line, update the styles
-    // array, which contains alternating fragments of text and CSS
-    // classes.
-    highlight: function(mode, state, tabSize) {
-      var stream = new StringStream(this.text, tabSize), st = this.styles, pos = 0;
-      var changed = false, curWord = st[0], prevWord;
-      if (this.text == "" && mode.blankLine) mode.blankLine(state);
-      while (!stream.eol()) {
-        var style = mode.token(stream, state);
-        var substr = this.text.slice(stream.start, stream.pos);
-        stream.start = stream.pos;
-        if (pos && st[pos-1] == style)
-          st[pos-2] += substr;
-        else if (substr) {
-          if (!changed && (st[pos+1] != style || (pos && st[pos-2] != prevWord))) changed = true;
-          st[pos++] = substr; st[pos++] = style;
-          prevWord = curWord; curWord = st[pos];
-        }
-        // Give up when line is ridiculously long
-        if (stream.pos > 5000) {
-          st[pos++] = this.text.slice(stream.pos); st[pos++] = null;
-          break;
-        }
-      }
-      if (st.length != pos) {st.length = pos; changed = true;}
-      if (pos && st[pos-2] != prevWord) changed = true;
-      if (st.length == 2 && typeof st[1] == 'object') {
-        this.widgetFunction = st[1];
-        st[1] = null;
-      } else {
-        this.widgetFunction = null;
-      }
-      // Short lines with simple highlights return null, and are
-      // counted as changed by the driver because they are likely to
-      // highlight the same way in various contexts.
-      return changed || (st.length < 5 && this.text.length < 10 ? null : false);
-    },
-    nodeAdded: function(node) {
-      if (this.widgetFunction) this.widgetFunction.callback(node, this);
-    },
-    // Fetch the parser token for a given character. Useful for hacks
-    // that want to inspect the mode state (say, for completion).
-    getTokenAt: function(mode, state, ch) {
-      var txt = this.text, stream = new StringStream(txt);
-      while (stream.pos < ch && !stream.eol()) {
-        stream.start = stream.pos;
-        var style = mode.token(stream, state);
-      }
-      return {start: stream.start,
-              end: stream.pos,
-              string: stream.current(),
-              className: style || null,
-              state: state};
-    },
-    indentation: function(tabSize) {return countColumn(this.text, null, tabSize);},
-    // Produces an HTML fragment for the line, taking selection,
-    // marking, and highlighting into account.
-    getHTML: function(makeTab, endAt) {
-      var html = [], first = true, col = 0;
-      function span(text, style) {
-        if (!text) return;
-        // Work around a bug where, in some compat modes, IE ignores leading spaces
-        if (first && ie && text.charAt(0) == " ") text = "\u00a0" + text.slice(1);
-        first = false;
-        if (text.indexOf("\t") == -1) {
-          col += text.length;
-          var escaped = htmlEscape(text);
-        } else {
-          var escaped = "";
-          for (var pos = 0;;) {
-            var idx = text.indexOf("\t", pos);
-            if (idx == -1) {
-              escaped += htmlEscape(text.slice(pos));
-              col += text.length - pos;
-              break;
-            } else {
-              col += idx - pos;
-              var tab = makeTab(col);
-              escaped += htmlEscape(text.slice(pos, idx)) + tab.html;
-              col += tab.width;
-              pos = idx + 1;
-            }
-          }
-        }
-        if (style) html.push('', escaped, "");
-        else html.push(escaped);
-      }
-      var st = this.styles, allText = this.text, marked = this.marked;
-      var len = allText.length;
-      if (this.widgetFunction) return this.widgetFunction.creator(allText);
-      if (endAt != null) len = Math.min(endAt, len);
-      function styleToClass(style) {
-        if (!style) return null;
-        return "cm-" + style.replace(/ +/g, " cm-");
-      }
-
-      if (!allText && endAt == null)
-        span(" ");
-      else if (!marked || !marked.length)
-        for (var i = 0, ch = 0; ch < len; i+=2) {
-          var str = st[i], style = st[i+1], l = str.length;
-          if (ch + l > len) str = str.slice(0, len - ch);
-          ch += l;
-          span(str, styleToClass(style));
-        }
-      else {
-        var pos = 0, i = 0, text = "", style, sg = 0;
-        var nextChange = marked[0].from || 0, marks = [], markpos = 0;
-        function advanceMarks() {
-          var m;
-          while (markpos < marked.length &&
-                 ((m = marked[markpos]).from == pos || m.from == null)) {
-            if (m.style != null) marks.push(m);
-            ++markpos;
-          }
-          nextChange = markpos < marked.length ? marked[markpos].from : Infinity;
-          for (var i = 0; i < marks.length; ++i) {
-            var to = marks[i].to || Infinity;
-            if (to == pos) marks.splice(i--, 1);
-            else nextChange = Math.min(to, nextChange);
-          }
-        }
-        var m = 0;
-        while (pos < len) {
-          if (nextChange == pos) advanceMarks();
-          var upto = Math.min(len, nextChange);
-          while (true) {
-            if (text) {
-              var end = pos + text.length;
-              var appliedStyle = style;
-              for (var j = 0; j < marks.length; ++j)
-                appliedStyle = (appliedStyle ? appliedStyle + " " : "") + marks[j].style;
-              span(end > upto ? text.slice(0, upto - pos) : text, appliedStyle);
-              if (end >= upto) {text = text.slice(upto - pos); pos = upto; break;}
-              pos = end;
-            }
-            text = st[i++]; style = styleToClass(st[i++]);
-          }
-        }
-      }
-      return html.join("");
-    },
-    cleanUp: function() {
-      this.parent = null;
-      if (this.marked)
-        for (var i = 0, e = this.marked.length; i < e; ++i) this.marked[i].detach(this);
-    }
+    attachMarkedSpans(this, markedSpans);
+    this.height = estimateHeight ? estimateHeight(this) : 1;
   };
-  // Utility used by replace and split above
-  function copyStyles(from, to, source, dest) {
-    for (var i = 0, pos = 0, state = 0; pos < to; i+=2) {
-      var part = source[i], end = pos + part.length;
-      if (state == 0) {
-        if (end > from) dest.push(part.slice(from - pos, Math.min(part.length, to - pos)), source[i+1]);
-        if (end >= from) state = 1;
+  eventMixin(Line);
+  Line.prototype.lineNo = function() { return lineNo(this); };
+
+  function updateLine(line, text, markedSpans, estimateHeight) {
+    line.text = text;
+    if (line.stateAfter) line.stateAfter = null;
+    if (line.styles) line.styles = null;
+    if (line.order != null) line.order = null;
+    detachMarkedSpans(line);
+    attachMarkedSpans(line, markedSpans);
+    var estHeight = estimateHeight ? estimateHeight(line) : 1;
+    if (estHeight != line.height) updateLineHeight(line, estHeight);
+  }
+
+  function cleanUpLine(line) {
+    line.parent = null;
+    detachMarkedSpans(line);
+  }
+
+  // Run the given mode's parser over a line, update the styles
+  // array, which contains alternating fragments of text and CSS
+  // classes.
+  function runMode(cm, text, mode, state, f, forceToEnd) {
+    var flattenSpans = mode.flattenSpans;
+    if (flattenSpans == null) flattenSpans = cm.options.flattenSpans;
+    var curStart = 0, curStyle = null;
+    var stream = new StringStream(text, cm.options.tabSize), style;
+    if (text == "" && mode.blankLine) mode.blankLine(state);
+    while (!stream.eol()) {
+      if (stream.pos > cm.options.maxHighlightLength) {
+        flattenSpans = false;
+        if (forceToEnd) processLine(cm, text, state, stream.pos);
+        stream.pos = text.length;
+        style = null;
+      } else {
+        style = mode.token(stream, state);
       }
-      else if (state == 1) {
-        if (end > to) dest.push(part.slice(0, to - pos), source[i+1]);
-        else dest.push(part, source[i+1]);
+      if (cm.options.addModeClass) {
+        var mName = CodeMirror.innerMode(mode, state).mode.name;
+        if (mName) style = "m-" + (style ? mName + " " + style : mName);
       }
-      pos = end;
+      if (!flattenSpans || curStyle != style) {
+        if (curStart < stream.start) f(stream.start, curStyle);
+        curStart = stream.start; curStyle = style;
+      }
+      stream.start = stream.pos;
+    }
+    while (curStart < stream.pos) {
+      // Webkit seems to refuse to render text nodes longer than 57444 characters
+      var pos = Math.min(stream.pos, curStart + 50000);
+      f(pos, curStyle);
+      curStart = pos;
     }
   }
 
-  // Data structure that holds the sequence of lines.
+  function highlightLine(cm, line, state, forceToEnd) {
+    // A styles array always starts with a number identifying the
+    // mode/overlays that it is based on (for easy invalidation).
+    var st = [cm.state.modeGen];
+    // Compute the base array of styles
+    runMode(cm, line.text, cm.doc.mode, state, function(end, style) {
+      st.push(end, style);
+    }, forceToEnd);
+
+    // Run overlays, adjust style array.
+    for (var o = 0; o < cm.state.overlays.length; ++o) {
+      var overlay = cm.state.overlays[o], i = 1, at = 0;
+      runMode(cm, line.text, overlay.mode, true, function(end, style) {
+        var start = i;
+        // Ensure there's a token end at the current position, and that i points at it
+        while (at < end) {
+          var i_end = st[i];
+          if (i_end > end)
+            st.splice(i, 1, end, st[i+1], i_end);
+          i += 2;
+          at = Math.min(end, i_end);
+        }
+        if (!style) return;
+        if (overlay.opaque) {
+          st.splice(start, i - start, end, style);
+          i = start + 2;
+        } else {
+          for (; start < i; start += 2) {
+            var cur = st[start+1];
+            st[start+1] = cur ? cur + " " + style : style;
+          }
+        }
+      });
+    }
+
+    return st;
+  }
+
+  function getLineStyles(cm, line) {
+    if (!line.styles || line.styles[0] != cm.state.modeGen)
+      line.styles = highlightLine(cm, line, line.stateAfter = getStateBefore(cm, lineNo(line)));
+    return line.styles;
+  }
+
+  // Lightweight form of highlight -- proceed over this line and
+  // update state, but don't save a style array.
+  function processLine(cm, text, state, startAt) {
+    var mode = cm.doc.mode;
+    var stream = new StringStream(text, cm.options.tabSize);
+    stream.start = stream.pos = startAt || 0;
+    if (text == "" && mode.blankLine) mode.blankLine(state);
+    while (!stream.eol() && stream.pos <= cm.options.maxHighlightLength) {
+      mode.token(stream, state);
+      stream.start = stream.pos;
+    }
+  }
+
+  var styleToClassCache = {}, styleToClassCacheWithMode = {};
+  function interpretTokenStyle(style, builder) {
+    if (!style) return null;
+    for (;;) {
+      var lineClass = style.match(/(?:^|\s)line-(background-)?(\S+)/);
+      if (!lineClass) break;
+      style = style.slice(0, lineClass.index) + style.slice(lineClass.index + lineClass[0].length);
+      var prop = lineClass[1] ? "bgClass" : "textClass";
+      if (builder[prop] == null)
+        builder[prop] = lineClass[2];
+      else if (!(new RegExp("(?:^|\s)" + lineClass[2] + "(?:$|\s)")).test(builder[prop]))
+        builder[prop] += " " + lineClass[2];
+    }
+    var cache = builder.cm.options.addModeClass ? styleToClassCacheWithMode : styleToClassCache;
+    return cache[style] ||
+      (cache[style] = "cm-" + style.replace(/ +/g, " cm-"));
+  }
+
+  function buildLineContent(cm, realLine, measure, copyWidgets) {
+    var merged, line = realLine, empty = true;
+    while (merged = collapsedSpanAtStart(line))
+      line = getLine(cm.doc, merged.find().from.line);
+
+    var builder = {pre: elt("pre"), col: 0, pos: 0,
+                   measure: null, measuredSomething: false, cm: cm,
+                   copyWidgets: copyWidgets};
+
+    do {
+      if (line.text) empty = false;
+      builder.measure = line == realLine && measure;
+      builder.pos = 0;
+      builder.addToken = builder.measure ? buildTokenMeasure : buildToken;
+      if ((old_ie || webkit) && cm.getOption("lineWrapping"))
+        builder.addToken = buildTokenSplitSpaces(builder.addToken);
+      var next = insertLineContent(line, builder, getLineStyles(cm, line));
+      if (measure && line == realLine && !builder.measuredSomething) {
+        measure[0] = builder.pre.appendChild(zeroWidthElement(cm.display.measure));
+        builder.measuredSomething = true;
+      }
+      if (next) line = getLine(cm.doc, next.to.line);
+    } while (next);
+
+    if (measure && !builder.measuredSomething && !measure[0])
+      measure[0] = builder.pre.appendChild(empty ? elt("span", "\u00a0") : zeroWidthElement(cm.display.measure));
+    if (!builder.pre.firstChild && !lineIsHidden(cm.doc, realLine))
+      builder.pre.appendChild(document.createTextNode("\u00a0"));
+
+    var order;
+    // Work around problem with the reported dimensions of single-char
+    // direction spans on IE (issue #1129). See also the comment in
+    // cursorCoords.
+    if (measure && ie && (order = getOrder(line))) {
+      var l = order.length - 1;
+      if (order[l].from == order[l].to) --l;
+      var last = order[l], prev = order[l - 1];
+      if (last.from + 1 == last.to && prev && last.level < prev.level) {
+        var span = measure[builder.pos - 1];
+        if (span) span.parentNode.insertBefore(span.measureRight = zeroWidthElement(cm.display.measure),
+                                               span.nextSibling);
+      }
+    }
+
+    var textClass = builder.textClass ? builder.textClass + " " + (realLine.textClass || "") : realLine.textClass;
+    if (textClass) builder.pre.className = textClass;
+
+    signal(cm, "renderLine", cm, realLine, builder.pre);
+    return builder;
+  }
+
+  function defaultSpecialCharPlaceholder(ch) {
+    var token = elt("span", "\u2022", "cm-invalidchar");
+    token.title = "\\u" + ch.charCodeAt(0).toString(16);
+    return token;
+  }
+
+  function buildToken(builder, text, style, startStyle, endStyle, title) {
+    if (!text) return;
+    var special = builder.cm.options.specialChars;
+    if (!special.test(text)) {
+      builder.col += text.length;
+      var content = document.createTextNode(text);
+    } else {
+      var content = document.createDocumentFragment(), pos = 0;
+      while (true) {
+        special.lastIndex = pos;
+        var m = special.exec(text);
+        var skipped = m ? m.index - pos : text.length - pos;
+        if (skipped) {
+          content.appendChild(document.createTextNode(text.slice(pos, pos + skipped)));
+          builder.col += skipped;
+        }
+        if (!m) break;
+        pos += skipped + 1;
+        if (m[0] == "\t") {
+          var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize;
+          content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab"));
+          builder.col += tabWidth;
+        } else {
+          var token = builder.cm.options.specialCharPlaceholder(m[0]);
+          content.appendChild(token);
+          builder.col += 1;
+        }
+      }
+    }
+    if (style || startStyle || endStyle || builder.measure) {
+      var fullStyle = style || "";
+      if (startStyle) fullStyle += startStyle;
+      if (endStyle) fullStyle += endStyle;
+      var token = elt("span", [content], fullStyle);
+      if (title) token.title = title;
+      return builder.pre.appendChild(token);
+    }
+    builder.pre.appendChild(content);
+  }
+
+  function buildTokenMeasure(builder, text, style, startStyle, endStyle) {
+    var wrapping = builder.cm.options.lineWrapping;
+    for (var i = 0; i < text.length; ++i) {
+      var start = i == 0, to = i + 1;
+      while (to < text.length && isExtendingChar(text.charAt(to))) ++to;
+      var ch = text.slice(i, to);
+      i = to - 1;
+      if (i && wrapping && spanAffectsWrapping(text, i))
+        builder.pre.appendChild(elt("wbr"));
+      var old = builder.measure[builder.pos];
+      var span = builder.measure[builder.pos] =
+        buildToken(builder, ch, style,
+                   start && startStyle, i == text.length - 1 && endStyle);
+      if (old) span.leftSide = old.leftSide || old;
+      // In IE single-space nodes wrap differently than spaces
+      // embedded in larger text nodes, except when set to
+      // white-space: normal (issue #1268).
+      if (old_ie && wrapping && ch == " " && i && !/\s/.test(text.charAt(i - 1)) &&
+          i < text.length - 1 && !/\s/.test(text.charAt(i + 1)))
+        span.style.whiteSpace = "normal";
+      builder.pos += ch.length;
+    }
+    if (text.length) builder.measuredSomething = true;
+  }
+
+  function buildTokenSplitSpaces(inner) {
+    function split(old) {
+      var out = " ";
+      for (var i = 0; i < old.length - 2; ++i) out += i % 2 ? " " : "\u00a0";
+      out += " ";
+      return out;
+    }
+    return function(builder, text, style, startStyle, endStyle, title) {
+      return inner(builder, text.replace(/ {3,}/g, split), style, startStyle, endStyle, title);
+    };
+  }
+
+  function buildCollapsedSpan(builder, size, marker, ignoreWidget) {
+    var widget = !ignoreWidget && marker.replacedWith;
+    if (widget) {
+      if (builder.copyWidgets) widget = widget.cloneNode(true);
+      builder.pre.appendChild(widget);
+      if (builder.measure) {
+        if (size) {
+          builder.measure[builder.pos] = widget;
+        } else {
+          var elt = zeroWidthElement(builder.cm.display.measure);
+          if (marker.type == "bookmark" && !marker.insertLeft)
+            builder.measure[builder.pos] = builder.pre.appendChild(elt);
+          else if (builder.measure[builder.pos])
+            return;
+          else
+            builder.measure[builder.pos] = builder.pre.insertBefore(elt, widget);
+        }
+        builder.measuredSomething = true;
+      }
+    }
+    builder.pos += size;
+  }
+
+  // Outputs a number of spans to make up a line, taking highlighting
+  // and marked text into account.
+  function insertLineContent(line, builder, styles) {
+    var spans = line.markedSpans, allText = line.text, at = 0;
+    if (!spans) {
+      for (var i = 1; i < styles.length; i+=2)
+        builder.addToken(builder, allText.slice(at, at = styles[i]), interpretTokenStyle(styles[i+1], builder));
+      return;
+    }
+
+    var len = allText.length, pos = 0, i = 1, text = "", style;
+    var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, title, collapsed;
+    for (;;) {
+      if (nextChange == pos) { // Update current marker set
+        spanStyle = spanEndStyle = spanStartStyle = title = "";
+        collapsed = null; nextChange = Infinity;
+        var foundBookmarks = [];
+        for (var j = 0; j < spans.length; ++j) {
+          var sp = spans[j], m = sp.marker;
+          if (sp.from <= pos && (sp.to == null || sp.to > pos)) {
+            if (sp.to != null && nextChange > sp.to) { nextChange = sp.to; spanEndStyle = ""; }
+            if (m.className) spanStyle += " " + m.className;
+            if (m.startStyle && sp.from == pos) spanStartStyle += " " + m.startStyle;
+            if (m.endStyle && sp.to == nextChange) spanEndStyle += " " + m.endStyle;
+            if (m.title && !title) title = m.title;
+            if (m.collapsed && (!collapsed || compareCollapsedMarkers(collapsed.marker, m) < 0))
+              collapsed = sp;
+          } else if (sp.from > pos && nextChange > sp.from) {
+            nextChange = sp.from;
+          }
+          if (m.type == "bookmark" && sp.from == pos && m.replacedWith) foundBookmarks.push(m);
+        }
+        if (collapsed && (collapsed.from || 0) == pos) {
+          buildCollapsedSpan(builder, (collapsed.to == null ? len : collapsed.to) - pos,
+                             collapsed.marker, collapsed.from == null);
+          if (collapsed.to == null) return collapsed.marker.find();
+        }
+        if (!collapsed && foundBookmarks.length) for (var j = 0; j < foundBookmarks.length; ++j)
+          buildCollapsedSpan(builder, 0, foundBookmarks[j]);
+      }
+      if (pos >= len) break;
+
+      var upto = Math.min(len, nextChange);
+      while (true) {
+        if (text) {
+          var end = pos + text.length;
+          if (!collapsed) {
+            var tokenText = end > upto ? text.slice(0, upto - pos) : text;
+            builder.addToken(builder, tokenText, style ? style + spanStyle : spanStyle,
+                             spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "", title);
+          }
+          if (end >= upto) {text = text.slice(upto - pos); pos = upto; break;}
+          pos = end;
+          spanStartStyle = "";
+        }
+        text = allText.slice(at, at = styles[i++]);
+        style = interpretTokenStyle(styles[i++], builder);
+      }
+    }
+  }
+
+  // DOCUMENT DATA STRUCTURE
+
+  function updateDoc(doc, change, markedSpans, selAfter, estimateHeight) {
+    function spansFor(n) {return markedSpans ? markedSpans[n] : null;}
+    function update(line, text, spans) {
+      updateLine(line, text, spans, estimateHeight);
+      signalLater(line, "change", line, change);
+    }
+
+    var from = change.from, to = change.to, text = change.text;
+    var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line);
+    var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to.line - from.line;
+
+    // First adjust the line structure
+    if (from.ch == 0 && to.ch == 0 && lastText == "" &&
+        (!doc.cm || doc.cm.options.wholeLineUpdateBefore)) {
+      // This is a whole-line replace. Treated specially to make
+      // sure line objects move the way they are supposed to.
+      for (var i = 0, e = text.length - 1, added = []; i < e; ++i)
+        added.push(new Line(text[i], spansFor(i), estimateHeight));
+      update(lastLine, lastLine.text, lastSpans);
+      if (nlines) doc.remove(from.line, nlines);
+      if (added.length) doc.insert(from.line, added);
+    } else if (firstLine == lastLine) {
+      if (text.length == 1) {
+        update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLine.text.slice(to.ch), lastSpans);
+      } else {
+        for (var added = [], i = 1, e = text.length - 1; i < e; ++i)
+          added.push(new Line(text[i], spansFor(i), estimateHeight));
+        added.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, estimateHeight));
+        update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
+        doc.insert(from.line + 1, added);
+      }
+    } else if (text.length == 1) {
+      update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.text.slice(to.ch), spansFor(0));
+      doc.remove(from.line + 1, nlines);
+    } else {
+      update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
+      update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans);
+      for (var i = 1, e = text.length - 1, added = []; i < e; ++i)
+        added.push(new Line(text[i], spansFor(i), estimateHeight));
+      if (nlines > 1) doc.remove(from.line + 1, nlines - 1);
+      doc.insert(from.line + 1, added);
+    }
+
+    signalLater(doc, "change", doc, change);
+    setSelection(doc, selAfter.anchor, selAfter.head, null, true);
+  }
+
   function LeafChunk(lines) {
     this.lines = lines;
     this.parent = null;
@@ -2574,24 +4794,24 @@ var CodeMirror = (function() {
     }
     this.height = height;
   }
+
   LeafChunk.prototype = {
     chunkSize: function() { return this.lines.length; },
-    remove: function(at, n, callbacks) {
+    removeInner: function(at, n) {
       for (var i = at, e = at + n; i < e; ++i) {
         var line = this.lines[i];
         this.height -= line.height;
-        line.cleanUp();
-        if (line.handlers)
-          for (var j = 0; j < line.handlers.length; ++j) callbacks.push(line.handlers[j]);
+        cleanUpLine(line);
+        signalLater(line, "delete");
       }
       this.lines.splice(at, n);
     },
     collapse: function(lines) {
       lines.splice.apply(lines, [lines.length, 0].concat(this.lines));
     },
-    insertHeight: function(at, lines, height) {
+    insertInner: function(at, lines, height) {
       this.height += height;
-      this.lines.splice.apply(this.lines, [at, 0].concat(lines));
+      this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice(at));
       for (var i = 0, e = lines.length; i < e; ++i) lines[i].parent = this;
     },
     iterN: function(at, n, op) {
@@ -2599,6 +4819,7 @@ var CodeMirror = (function() {
         if (op(this.lines[at])) return true;
     }
   };
+
   function BranchChunk(children) {
     this.children = children;
     var size = 0, height = 0;
@@ -2611,15 +4832,16 @@ var CodeMirror = (function() {
     this.height = height;
     this.parent = null;
   }
+
   BranchChunk.prototype = {
     chunkSize: function() { return this.size; },
-    remove: function(at, n, callbacks) {
+    removeInner: function(at, n) {
       this.size -= n;
       for (var i = 0; i < this.children.length; ++i) {
         var child = this.children[i], sz = child.chunkSize();
         if (at < sz) {
           var rm = Math.min(n, sz - at), oldHeight = child.height;
-          child.remove(at, rm, callbacks);
+          child.removeInner(at, rm);
           this.height -= oldHeight - child.height;
           if (sz == rm) { this.children.splice(i--, 1); child.parent = null; }
           if ((n -= rm) == 0) break;
@@ -2636,18 +4858,13 @@ var CodeMirror = (function() {
     collapse: function(lines) {
       for (var i = 0, e = this.children.length; i < e; ++i) this.children[i].collapse(lines);
     },
-    insert: function(at, lines) {
-      var height = 0;
-      for (var i = 0, e = lines.length; i < e; ++i) height += lines[i].height;
-      this.insertHeight(at, lines, height);
-    },
-    insertHeight: function(at, lines, height) {
+    insertInner: function(at, lines, height) {
       this.size += lines.length;
       this.height += height;
       for (var i = 0, e = this.children.length; i < e; ++i) {
         var child = this.children[i], sz = child.chunkSize();
         if (at <= sz) {
-          child.insertHeight(at, lines, height);
+          child.insertInner(at, lines, height);
           if (child.lines && child.lines.length > 50) {
             while (child.lines.length > 50) {
               var spilled = child.lines.splice(child.lines.length - 25, 25);
@@ -2684,7 +4901,6 @@ var CodeMirror = (function() {
       } while (me.children.length > 10);
       me.parent.maybeSpill();
     },
-    iter: function(from, to, op) { this.iterN(from, to - from, op); },
     iterN: function(at, n, op) {
       for (var i = 0, e = this.children.length; i < e; ++i) {
         var child = this.children[i], sz = child.chunkSize();
@@ -2698,7 +4914,284 @@ var CodeMirror = (function() {
     }
   };
 
-  function getLineAt(chunk, n) {
+  var nextDocId = 0;
+  var Doc = CodeMirror.Doc = function(text, mode, firstLine) {
+    if (!(this instanceof Doc)) return new Doc(text, mode, firstLine);
+    if (firstLine == null) firstLine = 0;
+
+    BranchChunk.call(this, [new LeafChunk([new Line("", null)])]);
+    this.first = firstLine;
+    this.scrollTop = this.scrollLeft = 0;
+    this.cantEdit = false;
+    this.history = makeHistory();
+    this.cleanGeneration = 1;
+    this.frontier = firstLine;
+    var start = Pos(firstLine, 0);
+    this.sel = {from: start, to: start, head: start, anchor: start, shift: false, extend: false, goalColumn: null};
+    this.id = ++nextDocId;
+    this.modeOption = mode;
+
+    if (typeof text == "string") text = splitLines(text);
+    updateDoc(this, {from: start, to: start, text: text}, null, {head: start, anchor: start});
+  };
+
+  Doc.prototype = createObj(BranchChunk.prototype, {
+    constructor: Doc,
+    iter: function(from, to, op) {
+      if (op) this.iterN(from - this.first, to - from, op);
+      else this.iterN(this.first, this.first + this.size, from);
+    },
+
+    insert: function(at, lines) {
+      var height = 0;
+      for (var i = 0, e = lines.length; i < e; ++i) height += lines[i].height;
+      this.insertInner(at - this.first, lines, height);
+    },
+    remove: function(at, n) { this.removeInner(at - this.first, n); },
+
+    getValue: function(lineSep) {
+      var lines = getLines(this, this.first, this.first + this.size);
+      if (lineSep === false) return lines;
+      return lines.join(lineSep || "\n");
+    },
+    setValue: function(code) {
+      var top = Pos(this.first, 0), last = this.first + this.size - 1;
+      makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length),
+                        text: splitLines(code), origin: "setValue"},
+                 {head: top, anchor: top}, true);
+    },
+    replaceRange: function(code, from, to, origin) {
+      from = clipPos(this, from);
+      to = to ? clipPos(this, to) : from;
+      replaceRange(this, code, from, to, origin);
+    },
+    getRange: function(from, to, lineSep) {
+      var lines = getBetween(this, clipPos(this, from), clipPos(this, to));
+      if (lineSep === false) return lines;
+      return lines.join(lineSep || "\n");
+    },
+
+    getLine: function(line) {var l = this.getLineHandle(line); return l && l.text;},
+    setLine: function(line, text) {
+      if (isLine(this, line))
+        replaceRange(this, text, Pos(line, 0), clipPos(this, Pos(line)));
+    },
+    removeLine: function(line) {
+      if (line) replaceRange(this, "", clipPos(this, Pos(line - 1)), clipPos(this, Pos(line)));
+      else replaceRange(this, "", Pos(0, 0), clipPos(this, Pos(1, 0)));
+    },
+
+    getLineHandle: function(line) {if (isLine(this, line)) return getLine(this, line);},
+    getLineNumber: function(line) {return lineNo(line);},
+
+    getLineHandleVisualStart: function(line) {
+      if (typeof line == "number") line = getLine(this, line);
+      return visualLine(this, line);
+    },
+
+    lineCount: function() {return this.size;},
+    firstLine: function() {return this.first;},
+    lastLine: function() {return this.first + this.size - 1;},
+
+    clipPos: function(pos) {return clipPos(this, pos);},
+
+    getCursor: function(start) {
+      var sel = this.sel, pos;
+      if (start == null || start == "head") pos = sel.head;
+      else if (start == "anchor") pos = sel.anchor;
+      else if (start == "end" || start === false) pos = sel.to;
+      else pos = sel.from;
+      return copyPos(pos);
+    },
+    somethingSelected: function() {return !posEq(this.sel.head, this.sel.anchor);},
+
+    setCursor: docOperation(function(line, ch, extend) {
+      var pos = clipPos(this, typeof line == "number" ? Pos(line, ch || 0) : line);
+      if (extend) extendSelection(this, pos);
+      else setSelection(this, pos, pos);
+    }),
+    setSelection: docOperation(function(anchor, head, bias) {
+      setSelection(this, clipPos(this, anchor), clipPos(this, head || anchor), bias);
+    }),
+    extendSelection: docOperation(function(from, to, bias) {
+      extendSelection(this, clipPos(this, from), to && clipPos(this, to), bias);
+    }),
+
+    getSelection: function(lineSep) {return this.getRange(this.sel.from, this.sel.to, lineSep);},
+    replaceSelection: function(code, collapse, origin) {
+      makeChange(this, {from: this.sel.from, to: this.sel.to, text: splitLines(code), origin: origin}, collapse || "around");
+    },
+    undo: docOperation(function() {makeChangeFromHistory(this, "undo");}),
+    redo: docOperation(function() {makeChangeFromHistory(this, "redo");}),
+
+    setExtending: function(val) {this.sel.extend = val;},
+
+    historySize: function() {
+      var hist = this.history;
+      return {undo: hist.done.length, redo: hist.undone.length};
+    },
+    clearHistory: function() {this.history = makeHistory(this.history.maxGeneration);},
+
+    markClean: function() {
+      this.cleanGeneration = this.changeGeneration(true);
+    },
+    changeGeneration: function(forceSplit) {
+      if (forceSplit)
+        this.history.lastOp = this.history.lastOrigin = null;
+      return this.history.generation;
+    },
+    isClean: function (gen) {
+      return this.history.generation == (gen || this.cleanGeneration);
+    },
+
+    getHistory: function() {
+      return {done: copyHistoryArray(this.history.done),
+              undone: copyHistoryArray(this.history.undone)};
+    },
+    setHistory: function(histData) {
+      var hist = this.history = makeHistory(this.history.maxGeneration);
+      hist.done = histData.done.slice(0);
+      hist.undone = histData.undone.slice(0);
+    },
+
+    markText: function(from, to, options) {
+      return markText(this, clipPos(this, from), clipPos(this, to), options, "range");
+    },
+    setBookmark: function(pos, options) {
+      var realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options),
+                      insertLeft: options && options.insertLeft,
+                      clearWhenEmpty: false};
+      pos = clipPos(this, pos);
+      return markText(this, pos, pos, realOpts, "bookmark");
+    },
+    findMarksAt: function(pos) {
+      pos = clipPos(this, pos);
+      var markers = [], spans = getLine(this, pos.line).markedSpans;
+      if (spans) for (var i = 0; i < spans.length; ++i) {
+        var span = spans[i];
+        if ((span.from == null || span.from <= pos.ch) &&
+            (span.to == null || span.to >= pos.ch))
+          markers.push(span.marker.parent || span.marker);
+      }
+      return markers;
+    },
+    getAllMarks: function() {
+      var markers = [];
+      this.iter(function(line) {
+        var sps = line.markedSpans;
+        if (sps) for (var i = 0; i < sps.length; ++i)
+          if (sps[i].from != null) markers.push(sps[i].marker);
+      });
+      return markers;
+    },
+
+    posFromIndex: function(off) {
+      var ch, lineNo = this.first;
+      this.iter(function(line) {
+        var sz = line.text.length + 1;
+        if (sz > off) { ch = off; return true; }
+        off -= sz;
+        ++lineNo;
+      });
+      return clipPos(this, Pos(lineNo, ch));
+    },
+    indexFromPos: function (coords) {
+      coords = clipPos(this, coords);
+      var index = coords.ch;
+      if (coords.line < this.first || coords.ch < 0) return 0;
+      this.iter(this.first, coords.line, function (line) {
+        index += line.text.length + 1;
+      });
+      return index;
+    },
+
+    copy: function(copyHistory) {
+      var doc = new Doc(getLines(this, this.first, this.first + this.size), this.modeOption, this.first);
+      doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft;
+      doc.sel = {from: this.sel.from, to: this.sel.to, head: this.sel.head, anchor: this.sel.anchor,
+                 shift: this.sel.shift, extend: false, goalColumn: this.sel.goalColumn};
+      if (copyHistory) {
+        doc.history.undoDepth = this.history.undoDepth;
+        doc.setHistory(this.getHistory());
+      }
+      return doc;
+    },
+
+    linkedDoc: function(options) {
+      if (!options) options = {};
+      var from = this.first, to = this.first + this.size;
+      if (options.from != null && options.from > from) from = options.from;
+      if (options.to != null && options.to < to) to = options.to;
+      var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from);
+      if (options.sharedHist) copy.history = this.history;
+      (this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.sharedHist});
+      copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}];
+      return copy;
+    },
+    unlinkDoc: function(other) {
+      if (other instanceof CodeMirror) other = other.doc;
+      if (this.linked) for (var i = 0; i < this.linked.length; ++i) {
+        var link = this.linked[i];
+        if (link.doc != other) continue;
+        this.linked.splice(i, 1);
+        other.unlinkDoc(this);
+        break;
+      }
+      // If the histories were shared, split them again
+      if (other.history == this.history) {
+        var splitIds = [other.id];
+        linkedDocs(other, function(doc) {splitIds.push(doc.id);}, true);
+        other.history = makeHistory();
+        other.history.done = copyHistoryArray(this.history.done, splitIds);
+        other.history.undone = copyHistoryArray(this.history.undone, splitIds);
+      }
+    },
+    iterLinkedDocs: function(f) {linkedDocs(this, f);},
+
+    getMode: function() {return this.mode;},
+    getEditor: function() {return this.cm;}
+  });
+
+  Doc.prototype.eachLine = Doc.prototype.iter;
+
+  // The Doc methods that should be available on CodeMirror instances
+  var dontDelegate = "iter insert remove copy getEditor".split(" ");
+  for (var prop in Doc.prototype) if (Doc.prototype.hasOwnProperty(prop) && indexOf(dontDelegate, prop) < 0)
+    CodeMirror.prototype[prop] = (function(method) {
+      return function() {return method.apply(this.doc, arguments);};
+    })(Doc.prototype[prop]);
+
+  eventMixin(Doc);
+
+  function linkedDocs(doc, f, sharedHistOnly) {
+    function propagate(doc, skip, sharedHist) {
+      if (doc.linked) for (var i = 0; i < doc.linked.length; ++i) {
+        var rel = doc.linked[i];
+        if (rel.doc == skip) continue;
+        var shared = sharedHist && rel.sharedHist;
+        if (sharedHistOnly && !shared) continue;
+        f(rel.doc, shared);
+        propagate(rel.doc, doc, shared);
+      }
+    }
+    propagate(doc, null, true);
+  }
+
+  function attachDoc(cm, doc) {
+    if (doc.cm) throw new Error("This document is already in use.");
+    cm.doc = doc;
+    doc.cm = cm;
+    estimateLineHeights(cm);
+    loadMode(cm);
+    if (!cm.options.lineWrapping) computeMaxLength(cm);
+    cm.options.mode = doc.modeOption;
+    regChange(cm);
+  }
+
+  // LINE UTILITIES
+
+  function getLine(chunk, n) {
+    n -= chunk.first;
     while (!chunk.lines) {
       for (var i = 0;; ++i) {
         var child = chunk.children[i], sz = child.chunkSize();
@@ -2708,19 +5201,43 @@ var CodeMirror = (function() {
     }
     return chunk.lines[n];
   }
+
+  function getBetween(doc, start, end) {
+    var out = [], n = start.line;
+    doc.iter(start.line, end.line + 1, function(line) {
+      var text = line.text;
+      if (n == end.line) text = text.slice(0, end.ch);
+      if (n == start.line) text = text.slice(start.ch);
+      out.push(text);
+      ++n;
+    });
+    return out;
+  }
+  function getLines(doc, from, to) {
+    var out = [];
+    doc.iter(from, to, function(line) { out.push(line.text); });
+    return out;
+  }
+
+  function updateLineHeight(line, height) {
+    var diff = height - line.height;
+    for (var n = line; n; n = n.parent) n.height += diff;
+  }
+
   function lineNo(line) {
     if (line.parent == null) return null;
     var cur = line.parent, no = indexOf(cur.lines, line);
     for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {
-      for (var i = 0, e = chunk.children.length; ; ++i) {
+      for (var i = 0;; ++i) {
         if (chunk.children[i] == cur) break;
         no += chunk.children[i].chunkSize();
       }
     }
-    return no;
+    return no + cur.first;
   }
+
   function lineAtHeight(chunk, h) {
-    var n = 0;
+    var n = chunk.first;
     outer: do {
       for (var i = 0, e = chunk.children.length; i < e; ++i) {
         var child = chunk.children[i], ch = child.height;
@@ -2737,55 +5254,194 @@ var CodeMirror = (function() {
     }
     return n + i;
   }
-  function heightAtLine(chunk, n) {
-    var h = 0;
-    outer: do {
-      for (var i = 0, e = chunk.children.length; i < e; ++i) {
-        var child = chunk.children[i], sz = child.chunkSize();
-        if (n < sz) { chunk = child; continue outer; }
-        n -= sz;
-        h += child.height;
+
+  function heightAtLine(cm, lineObj) {
+    lineObj = visualLine(cm.doc, lineObj);
+
+    var h = 0, chunk = lineObj.parent;
+    for (var i = 0; i < chunk.lines.length; ++i) {
+      var line = chunk.lines[i];
+      if (line == lineObj) break;
+      else h += line.height;
+    }
+    for (var p = chunk.parent; p; chunk = p, p = chunk.parent) {
+      for (var i = 0; i < p.children.length; ++i) {
+        var cur = p.children[i];
+        if (cur == chunk) break;
+        else h += cur.height;
       }
-      return h;
-    } while (!chunk.lines);
-    for (var i = 0; i < n; ++i) h += chunk.lines[i].height;
+    }
     return h;
   }
 
-  // The history object 'chunks' changes that are made close together
-  // and at almost the same time into bigger undoable units.
-  function History() {
-    this.time = 0;
-    this.done = []; this.undone = [];
+  function getOrder(line) {
+    var order = line.order;
+    if (order == null) order = line.order = bidiOrdering(line.text);
+    return order;
   }
-  History.prototype = {
-    addChange: function(start, added, old) {
-      this.undone.length = 0;
-      var time = +new Date, cur = this.done[this.done.length - 1], last = cur && cur[cur.length - 1];
-      var dtime = time - this.time;
-      if (dtime > 400 || !last) {
-        this.done.push([{start: start, added: added, old: old}]);
-      } else if (last.start > start + old.length || last.start + last.added < start - last.added + last.old.length) {
-        cur.push({start: start, added: added, old: old});
+
+  // HISTORY
+
+  function makeHistory(startGen) {
+    return {
+      // Arrays of history events. Doing something adds an event to
+      // done and clears undo. Undoing moves events from done to
+      // undone, redoing moves them in the other direction.
+      done: [], undone: [], undoDepth: Infinity,
+      // Used to track when changes can be merged into a single undo
+      // event
+      lastTime: 0, lastOp: null, lastOrigin: null,
+      // Used by the isClean() method
+      generation: startGen || 1, maxGeneration: startGen || 1
+    };
+  }
+
+  function attachLocalSpans(doc, change, from, to) {
+    var existing = change["spans_" + doc.id], n = 0;
+    doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), function(line) {
+      if (line.markedSpans)
+        (existing || (existing = change["spans_" + doc.id] = {}))[n] = line.markedSpans;
+      ++n;
+    });
+  }
+
+  function historyChangeFromChange(doc, change) {
+    var from = { line: change.from.line, ch: change.from.ch };
+    var histChange = {from: from, to: changeEnd(change), text: getBetween(doc, change.from, change.to)};
+    attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);
+    linkedDocs(doc, function(doc) {attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);}, true);
+    return histChange;
+  }
+
+  function addToHistory(doc, change, selAfter, opId) {
+    var hist = doc.history;
+    hist.undone.length = 0;
+    var time = +new Date, cur = lst(hist.done);
+
+    if (cur &&
+        (hist.lastOp == opId ||
+         hist.lastOrigin == change.origin && change.origin &&
+         ((change.origin.charAt(0) == "+" && doc.cm && hist.lastTime > time - doc.cm.options.historyEventDelay) ||
+          change.origin.charAt(0) == "*"))) {
+      // Merge this change into the last event
+      var last = lst(cur.changes);
+      if (posEq(change.from, change.to) && posEq(change.from, last.to)) {
+        // Optimized case for simple insertion -- don't want to add
+        // new changesets for every character typed
+        last.to = changeEnd(change);
       } else {
-        var oldoff = 0;
-        if (start < last.start) {
-          for (var i = last.start - start - 1; i >= 0; --i)
-            last.old.unshift(old[i]);
-          oldoff = Math.min(0, added - old.length);
-          last.added += last.start - start + oldoff;
-          last.start = start;
-        } else if (last.start < start) {
-          oldoff = start - last.start;
-          added += oldoff;
-        }
-        for (var i = last.added - oldoff, e = old.length; i < e; ++i)
-          last.old.push(old[i]);
-        if (last.added < added) last.added = added;
+        // Add new sub-event
+        cur.changes.push(historyChangeFromChange(doc, change));
       }
-      this.time = time;
+      cur.anchorAfter = selAfter.anchor; cur.headAfter = selAfter.head;
+    } else {
+      // Can not be merged, start a new event.
+      cur = {changes: [historyChangeFromChange(doc, change)],
+             generation: hist.generation,
+             anchorBefore: doc.sel.anchor, headBefore: doc.sel.head,
+             anchorAfter: selAfter.anchor, headAfter: selAfter.head};
+      hist.done.push(cur);
+      while (hist.done.length > hist.undoDepth)
+        hist.done.shift();
     }
-  };
+    hist.generation = ++hist.maxGeneration;
+    hist.lastTime = time;
+    hist.lastOp = opId;
+    hist.lastOrigin = change.origin;
+  }
+
+  function removeClearedSpans(spans) {
+    if (!spans) return null;
+    for (var i = 0, out; i < spans.length; ++i) {
+      if (spans[i].marker.explicitlyCleared) { if (!out) out = spans.slice(0, i); }
+      else if (out) out.push(spans[i]);
+    }
+    return !out ? spans : out.length ? out : null;
+  }
+
+  function getOldSpans(doc, change) {
+    var found = change["spans_" + doc.id];
+    if (!found) return null;
+    for (var i = 0, nw = []; i < change.text.length; ++i)
+      nw.push(removeClearedSpans(found[i]));
+    return nw;
+  }
+
+  // Used both to provide a JSON-safe object in .getHistory, and, when
+  // detaching a document, to split the history in two
+  function copyHistoryArray(events, newGroup) {
+    for (var i = 0, copy = []; i < events.length; ++i) {
+      var event = events[i], changes = event.changes, newChanges = [];
+      copy.push({changes: newChanges, anchorBefore: event.anchorBefore, headBefore: event.headBefore,
+                 anchorAfter: event.anchorAfter, headAfter: event.headAfter});
+      for (var j = 0; j < changes.length; ++j) {
+        var change = changes[j], m;
+        newChanges.push({from: change.from, to: change.to, text: change.text});
+        if (newGroup) for (var prop in change) if (m = prop.match(/^spans_(\d+)$/)) {
+          if (indexOf(newGroup, Number(m[1])) > -1) {
+            lst(newChanges)[prop] = change[prop];
+            delete change[prop];
+          }
+        }
+      }
+    }
+    return copy;
+  }
+
+  // Rebasing/resetting history to deal with externally-sourced changes
+
+  function rebaseHistSel(pos, from, to, diff) {
+    if (to < pos.line) {
+      pos.line += diff;
+    } else if (from < pos.line) {
+      pos.line = from;
+      pos.ch = 0;
+    }
+  }
+
+  // Tries to rebase an array of history events given a change in the
+  // document. If the change touches the same lines as the event, the
+  // event, and everything 'behind' it, is discarded. If the change is
+  // before the event, the event's positions are updated. Uses a
+  // copy-on-write scheme for the positions, to avoid having to
+  // reallocate them all on every rebase, but also avoid problems with
+  // shared position objects being unsafely updated.
+  function rebaseHistArray(array, from, to, diff) {
+    for (var i = 0; i < array.length; ++i) {
+      var sub = array[i], ok = true;
+      for (var j = 0; j < sub.changes.length; ++j) {
+        var cur = sub.changes[j];
+        if (!sub.copied) { cur.from = copyPos(cur.from); cur.to = copyPos(cur.to); }
+        if (to < cur.from.line) {
+          cur.from.line += diff;
+          cur.to.line += diff;
+        } else if (from <= cur.to.line) {
+          ok = false;
+          break;
+        }
+      }
+      if (!sub.copied) {
+        sub.anchorBefore = copyPos(sub.anchorBefore); sub.headBefore = copyPos(sub.headBefore);
+        sub.anchorAfter = copyPos(sub.anchorAfter); sub.readAfter = copyPos(sub.headAfter);
+        sub.copied = true;
+      }
+      if (!ok) {
+        array.splice(0, i + 1);
+        i = 0;
+      } else {
+        rebaseHistSel(sub.anchorBefore); rebaseHistSel(sub.headBefore);
+        rebaseHistSel(sub.anchorAfter); rebaseHistSel(sub.headAfter);
+      }
+    }
+  }
+
+  function rebaseHist(hist, change) {
+    var from = change.from.line, to = change.to.line, diff = change.text.length - (to - from) - 1;
+    rebaseHistArray(hist.done, from, to, diff);
+    rebaseHistArray(hist.undone, from, to, diff);
+  }
+
+  // EVENT OPERATORS
 
   function stopMethod() {e_stop(this);}
   // Ensure an event has a stop method.
@@ -2802,6 +5458,9 @@ var CodeMirror = (function() {
     if (e.stopPropagation) e.stopPropagation();
     else e.cancelBubble = true;
   }
+  function e_defaultPrevented(e) {
+    return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == false;
+  }
   function e_stop(e) {e_preventDefault(e); e_stopPropagation(e);}
   CodeMirror.e_stop = e_stop;
   CodeMirror.e_preventDefault = e_preventDefault;
@@ -2809,164 +5468,134 @@ var CodeMirror = (function() {
 
   function e_target(e) {return e.target || e.srcElement;}
   function e_button(e) {
-    if (e.which) return e.which;
-    else if (e.button & 1) return 1;
-    else if (e.button & 2) return 3;
-    else if (e.button & 4) return 2;
-  }
-
-  // Allow 3rd-party code to override event properties by adding an override
-  // object to an event object.
-  function e_prop(e, prop) {
-    var overridden = e.override && e.override.hasOwnProperty(prop);
-    return overridden ? e.override[prop] : e[prop];
-  }
-
-  // Event handler registration. If disconnect is true, it'll return a
-  // function that unregisters the handler.
-  function connect(node, type, handler, disconnect) {
-    if (typeof node.addEventListener == "function") {
-      node.addEventListener(type, handler, false);
-      if (disconnect) return function() {node.removeEventListener(type, handler, false);};
+    var b = e.which;
+    if (b == null) {
+      if (e.button & 1) b = 1;
+      else if (e.button & 2) b = 3;
+      else if (e.button & 4) b = 2;
     }
+    if (mac && e.ctrlKey && b == 1) b = 3;
+    return b;
+  }
+
+  // EVENT HANDLING
+
+  function on(emitter, type, f) {
+    if (emitter.addEventListener)
+      emitter.addEventListener(type, f, false);
+    else if (emitter.attachEvent)
+      emitter.attachEvent("on" + type, f);
     else {
-      var wrapHandler = function(event) {handler(event || window.event);};
-      node.attachEvent("on" + type, wrapHandler);
-      if (disconnect) return function() {node.detachEvent("on" + type, wrapHandler);};
+      var map = emitter._handlers || (emitter._handlers = {});
+      var arr = map[type] || (map[type] = []);
+      arr.push(f);
     }
   }
-  CodeMirror.connect = connect;
+
+  function off(emitter, type, f) {
+    if (emitter.removeEventListener)
+      emitter.removeEventListener(type, f, false);
+    else if (emitter.detachEvent)
+      emitter.detachEvent("on" + type, f);
+    else {
+      var arr = emitter._handlers && emitter._handlers[type];
+      if (!arr) return;
+      for (var i = 0; i < arr.length; ++i)
+        if (arr[i] == f) { arr.splice(i, 1); break; }
+    }
+  }
+
+  function signal(emitter, type /*, values...*/) {
+    var arr = emitter._handlers && emitter._handlers[type];
+    if (!arr) return;
+    var args = Array.prototype.slice.call(arguments, 2);
+    for (var i = 0; i < arr.length; ++i) arr[i].apply(null, args);
+  }
+
+  var delayedCallbacks, delayedCallbackDepth = 0;
+  function signalLater(emitter, type /*, values...*/) {
+    var arr = emitter._handlers && emitter._handlers[type];
+    if (!arr) return;
+    var args = Array.prototype.slice.call(arguments, 2);
+    if (!delayedCallbacks) {
+      ++delayedCallbackDepth;
+      delayedCallbacks = [];
+      setTimeout(fireDelayed, 0);
+    }
+    function bnd(f) {return function(){f.apply(null, args);};};
+    for (var i = 0; i < arr.length; ++i)
+      delayedCallbacks.push(bnd(arr[i]));
+  }
+
+  function signalDOMEvent(cm, e, override) {
+    signal(cm, override || e.type, cm, e);
+    return e_defaultPrevented(e) || e.codemirrorIgnore;
+  }
+
+  function fireDelayed() {
+    --delayedCallbackDepth;
+    var delayed = delayedCallbacks;
+    delayedCallbacks = null;
+    for (var i = 0; i < delayed.length; ++i) delayed[i]();
+  }
+
+  function hasHandler(emitter, type) {
+    var arr = emitter._handlers && emitter._handlers[type];
+    return arr && arr.length > 0;
+  }
+
+  CodeMirror.on = on; CodeMirror.off = off; CodeMirror.signal = signal;
+
+  function eventMixin(ctor) {
+    ctor.prototype.on = function(type, f) {on(this, type, f);};
+    ctor.prototype.off = function(type, f) {off(this, type, f);};
+  }
+
+  // MISC UTILITIES
+
+  // Number of pixels added to scroller and sizer to hide scrollbar
+  var scrollerCutOff = 30;
+
+  // Returned or thrown by various protocols to signal 'I'm not
+  // handling this'.
+  var Pass = CodeMirror.Pass = {toString: function(){return "CodeMirror.Pass";}};
 
   function Delayed() {this.id = null;}
   Delayed.prototype = {set: function(ms, f) {clearTimeout(this.id); this.id = setTimeout(f, ms);}};
 
-  var Pass = CodeMirror.Pass = {toString: function(){return "CodeMirror.Pass";}};
-
-  var gecko = /gecko\/\d{7}/i.test(navigator.userAgent);
-  var ie = /MSIE \d/.test(navigator.userAgent);
-  var ie_lt9 = /MSIE [1-8]\b/.test(navigator.userAgent);
-  var webkit = /WebKit\//.test(navigator.userAgent);
-  var chrome = /Chrome\//.test(navigator.userAgent);
-  var khtml = /KHTML\//.test(navigator.userAgent);
-
-  // Detect drag-and-drop
-  var dragAndDrop = function() {
-    // There is *some* kind of drag-and-drop support in IE6-8, but I
-    // couldn't get it to work yet.
-    if (ie_lt9) return false;
-    var div = document.createElement('div');
-    return "draggable" in div || "dragDrop" in div;
-  }();
-
-  var lineSep = "\n";
-  // Feature-detect whether newlines in textareas are converted to \r\n
-  (function () {
-    var te = document.createElement("textarea");
-    te.value = "foo\nbar";
-    if (te.value.indexOf("\r") > -1) lineSep = "\r\n";
-  }());
-
   // Counts the column offset in a string, taking tabs into account.
   // Used mostly to find indentation.
-  function countColumn(string, end, tabSize) {
+  function countColumn(string, end, tabSize, startIndex, startValue) {
     if (end == null) {
       end = string.search(/[^\s\u00a0]/);
       if (end == -1) end = string.length;
     }
-    for (var i = 0, n = 0; i < end; ++i) {
+    for (var i = startIndex || 0, n = startValue || 0; i < end; ++i) {
       if (string.charAt(i) == "\t") n += tabSize - (n % tabSize);
       else ++n;
     }
     return n;
   }
+  CodeMirror.countColumn = countColumn;
 
-  function computedStyle(elt) {
-    if (elt.currentStyle) return elt.currentStyle;
-    return window.getComputedStyle(elt, null);
+  var spaceStrs = [""];
+  function spaceStr(n) {
+    while (spaceStrs.length <= n)
+      spaceStrs.push(lst(spaceStrs) + " ");
+    return spaceStrs[n];
   }
 
-  // Find the position of an element by following the offsetParent chain.
-  // If screen==true, it returns screen (rather than page) coordinates.
-  function eltOffset(node, screen) {
-    var bod = node.ownerDocument.body;
-    var x = 0, y = 0, skipBody = false;
-    for (var n = node; n; n = n.offsetParent) {
-      var ol = n.offsetLeft, ot = n.offsetTop;
-      // Firefox reports weird inverted offsets when the body has a border.
-      if (n == bod) { x += Math.abs(ol); y += Math.abs(ot); }
-      else { x += ol, y += ot; }
-      if (screen && computedStyle(n).position == "fixed")
-        skipBody = true;
-    }
-    var e = screen && !skipBody ? null : bod;
-    for (var n = node.parentNode; n != e; n = n.parentNode)
-      if (n.scrollLeft != null) { x -= n.scrollLeft; y -= n.scrollTop;}
-    return {left: x, top: y};
-  }
-  // Use the faster and saner getBoundingClientRect method when possible.
-  if (document.documentElement.getBoundingClientRect != null) eltOffset = function(node, screen) {
-    // Take the parts of bounding client rect that we are interested in so we are able to edit if need be,
-    // since the returned value cannot be changed externally (they are kept in sync as the element moves within the page)
-    try { var box = node.getBoundingClientRect(); box = { top: box.top, left: box.left }; }
-    catch(e) { box = {top: 0, left: 0}; }
-    if (!screen) {
-      // Get the toplevel scroll, working around browser differences.
-      if (window.pageYOffset == null) {
-        var t = document.documentElement || document.body.parentNode;
-        if (t.scrollTop == null) t = document.body;
-        box.top += t.scrollTop; box.left += t.scrollLeft;
-      } else {
-        box.top += window.pageYOffset; box.left += window.pageXOffset;
-      }
-    }
-    return box;
-  };
+  function lst(arr) { return arr[arr.length-1]; }
 
-  // Get a node's text content.
-  function eltText(node) {
-    return node.textContent || node.innerText || node.nodeValue || "";
-  }
   function selectInput(node) {
     if (ios) { // Mobile Safari apparently has a bug where select() is broken.
       node.selectionStart = 0;
       node.selectionEnd = node.value.length;
-    } else node.select();
-  }
-
-  // Operations on {line, ch} objects.
-  function posEq(a, b) {return a.line == b.line && a.ch == b.ch;}
-  function posLess(a, b) {return a.line < b.line || (a.line == b.line && a.ch < b.ch);}
-  function copyPos(x) {return {line: x.line, ch: x.ch};}
-
-  var escapeElement = document.createElement("pre");
-  function htmlEscape(str) {
-    escapeElement.textContent = str;
-    return escapeElement.innerHTML;
-  }
-  // Recent (late 2011) Opera betas insert bogus newlines at the start
-  // of the textContent, so we strip those.
-  if (htmlEscape("a") == "\na")
-    htmlEscape = function(str) {
-      escapeElement.textContent = str;
-      return escapeElement.innerHTML.slice(1);
-    };
-  // Some IEs don't preserve tabs through innerHTML
-  else if (htmlEscape("\t") != "\t")
-    htmlEscape = function(str) {
-      escapeElement.innerHTML = "";
-      escapeElement.appendChild(document.createTextNode(str));
-      return escapeElement.innerHTML;
-    };
-  CodeMirror.htmlEscape = htmlEscape;
-
-  // Used to position the cursor after an undo/redo by finding the
-  // last edited character.
-  function editEnd(from, to) {
-    if (!to) return 0;
-    if (!from) return to.length;
-    for (var i = from.length, j = to.length; i >= 0 && j >= 0; --i, --j)
-      if (from.charAt(i) != to.charAt(j)) break;
-    return j + 1;
+    } else {
+      // Suppress mysterious IE10 errors
+      try { node.select(); }
+      catch(_e) {}
+    }
   }
 
   function indexOf(collection, elt) {
@@ -2975,21 +5604,160 @@ var CodeMirror = (function() {
       if (collection[i] == elt) return i;
     return -1;
   }
+
+  function createObj(base, props) {
+    function Obj() {}
+    Obj.prototype = base;
+    var inst = new Obj();
+    if (props) copyObj(props, inst);
+    return inst;
+  }
+
+  function copyObj(obj, target) {
+    if (!target) target = {};
+    for (var prop in obj) if (obj.hasOwnProperty(prop)) target[prop] = obj[prop];
+    return target;
+  }
+
+  function emptyArray(size) {
+    for (var a = [], i = 0; i < size; ++i) a.push(undefined);
+    return a;
+  }
+
+  function bind(f) {
+    var args = Array.prototype.slice.call(arguments, 1);
+    return function(){return f.apply(null, args);};
+  }
+
+  var nonASCIISingleCaseWordChar = /[\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/;
   function isWordChar(ch) {
-    return /\w/.test(ch) || ch.toUpperCase() != ch.toLowerCase();
+    return /\w/.test(ch) || ch > "\x80" &&
+      (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch));
+  }
+
+  function isEmpty(obj) {
+    for (var n in obj) if (obj.hasOwnProperty(n) && obj[n]) return false;
+    return true;
+  }
+
+  var extendingChars = /[\u0300-\u036f\u0483-\u0489\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u065e\u0670\u06d6-\u06dc\u06de-\u06e4\u06e7\u06e8\u06ea-\u06ed\u0711\u0730-\u074a\u07a6-\u07b0\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0900-\u0902\u093c\u0941-\u0948\u094d\u0951-\u0955\u0962\u0963\u0981\u09bc\u09be\u09c1-\u09c4\u09cd\u09d7\u09e2\u09e3\u0a01\u0a02\u0a3c\u0a41\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a70\u0a71\u0a75\u0a81\u0a82\u0abc\u0ac1-\u0ac5\u0ac7\u0ac8\u0acd\u0ae2\u0ae3\u0b01\u0b3c\u0b3e\u0b3f\u0b41-\u0b44\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b82\u0bbe\u0bc0\u0bcd\u0bd7\u0c3e-\u0c40\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0cbc\u0cbf\u0cc2\u0cc6\u0ccc\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0d3e\u0d41-\u0d44\u0d4d\u0d57\u0d62\u0d63\u0dca\u0dcf\u0dd2-\u0dd4\u0dd6\u0ddf\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0f18\u0f19\u0f35\u0f37\u0f39\u0f71-\u0f7e\u0f80-\u0f84\u0f86\u0f87\u0f90-\u0f97\u0f99-\u0fbc\u0fc6\u102d-\u1030\u1032-\u1037\u1039\u103a\u103d\u103e\u1058\u1059\u105e-\u1060\u1071-\u1074\u1082\u1085\u1086\u108d\u109d\u135f\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b7-\u17bd\u17c6\u17c9-\u17d3\u17dd\u180b-\u180d\u18a9\u1920-\u1922\u1927\u1928\u1932\u1939-\u193b\u1a17\u1a18\u1a56\u1a58-\u1a5e\u1a60\u1a62\u1a65-\u1a6c\u1a73-\u1a7c\u1a7f\u1b00-\u1b03\u1b34\u1b36-\u1b3a\u1b3c\u1b42\u1b6b-\u1b73\u1b80\u1b81\u1ba2-\u1ba5\u1ba8\u1ba9\u1c2c-\u1c33\u1c36\u1c37\u1cd0-\u1cd2\u1cd4-\u1ce0\u1ce2-\u1ce8\u1ced\u1dc0-\u1de6\u1dfd-\u1dff\u200c\u200d\u20d0-\u20f0\u2cef-\u2cf1\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua66f-\ua672\ua67c\ua67d\ua6f0\ua6f1\ua802\ua806\ua80b\ua825\ua826\ua8c4\ua8e0-\ua8f1\ua926-\ua92d\ua947-\ua951\ua980-\ua982\ua9b3\ua9b6-\ua9b9\ua9bc\uaa29-\uaa2e\uaa31\uaa32\uaa35\uaa36\uaa43\uaa4c\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uabe5\uabe8\uabed\udc00-\udfff\ufb1e\ufe00-\ufe0f\ufe20-\ufe26\uff9e\uff9f]/;
+  function isExtendingChar(ch) { return ch.charCodeAt(0) >= 768 && extendingChars.test(ch); }
+
+  // DOM UTILITIES
+
+  function elt(tag, content, className, style) {
+    var e = document.createElement(tag);
+    if (className) e.className = className;
+    if (style) e.style.cssText = style;
+    if (typeof content == "string") setTextContent(e, content);
+    else if (content) for (var i = 0; i < content.length; ++i) e.appendChild(content[i]);
+    return e;
+  }
+
+  function removeChildren(e) {
+    for (var count = e.childNodes.length; count > 0; --count)
+      e.removeChild(e.firstChild);
+    return e;
+  }
+
+  function removeChildrenAndAdd(parent, e) {
+    return removeChildren(parent).appendChild(e);
+  }
+
+  function setTextContent(e, str) {
+    if (ie_lt9) {
+      e.innerHTML = "";
+      e.appendChild(document.createTextNode(str));
+    } else e.textContent = str;
+  }
+
+  function getRect(node) {
+    return node.getBoundingClientRect();
+  }
+  CodeMirror.replaceGetRect = function(f) { getRect = f; };
+
+  // FEATURE DETECTION
+
+  // Detect drag-and-drop
+  var dragAndDrop = function() {
+    // There is *some* kind of drag-and-drop support in IE6-8, but I
+    // couldn't get it to work yet.
+    if (ie_lt9) return false;
+    var div = elt('div');
+    return "draggable" in div || "dragDrop" in div;
+  }();
+
+  // For a reason I have yet to figure out, some browsers disallow
+  // word wrapping between certain characters *only* if a new inline
+  // element is started between them. This makes it hard to reliably
+  // measure the position of things, since that requires inserting an
+  // extra span. This terribly fragile set of tests matches the
+  // character combinations that suffer from this phenomenon on the
+  // various browsers.
+  function spanAffectsWrapping() { return false; }
+  if (gecko) // Only for "$'"
+    spanAffectsWrapping = function(str, i) {
+      return str.charCodeAt(i - 1) == 36 && str.charCodeAt(i) == 39;
+    };
+  else if (safari && !/Version\/([6-9]|\d\d)\b/.test(navigator.userAgent))
+    spanAffectsWrapping = function(str, i) {
+      return /\-[^ \-?]|\?[^ !\'\"\),.\-\/:;\?\]\}]/.test(str.slice(i - 1, i + 1));
+    };
+  else if (webkit && /Chrome\/(?:29|[3-9]\d|\d\d\d)\./.test(navigator.userAgent))
+    spanAffectsWrapping = function(str, i) {
+      var code = str.charCodeAt(i - 1);
+      return code >= 8208 && code <= 8212;
+    };
+  else if (webkit)
+    spanAffectsWrapping = function(str, i) {
+      if (i > 1 && str.charCodeAt(i - 1) == 45) {
+        if (/\w/.test(str.charAt(i - 2)) && /[^\-?\.]/.test(str.charAt(i))) return true;
+        if (i > 2 && /[\d\.,]/.test(str.charAt(i - 2)) && /[\d\.,]/.test(str.charAt(i))) return false;
+      }
+      return /[~!#%&*)=+}\]\\|\"\.>,:;][({[<]|-[^\-?\.\u2010-\u201f\u2026]|\?[\w~`@#$%\^&*(_=+{[|><]|\u2026[\w~`@#$%\^&*(_=+{[><]/.test(str.slice(i - 1, i + 1));
+    };
+
+  var knownScrollbarWidth;
+  function scrollbarWidth(measure) {
+    if (knownScrollbarWidth != null) return knownScrollbarWidth;
+    var test = elt("div", null, null, "width: 50px; height: 50px; overflow-x: scroll");
+    removeChildrenAndAdd(measure, test);
+    if (test.offsetWidth)
+      knownScrollbarWidth = test.offsetHeight - test.clientHeight;
+    return knownScrollbarWidth || 0;
+  }
+
+  var zwspSupported;
+  function zeroWidthElement(measure) {
+    if (zwspSupported == null) {
+      var test = elt("span", "\u200b");
+      removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")]));
+      if (measure.firstChild.offsetHeight != 0)
+        zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !ie_lt8;
+    }
+    if (zwspSupported) return elt("span", "\u200b");
+    else return elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px");
   }
 
   // See if "".split is the broken IE version, if so, provide an
   // alternative way to split lines.
   var splitLines = "\n\nb".split(/\n/).length != 3 ? function(string) {
-    var pos = 0, nl, result = [];
-    while ((nl = string.indexOf("\n", pos)) > -1) {
-      result.push(string.slice(pos, string.charAt(nl-1) == "\r" ? nl - 1 : nl));
-      pos = nl + 1;
+    var pos = 0, result = [], l = string.length;
+    while (pos <= l) {
+      var nl = string.indexOf("\n", pos);
+      if (nl == -1) nl = string.length;
+      var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl);
+      var rt = line.indexOf("\r");
+      if (rt != -1) {
+        result.push(line.slice(0, rt));
+        pos += rt + 1;
+      } else {
+        result.push(line);
+        pos = nl + 1;
+      }
     }
-    result.push(string.slice(pos));
     return result;
-  } : function(string){return string.split(/\r?\n/);};
+  } : function(string){return string.split(/\r\n?|\n/);};
   CodeMirror.splitLines = splitLines;
 
   var hasSelection = window.getSelection ? function(te) {
@@ -3002,27 +5770,307 @@ var CodeMirror = (function() {
     return range.compareEndPoints("StartToEnd", range) != 0;
   };
 
-  CodeMirror.defineMode("null", function() {
-    return {token: function(stream) {stream.skipToEnd();}};
-  });
-  CodeMirror.defineMIME("text/plain", "null");
+  var hasCopyEvent = (function() {
+    var e = elt("div");
+    if ("oncopy" in e) return true;
+    e.setAttribute("oncopy", "return;");
+    return typeof e.oncopy == 'function';
+  })();
+
+  // KEY NAMING
 
   var keyNames = {3: "Enter", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
                   19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
                   36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
-                  46: "Delete", 59: ";", 91: "Mod", 92: "Mod", 93: "Mod", 127: "Delete", 186: ";", 187: "=", 188: ",",
-                  189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\", 221: "]", 222: "'", 63276: "PageUp",
-                  63277: "PageDown", 63275: "End", 63273: "Home", 63234: "Left", 63232: "Up", 63235: "Right",
-                  63233: "Down", 63302: "Insert", 63272: "Delete"};
+                  46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod", 107: "=", 109: "-", 127: "Delete",
+                  173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\",
+                  221: "]", 222: "'", 63232: "Up", 63233: "Down", 63234: "Left", 63235: "Right", 63272: "Delete",
+                  63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown", 63302: "Insert"};
   CodeMirror.keyNames = keyNames;
   (function() {
     // Number keys
-    for (var i = 0; i < 10; i++) keyNames[i + 48] = String(i);
+    for (var i = 0; i < 10; i++) keyNames[i + 48] = keyNames[i + 96] = String(i);
     // Alphabetic keys
     for (var i = 65; i <= 90; i++) keyNames[i] = String.fromCharCode(i);
     // Function keys
     for (var i = 1; i <= 12; i++) keyNames[i + 111] = keyNames[i + 63235] = "F" + i;
   })();
 
+  // BIDI HELPERS
+
+  function iterateBidiSections(order, from, to, f) {
+    if (!order) return f(from, to, "ltr");
+    var found = false;
+    for (var i = 0; i < order.length; ++i) {
+      var part = order[i];
+      if (part.from < to && part.to > from || from == to && part.to == from) {
+        f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "rtl" : "ltr");
+        found = true;
+      }
+    }
+    if (!found) f(from, to, "ltr");
+  }
+
+  function bidiLeft(part) { return part.level % 2 ? part.to : part.from; }
+  function bidiRight(part) { return part.level % 2 ? part.from : part.to; }
+
+  function lineLeft(line) { var order = getOrder(line); return order ? bidiLeft(order[0]) : 0; }
+  function lineRight(line) {
+    var order = getOrder(line);
+    if (!order) return line.text.length;
+    return bidiRight(lst(order));
+  }
+
+  function lineStart(cm, lineN) {
+    var line = getLine(cm.doc, lineN);
+    var visual = visualLine(cm.doc, line);
+    if (visual != line) lineN = lineNo(visual);
+    var order = getOrder(visual);
+    var ch = !order ? 0 : order[0].level % 2 ? lineRight(visual) : lineLeft(visual);
+    return Pos(lineN, ch);
+  }
+  function lineEnd(cm, lineN) {
+    var merged, line;
+    while (merged = collapsedSpanAtEnd(line = getLine(cm.doc, lineN)))
+      lineN = merged.find().to.line;
+    var order = getOrder(line);
+    var ch = !order ? line.text.length : order[0].level % 2 ? lineLeft(line) : lineRight(line);
+    return Pos(lineN, ch);
+  }
+
+  function compareBidiLevel(order, a, b) {
+    var linedir = order[0].level;
+    if (a == linedir) return true;
+    if (b == linedir) return false;
+    return a < b;
+  }
+  var bidiOther;
+  function getBidiPartAt(order, pos) {
+    bidiOther = null;
+    for (var i = 0, found; i < order.length; ++i) {
+      var cur = order[i];
+      if (cur.from < pos && cur.to > pos) return i;
+      if ((cur.from == pos || cur.to == pos)) {
+        if (found == null) {
+          found = i;
+        } else if (compareBidiLevel(order, cur.level, order[found].level)) {
+          if (cur.from != cur.to) bidiOther = found;
+          return i;
+        } else {
+          if (cur.from != cur.to) bidiOther = i;
+          return found;
+        }
+      }
+    }
+    return found;
+  }
+
+  function moveInLine(line, pos, dir, byUnit) {
+    if (!byUnit) return pos + dir;
+    do pos += dir;
+    while (pos > 0 && isExtendingChar(line.text.charAt(pos)));
+    return pos;
+  }
+
+  // This is somewhat involved. It is needed in order to move
+  // 'visually' through bi-directional text -- i.e., pressing left
+  // should make the cursor go left, even when in RTL text. The
+  // tricky part is the 'jumps', where RTL and LTR text touch each
+  // other. This often requires the cursor offset to move more than
+  // one unit, in order to visually move one unit.
+  function moveVisually(line, start, dir, byUnit) {
+    var bidi = getOrder(line);
+    if (!bidi) return moveLogically(line, start, dir, byUnit);
+    var pos = getBidiPartAt(bidi, start), part = bidi[pos];
+    var target = moveInLine(line, start, part.level % 2 ? -dir : dir, byUnit);
+
+    for (;;) {
+      if (target > part.from && target < part.to) return target;
+      if (target == part.from || target == part.to) {
+        if (getBidiPartAt(bidi, target) == pos) return target;
+        part = bidi[pos += dir];
+        return (dir > 0) == part.level % 2 ? part.to : part.from;
+      } else {
+        part = bidi[pos += dir];
+        if (!part) return null;
+        if ((dir > 0) == part.level % 2)
+          target = moveInLine(line, part.to, -1, byUnit);
+        else
+          target = moveInLine(line, part.from, 1, byUnit);
+      }
+    }
+  }
+
+  function moveLogically(line, start, dir, byUnit) {
+    var target = start + dir;
+    if (byUnit) while (target > 0 && isExtendingChar(line.text.charAt(target))) target += dir;
+    return target < 0 || target > line.text.length ? null : target;
+  }
+
+  // Bidirectional ordering algorithm
+  // See http://unicode.org/reports/tr9/tr9-13.html for the algorithm
+  // that this (partially) implements.
+
+  // One-char codes used for character types:
+  // L (L):   Left-to-Right
+  // R (R):   Right-to-Left
+  // r (AL):  Right-to-Left Arabic
+  // 1 (EN):  European Number
+  // + (ES):  European Number Separator
+  // % (ET):  European Number Terminator
+  // n (AN):  Arabic Number
+  // , (CS):  Common Number Separator
+  // m (NSM): Non-Spacing Mark
+  // b (BN):  Boundary Neutral
+  // s (B):   Paragraph Separator
+  // t (S):   Segment Separator
+  // w (WS):  Whitespace
+  // N (ON):  Other Neutrals
+
+  // Returns null if characters are ordered as they appear
+  // (left-to-right), or an array of sections ({from, to, level}
+  // objects) in the order in which they occur visually.
+  var bidiOrdering = (function() {
+    // Character types for codepoints 0 to 0xff
+    var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbbbbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLL";
+    // Character types for codepoints 0x600 to 0x6ff
+    var arabicTypes = "rrrrrrrrrrrr,rNNmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmrrrrrrrnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmNmmmmrrrrrrrrrrrrrrrrrr";
+    function charType(code) {
+      if (code <= 0xff) return lowTypes.charAt(code);
+      else if (0x590 <= code && code <= 0x5f4) return "R";
+      else if (0x600 <= code && code <= 0x6ff) return arabicTypes.charAt(code - 0x600);
+      else if (0x700 <= code && code <= 0x8ac) return "r";
+      else return "L";
+    }
+
+    var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/;
+    var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, countsAsNum = /[1n]/;
+    // Browsers seem to always treat the boundaries of block elements as being L.
+    var outerType = "L";
+
+    return function(str) {
+      if (!bidiRE.test(str)) return false;
+      var len = str.length, types = [];
+      for (var i = 0, type; i < len; ++i)
+        types.push(type = charType(str.charCodeAt(i)));
+
+      // W1. Examine each non-spacing mark (NSM) in the level run, and
+      // change the type of the NSM to the type of the previous
+      // character. If the NSM is at the start of the level run, it will
+      // get the type of sor.
+      for (var i = 0, prev = outerType; i < len; ++i) {
+        var type = types[i];
+        if (type == "m") types[i] = prev;
+        else prev = type;
+      }
+
+      // W2. Search backwards from each instance of a European number
+      // until the first strong type (R, L, AL, or sor) is found. If an
+      // AL is found, change the type of the European number to Arabic
+      // number.
+      // W3. Change all ALs to R.
+      for (var i = 0, cur = outerType; i < len; ++i) {
+        var type = types[i];
+        if (type == "1" && cur == "r") types[i] = "n";
+        else if (isStrong.test(type)) { cur = type; if (type == "r") types[i] = "R"; }
+      }
+
+      // W4. A single European separator between two European numbers
+      // changes to a European number. A single common separator between
+      // two numbers of the same type changes to that type.
+      for (var i = 1, prev = types[0]; i < len - 1; ++i) {
+        var type = types[i];
+        if (type == "+" && prev == "1" && types[i+1] == "1") types[i] = "1";
+        else if (type == "," && prev == types[i+1] &&
+                 (prev == "1" || prev == "n")) types[i] = prev;
+        prev = type;
+      }
+
+      // W5. A sequence of European terminators adjacent to European
+      // numbers changes to all European numbers.
+      // W6. Otherwise, separators and terminators change to Other
+      // Neutral.
+      for (var i = 0; i < len; ++i) {
+        var type = types[i];
+        if (type == ",") types[i] = "N";
+        else if (type == "%") {
+          for (var end = i + 1; end < len && types[end] == "%"; ++end) {}
+          var replace = (i && types[i-1] == "!") || (end < len && types[end] == "1") ? "1" : "N";
+          for (var j = i; j < end; ++j) types[j] = replace;
+          i = end - 1;
+        }
+      }
+
+      // W7. Search backwards from each instance of a European number
+      // until the first strong type (R, L, or sor) is found. If an L is
+      // found, then change the type of the European number to L.
+      for (var i = 0, cur = outerType; i < len; ++i) {
+        var type = types[i];
+        if (cur == "L" && type == "1") types[i] = "L";
+        else if (isStrong.test(type)) cur = type;
+      }
+
+      // N1. A sequence of neutrals takes the direction of the
+      // surrounding strong text if the text on both sides has the same
+      // direction. European and Arabic numbers act as if they were R in
+      // terms of their influence on neutrals. Start-of-level-run (sor)
+      // and end-of-level-run (eor) are used at level run boundaries.
+      // N2. Any remaining neutrals take the embedding direction.
+      for (var i = 0; i < len; ++i) {
+        if (isNeutral.test(types[i])) {
+          for (var end = i + 1; end < len && isNeutral.test(types[end]); ++end) {}
+          var before = (i ? types[i-1] : outerType) == "L";
+          var after = (end < len ? types[end] : outerType) == "L";
+          var replace = before || after ? "L" : "R";
+          for (var j = i; j < end; ++j) types[j] = replace;
+          i = end - 1;
+        }
+      }
+
+      // Here we depart from the documented algorithm, in order to avoid
+      // building up an actual levels array. Since there are only three
+      // levels (0, 1, 2) in an implementation that doesn't take
+      // explicit embedding into account, we can build up the order on
+      // the fly, without following the level-based algorithm.
+      var order = [], m;
+      for (var i = 0; i < len;) {
+        if (countsAsLeft.test(types[i])) {
+          var start = i;
+          for (++i; i < len && countsAsLeft.test(types[i]); ++i) {}
+          order.push({from: start, to: i, level: 0});
+        } else {
+          var pos = i, at = order.length;
+          for (++i; i < len && types[i] != "L"; ++i) {}
+          for (var j = pos; j < i;) {
+            if (countsAsNum.test(types[j])) {
+              if (pos < j) order.splice(at, 0, {from: pos, to: j, level: 1});
+              var nstart = j;
+              for (++j; j < i && countsAsNum.test(types[j]); ++j) {}
+              order.splice(at, 0, {from: nstart, to: j, level: 2});
+              pos = j;
+            } else ++j;
+          }
+          if (pos < i) order.splice(at, 0, {from: pos, to: i, level: 1});
+        }
+      }
+      if (order[0].level == 1 && (m = str.match(/^\s+/))) {
+        order[0].from = m[0].length;
+        order.unshift({from: 0, to: m[0].length, level: 0});
+      }
+      if (lst(order).level == 1 && (m = str.match(/\s+$/))) {
+        lst(order).to -= m[0].length;
+        order.push({from: len - m[0].length, to: len, level: 0});
+      }
+      if (order[0].level != lst(order).level)
+        order.push({from: len, to: len, level: order[0].level});
+
+      return order;
+    };
+  })();
+
+  // THE END
+
+  CodeMirror.version = "3.21.0";
+
   return CodeMirror;
 })();
diff --git a/common/static/js/vendor/codemirror-compressed.js b/common/static/js/vendor/codemirror-compressed.js
index d5fa87bf9f..43725255bd 100644
--- a/common/static/js/vendor/codemirror-compressed.js
+++ b/common/static/js/vendor/codemirror-compressed.js
@@ -1,449 +1,6 @@
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b=a.getCursor().line;c!=""&&(CodeMirror.commands.goLineEnd(a),a.replaceSelection(c,"end")),a.setCursor(b+1)},"Shift-X":function(a){CodeMirror.commands.delCharLeft(a)},"Shift-J":function(a){p(a)},"Shift-`":function(a){var b=a.getCursor(),c=a.getRange({line:b.line,ch:b.ch},{line:b.line,ch:b.ch+1});c=c!=c.toLowerCase()?c.toLowerCase():c.toUpperCase(),a.replaceRange(c,{line:b.line,ch:b.ch},{line:b.line,ch:b.ch+1}),a.setCursor(b.line,b.ch+1)},"Ctrl-B":function(a){CodeMirror.commands.goPageUp(a)},"Ctrl-F":function(a){CodeMirror.commands.goPageDown(a)},"Ctrl-P":"goLineUp","Ctrl-N":"goLineDown",U:"undo","Ctrl-R":"redo","Shift-4":"goLineEnd"},function(a,b){t[a]=j(b)}),CodeMirror.keyMap["vim-prefix-g"]={E:j(function(a){o(a,l,-1,"start")}),"Shift-E":j(function(a){o(a,m,-1,"start")}),auto:"vim",catchall:function(a){}},CodeMirror.keyMap["vim-prefix-m"]={A:function(a){e.A=a.getCursor().line},"Shift-A":function(a){e["Shift-A"]=a.getCursor().line},B:function(a){e.B=a.getCursor().line},"Shift-B":function(a){e["Shift-B"]=a.getCursor().line},C:function(a){e.C=a.getCursor().line},"Shift-C":function(a){e["Shift-C"]=a.getCursor().line},D:function(a){e.D=a.getCursor().line},"Shift-D":function(a){e["Shift-D"]=a.getCursor().line},E:function(a){e.E=a.getCursor().line},"Shift-E":function(a){e["Shift-E"]=a.getCursor().line},F:function(a){e.F=a.getCursor().line},"Shift-F":function(a){e["Shift-F"]=a.getCursor().line},G:function(a){e.G=a.getCursor().line},"Shift-G":function(a){e["Shift-G"]=a.getCursor().line},H:function(a){e.H=a.getCursor().line},"Shift-H":function(a){e["Shift-H"]=a.getCursor().line},I:function(a){e.I=a.getCursor().line},"Shift-I":function(a){e["Shift-I"]=a.getCursor().line},J:function(a){e.J=a.getCursor().line},"Shift-J":function(a){e["Shift-J"]=a.getCursor().line},K:function(a){e.K=a.getCursor().line},"Shift-K":function(a){e["Shift-K"]=a.getCursor().line},L:function(a){e.L=a.getCursor().line},"Shift-L":function(a){e["Shift-L"]=a.getCursor().line},M:function(a){e.M=a.getCursor().line},"Shift-M":function(a){e["Shift-M"]=a.getCursor().line},N:function(a){e.N=a.getCursor().line},"Shift-N":function(a){e["Shift-N"]=a.getCursor().line},O:function(a){e.O=a.getCursor().line},"Shift-O":function(a){e["Shift-O"]=a.getCursor().line},P:function(a){e.P=a.getCursor().line},"Shift-P":function(a){e["Shift-P"]=a.getCursor().line},Q:function(a){e.Q=a.getCursor().line},"Shift-Q":function(a){e["Shift-Q"]=a.getCursor().line},R:function(a){e.R=a.getCursor().line},"Shift-R":function(a){e["Shift-R"]=a.getCursor().line},S:function(a){e.S=a.getCursor().line},"Shift-S":function(a){e["Shift-S"]=a.getCursor().line},T:function(a){e.T=a.getCursor().line},"Shift-T":function(a){e["Shift-T"]=a.getCursor().line},U:function(a){e.U=a.getCursor().line},"Shift-U":function(a){e["Shift-U"]=a.getCursor().line},V:function(a){e.V=a.getCursor().line},"Shift-V":function(a){e["Shift-V"]=a.getCursor().line},W:function(a){e.W=a.getCursor().line},"Shift-W":function(a){e["Shift-W"]=a.getCursor().line},X:function(a){e.X=a.getCursor().line},"Shift-X":function(a){e["Shift-X"]=a.getCursor().line},Y:function(a){e.Y=a.getCursor().line},"Shift-Y":function(a){e["Shift-Y"]=a.getCursor().line},Z:function(a){e.Z=a.getCursor().line},"Shift-Z":function(a){e["Shift-Z"]=a.getCursor().line},auto:"vim",catchall:function(a){}},CodeMirror.keyMap["vim-prefix-d"]={D:j(function(a){g("\n"+a.getLine(a.getCursor().line)),a.removeLine(a.getCursor().line)}),"'":function(a){a.setOption("keyMap","vim-prefix-d'"),f()},auto:"vim",catchall:function(a){}},CodeMirror.keyMap["vim-prefix-d'"]={A:function(a){r(a,"A")},"Shift-A":function(a){r(a,"Shift-A")},B:function(a){r(a,"B")},"Shift-B":function(a){r(a,"Shift-B")},C:function(a){r(a,"C")},"Shift-C":function(a){r(a,"Shift-C")},D:function(a){r(a,"D")},"Shift-D":function(a){r(a,"Shift-D")},E:function(a){r(a,"E")},"Shift-E":function(a){r(a,"Shift-E")},F:function(a){r(a,"F")},"Shift-F":function(a){r(a,"Shift-F")},G:function(a){r(a,"G")},"Shift-G":function(a){r(a,"Shift-G")},H:function(a){r(a,"H")},"Shift-H":function(a){r(a,"Shift-H")},I:function(a){r(a,"I")},"Shift-I":function(a){r(a,"Shift-I")},J:function(a){r(a,"J")},"Shift-J":function(a){r(a,"Shift-J")},K:function(a){r(a,"K")},"Shift-K":function(a){r(a,"Shift-K")},L:function(a){r(a,"L")},"Shift-L":function(a){r(a,"Shift-L")},M:function(a){r(a,"M")},"Shift-M":function(a){r(a,"Shift-M")},N:function(a){r(a,"N")},"Shift-N":function(a){r(a,"Shift-N")},O:function(a){r(a,"O")},"Shift-O":function(a){r(a,"Shift-O")},P:function(a){r(a,"P")},"Shift-P":function(a){r(a,"Shift-P")},Q:function(a){r(a,"Q")},"Shift-Q":function(a){r(a,"Shift-Q")},R:function(a){r(a,"R")},"Shift-R":function(a){r(a,"Shift-R")},S:function(a){r(a,"S")},"Shift-S":function(a){r(a,"Shift-S")},T:function(a){r(a,"T")},"Shift-T":function(a){r(a,"Shift-T")},U:function(a){r(a,"U")},"Shift-U":function(a){r(a,"Shift-U")},V:function(a){r(a,"V")},"Shift-V":function(a){r(a,"Shift-V")},W:function(a){r(a,"W")},"Shift-W":function(a){r(a,"Shift-W")},X:function(a){r(a,"X")},"Shift-X":function(a){r(a,"Shift-X")},Y:function(a){r(a,"Y")},"Shift-Y":function(a){r(a,"Shift-Y")},Z:function(a){r(a,"Z")},"Shift-Z":function(a){r(a,"Shift-Z")},auto:"vim",catchall:function(a){}},CodeMirror.key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-CodeMirror.defineMode("css", function(config) {
-    var indentUnit = config.indentUnit, type;
-
-    var atMediaTypes = keySet([
-        "all", "aural", "braille", "handheld", "print", "projection", "screen",
-        "tty", "tv", "embossed"
-    ]);
-
-    var atMediaFeatures = keySet([
-        "width", "min-width", "max-width", "height", "min-height", "max-height",
-        "device-width", "min-device-width", "max-device-width", "device-height",
-        "min-device-height", "max-device-height", "aspect-ratio",
-        "min-aspect-ratio", "max-aspect-ratio", "device-aspect-ratio",
-        "min-device-aspect-ratio", "max-device-aspect-ratio", "color", "min-color",
-        "max-color", "color-index", "min-color-index", "max-color-index",
-        "monochrome", "min-monochrome", "max-monochrome", "resolution",
-        "min-resolution", "max-resolution", "scan", "grid"
-    ]);
-
-    var propertyKeywords = keySet([
-        "align-content", "align-items", "align-self", "alignment-adjust",
-        "alignment-baseline", "anchor-point", "animation", "animation-delay",
-        "animation-direction", "animation-duration", "animation-iteration-count",
-        "animation-name", "animation-play-state", "animation-timing-function",
-        "appearance", "azimuth", "backface-visibility", "background",
-        "background-attachment", "background-clip", "background-color",
-        "background-image", "background-origin", "background-position",
-        "background-repeat", "background-size", "baseline-shift", "binding",
-        "bleed", "bookmark-label", "bookmark-level", "bookmark-state",
-        "bookmark-target", "border", "border-bottom", "border-bottom-color",
-        "border-bottom-left-radius", "border-bottom-right-radius",
-        "border-bottom-style", "border-bottom-width", "border-collapse",
-        "border-color", "border-image", "border-image-outset",
-        "border-image-repeat", "border-image-slice", "border-image-source",
-        "border-image-width", "border-left", "border-left-color",
-        "border-left-style", "border-left-width", "border-radius", "border-right",
-        "border-right-color", "border-right-style", "border-right-width",
-        "border-spacing", "border-style", "border-top", "border-top-color",
-        "border-top-left-radius", "border-top-right-radius", "border-top-style",
-        "border-top-width", "border-width", "bottom", "box-decoration-break",
-        "box-shadow", "box-sizing", "break-after", "break-before", "break-inside",
-        "caption-side", "clear", "clip", "color", "color-profile", "column-count",
-        "column-fill", "column-gap", "column-rule", "column-rule-color",
-        "column-rule-style", "column-rule-width", "column-span", "column-width",
-        "columns", "content", "counter-increment", "counter-reset", "crop", "cue",
-        "cue-after", "cue-before", "cursor", "direction", "display",
-        "dominant-baseline", "drop-initial-after-adjust",
-        "drop-initial-after-align", "drop-initial-before-adjust",
-        "drop-initial-before-align", "drop-initial-size", "drop-initial-value",
-        "elevation", "empty-cells", "fit", "fit-position", "flex", "flex-basis",
-        "flex-direction", "flex-flow", "flex-grow", "flex-shrink", "flex-wrap",
-        "float", "float-offset", "font", "font-feature-settings", "font-family",
-        "font-kerning", "font-language-override", "font-size", "font-size-adjust",
-        "font-stretch", "font-style", "font-synthesis", "font-variant",
-        "font-variant-alternates", "font-variant-caps", "font-variant-east-asian",
-        "font-variant-ligatures", "font-variant-numeric", "font-variant-position",
-        "font-weight", "grid-cell", "grid-column", "grid-column-align",
-        "grid-column-sizing", "grid-column-span", "grid-columns", "grid-flow",
-        "grid-row", "grid-row-align", "grid-row-sizing", "grid-row-span",
-        "grid-rows", "grid-template", "hanging-punctuation", "height", "hyphens",
-        "icon", "image-orientation", "image-rendering", "image-resolution",
-        "inline-box-align", "justify-content", "left", "letter-spacing",
-        "line-break", "line-height", "line-stacking", "line-stacking-ruby",
-        "line-stacking-shift", "line-stacking-strategy", "list-style",
-        "list-style-image", "list-style-position", "list-style-type", "margin",
-        "margin-bottom", "margin-left", "margin-right", "margin-top",
-        "marker-offset", "marks", "marquee-direction", "marquee-loop",
-        "marquee-play-count", "marquee-speed", "marquee-style", "max-height",
-        "max-width", "min-height", "min-width", "move-to", "nav-down", "nav-index",
-        "nav-left", "nav-right", "nav-up", "opacity", "order", "orphans", "outline",
-        "outline-color", "outline-offset", "outline-style", "outline-width",
-        "overflow", "overflow-style", "overflow-wrap", "overflow-x", "overflow-y",
-        "padding", "padding-bottom", "padding-left", "padding-right", "padding-top",
-        "page", "page-break-after", "page-break-before", "page-break-inside",
-        "page-policy", "pause", "pause-after", "pause-before", "perspective",
-        "perspective-origin", "pitch", "pitch-range", "play-during", "position",
-        "presentation-level", "punctuation-trim", "quotes", "rendering-intent",
-        "resize", "rest", "rest-after", "rest-before", "richness", "right",
-        "rotation", "rotation-point", "ruby-align", "ruby-overhang",
-        "ruby-position", "ruby-span", "size", "speak", "speak-as", "speak-header",
-        "speak-numeral", "speak-punctuation", "speech-rate", "stress", "string-set",
-        "tab-size", "table-layout", "target", "target-name", "target-new",
-        "target-position", "text-align", "text-align-last", "text-decoration",
-        "text-decoration-color", "text-decoration-line", "text-decoration-skip",
-        "text-decoration-style", "text-emphasis", "text-emphasis-color",
-        "text-emphasis-position", "text-emphasis-style", "text-height",
-        "text-indent", "text-justify", "text-outline", "text-shadow",
-        "text-space-collapse", "text-transform", "text-underline-position",
-        "text-wrap", "top", "transform", "transform-origin", "transform-style",
-        "transition", "transition-delay", "transition-duration",
-        "transition-property", "transition-timing-function", "unicode-bidi",
-        "vertical-align", "visibility", "voice-balance", "voice-duration",
-        "voice-family", "voice-pitch", "voice-range", "voice-rate", "voice-stress",
-        "voice-volume", "volume", "white-space", "widows", "width", "word-break",
-        "word-spacing", "word-wrap", "z-index"
-    ]);
-
-    var colorKeywords = keySet([
-        "black", "silver", "gray", "white", "maroon", "red", "purple", "fuchsia",
-        "green", "lime", "olive", "yellow", "navy", "blue", "teal", "aqua"
-    ]);
-
-    var valueKeywords = keySet([
-        "above", "absolute", "activeborder", "activecaption", "afar",
-        "after-white-space", "ahead", "alias", "all", "all-scroll", "alternate",
-        "always", "amharic", "amharic-abegede", "antialiased", "appworkspace",
-        "arabic-indic", "armenian", "asterisks", "auto", "avoid", "background",
-        "backwards", "baseline", "below", "bidi-override", "binary", "bengali",
-        "blink", "block", "block-axis", "bold", "bolder", "border", "border-box",
-        "both", "bottom", "break-all", "break-word", "button", "button-bevel",
-        "buttonface", "buttonhighlight", "buttonshadow", "buttontext", "cambodian",
-        "capitalize", "caps-lock-indicator", "caption", "captiontext", "caret",
-        "cell", "center", "checkbox", "circle", "cjk-earthly-branch",
-        "cjk-heavenly-stem", "cjk-ideographic", "clear", "clip", "close-quote",
-        "col-resize", "collapse", "compact", "condensed", "contain", "content",
-        "content-box", "context-menu", "continuous", "copy", "cover", "crop",
-        "cross", "crosshair", "currentcolor", "cursive", "dashed", "decimal",
-        "decimal-leading-zero", "default", "default-button", "destination-atop",
-        "destination-in", "destination-out", "destination-over", "devanagari",
-        "disc", "discard", "document", "dot-dash", "dot-dot-dash", "dotted",
-        "double", "down", "e-resize", "ease", "ease-in", "ease-in-out", "ease-out",
-        "element", "ellipsis", "embed", "end", "ethiopic", "ethiopic-abegede",
-        "ethiopic-abegede-am-et", "ethiopic-abegede-gez", "ethiopic-abegede-ti-er",
-        "ethiopic-abegede-ti-et", "ethiopic-halehame-aa-er",
-        "ethiopic-halehame-aa-et", "ethiopic-halehame-am-et",
-        "ethiopic-halehame-gez", "ethiopic-halehame-om-et",
-        "ethiopic-halehame-sid-et", "ethiopic-halehame-so-et",
-        "ethiopic-halehame-ti-er", "ethiopic-halehame-ti-et",
-        "ethiopic-halehame-tig", "ew-resize", "expanded", "extra-condensed",
-        "extra-expanded", "fantasy", "fast", "fill", "fixed", "flat", "footnotes",
-        "forwards", "from", "geometricPrecision", "georgian", "graytext", "groove",
-        "gujarati", "gurmukhi", "hand", "hangul", "hangul-consonant", "hebrew",
-        "help", "hidden", "hide", "higher", "highlight", "highlighttext",
-        "hiragana", "hiragana-iroha", "horizontal", "hsl", "hsla", "icon", "ignore",
-        "inactiveborder", "inactivecaption", "inactivecaptiontext", "infinite",
-        "infobackground", "infotext", "inherit", "initial", "inline", "inline-axis",
-        "inline-block", "inline-table", "inset", "inside", "intrinsic", "invert",
-        "italic", "justify", "kannada", "katakana", "katakana-iroha", "khmer",
-        "landscape", "lao", "large", "larger", "left", "level", "lighter",
-        "line-through", "linear", "lines", "list-item", "listbox", "listitem",
-        "local", "logical", "loud", "lower", "lower-alpha", "lower-armenian",
-        "lower-greek", "lower-hexadecimal", "lower-latin", "lower-norwegian",
-        "lower-roman", "lowercase", "ltr", "malayalam", "match",
-        "media-controls-background", "media-current-time-display",
-        "media-fullscreen-button", "media-mute-button", "media-play-button",
-        "media-return-to-realtime-button", "media-rewind-button",
-        "media-seek-back-button", "media-seek-forward-button", "media-slider",
-        "media-sliderthumb", "media-time-remaining-display", "media-volume-slider",
-        "media-volume-slider-container", "media-volume-sliderthumb", "medium",
-        "menu", "menulist", "menulist-button", "menulist-text",
-        "menulist-textfield", "menutext", "message-box", "middle", "min-intrinsic",
-        "mix", "mongolian", "monospace", "move", "multiple", "myanmar", "n-resize",
-        "narrower", "navy", "ne-resize", "nesw-resize", "no-close-quote", "no-drop",
-        "no-open-quote", "no-repeat", "none", "normal", "not-allowed", "nowrap",
-        "ns-resize", "nw-resize", "nwse-resize", "oblique", "octal", "open-quote",
-        "optimizeLegibility", "optimizeSpeed", "oriya", "oromo", "outset",
-        "outside", "overlay", "overline", "padding", "padding-box", "painted",
-        "paused", "persian", "plus-darker", "plus-lighter", "pointer", "portrait",
-        "pre", "pre-line", "pre-wrap", "preserve-3d", "progress", "push-button",
-        "radio", "read-only", "read-write", "read-write-plaintext-only", "relative",
-        "repeat", "repeat-x", "repeat-y", "reset", "reverse", "rgb", "rgba",
-        "ridge", "right", "round", "row-resize", "rtl", "run-in", "running",
-        "s-resize", "sans-serif", "scroll", "scrollbar", "se-resize", "searchfield",
-        "searchfield-cancel-button", "searchfield-decoration",
-        "searchfield-results-button", "searchfield-results-decoration",
-        "semi-condensed", "semi-expanded", "separate", "serif", "show", "sidama",
-        "single", "skip-white-space", "slide", "slider-horizontal",
-        "slider-vertical", "sliderthumb-horizontal", "sliderthumb-vertical", "slow",
-        "small", "small-caps", "small-caption", "smaller", "solid", "somali",
-        "source-atop", "source-in", "source-out", "source-over", "space", "square",
-        "square-button", "start", "static", "status-bar", "stretch", "stroke",
-        "sub", "subpixel-antialiased", "super", "sw-resize", "table",
-        "table-caption", "table-cell", "table-column", "table-column-group",
-        "table-footer-group", "table-header-group", "table-row", "table-row-group",
-        "telugu", "text", "text-bottom", "text-top", "textarea", "textfield", "thai",
-        "thick", "thin", "threeddarkshadow", "threedface", "threedhighlight",
-        "threedlightshadow", "threedshadow", "tibetan", "tigre", "tigrinya-er",
-        "tigrinya-er-abegede", "tigrinya-et", "tigrinya-et-abegede", "to", "top",
-        "transparent", "ultra-condensed", "ultra-expanded", "underline", "up",
-        "upper-alpha", "upper-armenian", "upper-greek", "upper-hexadecimal",
-        "upper-latin", "upper-norwegian", "upper-roman", "uppercase", "urdu", "url",
-        "vertical", "vertical-text", "visible", "visibleFill", "visiblePainted",
-        "visibleStroke", "visual", "w-resize", "wait", "wave", "white", "wider",
-        "window", "windowframe", "windowtext", "x-large", "x-small", "xor",
-        "xx-large", "xx-small", "yellow"
-    ]);
-
-    function keySet(array) { var keys = {}; for (var i = 0; i < array.length; ++i) keys[array[i]] = true; return keys; }
-    function ret(style, tp) {type = tp; return style;}
-
-    function tokenBase(stream, state) {
-        var ch = stream.next();
-        if (ch == "@") {stream.eatWhile(/[\w\\\-]/); return ret("def", stream.current());}
-        else if (ch == "/" && stream.eat("*")) {
-            state.tokenize = tokenCComment;
-            return tokenCComment(stream, state);
-        }
-        else if (ch == "<" && stream.eat("!")) {
-            state.tokenize = tokenSGMLComment;
-            return tokenSGMLComment(stream, state);
-        }
-        else if (ch == "=") ret(null, "compare");
-        else if ((ch == "~" || ch == "|") && stream.eat("=")) return ret(null, "compare");
-        else if (ch == "\"" || ch == "'") {
-            state.tokenize = tokenString(ch);
-            return state.tokenize(stream, state);
-        }
-        else if (ch == "#") {
-            stream.eatWhile(/[\w\\\-]/);
-            return ret("atom", "hash");
-        }
-        else if (ch == "!") {
-            stream.match(/^\s*\w*/);
-            return ret("keyword", "important");
-        }
-        else if (/\d/.test(ch)) {
-            stream.eatWhile(/[\w.%]/);
-            return ret("number", "unit");
-        }
-        else if (ch === "-") {
-            if (/\d/.test(stream.peek())) {
-                stream.eatWhile(/[\w.%]/);
-                return ret("number", "unit");
-            } else if (stream.match(/^[^-]+-/)) {
-                return ret("meta", type);
-            }
-        }
-        else if (/[,+>*\/]/.test(ch)) {
-            return ret(null, "select-op");
-        }
-        else if (ch == "." && stream.match(/^-?[_a-z][_a-z0-9-]*/i)) {
-            return ret("qualifier", type);
-        }
-        else if (ch == ":") {
-            return ret("operator", ch);
-        }
-        else if (/[;{}\[\]\(\)]/.test(ch)) {
-            return ret(null, ch);
-        }
-        else {
-            stream.eatWhile(/[\w\\\-]/);
-            return ret("property", "variable");
-        }
-    }
-
-    function tokenCComment(stream, state) {
-        var maybeEnd = false, ch;
-        while ((ch = stream.next()) != null) {
-            if (maybeEnd && ch == "/") {
-                state.tokenize = tokenBase;
-                break;
-            }
-            maybeEnd = (ch == "*");
-        }
-        return ret("comment", "comment");
-    }
-
-    function tokenSGMLComment(stream, state) {
-        var dashes = 0, ch;
-        while ((ch = stream.next()) != null) {
-            if (dashes >= 2 && ch == ">") {
-                state.tokenize = tokenBase;
-                break;
-            }
-            dashes = (ch == "-") ? dashes + 1 : 0;
-        }
-        return ret("comment", "comment");
-    }
-
-    function tokenString(quote) {
-        return function(stream, state) {
-            var escaped = false, ch;
-            while ((ch = stream.next()) != null) {
-                if (ch == quote && !escaped)
-                    break;
-                escaped = !escaped && ch == "\\";
-            }
-            if (!escaped) state.tokenize = tokenBase;
-            return ret("string", "string");
-        };
-    }
-
-    return {
-        startState: function(base) {
-            return {tokenize: tokenBase,
-                baseIndent: base || 0,
-                stack: []};
-        },
-
-        token: function(stream, state) {
-
-            // Use these terms when applicable (see http://www.xanthir.com/blog/b4E50)
-            //
-            // rule** or **ruleset:
-            // A selector + braces combo, or an at-rule.
-            //
-            // declaration block:
-            // A sequence of declarations.
-            //
-            // declaration:
-            // A property + colon + value combo.
-            //
-            // property value:
-            // The entire value of a property.
-            //
-            // component value:
-            // A single piece of a property value. Like the 5px in
-            // text-shadow: 0 0 5px blue;. Can also refer to things that are
-            // multiple terms, like the 1-4 terms that make up the background-size
-            // portion of the background shorthand.
-            //
-            // term:
-            // The basic unit of author-facing CSS, like a single number (5),
-            // dimension (5px), string ("foo"), or function. Officially defined
-            //  by the CSS 2.1 grammar (look for the 'term' production)
-            //
-            //
-            // simple selector:
-            // A single atomic selector, like a type selector, an attr selector, a
-            // class selector, etc.
-            //
-            // compound selector:
-            // One or more simple selectors without a combinator. div.example is
-            // compound, div > .example is not.
-            //
-            // complex selector:
-            // One or more compound selectors chained with combinators.
-            //
-            // combinator:
-            // The parts of selectors that express relationships. There are four
-            // currently - the space (descendant combinator), the greater-than
-            // bracket (child combinator), the plus sign (next sibling combinator),
-            // and the tilda (following sibling combinator).
-            //
-            // sequence of selectors:
-            // One or more of the named type of selector chained with commas.
-
-            if (stream.eatSpace()) return null;
-            var style = state.tokenize(stream, state);
-
-            // Changing style returned based on context
-            var context = state.stack[state.stack.length-1];
-            if (style == "property") {
-                if (context == "propertyValue"){
-                    if (valueKeywords[stream.current()]) {
-                        style = "string-2";
-                    } else if (colorKeywords[stream.current()]) {
-                        style = "keyword";
-                    } else {
-                        style = "variable-2";
-                    }
-                } else if (context == "rule") {
-                    if (!propertyKeywords[stream.current()]) {
-                        style += " error";
-                    }
-                } else if (!context || context == "@media{") {
-                    style = "tag";
-                } else if (context == "@media") {
-                    if (atMediaTypes[stream.current()]) {
-                        style = "attribute"; // Known attribute
-                    } else if (/^(only|not)$/i.test(stream.current())) {
-                        style = "keyword";
-                    } else if (stream.current().toLowerCase() == "and") {
-                        style = "error"; // "and" is only allowed in @mediaType
-                    } else if (atMediaFeatures[stream.current()]) {
-                        style = "error"; // Known property, should be in @mediaType(
-                    } else {
-                        // Unknown, expecting keyword or attribute, assuming attribute
-                        style = "attribute error";
-                    }
-                } else if (context == "@mediaType") {
-                    if (atMediaTypes[stream.current()]) {
-                        style = "attribute";
-                    } else if (stream.current().toLowerCase() == "and") {
-                        style = "operator";
-                    } else if (/^(only|not)$/i.test(stream.current())) {
-                        style = "error"; // Only allowed in @media
-                    } else if (atMediaFeatures[stream.current()]) {
-                        style = "error"; // Known property, should be in parentheses
-                    } else {
-                        // Unknown attribute or property, but expecting property (preceded
-                        // by "and"). Should be in parentheses
-                        style = "error";
-                    }
-                } else if (context == "@mediaType(") {
-                    if (propertyKeywords[stream.current()]) {
-                        // do nothing, remains "property"
-                    } else if (atMediaTypes[stream.current()]) {
-                        style = "error"; // Known property, should be in parentheses
-                    } else if (stream.current().toLowerCase() == "and") {
-                        style = "operator";
-                    } else if (/^(only|not)$/i.test(stream.current())) {
-                        style = "error"; // Only allowed in @media
-                    } else {
-                        style += " error";
-                    }
-                } else {
-                    style = "error";
-                }
-            } else if (style == "atom") {
-                if(!context || context == "@media{") {
-                    style = "builtin";
-                } else if (context == "propertyValue") {
-                    if (!/^#([0-9a-fA-f]{3}|[0-9a-fA-f]{6})$/.test(stream.current())) {
-                        style += " error";
-                    }
-                } else {
-                    style = "error";
-                }
-            } else if (context == "@media" && type == "{") {
-                style = "error";
-            }
-
-            // Push/pop context stack
-            if (type == "{") {
-                if (context == "@media" || context == "@mediaType") {
-                    state.stack.pop();
-                    state.stack[state.stack.length-1] = "@media{";
-                }
-                else state.stack.push("rule");
-            }
-            else if (type == "}") {
-                state.stack.pop();
-                if (context == "propertyValue") state.stack.pop();
-            }
-            else if (type == "@media") state.stack.push("@media");
-            else if (context == "@media" && /\b(keyword|attribute)\b/.test(style))
-                state.stack.push("@mediaType");
-            else if (context == "@mediaType" && stream.current() == ",") state.stack.pop();
-            else if (context == "@mediaType" && type == "(") state.stack.push("@mediaType(");
-            else if (context == "@mediaType(" && type == ")") state.stack.pop();
-            else if (context == "rule" && type == ":") state.stack.push("propertyValue");
-            else if (context == "propertyValue" && type == ";") state.stack.pop();
-            return style;
-        },
-
-        indent: function(state, textAfter) {
-            var n = state.stack.length;
-            if (/^\}/.test(textAfter))
-                n -= state.stack[state.stack.length-1] == "propertyValue" ? 2 : 1;
-            return state.baseIndent + n * indentUnit;
-        },
-
-        electricChars: "}"
-    };
-});
-
-CodeMirror.defineMIME("text/css", "css");
+// CodeMirror is the only global var we claim
+window.CodeMirror=function(){"use strict";function T(e,n){if(!(this instanceof T))return new T(e,n);this.options=n=n||{};for(var r in ir)!n.hasOwnProperty(r)&&ir.hasOwnProperty(r)&&(n[r]=ir[r]);j(n);var i=typeof n.value=="string"?0:n.value.first,s=this.display=N(e,i);s.wrapper.CodeMirror=this,P(this),n.autofocus&&!m&&Rt(this),this.state={keyMaps:[],overlays:[],modeGen:0,overwrite:!1,focused:!1,suppressEdits:!1,pasteIncoming:!1,cutIncoming:!1,draggingText:!1,highlight:new us},_(this),n.lineWrapping&&(this.display.wrapper.className+=" CodeMirror-wrap");var o=n.value;typeof o=="string"&&(o=new yi(n.value,n.mode)),Dt(this,Si)(this,o),t&&setTimeout(gs(qt,this,!0),20),zt(this);var u;try{u=document.activeElement==s.input}catch(a){}u||n.autofocus&&!m?setTimeout(gs(vn,this),20):mn(this),Dt(this,function(){for(var e in rr)rr.propertyIsEnumerable(e)&&rr[e](this,n[e],or);for(var t=0;tt.maxLineLength&&(t.maxLineLength=r,t.maxLine=e)})}function j(e){var t=ps(e.gutters,"CodeMirror-linenumbers");t==-1&&e.lineNumbers?e.gutters=e.gutters.concat(["CodeMirror-linenumbers"]):t>-1&&!e.lineNumbers&&(e.gutters=e.gutters.slice(0),e.gutters.splice(t,1))}function F(e){var t=e.display,n=e.doc.height,r=n+at(t);t.sizer.style.minHeight=t.heightForcer.style.top=r+"px",t.gutters.style.height=Math.max(r,t.scroller.clientHeight-ss)+"px";var i=Math.max(r,t.scroller.scrollHeight),s=t.scroller.scrollWidth>t.scroller.clientWidth+1,o=i>t.scroller.clientHeight+1;o?(t.scrollbarV.style.display="block",t.scrollbarV.style.bottom=s?Ms(t.measure)+"px":"0",t.scrollbarV.firstChild.style.height=i-t.scroller.clientHeight+t.scrollbarV.clientHeight+"px"):(t.scrollbarV.style.display="",t.scrollbarV.firstChild.style.height="0"),s?(t.scrollbarH.style.display="block",t.scrollbarH.style.right=o?Ms(t.measure)+"px":"0",t.scrollbarH.firstChild.style.width=t.scroller.scrollWidth-t.scroller.clientWidth+t.scrollbarH.clientWidth+"px"):(t.scrollbarH.style.display="",t.scrollbarH.firstChild.style.width="0"),s&&o?(t.scrollbarFiller.style.display="block",t.scrollbarFiller.style.height=t.scrollbarFiller.style.width=Ms(t.measure)+"px"):t.scrollbarFiller.style.display="",s&&e.options.coverGutterNextToScrollbar&&e.options.fixedGutter?(t.gutterFiller.style.display="block",t.gutterFiller.style.height=Ms(t.measure)+"px",t.gutterFiller.style.width=t.gutters.offsetWidth+"px"):t.gutterFiller.style.display="",h&&Ms(t.measure)===0&&(t.scrollbarV.style.minWidth=t.scrollbarH.style.minHeight=p?"18px":"12px",t.scrollbarV.style.pointerEvents=t.scrollbarH.style.pointerEvents="none")}function I(e,t,n){var r=e.scroller.scrollTop,i=e.wrapper.clientHeight;typeof n=="number"?r=n:n&&(r=n.top,i=n.bottom-n.top),r=Math.floor(r-ut(e));var s=Math.ceil(r+i);return{from:Li(t,r),to:Li(t,s)}}function q(e){var t=e.display;if(!t.alignWidgets&&(!t.gutters.firstChild||!e.options.fixedGutter))return;var n=z(t)-t.scroller.scrollLeft+e.doc.scrollLeft,r=t.gutters.offsetWidth,i=n+"px";for(var s=t.lineDiv.firstChild;s;s=s.nextSibling)if(s.alignable)for(var o=0,u=s.alignable;o=e.display.showingFrom&&u.to<=e.display.showingTo)break}return o&&(es(e,"update",e),(e.display.showingFrom!=i||e.display.showingTo!=s)&&es(e,"viewportChange",e,e.display.showingFrom,e.display.showingTo)),o}function X(e,t,n,r){var i=e.display,s=e.doc;if(!i.wrapper.offsetWidth){i.showingFrom=i.showingTo=s.first,i.viewOffset=0;return}if(!r&&t.length==0&&n.from>i.showingFrom&&n.toc&&i.showingTo-c<20&&(c=Math.min(f,i.showingTo));if(x){l=ki(Ur(s,xi(s,l)));while(c=h[0].to?h=[]:h=J(h,t);if(x)for(var a=0;ap.from)){h.splice(a--,1);break}p.to=v}}var m=0;for(var a=0;ac&&(p.to=c),p.from>=p.to?h.splice(a--,1):m+=p.to-p.from}if(!r&&m==c-l&&l==i.showingFrom&&c==i.showingTo){$(e);return}h.sort(function(e,t){return e.from-t.from});try{var g=document.activeElement}catch(y){}m<(c-l)*.7&&(i.lineDiv.style.display="none"),Q(e,l,c,h,u),i.lineDiv.style.display="",g&&document.activeElement!=g&&g.offsetHeight&&g.focus();var b=l!=i.showingFrom||c!=i.showingTo||i.lastSizeC!=i.wrapper.clientHeight;return b&&(i.lastSizeC=i.wrapper.clientHeight,rt(e,400)),i.showingFrom=l,i.showingTo=c,i.gutters.style.height="",V(e),$(e),!0}function V(e){var t=e.display,r=t.lineDiv.offsetTop;for(var i=t.lineDiv.firstChild,s;i;i=i.nextSibling)if(i.lineObj){if(n){var o=i.offsetTop+i.offsetHeight;s=o-r,r=o}else{var u=ks(i);s=u.bottom-u.top}var a=i.lineObj.height-s;s<2&&(s=Lt(t));if(a>.001||a<-0.001){Ci(i.lineObj,s);var f=i.lineObj.widgets;if(f)for(var l=0;l=f.to?s.push(f):(i.from>f.from&&s.push({from:f.from,to:i.from}),i.top){while(l.lineObj!=t)l=c(l);a&&i<=p&&l.lineNumber&&Cs(l.lineNumber,U(e.options,p)),l=l.nextSibling}else{if(t.widgets)for(var m=0,g=l,y;g&&m<20;++m,g=g.nextSibling)if(g.lineObj==t&&/div/i.test(g.nodeName)){y=g;break}var b=G(e,t,p,s,y);if(b!=y)f.insertBefore(b,l);else{while(l!=y)l=c(l);l=l.nextSibling}b.lineObj=t}++p});while(l)l=c(l)}function G(e,t,r,i,s){var o=ui(e,t),u=o.pre,a=t.gutterMarkers,f=e.display,l,c=o.bgClass?o.bgClass+" "+(t.bgClass||""):t.bgClass;if(!e.options.lineNumbers&&!a&&!c&&!t.wrapClass&&!t.widgets)return u;if(s){s.alignable=null;var h=!0,p=0,d=null;for(var v=s.firstChild,m;v;v=m){m=v.nextSibling;if(!/\bCodeMirror-linewidget\b/.test(v.className))s.removeChild(v);else{for(var g=0;g3&&(u(d,a.top,null,a.bottom),d=o,a.bottomc.bottom||p.bottom==c.bottom&&p.right>c.right)c=p;d0&&(t.blinker=setInterval(function(){t.cursor.style.visibility=t.otherCursor.style.visibility=(n=!n)?"":"hidden"},e.options.cursorBlinkRate))}function rt(e,t){e.doc.mode.startState&&e.doc.frontier=e.display.showingTo)return;var n=+(new Date)+e.options.workTime,r=hr(t.mode,ot(e,t.frontier)),i=[],s;t.iter(t.frontier,Math.min(t.first+t.size,e.display.showingTo+500),function(o){if(t.frontier>=e.display.showingFrom){var u=o.styles;o.styles=ti(e,o,r,!0);var a=!u||u.length!=o.styles.length;for(var f=0;!a&&fn)return rt(e,e.options.workDelay),!0}),i.length&&Dt(e,function(){for(var e=0;eo;--u){if(u<=s.first)return s.first;var a=xi(s,u-1);if(a.stateAfter&&(!n||u<=s.frontier))return u;var f=as(a.text,null,e.options.tabSize);if(i==null||r>f)i=u-1,r=f}return i}function ot(e,t,n){var r=e.doc,i=e.display;if(!r.mode.startState)return!0;var s=st(e,t,n),o=s>r.first&&xi(r,s-1).stateAfter;return o?o=hr(r.mode,o):o=pr(r.mode),r.iter(s,t,function(n){ri(e,n.text,o);var u=s==t-1||s%5==0||s>=i.showingFrom&&sn?"left":un?a.left:a.right,top:a.top,bottom:a.bottom}}function ct(e,t){var n=e.display.measureLineCache;for(var r=0;ry&&(n=y),t<0&&(t=0);for(var r=m.length-2;r>=0;r-=2){var i=m[r],s=m[r+1];if(i>n||s=n||t<=i&&n>=s||Math.min(n,s)-Math.max(t,i)>=n-t>>1){m[r]=Math.min(t,i),m[r+1]=Math.max(n,s);break}}return r<0&&(r=m.length,m.push(t,n)),{left:e.left-v.left,right:e.right-v.left,top:r,bottom:null}}function w(e){e.bottom=m[e.top+1],e.top=m[e.top]}if(!e.options.lineWrapping&&i.text.length>=e.options.crudeMeasuringFrom)return vt(e,i);var s=e.display,o=ms(i.text.length),u=ui(e,i,o,!0).pre;if(t&&!n&&!e.options.lineWrapping&&u.childNodes.length>100){var a=document.createDocumentFragment(),f=10,l=u.childNodes.length;for(var c=0,h=Math.ceil(l/f);c1&&(x=g[c]=b(T[0]),x.rightSide=b(T[T.length-1]))}x||(x=g[c]=b(ks(S))),E.measureRight&&(x.right=ks(E.measureRight).left-v.left),E.leftSide&&(x.leftSide=b(ks(E.leftSide)))}Ts(e.display.measure);for(var c=0,E;c=e.options.crudeMeasuringFrom)return lt(e,t,t.text.length,s&&s.measure,"right").right;var o=ui(e,t,null,!0).pre,u=o.appendChild(Ds(e.display.measure));return Ns(e.display.measure,o),ks(u).right-ks(e.display.lineDiv).left}function gt(e){e.display.measureLineCache.length=e.display.measureLineCachePos=0,e.display.cachedCharWidth=e.display.cachedTextHeight=null,e.options.lineWrapping||(e.display.maxLineChanged=!0),e.display.lineNumChars=null}function yt(){return window.pageXOffset||(document.documentElement||document.body).scrollLeft}function bt(){return window.pageYOffset||(document.documentElement||document.body).scrollTop}function wt(e,t,n,r){if(t.widgets)for(var i=0;in.from?s(e-1):s(e,r)}r=r||xi(e.doc,t.line),i||(i=pt(e,r));var u=Oi(r),a=t.ch;if(!u)return s(a);var f=$s(u,a),l=o(a,f);return Vs!=null&&(l.other=o(a,Vs)),l}function Tt(e,t,n,r){var i=new On(e,t);return i.xRel=r,n&&(i.outside=!0),i}function Nt(e,t,n){var r=e.doc;n+=e.display.viewOffset;if(n<0)return Tt(r.first,0,!0,-1);var i=Li(r,n),s=r.first+r.size-1;if(i>s)return Tt(r.first+r.size-1,xi(r,s).text.length,!0,1);t<0&&(t=0);for(;;){var o=xi(r,i),u=Ct(e,o,i,t,n),a=qr(o),f=a&&a.find();if(!a||!(u.ch>f.from.ch||u.ch==f.from.ch&&u.xRel>0))return u;i=f.to.line}}function Ct(e,t,n,r,i){function f(r){var i=xt(e,On(n,r),"line",t,a);return o=!0,s>i.bottom?i.left-u:sm)return Tt(n,p,g,1);for(;;){if(l?p==h||p==Ks(t,h,1):p-h<=1){var y=rr){p=S,m=T;if(g=o)m+=1e3;c=E}else h=S,d=T,v=o,c-=E}}function Lt(e){if(e.cachedTextHeight!=null)return e.cachedTextHeight;if(kt==null){kt=xs("pre");for(var t=0;t<49;++t)kt.appendChild(document.createTextNode("x")),kt.appendChild(xs("br"));kt.appendChild(document.createTextNode("x"))}Ns(e.measure,kt);var n=kt.offsetHeight/50;return n>3&&(e.cachedTextHeight=n),Ts(e.measure),n||1}function At(e){if(e.cachedCharWidth!=null)return e.cachedCharWidth;var t=xs("span","x"),n=xs("pre",[t]);Ns(e.measure,n);var r=t.offsetWidth;return r>2&&(e.cachedCharWidth=r),r||10}function Mt(e){e.curOp={changes:[],forceUpdate:!1,updateInput:null,userSelChange:null,textChanged:null,selectionChanged:!1,cursorActivity:!1,updateMaxLine:!1,updateScrollPos:!1,id:++Ot},Zi++||(Yi=[])}function _t(e){var t=e.curOp,n=e.doc,r=e.display;e.curOp=null,t.updateMaxLine&&B(e);if(r.maxLineChanged&&!e.options.lineWrapping&&r.maxLine){var i=mt(e,r.maxLine);r.sizer.style.minWidth=Math.max(0,i+3+ss)+"px",r.maxLineChanged=!1;var s=Math.max(0,r.sizer.offsetLeft+r.sizer.offsetWidth-r.scroller.clientWidth);s-1){Gn(e,o.head.line,"smart");break}}return u.length>1e3||u.indexOf("\n")>-1?t.value=e.display.prevInput="":e.display.prevInput=u,a&&_t(e),e.state.pasteIncoming=e.state.cutIncoming=!1,!0}function qt(e,t){var n,i,o=e.doc;if(!Mn(o.sel.from,o.sel.to)){e.display.prevInput="",n=!1;var u=n?"-":i||e.getSelection();e.display.input.value=u,e.state.focused&&hs(e.display.input),s&&!r&&(e.display.inputHasSelection=u)}else t&&!e.state.accessibleTextareaWaiting&&(e.display.prevInput=e.display.input.value="",s&&!r&&(e.display.inputHasSelection=null));e.display.inaccurateSelection=n}function Rt(e){e.options.readOnly!="nocursor"&&(!m||document.activeElement!=e.display.input)&&e.display.input.focus()}function Ut(e){return e.options.readOnly||e.doc.cantEdit}function zt(e){function i(){e.state.focused&&setTimeout(gs(Rt,e),0)}function a(){u==null&&(u=setTimeout(function(){u=null,n.cachedCharWidth=n.cachedTextHeight=Os=null,gt(e),Ht(e,gs(Bt,e))},100))}function f(){for(var e=n.wrapper.parentNode;e&&e!=document.body;e=e.parentNode);e?setTimeout(f,5e3):Qi(window,"resize",a)}function l(t){if(ts(e,t)||e.options.onDragEvent&&e.options.onDragEvent(e,Ui(t)))return;Vi(t)}function h(t){n.inaccurateSelection&&(n.prevInput="",n.inaccurateSelection=!1,n.input.value=e.getSelection(),hs(n.input)),t.type=="cut"&&(e.state.cutIncoming=!0)}var n=e.display;Ki(n.scroller,"mousedown",Dt(e,Jt)),t?Ki(n.scroller,"dblclick",Dt(e,function(t){if(ts(e,t))return;var n=Xt(e,t);if(!n||Gt(e,t)||Wt(e.display,t))return;zi(t);var r=tr(xi(e.doc,n.line).text,n);In(e.doc,r.from,r.to)})):Ki(n.scroller,"dblclick",function(t){ts(e,t)||zi(t)}),Ki(n.lineSpace,"selectstart",function(e){Wt(n,e)||zi(e)}),E||Ki(n.scroller,"contextmenu",function(t){yn(e,t)}),Ki(n.scroller,"scroll",function(){n.scroller.clientHeight&&(tn(e,n.scroller.scrollTop),nn(e,n.scroller.scrollLeft,!0),Gi(e,"scroll",e))}),Ki(n.scrollbarV,"scroll",function(){n.scroller.clientHeight&&tn(e,n.scrollbarV.scrollTop)}),Ki(n.scrollbarH,"scroll",function(){n.scroller.clientHeight&&nn(e,n.scrollbarH.scrollLeft)}),Ki(n.scroller,"mousewheel",function(t){on(e,t)}),Ki(n.scroller,"DOMMouseScroll",function(t){on(e,t)}),Ki(n.scrollbarH,"mousedown",i),Ki(n.scrollbarV,"mousedown",i),Ki(n.wrapper,"scroll",function(){n.wrapper.scrollTop=n.wrapper.scrollLeft=0});var u;Ki(window,"resize",a),setTimeout(f,5e3),Ki(n.input,"keyup",Dt(e,function(t){if(ts(e,t)||e.options.onKeyEvent&&e.options.onKeyEvent(e,Ui(t)))return;t.keyCode==16&&(e.doc.sel.shift=!1)})),Ki(n.input,"input",function(){s&&!r&&e.display.inputHasSelection&&(e.display.inputHasSelection=null),Ft(e)}),Ki(n.input,"keydown",Dt(e,pn)),Ki(n.input,"keypress",Dt(e,dn)),Ki(n.input,"focus",gs(vn,e)),Ki(n.input,"blur",gs(mn,e)),e.options.dragDrop&&(Ki(n.scroller,"dragstart",function(t){en(e,t)}),Ki(n.scroller,"dragenter",l),Ki(n.scroller,"dragover",l),Ki(n.scroller,"drop",Dt(e,Zt))),Ki(n.scroller,"paste",function(t){if(Wt(n,t))return;Rt(e),Ft(e)}),Ki(n.input,"paste",function(){if(o&&!e.state.fakedLastChar&&!(new Date-e.state.lastMiddleDown<200)){var t=n.input.selectionStart,r=n.input.selectionEnd;n.input.value+="$",n.input.selectionStart=t,n.input.selectionEnd=r,e.state.fakedLastChar=!0}e.state.pasteIncoming=!0,Ft(e)}),Ki(n.input,"cut",h),Ki(n.input,"copy",h),c&&Ki(n.sizer,"mouseup",function(){document.activeElement==n.input&&n.input.blur(),Rt(e)})}function Wt(e,t){for(var n=$i(t);n!=e.wrapper;n=n.parentNode)if(!n||n.ignoreEvents||n.parentNode==e.sizer&&n!=e.mover)return!0}function Xt(e,t,n){var r=e.display;if(!n){var i=$i(t);if(i==r.scrollbarH||i==r.scrollbarH.firstChild||i==r.scrollbarV||i==r.scrollbarV.firstChild||i==r.scrollbarFiller||i==r.gutterFiller)return null}var s,o,u=ks(r.lineSpace);try{s=t.clientX,o=t.clientY}catch(t){return null}return Nt(e,s-u.left,o-u.top)}function Jt(e){function g(e){if(Mn(m,e))return;m=e;if(l=="single"){In(n.doc,Bn(s,a),e);return}d=Bn(s,d),v=Bn(s,v);if(l=="double"){var t=tr(xi(s,e.line).text,e);_n(e,d)?In(n.doc,t.from,v):In(n.doc,d,t.to)}else l=="triple"&&
+(_n(e,d)?In(n.doc,v,Bn(s,On(e.line,0))):In(n.doc,d,Bn(s,On(e.line+1,0))))}function w(e){var t=++b,r=Xt(n,e,!0);if(!r)return;if(!Mn(r,h)){n.state.focused||vn(n),h=r,g(r);var o=I(i,s);(r.line>=o.to||r.liney.bottom?20:0;u&&setTimeout(Dt(n,function(){if(b!=t)return;i.scroller.scrollTop+=u,w(e)}),50)}}function S(e){b=Infinity,zi(e),Rt(n),Qi(document,"mousemove",x),Qi(document,"mouseup",T)}if(ts(this,e))return;var n=this,i=n.display,s=n.doc,u=s.sel;u.shift=e.shiftKey;if(Wt(i,e)){o||(i.scroller.draggable=!1,setTimeout(function(){i.scroller.draggable=!0},100));return}if(Gt(n,e))return;var a=Xt(n,e);switch(Ji(e)){case 3:E&&yn.call(n,n,e);return;case 2:o&&(n.state.lastMiddleDown=+(new Date)),a&&In(n.doc,a),setTimeout(gs(Rt,n),20),zi(e);return}if(!a){$i(e)==i.scroller&&zi(e);return}n.state.focused||vn(n);var f=+(new Date),l="single";if($t&&$t.time>f-400&&Mn($t.pos,a))l="triple",zi(e),setTimeout(gs(Rt,n),20),nr(n,a.line);else if(Vt&&Vt.time>f-400&&Mn(Vt.pos,a)){l="double",$t={time:f,pos:a},zi(e);var c=tr(xi(s,a.line).text,a);In(n.doc,c.from,c.to)}else Vt={time:f,pos:a};var h=a;if(n.options.dragDrop&&Ls&&!Ut(n)&&!Mn(u.from,u.to)&&!_n(a,u.from)&&!_n(u.to,a)&&l=="single"){var p=Dt(n,function(s){o&&(i.scroller.draggable=!1),n.state.draggingText=!1,Qi(document,"mouseup",p),Qi(i.scroller,"drop",p),Math.abs(e.clientX-s.clientX)+Math.abs(e.clientY-s.clientY)<10&&(zi(s),In(n.doc,a),Rt(n),t&&!r&&setTimeout(function(){document.body.focus(),Rt(n)},20))});o&&(i.scroller.draggable=!0),n.state.draggingText=p,i.scroller.dragDrop&&i.scroller.dragDrop(),Ki(document,"mouseup",p),Ki(i.scroller,"drop",p);return}zi(e),l=="single"&&In(n.doc,Bn(s,a));var d=u.from,v=u.to,m=a,y=ks(i.wrapper),b=0,x=Dt(n,function(e){!t&&!Ji(e)?S(e):w(e)}),T=Dt(n,S);Ki(document,"mousemove",x),Ki(document,"mouseup",T)}function Kt(e,t,n,r,i){try{var s=t.clientX,o=t.clientY}catch(t){return!1}if(s>=Math.floor(ks(e.display.gutters).right))return!1;r&&zi(t);var u=e.display,a=ks(u.lineDiv);if(o>a.bottom||!rs(e,n))return Xi(t);o-=a.top-u.viewOffset;for(var f=0;f=s){var c=Li(e.doc,o),h=e.options.gutters[f];return i(e,n,e,c,h,t),Xi(t)}}}function Qt(e,t){return rs(e,"gutterContextMenu")?Kt(e,t,"gutterContextMenu",!1,Gi):!1}function Gt(e,t){return Kt(e,t,"gutterClick",!0,es)}function Zt(e){var t=this;if(ts(t,e)||Wt(t.display,e)||t.options.onDragEvent&&t.options.onDragEvent(t,Ui(e)))return;zi(e),s&&(Yt=+(new Date));var n=Xt(t,e,!0),r=e.dataTransfer.files;if(!n||Ut(t))return;if(r&&r.length&&window.FileReader&&window.File){var i=r.length,o=Array(i),u=0,a=function(e,r){var s=new FileReader;s.onload=function(){o[r]=s.result,++u==i&&(n=Bn(t.doc,n),xn(t.doc,{from:n,to:n,text:Ps(o.join("\n")),origin:"paste"},"around"))},s.readAsText(e)};for(var f=0;fu.clientWidth||i&&u.scrollHeight>u.clientHeight))return;if(i&&g&&o)for(var a=n.target;a!=u;a=a.parentNode)if(a.lineObj){t.display.currentWheelTarget=a;break}if(r&&!e&&!f&&sn!=null){i&&tn(t,Math.max(0,Math.min(u.scrollTop+i*sn,u.scrollHeight-u.clientHeight))),nn(t,Math.max(0,Math.min(u.scrollLeft+r*sn,u.scrollWidth-u.clientWidth))),zi(n),s.wheelStartX=null;return}if(i&&sn!=null){var l=i*sn,c=t.doc.scrollTop,h=c+s.wrapper.clientHeight;l<0?c=Math.max(0,c+l-50):h=Math.min(t.doc.height,h+l+50),W(t,[],{top:c,bottom:h})}rn<20&&(s.wheelStartX==null?(s.wheelStartX=u.scrollLeft,s.wheelStartY=u.scrollTop,s.wheelDX=r,s.wheelDY=i,setTimeout(function(){if(s.wheelStartX==null)return;var e=u.scrollLeft-s.wheelStartX,t=u.scrollTop-s.wheelStartY,n=t&&s.wheelDY&&t/s.wheelDY||e&&s.wheelDX&&e/s.wheelDX;s.wheelStartX=s.wheelStartY=null;if(!n)return;sn=(sn*rn+n)/(rn+1),++rn},200)):(s.wheelDX+=r,s.wheelDY+=i))}function un(e,t,n){if(typeof t=="string"){t=dr[t];if(!t)return!1}e.display.pollingFast&&It(e)&&(e.display.pollingFast=!1);var r=e.doc,i=r.sel.shift,s=!1;try{Ut(e)&&(e.state.suppressEdits=!0),n&&(r.sel.shift=!1),s=t(e)!=os}finally{r.sel.shift=i,e.state.suppressEdits=!1}return s}function an(e){var t=e.state.keyMaps.slice(0);return e.options.extraKeys&&t.push(e.options.extraKeys),t.push(e.options.keyMap),t}function ln(e,t){var n=mr(e.options.keyMap),i=n.auto;clearTimeout(fn),i&&!yr(t)&&(fn=setTimeout(function(){mr(e.options.keyMap)==n&&(e.options.keyMap=i.call?i.call(null,e):i,M(e))},50));var s=br(t,!0),o=!1;if(!s)return!1;var u=an(e);return t.shiftKey?o=gr("Shift-"+s,u,function(t){return un(e,t,!0)})||gr(s,u,function(t){if(typeof t=="string"?/^go[A-Z]/.test(t):t.motion)return un(e,t)}):o=gr(s,u,function(t){return un(e,t)}),o&&(zi(t),nt(e),r&&(t.oldKeyCode=t.keyCode,t.keyCode=0),es(e,"keyHandled",e,s,t)),o}function cn(e,t,n){var r=gr("'"+n+"'",an(e),function(t){return un(e,t,!0)});return r&&(zi(t),nt(e),es(e,"keyHandled",e,"'"+n+"'",t)),r}function pn(e){var n=this;n.state.focused||vn(n);if(ts(n,e)||n.options.onKeyEvent&&n.options.onKeyEvent(n,Ui(e)))return;t&&e.keyCode==27&&(e.returnValue=!1);var r=e.keyCode;n.doc.sel.shift=r==16||e.shiftKey;var i=ln(n,e);!i&&n.state.accessibleTextareaWaiting&&qn(n),f&&(hn=i?r:null,!i&&r==88&&!Bs&&(g?e.metaKey:e.ctrlKey)&&n.replaceSelection(""))}function dn(e){var t=this;if(ts(t,e)||t.options.onKeyEvent&&t.options.onKeyEvent(t,Ui(e)))return;var n=e.keyCode,i=e.charCode;if(f&&n==hn){hn=null,zi(e);return}if((f&&(!e.which||e.which<10)||c)&&ln(t,e))return;var o=String.fromCharCode(i==null?n:i);if(cn(t,e,o))return;s&&!r&&(t.display.inputHasSelection=null),Ft(t)}function vn(e){if(e.options.readOnly=="nocursor")return;e.state.focused||(Gi(e,"focus",e),e.state.focused=!0,e.display.wrapper.className.search(/\bCodeMirror-focused\b/)==-1&&(e.display.wrapper.className+=" CodeMirror-focused"),e.curOp||(qt(e,!0),o&&setTimeout(gs(qt,e,!0),0))),jt(e),nt(e)}function mn(e){e.state.focused&&(Gi(e,"blur",e),e.state.focused=!1,e.display.wrapper.className=e.display.wrapper.className.replace(" CodeMirror-focused","")),clearInterval(e.display.blinker),setTimeout(function(){e.state.focused||(e.doc.sel.shift=!1)},150)}function yn(e,n){function c(){if(i.input.selectionStart!=null){var e=i.input.value="​"+(Mn(s.from,s.to)?"":i.input.value);i.prevInput="​",i.input.selectionStart=1,i.input.selectionEnd=e.length}}function h(){i.inputDiv.style.position="relative",i.input.style.cssText=l,r&&(i.scrollbarV.scrollTop=i.scroller.scrollTop=u),jt(e);if(i.input.selectionStart!=null){(!t||r)&&c(),clearTimeout(gn);var n=0,s=function(){i.prevInput=="​"&&i.input.selectionStart==0?Dt(e,dr.selectAll)(e):n++<10?gn=setTimeout(s,500):qt(e)};gn=setTimeout(s,200)}}if(ts(e,n,"contextmenu"))return;var i=e.display,s=e.doc.sel;if(Wt(i,n)||Qt(e,n))return;var o=Xt(e,n),u=i.scroller.scrollTop;if(!o||f)return;var a=e.options.resetSelectionOnContextMenu;a&&(Mn(s.from,s.to)||_n(o,s.from)||!_n(o,s.to))&&Dt(e,Un)(e.doc,o,o);var l=i.input.style.cssText;i.inputDiv.style.position="absolute",i.input.style.cssText="position: fixed; width: 30px; height: 30px; top: "+(n.clientY-5)+"px; left: "+(n.clientX-5)+"px; z-index: 1000; background: transparent; outline: none;"+"border-width: 0; outline: none; overflow: hidden; opacity: .05; -ms-opacity: .05; filter: alpha(opacity=5);",Rt(e),qt(e,!0),Mn(s.from,s.to)&&(i.input.value=i.prevInput=" "),t&&!r&&c();if(E){Vi(n);var p=function(){Qi(window,"mouseup",p),setTimeout(h,20)};Ki(window,"mouseup",p)}else setTimeout(h,50)}function wn(e,t,n){if(!_n(t.from,n))return Bn(e,n);var r=t.text.length-1-(t.to.line-t.from.line);if(n.line>t.to.line+r){var i=n.line-r,s=e.first+e.size-1;return i>s?On(s,xi(e,s).text.length):jn(n,xi(e,i).text.length)}if(n.line==t.to.line+r)return jn(n,cs(t.text).length+(t.text.length==1?t.from.ch:0)+xi(e,t.to.line).text.length-t.to.ch);var o=n.line-t.from.line;return jn(n,t.text[o].length+(o?0:t.from.ch))}function En(e,t,n){if(n&&typeof n=="object")return{anchor:wn(e,t,n.anchor),head:wn(e,t,n.head)};if(n=="start")return{anchor:t.from,head:t.from};var r=bn(t);if(n=="around")return{anchor:t.from,head:r};if(n=="end")return{anchor:r,head:r};var i=function(e){if(_n(e,t.from))return e;if(!_n(t.to,e))return r;var n=e.line+t.text.length-(t.to.line-t.from.line)-1,i=e.ch;return e.line==t.to.line&&(i+=r.ch-t.to.ch),On(n,i)};return{anchor:i(e.sel.anchor),head:i(e.sel.head)}}function Sn(e,t,n){var r={canceled:!1,from:t.from,to:t.to,text:t.text,origin:t.origin,cancel:function(){this.canceled=!0}};return n&&(r.update=function(t,n,r,i){t&&(this.from=Bn(e,t)),n&&(this.to=Bn(e,n)),r&&(this.text=r),i!==undefined&&(this.origin=i)}),Gi(e,"beforeChange",e,r),e.cm&&Gi(e.cm,"beforeChange",e.cm,r),r.canceled?null:{from:r.from,to:r.to,text:r.text,origin:r.origin}}function xn(e,t,n,r){if(e.cm){if(!e.cm.curOp)return 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o=r.changes.length-1;o>=0;--o){var u=r.changes[o];u.origin=t;if(s&&!Sn(e,u,!1)){(t=="undo"?n.done:n.undone).length=0;return}i.changes.push(Di(e,u));var a=o?En(e,u,null):{anchor:r.anchorBefore,head:r.headBefore};kn(e,u,a,Dr(e,u));var f=[];Ei(e,function(e,t){!t&&ps(f,e.history)==-1&&(qi(e.history,u),f.push(e.history)),kn(e,u,null,Dr(e,u))})}}function Cn(e,t){function n(e){return On(e.line+t,e.ch)}e.first+=t,e.cm&&Bt(e.cm,e.first,e.first,t),e.sel.head=n(e.sel.head),e.sel.anchor=n(e.sel.anchor),e.sel.from=n(e.sel.from),e.sel.to=n(e.sel.to)}function kn(e,t,n,r){if(e.cm&&!e.cm.curOp)return Dt(e.cm,kn)(e,t,n,r);if(t.to.linee.lastLine())return;if(t.from.lines&&(t={from:t.from,to:On(s,xi(e,s).text.length),text:[t.text[0]],origin:t.origin}),t.removed=Ti(e,t.from,t.to),n||(n=En(e,t,null)),e.cm?Ln(e.cm,t,r,n):di(e,t,r,n)}function Ln(e,t,n,r){var i=e.doc,s=e.display,o=t.from,u=t.to,a=!1,f=o.line;e.options.lineWrapping||(f=ki(Ur(i,xi(i,o.line))),i.iter(f,u.line+1,function(e){if(e==s.maxLine)return 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n=e.indentUnit,r=t.multilineTagIndentFactor||1,i=t.multilineTagIndentPastTag||!0,s=t.htmlMode?{autoSelfClosers:{area:!0,base:!0,br:!0,col:!0,command:!0,embed:!0,frame:!0,hr:!0,img:!0,input:!0,keygen:!0,link:!0,meta:!0,param:!0,source:!0,track:!0,wbr:!0},implicitlyClosed:{dd:!0,li:!0,optgroup:!0,option:!0,p:!0,rp:!0,rt:!0,tbody:!0,td:!0,tfoot:!0,th:!0,tr:!0},contextGrabbers:{dd:{dd:!0,dt:!0},dt:{dd:!0,dt:!0},li:{li:!0},option:{option:!0,optgroup:!0},optgroup:{optgroup:!0},p:{address:!0,article:!0,aside:!0,blockquote:!0,dir:!0,div:!0,dl:!0,fieldset:!0,footer:!0,form:!0,h1:!0,h2:!0,h3:!0,h4:!0,h5:!0,h6:!0,header:!0,hgroup:!0,hr:!0,menu:!0,nav:!0,ol:!0,p:!0,pre:!0,section:!0,table:!0,ul:!0},rp:{rp:!0,rt:!0},rt:{rp:!0,rt:!0},tbody:{tbody:!0,tfoot:!0},td:{td:!0,th:!0},tfoot:{tbody:!0},th:{td:!0,th:!0},thead:{tbody:!0,tfoot:!0},tr:{tr:!0}},doNotIndent:{pre:!0},allowUnquoted:!0,allowMissing:!0}:{autoSelfClosers:{},implicitlyClosed:{},contextGrabbers:{},doNotIndent:{},allowUnquoted:!1,allowMissing:!1},o=t.alignCDATA,u,a,f;return{startState:function(){return{tokenize:l,state:y,indented:0,tagName:null,tagStart:null,context:null}},token:function(e,t){!t.tagName&&e.sol()&&(t.indented=e.indentation());if(e.eatSpace())return null;u=a=null;var n=t.tokenize(e,t);return(n||a)&&n!="comment"&&(f=null,t.state=t.state(a||n,e,t),f&&(n=f=="error"?n+" error":f)),n},indent:function(e,t,s){var u=e.context;if(e.tokenize.isInAttribute)return e.stringStartCol+1;if(u&&u.noIndent)return CodeMirror.Pass;if(e.tokenize!=c&&e.tokenize!=l)return s?s.match(/^(\s*)/)[0].length:0;if(e.tagName)return i?e.tagStart+e.tagName.length+2:e.tagStart+n*r;if(o&&/",configuration:t.htmlMode?"html":"xml",helperType:t.htmlMode?"html":"xml"}}),CodeMirror.defineMIME("text/xml","xml"),CodeMirror.defineMIME("application/xml","xml"),CodeMirror.mimeModes.hasOwnProperty("text/html")||CodeMirror.defineMIME("text/html",{name:"xml",htmlMode:!0}),CodeMirror.defineMode("yaml",function(){var e=["true","false","on","off","yes","no"],t=new RegExp("\\b(("+e.join(")|(")+"))$","i");return{token:function(e,n){var r=e.peek(),i=n.escaped;n.escaped=!1;if(r!="#"||e.pos!=0&&!/\s/.test(e.string.charAt(e.pos-1))){if(n.literal&&e.indentation()>n.keyCol)return e.skipToEnd(),"string";n.literal&&(n.literal=!1);if(e.sol()){n.keyCol=0,n.pair=!1,n.pairStart=!1;if(e.match(/---/))return"def";if(e.match(/\.\.\./))return"def";if(e.match(/\s*-\s+/))return"meta"}if(e.match(/^(\{|\}|\[|\])/))return r=="{"?n.inlinePairs++:r=="}"?n.inlinePairs--:r=="["?n.inlineList++:n.inlineList--,"meta";if(n.inlineList>0&&!i&&r==",")return e.next(),"meta";if(n.inlinePairs>0&&!i&&r==",")return n.keyCol=0,n.pair=!1,n.pairStart=!1,e.next(),"meta";if(n.pairStart){if(e.match(/^\s*(\||\>)\s*/))return n.literal=!0,"meta";if(e.match(/^\s*(\&|\*)[a-z0-9\._-]+\b/i))return"variable-2";if(n.inlinePairs==0&&e.match(/^\s*-?[0-9\.\,]+\s?$/))return"number";if(n.inlinePairs>0&&e.match(/^\s*-?[0-9\.\,]+\s?(?=(,|}))/))return"number";if(e.match(t))return"keyword"}return!n.pair&&e.match(/^\s*\S+(?=\s*:($|\s))/i)?(n.pair=!0,n.keyCol=e.indentation(),"atom"):n.pair&&e.match(/^:\s*/)?(n.pairStart=!0,"meta"):(n.pairStart=!1,n.escaped=r=="\\",e.next(),null)}return e.skipToEnd(),"comment"},startState:function(){return{pair:!1,pairStart:!1,keyCol:0,inlinePairs:0,inlineList:0,literal:!1,escaped:!1}}}}),CodeMirror.defineMIME("text/x-yaml","yaml");
\ No newline at end of file
diff --git a/lms/envs/common.py b/lms/envs/common.py
index 7a31bd69df..e3bce08014 100644
--- a/lms/envs/common.py
+++ b/lms/envs/common.py
@@ -825,7 +825,7 @@ PIPELINE_CSS = {
     },
     'style-course-vendor': {
         'source_filenames': [
-            'js/vendor/CodeMirror/codemirror.css',
+            'js/vendor/CodeMirror/codemirror-3.21.0.css',
             'css/vendor/jquery.treeview.css',
             'css/vendor/ui-lightness/jquery-ui-1.8.22.custom.css',
         ],
diff --git a/lms/templates/courseware/courseware.html b/lms/templates/courseware/courseware.html
index 6b0d5c599a..3e9afc5419 100644
--- a/lms/templates/courseware/courseware.html
+++ b/lms/templates/courseware/courseware.html
@@ -40,12 +40,6 @@ ${page_title_breadcrumbs(course_name())}
   ## codemirror
   
 
-  ## alternate codemirror
-  ##  
-  ##  
-  ##  
-
-
   <%static:js group='courseware'/>
   <%static:js group='discussion'/>