make mathjax working with the editor

common/static/js/vendor/Markdown.Editor.js

@@ -54,7 +54,7 @@
         idPostfix = idPostfix || "";
 
         var hooks = this.hooks = new Markdown.HookCollection();
-        hooks.addNoop("onPreviewRefresh");       // called with no arguments after the preview has been refreshed
+        hooks.addNoop("onPreviewPush");       // called with no arguments after the preview has been refreshed
         hooks.addNoop("postBlockquoteCreation"); // called with the user's selection *after* the blockquote was created; should return the actual to-be-inserted text
         hooks.addFalse("insertImageDialog");     /* called with one parameter: a callback to be called with the URL of the image. If the application creates
                                                   * its own image insertion dialog, this hook should return true, and the callback should be called with the chosen
@@ -72,7 +72,7 @@
 
             panels = new PanelCollection(idPostfix);
             var commandManager = new CommandManager(hooks);
-            var previewManager = new PreviewManager(markdownConverter, panels, function () { hooks.onPreviewRefresh(); });
+            var previewManager = new PreviewManager(markdownConverter, panels, function (text, previewSet) { hooks.onPreviewPush(text, previewSet); });
             var undoManager, uiManager;
 
             if (!/\?noundo/.test(doc.location.href)) {
@@ -769,7 +769,7 @@
         this.init();
     };
 
-    function PreviewManager(converter, panels, previewRefreshCallback) {
+    function PreviewManager(converter, panels, previewPushCallback) {
 
         var managerObj = this;
         var timeout;
@@ -928,8 +928,7 @@
             var emptyTop = position.getTop(panels.input) - getDocScrollTop();
 
             if (panels.preview) {
-                previewSet(text);
-                previewRefreshCallback();
+                previewPushCallback(text, previewSet);
             }
 
             setPanelScrollTops();
@@ -2157,4 +2156,4 @@
     }
 
 
-})();
+})();

common/static/js/vendor/split.js

@@ -0,0 +1,118 @@
+/*!
+ * Cross-Browser Split 1.1.1
+ * Copyright 2007-2012 Steven Levithan <stevenlevithan.com>
+ * Available under the MIT License
+ * ECMAScript compliant, uniform cross-browser split method
+ */
+
+/**
+ * Splits a string into an array of strings using a regex or string separator. Matches of the
+ * separator are not included in the result array. However, if `separator` is a regex that contains
+ * capturing groups, backreferences are spliced into the result each time `separator` is matched.
+ * Fixes browser bugs compared to the native `String.prototype.split` and can be used reliably
+ * cross-browser.
+ * @param {String} str String to split.
+ * @param {RegExp|String} separator Regex or string to use for separating the string.
+ * @param {Number} [limit] Maximum number of items to include in the result array.
+ * @returns {Array} Array of substrings.
+ * @example
+ *
+ * // Basic use
+ * split('a b c d', ' ');
+ * // -> ['a', 'b', 'c', 'd']
+ *
+ * // With limit
+ * split('a b c d', ' ', 2);
+ * // -> ['a', 'b']
+ *
+ * // Backreferences in result array
+ * split('..word1 word2..', /([a-z]+)(\d+)/i);
+ * // -> ['..', 'word', '1', ' ', 'word', '2', '..']
+ */
+
+var _split; // instead of split for a less common name; avoid conflict
+
+// Avoid running twice; that would break the `nativeSplit` reference
+_split = _split || function (undef) {
+
+    var nativeSplit = String.prototype.split,
+        compliantExecNpcg = /()??/.exec("")[1] === undef, // NPCG: nonparticipating capturing group
+        self;
+
+    self = function (str, separator, limit) {
+        // If `separator` is not a regex, use `nativeSplit`
+        if (Object.prototype.toString.call(separator) !== "[object RegExp]") {
+            return nativeSplit.call(str, separator, limit);
+        }
+        var output = [],
+            flags = (separator.ignoreCase ? "i" : "") +
+                    (separator.multiline  ? "m" : "") +
+                    (separator.extended   ? "x" : "") + // Proposed for ES6
+                    (separator.sticky     ? "y" : ""), // Firefox 3+
+            lastLastIndex = 0,
+            // Make `global` and avoid `lastIndex` issues by working with a copy
+            separator = new RegExp(separator.source, flags + "g"),
+            separator2, match, lastIndex, lastLength;
+        str += ""; // Type-convert
+        if (!compliantExecNpcg) {
+            // Doesn't need flags gy, but they don't hurt
+            separator2 = new RegExp("^" + separator.source + "$(?!\\s)", flags);
+        }
+        /* Values for `limit`, per the spec:
+         * If undefined: 4294967295 // Math.pow(2, 32) - 1
+         * If 0, Infinity, or NaN: 0
+         * If positive number: limit = Math.floor(limit); if (limit > 4294967295) limit -= 4294967296;
+         * If negative number: 4294967296 - Math.floor(Math.abs(limit))
+         * If other: Type-convert, then use the above rules
+         */
+        limit = limit === undef ?
+            -1 >>> 0 : // Math.pow(2, 32) - 1
+            limit >>> 0; // ToUint32(limit)
+        while (match = separator.exec(str)) {
+            // `separator.lastIndex` is not reliable cross-browser
+            lastIndex = match.index + match[0].length;
+            if (lastIndex > lastLastIndex) {
+                output.push(str.slice(lastLastIndex, match.index));
+                // Fix browsers whose `exec` methods don't consistently return `undefined` for
+                // nonparticipating capturing groups
+                if (!compliantExecNpcg && match.length > 1) {
+                    match[0].replace(separator2, function () {
+                        for (var i = 1; i < arguments.length - 2; i++) {
+                            if (arguments[i] === undef) {
+                                match[i] = undef;
+                            }
+                        }
+                    });
+                }
+                if (match.length > 1 && match.index < str.length) {
+                    Array.prototype.push.apply(output, match.slice(1));
+                }
+                lastLength = match[0].length;
+                lastLastIndex = lastIndex;
+                if (output.length >= limit) {
+                    break;
+                }
+            }
+            if (separator.lastIndex === match.index) {
+                separator.lastIndex++; // Avoid an infinite loop
+            }
+        }
+        if (lastLastIndex === str.length) {
+            if (lastLength || !separator.test("")) {
+                output.push("");
+            }
+        } else {
+            output.push(str.slice(lastLastIndex));
+        }
+        return output.length > limit ? output.slice(0, limit) : output;
+    };
+
+    // For convenience
+    String.prototype.split = function (separator, limit) {
+        return self(this, separator, limit);
+    };
+
+    return self;
+
+}();
+