Files
edx-platform/lms/static/js/views/fields.js
2016-01-28 20:07:26 +05:00

598 lines
22 KiB
JavaScript

;(function (define, undefined) {
'use strict';
define([
'gettext', 'jquery', 'underscore', 'backbone',
'text!templates/fields/field_readonly.underscore',
'text!templates/fields/field_dropdown.underscore',
'text!templates/fields/field_link.underscore',
'text!templates/fields/field_text.underscore',
'text!templates/fields/field_textarea.underscore',
'backbone-super'
], function (gettext, $, _, Backbone,
field_readonly_template,
field_dropdown_template,
field_link_template,
field_text_template,
field_textarea_template
) {
var messageRevertDelay = 6000;
var FieldViews = {};
FieldViews.FieldView = Backbone.View.extend({
fieldType: 'generic',
className: function () {
return 'u-field' + ' u-field-' + this.fieldType + ' u-field-' + this.options.valueAttribute;
},
tagName: 'div',
indicators: {
'canEdit': '<i class="icon fa fa-pencil message-can-edit" aria-hidden="true"></i><span class="sr">' + gettext("Editable") + '</span>',
'error': '<i class="fa fa-exclamation-triangle message-error" aria-hidden="true"></i><span class="sr">' + gettext("Error") + '</span>',
'validationError': '<i class="fa fa-exclamation-triangle message-validation-error" aria-hidden="true"></i><span class="sr">' + gettext("Validation Error") + '</span>',
'inProgress': '<i class="fa fa-spinner fa-pulse message-in-progress" aria-hidden="true"></i><span class="sr">' + gettext("In Progress") + '</span>',
'success': '<i class="fa fa-check message-success" aria-hidden="true"></i><span class="sr">' + gettext("Success") + '</span>',
'plus': '<i class="fa fa-plus placeholder" aria-hidden="true"></i><span class="sr">' + gettext("Placeholder")+ '</span>'
},
messages: {
'canEdit': '',
'error': gettext('An error occurred. Please try again.'),
'validationError': '',
'inProgress': gettext('Saving'),
'success': gettext('Your changes have been saved.')
},
initialize: function () {
this.template = _.template(this.fieldTemplate || '');
this.helpMessage = this.options.helpMessage || '';
this.showMessages = _.isUndefined(this.options.showMessages) ? true : this.options.showMessages;
_.bindAll(this, 'modelValue', 'modelValueIsSet', 'showNotificationMessage','getNotificationMessage',
'getMessage', 'title', 'showHelpMessage', 'showInProgressMessage', 'showSuccessMessage',
'showErrorMessage'
);
},
modelValue: function () {
return this.model.get(this.options.valueAttribute);
},
modelValueIsSet: function() {
return (this.modelValue() === true);
},
title: function (text) {
return this.$('.u-field-title').html(text);
},
getMessage: function(message_status) {
if ((message_status + 'Message') in this) {
return this[message_status + 'Message'].call(this);
} else if (this.showMessages) {
return this.indicators[message_status] + this.messages[message_status];
}
return this.indicators[message_status];
},
showHelpMessage: function (message) {
if (_.isUndefined(message) || _.isNull(message)) {
message = this.helpMessage;
}
this.$('.u-field-message-notification').html('');
this.$('.u-field-message-help').html(message);
},
getNotificationMessage: function() {
return this.$('.u-field-message-notification').html();
},
showNotificationMessage: function(message) {
this.$('.u-field-message-help').html('');
this.$('.u-field-message-notification').html(message);
},
showCanEditMessage: function(show) {
if (!_.isUndefined(show) && show) {
this.showNotificationMessage(this.getMessage('canEdit'));
} else {
this.showNotificationMessage('');
}
},
showInProgressMessage: function () {
this.showNotificationMessage(this.getMessage('inProgress'));
},
showSuccessMessage: function () {
var successMessage = this.getMessage('success');
this.showNotificationMessage(successMessage);
if (this.options.refreshPageOnSave) {
location.reload(true);
}
var view = this;
var context = Date.now();
this.lastSuccessMessageContext = context;
setTimeout(function () {
if ((context === view.lastSuccessMessageContext) && (view.getNotificationMessage() === successMessage)) {
if (view.editable === 'toggle') {
view.showCanEditMessage(true);
} else {
view.showHelpMessage();
}
}
}, messageRevertDelay);
},
showErrorMessage: function (xhr) {
if (xhr.status === 400) {
try {
var errors = JSON.parse(xhr.responseText),
validationErrorMessage = _.escape(
errors.field_errors[this.options.valueAttribute].user_message
),
message = this.indicators.validationError + validationErrorMessage;
this.showNotificationMessage(message);
} catch (error) {
this.showNotificationMessage(this.getMessage('error'));
}
} else {
this.showNotificationMessage(this.getMessage('error'));
}
}
});
FieldViews.EditableFieldView = FieldViews.FieldView.extend({
initialize: function (options) {
this.persistChanges = _.isUndefined(options.persistChanges) ? false : options.persistChanges;
_.bindAll(this, 'saveAttributes', 'saveSucceeded', 'showDisplayMode', 'showEditMode',
'startEditing', 'finishEditing'
);
this._super(options);
this.editable = _.isUndefined(this.options.editable) ? 'always': this.options.editable;
this.$el.addClass('editable-' + this.editable);
if (this.editable === 'always') {
this.showEditMode(false);
} else {
this.showDisplayMode(false);
}
},
saveAttributes: function (attributes, options) {
if (this.persistChanges === true) {
var view = this;
var defaultOptions = {
contentType: 'application/merge-patch+json',
patch: true,
wait: true,
success: function () {
view.saveSucceeded();
},
error: function (model, xhr) {
view.showErrorMessage(xhr);
}
};
this.showInProgressMessage();
this.model.save(attributes, _.extend(defaultOptions, options));
}
},
saveSucceeded: function () {
this.showSuccessMessage();
},
updateDisplayModeClass: function() {
this.$el.removeClass('mode-edit');
this.$el.toggleClass('mode-hidden', (this.editable === 'never' && !this.modelValueIsSet()));
this.$el.toggleClass('mode-placeholder', (this.editable === 'toggle' && !this.modelValueIsSet()));
this.$el.toggleClass('mode-display', (this.modelValueIsSet()));
},
showDisplayMode: function(render) {
this.mode = 'display';
if (render) { this.render(); }
this.updateDisplayModeClass();
},
showEditMode: function(render) {
this.mode = 'edit';
if (render) { this.render(); }
this.$el.removeClass('mode-hidden');
this.$el.removeClass('mode-placeholder');
this.$el.removeClass('mode-display');
this.$el.addClass('mode-edit');
},
startEditing: function () {
if (this.editable === 'toggle' && this.mode !== 'edit') {
this.showEditMode(true);
}
},
finishEditing: function() {
if (this.persistChanges === false || this.mode !== 'edit') {return;}
if (this.fieldValue() !== this.modelValue()) {
this.saveValue();
} else {
if (this.editable === 'always') {
this.showEditMode(true);
} else {
this.showDisplayMode(true);
}
}
},
highlightFieldOnError: function () {
this.$el.addClass('error');
},
unhighlightField: function () {
this.$el.removeClass('error');
}
});
FieldViews.ReadonlyFieldView = FieldViews.FieldView.extend({
fieldType: 'readonly',
fieldTemplate: field_readonly_template,
initialize: function (options) {
this._super(options);
_.bindAll(this, 'render', 'fieldValue', 'updateValueInField');
this.listenTo(this.model, "change:" + this.options.valueAttribute, this.updateValueInField);
},
render: function () {
this.$el.html(this.template({
id: this.options.valueAttribute,
title: this.options.title,
screenReaderTitle: this.options.screenReaderTitle || this.options.title,
value: this.modelValue(),
message: this.helpMessage
}));
this.delegateEvents();
return this;
},
fieldValue: function () {
return this.$('.u-field-value').text();
},
updateValueInField: function () {
this.$('.u-field-value ').html(_.escape(this.modelValue()));
}
});
FieldViews.TextFieldView = FieldViews.EditableFieldView.extend({
fieldType: 'text',
fieldTemplate: field_text_template,
events: {
'change input': 'saveValue'
},
initialize: function (options) {
this._super(options);
_.bindAll(this, 'render', 'fieldValue', 'updateValueInField', 'saveValue');
this.listenTo(this.model, "change:" + this.options.valueAttribute, this.updateValueInField);
},
render: function () {
this.$el.html(this.template({
id: this.options.valueAttribute,
title: this.options.title,
value: this.modelValue(),
message: this.helpMessage
}));
this.delegateEvents();
return this;
},
fieldValue: function () {
return this.$('.u-field-value input').val();
},
updateValueInField: function () {
var value = (_.isUndefined(this.modelValue()) || _.isNull(this.modelValue())) ? '' : this.modelValue();
this.$('.u-field-value input').val(_.escape(value));
},
saveValue: function () {
var attributes = {};
attributes[this.options.valueAttribute] = this.fieldValue();
this.saveAttributes(attributes);
}
});
FieldViews.DropdownFieldView = FieldViews.EditableFieldView.extend({
fieldType: 'dropdown',
fieldTemplate: field_dropdown_template,
events: {
'click': 'startEditing',
'change select': 'finishEditing',
'focusout select': 'finishEditing'
},
initialize: function (options) {
_.bindAll(this, 'render', 'optionForValue', 'fieldValue', 'displayValue', 'updateValueInField', 'saveValue');
this._super(options);
this.listenTo(this.model, "change:" + this.options.valueAttribute, this.updateValueInField);
},
render: function () {
this.$el.html(this.template({
id: this.options.valueAttribute,
mode: this.mode,
editable: this.editable,
title: this.options.title,
screenReaderTitle: this.options.screenReaderTitle || this.options.title,
titleVisible: this.options.titleVisible !== undefined ? this.options.titleVisible : true,
iconName: this.options.iconName,
showBlankOption: (!this.options.required || !this.modelValueIsSet()),
selectOptions: this.options.options,
message: this.helpMessage
}));
this.delegateEvents();
this.updateValueInField();
if (this.editable === 'toggle') {
this.showCanEditMessage(this.mode === 'display');
}
return this;
},
modelValueIsSet: function() {
var value = this.modelValue();
if (_.isUndefined(value) || _.isNull(value) || value === '') {
return false;
} else {
return !(_.isUndefined(this.optionForValue(value)));
}
},
optionForValue: function(value) {
return _.find(this.options.options, function(option) { return option[0] === value; });
},
fieldValue: function () {
var value;
if (this.editable === 'never') {
value = this.modelValueIsSet() ? this.modelValue () : null;
}
else {
value = this.$('.u-field-value select').val();
}
return value === '' ? null : value;
},
displayValue: function (value) {
if (value) {
var option = this.optionForValue(value);
return (option ? option[1] : '');
} else {
return '';
}
},
updateValueInField: function () {
if (this.editable !== 'never') {
this.$('.u-field-value select').val(this.modelValue() || '');
}
var value = this.displayValue(this.modelValue() || '');
if (this.modelValueIsSet() === false) {
value = this.options.placeholderValue || '';
}
this.$('.u-field-value').attr('aria-label', this.options.title);
this.$('.u-field-value-readonly').html(_.escape(value));
if (this.mode === 'display') {
this.updateDisplayModeClass();
}
},
saveValue: function () {
var attributes = {};
attributes[this.options.valueAttribute] = this.fieldValue();
this.saveAttributes(attributes);
},
showDisplayMode: function(render) {
this._super(render);
if (this.editable === 'toggle') {
this.$('.u-field-value a').focus();
}
},
showEditMode: function(render) {
this._super(render);
if (this.editable === 'toggle') {
this.$('.u-field-value select').focus();
}
},
saveSucceeded: function() {
if (this.editable === 'toggle') {
this.showDisplayMode();
}
if (this.options.required && this.modelValueIsSet()) {
this.$('option[value=""]').remove();
}
this._super();
},
disableField: function(disable) {
if (this.editable !== 'never') {
this.$('.u-field-value select').prop('disabled', disable);
}
}
});
FieldViews.TextareaFieldView = FieldViews.EditableFieldView.extend({
fieldType: 'textarea',
fieldTemplate: field_textarea_template,
events: {
'click .wrapper-u-field': 'startEditing',
'click .u-field-placeholder': 'startEditing',
'focusout textarea': 'finishEditing',
'change textarea': 'adjustTextareaHeight',
'keyup textarea': 'adjustTextareaHeight',
'keydown textarea': 'onKeyDown',
'paste textarea': 'adjustTextareaHeight',
'cut textarea': 'adjustTextareaHeight'
},
initialize: function (options) {
_.bindAll(this, 'render', 'onKeyDown', 'adjustTextareaHeight', 'fieldValue', 'saveValue', 'updateView');
this._super(options);
this.listenTo(this.model, "change:" + this.options.valueAttribute, this.updateView);
},
render: function () {
var value = this.modelValue();
if (this.mode === 'display') {
value = value || this.options.placeholderValue;
}
this.$el.html(this.template({
id: this.options.valueAttribute,
screenReaderTitle: this.options.screenReaderTitle || this.options.title,
mode: this.mode,
editable: this.editable,
value: value,
message: this.helpMessage,
messagePosition: this.options.messagePosition || 'footer',
placeholderValue: this.options.placeholderValue
}));
this.delegateEvents();
this.title((this.modelValue() || this.mode === 'edit') ? this.options.title : this.indicators['plus'] + this.options.title);
if (this.editable === 'toggle') {
this.showCanEditMessage(this.mode === 'display');
}
return this;
},
onKeyDown: function (event) {
if (event.keyCode === 13) {
event.preventDefault();
this.finishEditing(event);
} else {
this.adjustTextareaHeight();
}
},
adjustTextareaHeight: function() {
if (this.persistChanges === false) {return;}
var textarea = this.$('textarea');
textarea.css('height', 'auto').css('height', textarea.prop('scrollHeight') + 10);
},
modelValue: function() {
var value = this._super();
return value ? $.trim(value) : '';
},
fieldValue: function () {
if (this.mode === 'edit') {
return this.$('.u-field-value textarea').val();
}
else {
return this.$('.u-field-value .u-field-value-readonly').text();
}
},
saveValue: function () {
var attributes = {};
attributes[this.options.valueAttribute] = this.fieldValue();
this.saveAttributes(attributes);
},
updateView: function () {
if (this.mode !== 'edit') {
this.showDisplayMode(true);
}
},
modelValueIsSet: function() {
return !(this.modelValue() === '');
},
showEditMode: function(render) {
this._super(render);
this.adjustTextareaHeight();
this.$('.u-field-value textarea').focus();
},
saveSucceeded: function() {
this._super();
if (this.editable === 'toggle') {
this.showDisplayMode(true);
this.$('a').focus();
}
}
});
FieldViews.LinkFieldView = FieldViews.FieldView.extend({
fieldType: 'link',
fieldTemplate: field_link_template,
events: {
'click a': 'linkClicked'
},
initialize: function (options) {
this._super(options);
_.bindAll(this, 'render', 'linkClicked');
},
render: function () {
this.$el.html(this.template({
id: this.options.valueAttribute,
title: this.options.title,
screenReaderTitle: this.options.screenReaderTitle || this.options.title,
linkTitle: this.options.linkTitle,
linkHref: this.options.linkHref,
message: this.helpMessage
}));
this.delegateEvents();
return this;
},
linkClicked: function (event) {
event.preventDefault();
}
});
return FieldViews;
});
}).call(this, define || RequireJS.define);