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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* @module moodle-editor_atto-editor
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* @submodule textarea
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*/
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/**
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* Textarea functions for the Atto editor.
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*
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* See {{#crossLink "M.editor_atto.Editor"}}{{/crossLink}} for details.
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*
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* @namespace M.editor_atto
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* @class EditorTextArea
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*/
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function EditorTextArea() {}
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EditorTextArea.ATTRS = {
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};
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EditorTextArea.prototype = {
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/**
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* Return the appropriate empty content value for the current browser.
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*
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* Different browsers use a different content when they are empty and
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* we must set this reliable across the board.
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*
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* @method _getEmptyContent
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* @return String The content to use representing no user-provided content
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* @private
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*/
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_getEmptyContent: function() {
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if (!this.enableAppropriateEmptyContent) {
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// Return the empty string if we do not enable the empty placeholder. Ex: HTML mode.
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return '';
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}
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var alignment;
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if (this.coreDirection === 'rtl') {
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alignment = 'style="text-align: right;"';
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} else {
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alignment = 'style="text-align: left;"';
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}
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if (Y.UA.ie && Y.UA.ie < 10) {
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return '<p dir="' + this.coreDirection + '" ' + alignment + '></p>';
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} else {
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return '<p dir="' + this.coreDirection + '" ' + alignment + '><br></p>';
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}
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},
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/**
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* Copy and clean the text from the textarea into the contenteditable div.
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*
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* If the text is empty, provide a default paragraph tag to hold the content.
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*
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* @method updateFromTextArea
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* @chainable
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*/
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updateFromTextArea: function() {
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// Clear it first.
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this.editor.setHTML('');
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// Copy cleaned HTML to editable div.
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this.editor.append(this._cleanHTML(this.textarea.get('value'), true));
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// Insert a paragraph in the empty contenteditable div.
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if (this.editor.getHTML() === '') {
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this.editor.setHTML(this._getEmptyContent());
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}
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return this;
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},
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/**
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* Copy the text from the contenteditable to the textarea which it replaced.
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*
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* @method updateOriginal
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* @chainable
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*/
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updateOriginal: function() {
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// Get the previous and current value to compare them.
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var oldValue = this.textarea.get('value'),
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newValue = this.getCleanHTML();
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if (newValue === "" && this.isActive()) {
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// The content was entirely empty so get the empty content placeholder.
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newValue = this._getEmptyContent();
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}
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// Only call this when there has been an actual change to reduce processing.
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if (oldValue !== newValue) {
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// Insert the cleaned content.
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this.textarea.set('value', newValue);
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// Trigger the onchange callback on the textarea, essentially to notify the formchangechecker module.
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this.textarea.simulate('change');
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// Trigger handlers for this action.
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this.fire('change');
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}
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return this;
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}
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};
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Y.Base.mix(Y.M.editor_atto.Editor, [EditorTextArea]);
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