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diff --git a/contexts/data/lib/closure-library/closure/goog/ui/equation/equationeditor.js b/contexts/data/lib/closure-library/closure/goog/ui/equation/equationeditor.js
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--- a/contexts/data/lib/closure-library/closure/goog/ui/equation/equationeditor.js
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@@ -1,223 +0,0 @@
-// Copyright 2008 The Closure Library Authors. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS-IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-goog.provide('goog.ui.equation.EquationEditor');
-
-goog.require('goog.dom');
-goog.require('goog.events');
-goog.require('goog.ui.Component');
-goog.require('goog.ui.Tab');
-goog.require('goog.ui.TabBar');
-goog.require('goog.ui.equation.EditorPane');
-goog.require('goog.ui.equation.ImageRenderer');
-goog.require('goog.ui.equation.TexPane');
-
-
-
-/**
- * User interface for equation editor plugin.
- * @constructor
- * @param {Object} context The context that this equation editor runs in.
- * @param {goog.dom.DomHelper=} opt_domHelper DomHelper to use.
- * @param {string=} opt_helpUrl Help document URL to use in the "Learn more"
- * link.
- * @extends {goog.ui.Component}
- */
-goog.ui.equation.EquationEditor = function(context, opt_domHelper,
- opt_helpUrl) {
- goog.base(this, opt_domHelper);
-
- /**
- * The context this editor runs in.
- * @type {Object}
- * @private
- */
- this.context_ = context;
-
- /**
- * Help document URL to use in the "Learn more" link.
- * @type {string}
- * @private
- */
- this.helpUrl_ = opt_helpUrl || '';
-};
-goog.inherits(goog.ui.equation.EquationEditor, goog.ui.Component);
-
-
-/**
- * Constants for event names.
- * @enum {string}
- */
-goog.ui.equation.EquationEditor.EventType = {
- /**
- * Dispatched when equation changes.
- */
- CHANGE: 'change'
-};
-
-
-/**
- * The index of the last active tab. Zero means first tab.
- * @type {number}
- * @private
- */
-goog.ui.equation.EquationEditor.prototype.activeTabIndex_ = 0;
-
-
-/** @override */
-goog.ui.equation.EquationEditor.prototype.createDom = function() {
- goog.base(this, 'createDom');
- this.createDom_();
-};
-
-
-/**
- * Creates main editor contents.
- * @private
- */
-goog.ui.equation.EquationEditor.prototype.createDom_ = function() {
- var contentElement = this.getElement();
-
- /** @desc Title of the visual equation editor tab. */
- var MSG_VISUAL_EDITOR = goog.getMsg('Editor');
-
- /** @desc Title of the TeX equation editor tab. */
- var MSG_TEX_EDITOR = goog.getMsg('TeX');
-
- // Create the main tabs
- var dom = this.dom_;
- var tabTop = dom.createDom('div',
- {'class': 'goog-tab-bar goog-tab-bar-top'},
- dom.createDom('div',
- {'class': 'goog-tab goog-tab-selected'}, MSG_VISUAL_EDITOR),
- dom.createDom('div', {'class': 'goog-tab'}, MSG_TEX_EDITOR));
- var tabClear = dom.createDom('div', {'class': 'goog-tab-bar-clear'});
- var tabContent = dom.createDom('div', {'class': 'ee-content'});
- dom.appendChild(contentElement, tabTop);
- dom.appendChild(contentElement, tabClear);
- dom.appendChild(contentElement, tabContent);
-
- var tabBar = new goog.ui.TabBar();
- tabBar.decorate(tabTop);
-
- /**
- * The tab bar.
- * @type {!goog.ui.TabBar}
- * @private
- */
- this.tabBar_ = tabBar;
-
- goog.events.listen(tabBar, goog.ui.Component.EventType.SELECT,
- goog.bind(this.handleTabSelect_, this));
-
- var texEditor = new goog.ui.equation.TexPane(this.context_,
- this.helpUrl_, this.dom_);
- this.addChild(texEditor);
- texEditor.render(tabContent);
-
- this.setVisibleTab_(0); // Make first tab visible
-};
-
-
-/**
- * Sets the visibility of the editor.
- * @param {boolean} visible Whether the editor should be visible.
- */
-goog.ui.equation.EquationEditor.prototype.setVisible = function(visible) {
- // Show active tab if visible, or none if not
- this.setVisibleTab_(visible ? this.activeTabIndex_ : -1);
-};
-
-
-/**
- * Sets the tab at the selected index as visible and all the rest as not
- * visible.
- * @param {number} tabIndex The tab index that is visible. -1 means no
- * tab is visible.
- * @private
- */
-goog.ui.equation.EquationEditor.prototype.setVisibleTab_ = function(tabIndex) {
- for (var i = 0; i < this.getChildCount(); i++) {
- this.getChildAt(i).setVisible(i == tabIndex);
- }
-};
-
-
-/** @override */
-goog.ui.equation.EquationEditor.prototype.decorateInternal = function(element) {
- this.setElementInternal(element);
- this.createDom_();
-};
-
-
-/**
- * Returns the encoded equation.
- * @return {string} The encoded equation.
- */
-goog.ui.equation.EquationEditor.prototype.getEquation = function() {
- var sel = this.tabBar_.getSelectedTabIndex();
- return this.getChildAt(sel).getEquation();
-};
-
-
-/**
- * @return {string} The html code to embed in the document.
- */
-goog.ui.equation.EquationEditor.prototype.getHtml = function() {
- return goog.ui.equation.ImageRenderer.getHtml(this.getEquation());
-};
-
-
-/**
- * Checks whether the current equation is valid and can be used in a document.
- * @return {boolean} Whether the equation is valid.
- */
-goog.ui.equation.EquationEditor.prototype.isValid = function() {
- return goog.ui.equation.ImageRenderer.isEquationTooLong(
- this.getEquation());
-};
-
-
-/**
- * Handles a tab selection by the user.
- * @param {goog.events.Event} e The event.
- * @private
- */
-goog.ui.equation.EquationEditor.prototype.handleTabSelect_ = function(e) {
- var sel = this.tabBar_.getSelectedTabIndex();
- if (sel != this.activeTabIndex_) {
- this.activeTabIndex_ = sel;
- this.setVisibleTab_(sel);
- }
-
- // TODO(user) Pass equation from the tab to the other is modified
-};
-
-
-/**
- * Parse an equation and draw it.
- * Clears any previous displayed equation.
- * @param {string} equation The equation text to parse.
- */
-goog.ui.equation.EquationEditor.prototype.setEquation = function(equation) {
- var sel = this.tabBar_.getSelectedTabIndex();
- this.getChildAt(sel).setEquation(equation);
-};
-
-
-/** @override */
-goog.ui.equation.EquationEditor.prototype.disposeInternal = function() {
- this.context_ = null;
- goog.base(this, 'disposeInternal');
-};