| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| /** |
| * @fileoverview |
| * Class representing a menu button and its associated menu items. |
| */ |
| |
| 'use strict'; |
| |
| /** @suppress {duplicate} */ |
| var remoting = remoting || {}; |
| |
| /** |
| * @constructor |
| * @param {Element} container The element containing the <button> and <ul> |
| * elements comprising the menu. It should have the "menu-button" class. |
| * @param {function():void=} opt_onShow Optional callback invoked before the |
| * menu is shown. |
| */ |
| remoting.MenuButton = function(container, opt_onShow) { |
| /** |
| * @type {HTMLElement} |
| * @private |
| */ |
| this.button_ = /** @type {HTMLElement} */ |
| (container.querySelector('button,.menu-button-activator')); |
| |
| /** |
| * @type {undefined|function():void} |
| * @private |
| */ |
| this.onShow_ = opt_onShow; |
| |
| /** @type {remoting.MenuButton} */ |
| var that = this; |
| |
| // Create event handlers to show and hide the menu, attached to the button |
| // and the document <html> tag, respectively. These handlers are added and |
| // removed depending on the state of the menu. To prevent both triggering |
| // for one click, they are added by a timer. |
| /** |
| * @type {function(Event):void} |
| * @private |
| */ |
| this.onClick_ = function(event) { |
| if (that.onShow_) { |
| that.onShow_(); |
| } |
| that.button_.classList.add(remoting.MenuButton.BUTTON_ACTIVE_CLASS_); |
| that.button_.removeEventListener('click', that.onClick_, false); |
| window.setTimeout( |
| function() { |
| // Attach the click handler to the <html> node so that it includes |
| // the document area outside the plugin, which is not covered by |
| // the <body> node. |
| var htmlNode = document.body.parentNode; |
| htmlNode.addEventListener('click', that.closeHandler_, true); |
| }, |
| 100); |
| }; |
| |
| /** |
| * @type {function(Event):void} |
| * @private |
| */ |
| this.closeHandler_ = function(event) { |
| that.button_.classList.remove(remoting.MenuButton.BUTTON_ACTIVE_CLASS_); |
| document.body.removeEventListener('click', that.closeHandler_, true); |
| window.setTimeout( |
| function() { |
| that.button_.addEventListener('click', that.onClick_, false); |
| }, |
| 100); |
| }; |
| |
| this.button_.addEventListener('click', this.onClick_, false); |
| }; |
| |
| /** |
| * Set or unset the selected state of an <li> menu item. |
| * @param {HTMLElement} item The menu item to update. |
| * @param {boolean} selected True to select the item, false to deselect it. |
| * @return {void} Nothing. |
| */ |
| remoting.MenuButton.select = function(item, selected) { |
| if (selected) { |
| item.classList.add('selected'); |
| } else { |
| item.classList.remove('selected'); |
| } |
| }; |
| |
| /** @const @private */ |
| remoting.MenuButton.BUTTON_ACTIVE_CLASS_ = 'active'; |
