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1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 /** | |
6 * @fileoverview | |
7 * Helper class for submenus that should add or remove the parent menu entry | |
8 * depending on whether or not any child items exist. | |
9 */ | |
10 | |
11 'use strict'; | |
12 | |
13 /** @suppress {duplicate} */ | |
14 var remoting = remoting || {}; | |
15 | |
16 /** | |
17 * @param {remoting.ContextMenuAdapter} adapter | |
18 * @param {string} title The title of the parent menu item. | |
19 * @param {boolean} checkable True if the child menus should be checkable. | |
20 * @constructor | |
21 */ | |
22 remoting.SubmenuManager = function(adapter, title, checkable) { | |
23 /** @private {remoting.ContextMenuAdapter} */ | |
24 this.adapter_ = adapter; | |
25 /** @private {string} */ | |
26 this.title_ = title; | |
27 /** @private {boolean} */ | |
28 this.checkable_ = checkable; | |
29 /** @private {!Object} */ | |
30 this.childIds_ = {}; | |
31 /** @private {string} */ | |
32 this.parentId_ = ''; | |
33 }; | |
34 | |
35 /** | |
36 * Add a submenu item, or update the title of an existing submenu item. | |
37 * | |
38 * @param {string} id The child id. | |
39 * @param {string} title The window title. | |
40 * @return {boolean} True if a new menu item was created, false if an existing | |
41 * menu item was renamed. | |
42 */ | |
43 remoting.SubmenuManager.prototype.add = function(id, title) { | |
44 if (id in this.childIds_) { | |
45 this.adapter_.updateTitle(id, title); | |
46 return false; | |
47 } else { | |
48 this.childIds_[id] = true; | |
49 this.addOrRemoveParent_(); | |
50 this.adapter_.create(id, title, this.checkable_, this.parentId_); | |
51 return true; | |
52 } | |
53 }; | |
54 | |
55 /** | |
56 * Remove a submenu item. | |
57 * | |
58 * @param {string} id The child id. | |
59 */ | |
60 remoting.SubmenuManager.prototype.remove = function(id) { | |
61 this.adapter_.remove(id); | |
62 delete this.childIds_[id]; | |
63 this.addOrRemoveParent_(); | |
64 }; | |
65 | |
66 /** | |
67 * Remove all submenu items. | |
68 */ | |
69 remoting.SubmenuManager.prototype.removeAll = function() { | |
70 var submenus = Object.keys(this.childIds_); | |
71 for (var i = 0; i < submenus.length; ++i) { | |
72 this.remove(submenus[i]); | |
73 } | |
74 }; | |
75 | |
76 /** | |
77 * Add the parent menu item if it doesn't exist but there are submenus items, | |
78 * or remove it if it exists but there are no submenus. | |
79 * | |
80 * @private | |
81 */ | |
82 remoting.SubmenuManager.prototype.addOrRemoveParent_ = function() { | |
83 if (Object.getOwnPropertyNames(this.childIds_).length != 0) { | |
84 if (!this.parentId_) { | |
85 this.parentId_ = base.generateXsrfToken(); // Use a random id | |
86 this.adapter_.create(this.parentId_, this.title_, false); | |
87 } | |
88 } else { | |
89 if (this.parentId_) { | |
90 this.adapter_.remove(this.parentId_); | |
91 this.parentId_ = ''; | |
92 } | |
93 } | |
94 }; | |
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