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Diffstat (limited to 'tools/addon-sdk-1.3/packages/api-utils/lib/windows/tabs.js')
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diff --git a/tools/addon-sdk-1.3/packages/api-utils/lib/windows/tabs.js b/tools/addon-sdk-1.3/packages/api-utils/lib/windows/tabs.js new file mode 100644 index 0000000..551b1ce --- /dev/null +++ b/tools/addon-sdk-1.3/packages/api-utils/lib/windows/tabs.js @@ -0,0 +1,207 @@ +/* ***** BEGIN LICENSE BLOCK ***** + * Version: MPL 1.1/GPL 2.0/LGPL 2.1 + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (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.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + * + * The Original Code is Jetpack. + * + * The Initial Developer of the Original Code is + * the Mozilla Foundation. + * Portions created by the Initial Developer are Copyright (C) 2010 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * Irakli Gozalishvili <gozala@mozilla.com> (Original Author) + * + * Alternatively, the contents of this file may be used under the terms of + * either the GNU General Public License Version 2 or later (the "GPL"), or + * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), + * in which case the provisions of the GPL or the LGPL are applicable instead + * of those above. If you wish to allow use of your version of this file only + * under the terms of either the GPL or the LGPL, and not to allow others to + * use your version of this file under the terms of the MPL, indicate your + * decision by deleting the provisions above and replace them with the notice + * and other provisions required by the GPL or the LGPL. If you do not delete + * the provisions above, a recipient may use your version of this file under + * the terms of any one of the MPL, the GPL or the LGPL. + * + * ***** END LICENSE BLOCK ***** */ +"use strict"; + +const { Trait } = require("../traits"); +const { List } = require("../list"); +const { Tab, Options } = require("../tabs/tab"); +const { EventEmitter } = require("../events"); +const { EVENTS } = require("../tabs/events"); +const { getOwnerWindow, getActiveTab, getTabs, + openTab, activateTab } = require("../tabs/utils"); +const { observer: tabsObserver } = require("../tabs/observer"); + +const TAB_BROWSER = "tabbrowser"; + +/** + * This is a trait that is used in composition of window wrapper. Trait tracks + * tab related events of the wrapped window in order to keep track of open + * tabs and maintain their wrappers. Every new tab gets wrapped and jetpack + * type event is emitted. + */ +const WindowTabTracker = Trait.compose({ + /** + * Chrome window whose tabs are tracked. + */ + _window: Trait.required, + /** + * Function used to emit events. + */ + _emit: EventEmitter.required, + _tabOptions: Trait.required, + /** + * Function to add event listeners. + */ + on: EventEmitter.required, + removeListener: EventEmitter.required, + /** + * Initializes tab tracker for a browser window. + */ + _initWindowTabTracker: function _initWindowTabTracker() { + // Ugly hack that we have to remove at some point (see Bug 658059). At this + // point it is necessary to invoke lazy `tabs` getter on the windows object + // which creates a `TabList` instance. + this.tabs; + // Binding all methods used as event listeners to the instance. + this._onTabReady = this._emitEvent.bind(this, "ready"); + this._onTabOpen = this._onTabEvent.bind(this, "open"); + this._onTabClose = this._onTabEvent.bind(this, "close"); + this._onTabActivate = this._onTabEvent.bind(this, "activate"); + this._onTabDeactivate = this._onTabEvent.bind(this, "deactivate"); + + for each (let tab in getTabs(this._window)) { + // We emulate "open" events for all open tabs since gecko does not emits + // them on the tabs that new windows are open with. Also this is + // necessary to synchronize tabs lists with an actual state. + this._onTabOpen(tab); + } + // We also emulate "activate" event so that it's picked up by a tab list. + this._onTabActivate(getActiveTab(this._window)); + + // Setting up event listeners + tabsObserver.on("open", this._onTabOpen); + tabsObserver.on("close", this._onTabClose); + tabsObserver.on("activate", this._onTabActivate); + tabsObserver.on("deactivate", this._onTabDeactivate); + }, + _destroyWindowTabTracker: function _destroyWindowTabTracker() { + // We emulate close events on all tabs, since gecko does not emits such + // events by itself. + for each (let tab in this.tabs) + this._emitEvent("close", tab); + + this._tabs._clear(); + + tabsObserver.removeListener("open", this._onTabOpen); + tabsObserver.removeListener("close", this._onTabClose); + tabsObserver.removeListener("activate", this._onTabActivate); + tabsObserver.removeListener("deactivate", this._onTabDeactivate); + }, + _onTabEvent: function _onTabEvent(type, tab) { + if (this._window === getOwnerWindow(tab)) { + let options = this._tabOptions.shift() || {}; + options.tab = tab; + options.window = this._public; + // creating tab wrapper and adding listener to "ready" events. + let wrappedTab = Tab(options); + + // Setting up an event listener for ready events. + if (type === "open") + wrappedTab.on("ready", this._onTabReady); + + this._emitEvent(type, wrappedTab); + } + }, + _emitEvent: function _emitEvent(type, tab) { + // Notifies combined tab list that tab was added / removed. + tabs._emit(type, tab); + // Notifies contained tab list that window was added / removed. + this._tabs._emit(type, tab); + } +}); +exports.WindowTabTracker = WindowTabTracker; + +/** + * This trait is used to create live representation of open tab lists. Each + * window wrapper's tab list is represented by an object created from this + * trait. It is also used to represent list of all the open windows. Trait is + * composed out of `EventEmitter` in order to emit 'TabOpen', 'TabClose' events. + * **Please note** that objects created by this trait can't be exposed outside + * instead you should expose it's `_public` property, see comments in + * constructor for details. + */ +const TabList = List.resolve({ constructor: "_init" }).compose( + // This is ugly, but necessary. Will be removed by #596248 + EventEmitter.resolve({ toString: null }), + Trait.compose({ + on: Trait.required, + _emit: Trait.required, + constructor: function TabList(options) { + this._window = options.window; + // Add new items to the list + this.on(EVENTS.open.name, this._add.bind(this)); + // Remove closed items from the list + this.on(EVENTS.close.name, this._remove.bind(this)); + + // Set value whenever new tab becomes active. + this.on("activate", function onTabActivate(tab) { + this._activeTab = tab; + }.bind(this)); + // Initialize list. + this._init(); + // This list is not going to emit any events, object holding this list + // will do it instead, to make that possible we return a private API. + return this; + }, + get activeTab() this._activeTab, + _activeTab: null, + + open: function open(options) { + options = Options(options); + this._window._tabOptions.push(options); + let tab = openTab(this._window._window, options.url); + if (!options.inBackground) + activateTab(tab); + } + // This is ugly, but necessary. Will be removed by #596248 + }).resolve({ toString: null }) +); + +/** + * Combined list of all open tabs on all the windows. + * type {TabList} + */ +var tabs = TabList({ window: null }); +exports.tabs = tabs._public; + +/** + * Trait is a part of composition that represents window wrapper. This trait is + * composed out of `WindowTabTracker` that allows it to keep track of open tabs + * on the window being wrapped. + */ +const WindowTabs = Trait.compose( + WindowTabTracker, + Trait.compose({ + _window: Trait.required, + /** + * List of tabs + */ + get tabs() (this._tabs || (this._tabs = TabList({ window: this })))._public, + _tabs: null, + }) +); +exports.WindowTabs = WindowTabs; |