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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
if (!require("api-utils/xul-app").is("Firefox")) {
throw new Error([
"The windows module currently supports only Firefox. In the future",
" we would like it to support other applications, however. Please see ",
"https://bugzilla.mozilla.org/show_bug.cgi?id=571449 for more information."
].join(""));
}
const { Cc, Ci } = require('chrome'),
{ Trait } = require('api-utils/traits'),
{ List } = require('api-utils/list'),
{ EventEmitter } = require('api-utils/events'),
{ WindowTabs, WindowTabTracker } = require('api-utils/windows/tabs'),
{ WindowDom } = require('api-utils/windows/dom'),
{ WindowLoader } = require('api-utils/windows/loader'),
{ WindowTrackerTrait } = require('api-utils/window-utils'),
{ Options } = require('api-utils/tabs/tab'),
apiUtils = require('api-utils/api-utils'),
unload = require('api-utils/unload'),
WM = Cc['@mozilla.org/appshell/window-mediator;1'].
getService(Ci.nsIWindowMediator),
BROWSER = 'navigator:browser';
/**
* Window trait composes safe wrappers for browser window that are E10S
* compatible.
*/
const BrowserWindowTrait = Trait.compose(
EventEmitter,
WindowDom.resolve({ close: '_close' }),
WindowTabs,
WindowTabTracker,
WindowLoader,
/* WindowSidebars, */
Trait.compose({
_emit: Trait.required,
_close: Trait.required,
_load: Trait.required,
/**
* Constructor returns wrapper of the specified chrome window.
* @param {nsIWindow} window
*/
constructor: function BrowserWindow(options) {
// Register this window ASAP, in order to avoid loop that would try
// to create this window instance over and over (see bug 648244)
windows.push(this);
// make sure we don't have unhandled errors
this.on('error', console.exception.bind(console));
if ('onOpen' in options)
this.on('open', options.onOpen);
if ('onClose' in options)
this.on('close', options.onClose);
if ('window' in options)
this._window = options.window;
if ('tabs' in options) {
this._tabOptions = Array.isArray(options.tabs) ?
options.tabs.map(Options) :
[ Options(options.tabs) ];
}
else if ('url' in options) {
this._tabOptions = [ Options(options.url) ];
}
this._load();
return this;
},
destroy: function () this._onUnload(),
_tabOptions: [],
_onLoad: function() {
try {
this._initWindowTabTracker();
} catch(e) {
this._emit('error', e)
}
this._emitOnObject(browserWindows, 'open', this._public);
},
_onUnload: function() {
if (!this._window)
return;
this._destroyWindowTabTracker();
this._emitOnObject(browserWindows, 'close', this._public);
this._window = null;
// Removing reference from the windows array.
windows.splice(windows.indexOf(this), 1);
this._removeAllListeners();
},
close: function close(callback) {
// maybe we should deprecate this with message ?
if (callback) this.on('close', callback);
return this._close();
}
})
);
/**
* Wrapper for `BrowserWindowTrait`. Creates new instance if wrapper for
* window doesn't exists yet. If wrapper already exists then returns it
* instead.
* @params {Object} options
* Options that are passed to the the `BrowserWindowTrait`
* @returns {BrowserWindow}
* @see BrowserWindowTrait
*/
function BrowserWindow(options) {
let chromeWindow = options.window;
for each (let window in windows) {
if (chromeWindow == window._window)
return window._public
}
let window = BrowserWindowTrait(options);
return window._public;
}
// to have proper `instanceof` behavior will go away when #596248 is fixed.
BrowserWindow.prototype = BrowserWindowTrait.prototype;
exports.BrowserWindow = BrowserWindow
const windows = [];
/**
* `BrowserWindows` trait is composed out of `List` trait and it represents
* "live" list of currently open browser windows. Instance mutates itself
* whenever new browser window gets opened / closed.
*/
// Very stupid to resolve all `toStrings` but this will be fixed by #596248
const browserWindows = Trait.resolve({ toString: null }).compose(
List.resolve({ constructor: '_initList' }),
EventEmitter.resolve({ toString: null }),
WindowTrackerTrait.resolve({ constructor: '_initTracker', toString: null }),
Trait.compose({
_emit: Trait.required,
_add: Trait.required,
_remove: Trait.required,
// public API
/**
* Constructor creates instance of `Windows` that represents live list of open
* windows.
*/
constructor: function BrowserWindows() {
this._trackedWindows = [];
this._initList();
this._initTracker();
unload.ensure(this, "_destructor");
},
_destructor: function _destructor() {
this._removeAllListeners('open');
this._removeAllListeners('close');
this._clear();
},
/**
* This property represents currently active window.
* Property is non-enumerable, in order to preserve array like enumeration.
* @type {Window|null}
*/
get activeWindow() {
let window = WM.getMostRecentWindow(BROWSER);
return this._isBrowser(window) ? BrowserWindow({ window: window }) : null;
},
open: function open(options) {
if (typeof options === "string")
// `tabs` option is under review and may be removed.
options = { tabs: [Options(options)] };
return BrowserWindow(options);
},
/**
* Returns true if specified window is a browser window.
* @param {nsIWindow} window
* @returns {Boolean}
*/
_isBrowser: function _isBrowser(window)
BROWSER === window.document.documentElement.getAttribute("windowtype")
,
/**
* Internal listener which is called whenever new window gets open.
* Creates wrapper and adds to this list.
* @param {nsIWindow} chromeWindow
*/
_onTrack: function _onTrack(chromeWindow) {
if (!this._isBrowser(chromeWindow)) return;
let window = BrowserWindow({ window: chromeWindow });
this._add(window);
this._emit('open', window);
},
/**
* Internal listener which is called whenever window gets closed.
* Cleans up references and removes wrapper from this list.
* @param {nsIWindow} window
*/
_onUntrack: function _onUntrack(chromeWindow) {
if (!this._isBrowser(chromeWindow)) return;
let window = BrowserWindow({ window: chromeWindow });
this._remove(window);
this._emit('close', window);
// Bug 724404: do not leak this module and linked windows:
// We have to do it on untrack and not only when `_onUnload` is called
// when windows are closed, otherwise, we will leak on addon disabling.
window.destroy();
}
}).resolve({ toString: null })
)();
exports.browserWindows = browserWindows;
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