michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 'use strict';
michael@0: 
michael@0: const { Class } = require('../core/heritage');
michael@0: const { BrowserWindow } = require('../window/browser');
michael@0: const { WindowTracker } = require('../deprecated/window-utils');
michael@0: const { isBrowser, getMostRecentBrowserWindow } = require('../window/utils');
michael@0: const { windowNS } = require('../window/namespace');
michael@0: const { on, off, once, emit } = require('../event/core');
michael@0: const { method } = require('../lang/functional');
michael@0: const { EventTarget } = require('../event/target');
michael@0: const { List, addListItem } = require('../util/list');
michael@0: 
michael@0: const ERR_FENNEC_MSG = 'This method is not yet supported by Fennec, consider using require("sdk/tabs") instead';
michael@0: 
michael@0: // NOTE: On Fennec there is only one window.
michael@0: 
michael@0: let BrowserWindows = Class({
michael@0:   implements: [ List ],
michael@0:   extends: EventTarget,
michael@0:   initialize: function() {
michael@0:     List.prototype.initialize.apply(this);
michael@0:   },
michael@0:   get activeWindow() {
michael@0:     let window = getMostRecentBrowserWindow();
michael@0:     return window ? getBrowserWindow({window: window}) : null;
michael@0:   },
michael@0:   open: function open(options) {
michael@0:     throw new Error(ERR_FENNEC_MSG);
michael@0:     return null;
michael@0:   }
michael@0: });
michael@0: const browserWindows = exports.browserWindows = BrowserWindows();
michael@0: 
michael@0: 
michael@0: /**
michael@0:  * Gets a `BrowserWindow` for the given `chromeWindow` if previously
michael@0:  * registered, `null` otherwise.
michael@0:  */
michael@0: function getRegisteredWindow(chromeWindow) {
michael@0:   for each (let window in browserWindows) {
michael@0:     if (chromeWindow === windowNS(window).window)
michael@0:       return window;
michael@0:   }
michael@0: 
michael@0:   return null;
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * Gets a `BrowserWindow` for the provided window options obj
michael@0:  * @params {Object} options
michael@0:  *    Options that are passed to the the `BrowserWindowTrait`
michael@0:  * @returns {BrowserWindow}
michael@0:  */
michael@0: function getBrowserWindow(options) {
michael@0:   let window = null;
michael@0: 
michael@0:   // if we have a BrowserWindow already then use it
michael@0:   if ('window' in options)
michael@0:     window = getRegisteredWindow(options.window);
michael@0:   if (window)
michael@0:     return window;
michael@0: 
michael@0:   // we don't have a BrowserWindow yet, so create one
michael@0:   var window = BrowserWindow(options);
michael@0:   addListItem(browserWindows, window);
michael@0:   return window;
michael@0: }
michael@0: 
michael@0: WindowTracker({
michael@0:   onTrack: function onTrack(chromeWindow) {
michael@0:     if (!isBrowser(chromeWindow)) return;
michael@0:     let window = getBrowserWindow({ window: chromeWindow });
michael@0:     emit(browserWindows, 'open', window);
michael@0:   },
michael@0:   onUntrack: function onUntrack(chromeWindow) {
michael@0:     if (!isBrowser(chromeWindow)) return;
michael@0:     let window = getBrowserWindow({ window: chromeWindow });
michael@0:     emit(browserWindows, 'close', window);
michael@0:   }
michael@0: });