b38dea0597
Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.
87 lines
3 KiB
JavaScript
Executable file
87 lines
3 KiB
JavaScript
Executable file
'use strict';
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/* global applications, SettingsCache, LandingAppWindow,
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HomescreenLauncher */
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(function(exports) {
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/**
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* LandingAppLauncher is responsible for launching the landing app window
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* instance and make sure it's a singleton.
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*
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* @class LandingAppLauncher
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* @requires HomescreenLauncher
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* @requires LandingAppWindow
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*/
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var LandingAppLauncher = function() {
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};
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LandingAppLauncher.prototype = Object.create(HomescreenLauncher.prototype);
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var proto = LandingAppLauncher.prototype;
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proto._settingsKey = 'landing_app.manifestURL';
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proto.__defineGetter__('hasLandingApp', function lal_hasLandingApp() {
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return !!this._checkManifestURL();
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});
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proto._checkManifestURL = function lal_checkManifestURL(manifestURL) {
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return !!applications.getByManifestURL(manifestURL ||
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this._currentManifestURL);
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};
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proto._fetchSettings = function lal_fetchSettings() {
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var that = this;
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SettingsCache.observe(this._settingsKey, '',
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// XXX: After landing of bug 976986, we should write a deregister
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// function of onRetrievingHomescreenManifestURL
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// see https://bugzilla.mozilla.org/show_bug.cgi?id=976998
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function onRetrievingHomescreenManifestURL(value) {
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var previousManifestURL = that._currentManifestURL;
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that._currentManifestURL = value;
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if (typeof(that._instance) !== 'undefined') {
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if (previousManifestURL !== '' &&
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previousManifestURL !== that._currentManifestURL) {
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that._instance.kill();
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that._instance = new LandingAppWindow(value);
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// Dispatch 'homescreen is changed' event.
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// Landing app is a kind of homescreen, we use homescreen-changed
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// event to notify app_window_manager to reload homescreen.
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window.dispatchEvent(new CustomEvent('landing-app-changed'));
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} else {
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that._instance.ensure();
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}
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}
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if (!that._checkManifestURL()) {
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console.warn('We enable landing app but without defining it?');
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}
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that._ready = true;
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window.dispatchEvent(new CustomEvent('landing-app-ready'));
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});
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};
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/**
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* Get instance of homescreen window singleton
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*
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* @memberOf LandingAppLauncher.prototype
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* @params {Boolean} ensure Ensure the homescreen app is alive.
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* @returns {LandingAppWindow} Instance of homescreen window singleton, or
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* null if LandingAppLauncher is not ready
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*/
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proto.getHomescreen = function hl_getAppWindow(ensure) {
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if (!this.hasLandingApp) {
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console.warn('LandingAppLauncher: do not have a landing app.');
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return null;
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}
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if (typeof this._instance == 'undefined') {
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this._instance = new LandingAppWindow(this._currentManifestURL);
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return this._instance;
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} else {
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if (ensure) {
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this._instance.ensure();
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}
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return this._instance;
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}
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};
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exports.LandingAppLauncher = LandingAppLauncher;
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}(window));
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