gecko/webapprt/Startup.jsm

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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/. */
/* This module is imported at the startup of an application. It takes care of
* permissions installation, application url loading, security settings. Put
* stuff here that you want to happen once on startup before the webapp is
* loaded. */
this.EXPORTED_SYMBOLS = ["startup"];
const Ci = Components.interfaces;
const Cu = Components.utils;
Cu.import("resource://gre/modules/Services.jsm");
// Initialize DOMApplicationRegistry by importing Webapps.jsm.
Cu.import("resource://gre/modules/Webapps.jsm");
Cu.import("resource://gre/modules/AppsUtils.jsm");
Cu.import("resource://gre/modules/PermissionsInstaller.jsm");
Cu.import("resource://gre/modules/Task.jsm");
Cu.import("resource://gre/modules/Promise.jsm");
// Initialize window-independent handling of webapps- notifications.
Cu.import("resource://webapprt/modules/WebappsHandler.jsm");
Cu.import("resource://webapprt/modules/WebappRT.jsm");
function isFirstRunOrUpdate() {
let savedBuildID = null;
try {
savedBuildID = Services.prefs.getCharPref("webapprt.buildID");
} catch (e) {}
let ourBuildID = Services.appinfo.platformBuildID;
if (ourBuildID != savedBuildID) {
Services.prefs.setCharPref("webapprt.buildID", ourBuildID);
return true;
}
return false;
}
// Observes all the events needed to actually launch an application.
// It waits for XUL window and webapps registry loading.
this.startup = function(window) {
return Task.spawn(function () {
// Observe registry loading.
let deferredRegistry = Promise.defer();
function observeRegistryLoading() {
Services.obs.removeObserver(observeRegistryLoading, "webapps-registry-start");
deferredRegistry.resolve();
}
Services.obs.addObserver(observeRegistryLoading, "webapps-registry-start", false);
// Observe XUL window loading.
// For tests, it could be already loaded.
let deferredWindowLoad = Promise.defer();
if (window.document && window.document.getElementById("content")) {
deferredWindowLoad.resolve();
} else {
window.addEventListener("load", function onLoad() {
window.removeEventListener("load", onLoad, false);
deferredWindowLoad.resolve();
});
}
// Wait for webapps registry loading.
yield deferredRegistry.promise;
// Install/update permissions and get the appID from the webapps registry.
let appID = Ci.nsIScriptSecurityManager.NO_APP_ID;
let manifestURL = WebappRT.config.app.manifestURL;
if (manifestURL) {
appID = DOMApplicationRegistry.getAppLocalIdByManifestURL(manifestURL);
// On firstrun, set permissions to their default values.
// When the webapp runtime is updated, update the permissions.
// TODO: Update the permissions when the application is updated.
if (isFirstRunOrUpdate(Services.prefs)) {
PermissionsInstaller.installPermissions(WebappRT.config.app, true);
}
}
// Wait for XUL window loading
yield deferredWindowLoad.promise;
// Get the <browser> element in the webapp.xul window.
let appBrowser = window.document.getElementById("content");
// Set the principal to the correct appID and launch the application.
appBrowser.docShell.setIsApp(appID);
appBrowser.setAttribute("src", WebappRT.launchURI);
}).then(null, Cu.reportError.bind(Cu));
}