зеркало из https://github.com/mozilla/gecko-dev.git
126 строки
3.7 KiB
JavaScript
126 строки
3.7 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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this.EXPORTED_SYMBOLS = ["Bootstraper"];
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const Cc = Components.classes;
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const Ci = Components.interfaces;
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const Cu = Components.utils;
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const CC = Components.Constructor;
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Cu.import("resource://gre/modules/Services.jsm");
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function debug(aMsg) {
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//dump("-*- Bootstraper: " + aMsg + "\n");
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}
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/**
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* This module loads the manifest for app from the --start-url enpoint and
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* ensures that it's installed as the system app.
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*/
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this.Bootstraper = {
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_manifestURL: null,
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bailout: function(aMsg) {
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dump("************************************************************\n");
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dump("* /!\\ " + aMsg + "\n");
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dump("************************************************************\n");
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let appStartup = Cc["@mozilla.org/toolkit/app-startup;1"]
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.getService(Ci.nsIAppStartup);
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appStartup.quit(appStartup.eForceQuit);
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},
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/**
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* Resolves to a json manifest.
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*/
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loadManifest: function() {
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return new Promise((aResolve, aReject) => {
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debug("Loading manifest " + this._manifestURL);
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let xhr = Cc["@mozilla.org/xmlextras/xmlhttprequest;1"]
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.createInstance(Ci.nsIXMLHttpRequest);
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xhr.mozBackgroundRequest = true;
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xhr.open("GET", this._manifestURL);
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xhr.responseType = "json";
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xhr.addEventListener("load", () => {
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if (xhr.status >= 200 && xhr.status < 400) {
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debug("Success loading " + this._manifestURL);
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aResolve(xhr.response);
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} else {
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aReject("Error loading " + this._manifestURL);
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}
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});
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xhr.addEventListener("error", () => {
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aReject("Error loading " + this._manifestURL);
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});
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xhr.send(null);
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});
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},
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configure: function() {
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Services.prefs.setCharPref("b2g.system_manifest_url", this._manifestURL);
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Services.prefs.setCharPref("b2g.system_startup_url", "");
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return Promise.resolve();
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},
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/**
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* If a system app is already installed, uninstall it so that we can
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* cleanly replace it by the current one.
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*/
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uninstallPreviousSystemApp: function() {
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// TODO: FIXME
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return Promise.resolve();
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let oldManifestURL;
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try{
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oldManifestURL = Services.prefs.getCharPref("b2g.system_manifest_url");
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} catch(e) {
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// No preference set, so nothing to uninstall.
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return Promise.resolve();
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}
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let id = DOMApplicationRegistry.getAppLocalIdByManifestURL(oldManifestURL);
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if (id == Ci.nsIScriptSecurityManager.NO_APP_ID) {
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return Promise.resolve();
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}
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debug("Uninstalling " + oldManifestURL);
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return DOMApplicationRegistry.uninstall(oldManifestURL);
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},
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/**
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* Check if we are already configured to run from this manifest url.
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*/
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isInstallRequired: function(aManifestURL) {
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try {
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if (Services.prefs.getCharPref("b2g.system_manifest_url") == aManifestURL) {
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return false;
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}
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} catch(e) { }
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return true;
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},
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/**
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* Resolves once we have installed the app.
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*/
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ensureSystemAppInstall: function(aManifestURL) {
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this._manifestURL = aManifestURL;
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debug("Installing app from " + this._manifestURL);
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if (!this.isInstallRequired(this._manifestURL)) {
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debug("Already configured for " + this._manifestURL);
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return Promise.resolve();
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}
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return new Promise((aResolve, aReject) => {
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this.uninstallPreviousSystemApp.bind(this)
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.then(this.loadManifest.bind(this))
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.then(this.configure.bind(this))
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.then(aResolve)
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.catch(aReject);
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});
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}
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};
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