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: 
michael@0: 'use strict';
michael@0: 
michael@0: this.EXPORTED_SYMBOLS = [];
michael@0: 
michael@0: #ifdef XP_WIN
michael@0: #ifdef MOZ_METRO
michael@0: 
michael@0: const {classes: Cc, interfaces: Ci, results: Cr, utils: Cu, manager: Cm} =
michael@0:   Components;
michael@0: const PREF_BASE_KEY = "Software\\Mozilla\\Firefox\\Metro\\Prefs\\";
michael@0: 
michael@0: Cu.import("resource://gre/modules/XPCOMUtils.jsm");
michael@0: Cu.import("resource://gre/modules/Services.jsm");
michael@0: 
michael@0: this.EXPORTED_SYMBOLS = [ "WindowsPrefSync" ];
michael@0: 
michael@0: /**
michael@0:  * Manages preferences that need to be pulled and pushed between Metro
michael@0:  * and desktop.
michael@0:  */
michael@0: this.WindowsPrefSync = {
michael@0:   init: function() {
michael@0:     this.pullSharedPrefs();
michael@0:     this.prefListToPush.forEach(function(prefName) {
michael@0:       this.pushSharedPref(prefName);
michael@0:       Services.prefs.addObserver(prefName, this, false);
michael@0:     }, this);
michael@0:   },
michael@0: 
michael@0:   uninit: function() {
michael@0:     this.prefListToPush.forEach(function(prefName) {
michael@0:         Services.prefs.removeObserver(prefName, this);
michael@0:     }, this);
michael@0:   },
michael@0: 
michael@0:   /**
michael@0:    * Returns the list of prefs that should be pushed for the current
michael@0:    * environment.
michael@0:    */
michael@0:   get prefListToPush() {
michael@0:     return !Services.metro.immersive ? this.desktopControlledPrefs :
michael@0:       this.metroControlledPrefs;
michael@0:   },
michael@0: 
michael@0:   /**
michael@0:    * Returns the list of prefs that should be pulled for the current
michael@0:    * environment.
michael@0:    */
michael@0:   get prefListToPull() {
michael@0:     return Services.metro.immersive ? this.desktopControlledPrefs :
michael@0:       this.metroControlledPrefs;
michael@0:   },
michael@0: 
michael@0:   /**
michael@0:    * The following preferences will be pushed to registry from Desktop
michael@0:    * Firefox and pulled in from Metro Firefox.
michael@0:    *
michael@0:    * app.update.* prefs are because Metro shares an installation directory with
michael@0:    * Firefox, and the options for these are only present in the Desktop options.
michael@0:    *
michael@0:    * browser.sessionstore.resume_session_once is mainly for the switch to Metro
michael@0:    * and switch to Desktop feature.
michael@0:    *
michael@0:    * browser.startup.page - if a desktop Firefox user wants her/his sessions
michael@0:    * to always restore, we need to honor that in metro Firefox as well.
michael@0:    */
michael@0:   desktopControlledPrefs: ["app.update.auto",
michael@0:     "app.update.enabled",
michael@0:     "app.update.service.enabled",
michael@0:     "app.update.metro.enabled",
michael@0:     "browser.sessionstore.resume_session_once",
michael@0:     "browser.startup.page"],
michael@0: 
michael@0:   /**
michael@0:    * Returns the base path where registry sync prefs are stored.
michael@0:    */
michael@0:   get prefRegistryPath() {
michael@0:     let profileService = Cc["@mozilla.org/toolkit/profile-service;1"].
michael@0:       createInstance(Ci.nsIToolkitProfileService);
michael@0:     return PREF_BASE_KEY + profileService.selectedProfile.name + "\\";
michael@0:   },
michael@0: 
michael@0:   /**
michael@0:    * The following preferences will be pushed to registry from Metro
michael@0:    * Firefox and pulled in from Desktop Firefox.
michael@0:    *
michael@0:    * browser.sessionstore.resume_session_once is mainly for the switch to Metro
michael@0:    * and switch to Desktop feature.
michael@0:    */
michael@0:   metroControlledPrefs: ["browser.sessionstore.resume_session_once"],
michael@0: 
michael@0:   /**
michael@0:    * Observes preference changes and writes them to the registry, only
michael@0:    * the list of preferences initialized will be observed
michael@0:    */
michael@0:   observe: function (aSubject, aTopic, aPrefName) {
michael@0:     if (aTopic != "nsPref:changed")
michael@0:       return;
michael@0: 
michael@0:     this.pushSharedPref(aPrefName);
michael@0:   },
michael@0: 
michael@0:   /**
michael@0:    * Writes the pref to HKCU in the registry and adds a pref-observer to keep
michael@0:    * the registry in sync with changes to the value.
michael@0:    */
michael@0:   pushSharedPref : function(aPrefName) {
michael@0:     let registry = Cc["@mozilla.org/windows-registry-key;1"].
michael@0:       createInstance(Ci.nsIWindowsRegKey);
michael@0:     try {
michael@0:       var prefType = Services.prefs.getPrefType(aPrefName);
michael@0:       let prefFunc;
michael@0:       if (prefType == Ci.nsIPrefBranch.PREF_INT)
michael@0:         prefFunc = "getIntPref";
michael@0:       else if (prefType == Ci.nsIPrefBranch.PREF_BOOL)
michael@0:         prefFunc = "getBoolPref";
michael@0:       else if (prefType == Ci.nsIPrefBranch.PREF_STRING)
michael@0:         prefFunc = "getCharPref";
michael@0:       else
michael@0:         throw "Unsupported pref type";
michael@0: 
michael@0:       let prefValue = Services.prefs[prefFunc](aPrefName);
michael@0:       registry.create(Ci.nsIWindowsRegKey.ROOT_KEY_CURRENT_USER,
michael@0:         this.prefRegistryPath + prefType, Ci.nsIWindowsRegKey.ACCESS_WRITE);
michael@0:       // Always write as string, but the registry subfolder will determine
michael@0:       // how Metro interprets that string value.
michael@0:       registry.writeStringValue(aPrefName, prefValue);
michael@0:     } catch (ex) {
michael@0:       Cu.reportError("Couldn't push pref " + aPrefName + ": " + ex);
michael@0:     } finally {
michael@0:       registry.close();
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   /**
michael@0:    * Pulls in all shared prefs from the registry
michael@0:    */
michael@0:   pullSharedPrefs: function() {
michael@0:     function pullSharedPrefType(prefType, prefFunc) {
michael@0:       try {
michael@0:         registry.create(Ci.nsIWindowsRegKey.ROOT_KEY_CURRENT_USER,
michael@0:           self.prefRegistryPath + prefType,
michael@0:           Ci.nsIWindowsRegKey.ACCESS_ALL);
michael@0:         for (let i = 0; i < registry.valueCount; i++) {
michael@0:           let prefName = registry.getValueName(i);
michael@0:           let prefValue = registry.readStringValue(prefName);
michael@0:           if (prefType == Ci.nsIPrefBranch.PREF_BOOL) {
michael@0:             prefValue = prefValue == "true";
michael@0:           }
michael@0:           if (self.prefListToPull.indexOf(prefName) != -1) {
michael@0:             Services.prefs[prefFunc](prefName, prefValue);
michael@0:           }
michael@0:         }
michael@0:       } catch (ex) {
michael@0:         dump("Could not pull for prefType " + prefType + ": " + ex + "\n");
michael@0:       } finally {
michael@0:         registry.close();
michael@0:       }
michael@0:     }
michael@0:     let self = this;
michael@0:     let registry = Cc["@mozilla.org/windows-registry-key;1"].
michael@0:       createInstance(Ci.nsIWindowsRegKey);
michael@0:     pullSharedPrefType(Ci.nsIPrefBranch.PREF_INT, "setIntPref");
michael@0:     pullSharedPrefType(Ci.nsIPrefBranch.PREF_BOOL, "setBoolPref");
michael@0:     pullSharedPrefType(Ci.nsIPrefBranch.PREF_STRING, "setCharPref");
michael@0:   }
michael@0: };
michael@0: #endif
michael@0: #endif