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 file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: this.EXPORTED_SYMBOLS = ["PrivateBrowsingUtils"];
michael@0: 
michael@0: Components.utils.import("resource://gre/modules/Services.jsm");
michael@0: 
michael@0: const kAutoStartPref = "browser.privatebrowsing.autostart";
michael@0: 
michael@0: // This will be set to true when the PB mode is autostarted from the command
michael@0: // line for the current session.
michael@0: let gTemporaryAutoStartMode = false;
michael@0: 
michael@0: const Cc = Components.classes;
michael@0: const Ci = Components.interfaces;
michael@0: 
michael@0: this.PrivateBrowsingUtils = {
michael@0:   isWindowPrivate: function pbu_isWindowPrivate(aWindow) {
michael@0:     return this.privacyContextFromWindow(aWindow).usePrivateBrowsing;
michael@0:   },
michael@0: 
michael@0:   privacyContextFromWindow: function pbu_privacyContextFromWindow(aWindow) {
michael@0:     return aWindow.QueryInterface(Ci.nsIInterfaceRequestor)
michael@0:                   .getInterface(Ci.nsIWebNavigation)
michael@0:                   .QueryInterface(Ci.nsILoadContext);
michael@0:   },
michael@0: 
michael@0:   get permanentPrivateBrowsing() {
michael@0:     try {
michael@0:       return gTemporaryAutoStartMode ||
michael@0:              Services.prefs.getBoolPref(kAutoStartPref);
michael@0:     } catch (e) {
michael@0:       // The pref does not exist
michael@0:       return false;
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   // These should only be used from internal code
michael@0:   enterTemporaryAutoStartMode: function pbu_enterTemporaryAutoStartMode() {
michael@0:     gTemporaryAutoStartMode = true;
michael@0:   },
michael@0:   get isInTemporaryAutoStartMode() {
michael@0:     return gTemporaryAutoStartMode;
michael@0:   },
michael@0: 
michael@0:   whenHiddenPrivateWindowReady: function pbu_whenHiddenPrivateWindowReady(cb) {
michael@0:     Components.utils.import("resource://gre/modules/Timer.jsm");
michael@0: 
michael@0:     let win = Services.appShell.hiddenPrivateDOMWindow;
michael@0:     function isNotLoaded() {
michael@0:       return ["complete", "interactive"].indexOf(win.document.readyState) == -1;
michael@0:     }
michael@0:     if (isNotLoaded()) {
michael@0:       setTimeout(function poll() {
michael@0:         if (isNotLoaded()) {
michael@0:           setTimeout(poll, 100);
michael@0:           return;
michael@0:         }
michael@0:         cb(Services.appShell.hiddenPrivateDOMWindow);
michael@0:       }, 4);
michael@0:     } else {
michael@0:       cb(Services.appShell.hiddenPrivateDOMWindow);
michael@0:     }
michael@0:   }
michael@0: };
michael@0: