gecko/toolkit/content/PrivateBrowsingUtils.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.EXPORTED_SYMBOLS = ["PrivateBrowsingUtils"];
Components.utils.import("resource://gre/modules/Services.jsm");
const kAutoStartPref = "browser.components.autostart";
const Cc = Components.classes;
const Ci = Components.interfaces;
this.PrivateBrowsingUtils = {
isWindowPrivate: function pbu_isWindowPrivate(aWindow) {
return this.privacyContextFromWindow(aWindow).usePrivateBrowsing;
},
privacyContextFromWindow: function pbu_privacyContextFromWindow(aWindow) {
return aWindow.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIWebNavigation)
.QueryInterface(Ci.nsILoadContext);
},
get permanentPrivateBrowsing() {
#ifdef MOZ_PER_WINDOW_PRIVATE_BROWSING
return Services.prefs.getBoolPref(kAutoStart, false);
#else
try {
return Cc["@mozilla.org/privatebrowsing;1"].
getService(Ci.nsIPrivateBrowsingService).
autoStarted;
} catch (e) {
return false; // PB not supported
}
#endif
}
};
#ifdef MOZ_PER_WINDOW_PRIVATE_BROWSING
function autoStartObserver(aSubject, aTopic, aData) {
var newValue = Services.prefs.getBoolPref(kAutoStart);
var windowsEnum = Services.wm.getEnumerator(null);
while (windowsEnum.hasMoreElements()) {
var window = windowsEnum.getNext();
window.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIWebNavigation)
.QueryInterface(Ci.nsILoadContext)
.usePrivateBrowsing = newValue;
}
}
Services.prefs.addObserver(kAutoStartPref, autoStartObserver, false);
#endif