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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/. */
'use strict';
module.metadata = {
"stability": "unstable"
};
const { Cc, Ci } = require('chrome');
const { defer } = require('../lang/functional');
const observers = require('../deprecated/observer-service');
const { emit, on, once, off } = require('../event/core');
const { when: unload } = require('../system/unload');
const { getWindowLoadingContext } = require('../window/utils');
const { deprecateFunction } = require('../util/deprecate');
let deferredEmit = defer(emit);
let pbService;
// Currently, only Firefox implements the private browsing service.
if (require("../system/xul-app").is("Firefox")) {
pbService = Cc["@mozilla.org/privatebrowsing;1"].
getService(Ci.nsIPrivateBrowsingService);
// set up an observer for private browsing switches.
observers.add('private-browsing-transition-complete', function onChange() {
// Emit event with in next turn of event loop.
deferredEmit(exports, pbService.privateBrowsingEnabled ? 'start' : 'stop');
});
}
// checks that per-window private browsing implemented
let isWindowPBEnabled = function isWindowPBEnabled(chromeWin) {
return !!(chromeWin &&
'gPrivateBrowsingUI' in chromeWin &&
'privateWindow' in chromeWin.gPrivateBrowsingUI);
}
exports.isWindowPBEnabled = isWindowPBEnabled;
// We toggle private browsing mode asynchronously in order to work around
// bug 659629. Since private browsing transitions are asynchronous
// anyway, this doesn't significantly change the behavior of the API.
// Note: this method should not be used with `chromeWin` argument until
// the UI has been implemented. Bug 729865
let setMode = defer(function setMode(value, chromeWin) {
value = !!value; // Cast to boolean.
if (isWindowPBEnabled(chromeWin))
return getWindowLoadingContext(chromeWin).usePrivateBrowsing = value;
// default
return pbService && (pbService.privateBrowsingEnabled = value);
});
exports.setMode = deprecateFunction(
setMode,
'require("private-browsing").activate and require("private-browsing").deactivate ' +
'is deprecated.'
);
let getMode = function getMode(chromeWin) {
if (isWindowPBEnabled(chromeWin))
return getWindowLoadingContext(chromeWin).usePrivateBrowsing;
// default
return pbService ? pbService.privateBrowsingEnabled : false;
};
exports.getMode = getMode;
exports.on = on.bind(null, exports);
// Make sure listeners are cleaned up.
unload(function() off(exports));
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