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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";
const {Cc,Ci} = require("chrome");
const observers = require("api-utils/observer-service");
const { EventEmitter } = require("api-utils/events");
const { setTimeout } = require("api-utils/timer");
const unload = require("api-utils/unload");
const ON_START = "start";
const ON_STOP = "stop";
const ON_TRANSITION = "private-browsing-transition-complete";
let pbService;
// Currently, only Firefox implements the private browsing service.
if (require("api-utils/xul-app").is("Firefox")) {
pbService = Cc["@mozilla.org/privatebrowsing;1"].
getService(Ci.nsIPrivateBrowsingService);
}
function toggleMode(value) pbService.privateBrowsingEnabled = !!value
const privateBrowsing = EventEmitter.compose({
constructor: function PrivateBrowsing() {
// Binding method to instance since it will be used with `setTimeout`.
this._emitOnObject = this._emitOnObject.bind(this);
this.unload = this.unload.bind(this);
// Report unhandled errors from listeners
this.on("error", console.exception.bind(console));
unload.ensure(this);
// We only need to add observers if `pbService` exists.
if (pbService) {
observers.add(ON_TRANSITION, this.onTransition.bind(this));
this._isActive = pbService.privateBrowsingEnabled;
}
},
unload: function _destructor() {
this._removeAllListeners();
},
// We don't need to do anything with cancel here.
onTransition: function onTransition() {
let isActive = this._isActive = pbService.privateBrowsingEnabled;
setTimeout(this._emitOnObject, 0, exports, isActive ? ON_START : ON_STOP);
},
get isActive() this._isActive,
set isActive(value) {
if (pbService)
// 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.
setTimeout(toggleMode, 0, value);
},
_isActive: false
})()
Object.defineProperty(exports, "isActive", {
get: function() privateBrowsing.isActive
});
exports.activate = function activate() privateBrowsing.isActive = true;
exports.deactivate = function deactivate() privateBrowsing.isActive = false;
exports.on = privateBrowsing.on;
exports.once = privateBrowsing.once;
exports.removeListener = privateBrowsing.removeListener;
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