gecko/b2g/components/KillSwitch.js

117 lines
3.5 KiB
JavaScript

/* 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 DEBUG = false;
function debug(s) {
dump("-*- KillSwitch.js: " + s + "\n");
}
const {interfaces: Ci, utils: Cu} = Components;
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/DOMRequestHelper.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "Services",
"resource://gre/modules/Services.jsm");
XPCOMUtils.defineLazyServiceGetter(this, "cpmm",
"@mozilla.org/childprocessmessagemanager;1",
"nsIMessageSender");
const KILLSWITCH_CID = "{b6eae5c6-971c-4772-89e5-5df626bf3f09}";
const KILLSWITCH_CONTRACTID = "@mozilla.org/moz-kill-switch;1";
const kEnableKillSwitch = "KillSwitch:Enable";
const kEnableKillSwitchOK = "KillSwitch:Enable:OK";
const kEnableKillSwitchKO = "KillSwitch:Enable:KO";
const kDisableKillSwitch = "KillSwitch:Disable";
const kDisableKillSwitchOK = "KillSwitch:Disable:OK";
const kDisableKillSwitchKO = "KillSwitch:Disable:KO";
function KillSwitch() {
this._window = null;
}
KillSwitch.prototype = {
__proto__: DOMRequestIpcHelper.prototype,
init: function(aWindow) {
DEBUG && debug("init");
this._window = aWindow;
this.initDOMRequestHelper(this._window);
},
enable: function() {
DEBUG && debug("KillSwitch: enable");
cpmm.addMessageListener(kEnableKillSwitchOK, this);
cpmm.addMessageListener(kEnableKillSwitchKO, this);
return this.createPromise((aResolve, aReject) => {
cpmm.sendAsyncMessage(kEnableKillSwitch, {
requestID: this.getPromiseResolverId({
resolve: aResolve,
reject: aReject
})
});
});
},
disable: function() {
DEBUG && debug("KillSwitch: disable");
cpmm.addMessageListener(kDisableKillSwitchOK, this);
cpmm.addMessageListener(kDisableKillSwitchKO, this);
return this.createPromise((aResolve, aReject) => {
cpmm.sendAsyncMessage(kDisableKillSwitch, {
requestID: this.getPromiseResolverId({
resolve: aResolve,
reject: aReject
})
});
});
},
receiveMessage: function(message) {
DEBUG && debug("Received: " + message.name);
cpmm.removeMessageListener(kEnableKillSwitchOK, this);
cpmm.removeMessageListener(kEnableKillSwitchKO, this);
cpmm.removeMessageListener(kDisableKillSwitchOK, this);
cpmm.removeMessageListener(kDisableKillSwitchKO, this);
let req = this.takePromiseResolver(message.data.requestID);
switch (message.name) {
case kEnableKillSwitchKO:
case kDisableKillSwitchKO:
req.reject(false);
break;
case kEnableKillSwitchOK:
case kDisableKillSwitchOK:
req.resolve(true);
break;
default:
DEBUG && debug("Unrecognized message: " + message.name);
break;
}
},
classID : Components.ID(KILLSWITCH_CID),
contractID : KILLSWITCH_CONTRACTID,
QueryInterface: XPCOMUtils.generateQI([Ci.nsIKillSwitch,
Ci.nsIDOMGlobalPropertyInitializer,
Ci.nsIObserver,
Ci.nsIMessageListener,
Ci.nsISupportsWeakReference]),
};
this.NSGetFactory = XPCOMUtils.generateNSGetFactory([KillSwitch]);