gecko/dom/requestsync/RequestSyncScheduler.js

102 lines
3.0 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';
function debug(s) {
//dump('DEBUG RequestSyncScheduler: ' + s + '\n');
}
const {classes: Cc, interfaces: Ci, utils: Cu, results: Cr} = Components;
Cu.import('resource://gre/modules/DOMRequestHelper.jsm');
Cu.import('resource://gre/modules/XPCOMUtils.jsm');
XPCOMUtils.defineLazyServiceGetter(this, 'cpmm',
'@mozilla.org/childprocessmessagemanager;1',
'nsIMessageSender');
function RequestSyncScheduler() {
debug('created');
}
RequestSyncScheduler.prototype = {
__proto__: DOMRequestIpcHelper.prototype,
classDescription: 'RequestSyncScheduler XPCOM Component',
classID: Components.ID('{8ee5ab74-15c4-478f-9d32-67627b9f0f1a}'),
contractID: '@mozilla.org/dom/request-sync-scheduler;1',
QueryInterface: XPCOMUtils.generateQI([Ci.nsISupportsWeakReference,
Ci.nsIObserver,
Ci.nsIDOMGlobalPropertyInitializer]),
_messages: [ 'RequestSync:Register:Return',
'RequestSync:Unregister:Return',
'RequestSync:Registrations:Return',
'RequestSync:Registration:Return' ],
init: function(aWindow) {
debug('init');
// DOMRequestIpcHelper.initHelper sets this._window
this.initDOMRequestHelper(aWindow, this._messages);
},
register: function(aTask, aParams) {
debug('register');
return this.sendMessage('RequestSync:Register',
{ task: aTask, params: aParams });
},
unregister: function(aTask) {
debug('unregister');
return this.sendMessage('RequestSync:Unregister',
{ task: aTask });
},
registrations: function() {
debug('registrations');
return this.sendMessage('RequestSync:Registrations', {});
},
registration: function(aTask) {
debug('registration');
return this.sendMessage('RequestSync:Registration',
{ task: aTask });
},
sendMessage: function(aMsg, aObj) {
let self = this;
return this.createPromise(function(aResolve, aReject) {
aObj.requestID =
self.getPromiseResolverId({ resolve: aResolve, reject: aReject });
cpmm.sendAsyncMessage(aMsg, aObj, null,
self._window.document.nodePrincipal);
});
},
receiveMessage: function(aMessage) {
debug('receiveMessage');
let req = this.getPromiseResolver(aMessage.data.requestID);
if (!req) {
return;
}
if ('error' in aMessage.data) {
req.reject(Cu.cloneInto(aMessage.data.error, this._window));
return;
}
if ('results' in aMessage.data) {
req.resolve(Cu.cloneInto(aMessage.data.results, this._window));
return;
}
req.resolve();
}
};
this.NSGetFactory = XPCOMUtils.generateNSGetFactory([RequestSyncScheduler]);