content/base/src/messageWakeupService.js@6474c204b198
content/base/src/messageWakeupService.js
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
1 /* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this
3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5 Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
7 const Cc = Components.classes;
8 const Ci = Components.interfaces;
10 const CATEGORY_WAKEUP_REQUEST = "wakeup-request";
12 function MessageWakeupService() { };
14 MessageWakeupService.prototype =
15 {
16 classID: Components.ID("{f9798742-4f7b-4188-86ba-48b116412b29}"),
17 QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver]),
19 messagesData: [],
21 get messageManager() {
22 if (!this._messageManager)
23 this._messageManager = Cc["@mozilla.org/parentprocessmessagemanager;1"].
24 getService(Ci.nsIMessageListenerManager);
25 return this._messageManager;
26 },
28 requestWakeup: function(aMessageName, aCid, aIid, aMethod) {
29 this.messagesData[aMessageName] = {
30 cid: aCid,
31 iid: aIid,
32 method: aMethod,
33 };
35 this.messageManager.addMessageListener(aMessageName, this);
36 },
38 receiveMessage: function(aMessage) {
39 let data = this.messagesData[aMessage.name];
40 // TODO: When bug 593407 is ready, stop doing the wrappedJSObject hack
41 // and use this line instead:
42 // QueryInterface(Ci.nsIMessageListener);
43 let service = Cc[data.cid][data.method](Ci[data.iid]).
44 wrappedJSObject;
46 // The receiveMessage() call itself may spin an event loop, and we
47 // do not want to swap listeners in that - it would cause the current
48 // message to be answered by two listeners. So, we call that first,
49 // then queue the swap for the next event loop
50 let ret = service.receiveMessage(aMessage);
52 if (data.timer) {
53 // Handle the case of two such messages happening in quick succession
54 data.timer.cancel();
55 data.timer = null;
56 }
58 data.timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
59 let self = this;
60 data.timer.initWithCallback(function() {
61 self.messageManager.addMessageListener(aMessage.name, service);
62 self.messageManager.removeMessageListener(aMessage.name, self);
63 delete self.messagesData[aMessage.name];
64 }, 0, Ci.nsITimer.TYPE_ONE_SHOT);
66 return ret;
67 },
69 observe: function TM_observe(aSubject, aTopic, aData) {
70 switch (aTopic) {
71 case "profile-after-change":
72 {
73 var catMan = Cc["@mozilla.org/categorymanager;1"].
74 getService(Ci.nsICategoryManager);
75 var entries = catMan.enumerateCategory(CATEGORY_WAKEUP_REQUEST);
76 while (entries.hasMoreElements()) {
77 var entry = entries.getNext().QueryInterface(Ci.nsISupportsCString).data;
78 var value = catMan.getCategoryEntry(CATEGORY_WAKEUP_REQUEST, entry);
79 var parts = value.split(",");
80 var cid = parts[0];
81 var iid = parts[1];
82 var method = parts[2];
83 var messages = parts.slice(3);
84 messages.forEach(function(messageName) {
85 this.requestWakeup(messageName, cid, iid, method);
86 }, this);
87 }
88 }
89 break;
90 }
91 },
92 };
94 var components = [MessageWakeupService];
95 this.NSGetFactory = XPCOMUtils.generateNSGetFactory(components);
