1 : /* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is Web Workers.
16 : *
17 : * The Initial Developer of the Original Code is
18 : * The Mozilla Foundation.
19 : * Portions created by the Initial Developer are Copyright (C) 2011
20 : * the Initial Developer. All Rights Reserved.
21 : *
22 : * Contributor(s):
23 : * Ben Turner <bent.mozilla@gmail.com> (Original Author)
24 : *
25 : * Alternatively, the contents of this file may be used under the terms of
26 : * either the GNU General Public License Version 2 or later (the "GPL"), or
27 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
28 : * in which case the provisions of the GPL or the LGPL are applicable instead
29 : * of those above. If you wish to allow use of your version of this file only
30 : * under the terms of either the GPL or the LGPL, and not to allow others to
31 : * use your version of this file under the terms of the MPL, indicate your
32 : * decision by deleting the provisions above and replace them with the notice
33 : * and other provisions required by the GPL or the LGPL. If you do not delete
34 : * the provisions above, a recipient may use your version of this file under
35 : * the terms of any one of the MPL, the GPL or the LGPL.
36 : *
37 : * ***** END LICENSE BLOCK ***** */
38 :
39 : #ifndef mozilla_dom_workers_listenermanager_h__
40 : #define mozilla_dom_workers_listenermanager_h__
41 :
42 : #include "Workers.h"
43 :
44 : #include "jsapi.h"
45 : #include "prclist.h"
46 :
47 : BEGIN_WORKERS_NAMESPACE
48 :
49 : namespace events {
50 :
51 : // XXX Current impl doesn't divide into phases.
52 : // XXX Current impl doesn't handle event target chains.
53 : class ListenerManager
54 : {
55 : public:
56 : enum Phase
57 : {
58 : All = 0,
59 : Capturing,
60 : Onfoo,
61 : Bubbling
62 : };
63 :
64 : private:
65 : PRCList mCollectionHead;
66 :
67 : public:
68 0 : ListenerManager()
69 : {
70 0 : PR_INIT_CLIST(&mCollectionHead);
71 0 : }
72 :
73 : #ifdef DEBUG
74 : ~ListenerManager();
75 : #endif
76 :
77 : void
78 0 : Trace(JSTracer* aTrc)
79 : {
80 0 : if (!PR_CLIST_IS_EMPTY(&mCollectionHead)) {
81 0 : TraceInternal(aTrc);
82 : }
83 0 : }
84 :
85 : void
86 0 : Finalize(JSContext* aCx)
87 : {
88 0 : if (!PR_CLIST_IS_EMPTY(&mCollectionHead)) {
89 0 : FinalizeInternal(aCx);
90 : }
91 0 : }
92 :
93 : bool
94 0 : AddEventListener(JSContext* aCx, JSString* aType, jsval aListener,
95 : bool aCapturing, bool aWantsUntrusted)
96 : {
97 : return Add(aCx, aType, aListener, aCapturing ? Capturing : Bubbling,
98 0 : aWantsUntrusted);
99 : }
100 :
101 : bool
102 : SetEventListener(JSContext* aCx, JSString* aType, jsval aListener);
103 :
104 : bool
105 0 : RemoveEventListener(JSContext* aCx, JSString* aType, jsval aListener,
106 : bool aCapturing)
107 : {
108 0 : if (PR_CLIST_IS_EMPTY(&mCollectionHead)) {
109 0 : return true;
110 : }
111 : return Remove(aCx, aType, aListener, aCapturing ? Capturing : Bubbling,
112 0 : true);
113 : }
114 :
115 : bool
116 : GetEventListener(JSContext* aCx, JSString* aType, jsval* aListener);
117 :
118 : bool
119 : DispatchEvent(JSContext* aCx, JSObject* aTarget, JSObject* aEvent,
120 : bool* aPreventDefaultCalled);
121 :
122 : bool
123 0 : HasListeners()
124 : {
125 0 : return !PR_CLIST_IS_EMPTY(&mCollectionHead);
126 : }
127 :
128 : bool
129 : HasListenersForType(JSContext* aCx, JSString* aType)
130 : {
131 : return HasListeners() && HasListenersForTypeInternal(aCx, aType);
132 : }
133 :
134 : bool
135 : HasListenersForTypeInternal(JSContext* aCx, JSString* aType);
136 :
137 : private:
138 : void
139 : TraceInternal(JSTracer* aTrc);
140 :
141 : void
142 : FinalizeInternal(JSContext* aCx);
143 :
144 : bool
145 : Add(JSContext* aCx, JSString* aType, jsval aListener, Phase aPhase,
146 : bool aWantsUntrusted);
147 :
148 : bool
149 : Remove(JSContext* aCx, JSString* aType, jsval aListener, Phase aPhase,
150 : bool aClearEmpty);
151 : };
152 :
153 : } // namespace events
154 :
155 : END_WORKERS_NAMESPACE
156 :
157 : #endif /* mozilla_dom_workers_listenermanager_h__ */
|