1 /*
2  * Copyright (C) 2011 Google Inc. All Rights Reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  * 1. Redistributions of source code must retain the above copyright
8  *    notice, this list of conditions and the following disclaimer.
9  * 2. Redistributions in binary form must reproduce the above copyright
10  *    notice, this list of conditions and the following disclaimer in the
11  *    documentation and/or other materials provided with the distribution.
12  *
13  *  THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
14  *  EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
15  *  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16  *  DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
17  *  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18  *  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19  *  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
20  *  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
22  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23  *
24  */
25 
26 #ifndef ScriptedAnimationController_h
27 #define ScriptedAnimationController_h
28 
29 #if ENABLE(REQUEST_ANIMATION_FRAME)
30 #include "DOMTimeStamp.h"
31 #include <wtf/Noncopyable.h>
32 #include <wtf/PassOwnPtr.h>
33 #include <wtf/RefPtr.h>
34 #include <wtf/Vector.h>
35 
36 namespace WebCore {
37 
38 class Document;
39 class Element;
40 class RequestAnimationFrameCallback;
41 
42 class ScriptedAnimationController {
43 WTF_MAKE_NONCOPYABLE(ScriptedAnimationController);
44 public:
create(Document * document)45     static PassOwnPtr<ScriptedAnimationController> create(Document* document)
46     {
47         return adoptPtr(new ScriptedAnimationController(document));
48     }
49 
50     typedef int CallbackId;
51 
52     CallbackId registerCallback(PassRefPtr<RequestAnimationFrameCallback>, Element*);
53     void cancelCallback(CallbackId);
54     void serviceScriptedAnimations(DOMTimeStamp);
55 
56     void suspend();
57     void resume();
58 
59 private:
60     explicit ScriptedAnimationController(Document*);
61     typedef Vector<RefPtr<RequestAnimationFrameCallback> > CallbackList;
62     CallbackList m_callbacks;
63 
64     Document* m_document;
65     CallbackId m_nextCallbackId;
66     int m_suspendCount;
67 };
68 
69 }
70 
71 #endif // ENABLE(REQUEST_ANIMATION_FRAME)
72 
73 #endif // ScriptedAnimationController_h
74 
75