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      1 /*
      2  * Copyright (C) 2007 Apple 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  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     14  *     its contributors may be used to endorse or promote products derived
     15  *     from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #ifndef AnimationController_h
     30 #define AnimationController_h
     31 
     32 #include "CSSPropertyNames.h"
     33 #include "wtf/Forward.h"
     34 #include "wtf/OwnPtr.h"
     35 
     36 namespace WebCore {
     37 
     38 class AnimationBase;
     39 class AnimationControllerPrivate;
     40 class Document;
     41 class Element;
     42 class Frame;
     43 class Node;
     44 class RenderObject;
     45 class RenderStyle;
     46 
     47 class AnimationController {
     48 public:
     49     AnimationController(Frame*);
     50     ~AnimationController();
     51 
     52     void cancelAnimations(RenderObject*);
     53     PassRefPtr<RenderStyle> updateAnimations(RenderObject*, RenderStyle* newStyle);
     54     PassRefPtr<RenderStyle> getAnimatedStyleForRenderer(RenderObject*);
     55 
     56     // This is called when an accelerated animation or transition has actually started to animate.
     57     void notifyAnimationStarted(RenderObject*, double startTime);
     58 
     59     void pauseAnimationsForTesting(double t);
     60     unsigned numberOfActiveAnimations(Document*) const; // To be used only for testing
     61 
     62     bool isRunningAnimationOnRenderer(RenderObject*, CSSPropertyID, bool isRunningNow = true) const;
     63     bool isRunningAcceleratableAnimationOnRenderer(RenderObject*) const;
     64     bool isRunningAcceleratedAnimationOnRenderer(RenderObject*, CSSPropertyID, bool isRunningNow = true) const;
     65 
     66     void suspendAnimations();
     67     void resumeAnimations();
     68     void serviceAnimations();
     69 
     70     void suspendAnimationsForDocument(Document*);
     71     void resumeAnimationsForDocument(Document*);
     72 
     73     void beginAnimationUpdate();
     74     void endAnimationUpdate();
     75 
     76     static bool supportsAcceleratedAnimationOfProperty(CSSPropertyID);
     77 
     78 private:
     79     OwnPtr<AnimationControllerPrivate> m_data;
     80     int m_beginAnimationUpdateCount;
     81 };
     82 
     83 class AnimationUpdateBlock {
     84 public:
     85     AnimationUpdateBlock(AnimationController* animationController)
     86         : m_animationController(animationController)
     87     {
     88         if (m_animationController)
     89             m_animationController->beginAnimationUpdate();
     90     }
     91 
     92     ~AnimationUpdateBlock()
     93     {
     94         if (m_animationController)
     95             m_animationController->endAnimationUpdate();
     96     }
     97 
     98     AnimationController* m_animationController;
     99 };
    100 
    101 } // namespace WebCore
    102 
    103 #endif // AnimationController_h
    104