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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 KeyframeAnimation_h
     30 #define KeyframeAnimation_h
     31 
     32 #include "AnimationBase.h"
     33 #include "Document.h"
     34 #include "KeyframeList.h"
     35 
     36 namespace WebCore {
     37 
     38 class RenderStyle;
     39 
     40 // A KeyframeAnimation tracks the state of an explicit animation
     41 // for a single RenderObject.
     42 class KeyframeAnimation : public AnimationBase {
     43 public:
     44     static PassRefPtr<KeyframeAnimation> create(const Animation* animation, RenderObject* renderer, int index, CompositeAnimation* compositeAnimation, RenderStyle* unanimatedStyle)
     45     {
     46         return adoptRef(new KeyframeAnimation(animation, renderer, index, compositeAnimation, unanimatedStyle));
     47     };
     48 
     49     virtual void animate(CompositeAnimation*, RenderObject*, const RenderStyle* currentStyle, RenderStyle* targetStyle, RefPtr<RenderStyle>& animatedStyle);
     50     virtual void getAnimatedStyle(RefPtr<RenderStyle>& animatedStyle);
     51 
     52     const AtomicString& name() const { return m_keyframes.animationName(); }
     53     int index() const { return m_index; }
     54     void setIndex(int i) { m_index = i; }
     55 
     56     bool hasAnimationForProperty(int property) const;
     57 
     58     void setUnanimatedStyle(PassRefPtr<RenderStyle> style) { m_unanimatedStyle = style; }
     59     RenderStyle* unanimatedStyle() const { return m_unanimatedStyle.get(); }
     60 
     61     virtual double timeToNextService();
     62 
     63 protected:
     64     virtual void onAnimationStart(double elapsedTime);
     65     virtual void onAnimationIteration(double elapsedTime);
     66     virtual void onAnimationEnd(double elapsedTime);
     67     virtual bool startAnimation(double timeOffset);
     68     virtual void pauseAnimation(double timeOffset);
     69     virtual void endAnimation();
     70 
     71     virtual void overrideAnimations();
     72     virtual void resumeOverriddenAnimations();
     73 
     74     bool shouldSendEventForListener(Document::ListenerType inListenerType) const;
     75     bool sendAnimationEvent(const AtomicString&, double elapsedTime);
     76 
     77     virtual bool affectsProperty(int) const;
     78 
     79     void validateTransformFunctionList();
     80 
     81 private:
     82     KeyframeAnimation(const Animation* animation, RenderObject*, int index, CompositeAnimation*, RenderStyle* unanimatedStyle);
     83     virtual ~KeyframeAnimation();
     84 
     85     // Get the styles for the given property surrounding the current animation time and the progress between them.
     86     void fetchIntervalEndpointsForProperty(int property, const RenderStyle*& fromStyle, const RenderStyle*& toStyle, double& progress) const;
     87 
     88     // The keyframes that we are blending.
     89     KeyframeList m_keyframes;
     90 
     91     // The order in which this animation appears in the animation-name style.
     92     int m_index;
     93     bool m_startEventDispatched;
     94 
     95     // The style just before we started animation
     96     RefPtr<RenderStyle> m_unanimatedStyle;
     97 };
     98 
     99 } // namespace WebCore
    100 
    101 #endif // KeyframeAnimation_h
    102