/*

 * Copyright (C) 2007 Apple Inc. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1.  Redistributions of source code must retain the above copyright

 *     notice, this list of conditions and the following disclaimer. 

 * 2.  Redistributions in binary form must reproduce the above copyright

 *     notice, this list of conditions and the following disclaimer in the

 *     documentation and/or other materials provided with the distribution. 

 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of

 *     its contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission. 

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY

 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#ifndef ImplicitAnimation_h

#define ImplicitAnimation_h

#include "AnimationBase.h"

#include "Document.h"

namespace WebCore {

// An ImplicitAnimation tracks the state of a transition of a specific CSS property

// for a single RenderObject.

class ImplicitAnimation : public AnimationBase {

public:

    static PassRefPtr<ImplicitAnimation> create(const Animation* animation, int animatingProperty, RenderObject* renderer, CompositeAnimation* compositeAnimation, RenderStyle* fromStyle)

    {

        return adoptRef(new ImplicitAnimation(animation, animatingProperty, renderer, compositeAnimation, fromStyle));

    };

    int transitionProperty() const { return m_transitionProperty; }

    int animatingProperty() const { return m_animatingProperty; }

    virtual void onAnimationEnd(double elapsedTime);

    virtual bool startAnimation(double timeOffset);

    virtual void pauseAnimation(double /*timeOffset*/) { }

    virtual void endAnimation();

    virtual void animate(CompositeAnimation*, RenderObject*, const RenderStyle* currentStyle, RenderStyle* targetStyle, RefPtr<RenderStyle>& animatedStyle);

    virtual void getAnimatedStyle(RefPtr<RenderStyle>& animatedStyle);

    virtual void reset(RenderStyle* to);

    void setOverridden(bool);

    virtual bool overridden() const { return m_overridden; }

    virtual bool affectsProperty(int) const;

    bool hasStyle() const { return m_fromStyle && m_toStyle; }

    bool isTargetPropertyEqual(int, const RenderStyle* targetStyle);

    void blendPropertyValueInStyle(int, RenderStyle* currentStyle);

    virtual double timeToNextService();

    bool active() const { return m_active; }

    void setActive(bool b) { m_active = b; }

protected:

    bool shouldSendEventForListener(Document::ListenerType) const;    

    bool sendTransitionEvent(const AtomicString&, double elapsedTime);

    void validateTransformFunctionList();

private:

    ImplicitAnimation(const Animation*, int animatingProperty, RenderObject*, CompositeAnimation*, RenderStyle* fromStyle);    

    virtual ~ImplicitAnimation();

    int m_transitionProperty;   // Transition property as specified in the RenderStyle. May be cAnimateAll

    int m_animatingProperty;    // Specific property for this ImplicitAnimation

    bool m_overridden;          // true when there is a keyframe animation that overrides the transitioning property

    bool m_active;              // used for culling the list of transitions

    // The two styles that we are blending.

    RefPtr<RenderStyle> m_fromStyle;

    RefPtr<RenderStyle> m_toStyle;

};

} // namespace WebCore

#endif // ImplicitAnimation_h