/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef Animation_h
#define Animation_h

#include "core/animation/AnimationEffect.h"
#include "core/animation/TimedItem.h"
#include "wtf/RefPtr.h"

namespace WebCore {

class Element;

class Animation FINAL : public TimedItem {

public:
    enum Priority { DefaultPriority, TransitionPriority };

    static PassRefPtr<Animation> create(PassRefPtr<Element>, PassRefPtr<AnimationEffect>, const Timing&, Priority = DefaultPriority, PassOwnPtr<EventDelegate> = nullptr);
    virtual bool isAnimation() const OVERRIDE FINAL { return true; }

    const AnimationEffect::CompositableValueList* compositableValues() const
    {
        ASSERT(m_compositableValues);
        return m_compositableValues.get();
    }

    bool affects(CSSPropertyID) const;
    const AnimationEffect* effect() const { return m_effect.get(); }
    Priority priority() const { return m_priority; }
    Element* target() { return m_target.get(); }

    bool isCandidateForAnimationOnCompositor() const;
    // Must only be called once and assumes to be part of a player without a start time.
    bool maybeStartAnimationOnCompositor();
    bool hasActiveAnimationsOnCompositor() const;
    bool hasActiveAnimationsOnCompositor(CSSPropertyID) const;
    void cancelAnimationOnCompositor();
    void pauseAnimationForTestingOnCompositor(double pauseTime);

protected:
    // Returns whether style recalc was triggered.
    virtual bool applyEffects(bool previouslyInEffect);
    virtual void clearEffects();
    virtual bool updateChildrenAndEffects() const OVERRIDE FINAL;
    virtual void didAttach() OVERRIDE FINAL;
    virtual void willDetach() OVERRIDE FINAL;
    virtual double calculateTimeToEffectChange(double inheritedTime, double timeToNextIteration) const OVERRIDE FINAL;

private:
    Animation(PassRefPtr<Element>, PassRefPtr<AnimationEffect>, const Timing&, Priority, PassOwnPtr<EventDelegate>);

    RefPtr<Element> m_target;
    RefPtr<AnimationEffect> m_effect;

    bool m_activeInAnimationStack;
    OwnPtr<AnimationEffect::CompositableValueList> m_compositableValues;

    Priority m_priority;

    Vector<int> m_compositorAnimationIds;

    friend class CSSAnimations;
};

DEFINE_TYPE_CASTS(Animation, TimedItem, timedItem, timedItem->isAnimation(), timedItem.isAnimation());

} // namespace WebCore

#endif