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 * modification, are permitted provided that the following conditions are
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 *
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 * in the documentation and/or other materials provided with the
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 * this software without specific prior written permission.
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#ifndef ElementAnimations_h
#define ElementAnimations_h

#include "core/animation/AnimationStack.h"
#include "core/animation/CustomCompositorAnimations.h"
#include "core/animation/css/CSSAnimations.h"
#include "wtf/HashCountedSet.h"
#include "wtf/HashMap.h"
#include "wtf/RefPtr.h"
#include "wtf/Vector.h"

namespace blink {

class CSSAnimations;

using AnimationCountedSet = HeapHashCountedSet<WeakMember<Animation>>;

class ElementAnimations : public GarbageCollectedFinalized<ElementAnimations> {
    WTF_MAKE_NONCOPYABLE(ElementAnimations);
public:
    ElementAnimations();
    ~ElementAnimations();

    // Animations that are currently active for this element, their effects will be applied
    // during a style recalc. CSS Transitions are included in this stack.
    AnimationStack& animationStack() { return m_animationStack; }
    const AnimationStack& animationStack() const { return m_animationStack; }
    // Tracks long running animations that are responsible for applying mutations
    // from compositor worker.
    CustomCompositorAnimations& customCompositorAnimations() { return m_customCompositorAnimations; }
    const CustomCompositorAnimations& customCompositorAnimations() const { return m_customCompositorAnimations; }
    // Tracks the state of active CSS Animations and Transitions. The individual animations
    // will also be part of the animation stack, but the mapping betwen animation name and
    // animation is kept here.
    CSSAnimations& cssAnimations() { return m_cssAnimations; }
    const CSSAnimations& cssAnimations() const { return m_cssAnimations; }

    // Animations which have effects targeting this element.
    AnimationCountedSet& animations() { return m_animations; }

    bool isEmpty() const { return m_animationStack.isEmpty() && m_cssAnimations.isEmpty() && m_animations.isEmpty(); }

    void restartAnimationOnCompositor();

    void updateAnimationFlags(ComputedStyle&);
    void setAnimationStyleChange(bool animationStyleChange) { m_animationStyleChange = animationStyleChange; }

    const ComputedStyle* baseComputedStyle() const;
    void updateBaseComputedStyle(const ComputedStyle*);
    void clearBaseComputedStyle();

    DECLARE_TRACE();

private:
    bool isAnimationStyleChange() const;

    AnimationStack m_animationStack;
    CustomCompositorAnimations m_customCompositorAnimations;
    CSSAnimations m_cssAnimations;
    AnimationCountedSet m_animations;
    bool m_animationStyleChange;
    RefPtr<ComputedStyle> m_baseComputedStyle;

    // CSSAnimations and DeferredLegacyStyleInterpolation checks if a style change is due to animation.
    friend class CSSAnimations;
    friend class DeferredLegacyStyleInterpolation;
};

} // namespace blink

#endif // ElementAnimations_h