root/Source/core/animation/ActiveAnimations.h

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#ifndef ActiveAnimations_h
#define ActiveAnimations_h

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

namespace WebCore {

class CSSAnimations;
class RenderObject;
class Element;

// FIXME: Move these to CompositorAnimations
bool shouldCompositeForActiveAnimations(const RenderObject&);
bool hasActiveAnimations(const RenderObject&, CSSPropertyID);
bool hasActiveAnimationsOnCompositor(const RenderObject&, CSSPropertyID);

class ActiveAnimations : public NoBaseWillBeGarbageCollectedFinalized<ActiveAnimations> {
public:
    ActiveAnimations()
        : m_animationStyleChange(false)
    {
    }

    // 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& defaultStack() { return m_defaultStack; }
    // Tracks the state of active CSS Animations and Transitions. The individual animations
    // will also be part of the default stack, but the mapping betwen animation name and
    // player is kept here.
    CSSAnimations& cssAnimations() { return m_cssAnimations; }
    const CSSAnimations& cssAnimations() const { return m_cssAnimations; }

    typedef HashCountedSet<AnimationPlayer*> AnimationPlayerSet;
    // AnimationPlayers which have animations targeting this element.
    const AnimationPlayerSet& players() const { return m_players; }
    AnimationPlayerSet& players() { return m_players; }

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

    // FIXME: This and most of this class needs to be renamed to consider 'current'
    // rather than 'active' animations.
    bool hasActiveAnimations(CSSPropertyID) const;
    bool hasActiveAnimationsOnCompositor(CSSPropertyID) const;
    void cancelAnimationOnCompositor();

    void setAnimationStyleChange(bool animationStyleChange) { m_animationStyleChange = animationStyleChange; }

    void trace(Visitor*);

private:
    bool isAnimationStyleChange() const { return m_animationStyleChange; }

    AnimationStack m_defaultStack;
    CSSAnimations m_cssAnimations;
    AnimationPlayerSet m_players;
    bool m_animationStyleChange;

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

} // namespace WebCore

#endif

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