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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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#ifndef SKY_ENGINE_CORE_ANIMATION_PENDINGANIMATIONS_H_
#define SKY_ENGINE_CORE_ANIMATION_PENDINGANIMATIONS_H_

#include "sky/engine/core/animation/AnimationPlayer.h"
#include "sky/engine/platform/Timer.h"
#include "sky/engine/platform/heap/Handle.h"
#include "sky/engine/wtf/Vector.h"

namespace blink {

// Manages the starting of pending animations on the compositor following a
// compositing update.
// For CSS Animations, used to synchronize the start of main-thread animations
// with compositor animations when both classes of CSS Animations are triggered
// by the same recalc
class PendingAnimations final {
    DISALLOW_ALLOCATION();
public:

    PendingAnimations()
        : m_timer(this, &PendingAnimations::timerFired)
    { }

    void add(AnimationPlayer*);
    // Returns whether we are waiting for an animation to start and should
    // service again on the next frame.
    bool update();

private:
    void timerFired(Timer<PendingAnimations>*) { update(); }

    Vector<RefPtr<AnimationPlayer> > m_pending;
    Timer<PendingAnimations> m_timer;
};

} // namespace blink

#endif  // SKY_ENGINE_CORE_ANIMATION_PENDINGANIMATIONS_H_