third_party/WebKit/Source/platform/animation/CompositorAnimationPlayer.h

// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CompositorAnimationPlayer_h
#define CompositorAnimationPlayer_h

#include "base/memory/ref_counted.h"
#include "cc/animation/animation_delegate.h"
#include "cc/animation/animation_player.h"
#include "platform/PlatformExport.h"
#include "platform/graphics/CompositorElementId.h"
#include "wtf/Noncopyable.h"
#include "wtf/PtrUtil.h"
#include <memory>

namespace cc {
class AnimationCurve;
}

namespace blink {

class CompositorAnimation;
class CompositorAnimationDelegate;

// A compositor representation for AnimationPlayer.
class PLATFORM_EXPORT CompositorAnimationPlayer : public cc::AnimationDelegate {
  WTF_MAKE_NONCOPYABLE(CompositorAnimationPlayer);

 public:
  static std::unique_ptr<CompositorAnimationPlayer> create() {
    return wrapUnique(new CompositorAnimationPlayer());
  }

  ~CompositorAnimationPlayer();

  cc::AnimationPlayer* ccAnimationPlayer() const;

  // An animation delegate is notified when animations are started and stopped.
  // The CompositorAnimationPlayer does not take ownership of the delegate, and
  // it is the responsibility of the client to reset the layer's delegate before
  // deleting the delegate.
  void setAnimationDelegate(CompositorAnimationDelegate*);

  void attachElement(const CompositorElementId&);
  void detachElement();
  bool isElementAttached() const;

  void addAnimation(std::unique_ptr<CompositorAnimation>);
  void removeAnimation(int animationId);
  void pauseAnimation(int animationId, double timeOffset);
  void abortAnimation(int animationId);

 private:
  CompositorAnimationPlayer();

  // cc::AnimationDelegate implementation.
  void NotifyAnimationStarted(base::TimeTicks monotonicTime,
                              cc::TargetProperty::Type,
                              int group) override;
  void NotifyAnimationFinished(base::TimeTicks monotonicTime,
                               cc::TargetProperty::Type,
                               int group) override;
  void NotifyAnimationAborted(base::TimeTicks monotonicTime,
                              cc::TargetProperty::Type,
                              int group) override;
  void NotifyAnimationTakeover(base::TimeTicks monotonicTime,
                               cc::TargetProperty::Type,
                               double animationStartTime,
                               std::unique_ptr<cc::AnimationCurve>) override;

  scoped_refptr<cc::AnimationPlayer> m_animationPlayer;
  CompositorAnimationDelegate* m_delegate;
};

}  // namespace blink

#endif  // CompositorAnimationPlayer_h