It is time.

ui/compositor/layer_animation_observer.h

-// Copyright (c) 2012 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 UI_COMPOSITOR_LAYER_ANIMATION_OBSERVER_H_
-#define UI_COMPOSITOR_LAYER_ANIMATION_OBSERVER_H_
-
-#include <map>
-#include <set>
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "ui/compositor/compositor_export.h"
-#include "ui/compositor/layer_animation_element.h"
-
-namespace ui {
-
-class LayerAnimationSequence;
-class ScopedLayerAnimationSettings;
-class ImplicitAnimationObserver;
-
-// LayerAnimationObservers are notified when animations complete.
-class COMPOSITOR_EXPORT LayerAnimationObserver  {
- public:
-  // Called when the |sequence| ends. Not called if |sequence| is aborted.
-  virtual void OnLayerAnimationEnded(
-      LayerAnimationSequence* sequence) = 0;
-
-  // Called if |sequence| is aborted for any reason. Should never do anything
-  // that may cause another animation to be started.
-  virtual void OnLayerAnimationAborted(
-      LayerAnimationSequence* sequence) = 0;
-
-  // Called when the animation is scheduled.
-  virtual void OnLayerAnimationScheduled(
-      LayerAnimationSequence* sequence) = 0;
-
- protected:
-  typedef std::set<LayerAnimationSequence*> AttachedSequences;
-
-  LayerAnimationObserver();
-  virtual ~LayerAnimationObserver();
-
-  // If the animator is destroyed during an animation, the animations are
-  // aborted. The resulting NotifyAborted notifications will NOT be sent to
-  // this observer if this function returns false. NOTE: IF YOU override THIS
-  // FUNCTION TO RETURN TRUE, YOU MUST REMEMBER TO REMOVE YOURSELF AS AN
-  // OBSERVER WHEN YOU ARE DESTROYED.
-  virtual bool RequiresNotificationWhenAnimatorDestroyed() const;
-
-  // Called when |this| is added to |sequence|'s observer list.
-  virtual void OnAttachedToSequence(LayerAnimationSequence* sequence);
-
-  // Called when |this| is removed to |sequence|'s observer list.
-  virtual void OnDetachedFromSequence(LayerAnimationSequence* sequence);
-
-  // Detaches this observer from all sequences it is currently observing.
-  void StopObserving();
-
-  const AttachedSequences& attached_sequences() const {
-    return attached_sequences_;
-  }
-
- private:
-  friend class LayerAnimationSequence;
-
-  // Called when |this| is added to |sequence|'s observer list.
-  void AttachedToSequence(LayerAnimationSequence* sequence);
-
-  // Called when |this| is removed to |sequence|'s observer list.
-  // This will only result in notifications if |send_notification| is true.
-  void DetachedFromSequence(LayerAnimationSequence* sequence,
-                            bool send_notification);
-
-  AttachedSequences attached_sequences_;
-};
-
-// An implicit animation observer is intended to be used in conjunction with a
-// ScopedLayerAnimationSettings object in order to receive a notification when
-// all implicit animations complete.
-class COMPOSITOR_EXPORT ImplicitAnimationObserver
-    : public LayerAnimationObserver {
- public:
-  ImplicitAnimationObserver();
-  ~ImplicitAnimationObserver() override;
-
-  // Called when the first animation sequence has started.
-  virtual void OnImplicitAnimationsScheduled() {}
-
-  virtual void OnImplicitAnimationsCompleted() = 0;
-
- protected:
-  // Deactivates the observer and clears the collection of animations it is
-  // waiting for.
-  void StopObservingImplicitAnimations();
-
-  // Returns whether animation for |property| was aborted.
-  // Note that if the property wasn't animated, then it couldn't have been
-  // aborted, so this will return false for that property.
-  bool WasAnimationAbortedForProperty(
-      LayerAnimationElement::AnimatableProperty property) const;
-
-  // Returns whether animation for |property| was completed successfully.
-  // Note that if the property wasn't animated, then it couldn't have been
-  // completed, so this will return false for that property.
-  bool WasAnimationCompletedForProperty(
-      LayerAnimationElement::AnimatableProperty property) const;
-
- private:
-  enum AnimationStatus {
-    ANIMATION_STATUS_UNKNOWN,
-    ANIMATION_STATUS_COMPLETED,
-    ANIMATION_STATUS_ABORTED,
-  };
-
-  friend class ScopedLayerAnimationSettings;
-
-  // LayerAnimationObserver implementation
-  void OnLayerAnimationEnded(LayerAnimationSequence* sequence) override;
-  void OnLayerAnimationAborted(LayerAnimationSequence* sequence) override;
-  void OnLayerAnimationScheduled(LayerAnimationSequence* sequence) override;
-  void OnAttachedToSequence(LayerAnimationSequence* sequence) override;
-  void OnDetachedFromSequence(LayerAnimationSequence* sequence) override;
-
-  // OnImplicitAnimationsCompleted is not fired unless the observer is active.
-  bool active() const { return active_; }
-  void SetActive(bool active);
-
-  void CheckCompleted();
-
-  void UpdatePropertyAnimationStatus(LayerAnimationSequence* sequence,
-                                     AnimationStatus status);
-  AnimationStatus AnimationStatusForProperty(
-      LayerAnimationElement::AnimatableProperty property) const;
-
-  bool active_;
-
-  // Set to true in the destructor (if non-NULL). Used to detect deletion while
-  // calling out.
-  bool* destroyed_;
-
-  typedef std::map<LayerAnimationElement::AnimatableProperty,
-                   AnimationStatus> PropertyAnimationStatusMap;
-  PropertyAnimationStatusMap property_animation_status_;
-
-  // True if OnLayerAnimationScheduled() has been called at least once.
-  bool first_sequence_scheduled_;
-};
-
-}  // namespace ui
-
-#endif  // UI_COMPOSITOR_LAYER_ANIMATION_OBSERVER_H_