Use an auxiliary list of animation controllers.

cc/layer_animation_controller.h

 // Copyright 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 CC_LAYER_ANIMATION_CONTROLLER_H_
 #define CC_LAYER_ANIMATION_CONTROLLER_H_
 
 #include "base/basictypes.h"
 #include "base/hash_tables.h"
+#include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/time.h"
 #include "cc/animation_events.h"
 #include "cc/cc_export.h"
 #include "cc/scoped_ptr_vector.h"
+#include "ui/gfx/transform.h"
 
 namespace gfx {
 class Transform;
 }
 
 namespace cc {
 
 class Animation;
+class AnimationRegistrar;
 class KeyframeValueList;
 
-class CC_EXPORT LayerAnimationControllerClient {
+class CC_EXPORT LayerAnimationController
+    : public base::RefCounted<LayerAnimationController> {
 public:
-    virtual ~LayerAnimationControllerClient() { }
-
-    virtual int id() const = 0;
-    virtual void setOpacityFromAnimation(float) = 0;
-    virtual float opacity() const = 0;
-    virtual void setTransformFromAnimation(const gfx::Transform&) = 0;
-    virtual const gfx::Transform& transform() const = 0;
-};
-
-class CC_EXPORT LayerAnimationController {
-public:
-    static scoped_ptr<LayerAnimationController> create(LayerAnimationControllerClient*);
-
-    virtual ~LayerAnimationController();
+    static scoped_refptr<LayerAnimationController> create();
 
     // These methods are virtual for testing.
     virtual void addAnimation(scoped_ptr<ActiveAnimation>);
     virtual void pauseAnimation(int animationId, double timeOffset);
     virtual void removeAnimation(int animationId);
     virtual void removeAnimation(int animationId, ActiveAnimation::TargetProperty);
     virtual void suspendAnimations(double monotonicTime);
     virtual void resumeAnimations(double monotonicTime);
 
     // Ensures that the list of active animations on the main thread and the impl thread
@@ skipping 18 matching lines @@
     bool isAnimatingProperty(ActiveAnimation::TargetProperty) const;
 
     // This is called in response to an animation being started on the impl thread. This
     // function updates the corresponding main thread animation's start time.
     void notifyAnimationStarted(const AnimationEvent&);
 
     // If a sync is forced, then the next time animation updates are pushed to the impl
     // thread, all animations will be transferred.
     void setForceSync() { m_forceSync = true; }
 
-    void setClient(LayerAnimationControllerClient*);
+    void setAnimationRegistrar(AnimationRegistrar*);
+    void setId(int id);
+
+    // Gets the last animated opacity value.
+    float opacity() const { return m_opacity; }
+
+    // Returns the time at which opacity was updated.
+    base::TimeTicks opacityLastUpdateTime() const { return m_opacityLastUpdateTime; }
+
+    // Gets the last animate transform value.
+    const gfx::Transform& transform() const { return m_transform; }
+
+    // Returns the time at which the transform was updated.
+    base::TimeTicks transformLastUpdateTime() const { return m_transformLastUpdateTime; }
 
 protected:
-    explicit LayerAnimationController(LayerAnimationControllerClient*);
+    friend class base::RefCounted<LayerAnimationController>;
+
+    LayerAnimationController();
+    virtual ~LayerAnimationController();
 
 private:
     typedef base::hash_set<int> TargetProperties;
 
     void pushNewAnimationsToImplThread(LayerAnimationController*) const;
     void removeAnimationsCompletedOnMainThread(LayerAnimationController*) const;
     void pushPropertiesToImplThread(LayerAnimationController*) const;
     void replaceImplThreadAnimations(LayerAnimationController*) const;
 
     void startAnimationsWaitingForNextTick(double monotonicTime, AnimationEventsVector*);
     void startAnimationsWaitingForStartTime(double monotonicTime, AnimationEventsVector*);
     void startAnimationsWaitingForTargetAvailability(double monotonicTime, AnimationEventsVector*);
     void resolveConflicts(double monotonicTime);
     void markAnimationsForDeletion(double monotonicTime, AnimationEventsVector*);
     void purgeAnimationsMarkedForDeletion();
 
     void tickAnimations(double monotonicTime);
 
+    void updateRegistration();
+
     // If this is true, we force a sync to the impl thread.
     bool m_forceSync;
 
-    LayerAnimationControllerClient* m_client;
+    base::TimeTicks m_opacityLastUpdateTime;
+    base::TimeTicks m_transformLastUpdateTime;
+
+    float m_opacity;
+    gfx::Transform m_transform;
+
+    AnimationRegistrar* m_registrar;
+    int m_id;
     ScopedPtrVector<ActiveAnimation> m_activeAnimations;
 
     DISALLOW_COPY_AND_ASSIGN(LayerAnimationController);
 };
 
 } // namespace cc
 
 #endif  // CC_LAYER_ANIMATION_CONTROLLER_H_