Implement new AnimationTimeline superclass

third_party/WebKit/Source/core/animation/AnimationTimeline.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef AnimationTimeline_h
 #define AnimationTimeline_h
 
 #include <memory>
 #include "core/CoreExport.h"
-#include "core/animation/Animation.h"
+#include "core/animation/AnimationEffectReadOnly.h"
 #include "core/animation/EffectModel.h"
+#include "core/animation/SuperAnimationTimeline.h"
 #include "core/dom/Element.h"
 #include "core/dom/TaskRunnerHelper.h"
 #include "platform/Timer.h"
 #include "platform/animation/CompositorAnimationTimeline.h"
 #include "platform/bindings/ScriptWrappable.h"
 #include "platform/heap/Handle.h"
 #include "platform/wtf/RefPtr.h"
 #include "platform/wtf/Vector.h"
 
 namespace blink {
 
+class Animation;
+class AnimationEffectReadOnly;
 class Document;
-class AnimationEffectReadOnly;
 
 // AnimationTimeline is constructed and owned by Document, and tied to its
 // lifecycle.
-class CORE_EXPORT AnimationTimeline
-    : public GarbageCollectedFinalized<AnimationTimeline>,
-      public ScriptWrappable {
+class CORE_EXPORT AnimationTimeline : public SuperAnimationTimeline {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   class PlatformTiming : public GarbageCollectedFinalized<PlatformTiming> {
    public:
     // Calls AnimationTimeline's wake() method after duration seconds.
     virtual void WakeAfter(double duration) = 0;
     virtual void ServiceOnNextFrame() = 0;
     virtual ~PlatformTiming() {}
     DEFINE_INLINE_VIRTUAL_TRACE() {}
   };
 
   static AnimationTimeline* Create(Document*, PlatformTiming* = nullptr);
 
   virtual ~AnimationTimeline() {}
 
+  bool IsAnimationTimeline() const final { return true; }
+
   void ServiceAnimations(TimingUpdateReason);
   void ScheduleNextService();
 
   Animation* Play(AnimationEffectReadOnly*);
   HeapVector<Member<Animation>> getAnimations();
 
   void AnimationAttached(Animation&);
 
   bool IsActive();
   bool HasPendingUpdates() const {
     return !animations_needing_update_.IsEmpty();
   }
   double ZeroTime();
-  double currentTime(bool& is_null);
+  double currentTime(bool& is_null) override;
   double currentTime();
   double CurrentTimeInternal(bool& is_null);
   double CurrentTimeInternal();
   double EffectiveTime();
   void PauseAnimationsForTesting(double);
 
   void SetAllCompositorPending(bool source_changed = false);
   void SetOutdatedAnimation(Animation*);
   void ClearOutdatedAnimation(Animation*);
   bool HasOutdatedAnimation() const { return outdated_animation_count_ > 0; }
   bool NeedsAnimationTimingUpdate();
   void InvalidateKeyframeEffects(const TreeScope&);
 
   void SetPlaybackRate(double);
   double PlaybackRate() const;
 
   CompositorAnimationTimeline* CompositorTimeline() const {
     return compositor_timeline_.get();
   }
 
   Document* GetDocument() { return document_.Get(); }
   void Wake();
   void ResetForTesting();
 
-  DECLARE_TRACE();
+  DECLARE_VIRTUAL_TRACE();
 
  protected:
   AnimationTimeline(Document*, PlatformTiming*);
 
  private:
   Member<Document> document_;
   double zero_time_;
   bool zero_time_initialized_;
   unsigned outdated_animation_count_;
   // Animations which will be updated on the next frame
@@ skipping 30 matching lines @@
     DECLARE_VIRTUAL_TRACE();
 
    private:
     Member<AnimationTimeline> timeline_;
     TaskRunnerTimer<AnimationTimelineTiming> timer_;
   };
 
   friend class AnimationAnimationTimelineTest;
 };
 
+DEFINE_TYPE_CASTS(AnimationTimeline,
+                  SuperAnimationTimeline,
+                  timeline,
+                  timeline->IsAnimationTimeline(),
+                  timeline.IsAnimationTimeline());
+
 }  // namespace blink
 
 #endif