Bug 1150810 part 10 - Add AnimationTimeline::GetAnimations; r=jwatt; r=smaug

This patch also removes the (commented-out) play() method from the
AnimationTimeline.webidl since it has been removed from the spec.

dom/animation/AnimationTimeline.cpp

@@ -19,6 +19,26 @@ NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(AnimationTimeline)
   NS_INTERFACE_MAP_ENTRY(nsISupports)
 NS_INTERFACE_MAP_END
 
+static PLDHashOperator
+AppendAnimationToSequence(nsRefPtrHashKey<dom::Animation>* aKey,
+                          void* aSequence)
+{
+  Animation* animation = aKey->GetKey();
+  AnimationTimeline::AnimationSequence* sequence =
+    static_cast<AnimationTimeline::AnimationSequence*>(aSequence);
+  sequence->AppendElement(animation);
+
+  return PL_DHASH_NEXT;
+}
+
+void
+AnimationTimeline::GetAnimations(AnimationSequence& aAnimations)
+{
+  // FIXME: Flush the document here (fixed in a subsequent patch)
+
+  mAnimations.EnumerateEntries(AppendAnimationToSequence, &aAnimations);
+}
+
 void
 AnimationTimeline::AddAnimation(Animation& aAnimation)
 {

dom/animation/AnimationTimeline.h

@@ -40,8 +40,11 @@ public:
 
   nsIGlobalObject* GetParentObject() const { return mWindow; }
 
+  typedef nsTArray<nsRefPtr<Animation>> AnimationSequence;
+
   // AnimationTimeline methods
   virtual Nullable<TimeDuration> GetCurrentTime() const = 0;
+  void GetAnimations(AnimationSequence& aAnimations);
 
   // Wrapper functions for AnimationTimeline DOM methods when called from
   // script.

dom/webidl/AnimationTimeline.webidl

@@ -14,7 +14,5 @@
 interface AnimationTimeline {
   [BinaryName="currentTimeAsDouble"]
   readonly attribute double? currentTime;
-  // Not yet implemented:
-  // Animation           play (optional TimedItem? source = null);
-  // sequence<Animation> getAnimations ();
+  sequence<Animation>        getAnimations ();
 };