Bug 1194028 - Part 1: Implement Animation NotifyEffectTimingUpdate and KeyframeEffect SetTiming. r=bbirtles

dom/animation/Animation.cpp

@@ -650,6 +650,16 @@ Animation::ComposeStyle(nsRefPtr<AnimValuesStyleRule>& aStyleRule,
   }
 }
 
+void
+Animation::NotifyEffectTimingUpdated()
+{
+  MOZ_ASSERT(mEffect,
+             "We should only update timing effect when we have a target "
+             "effect");
+  UpdateTiming(Animation::SeekFlag::NoSeek,
+               Animation::SyncNotifyFlag::Async);
+}
+
 // http://w3c.github.io/web-animations/#play-an-animation
 void
 Animation::DoPlay(ErrorResult& aRv, LimitBehavior aLimitBehavior)

dom/animation/Animation.h

@@ -297,6 +297,9 @@ public:
   void ComposeStyle(nsRefPtr<AnimValuesStyleRule>& aStyleRule,
                     nsCSSPropertySet& aSetProperties,
                     bool& aNeedsRefreshes);
+
+  void NotifyEffectTimingUpdated();
+
 protected:
   void SilentlySetCurrentTime(const TimeDuration& aNewCurrentTime);
   void SilentlySetPlaybackRate(double aPlaybackRate);

dom/animation/KeyframeEffect.cpp

@@ -87,6 +87,17 @@ KeyframeEffectReadOnly::SetParentTime(Nullable<TimeDuration> aParentTime)
   mParentTime = aParentTime;
 }
 
+void
+KeyframeEffectReadOnly::SetTiming(const AnimationTiming& aTiming,
+                                  Animation& aOwningAnimation)
+{
+  if (mTiming == aTiming) {
+    return;
+  }
+  mTiming = aTiming;
+  aOwningAnimation.NotifyEffectTimingUpdated();
+}
+
 ComputedTiming
 KeyframeEffectReadOnly::GetComputedTimingAt(
                           const Nullable<TimeDuration>& aLocalTime,

dom/animation/KeyframeEffect.h

@@ -242,6 +242,10 @@ public:
     return mTiming;
   }
 
+  // FIXME: Drop |aOwningAnimation| once we make AnimationEffects track their
+  // owning animation.
+  void SetTiming(const AnimationTiming& aTiming, Animation& aOwningAnimtion);
+
   // Return the duration from the start the active interval to the point where
   // the animation begins playback. This is zero unless the animation has
   // a negative delay in which case it is the absolute value of the delay.