Bug 1311257 - Support missing keyframes handling for stylo. r=birtles

MozReview-Commit-ID: 1Iz6By2Y2Gp

--HG--
extra : rebase_source : 94dd3845c271e89f88dc7351b4cea179bd3bb2e5

dom/animation/KeyframeEffectReadOnly.cpp

@@ -439,11 +439,7 @@ KeyframeEffectReadOnly::CompositeValue(
   CompositeOperation aCompositeOperation)
 {
   MOZ_ASSERT(mTarget, "CompositeValue should be called with target element");
-
-  // FIXME: Bug 1311257: Get the base value for the servo backend.
-  if (mDocument->IsStyledByServo()) {
-    return aValueToComposite;
-  }
+  MOZ_ASSERT(!mDocument->IsStyledByServo());
 
   StyleAnimationValue underlyingValue =
     GetUnderlyingStyle(aProperty, aAnimationRule);
@@ -672,13 +668,6 @@ KeyframeEffectReadOnly::ComposeStyleRule(
   // Bug 1329878 - Stylo: Implement accumulate and addition on Servo
   // AnimationValue.
 
-  // For unsupported or non-animatable animation types, we get nullptrs.
-  if (!aSegment.mFromValue.mServo|| !aSegment.mToValue.mServo) {
-    NS_ERROR("Compose style for unsupported or non-animatable property, "
-             "so get invalid RawServoAnimationValues");
-    return;
-  }
-
   Servo_AnimationCompose(&aAnimationValues,
                          &mBaseStyleValuesForServo,
                          aProperty.mProperty,

dom/animation/KeyframeUtils.cpp

@@ -469,9 +469,7 @@ KeyframeUtils::GetKeyframesFromObject(JSContext* aCx,
     return keyframes;
   }
 
-  // FIXME: Bug 1311257: Support missing keyframes for Servo backend.
-  if ((!AnimationUtils::IsCoreAPIEnabled() ||
-       aDocument->IsStyledByServo()) &&
+  if (!AnimationUtils::IsCoreAPIEnabled() &&
       RequiresAdditiveAnimation(keyframes, aDocument)) {
     keyframes.Clear();
     aRv.Throw(NS_ERROR_DOM_ANIM_MISSING_PROPS_ERR);
@@ -1444,8 +1442,6 @@ GetKeyframeListFromPropertyIndexedKeyframe(JSContext* aCx,
     return;
   }
 
-  bool isServoBackend = aDocument->IsStyledByServo();
-
   // Create a set of keyframes for each property.
   nsCSSParser parser(aDocument->CSSLoader());
   nsClassHashtable<nsFloatHashKey, Keyframe> processedKeyframes;
@@ -1458,9 +1454,8 @@ GetKeyframeListFromPropertyIndexedKeyframe(JSContext* aCx,
 
     // If we only have one value, we should animate from the underlying value
     // using additive animation--however, we don't support additive animation
-    // for Servo backend (bug 1311257) or when the core animation API pref is
-    // switched off.
-    if ((!AnimationUtils::IsCoreAPIEnabled() || isServoBackend) &&
+    // when the core animation API pref is switched off.
+    if ((!AnimationUtils::IsCoreAPIEnabled()) &&
         count == 1) {
       aRv.Throw(NS_ERROR_DOM_ANIM_MISSING_PROPS_ERR);
       return;