Check interpolatable to tell whether transition is created or not.

servo · Aug 15, 2017 · f6b8fb1 · f6b8fb1
1 parent 4771e6e
commit f6b8fb1
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/components/style/gecko/wrapper.rs b/components/style/gecko/wrapper.rs
@@ -1396,6 +1396,8 @@ impl<'le> TElement for GeckoElement<'le> {
                                              existing_transitions: &HashMap<TransitionProperty,
                                                                             Arc<AnimationValue>>)
                                              -> bool {
+        use properties::animated_properties::Animatable;
+
         // |property| should be an animatable longhand
         let animatable_longhand = AnimatableLonghand::from_transition_property(property).unwrap();
 
@@ -1414,7 +1416,9 @@ impl<'le> TElement for GeckoElement<'le> {
         let to = AnimationValue::from_computed_values(&animatable_longhand,
                                                       after_change_style);
 
-        combined_duration > 0.0f32 && from != to
+        combined_duration > 0.0f32 &&
+        from != to &&
+        from.interpolate(&to, 0.5).is_ok()
     }
 
     #[inline]