From a2307adf46e92c2364f50110aa88a206747b900d Mon Sep 17 00:00:00 2001
From: Brian Birtles <birtles@gmail.com>
Date: Thu, 15 Jun 2017 10:18:55 +0900
Subject: [PATCH] Convert AnimationValue::from_computed_values to take an
 AnimatableLonghand

---
 components/style/gecko/wrapper.rs                      |  9 +++++----
 .../properties/helpers/animated_properties.mako.rs     | 10 ++++------
 ports/geckolib/glue.rs                                 |  7 ++++++-
 3 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/components/style/gecko/wrapper.rs b/components/style/gecko/wrapper.rs
index 539cb492adc..f1e84c2129c 100644
--- a/components/style/gecko/wrapper.rs
+++ b/components/style/gecko/wrapper.rs
@@ -1135,18 +1135,19 @@ impl<'le> TElement for GeckoElement<'le> {
             return false;
         }
 
+        // |property| should be an animatable longhand
+        let animatable_longhand = AnimatableLonghand::from_transition_property(property).unwrap();
+
         if existing_transitions.contains_key(property) {
             // If there is an existing transition, update only if the end value differs.
             // If the end value has not changed, we should leave the currently running
             // transition as-is since we don't want to interrupt its timing function.
             let after_value =
-                Arc::new(AnimationValue::from_computed_values(property, after_change_style));
+                Arc::new(AnimationValue::from_computed_values(&animatable_longhand,
+                                                              after_change_style));
             return existing_transitions.get(property).unwrap() != &after_value;
         }
 
-        // |property| should be an animatable longhand
-        let animatable_longhand = AnimatableLonghand::from_transition_property(property).unwrap();
-
         combined_duration > 0.0f32 &&
         AnimatedProperty::from_animatable_longhand(&animatable_longhand,
                                                    before_change_style,
diff --git a/components/style/properties/helpers/animated_properties.mako.rs b/components/style/properties/helpers/animated_properties.mako.rs
index 1f03bd4c071..57b5cd1138e 100644
--- a/components/style/properties/helpers/animated_properties.mako.rs
+++ b/components/style/properties/helpers/animated_properties.mako.rs
@@ -621,15 +621,14 @@ impl AnimationValue {
         }
     }
 
-    /// Get an AnimationValue for a TransitionProperty from a given computed values.
-    pub fn from_computed_values(transition_property: &TransitionProperty,
+    /// Get an AnimationValue for an AnimatableLonghand from a given computed values.
+    pub fn from_computed_values(property: &AnimatableLonghand,
                                 computed_values: &ComputedValues)
                                 -> Self {
-        match *transition_property {
-            TransitionProperty::All => panic!("Can't use TransitionProperty::All here."),
+        match *property {
             % for prop in data.longhands:
                 % if prop.animatable:
-                    TransitionProperty::${prop.camel_case} => {
+                    AnimatableLonghand::${prop.camel_case} => {
                         AnimationValue::${prop.camel_case}(
                         % if prop.is_animatable_with_computed_value:
                             computed_values.get_${prop.style_struct.ident.strip("_")}().clone_${prop.ident}())
@@ -640,7 +639,6 @@ impl AnimationValue {
                     }
                 % endif
             % endfor
-            ref other => panic!("Can't use TransitionProperty::{:?} here.", other),
         }
     }
 }
diff --git a/ports/geckolib/glue.rs b/ports/geckolib/glue.rs
index 81445b52022..dc9d7417266 100644
--- a/ports/geckolib/glue.rs
+++ b/ports/geckolib/glue.rs
@@ -688,8 +688,13 @@ pub extern "C" fn Servo_ComputedValues_ExtractAnimationValue(computed_values: Se
                                                              property_id: nsCSSPropertyID)
                                                              -> RawServoAnimationValueStrong
 {
+    let property = match AnimatableLonghand::from_nscsspropertyid(property_id) {
+        Some(longhand) => longhand,
+        None => { return Strong::null(); }
+    };
+
     let computed_values = ComputedValues::as_arc(&computed_values);
-    Arc::new(AnimationValue::from_computed_values(&property_id.into(), computed_values)).into_strong()
+    Arc::new(AnimationValue::from_computed_values(&property, computed_values)).into_strong()
 }
 
 #[no_mangle]