Prepare for responsive CSS animations.

Source/core/animation/css/CSSAnimationUpdate.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CSSAnimationUpdate_h
 #define CSSAnimationUpdate_h
 
 #include "core/animation/Interpolation.h"
+#include "core/animation/KeyframeEffectModel.h"
+#include "core/animation/css/CSSAnimatableValueFactory.h"
+#include "core/animation/css/CSSPropertyEquality.h"
 #include "core/css/CSSKeyframesRule.h"
+#include "core/layout/LayoutObject.h"
 #include "wtf/HashMap.h"
 #include "wtf/Vector.h"
 #include "wtf/text/AtomicString.h"
 
 namespace blink {
 
 class AnimationPlayer;
 class InertAnimation;
 
 // This class stores the CSS Animations/Transitions information we use during a style recalc.
@@ skipping 56 matching lines @@
         }
 
         AtomicString name;
         RawPtrWillBeMember<AnimationPlayer> player;
         RefPtrWillBeMember<InertAnimation> animation;
         Timing specifiedTiming;
         RefPtrWillBeMember<StyleRuleKeyframes> styleRule;
         unsigned styleRuleVersion;
     };
 
+    class UpdatedAnimationStyle {
+        ALLOW_ONLY_INLINE_ALLOCATION();
+    public:
+        struct CompositableStyleSnapshot {
+            RefPtrWillBeMember<AnimatableValue> opacity;
+            RefPtrWillBeMember<AnimatableValue> transform;
+            RefPtrWillBeMember<AnimatableValue> webkitFilter;
+        };
+
+        UpdatedAnimationStyle()
+        {
+        }
+
+        UpdatedAnimationStyle(AnimationPlayer* player, KeyframeEffectModelBase* effect, const UpdatedAnimationStyle::CompositableStyleSnapshot& snapshot)
+            : player(player)
+            , effect(effect)
+            , snapshot(snapshot)
+        {
+        }
+
+        void trace(Visitor* visitor)
+        {
+            visitor->trace(player);
+            visitor->trace(effect);
+        }
+
+        RawPtrWillBeMember<AnimationPlayer> player;
+        RawPtrWillBeMember<KeyframeEffectModelBase> effect;
+        CompositableStyleSnapshot snapshot;
+    };
+
     void startAnimation(const AtomicString& animationName, PassRefPtrWillBeRawPtr<InertAnimation> animation, const Timing& timing, PassRefPtrWillBeRawPtr<StyleRuleKeyframes> styleRule)
     {
         animation->setName(animationName);
         m_newAnimations.append(NewAnimation(animationName, animation, timing, styleRule));
     }
     // Returns whether player has been suppressed and should be filtered during style application.
     bool isSuppressedAnimation(const AnimationPlayer* player) const { return m_suppressedAnimationPlayers.contains(player); }
     void cancelAnimation(const AtomicString& name, AnimationPlayer& player)
     {
         m_cancelledAnimationNames.append(name);
         m_suppressedAnimationPlayers.add(&player);
     }
     void toggleAnimationPaused(const AtomicString& name)
     {
         m_animationsWithPauseToggled.append(name);
     }
     void updateAnimation(const AtomicString& name, AnimationPlayer* player, PassRefPtrWillBeRawPtr<InertAnimation> animation, const Timing& specifiedTiming,
         PassRefPtrWillBeRawPtr<StyleRuleKeyframes> styleRule)
     {
         m_animationsWithUpdates.append(UpdatedAnimation(name, player, animation, specifiedTiming, styleRule));
         m_suppressedAnimationPlayers.add(player);
     }
+    void updateAnimationStyle(AnimationPlayer* player, KeyframeEffectModelBase* effect, LayoutObject* renderer, const LayoutStyle& newStyle)
+    {
+        UpdatedAnimationStyle::CompositableStyleSnapshot snapshot;
+        if (renderer) {
+            const LayoutStyle& oldStyle = renderer->styleRef();
+            if (!CSSPropertyEquality::propertiesEqual(CSSPropertyOpacity, oldStyle, newStyle) && effect->affects(CSSPropertyOpacity))
+                snapshot.opacity = CSSAnimatableValueFactory::create(CSSPropertyOpacity, newStyle);
+            if (!CSSPropertyEquality::propertiesEqual(CSSPropertyTransform, oldStyle, newStyle) && effect->affects(CSSPropertyTransform))
+                snapshot.transform = CSSAnimatableValueFactory::create(CSSPropertyTransform, newStyle);
+            if (!CSSPropertyEquality::propertiesEqual(CSSPropertyWebkitFilter, oldStyle, newStyle) && effect->affects(CSSPropertyWebkitFilter))
+                snapshot.webkitFilter = CSSAnimatableValueFactory::create(CSSPropertyWebkitFilter, newStyle);
+        }
+
+        m_animationsWithStyleUpdates.append(UpdatedAnimationStyle(player, effect, snapshot));
+    }
 
     void startTransition(CSSPropertyID id, CSSPropertyID eventId, const AnimatableValue* from, const AnimatableValue* to, PassRefPtrWillBeRawPtr<InertAnimation> animation)
     {
         animation->setName(getPropertyName(id));
         NewTransition newTransition;
         newTransition.id = id;
         newTransition.eventId = eventId;
         newTransition.from = from;
         newTransition.to = to;
         newTransition.animation = animation;
         m_newTransitions.set(id, newTransition);
     }
     bool isCancelledTransition(CSSPropertyID id) const { return m_cancelledTransitions.contains(id); }
     void cancelTransition(CSSPropertyID id) { m_cancelledTransitions.add(id); }
 
     const WillBeHeapVector<NewAnimation>& newAnimations() const { return m_newAnimations; }
     const Vector<AtomicString>& cancelledAnimationNames() const { return m_cancelledAnimationNames; }
     const WillBeHeapHashSet<RawPtrWillBeMember<const AnimationPlayer>>& suppressedAnimationAnimationPlayers() const { return m_suppressedAnimationPlayers; }
     const Vector<AtomicString>& animationsWithPauseToggled() const { return m_animationsWithPauseToggled; }
     const WillBeHeapVector<UpdatedAnimation>& animationsWithUpdates() const { return m_animationsWithUpdates; }
+    const WillBeHeapVector<UpdatedAnimationStyle>& animationsWithStyleUpdates() const { return m_animationsWithStyleUpdates; }
 
     struct NewTransition {
         ALLOW_ONLY_INLINE_ALLOCATION();
     public:
         void trace(Visitor* visitor)
         {
             visitor->trace(from);
             visitor->trace(to);
             visitor->trace(animation);
         }
@@ skipping 14 matching lines @@
     const WillBeHeapHashMap<CSSPropertyID, RefPtrWillBeMember<Interpolation>>& activeInterpolationsForTransitions() const { return m_activeInterpolationsForTransitions; }
     WillBeHeapHashMap<CSSPropertyID, RefPtrWillBeMember<Interpolation>>& activeInterpolationsForAnimations() { return m_activeInterpolationsForAnimations; }
 
     bool isEmpty() const
     {
         return m_newAnimations.isEmpty()
             && m_cancelledAnimationNames.isEmpty()
             && m_suppressedAnimationPlayers.isEmpty()
             && m_animationsWithPauseToggled.isEmpty()
             && m_animationsWithUpdates.isEmpty()
+            && m_animationsWithStyleUpdates.isEmpty()
             && m_newTransitions.isEmpty()
             && m_cancelledTransitions.isEmpty()
             && m_activeInterpolationsForAnimations.isEmpty()
             && m_activeInterpolationsForTransitions.isEmpty();
     }
 
     void trace(Visitor*);
 
 private:
     // Order is significant since it defines the order in which new animations
     // will be started. Note that there may be multiple animations present
     // with the same name, due to the way in which we split up animations with
     // incomplete keyframes.
     WillBeHeapVector<NewAnimation> m_newAnimations;
     Vector<AtomicString> m_cancelledAnimationNames;
     WillBeHeapHashSet<RawPtrWillBeMember<const AnimationPlayer>> m_suppressedAnimationPlayers;
     Vector<AtomicString> m_animationsWithPauseToggled;
     WillBeHeapVector<UpdatedAnimation> m_animationsWithUpdates;
+    WillBeHeapVector<UpdatedAnimationStyle> m_animationsWithStyleUpdates;
 
     NewTransitionMap m_newTransitions;
     HashSet<CSSPropertyID> m_cancelledTransitions;
 
     WillBeHeapHashMap<CSSPropertyID, RefPtrWillBeMember<Interpolation>> m_activeInterpolationsForAnimations;
     WillBeHeapHashMap<CSSPropertyID, RefPtrWillBeMember<Interpolation>> m_activeInterpolationsForTransitions;
 };
 
 } // namespace blink
 
 WTF_ALLOW_INIT_WITH_MEM_FUNCTIONS(blink::CSSAnimationUpdate::NewAnimation);
 WTF_ALLOW_INIT_WITH_MEM_FUNCTIONS(blink::CSSAnimationUpdate::UpdatedAnimation);
 
 #endif