Use invalidation sets for :hover, :active, and :focus.

Source/core/css/RuleFeature.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 69 matching lines @@
         return m_classInvalidationSets.contains(classValue);
     }
 
     inline bool hasSelectorForId(const AtomicString& idValue) const
     {
         return m_idInvalidationSets.contains(idValue);
     }
 
     void scheduleStyleInvalidationForClassChange(const SpaceSplitString& changedClasses, Element&);
     void scheduleStyleInvalidationForClassChange(const SpaceSplitString& oldClasses, const SpaceSplitString& newClasses, Element&);
+    void scheduleStyleInvalidationForHoverChange(Element&);
+    void scheduleStyleInvalidationForActiveChange(Element&);
+    void scheduleStyleInvalidationForFocusChange(Element&);
 
     void scheduleStyleInvalidationForAttributeChange(const QualifiedName& attributeName, Element&);
 
     void scheduleStyleInvalidationForIdChange(const AtomicString& oldId, const AtomicString& newId, Element&);
 
     bool hasIdsInSelectors() const
     {
         return m_idInvalidationSets.size() > 0;
     }
 
@@ skipping 25 matching lines @@
     };
 
     enum InvalidationSetMode {
         AddFeatures,
         UseLocalStyleChange,
         UseSubtreeStyleChange
     };
 
     static InvalidationSetMode invalidationSetModeForSelector(const CSSSelector&);
 
-    void collectFeaturesFromSelector(const CSSSelector&, FeatureMetadata&, InvalidationSetMode);
-    void collectFeaturesFromSelectorList(const CSSSelectorList*, FeatureMetadata&, InvalidationSetMode);
+    void collectFeaturesFromSelector(const CSSSelector&, FeatureMetadata&, InvalidationSetMode, bool seenCombinator);
+    void collectFeaturesFromSelectorList(const CSSSelectorList*, FeatureMetadata&, InvalidationSetMode, bool seenCombinator);
 
     DescendantInvalidationSet& ensureClassInvalidationSet(const AtomicString& className);
     DescendantInvalidationSet& ensureAttributeInvalidationSet(const AtomicString& attributeName);
     DescendantInvalidationSet& ensureIdInvalidationSet(const AtomicString& attributeName);
-    DescendantInvalidationSet* invalidationSetForSelector(const CSSSelector&);
+    DescendantInvalidationSet& ensureHoverInvalidationSet();
+    DescendantInvalidationSet& ensureActiveInvalidationSet();
+    DescendantInvalidationSet& ensureFocusInvalidationSet();
+    DescendantInvalidationSet* invalidationSetForSelector(const CSSSelector&, bool seenCombinator);
 
     InvalidationSetMode updateInvalidationSets(const CSSSelector&);
 
     struct InvalidationSetFeatures {
         InvalidationSetFeatures() : customPseudoElement(false) { }
         Vector<AtomicString> classes;
         Vector<AtomicString> attributes;
         AtomicString id;
         AtomicString tagName;
         bool customPseudoElement;
     };
 
     static void extractInvalidationSetFeature(const CSSSelector&, InvalidationSetFeatures&);
     const CSSSelector* extractInvalidationSetFeatures(const CSSSelector&, InvalidationSetFeatures&);
     void addFeaturesToInvalidationSets(const CSSSelector&, const InvalidationSetFeatures&, bool wholeSubtree);
 
     void addClassToInvalidationSet(const AtomicString& className, Element&);
 
     FeatureMetadata m_metadata;
     InvalidationSetMap m_classInvalidationSets;
     InvalidationSetMap m_attributeInvalidationSets;
     InvalidationSetMap m_idInvalidationSets;
+    RefPtr<DescendantInvalidationSet> m_hoverInvalidationSet;
+    RefPtr<DescendantInvalidationSet> m_activeInvalidationSet;
+    RefPtr<DescendantInvalidationSet> m_focusInvalidationSet;
     bool m_targetedStyleRecalcEnabled;
     StyleInvalidator m_styleInvalidator;
 };
 
 
 } // namespace WebCore
 
 #endif // RuleFeature_h