Add a first pass of a class descendant invalidator, and a containing RuleSetAnalyzer

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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef RuleFeature_h
 #define RuleFeature_h
 
+#include "core/css/analyzer/RuleSetAnalyzer.h"
 #include "wtf/Forward.h"
 #include "wtf/HashSet.h"
 #include "wtf/text/AtomicStringHash.h"
 
 namespace WebCore {
 
 class StyleRule;
 class CSSSelector;
 class CSSSelectorList;
 
@@ skipping 12 matching lines @@
 class RuleFeatureSet {
 public:
     RuleFeatureSet()
         : m_usesFirstLineRules(false)
         , m_maxDirectAdjacentSelectors(0)
     { }
 
     void add(const RuleFeatureSet&);
     void clear();
 
-    void collectFeaturesFromSelector(const CSSSelector*);
+    void collectFeaturesFromSelector(const CSSSelector*, HashSet<AtomicString>* classesInRulesArg);
 
     bool usesSiblingRules() const { return !siblingRules.isEmpty(); }
     bool usesFirstLineRules() const { return m_usesFirstLineRules; }
 
     unsigned maxDirectAdjacentSelectors() const { return m_maxDirectAdjacentSelectors; }
     void setMaxDirectAdjacentSelectors(unsigned value)  { m_maxDirectAdjacentSelectors = std::max(value, m_maxDirectAdjacentSelectors); }
 
     inline bool hasSelectorForAttribute(const AtomicString& attributeName) const
     {
         ASSERT(!attributeName.isEmpty());
         return attrsInRules.contains(attributeName);
     }
 
     inline bool hasSelectorForClass(const AtomicString& classValue) const
     {
         ASSERT(!classValue.isEmpty());
         return classesInRules.contains(classValue);
     }
 
     inline bool hasSelectorForId(const AtomicString& idValue) const
     {
         ASSERT(!idValue.isEmpty());
         return idsInRules.contains(idValue);
     }
 
+    RuleSetAnalyzer* getRuleSetAnalyzer() const;
+    RuleSetAnalyzer* ensureRuleSetAnalyzer();
+
+    // FIXME: move this stuff into the rule set analyzer.
     HashSet<AtomicString> idsInRules;
     HashSet<AtomicString> classesInRules;
     HashSet<AtomicString> attrsInRules;
     Vector<RuleFeature> siblingRules;
     Vector<RuleFeature> uncommonAttributeRules;
 private:
-    void collectFeaturesFromSelectorList(const CSSSelectorList*);
+    RefPtr<RuleSetAnalyzer> ruleSetAnalyzer;
+
+    void collectFeaturesFromSelectorList(const CSSSelectorList*, HashSet<AtomicString>* classesInRulesArg);
 
     bool m_usesFirstLineRules;
     unsigned m_maxDirectAdjacentSelectors;
 };
 
 } // namespace WebCore
 
 #endif // RuleFeature_h