Current work-in-progress crbug.com/567021

third_party/WebKit/Source/core/css/RuleSet.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 117 matching lines @@
     unsigned c;
     unsigned d[4];
 };
 
 static_assert(sizeof(RuleData) == sizeof(SameSizeAsRuleData), "RuleData should stay small");
 
 class CORE_EXPORT RuleSet : public GarbageCollectedFinalized<RuleSet> {
     WTF_MAKE_NONCOPYABLE(RuleSet);
 public:
     static RuleSet* create() { return new RuleSet; }
+    static RuleSet* emptyRuleSet();
 
     void addRulesFromSheet(StyleSheetContents*, const MediaQueryEvaluator&, AddRuleFlags = RuleHasNoSpecialState);
     void addStyleRule(StyleRule*, AddRuleFlags);
     void addRule(StyleRule*, unsigned selectorIndex, AddRuleFlags);
 
     const RuleFeatureSet& features() const { return m_features; }
 
     const HeapTerminatedArray<RuleData>* idRules(const AtomicString& key) const { ASSERT(!m_pendingRules); return m_idRules.get(key); }
     const HeapTerminatedArray<RuleData>* classRules(const AtomicString& key) const { ASSERT(!m_pendingRules); return m_classRules.get(key); }
     const HeapTerminatedArray<RuleData>* tagRules(const AtomicString& key) const { ASSERT(!m_pendingRules); return m_tagRules.get(key); }
     const HeapTerminatedArray<RuleData>* shadowPseudoElementRules(const AtomicString& key) const { ASSERT(!m_pendingRules); return m_shadowPseudoElementRules.get(key); }
     const HeapVector<RuleData>* linkPseudoClassRules() const { ASSERT(!m_pendingRules); return &m_linkPseudoClassRules; }
     const HeapVector<RuleData>* cuePseudoRules() const { ASSERT(!m_pendingRules); return &m_cuePseudoRules; }
     const HeapVector<RuleData>* focusPseudoClassRules() const { ASSERT(!m_pendingRules); return &m_focusPseudoClassRules; }
     const HeapVector<RuleData>* universalRules() const { ASSERT(!m_pendingRules); return &m_universalRules; }
     const HeapVector<RuleData>* shadowHostRules() const { ASSERT(!m_pendingRules); return &m_shadowHostRules; }
     const HeapVector<Member<StyleRulePage>>& pageRules() const { ASSERT(!m_pendingRules); return m_pageRules; }
-    const HeapVector<Member<StyleRuleViewport>>& viewportRules() const { ASSERT(!m_pendingRules); return m_viewportRules; }
     const HeapVector<Member<StyleRuleFontFace>>& fontFaceRules() const { return m_fontFaceRules; }
     const HeapVector<Member<StyleRuleKeyframes>>& keyframesRules() const { return m_keyframesRules; }
     const HeapVector<MinimalRuleData>& deepCombinatorOrShadowPseudoRules() const { return m_deepCombinatorOrShadowPseudoRules; }
     const HeapVector<MinimalRuleData>& contentPseudoElementRules() const { return m_contentPseudoElementRules; }
     const HeapVector<MinimalRuleData>& slottedPseudoElementRules() const { return m_slottedPseudoElementRules; }
-    const MediaQueryResultList& viewportDependentMediaQueryResults() const { return m_viewportDependentMediaQueryResults; }
-    const MediaQueryResultList& deviceDependentMediaQueryResults() const { return m_deviceDependentMediaQueryResults; }
 
     unsigned ruleCount() const { return m_ruleCount; }
 
     void compactRulesIfNeeded()
     {
         if (!m_pendingRules)
             return;
         compactRules();
     }
 
 #ifndef NDEBUG
     void show() const;
 #endif
 
     DECLARE_TRACE();
 
 private:
     using PendingRuleMap = HeapHashMap<AtomicString, Member<HeapLinkedStack<RuleData>>>;
     using CompactRuleMap = HeapHashMap<AtomicString, Member<HeapTerminatedArray<RuleData>>>;
 
     RuleSet()
         : m_ruleCount(0)
     {
     }
 
     void addToRuleSet(const AtomicString& key, PendingRuleMap&, const RuleData&);
     void addPageRule(StyleRulePage*);
-    void addViewportRule(StyleRuleViewport*);
     void addFontFaceRule(StyleRuleFontFace*);
     void addKeyframesRule(StyleRuleKeyframes*);
 
     void addChildRules(const HeapVector<Member<StyleRuleBase>>&, const MediaQueryEvaluator& medium, AddRuleFlags);
     bool findBestRuleSetAndAdd(const CSSSelector&, RuleData&);
 
     void compactRules();
     static void compactPendingRules(PendingRuleMap&, CompactRuleMap&);
 
     class PendingRuleMaps : public GarbageCollected<PendingRuleMaps> {
@@ skipping 22 matching lines @@
     CompactRuleMap m_classRules;
     CompactRuleMap m_tagRules;
     CompactRuleMap m_shadowPseudoElementRules;
     HeapVector<RuleData> m_linkPseudoClassRules;
     HeapVector<RuleData> m_cuePseudoRules;
     HeapVector<RuleData> m_focusPseudoClassRules;
     HeapVector<RuleData> m_universalRules;
     HeapVector<RuleData> m_shadowHostRules;
     RuleFeatureSet m_features;
     HeapVector<Member<StyleRulePage>> m_pageRules;
-    HeapVector<Member<StyleRuleViewport>> m_viewportRules;
     HeapVector<Member<StyleRuleFontFace>> m_fontFaceRules;
     HeapVector<Member<StyleRuleKeyframes>> m_keyframesRules;
     HeapVector<MinimalRuleData> m_deepCombinatorOrShadowPseudoRules;
     HeapVector<MinimalRuleData> m_contentPseudoElementRules;
     HeapVector<MinimalRuleData> m_slottedPseudoElementRules;
 
-    MediaQueryResultList m_viewportDependentMediaQueryResults;
-    MediaQueryResultList m_deviceDependentMediaQueryResults;
-
     unsigned m_ruleCount;
     Member<PendingRuleMaps> m_pendingRules;
 
 #ifndef NDEBUG
     HeapVector<RuleData> m_allRules;
 #endif
 };
 
 } // namespace blink
 
 #endif // RuleSet_h