*** DO NOT LAND *** Attempt to understand Regions complexity

Source/core/css/parser/BisonCSSParser.h

 /*
  * Copyright (C) 2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 - 2010  Torch Mobile (Beijing) Co. Ltd. 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.
@@ skipping 258 matching lines @@
     bool parseTextUnderlinePosition(bool important);
 
     PassRefPtr<CSSValue> parseTextIndent();
 
     bool parseLineBoxContain(bool important);
     bool parseCalculation(CSSParserValue*, ValueRange);
 
     bool parseFontFeatureTag(CSSValueList*);
     bool parseFontFeatureSettings(bool important);
 
-    bool parseFlowThread(CSSPropertyID, bool important);
-    bool parseRegionThread(CSSPropertyID, bool important);
-
     bool parseFontVariantLigatures(bool important);
 
     bool parseGeneratedImage(CSSParserValueList*, RefPtr<CSSValue>&);
 
     CSSParserSelector* createFloatingSelector();
     CSSParserSelector* createFloatingSelectorWithTagName(const QualifiedName&);
     PassOwnPtr<CSSParserSelector> sinkFloatingSelector(CSSParserSelector*);
 
     Vector<OwnPtr<CSSParserSelector> >* createFloatingSelectorVector();
     PassOwnPtr<Vector<OwnPtr<CSSParserSelector> > > sinkFloatingSelectorVector(Vector<OwnPtr<CSSParserSelector> >*);
@@ skipping 12 matching lines @@
     StyleKeyframe* createKeyframe(CSSParserValueList*);
     StyleRuleKeyframes* createKeyframesRule(const String&, PassOwnPtr<Vector<RefPtr<StyleKeyframe> > >, bool isPrefixed);
 
     typedef Vector<RefPtr<StyleRuleBase> > RuleList;
     StyleRuleBase* createMediaRule(MediaQuerySet*, RuleList*);
     RuleList* createRuleList();
     RuleList* appendRule(RuleList*, StyleRuleBase*);
     StyleRuleBase* createStyleRule(Vector<OwnPtr<CSSParserSelector> >* selectors);
     StyleRuleBase* createFontFaceRule();
     StyleRuleBase* createPageRule(PassOwnPtr<CSSParserSelector> pageSelector);
-    StyleRuleBase* createRegionRule(Vector<OwnPtr<CSSParserSelector> >* regionSelector, RuleList* rules);
     StyleRuleBase* createMarginAtRule(CSSSelector::MarginBoxType);
     StyleRuleBase* createSupportsRule(bool conditionIsSupported, RuleList*);
     void markSupportsRuleHeaderStart();
     void markSupportsRuleHeaderEnd();
     PassRefPtr<CSSRuleSourceData> popSupportsRuleData();
     StyleRuleBase* createHostRule(RuleList* rules);
 
     void startDeclarationsForMarginBox();
     void endDeclarationsForMarginBox();
 
@@ skipping 16 matching lines @@
     CSSParserSelector* rewriteSpecifiersWithElementNameForCustomPseudoElement(const QualifiedName& tag, const AtomicString& elementName, CSSParserSelector* specifiers, bool tagIsForNamespaceRule);
     CSSParserSelector* rewriteSpecifiersWithElementNameForContentPseudoElement(const QualifiedName& tag, const AtomicString& elementName, CSSParserSelector* specifiers, bool tagIsForNamespaceRule);
     CSSParserSelector* rewriteSpecifiersWithNamespaceIfNeeded(CSSParserSelector*);
     CSSParserSelector* rewriteSpecifiers(CSSParserSelector*, CSSParserSelector*);
     CSSParserSelector* rewriteSpecifiersForShadowDistributed(CSSParserSelector* specifiers, CSSParserSelector* distributedPseudoElementSelector);
 
     void invalidBlockHit();
 
     Vector<OwnPtr<CSSParserSelector> >* reusableSelectorVector() { return &m_reusableSelectorVector; }
 
-    void setReusableRegionSelectorVector(Vector<OwnPtr<CSSParserSelector> >* selectors);
-    Vector<OwnPtr<CSSParserSelector> >* reusableRegionSelectorVector() { return &m_reusableRegionSelectorVector; }
-
     void clearProperties();
 
     PassRefPtr<ImmutableStylePropertySet> createStylePropertySet();
 
     CSSParserContext m_context;
 
     bool m_important;
     CSSPropertyID m_id;
     StyleSheetContents* m_styleSheet;
     RefPtr<StyleRuleBase> m_rule;
@@ skipping 173 matching lines @@
     Vector<CSSParserValueList*> m_floatingValueLists;
     Vector<CSSParserFunction*> m_floatingFunctions;
 
     OwnPtr<MediaQuery> m_floatingMediaQuery;
     OwnPtr<MediaQueryExp> m_floatingMediaQueryExp;
     OwnPtr<Vector<OwnPtr<MediaQueryExp> > > m_floatingMediaQueryExpList;
 
     OwnPtr<Vector<RefPtr<StyleKeyframe> > > m_floatingKeyframeVector;
 
     Vector<OwnPtr<CSSParserSelector> > m_reusableSelectorVector;
-    Vector<OwnPtr<CSSParserSelector> > m_reusableRegionSelectorVector;
 
     RefPtr<CSSCalcValue> m_parsedCalculation;
 
     OwnPtr<RuleSourceDataList> m_supportsRuleDataStack;
 
     // defines units allowed for a certain property, used in parseUnit
     enum Units {
         FUnknown = 0x0000,
         FInteger = 0x0001,
         FNumber = 0x0002, // Real Numbers
@@ skipping 66 matching lines @@
 bool isValidNthToken(const CSSParserString&);
 
 inline int cssyylex(void* yylval, BisonCSSParser* parser)
 {
     return parser->m_tokenizer.lex(yylval);
 }
 
 } // namespace WebCore
 
 #endif // CSSParser_h