Current work-in-progress crbug.com/567021

third_party/WebKit/Source/core/css/resolver/StyleResolver.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 StyleResolver_h
 #define StyleResolver_h
 
 #include "core/CoreExport.h"
 #include "core/animation/PropertyHandle.h"
 #include "core/css/ElementRuleCollector.h"
 #include "core/css/PseudoStyleRequest.h"
-#include "core/css/RuleFeature.h"
-#include "core/css/RuleSet.h"
 #include "core/css/SelectorChecker.h"
 #include "core/css/SelectorFilter.h"
 #include "core/css/resolver/CSSPropertyPriority.h"
 #include "core/css/resolver/MatchedPropertiesCache.h"
 #include "core/css/resolver/StyleBuilder.h"
-#include "core/dom/DocumentOrderedList.h"
 #include "core/style/CachedUAStyle.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Deque.h"
 #include "wtf/HashMap.h"
 #include "wtf/HashSet.h"
 #include "wtf/ListHashSet.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class AnimatableValue;
 class CSSRuleList;
 class CSSStyleSheet;
 class CSSValue;
 class ContainerNode;
 class Document;
 class Element;
 class Interpolation;
 class MatchResult;
-class MediaQueryEvaluator;
+class RuleSet;
 class ScopedStyleResolver;
 class StylePropertySet;
 class StyleRule;
-class ViewportStyleResolver;
 
 enum StyleSharingBehavior {
     AllowStyleSharing,
     DisallowStyleSharing,
 };
 
 enum RuleMatchingBehavior {
     MatchAllRules,
     MatchAllRulesExcludingSMIL
 };
@@ skipping 20 matching lines @@
     static PassRefPtr<AnimatableValue> createAnimatableValueSnapshot(Element&, const ComputedStyle* baseStyle, CSSPropertyID, CSSValue*);
     static PassRefPtr<AnimatableValue> createAnimatableValueSnapshot(StyleResolverState&, CSSPropertyID, CSSValue*);
 
     PassRefPtr<ComputedStyle> pseudoStyleForElement(Element*, const PseudoStyleRequest&, const ComputedStyle* parentStyle);
 
     PassRefPtr<ComputedStyle> styleForPage(int pageIndex);
     PassRefPtr<ComputedStyle> styleForText(Text*);
 
     static PassRefPtr<ComputedStyle> styleForDocument(Document&);
 
-    // FIXME: It could be better to call appendAuthorStyleSheets() directly after we factor StyleResolver further.
-    // https://bugs.webkit.org/show_bug.cgi?id=108890
-    void appendAuthorStyleSheets(const HeapVector<Member<CSSStyleSheet>>&);
-    void resetAuthorStyle(TreeScope&);
-    void resetRuleFeatures();
-    void finishAppendAuthorStyleSheets();
-
-    void lazyAppendAuthorStyleSheets(unsigned firstNew, const HeapVector<Member<CSSStyleSheet>>&);
-    void removePendingAuthorStyleSheets(const HeapVector<Member<CSSStyleSheet>>&);
-    void appendPendingAuthorStyleSheets();
-    bool hasPendingAuthorStyleSheets() const { return m_pendingStyleSheets.size() > 0 || m_needCollectFeatures; }
-
     // TODO(esprehn): StyleResolver should probably not contain tree walking
     // state, instead we should pass a context object during recalcStyle.
     SelectorFilter& selectorFilter() { return m_selectorFilter; }
 
     StyleRuleKeyframes* findKeyframesRule(const Element*, const AtomicString& animationName);
 
     // These methods will give back the set of rules that matched for a given element (or a pseudo-element).
     enum CSSRuleFilter {
         UAAndUserCSSRules   = 1 << 1,
         AuthorCSSRules      = 1 << 2,
         EmptyCSSRules       = 1 << 3,
         CrossOriginCSSRules = 1 << 4,
         AllButEmptyCSSRules = UAAndUserCSSRules | AuthorCSSRules | CrossOriginCSSRules,
         AllCSSRules         = AllButEmptyCSSRules | EmptyCSSRules,
     };
     CSSRuleList* cssRulesForElement(Element*, unsigned rulesToInclude = AllButEmptyCSSRules);
     CSSRuleList* pseudoCSSRulesForElement(Element*, PseudoId, unsigned rulesToInclude = AllButEmptyCSSRules);
     StyleRuleList* styleRulesForElement(Element*, unsigned rulesToInclude);
 
     void computeFont(ComputedStyle*, const StylePropertySet&);
 
-    ViewportStyleResolver* viewportStyleResolver() { return m_viewportStyleResolver.get(); }
-
-    void addViewportDependentMediaQueries(const MediaQueryResultList&);
-    bool hasViewportDependentMediaQueries() const { return !m_viewportDependentMediaQueryResults.isEmpty(); }
-    bool mediaQueryAffectedByViewportChange() const;
-    void addDeviceDependentMediaQueries(const MediaQueryResultList&);
-    bool mediaQueryAffectedByDeviceChange() const;
-
     // FIXME: Rename to reflect the purpose, like didChangeFontSize or something.
     void invalidateMatchedPropertiesCache();
 
     void notifyResizeForViewportUnits();
 
     // Exposed for ComputedStyle::isStyleAvilable().
     static ComputedStyle* styleNotYetAvailable() { return s_styleNotYetAvailable; }
 
-    RuleFeatureSet& ensureUpdatedRuleFeatureSet()
-    {
-        if (hasPendingAuthorStyleSheets())
-            appendPendingAuthorStyleSheets();
-        return m_features;
-    }
-
-    RuleFeatureSet& ruleFeatureSet()
-    {
-        return m_features;
-    }
-
     StyleSharingList& styleSharingList();
-
-    bool hasRulesForId(const AtomicString&) const;
-    bool hasFullscreenUAStyle() const { return m_hasFullscreenUAStyle; }
-
     void addToStyleSharingList(Element&);
     void clearStyleSharingList();
 
     void increaseStyleSharingDepth() { ++m_styleSharingDepth; }
     void decreaseStyleSharingDepth() { --m_styleSharingDepth; }
 
     PseudoElement* createPseudoElementIfNeeded(Element& parent, PseudoId);
 
     DECLARE_TRACE();
 
-    void addTreeBoundaryCrossingScope(ContainerNode& scope);
-    void initWatchedSelectorRules();
-
 private:
     explicit StyleResolver(Document&);
 
     PassRefPtr<ComputedStyle> initialStyleForElement();
 
     // FIXME: This should probably go away, folded into FontBuilder.
     void updateFont(StyleResolverState&);
 
     void loadPendingResources(StyleResolverState&);
     void adjustComputedStyle(StyleResolverState&, Element*);
 
-    void appendCSSStyleSheet(CSSStyleSheet&);
-
     void collectPseudoRulesForElement(const Element&, ElementRuleCollector&, PseudoId, unsigned rulesToInclude);
     void matchRuleSet(ElementRuleCollector&, RuleSet*);
     void matchUARules(ElementRuleCollector&);
     void matchScopedRules(const Element&, ElementRuleCollector&);
     void matchAuthorRules(const Element&, ElementRuleCollector&);
     void matchAuthorRulesV0(const Element&, ElementRuleCollector&);
     void matchAllRules(StyleResolverState&, ElementRuleCollector&, bool includeSMILProperties);
-    void collectFeatures();
     void collectTreeBoundaryCrossingRules(const Element&, ElementRuleCollector&);
 
     void applyMatchedProperties(StyleResolverState&, const MatchResult&);
     bool applyAnimatedProperties(StyleResolverState&, const Element* animatingElement);
     void applyCallbackSelectors(StyleResolverState&);
 
     template <CSSPropertyPriority priority>
     void applyMatchedProperties(StyleResolverState&, const MatchedPropertiesRange&, bool important, bool inheritedOnly);
     template <CSSPropertyPriority priority>
     void applyProperties(StyleResolverState&, const StylePropertySet* properties, bool isImportant, bool inheritedOnly, PropertyWhitelistType = PropertyWhitelistNone);
     template <CSSPropertyPriority priority>
     void applyAnimatedProperties(StyleResolverState&, const ActiveInterpolationsMap&);
     template <CSSPropertyPriority priority>
     void applyAllProperty(StyleResolverState&, CSSValue*, bool inheritedOnly, PropertyWhitelistType);
     template <CSSPropertyPriority priority>
     void applyPropertiesForApplyAtRule(StyleResolverState&, const CSSValue*, bool isImportant, bool inheritedOnly, PropertyWhitelistType);
 
     bool pseudoStyleForElementInternal(Element&, const PseudoStyleRequest&, const ComputedStyle* parentStyle, StyleResolverState&);
     bool hasAuthorBackground(const StyleResolverState&);
     bool hasAuthorBorder(const StyleResolverState&);
 
     PseudoElement* createPseudoElement(Element* parent, PseudoId);
 
     Document& document() { return *m_document; }
 
     static ComputedStyle* s_styleNotYetAvailable;
 
     MatchedPropertiesCache m_matchedPropertiesCache;
 
-    Member<MediaQueryEvaluator> m_medium;
-    MediaQueryResultList m_viewportDependentMediaQueryResults;
-    MediaQueryResultList m_deviceDependentMediaQueryResults;
-
     Member<Document> m_document;
     SelectorFilter m_selectorFilter;
 
-    Member<ViewportStyleResolver> m_viewportStyleResolver;
+    bool m_printMediaType = false;
 
-    HeapListHashSet<Member<CSSStyleSheet>, 16> m_pendingStyleSheets;
-
-    // FIXME: The entire logic of collecting features on StyleResolver, as well as transferring them
-    // between various parts of machinery smells wrong. This needs to be better somehow.
-    RuleFeatureSet m_features;
-    Member<RuleSet> m_siblingRuleSet;
-    Member<RuleSet> m_uncommonAttributeRuleSet;
-    Member<RuleSet> m_watchedSelectorsRules;
-
-    DocumentOrderedList m_treeBoundaryCrossingScopes;
-
-    bool m_needCollectFeatures;
-    bool m_printMediaType;
-    bool m_hasFullscreenUAStyle = false;
-
-    unsigned m_styleSharingDepth;
+    unsigned m_styleSharingDepth = 0;
     HeapVector<Member<StyleSharingList>, styleSharingMaxDepth> m_styleSharingLists;
 };
 
 } // namespace blink
 
 #endif // StyleResolver_h