Current work-in-progress crbug.com/567021

third_party/WebKit/Source/core/css/CSSStyleSheet.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2006, 2007, 2008, 2009, 2010, 2012 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 CSSStyleSheet_h
 #define CSSStyleSheet_h
 
 #include "core/CoreExport.h"
 #include "core/css/CSSRule.h"
+#include "core/css/MediaQueryEvaluator.h"
 #include "core/css/StyleSheet.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/text/TextPosition.h"
 
 namespace blink {
 
 class CSSImportRule;
 class CSSRule;
 class CSSRuleList;
 class CSSStyleSheet;
 class Document;
 class ExceptionState;
 class MediaQuerySet;
 class SecurityOrigin;
 class StyleSheetContents;
 
-enum StyleSheetUpdateType {
-    PartialRuleUpdate,
-    EntireStyleSheetUpdate
-};
-
 class CORE_EXPORT CSSStyleSheet final : public StyleSheet {
     DEFINE_WRAPPERTYPEINFO();
     WTF_MAKE_NONCOPYABLE(CSSStyleSheet);
 public:
     static CSSStyleSheet* create(StyleSheetContents*, CSSImportRule* ownerRule = 0);
     static CSSStyleSheet* create(StyleSheetContents*, Node* ownerNode);
     static CSSStyleSheet* createInline(Node*, const KURL&, const TextPosition& startPosition = TextPosition::minimumPosition(), const String& encoding = String());
     static CSSStyleSheet* createInline(StyleSheetContents*, Node* ownerNode, const TextPosition& startPosition = TextPosition::minimumPosition());
 
     ~CSSStyleSheet() override;
@@ skipping 24 matching lines @@
     void clearOwnerNode() override;
 
     CSSRule* ownerRule() const override { return m_ownerRule; }
     KURL baseURL() const override;
     bool isLoading() const override;
 
     void clearOwnerRule() { m_ownerRule = nullptr; }
     Document* ownerDocument() const;
     MediaQuerySet* mediaQueries() const { return m_mediaQueries.get(); }
     void setMediaQueries(MediaQuerySet*);
+    bool matchesMediaQueries(const MediaQueryEvaluator&);
+    const MediaQueryResultList& viewportDependentMediaQueryResults() const { return m_viewportDependentMediaQueryResults; }
+    const MediaQueryResultList& deviceDependentMediaQueryResults() const { return m_deviceDependentMediaQueryResults; }
     void setTitle(const String& title) { m_title = title; }
     // Set by LinkStyle iff CORS-enabled fetch of stylesheet succeeded from this origin.
     void setAllowRuleAccessFromOrigin(PassRefPtr<SecurityOrigin> allowedOrigin);
 
     class RuleMutationScope {
         WTF_MAKE_NONCOPYABLE(RuleMutationScope);
         STACK_ALLOCATED();
     public:
         explicit RuleMutationScope(CSSStyleSheet*);
         explicit RuleMutationScope(CSSRule*);
         ~RuleMutationScope();
 
     private:
         Member<CSSStyleSheet> m_styleSheet;
     };
 
     void willMutateRules();
     void didMutateRules();
-    void didMutate(StyleSheetUpdateType = PartialRuleUpdate);
+    void didMutate();
 
     StyleSheetContents* contents() const { return m_contents.get(); }
 
     bool isInline() const { return m_isInlineStylesheet; }
     TextPosition startPositionInSource() const { return m_startPosition; }
 
     bool sheetLoaded();
     bool loadCompleted() const { return m_loadCompleted; }
     void startLoadingDynamicSheet();
     void setText(const String&);
@@ skipping 11 matching lines @@
 
     bool canAccessRules() const;
 
     void setLoadCompleted(bool);
 
     Member<StyleSheetContents> m_contents;
     bool m_isInlineStylesheet;
     bool m_isDisabled;
     String m_title;
     Member<MediaQuerySet> m_mediaQueries;
+    MediaQueryResultList m_viewportDependentMediaQueryResults;
+    MediaQueryResultList m_deviceDependentMediaQueryResults;
 
     RefPtr<SecurityOrigin> m_allowRuleAccessFromOrigin;
 
     Member<Node> m_ownerNode;
     Member<CSSRule> m_ownerRule;
 
     TextPosition m_startPosition;
     bool m_loadCompleted;
     mutable Member<MediaList> m_mediaCSSOMWrapper;
     mutable HeapVector<Member<CSSRule>> m_childRuleCSSOMWrappers;
@@ skipping 18 matching lines @@
 {
     if (m_styleSheet)
         m_styleSheet->didMutateRules();
 }
 
 DEFINE_TYPE_CASTS(CSSStyleSheet, StyleSheet, sheet, sheet->isCSSStyleSheet(), sheet.isCSSStyleSheet());
 
 } // namespace blink
 
 #endif