1 /* 2 * (C) 1999-2003 Lars Knoll (knoll@kde.org) 3 * Copyright (C) 2004, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved. 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Library General Public 7 * License as published by the Free Software Foundation; either 8 * version 2 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Library General Public License for more details. 14 * 15 * You should have received a copy of the GNU Library General Public License 16 * along with this library; see the file COPYING.LIB. If not, write to 17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 18 * Boston, MA 02110-1301, USA. 19 */ 20 21 #ifndef StyleSheetContents_h 22 #define StyleSheetContents_h 23 24 #include "core/css/RuleSet.h" 25 #include "platform/heap/Handle.h" 26 #include "platform/weborigin/KURL.h" 27 #include "wtf/HashMap.h" 28 #include "wtf/ListHashSet.h" 29 #include "wtf/RefCounted.h" 30 #include "wtf/Vector.h" 31 #include "wtf/text/AtomicStringHash.h" 32 #include "wtf/text/StringHash.h" 33 #include "wtf/text/TextPosition.h" 34 35 36 namespace blink { 37 38 class CSSStyleSheet; 39 class CSSStyleSheetResource; 40 class Document; 41 class Node; 42 class SecurityOrigin; 43 class StyleRuleBase; 44 class StyleRuleFontFace; 45 class StyleRuleImport; 46 47 class StyleSheetContents : public RefCountedWillBeGarbageCollectedFinalized<StyleSheetContents> { 48 public: create(const CSSParserContext & context)49 static PassRefPtrWillBeRawPtr<StyleSheetContents> create(const CSSParserContext& context) 50 { 51 return adoptRefWillBeNoop(new StyleSheetContents(0, String(), context)); 52 } create(const String & originalURL,const CSSParserContext & context)53 static PassRefPtrWillBeRawPtr<StyleSheetContents> create(const String& originalURL, const CSSParserContext& context) 54 { 55 return adoptRefWillBeNoop(new StyleSheetContents(0, originalURL, context)); 56 } create(StyleRuleImport * ownerRule,const String & originalURL,const CSSParserContext & context)57 static PassRefPtrWillBeRawPtr<StyleSheetContents> create(StyleRuleImport* ownerRule, const String& originalURL, const CSSParserContext& context) 58 { 59 return adoptRefWillBeNoop(new StyleSheetContents(ownerRule, originalURL, context)); 60 } 61 62 ~StyleSheetContents(); 63 parserContext()64 const CSSParserContext& parserContext() const { return m_parserContext; } 65 66 const AtomicString& determineNamespace(const AtomicString& prefix); 67 68 void parseAuthorStyleSheet(const CSSStyleSheetResource*, const SecurityOrigin*); 69 bool parseString(const String&); 70 bool parseStringAtPosition(const String&, const TextPosition&, bool); 71 72 bool isCacheable() const; 73 74 bool isLoading() const; 75 76 void checkLoaded(); 77 void startLoadingDynamicSheet(); 78 79 StyleSheetContents* rootStyleSheet() const; 80 bool hasSingleOwnerNode() const; 81 Node* singleOwnerNode() const; 82 Document* singleOwnerDocument() const; 83 charset()84 const String& charset() const { return m_parserContext.charset(); } 85 86 bool loadCompleted() const; 87 bool hasFailedOrCanceledSubresources() const; 88 89 KURL completeURL(const String& url) const; 90 91 void setHasSyntacticallyValidCSSHeader(bool isValidCss); hasSyntacticallyValidCSSHeader()92 bool hasSyntacticallyValidCSSHeader() const { return m_hasSyntacticallyValidCSSHeader; } 93 setHasFontFaceRule(bool b)94 void setHasFontFaceRule(bool b) { m_hasFontFaceRule = b; } hasFontFaceRule()95 bool hasFontFaceRule() const { return m_hasFontFaceRule; } 96 void findFontFaceRules(WillBeHeapVector<RawPtrWillBeMember<const StyleRuleFontFace> >& fontFaceRules); 97 98 void parserAddNamespace(const AtomicString& prefix, const AtomicString& uri); 99 void parserAppendRule(PassRefPtrWillBeRawPtr<StyleRuleBase>); 100 void parserSetEncodingFromCharsetRule(const String& encoding); parserSetUsesRemUnits(bool b)101 void parserSetUsesRemUnits(bool b) { m_usesRemUnits = b; } 102 103 void clearRules(); 104 hasCharsetRule()105 bool hasCharsetRule() const { return !m_encodingFromCharsetRule.isNull(); } encodingFromCharsetRule()106 String encodingFromCharsetRule() const { return m_encodingFromCharsetRule; } 107 // Rules other than @charset and @import. childRules()108 const WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase> >& childRules() const { return m_childRules; } importRules()109 const WillBeHeapVector<RefPtrWillBeMember<StyleRuleImport> >& importRules() const { return m_importRules; } 110 111 void notifyLoadedSheet(const CSSStyleSheetResource*); 112 113 StyleSheetContents* parentStyleSheet() const; ownerRule()114 StyleRuleImport* ownerRule() const { return m_ownerRule; } clearOwnerRule()115 void clearOwnerRule() { m_ownerRule = nullptr; } 116 117 // Note that href is the URL that started the redirect chain that led to 118 // this style sheet. This property probably isn't useful for much except 119 // the JavaScript binding (which needs to use this value for security). originalURL()120 String originalURL() const { return m_originalURL; } baseURL()121 const KURL& baseURL() const { return m_parserContext.baseURL(); } 122 123 unsigned ruleCount() const; 124 StyleRuleBase* ruleAt(unsigned index) const; 125 usesRemUnits()126 bool usesRemUnits() const { return m_usesRemUnits; } 127 128 unsigned estimatedSizeInBytes() const; 129 130 bool wrapperInsertRule(PassRefPtrWillBeRawPtr<StyleRuleBase>, unsigned index); 131 void wrapperDeleteRule(unsigned index); 132 copy()133 PassRefPtrWillBeRawPtr<StyleSheetContents> copy() const 134 { 135 return adoptRefWillBeNoop(new StyleSheetContents(*this)); 136 } 137 138 void registerClient(CSSStyleSheet*); 139 void unregisterClient(CSSStyleSheet*); clientSize()140 size_t clientSize() const { return m_loadingClients.size() + m_completedClients.size(); } hasOneClient()141 bool hasOneClient() { return clientSize() == 1; } 142 void clientLoadCompleted(CSSStyleSheet*); 143 void clientLoadStarted(CSSStyleSheet*); 144 isMutable()145 bool isMutable() const { return m_isMutable; } setMutable()146 void setMutable() { m_isMutable = true; } 147 148 void removeSheetFromCache(Document*); 149 isInMemoryCache()150 bool isInMemoryCache() const { return m_isInMemoryCache; } 151 void addedToMemoryCache(); 152 void removedFromMemoryCache(); 153 154 void setHasMediaQueries(); hasMediaQueries()155 bool hasMediaQueries() const { return m_hasMediaQueries; } 156 didLoadErrorOccur()157 bool didLoadErrorOccur() const { return m_didLoadErrorOccur; } 158 159 void shrinkToFit(); ruleSet()160 RuleSet& ruleSet() { ASSERT(m_ruleSet); return *m_ruleSet.get(); } 161 RuleSet& ensureRuleSet(const MediaQueryEvaluator&, AddRuleFlags); 162 void clearRuleSet(); 163 164 void trace(Visitor*); 165 166 private: 167 StyleSheetContents(StyleRuleImport* ownerRule, const String& originalURL, const CSSParserContext&); 168 StyleSheetContents(const StyleSheetContents&); 169 void notifyRemoveFontFaceRule(const StyleRuleFontFace*); 170 171 Document* clientSingleOwnerDocument() const; 172 void clearCharsetRule(); 173 174 RawPtrWillBeMember<StyleRuleImport> m_ownerRule; 175 176 String m_originalURL; 177 178 String m_encodingFromCharsetRule; 179 WillBeHeapVector<RefPtrWillBeMember<StyleRuleImport> > m_importRules; 180 WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase> > m_childRules; 181 typedef HashMap<AtomicString, AtomicString> PrefixNamespaceURIMap; 182 PrefixNamespaceURIMap m_namespaces; 183 184 bool m_hasSyntacticallyValidCSSHeader : 1; 185 bool m_didLoadErrorOccur : 1; 186 bool m_usesRemUnits : 1; 187 bool m_isMutable : 1; 188 bool m_isInMemoryCache : 1; 189 bool m_hasFontFaceRule : 1; 190 bool m_hasMediaQueries : 1; 191 bool m_hasSingleOwnerDocument : 1; 192 193 CSSParserContext m_parserContext; 194 195 WillBeHeapHashSet<RawPtrWillBeWeakMember<CSSStyleSheet> > m_loadingClients; 196 WillBeHeapHashSet<RawPtrWillBeWeakMember<CSSStyleSheet> > m_completedClients; 197 typedef WillBeHeapHashSet<RawPtrWillBeWeakMember<CSSStyleSheet> >::iterator ClientsIterator; 198 199 OwnPtrWillBeMember<RuleSet> m_ruleSet; 200 }; 201 202 } // namespace 203 204 #endif 205