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* (C) 1999-2003 Lars Knoll (
* 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
* 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 StyleSheetContents_h
#define StyleSheetContents_h
#include "core/CoreExport.h"
#include "core/css/RuleSet.h"
#include "core/css/parser/CSSParserContext.h"
#include "platform/heap/Handle.h"
#include "platform/weborigin/KURL.h"
#include "platform/wtf/HashMap.h"
#include "platform/wtf/Vector.h"
#include "platform/wtf/text/AtomicStringHash.h"
#include "platform/wtf/text/StringHash.h"
#include "platform/wtf/text/TextPosition.h"
namespace blink {
class CSSStyleSheet;
class CSSStyleSheetResource;
class Document;
class Node;
class SecurityOrigin;
class StyleRuleBase;
class StyleRuleFontFace;
class StyleRuleImport;
class StyleRuleNamespace;
class CORE_EXPORT StyleSheetContents
: public GarbageCollectedFinalized<StyleSheetContents> {
static StyleSheetContents* Create(const CSSParserContext* context) {
return new StyleSheetContents(nullptr, String(), context);
static StyleSheetContents* Create(const String& original_url,
const CSSParserContext* context) {
return new StyleSheetContents(nullptr, original_url, context);
static StyleSheetContents* Create(StyleRuleImport* owner_rule,
const String& original_url,
const CSSParserContext* context) {
return new StyleSheetContents(owner_rule, original_url, context);
static const Document* SingleOwnerDocument(const StyleSheetContents*);
const CSSParserContext* ParserContext() const { return parser_context_; }
const AtomicString& DefaultNamespace() const { return default_namespace_; }
const AtomicString& NamespaceURIFromPrefix(const AtomicString& prefix) const;
void ParseAuthorStyleSheet(const CSSStyleSheetResource*,
const SecurityOrigin*);
void ParseString(const String&);
void ParseStringAtPosition(const String&, const TextPosition&);
bool IsCacheableForResource() const;
bool IsCacheableForStyleElement() const;
bool IsLoading() const;
void CheckLoaded();
void StartLoadingDynamicSheet();
StyleSheetContents* RootStyleSheet() const;
bool HasSingleOwnerNode() const;
Node* SingleOwnerNode() const;
Document* SingleOwnerDocument() const;
bool HasSingleOwnerDocument() const { return has_single_owner_document_; }
// Gets the first owner document in the list of registered clients, or nullptr
// if there are none.
Document* AnyOwnerDocument() const;
const WTF::TextEncoding& Charset() const {
return parser_context_->Charset();
bool LoadCompleted() const;
bool HasFailedOrCanceledSubresources() const;
void SetHasSyntacticallyValidCSSHeader(bool is_valid_css);
bool HasSyntacticallyValidCSSHeader() const {
return has_syntactically_valid_css_header_;
void SetHasFontFaceRule() { has_font_face_rule_ = true; }
bool HasFontFaceRule() const { return has_font_face_rule_; }
void FindFontFaceRules(
HeapVector<Member<const StyleRuleFontFace>>& font_face_rules);
void SetHasViewportRule() { has_viewport_rule_ = true; }
bool HasViewportRule() const { return has_viewport_rule_; }
void ParserAddNamespace(const AtomicString& prefix, const AtomicString& uri);
void ParserAppendRule(StyleRuleBase*);
void ClearRules();
// Rules other than @import.
const HeapVector<Member<StyleRuleBase>>& ChildRules() const {
return child_rules_;
const HeapVector<Member<StyleRuleImport>>& ImportRules() const {
return import_rules_;
const HeapVector<Member<StyleRuleNamespace>>& NamespaceRules() const {
return namespace_rules_;
void NotifyLoadedSheet(const CSSStyleSheetResource*);
StyleSheetContents* ParentStyleSheet() const;
StyleRuleImport* OwnerRule() const { return owner_rule_; }
void ClearOwnerRule() { owner_rule_ = nullptr; }
// Note that href is the URL that started the redirect chain that led to
// this style sheet. This property probably isn't useful for much except
// the JavaScript binding (which needs to use this value for security).
String OriginalURL() const { return original_url_; }
const KURL& BaseURL() const { return parser_context_->BaseURL(); }
unsigned RuleCount() const;
StyleRuleBase* RuleAt(unsigned index) const;
unsigned EstimatedSizeInBytes() const;
bool WrapperInsertRule(StyleRuleBase*, unsigned index);
bool WrapperDeleteRule(unsigned index);
StyleSheetContents* Copy() const { return new StyleSheetContents(*this); }
void RegisterClient(CSSStyleSheet*);
void UnregisterClient(CSSStyleSheet*);
size_t ClientSize() const {
return loading_clients_.size() + completed_clients_.size();
bool HasOneClient() { return ClientSize() == 1; }
void ClientLoadCompleted(CSSStyleSheet*);
void ClientLoadStarted(CSSStyleSheet*);
bool IsMutable() const { return is_mutable_; }
void SetMutable() { is_mutable_ = true; }
bool IsUsedFromTextCache() const { return is_used_from_text_cache_; }
void SetIsUsedFromTextCache() { is_used_from_text_cache_ = true; }
bool IsReferencedFromResource() const { return referenced_from_resource_; }
void SetReferencedFromResource(CSSStyleSheetResource*);
void ClearReferencedFromResource();
void SetHasMediaQueries();
bool HasMediaQueries() const { return has_media_queries_; }
bool DidLoadErrorOccur() const { return did_load_error_occur_; }
RuleSet& GetRuleSet() {
return *rule_set_.Get();
bool HasRuleSet() { return rule_set_.Get(); }
RuleSet& EnsureRuleSet(const MediaQueryEvaluator&, AddRuleFlags);
void ClearRuleSet();
String SourceMapURL() const { return source_map_url_; }
void Trace(blink::Visitor*);
StyleSheetContents(StyleRuleImport* owner_rule,
const String& original_url,
const CSSParserContext*);
StyleSheetContents(const StyleSheetContents&);
StyleSheetContents() = delete;
StyleSheetContents& operator=(const StyleSheetContents&) = delete;
void NotifyRemoveFontFaceRule(const StyleRuleFontFace*);
Document* ClientSingleOwnerDocument() const;
Document* ClientAnyOwnerDocument() const;
Member<StyleRuleImport> owner_rule_;
String original_url_;
HeapVector<Member<StyleRuleImport>> import_rules_;
HeapVector<Member<StyleRuleNamespace>> namespace_rules_;
HeapVector<Member<StyleRuleBase>> child_rules_;
using PrefixNamespaceURIMap = HashMap<AtomicString, AtomicString>;
PrefixNamespaceURIMap namespaces_;
AtomicString default_namespace_;
WeakMember<CSSStyleSheetResource> referenced_from_resource_;
bool has_syntactically_valid_css_header_ : 1;
bool did_load_error_occur_ : 1;
bool is_mutable_ : 1;
bool has_font_face_rule_ : 1;
bool has_viewport_rule_ : 1;
bool has_media_queries_ : 1;
bool has_single_owner_document_ : 1;
bool is_used_from_text_cache_ : 1;
Member<const CSSParserContext> parser_context_;
HeapHashSet<WeakMember<CSSStyleSheet>> loading_clients_;
HeapHashSet<WeakMember<CSSStyleSheet>> completed_clients_;
Member<RuleSet> rule_set_;
String source_map_url_;
} // namespace blink