| /* |
| * (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 THIRD_PARTY_BLINK_RENDERER_CORE_CSS_STYLE_SHEET_CONTENTS_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_STYLE_SHEET_CONTENTS_H_ |
| |
| #include "third_party/blink/renderer/core/core_export.h" |
| #include "third_party/blink/renderer/core/css/parser/css_parser_context.h" |
| #include "third_party/blink/renderer/core/css/parser/css_tokenizer.h" |
| #include "third_party/blink/renderer/core/css/rule_set.h" |
| #include "third_party/blink/renderer/core/css/rule_set_diff.h" |
| #include "third_party/blink/renderer/core/loader/resource/css_style_sheet_resource.h" |
| #include "third_party/blink/renderer/platform/heap/collection_support/heap_hash_set.h" |
| #include "third_party/blink/renderer/platform/heap/garbage_collected.h" |
| #include "third_party/blink/renderer/platform/loader/fetch/render_blocking_behavior.h" |
| #include "third_party/blink/renderer/platform/weborigin/kurl.h" |
| #include "third_party/blink/renderer/platform/wtf/hash_map.h" |
| #include "third_party/blink/renderer/platform/wtf/text/atomic_string.h" |
| #include "third_party/blink/renderer/platform/wtf/text/atomic_string_hash.h" |
| #include "third_party/blink/renderer/platform/wtf/text/string_hash.h" |
| #include "third_party/blink/renderer/platform/wtf/text/text_position.h" |
| #include "third_party/blink/renderer/platform/wtf/text/wtf_string.h" |
| #include "third_party/blink/renderer/platform/wtf/vector.h" |
| |
| namespace blink { |
| |
| class CSSStyleSheet; |
| class Document; |
| class Node; |
| class StyleRuleBase; |
| class StyleRuleFontFace; |
| class RuleSetDiff; |
| class StyleRuleImport; |
| class StyleRuleNamespace; |
| enum class ParseSheetResult; |
| |
| class CORE_EXPORT StyleSheetContents final |
| : public GarbageCollected<StyleSheetContents> { |
| public: |
| static const Document* SingleOwnerDocument(const StyleSheetContents*); |
| |
| StyleSheetContents(const CSSParserContext* context, |
| const String& original_url = String(), |
| StyleRuleImport* owner_rule = nullptr); |
| StyleSheetContents(const StyleSheetContents&); |
| StyleSheetContents() = delete; |
| ~StyleSheetContents(); |
| |
| // TODO(xiaochengh): |parser_context_| should never be null. Make it return a |
| // const reference here to avoid confusion. |
| const CSSParserContext* ParserContext() const { |
| return parser_context_.Get(); |
| } |
| |
| const AtomicString& DefaultNamespace() const { return default_namespace_; } |
| const AtomicString& NamespaceURIFromPrefix(const AtomicString& prefix) const; |
| |
| void ParseAuthorStyleSheet(const CSSStyleSheetResource*); |
| ParseSheetResult ParseString(const String&, bool allow_import_rules = true); |
| |
| bool IsCacheableForResource() const; |
| bool IsCacheableForStyleElement() const; |
| |
| bool IsLoading() const; |
| |
| void CheckLoaded(); |
| |
| // Called if this sheet has finished loading and then a dynamically added |
| // @import rule starts loading a child stylesheet. |
| void SetToPendingState(); |
| |
| 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 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(); |
| |
| // If the given rule exists, replace it with the new one. This is used when |
| // CSSOM wants to modify the rule but cannot do so without reallocating |
| // (see setCssSelectorText()). |
| // |
| // The position_hint variable is a pure hint as of where the old rule can |
| // be found; if it is wrong or out-of-range (for instance because the rule |
| // has been deleted, or some have been moved around), the function is still |
| // safe to call, but will do a linear search for the rule. The return value |
| // is an updated position hint suitable for the next ReplaceRuleIfExists() |
| // call on the same (new) rule. The position_hint is not capable of describing |
| // rules nested within other rules; the result will still be correct, but the |
| // search will be slow for such rules. |
| wtf_size_t ReplaceRuleIfExists(StyleRuleBase* old_rule, |
| StyleRuleBase* new_rule, |
| wtf_size_t position_hint); |
| |
| // Notify the style sheet that a rule has changed externally, for diff |
| // purposes (see RuleSetDiff). In particular, if a rule changes selector |
| // text or properties, we need to know about it here, since there's no |
| // other way StyleSheetContents gets to know about such changes. |
| // WrapperInsertRule() and other explicit changes to StyleSheetContents |
| // already mark changes themselves. |
| void NotifyRuleChanged(StyleRuleBase* rule) { |
| if (rule_set_diff_) { |
| rule_set_diff_->AddDiff(rule); |
| } |
| } |
| void NotifyDiffUnrepresentable() { |
| if (rule_set_diff_) { |
| rule_set_diff_->MarkUnrepresentable(); |
| } |
| } |
| |
| // Get/clear the diff between last time we did StartMutation() |
| // (with an existing rule set) and now. See RuleSetDiff for more information. |
| RuleSetDiff* GetRuleSetDiff() const { return rule_set_diff_.Get(); } |
| void ClearRuleSetDiff() { rule_set_diff_.Clear(); } |
| |
| // Rules other than @import. |
| const HeapVector<Member<StyleRuleBase>>& ChildRules() const { |
| return child_rules_; |
| } |
| const HeapVector<Member<StyleRuleLayerStatement>>& |
| PreImportLayerStatementRules() const { |
| return pre_import_layer_statement_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_.Get(); } |
| void ClearOwnerRule() { owner_rule_ = nullptr; } |
| |
| // 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_; } |
| // The response URL after redirects and service worker interception. |
| const KURL& BaseURL() const { return parser_context_->BaseURL(); } |
| |
| // If true, allows reading and modifying of the CSS rules. |
| // https://drafts.csswg.org/cssom/#concept-css-style-sheet-origin-clean-flag |
| bool IsOriginClean() const { return parser_context_->IsOriginClean(); } |
| |
| unsigned RuleCount() const; |
| StyleRuleBase* RuleAt(unsigned index) const; |
| |
| unsigned EstimatedSizeInBytes() const; |
| |
| bool WrapperInsertRule(StyleRuleBase*, unsigned index); |
| bool WrapperDeleteRule(unsigned index); |
| |
| StyleSheetContents* Copy() const { |
| return MakeGarbageCollected<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 StartMutation(); |
| |
| bool IsUsedFromTextCache() const { return is_used_from_text_cache_; } |
| void SetIsUsedFromTextCache() { is_used_from_text_cache_ = true; } |
| |
| bool IsReferencedFromResource() const { |
| return referenced_from_resource_ != nullptr; |
| } |
| void SetReferencedFromResource(CSSStyleSheetResource*); |
| void ClearReferencedFromResource(); |
| |
| void SetHasMediaQueries(); |
| bool HasMediaQueries() const { return has_media_queries_; } |
| |
| bool DidLoadErrorOccur() const { return did_load_error_occur_; } |
| |
| RuleSet& GetRuleSet() { |
| DCHECK(rule_set_); |
| return *rule_set_.Get(); |
| } |
| |
| bool HasRuleSet() { return rule_set_.Get(); } |
| RuleSet& EnsureRuleSet(const MediaQueryEvaluator&); |
| void ClearRuleSet(); |
| |
| String SourceMapURL() const { return source_map_url_; } |
| |
| void SetRenderBlocking(RenderBlockingBehavior behavior) { |
| render_blocking_behavior_ = behavior; |
| } |
| RenderBlockingBehavior GetRenderBlockingBehavior() const { |
| return render_blocking_behavior_; |
| } |
| |
| void Trace(Visitor*) const; |
| |
| private: |
| StyleSheetContents& operator=(const StyleSheetContents&) = delete; |
| void NotifyRemoveFontFaceRule(const StyleRuleFontFace*); |
| |
| Document* ClientSingleOwnerDocument() const; |
| Document* ClientAnyOwnerDocument() const; |
| |
| Member<StyleRuleImport> owner_rule_; |
| |
| String original_url_; |
| |
| HeapVector<Member<StyleRuleLayerStatement>> pre_import_layer_statement_rules_; |
| 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_; |
| // If we have modified the style sheet since last creating |
| // a rule set, this will be nonempty and contain the relevant |
| // diffs (see RuleSetDiff). Constructed by StartMutation(). |
| Member<RuleSetDiff> rule_set_diff_; |
| |
| String source_map_url_; |
| RenderBlockingBehavior render_blocking_behavior_ = |
| RenderBlockingBehavior::kUnset; |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_STYLE_SHEET_CONTENTS_H_ |