1 /* 2 * (C) 1999-2003 Lars Knoll (knoll@kde.org) 3 * (C) 2002-2003 Dirk Mueller (mueller@kde.org) 4 * Copyright (C) 2002, 2006, 2008, 2012 Apple Inc. All rights reserved. 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Library General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Library General Public License for more details. 15 * 16 * You should have received a copy of the GNU Library General Public License 17 * along with this library; see the file COPYING.LIB. If not, write to 18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA. 20 */ 21 22 #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_CSS_STYLE_RULE_IMPORT_H_ 23 #define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_STYLE_RULE_IMPORT_H_ 24 25 #include "third_party/blink/renderer/core/css/css_origin_clean.h" 26 #include "third_party/blink/renderer/core/css/style_rule.h" 27 #include "third_party/blink/renderer/platform/heap/handle.h" 28 #include "third_party/blink/renderer/platform/loader/fetch/resource_client.h" 29 #include "third_party/blink/renderer/platform/wtf/casting.h" 30 31 namespace blink { 32 33 class MediaQuerySet; 34 class StyleSheetContents; 35 36 class StyleRuleImport : public StyleRuleBase { 37 USING_PRE_FINALIZER(StyleRuleImport, Dispose); 38 39 public: 40 StyleRuleImport(const String& href, 41 scoped_refptr<MediaQuerySet>, 42 OriginClean origin_clean); 43 ~StyleRuleImport(); 44 ParentStyleSheet()45 StyleSheetContents* ParentStyleSheet() const { return parent_style_sheet_; } SetParentStyleSheet(StyleSheetContents * sheet)46 void SetParentStyleSheet(StyleSheetContents* sheet) { 47 DCHECK(sheet); 48 parent_style_sheet_ = sheet; 49 } ClearParentStyleSheet()50 void ClearParentStyleSheet() { parent_style_sheet_ = nullptr; } 51 Href()52 String Href() const { return str_href_; } GetStyleSheet()53 StyleSheetContents* GetStyleSheet() const { return style_sheet_.Get(); } 54 55 bool IsLoading() const; MediaQueries()56 MediaQuerySet* MediaQueries() { return media_queries_.get(); } 57 58 void RequestStyleSheet(); 59 60 void TraceAfterDispatch(blink::Visitor*) const; 61 62 private: 63 // FIXME: inherit from ResourceClient directly to eliminate back 64 // pointer, as there are no space savings in this. 65 // NOTE: We put the ResourceClient in a member instead of inheriting 66 // from it to avoid adding a vptr to StyleRuleImport. 67 class ImportedStyleSheetClient final 68 : public GarbageCollected<ImportedStyleSheetClient>, 69 public ResourceClient { 70 USING_GARBAGE_COLLECTED_MIXIN(ImportedStyleSheetClient); 71 72 public: ImportedStyleSheetClient(StyleRuleImport * owner_rule)73 ImportedStyleSheetClient(StyleRuleImport* owner_rule) 74 : owner_rule_(owner_rule) {} 75 ~ImportedStyleSheetClient() override = default; NotifyFinished(Resource * resource)76 void NotifyFinished(Resource* resource) override { 77 owner_rule_->NotifyFinished(resource); 78 } Dispose()79 void Dispose() { ClearResource(); } 80 DebugName()81 String DebugName() const override { return "ImportedStyleSheetClient"; } 82 Trace(Visitor * visitor)83 void Trace(Visitor* visitor) override { 84 visitor->Trace(owner_rule_); 85 ResourceClient::Trace(visitor); 86 } 87 88 private: 89 Member<StyleRuleImport> owner_rule_; 90 }; 91 92 void NotifyFinished(Resource*); 93 94 void Dispose(); 95 96 Member<StyleSheetContents> parent_style_sheet_; 97 98 Member<ImportedStyleSheetClient> style_sheet_client_; 99 String str_href_; 100 scoped_refptr<MediaQuerySet> media_queries_; 101 Member<StyleSheetContents> style_sheet_; 102 bool loading_; 103 // Whether the style sheet that has this import rule is origin-clean: 104 // https://drafts.csswg.org/cssom-1/#concept-css-style-sheet-origin-clean-flag 105 const OriginClean origin_clean_; 106 }; 107 108 template <> 109 struct DowncastTraits<StyleRuleImport> { 110 static bool AllowFrom(const StyleRuleBase& rule) { 111 return rule.IsImportRule(); 112 } 113 }; 114 115 } // namespace blink 116 117 #endif 118