1 /* 2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org) 3 * (C) 1999 Antti Koivisto (koivisto@kde.org) 4 * Copyright (C) 2003, 2008, 2010 Apple Inc. All rights reserved. 5 * Copyright (C) 2011 Google Inc. All rights reserved. 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Library General Public 9 * License as published by the Free Software Foundation; either 10 * version 2 of the License, or (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Library General Public License for more details. 16 * 17 * You should have received a copy of the GNU Library General Public License 18 * along with this library; see the file COPYING.LIB. If not, write to 19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 20 * Boston, MA 02110-1301, USA. 21 * 22 */ 23 24 #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_HTML_HTML_LINK_ELEMENT_H_ 25 #define THIRD_PARTY_BLINK_RENDERER_CORE_HTML_HTML_LINK_ELEMENT_H_ 26 27 #include <memory> 28 29 #include "base/single_thread_task_runner.h" 30 #include "third_party/blink/renderer/core/core_export.h" 31 #include "third_party/blink/renderer/core/dom/create_element_flags.h" 32 #include "third_party/blink/renderer/core/dom/dom_token_list.h" 33 #include "third_party/blink/renderer/core/dom/increment_load_event_delay_count.h" 34 #include "third_party/blink/renderer/core/html/html_element.h" 35 #include "third_party/blink/renderer/core/html/link_rel_attribute.h" 36 #include "third_party/blink/renderer/core/html/link_resource.h" 37 #include "third_party/blink/renderer/core/html/link_style.h" 38 #include "third_party/blink/renderer/core/html/rel_list.h" 39 #include "third_party/blink/renderer/core/loader/link_loader_client.h" 40 #include "third_party/blink/renderer/platform/loader/fetch/fetch_parameters.h" 41 #include "third_party/blink/renderer/platform/wtf/hash_set.h" 42 43 namespace blink { 44 45 class KURL; 46 class LinkImport; 47 class LinkLoader; 48 struct LinkLoadParameters; 49 50 class CORE_EXPORT HTMLLinkElement final : public HTMLElement, 51 public LinkLoaderClient { 52 DEFINE_WRAPPERTYPEINFO(); 53 54 public: 55 HTMLLinkElement(Document&, const CreateElementFlags); 56 ~HTMLLinkElement() override; 57 58 KURL Href() const; 59 const AtomicString& Rel() const; Media()60 String Media() const { return media_; } TypeValue()61 String TypeValue() const { return type_; } AsValue()62 String AsValue() const { return as_; } IntegrityValue()63 String IntegrityValue() const { return integrity_; } ImportanceValue()64 String ImportanceValue() const { return importance_; } GetReferrerPolicy()65 network::mojom::ReferrerPolicy GetReferrerPolicy() const { 66 return referrer_policy_; 67 } RelAttribute()68 const LinkRelAttribute& RelAttribute() const { return rel_attribute_; } relList()69 DOMTokenList& relList() const { 70 return static_cast<DOMTokenList&>(*rel_list_); 71 } Scope()72 String Scope() const { return scope_; } 73 74 const AtomicString& GetType() const; 75 76 mojom::blink::FaviconIconType GetIconType() const; 77 78 // the icon sizes as parsed from the HTML attribute 79 const Vector<gfx::Size>& IconSizes() const; 80 81 bool Async() const; 82 sheet()83 CSSStyleSheet* sheet() const { 84 return GetLinkStyle() ? GetLinkStyle()->Sheet() : nullptr; 85 } 86 Document* import() const; 87 88 bool StyleSheetIsLoading() const; 89 IsImport()90 bool IsImport() const { return GetLinkImport(); } IsDisabled()91 bool IsDisabled() const { 92 return GetLinkStyle() && GetLinkStyle()->IsDisabled(); 93 } IsEnabledViaScript()94 bool IsEnabledViaScript() const { 95 return GetLinkStyle() && GetLinkStyle()->IsEnabledViaScript(); 96 } 97 98 DOMTokenList* sizes() const; 99 100 // IDL method. 101 DOMTokenList* resources() const; 102 ValidResourceUrls()103 const HashSet<KURL>& ValidResourceUrls() const { 104 return valid_resource_urls_; 105 } 106 107 void ScheduleEvent(); 108 109 // From LinkLoaderClient 110 bool ShouldLoadLink() override; 111 bool IsLinkCreatedByParser() override; 112 113 // For LinkStyle 114 bool LoadLink(const LinkLoadParameters&); 115 void LoadStylesheet(const LinkLoadParameters&, 116 const WTF::TextEncoding&, 117 FetchParameters::DeferOption, 118 ResourceClient*); IsAlternate()119 bool IsAlternate() const { 120 // TODO(crbug.com/1087043): Remove this if() condition once the feature has 121 // landed and no compat issues are reported. 122 bool not_explicitly_enabled = 123 !GetLinkStyle()->IsExplicitlyEnabled() || 124 !RuntimeEnabledFeatures::LinkDisabledNewSpecBehaviorEnabled( 125 GetExecutionContext()); 126 return GetLinkStyle()->IsUnset() && rel_attribute_.IsAlternate() && 127 not_explicitly_enabled; 128 } ShouldProcessStyle()129 bool ShouldProcessStyle() { 130 return LinkResourceToProcess() && GetLinkStyle(); 131 } IsCreatedByParser()132 bool IsCreatedByParser() const { return created_by_parser_; } 133 134 void Trace(Visitor*) const override; 135 136 private: 137 LinkStyle* GetLinkStyle() const; 138 LinkImport* GetLinkImport() const; 139 LinkResource* LinkResourceToProcess(); 140 141 void Process(); 142 static void ProcessCallback(Node*); 143 144 // Always call this asynchronously because this can cause synchronous 145 // Document load event and JavaScript execution. 146 void DispatchPendingEvent(std::unique_ptr<IncrementLoadEventDelayCount>); 147 148 // From Node and subclassses 149 void ParseAttribute(const AttributeModificationParams&) override; 150 InsertionNotificationRequest InsertedInto(ContainerNode&) override; 151 void RemovedFrom(ContainerNode&) override; 152 bool IsURLAttribute(const Attribute&) const override; 153 bool HasLegalLinkAttribute(const QualifiedName&) const override; 154 const QualifiedName& SubResourceAttributeName() const override; 155 bool SheetLoaded() override; 156 void NotifyLoadedSheetAndAllCriticalSubresources( 157 LoadedSheetErrorStatus) override; 158 void StartLoadingDynamicSheet() override; 159 void FinishParsingChildren() override; 160 bool HasActivationBehavior() const override; 161 162 // From LinkLoaderClient 163 void LinkLoaded() override; 164 void LinkLoadingErrored() override; 165 void DidStartLinkPrerender() override; 166 void DidStopLinkPrerender() override; 167 void DidSendLoadForLinkPrerender() override; 168 void DidSendDOMContentLoadedForLinkPrerender() override; 169 scoped_refptr<base::SingleThreadTaskRunner> GetLoadingTaskRunner() override; 170 171 Member<LinkResource> link_; 172 Member<LinkLoader> link_loader_; 173 174 String type_; 175 String as_; 176 String media_; 177 String integrity_; 178 String importance_; 179 network::mojom::ReferrerPolicy referrer_policy_; 180 Member<DOMTokenList> sizes_; 181 Vector<gfx::Size> icon_sizes_; 182 Member<RelList> rel_list_; 183 LinkRelAttribute rel_attribute_; 184 String scope_; 185 Member<DOMTokenList> resources_; 186 HashSet<KURL> valid_resource_urls_; 187 188 bool created_by_parser_; 189 }; 190 191 } // namespace blink 192 193 #endif // THIRD_PARTY_BLINK_RENDERER_CORE_HTML_HTML_LINK_ELEMENT_H_ 194