dom/html/HTMLLinkElement.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_dom_HTMLLinkElement_h
   8 #define mozilla_dom_HTMLLinkElement_h
   9
  10 #include "mozilla/Attributes.h"
  11 #include "mozilla/dom/Link.h"
  12 #include "nsGenericHTMLElement.h"
  13 #include "nsStyleLinkElement.h"
  14
  15 namespace mozilla {
  16 class EventChainPostVisitor;
  17 class EventChainPreVisitor;
  18 namespace dom {
  19
  20 class HTMLLinkElement final : public nsGenericHTMLElement,
  21                               public nsStyleLinkElement,
  22                               public Link {
  23  public:
  24   explicit HTMLLinkElement(
  25       already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
  26
  27   // nsISupports
  28   NS_DECL_ISUPPORTS_INHERITED
  29
  30   // CC
  31   NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(HTMLLinkElement,
  32                                            nsGenericHTMLElement)
  33
  34   NS_IMPL_FROMNODE_HTML_WITH_TAG(HTMLLinkElement, link);
  35   NS_DECL_ADDSIZEOFEXCLUDINGTHIS
  36
  37   void LinkAdded();
  38   void LinkRemoved();
  39
  40   // EventTarget
  41   void GetEventTargetParent(EventChainPreVisitor& aVisitor) override;
  42   MOZ_CAN_RUN_SCRIPT
  43   nsresult PostHandleEvent(EventChainPostVisitor& aVisitor) override;
  44
  45   // nsINode
  46   virtual nsresult Clone(dom::NodeInfo*, nsINode** aResult) const override;
  47   virtual JSObject* WrapNode(JSContext* aCx,
  48                              JS::Handle<JSObject*> aGivenProto) override;
  49
  50   // nsIContent
  51   virtual nsresult BindToTree(BindContext&, nsINode& aParent) override;
  52   virtual void UnbindFromTree(bool aNullParent = true) override;
  53   virtual nsresult BeforeSetAttr(int32_t aNameSpaceID, nsAtom* aName,
  54                                  const nsAttrValueOrString* aValue,
  55                                  bool aNotify) override;
  56   virtual nsresult AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
  57                                 const nsAttrValue* aValue,
  58                                 const nsAttrValue* aOldValue,
  59                                 nsIPrincipal* aSubjectPrincipal,
  60                                 bool aNotify) override;
  61   virtual bool IsLink(nsIURI** aURI) const override;
  62   virtual already_AddRefed<nsIURI> GetHrefURI() const override;
  63
  64   // Element
  65   virtual bool ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
  66                               const nsAString& aValue,
  67                               nsIPrincipal* aMaybeScriptedPrincipal,
  68                               nsAttrValue& aResult) override;
  69   virtual void GetLinkTarget(nsAString& aTarget) override;
  70   virtual EventStates IntrinsicState() const override;
  71
  72   void CreateAndDispatchEvent(Document* aDoc, const nsAString& aEventName);
  73
  74   virtual void OnDNSPrefetchDeferred() override;
  75   virtual void OnDNSPrefetchRequested() override;
  76   virtual bool HasDeferredDNSPrefetchRequest() override;
  77
  78   // WebIDL
  79   bool Disabled() const;
  80   void SetDisabled(bool aDisabled, ErrorResult& aRv);
  81
  82   void GetHref(nsAString& aValue) {
  83     GetURIAttr(nsGkAtoms::href, nullptr, aValue);
  84   }
  85   void SetHref(const nsAString& aHref, nsIPrincipal* aTriggeringPrincipal,
  86                ErrorResult& aRv) {
  87     SetHTMLAttr(nsGkAtoms::href, aHref, aTriggeringPrincipal, aRv);
  88   }
  89   void SetHref(const nsAString& aHref, ErrorResult& aRv) {
  90     SetHTMLAttr(nsGkAtoms::href, aHref, aRv);
  91   }
  92   void GetCrossOrigin(nsAString& aResult) {
  93     // Null for both missing and invalid defaults is ok, since we
  94     // always parse to an enum value, so we don't need an invalid
  95     // default, and we _want_ the missing default to be null.
  96     GetEnumAttr(nsGkAtoms::crossorigin, nullptr, aResult);
  97   }
  98   void SetCrossOrigin(const nsAString& aCrossOrigin, ErrorResult& aError) {
  99     SetOrRemoveNullableStringAttr(nsGkAtoms::crossorigin, aCrossOrigin, aError);
 100   }
 101   // nsAString for WebBrowserPersistLocalDocument
 102   void GetRel(nsAString& aValue) { GetHTMLAttr(nsGkAtoms::rel, aValue); }
 103   void SetRel(const nsAString& aRel, ErrorResult& aRv) {
 104     SetHTMLAttr(nsGkAtoms::rel, aRel, aRv);
 105   }
 106   nsDOMTokenList* RelList();
 107   void GetMedia(DOMString& aValue) { GetHTMLAttr(nsGkAtoms::media, aValue); }
 108   void SetMedia(const nsAString& aMedia, ErrorResult& aRv) {
 109     SetHTMLAttr(nsGkAtoms::media, aMedia, aRv);
 110   }
 111   void GetHreflang(DOMString& aValue) {
 112     GetHTMLAttr(nsGkAtoms::hreflang, aValue);
 113   }
 114   void SetHreflang(const nsAString& aHreflang, ErrorResult& aRv) {
 115     SetHTMLAttr(nsGkAtoms::hreflang, aHreflang, aRv);
 116   }
 117   void GetAs(nsAString& aResult);
 118   void SetAs(const nsAString& aAs, ErrorResult& aRv) {
 119     SetAttr(nsGkAtoms::as, aAs, aRv);
 120   }
 121   nsDOMTokenList* Sizes() { return GetTokenList(nsGkAtoms::sizes); }
 122   void GetType(DOMString& aValue) { GetHTMLAttr(nsGkAtoms::type, aValue); }
 123   void SetType(const nsAString& aType, ErrorResult& aRv) {
 124     SetHTMLAttr(nsGkAtoms::type, aType, aRv);
 125   }
 126   void GetCharset(nsAString& aValue) override {
 127     GetHTMLAttr(nsGkAtoms::charset, aValue);
 128   }
 129   void SetCharset(const nsAString& aCharset, ErrorResult& aRv) {
 130     SetHTMLAttr(nsGkAtoms::charset, aCharset, aRv);
 131   }
 132   void GetRev(DOMString& aValue) { GetHTMLAttr(nsGkAtoms::rev, aValue); }
 133   void SetRev(const nsAString& aRev, ErrorResult& aRv) {
 134     SetHTMLAttr(nsGkAtoms::rev, aRev, aRv);
 135   }
 136   void GetTarget(DOMString& aValue) { GetHTMLAttr(nsGkAtoms::target, aValue); }
 137   void SetTarget(const nsAString& aTarget, ErrorResult& aRv) {
 138     SetHTMLAttr(nsGkAtoms::target, aTarget, aRv);
 139   }
 140   void GetIntegrity(nsAString& aIntegrity) const {
 141     GetHTMLAttr(nsGkAtoms::integrity, aIntegrity);
 142   }
 143   void SetIntegrity(const nsAString& aIntegrity, ErrorResult& aRv) {
 144     SetHTMLAttr(nsGkAtoms::integrity, aIntegrity, aRv);
 145   }
 146   void SetReferrerPolicy(const nsAString& aReferrer, ErrorResult& aError) {
 147     SetHTMLAttr(nsGkAtoms::referrerpolicy, aReferrer, aError);
 148   }
 149   void GetReferrerPolicy(nsAString& aReferrer) {
 150     GetEnumAttr(nsGkAtoms::referrerpolicy, EmptyCString().get(), aReferrer);
 151   }
 152
 153   CORSMode GetCORSMode() const {
 154     return AttrValueToCORSMode(GetParsedAttr(nsGkAtoms::crossorigin));
 155   }
 156
 157   void NodeInfoChanged(Document* aOldDoc) final {
 158     ClearHasPendingLinkUpdate();
 159     nsGenericHTMLElement::NodeInfoChanged(aOldDoc);
 160   }
 161
 162   static bool CheckPreloadAttrs(const nsAttrValue& aAs, const nsAString& aType,
 163                                 const nsAString& aMedia, Document* aDocument);
 164
 165  protected:
 166   virtual ~HTMLLinkElement();
 167
 168   // nsStyleLinkElement
 169   Maybe<SheetInfo> GetStyleSheetInfo() final;
 170
 171   RefPtr<nsDOMTokenList> mRelList;
 172
 173   // The "explicitly enabled" flag. This flag is set whenever the `disabled`
 174   // attribute is explicitly unset, and makes alternate stylesheets not be
 175   // disabled by default anymore.
 176   //
 177   // See https://github.com/whatwg/html/issues/3840#issuecomment-481034206.
 178   bool mExplicitlyEnabled = false;
 179 };
 180
 181 }  // namespace dom
 182 }  // namespace mozilla
 183
 184 #endif  // mozilla_dom_HTMLLinkElement_h