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Diffstat (limited to 'dom/html/HTMLLinkElement.h')
| -rw-r--r-- | dom/html/HTMLLinkElement.h | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/dom/html/HTMLLinkElement.h b/dom/html/HTMLLinkElement.h new file mode 100644 index 0000000000..64edde509c --- /dev/null +++ b/dom/html/HTMLLinkElement.h @@ -0,0 +1,222 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef mozilla_dom_HTMLLinkElement_h +#define mozilla_dom_HTMLLinkElement_h + +#include "mozilla/Attributes.h" +#include "mozilla/dom/HTMLDNSPrefetch.h" +#include "mozilla/dom/LinkStyle.h" +#include "mozilla/dom/Link.h" +#include "mozilla/WeakPtr.h" +#include "nsGenericHTMLElement.h" +#include "nsDOMTokenList.h" + +namespace mozilla { +class EventChainPostVisitor; +class EventChainPreVisitor; +class PreloaderBase; + +namespace dom { + +class HTMLLinkElement final : public nsGenericHTMLElement, + public LinkStyle, + public SupportsDNSPrefetch { + public: + explicit HTMLLinkElement( + already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo); + + // nsISupports + NS_DECL_ISUPPORTS_INHERITED + + // CC + NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(HTMLLinkElement, + nsGenericHTMLElement) + + NS_IMPL_FROMNODE_HTML_WITH_TAG(HTMLLinkElement, link); + NS_DECL_ADDSIZEOFEXCLUDINGTHIS + + void LinkAdded(); + void LinkRemoved(); + + // nsINode + nsresult Clone(dom::NodeInfo*, nsINode** aResult) const override; + JSObject* WrapNode(JSContext* aCx, + JS::Handle<JSObject*> aGivenProto) override; + + // nsIContent + nsresult BindToTree(BindContext&, nsINode& aParent) override; + void UnbindFromTree(bool aNullParent = true) override; + nsresult BeforeSetAttr(int32_t aNameSpaceID, nsAtom* aName, + const nsAttrValueOrString* aValue, + bool aNotify) override; + nsresult AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName, + const nsAttrValue* aValue, const nsAttrValue* aOldValue, + nsIPrincipal* aSubjectPrincipal, bool aNotify) override; + // Element + bool ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute, + const nsAString& aValue, + nsIPrincipal* aMaybeScriptedPrincipal, + nsAttrValue& aResult) override; + + void CreateAndDispatchEvent(Document* aDoc, const nsAString& aEventName); + + // WebIDL + bool Disabled() const; + void SetDisabled(bool aDisabled, ErrorResult& aRv); + + nsIURI* GetURI() { + if (!mCachedURI) { + GetURIAttr(nsGkAtoms::href, nullptr, getter_AddRefs(mCachedURI)); + } + return mCachedURI.get(); + } + + void GetHref(nsAString& aValue) { + GetURIAttr(nsGkAtoms::href, nullptr, aValue); + } + void SetHref(const nsAString& aHref, nsIPrincipal* aTriggeringPrincipal, + ErrorResult& aRv) { + SetHTMLAttr(nsGkAtoms::href, aHref, aTriggeringPrincipal, aRv); + } + void SetHref(const nsAString& aHref, ErrorResult& aRv) { + SetHTMLAttr(nsGkAtoms::href, aHref, aRv); + } + void GetCrossOrigin(nsAString& aResult) { + // Null for both missing and invalid defaults is ok, since we + // always parse to an enum value, so we don't need an invalid + // default, and we _want_ the missing default to be null. + GetEnumAttr(nsGkAtoms::crossorigin, nullptr, aResult); + } + void SetCrossOrigin(const nsAString& aCrossOrigin, ErrorResult& aError) { + SetOrRemoveNullableStringAttr(nsGkAtoms::crossorigin, aCrossOrigin, aError); + } + // nsAString for WebBrowserPersistLocalDocument + void GetRel(nsAString& aValue) { GetHTMLAttr(nsGkAtoms::rel, aValue); } + void SetRel(const nsAString& aRel, ErrorResult& aRv) { + SetHTMLAttr(nsGkAtoms::rel, aRel, aRv); + } + nsDOMTokenList* RelList(); + void GetMedia(DOMString& aValue) { GetHTMLAttr(nsGkAtoms::media, aValue); } + void SetMedia(const nsAString& aMedia, ErrorResult& aRv) { + SetHTMLAttr(nsGkAtoms::media, aMedia, aRv); + } + void GetHreflang(DOMString& aValue) { + GetHTMLAttr(nsGkAtoms::hreflang, aValue); + } + void SetHreflang(const nsAString& aHreflang, ErrorResult& aRv) { + SetHTMLAttr(nsGkAtoms::hreflang, aHreflang, aRv); + } + void GetAs(nsAString& aResult); + void SetAs(const nsAString& aAs, ErrorResult& aRv) { + SetAttr(nsGkAtoms::as, aAs, aRv); + } + + nsDOMTokenList* Sizes() { + if (!mSizes) { + mSizes = new nsDOMTokenList(this, nsGkAtoms::sizes); + } + return mSizes; + } + void GetType(nsAString& aValue) { GetHTMLAttr(nsGkAtoms::type, aValue); } + void SetType(const nsAString& aType, ErrorResult& aRv) { + SetHTMLAttr(nsGkAtoms::type, aType, aRv); + } + void GetCharset(nsAString& aValue) override { + GetHTMLAttr(nsGkAtoms::charset, aValue); + } + void SetCharset(const nsAString& aCharset, ErrorResult& aRv) { + SetHTMLAttr(nsGkAtoms::charset, aCharset, aRv); + } + void GetRev(DOMString& aValue) { GetHTMLAttr(nsGkAtoms::rev, aValue); } + void SetRev(const nsAString& aRev, ErrorResult& aRv) { + SetHTMLAttr(nsGkAtoms::rev, aRev, aRv); + } + void GetTarget(DOMString& aValue) { GetHTMLAttr(nsGkAtoms::target, aValue); } + void SetTarget(const nsAString& aTarget, ErrorResult& aRv) { + SetHTMLAttr(nsGkAtoms::target, aTarget, aRv); + } + void GetIntegrity(nsAString& aIntegrity) const { + GetHTMLAttr(nsGkAtoms::integrity, aIntegrity); + } + void SetIntegrity(const nsAString& aIntegrity, ErrorResult& aRv) { + SetHTMLAttr(nsGkAtoms::integrity, aIntegrity, aRv); + } + void SetReferrerPolicy(const nsAString& aReferrer, ErrorResult& aError) { + SetHTMLAttr(nsGkAtoms::referrerpolicy, aReferrer, aError); + } + void GetReferrerPolicy(nsAString& aReferrer) { + GetEnumAttr(nsGkAtoms::referrerpolicy, "", aReferrer); + } + void GetImageSrcset(nsAString& aImageSrcset) { + GetHTMLAttr(nsGkAtoms::imagesrcset, aImageSrcset); + } + void SetImageSrcset(const nsAString& aImageSrcset, ErrorResult& aError) { + SetHTMLAttr(nsGkAtoms::imagesrcset, aImageSrcset, aError); + } + void GetImageSizes(nsAString& aImageSizes) { + GetHTMLAttr(nsGkAtoms::imagesizes, aImageSizes); + } + void SetImageSizes(const nsAString& aImageSizes, ErrorResult& aError) { + SetHTMLAttr(nsGkAtoms::imagesizes, aImageSizes, aError); + } + + CORSMode GetCORSMode() const { + return AttrValueToCORSMode(GetParsedAttr(nsGkAtoms::crossorigin)); + } + + void NodeInfoChanged(Document* aOldDoc) final { + mCachedURI = nullptr; + nsGenericHTMLElement::NodeInfoChanged(aOldDoc); + } + + protected: + virtual ~HTMLLinkElement(); + + void GetContentPolicyMimeTypeMedia(nsAttrValue& aAsAttr, + nsContentPolicyType& aPolicyType, + nsString& aMimeType, nsAString& aMedia); + void TryDNSPrefetchOrPreconnectOrPrefetchOrPreloadOrPrerender(); + void UpdatePreload(nsAtom* aName, const nsAttrValue* aValue, + const nsAttrValue* aOldValue); + void CancelPrefetchOrPreload(); + + void StartPreload(nsContentPolicyType policyType); + void CancelPreload(); + + // Returns whether the type attribute specifies the text/css mime type for + // link elements. + static bool IsCSSMimeTypeAttributeForLinkElement( + const mozilla::dom::Element&); + + // LinkStyle + nsIContent& AsContent() final { return *this; } + const LinkStyle* AsLinkStyle() const final { return this; } + Maybe<SheetInfo> GetStyleSheetInfo() final; + + RefPtr<nsDOMTokenList> mRelList; + RefPtr<nsDOMTokenList> mSizes; + + // A weak reference to our preload is held only to cancel the preload when + // this node updates or unbounds from the tree. We want to prevent cycles, + // the preload is held alive by other means. + WeakPtr<PreloaderBase> mPreload; + + // The cached href attribute value. + nsCOMPtr<nsIURI> mCachedURI; + + // The "explicitly enabled" flag. This flag is set whenever the `disabled` + // attribute is explicitly unset, and makes alternate stylesheets not be + // disabled by default anymore. + // + // See https://github.com/whatwg/html/issues/3840#issuecomment-481034206. + bool mExplicitlyEnabled = false; +}; + +} // namespace dom +} // namespace mozilla + +#endif // mozilla_dom_HTMLLinkElement_h |