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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2003-2017 Apple Inc. All rights reserved.
* Copyright (C) 2011 Google 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.
*
*/
#pragma once
#include "CSSStyleSheet.h"
#include "CachedStyleSheetClient.h"
#include "CachedResourceHandle.h"
#include "DOMTokenList.h"
#include "HTMLElement.h"
#include "LinkLoader.h"
#include "LinkLoaderClient.h"
#include "LinkRelAttribute.h"
namespace WebCore {
class DOMTokenList;
class ExpectIdTargetObserver;
class HTMLLinkElement;
class Page;
struct MediaQueryParserContext;
enum class RequestPriority : uint8_t;
template<typename T, typename Counter> class EventSender;
using LinkEventSender = EventSender<HTMLLinkElement, WeakPtrImplWithEventTargetData>;
class HTMLLinkElement final : public HTMLElement, public CachedStyleSheetClient, public LinkLoaderClient {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(HTMLLinkElement);
WTF_OVERRIDE_DELETE_FOR_CHECKED_PTR(HTMLLinkElement);
public:
USING_CAN_MAKE_WEAKPTR(HTMLElement);
static Ref<HTMLLinkElement> create(const QualifiedName&, Document&, bool createdByParser);
virtual ~HTMLLinkElement();
URL href() const;
WEBCORE_EXPORT const AtomString& rel() const;
#if ENABLE(WEB_PAGE_SPATIAL_BACKDROP)
URL environmentMap() const;
bool isSpatialBackdrop() const { return m_relAttribute.isSpatialBackdrop; }
#endif
AtomString target() const final;
const AtomString& type() const;
std::optional<LinkIconType> iconType() const;
CSSStyleSheet* sheet() const { return m_sheet.get(); }
bool styleSheetIsLoading() const;
bool isDisabled() const { return m_disabledState == Disabled; }
bool isEnabledViaScript() const { return m_disabledState == EnabledViaScript; }
DOMTokenList& sizes();
WEBCORE_EXPORT bool mediaAttributeMatches() const;
WEBCORE_EXPORT void setCrossOrigin(const AtomString&);
WEBCORE_EXPORT String crossOrigin() const;
WEBCORE_EXPORT void setAs(const AtomString&);
WEBCORE_EXPORT String as() const;
void dispatchPendingEvent(LinkEventSender*, const AtomString& eventType);
static void dispatchPendingLoadEvents(Page*);
WEBCORE_EXPORT DOMTokenList& relList();
WEBCORE_EXPORT DOMTokenList& blocking();
#if ENABLE(APPLICATION_MANIFEST)
bool isApplicationManifest() const { return m_relAttribute.isApplicationManifest; }
#endif
void allowPrefetchLoadAndErrorForTesting() { m_allowPrefetchLoadAndErrorForTesting = true; }
void setReferrerPolicyForBindings(const AtomString&);
String referrerPolicyForBindings() const;
ReferrerPolicy referrerPolicy() const;
void setFetchPriorityForBindings(const AtomString&);
String fetchPriorityForBindings() const;
RequestPriority fetchPriority() const;
// If element is specified, checks if that Element satisfies the link.
// Otherwise checks if any Element in the tree does.
void processInternalResourceLink(Element* = nullptr);
private:
void attributeChanged(const QualifiedName&, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason) final;
bool shouldLoadLink() final;
void process();
static void processCallback(Node*);
void clearSheet();
void potentiallyBlockRendering();
void unblockRendering();
bool isImplicitlyPotentiallyRenderBlocking() const;
InsertedIntoAncestorResult insertedIntoAncestor(InsertionType, ContainerNode&) final;
void didFinishInsertingNode() final;
void removedFromAncestor(RemovalType, ContainerNode&) final;
void initializeStyleSheet(Ref<StyleSheetContents>&&, const CachedCSSStyleSheet&, MediaQueryParserContext);
// from CachedResourceClient
void setCSSStyleSheet(const String& href, const URL& baseURL, ASCIILiteral charset, const CachedCSSStyleSheet*) final;
bool sheetLoaded() final;
void notifyLoadedSheetAndAllCriticalSubresources(bool errorOccurred) final;
void startLoadingDynamicSheet() final;
void linkLoaded() final;
void linkLoadingErrored() final;
bool isAlternate() const { return m_disabledState == Unset && m_relAttribute.isAlternate; }
void setDisabledState(bool);
bool isURLAttribute(const Attribute&) const final;
HTMLLinkElement(const QualifiedName&, Document&, bool createdByParser);
void addSubresourceAttributeURLs(ListHashSet<URL>&) const final;
void finishParsingChildren() final;
String debugDescription() const final;
enum class PendingSheetType : uint8_t { Unknown, Active, Inactive };
void addPendingSheet(PendingSheetType);
void removePendingSheet();
LinkLoader m_linkLoader;
Style::Scope* m_styleScope { nullptr };
CachedResourceHandle<CachedCSSStyleSheet> m_cachedSheet;
RefPtr<CSSStyleSheet> m_sheet;
enum DisabledState : uint8_t {
Unset,
EnabledViaScript,
Disabled
};
String m_type;
String m_media;
String m_integrityMetadataForPendingSheetRequest;
URL m_url;
#if ENABLE(WEB_PAGE_SPATIAL_BACKDROP)
URL m_environmentMapURL;
#endif
std::unique_ptr<DOMTokenList> m_sizes;
std::unique_ptr<DOMTokenList> m_relList;
std::unique_ptr<DOMTokenList> m_blockingList;
std::unique_ptr<ExpectIdTargetObserver> m_expectIdTargetObserver;
DisabledState m_disabledState;
LinkRelAttribute m_relAttribute;
bool m_loading : 1;
bool m_createdByParser : 1;
bool m_loadedResource : 1;
bool m_isHandlingBeforeLoad : 1;
bool m_allowPrefetchLoadAndErrorForTesting : 1;
bool m_isRenderBlocking : 1 { false };
PendingSheetType m_pendingSheetType;
};
}
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