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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 HTMLLinkElement;
class URL;
template<typename T> class EventSender;
typedef EventSender<HTMLLinkElement> LinkEventSender;
class HTMLLinkElement final : public HTMLElement, public CachedStyleSheetClient, public LinkLoaderClient {
public:
static Ref<HTMLLinkElement> create(const QualifiedName&, Document&, bool createdByParser);
virtual ~HTMLLinkElement();
URL href() const;
const AtomicString& rel() const;
String target() const final;
const AtomicString& 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 void setCrossOrigin(const AtomicString&);
WEBCORE_EXPORT String crossOrigin() const;
void dispatchPendingEvent(LinkEventSender*);
static void dispatchPendingLoadEvents();
WEBCORE_EXPORT DOMTokenList& relList();
private:
void parseAttribute(const QualifiedName&, const AtomicString&) final;
bool shouldLoadLink() final;
void process();
static void processCallback(Node*);
void clearSheet();
InsertionNotificationRequest insertedInto(ContainerNode&) final;
void finishedInsertingSubtree() final;
void removedFrom(ContainerNode&) final;
void initializeStyleSheet(Ref<StyleSheetContents>&&, const CachedCSSStyleSheet&);
// from CachedResourceClient
void setCSSStyleSheet(const String& href, const URL& baseURL, const String& 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;
void defaultEventHandler(Event&) final;
void handleClick(Event&);
HTMLLinkElement(const QualifiedName&, Document&, bool createdByParser);
void addSubresourceAttributeURLs(ListHashSet<URL>&) const final;
void finishParsingChildren() final;
enum PendingSheetType { Unknown, ActiveSheet, InactiveSheet };
void addPendingSheet(PendingSheetType);
void removePendingSheet();
LinkLoader m_linkLoader;
Style::Scope* m_styleScope { nullptr };
CachedResourceHandle<CachedCSSStyleSheet> m_cachedSheet;
RefPtr<CSSStyleSheet> m_sheet;
enum DisabledState {
Unset,
EnabledViaScript,
Disabled
};
String m_type;
String m_media;
std::unique_ptr<DOMTokenList> m_sizes;
DisabledState m_disabledState;
LinkRelAttribute m_relAttribute;
bool m_loading;
bool m_createdByParser;
bool m_firedLoad;
bool m_loadedResource;
bool m_isHandlingBeforeLoad { false };
PendingSheetType m_pendingSheetType;
std::unique_ptr<DOMTokenList> m_relList;
};
} //namespace
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