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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2003, 2008, 2010 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.
*
*/
#ifndef HTMLLinkElement_h
#define HTMLLinkElement_h
#include "core/css/CSSStyleSheet.h"
#include "core/dom/DOMSettableTokenList.h"
#include "core/dom/IconURL.h"
#include "core/fetch/ResourceOwner.h"
#include "core/fetch/StyleSheetResource.h"
#include "core/fetch/StyleSheetResourceClient.h"
#include "core/html/HTMLElement.h"
#include "core/html/LinkRelAttribute.h"
#include "core/html/LinkResource.h"
#include "core/loader/LinkLoader.h"
#include "core/loader/LinkLoaderClient.h"
namespace blink {
class HTMLLinkElement;
class KURL;
class LinkImport;
template<typename T> class EventSender;
typedef EventSender<HTMLLinkElement> LinkEventSender;
//
// LinkStyle handles dynaically change-able link resources, which is
// typically @rel="stylesheet".
//
// It could be @rel="shortcut icon" or soething else though. Each of
// types might better be handled by a separate class, but dynamically
// changing @rel makes it harder to move such a design so we are
// sticking current way so far.
//
class LinkStyle final : public LinkResource, ResourceOwner<StyleSheetResource> {
WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
public:
static PassOwnPtrWillBeRawPtr<LinkStyle> create(HTMLLinkElement* owner);
explicit LinkStyle(HTMLLinkElement* owner);
virtual ~LinkStyle();
virtual Type type() const override { return Style; }
virtual void process() override;
virtual void ownerRemoved() override;
virtual bool hasLoaded() const override { return m_loadedSheet; }
virtual void trace(Visitor*) override;
void startLoadingDynamicSheet();
void notifyLoadedSheetAndAllCriticalSubresources(bool errorOccurred);
bool sheetLoaded();
void setDisabledState(bool);
void setSheetTitle(const String&);
bool styleSheetIsLoading() const;
bool hasSheet() const { return m_sheet; }
bool isDisabled() const { return m_disabledState == Disabled; }
bool isEnabledViaScript() const { return m_disabledState == EnabledViaScript; }
bool isUnset() const { return m_disabledState == Unset; }
CSSStyleSheet* sheet() const { return m_sheet.get(); }
private:
// From StyleSheetResourceClient
virtual void setCSSStyleSheet(const String& href, const KURL& baseURL, const String& charset, const CSSStyleSheetResource*) override;
enum DisabledState {
Unset,
EnabledViaScript,
Disabled
};
enum PendingSheetType {
None,
NonBlocking,
Blocking
};
void clearSheet();
void addPendingSheet(PendingSheetType);
void removePendingSheet();
Document& document();
RefPtrWillBeMember<CSSStyleSheet> m_sheet;
DisabledState m_disabledState;
PendingSheetType m_pendingSheetType;
bool m_loading;
bool m_firedLoad;
bool m_loadedSheet;
};
class HTMLLinkElement final : public HTMLElement, public LinkLoaderClient {
DEFINE_WRAPPERTYPEINFO();
public:
static PassRefPtrWillBeRawPtr<HTMLLinkElement> create(Document&, bool createdByParser);
virtual ~HTMLLinkElement();
KURL href() const;
const AtomicString& rel() const;
String media() const { return m_media; }
String typeValue() const { return m_type; }
const LinkRelAttribute& relAttribute() const { return m_relAttribute; }
const AtomicString& type() const;
IconType iconType() const;
// the icon sizes as parsed from the HTML attribute
const Vector<IntSize>& iconSizes() const;
bool async() const;
CSSStyleSheet* sheet() const { return linkStyle() ? linkStyle()->sheet() : 0; }
Document* import() const;
bool styleSheetIsLoading() const;
bool isImport() const { return linkImport(); }
bool isDisabled() const { return linkStyle() && linkStyle()->isDisabled(); }
bool isEnabledViaScript() const { return linkStyle() && linkStyle()->isEnabledViaScript(); }
void setEnabledIfExitTransitionStyle(bool);
DOMSettableTokenList* sizes() const;
void dispatchPendingEvent(LinkEventSender*);
void scheduleEvent();
void dispatchEventImmediately();
static void dispatchPendingLoadEvents();
// From LinkLoaderClient
virtual bool shouldLoadLink() override;
// For LinkStyle
bool loadLink(const String& type, const KURL&);
bool isAlternate() const { return linkStyle()->isUnset() && m_relAttribute.isAlternate(); }
bool shouldProcessStyle() { return linkResourceToProcess() && linkStyle(); }
bool isCreatedByParser() const { return m_createdByParser; }
// Parse the icon size attribute into |iconSizes|, make this method public
// visible for testing purpose.
static void parseSizesAttribute(const AtomicString& value, Vector<IntSize>& iconSizes);
virtual void trace(Visitor*) override;
private:
virtual void attributeWillChange(const QualifiedName&, const AtomicString& oldValue, const AtomicString& newValue) override;
virtual void parseAttribute(const QualifiedName&, const AtomicString&) override;
LinkStyle* linkStyle() const;
LinkImport* linkImport() const;
LinkResource* linkResourceToProcess();
void process();
static void processCallback(Node*);
// From Node and subclassses
virtual InsertionNotificationRequest insertedInto(ContainerNode*) override;
virtual void removedFrom(ContainerNode*) override;
virtual bool isURLAttribute(const Attribute&) const override;
virtual bool hasLegalLinkAttribute(const QualifiedName&) const override;
virtual const QualifiedName& subResourceAttributeName() const override;
virtual bool sheetLoaded() override;
virtual void notifyLoadedSheetAndAllCriticalSubresources(bool errorOccurred) override;
virtual void startLoadingDynamicSheet() override;
virtual void finishParsingChildren() override;
// From LinkLoaderClient
virtual void linkLoaded() override;
virtual void linkLoadingErrored() override;
virtual void didStartLinkPrerender() override;
virtual void didStopLinkPrerender() override;
virtual void didSendLoadForLinkPrerender() override;
virtual void didSendDOMContentLoadedForLinkPrerender() override;
private:
HTMLLinkElement(Document&, bool createdByParser);
OwnPtrWillBeMember<LinkResource> m_link;
LinkLoader m_linkLoader;
String m_type;
String m_media;
RefPtrWillBeMember<DOMSettableTokenList> m_sizes;
Vector<IntSize> m_iconSizes;
LinkRelAttribute m_relAttribute;
bool m_createdByParser;
bool m_isInShadowTree;
};
} // namespace blink
#endif // HTMLLinkElement_h
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