First step of HTMLImports

Source/core/html/HTMLLinkElement.h

 /*
  * 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.
@@ skipping 11 matching lines @@
  */
 
 #ifndef HTMLLinkElement_h
 #define HTMLLinkElement_h
 
 #include "core/css/CSSStyleSheet.h"
 #include "core/dom/IconURL.h"
 #include "core/html/DOMSettableTokenList.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"
 #include "core/loader/cache/CachedResourceHandle.h"
 #include "core/loader/cache/CachedStyleSheetClient.h"
 #include "core/platform/Timer.h"
 
 namespace WebCore {
 
+class DocumentFragment;
 class HTMLLinkElement;
 class KURL;
+class LinkImport;
 
 template<typename T> class EventSender;
 typedef EventSender<HTMLLinkElement> LinkEventSender;
 
-class LinkStyle FINAL : public CachedStyleSheetClient {
+//
+// 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, CachedStyleSheetClient {
 public:
+    static PassRefPtr<LinkStyle> create(HTMLLinkElement* owner);
+
     explicit LinkStyle(HTMLLinkElement* owner);
-    ~LinkStyle();
+    virtual ~LinkStyle();
+
+    virtual Type type() const OVERRIDE { return Style; }
+    virtual void process() OVERRIDE;
+    virtual void ownerRemoved() OVERRIDE;
 
     void startLoadingDynamicSheet();
     void notifyLoadedSheetAndAllCriticalSubresources(bool errorOccurred);
     bool sheetLoaded();
 
     void setDisabledState(bool);
-    void process();
-    void ownerRemoved();
     void setSheetTitle(const String&);
 
     bool styleSheetIsLoading() const;
     bool hasSheet() const { return m_sheet; }
     bool hasLoadedSheet() const { return m_loadedSheet; }
     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(); }
@@ skipping 24 matching lines @@
     void removePendingSheet(RemovePendingSheetNotificationType = RemovePendingSheetNotifyImmediately);
     Document* document();
 
     CachedResourceHandle<CachedCSSStyleSheet> m_cachedSheet;
     RefPtr<CSSStyleSheet> m_sheet;
     DisabledState m_disabledState;
     PendingSheetType m_pendingSheetType;
     bool m_loading;
     bool m_firedLoad;
     bool m_loadedSheet;
-    HTMLLinkElement* m_owner;
 };
 
 
 class HTMLLinkElement FINAL : public HTMLElement, public LinkLoaderClient {
 public:
     static PassRefPtr<HTMLLinkElement> create(const QualifiedName&, Document*, bool createdByParser);
     virtual ~HTMLLinkElement();
 
     KURL href() const;
     String rel() const;
     String media() const { return m_media; }
     String typeValue() const { return m_type; }
     const LinkRelAttribute& relAttribute() const { return m_relAttribute; }
 
     virtual String target() const;
 
     String type() const;
 
     IconType iconType() const;
 
     // the icon size string as parsed from the HTML attribute
     String iconSizes() const;
 
-    CSSStyleSheet* sheet() const { return m_link ? m_link->sheet() : 0; }
+    CSSStyleSheet* sheet() const { return linkStyle() ? linkStyle()->sheet() : 0; }
+    DocumentFragment* import() const;
 
     bool styleSheetIsLoading() const;
 
-    bool isDisabled() const { return m_link->isDisabled(); }
-    bool isEnabledViaScript() const { return m_link->isEnabledViaScript(); }
+    bool isDisabled() const { return linkStyle() && linkStyle()->isDisabled(); }
+    bool isEnabledViaScript() const { return linkStyle() && linkStyle()->isEnabledViaScript(); }
     void setSizes(const String&);
     DOMSettableTokenList* sizes() const;
 
     void dispatchPendingEvent(LinkEventSender*);
     static void dispatchPendingLoadEvents();
 
     // From LinkLoaderClient
     virtual bool shouldLoadLink() OVERRIDE;
 
     // For LinkStyle
     bool loadLink(const String& type, const KURL& url) { return m_linkLoader.loadLink(m_relAttribute, type, url, document()); }
-    bool isAlternate() const { return m_link->isUnset() && m_relAttribute.isAlternate(); }
-    bool shouldProcessStyle() { return linkStyleToProcess(); }
+    bool isAlternate() const { return linkStyle()->isUnset() && m_relAttribute.isAlternate(); }
+    bool shouldProcessStyle() { return linkResourceToProcess() && linkStyle(); }
 
 private:
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
 
-    LinkStyle* linkStyle() const { return m_link.get(); }
-    LinkStyle* linkStyleToProcess();
+    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 sheetLoaded() OVERRIDE;
     virtual void notifyLoadedSheetAndAllCriticalSubresources(bool errorOccurred) OVERRIDE;
     virtual void startLoadingDynamicSheet() OVERRIDE;
     virtual void addSubresourceAttributeURLs(ListHashSet<KURL>&) const OVERRIDE;
     virtual void finishParsingChildren();
 
     // 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(const QualifiedName&, Document*, bool createdByParser);
 
-    OwnPtr<LinkStyle> m_link;
+    RefPtr<LinkResource> m_link;
     LinkLoader m_linkLoader;
 
     String m_type;
     String m_media;
     RefPtr<DOMSettableTokenList> m_sizes;
     LinkRelAttribute m_relAttribute;
 
     bool m_createdByParser;
     bool m_isInShadowTree;
     int m_beforeLoadRecurseCount;
 };
 
 } //namespace
 
 #endif