File indexing completed on 2024-04-21 11:30:57

 /*
     Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
 
     This file is part of the KDE project
 
     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 SVGElementInstance_h
 #define SVGElementInstance_h
 
 #if ENABLE(SVG)
 
 /*#include "EventTarget.h"*/
 #include "Document.h" //khtml
 
 #include <wtf/RefPtr.h>
 #include <wtf/PassRefPtr.h>
 
 namespace WebCore
 {
 class SVGElement;
 class SVGUseElement;
 class SVGElementInstanceList;
 
 class SVGElementInstance /*: public EventTarget*/
 {
 public:
     SVGElementInstance(SVGUseElement *, PassRefPtr<SVGElement> originalElement);
     virtual ~SVGElementInstance();
 
     // 'SVGElementInstance' functions
     SVGElement *correspondingElement() const;
     SVGUseElement *correspondingUseElement() const;
 
     SVGElementInstance *parentNode() const;
     PassRefPtr<SVGElementInstanceList> childNodes();
 
     SVGElementInstance *previousSibling() const;
     SVGElementInstance *nextSibling() const;
 
     SVGElementInstance *firstChild() const;
     SVGElementInstance *lastChild() const;
 
     // Internal usage only!
     SVGElement *shadowTreeElement() const;
     void setShadowTreeElement(SVGElement *);
 
     // Model the TreeShared concept, integrated within EventTarget inheritance.
     virtual void refEventTarget()
     {
         ++m_refCount;
     }
     virtual void derefEventTarget()
     {
         if (--m_refCount <= 0 && !m_parent) {
             delete this;
         }
     }
     // khtml compat
     virtual void ref()
     {
         refEventTarget();
     }
     virtual void deref()
     {
         derefEventTarget();
     }
 
     bool hasOneRef()
     {
         return m_refCount == 1;
     }
     int refCount() const
     {
         return m_refCount;
     }
 
     void setParent(SVGElementInstance *parent)
     {
         m_parent = parent;
     }
     SVGElementInstance *parent() const
     {
         return m_parent;
     }
 
     // SVGElementInstance supports both toSVGElementInstance and toNode since so much mouse handling code depends on toNode returning a valid node.
     virtual EventTargetNode *toNode();
     virtual SVGElementInstance *toSVGElementInstance();
 
     virtual void addEventListener(const AtomicString &eventType, PassRefPtr<EventListener>, bool useCapture);
     virtual void removeEventListener(const AtomicString &eventType, EventListener *, bool useCapture);
     virtual bool dispatchEvent(PassRefPtr<Event>, ExceptionCode &, bool tempEvent = false);
 
 private:
     SVGElementInstance(const SVGElementInstance &);
     SVGElementInstance &operator=(const SVGElementInstance &);
 
 private: // Helper methods
     friend class SVGUseElement;
     void appendChild(PassRefPtr<SVGElementInstance> child);
 
     friend class SVGStyledElement;
     void updateInstance(SVGElement *);
 
 private:
     int m_refCount;
     SVGElementInstance *m_parent;
 
     SVGUseElement *m_useElement;
     RefPtr<SVGElement> m_element;
     SVGElement *m_shadowTreeElement;
 
     SVGElementInstance *m_previousSibling;
     SVGElementInstance *m_nextSibling;
 
     SVGElementInstance *m_firstChild;
     SVGElementInstance *m_lastChild;
 };
 
 } // namespace WebCore
 
 #endif // ENABLE(SVG)
 #endif