diff -r 000000000000 -r 4f2f89ce4247 WebCore/svg/SVGUseElement.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/svg/SVGUseElement.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,125 @@
+/*
+    Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
+                  2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
+
+    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 SVGUseElement_h
+#define SVGUseElement_h
+
+#if ENABLE(SVG)
+#include "SVGExternalResourcesRequired.h"
+#include "SVGLangSpace.h"
+#include "SVGStyledTransformableElement.h"
+#include "SVGTests.h"
+#include "SVGURIReference.h"
+
+namespace WebCore {
+
+    class SVGElementInstance;
+    class SVGLength;
+    class SVGShadowTreeRootElement;
+
+    class SVGUseElement : public SVGStyledTransformableElement,
+                          public SVGTests,
+                          public SVGLangSpace,
+                          public SVGExternalResourcesRequired,
+                          public SVGURIReference {
+    public:
+        SVGUseElement(const QualifiedName&, Document*);
+        virtual ~SVGUseElement();
+
+        SVGElementInstance* instanceRoot() const;
+        SVGElementInstance* animatedInstanceRoot() const;
+
+        virtual bool isValid() const { return SVGTests::isValid(); }
+
+        virtual void insertedIntoDocument();
+        virtual void removedFromDocument();
+        virtual void buildPendingResource();
+
+        virtual void parseMappedAttribute(Attribute*);
+        virtual void svgAttributeChanged(const QualifiedName&);
+        virtual void synchronizeProperty(const QualifiedName&);
+
+        virtual void recalcStyle(StyleChange = NoChange);
+        virtual RenderObject* createRenderer(RenderArena*, RenderStyle*);
+        virtual void attach();
+        virtual void detach();
+
+        virtual Path toClipPath() const;
+        RenderObject* rendererClipChild() const;
+
+        static void removeDisallowedElementsFromSubtree(Node* element);
+        SVGElementInstance* instanceForShadowTreeElement(Node* element) const;
+        void invalidateShadowTree();
+
+        void setUpdatesBlocked(bool blocked) { m_updatesBlocked = blocked; }
+
+    private:
+        friend class RenderSVGShadowTreeRootContainer;
+        bool isPendingResource() const { return m_isPendingResource; }
+        void buildShadowAndInstanceTree(SVGShadowTreeRootElement*);
+
+    private:
+        virtual bool selfHasRelativeLengths() const;
+
+        DECLARE_ANIMATED_PROPERTY(SVGUseElement, SVGNames::xAttr, SVGLength, X, x)
+        DECLARE_ANIMATED_PROPERTY(SVGUseElement, SVGNames::yAttr, SVGLength, Y, y)
+        DECLARE_ANIMATED_PROPERTY(SVGUseElement, SVGNames::widthAttr, SVGLength, Width, width)
+        DECLARE_ANIMATED_PROPERTY(SVGUseElement, SVGNames::heightAttr, SVGLength, Height, height)
+
+        // SVGURIReference
+        DECLARE_ANIMATED_PROPERTY(SVGUseElement, XLinkNames::hrefAttr, String, Href, href)
+
+        // SVGExternalResourcesRequired
+        DECLARE_ANIMATED_PROPERTY(SVGUseElement, SVGNames::externalResourcesRequiredAttr, bool, ExternalResourcesRequired, externalResourcesRequired)
+
+    private:
+        // Instance tree handling
+        void buildInstanceTree(SVGElement* target, SVGElementInstance* targetInstance, bool& foundCycle);
+        void handleDeepUseReferencing(SVGUseElement* use, SVGElementInstance* targetInstance, bool& foundCycle);
+
+        // Shadow tree handling
+        void buildShadowTree(SVGShadowTreeRootElement*, SVGElement* target, SVGElementInstance* targetInstance);
+
+#if ENABLE(SVG) && ENABLE(SVG_USE)
+        void expandUseElementsInShadowTree(SVGShadowTreeRootElement*, Node* element);
+        void expandSymbolElementsInShadowTree(SVGShadowTreeRootElement*, Node* element);
+#endif
+
+        // "Tree connector" 
+        void associateInstancesWithShadowTreeElements(Node* target, SVGElementInstance* targetInstance);
+        SVGElementInstance* instanceForShadowTreeElement(Node* element, SVGElementInstance* instance) const;
+
+        void transferUseAttributesToReplacedElement(SVGElement* from, SVGElement* to) const;
+        void transferEventListenersToShadowTree(SVGElementInstance* target);
+
+        void updateContainerOffsets();
+        void updateContainerSizes();
+
+        bool m_updatesBlocked;
+        bool m_isPendingResource;
+        bool m_needsShadowTreeRecreation;
+        String m_resourceId;
+        RefPtr<SVGElementInstance> m_targetElementInstance;
+    };
+
+}
+
+#endif
+#endif