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KHTML

SVGUseElement.h

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00001 /*
00002     Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
00003                   2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
00004 
00005     This file is part of the KDE project
00006 
00007     This library is free software; you can redistribute it and/or
00008     modify it under the terms of the GNU Library General Public
00009     License as published by the Free Software Foundation; either
00010     version 2 of the License, or (at your option) any later version.
00011 
00012     This library is distributed in the hope that it will be useful,
00013     but WITHOUT ANY WARRANTY; without even the implied warranty of
00014     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015     Library General Public License for more details.
00016 
00017     You should have received a copy of the GNU Library General Public License
00018     along with this library; see the file COPYING.LIB.  If not, write to
00019     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00020     Boston, MA 02110-1301, USA.
00021 */
00022 
00023 #ifndef SVGUseElement_h
00024 #define SVGUseElement_h
00025 
00026 #if ENABLE(SVG)
00027 #include "SVGExternalResourcesRequired.h"
00028 #include "SVGLangSpace.h"
00029 #include "SVGStyledTransformableElement.h"
00030 #include "SVGTests.h"
00031 #include "SVGURIReference.h"
00032 
00033 namespace WebCore {
00034 
00035     class SVGElementInstance;
00036     class SVGLength;
00037 
00038     class SVGUseElement : public SVGStyledTransformableElement,
00039                           public SVGTests,
00040                           public SVGLangSpace,
00041                           public SVGExternalResourcesRequired,
00042                           public SVGURIReference {
00043     public:
00044         SVGUseElement(const QualifiedName&, Document*);
00045         virtual ~SVGUseElement();
00046 
00047         SVGElementInstance* instanceRoot() const;
00048         SVGElementInstance* animatedInstanceRoot() const;
00049 
00050         virtual bool isValid() const { return SVGTests::isValid(); }
00051 
00052         virtual void insertedIntoDocument();
00053         virtual void removedFromDocument();
00054         virtual void buildPendingResource();
00055 
00056         virtual void parseMappedAttribute(MappedAttribute*);
00057         virtual void childrenChanged(bool changedByParser = false, Node* beforeChange = 0, Node* afterChange = 0, int childCountDelta = 0);
00058 
00059         virtual void svgAttributeChanged(const QualifiedName&);
00060         virtual void recalcStyle(StyleChange = NoChange);
00061 
00062         virtual RenderObject* createRenderer(RenderArena*, RenderStyle*);
00063         virtual void attach();
00064         virtual void detach();
00065 
00066         virtual Path toClipPath() const;
00067 
00068         static void removeDisallowedElementsFromSubtree(Node* element);
00069 
00070         // KHTML ElementImpl pure virtual method
00071         virtual quint32 id() const { return SVGNames::useTag.id(); }
00072     protected:
00073         virtual const SVGElement* contextElement() const { return this; }
00074 
00075     private:
00076         ANIMATED_PROPERTY_FORWARD_DECLARATIONS(SVGExternalResourcesRequired, bool, ExternalResourcesRequired, externalResourcesRequired)
00077         ANIMATED_PROPERTY_FORWARD_DECLARATIONS(SVGURIReference, String, Href, href)
00078 
00079         ANIMATED_PROPERTY_DECLARATIONS(SVGUseElement, SVGLength, SVGLength, X, x)
00080         ANIMATED_PROPERTY_DECLARATIONS(SVGUseElement, SVGLength, SVGLength, Y, y)
00081         ANIMATED_PROPERTY_DECLARATIONS(SVGUseElement, SVGLength, SVGLength, Width, width)
00082         ANIMATED_PROPERTY_DECLARATIONS(SVGUseElement, SVGLength, SVGLength, Height, height)
00083 
00084     private:
00085         friend class SVGElement;
00086         SVGElementInstance* instanceForShadowTreeElement(Node* element) const;
00087 
00088     private:
00089         // Instance tree handling
00090         void buildInstanceTree(SVGElement* target, SVGElementInstance* targetInstance, bool& foundCycle);
00091         void handleDeepUseReferencing(SVGElement* use, SVGElementInstance* targetInstance, bool& foundCycle);
00092 
00093         // Shadow tree handling
00094         PassRefPtr<SVGSVGElement> buildShadowTreeForSymbolTag(SVGElement* target, SVGElementInstance* targetInstance);
00095         void alterShadowTreeForSVGTag(SVGElement* target);
00096 
00097         void buildShadowTree(SVGElement* target, SVGElementInstance* targetInstance);
00098 
00099 #if ENABLE(SVG) && ENABLE(SVG_USE)
00100         void expandUseElementsInShadowTree(Node* element);
00101         void expandSymbolElementsInShadowTree(Node* element);
00102 #endif
00103 
00104         void attachShadowTree();
00105 
00106         // "Tree connector" 
00107         void associateInstancesWithShadowTreeElements(Node* target, SVGElementInstance* targetInstance);
00108 
00109         SVGElementInstance* instanceForShadowTreeElement(Node* element, SVGElementInstance* instance) const;
00110         void transferUseAttributesToReplacedElement(SVGElement* from, SVGElement* to) const;
00111 
00112         RefPtr<SVGElement> m_shadowTreeRootElement;
00113         RefPtr<SVGElementInstance> m_targetElementInstance;
00114     };
00115 
00116 } // namespace WebCore
00117 
00118 #endif // ENABLE(SVG)
00119 #endif

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