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      1 /*
      2  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
      3  *
      4  * This library is free software; you can redistribute it and/or
      5  * modify it under the terms of the GNU Library General Public
      6  * License as published by the Free Software Foundation; either
      7  * version 2 of the License, or (at your option) any later version.
      8  *
      9  * This library is distributed in the hope that it will be useful,
     10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12  * Library General Public License for more details.
     13  *
     14  * You should have received a copy of the GNU Library General Public License
     15  * along with this library; see the file COPYING.LIB.  If not, write to
     16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     17  * Boston, MA 02110-1301, USA.
     18  */
     19 
     20 #ifndef RenderSVGResourceContainer_h
     21 #define RenderSVGResourceContainer_h
     22 
     23 #if ENABLE(SVG)
     24 #include "RenderSVGHiddenContainer.h"
     25 #include "RenderSVGResource.h"
     26 
     27 namespace WebCore {
     28 
     29 class RenderSVGResourceContainer : public RenderSVGHiddenContainer,
     30                                    public RenderSVGResource {
     31 public:
     32     RenderSVGResourceContainer(SVGStyledElement*);
     33     virtual ~RenderSVGResourceContainer();
     34 
     35     virtual void layout();
     36     virtual void destroy();
     37     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
     38 
     39     virtual bool isSVGResourceContainer() const { return true; }
     40     virtual RenderSVGResourceContainer* toRenderSVGResourceContainer() { return this; }
     41 
     42     static AffineTransform transformOnNonScalingStroke(RenderObject*, const AffineTransform& resourceTransform);
     43 
     44     void idChanged();
     45 
     46 protected:
     47     enum InvalidationMode {
     48         LayoutAndBoundariesInvalidation,
     49         BoundariesInvalidation,
     50         RepaintInvalidation,
     51         ParentOnlyInvalidation
     52     };
     53 
     54     // Used from the invalidateClient/invalidateClients methods from classes, inheriting from us.
     55     void markAllClientsForInvalidation(InvalidationMode);
     56     void markClientForInvalidation(RenderObject*, InvalidationMode);
     57 
     58 private:
     59     friend class SVGResourcesCache;
     60     void addClient(RenderObject*);
     61     void removeClient(RenderObject*);
     62 
     63 private:
     64     void registerResource();
     65 
     66     AtomicString m_id;
     67     bool m_registered;
     68     HashSet<RenderObject*> m_clients;
     69 };
     70 
     71 inline RenderSVGResourceContainer* getRenderSVGResourceContainerById(Document* document, const AtomicString& id)
     72 {
     73     if (id.isEmpty())
     74         return 0;
     75 
     76     if (RenderSVGResourceContainer* renderResource = document->accessSVGExtensions()->resourceById(id))
     77         return renderResource;
     78 
     79     return 0;
     80 }
     81 
     82 template<typename Renderer>
     83 Renderer* getRenderSVGResourceById(Document* document, const AtomicString& id)
     84 {
     85     if (RenderSVGResourceContainer* container = getRenderSVGResourceContainerById(document, id))
     86         return container->cast<Renderer>();
     87 
     88     return 0;
     89 }
     90 
     91 }
     92 
     93 #endif
     94 #endif
     95