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      1 /*
      2  * Copyright (C) 2006, 2008 Nikolas Zimmermann <zimmermann (at) kde.org>
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef SVGResource_h
     27 #define SVGResource_h
     28 
     29 #if ENABLE(SVG)
     30 #include "PlatformString.h"
     31 #include "RenderObject.h"
     32 #include "StringHash.h"
     33 
     34 #include <wtf/HashMap.h>
     35 #include <wtf/HashSet.h>
     36 #include <wtf/RefCounted.h>
     37 
     38 namespace WebCore {
     39 
     40     class AtomicString;
     41     class Document;
     42     class SVGStyledElement;
     43     class TextStream;
     44 
     45     enum SVGResourceType {
     46         // Painting mode
     47         ClipperResourceType = 0,
     48         MarkerResourceType,
     49         ImageResourceType,
     50         FilterResourceType,
     51         MaskerResourceType,
     52         PaintServerResourceType,
     53 
     54         // For resource tracking we need to know how many types of resource there are
     55         _ResourceTypeCount
     56     };
     57 
     58     // The SVGResource file represent various graphics resources:
     59     // - Filter resource
     60     // - Clipper resource
     61     // - Masker resource
     62     // - Marker resource
     63     // - Pattern resource
     64     // - Linear/Radial gradient resource
     65     //
     66     // SVG creates/uses these resources.
     67 
     68     class SVGResource : public RefCounted<SVGResource> {
     69     public:
     70         virtual ~SVGResource();
     71 
     72         virtual void invalidate();
     73 
     74         void addClient(SVGStyledElement*);
     75         virtual SVGResourceType resourceType() const = 0;
     76 
     77         bool isPaintServer() const { return resourceType() == PaintServerResourceType; }
     78         bool isFilter() const { return resourceType() == FilterResourceType; }
     79         bool isClipper() const { return resourceType() == ClipperResourceType; }
     80         bool isMarker() const { return resourceType() == MarkerResourceType; }
     81         bool isMasker() const { return resourceType() == MaskerResourceType; }
     82 
     83         virtual TextStream& externalRepresentation(TextStream&) const;
     84 
     85         static void invalidateClients(HashSet<SVGStyledElement*>);
     86         static void removeClient(SVGStyledElement*);
     87 
     88     protected:
     89         SVGResource();
     90 
     91     private:
     92         HashSet<SVGStyledElement*> m_clients;
     93     };
     94 
     95     SVGResource* getResourceById(Document*, const AtomicString&, const RenderObject*);
     96 
     97     TextStream& operator<<(TextStream&, const SVGResource&);
     98 
     99 } // namespace WebCore
    100 
    101 #endif
    102 #endif // SVGResource_h
    103