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SVGFontElement.h

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00001 /*
00002    Copyright (C) 2007 Eric Seidel <eric@webkit.org>
00003    Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
00004 
00005    This library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Library General Public
00007    License as published by the Free Software Foundation; either
00008    version 2 of the License, or (at your option) any later version.
00009 
00010    This library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Library General Public License for more details.
00014 
00015    You should have received a copy of the GNU Library General Public License
00016    along with this library; see the file COPYING.LIB.  If not, write to
00017    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00018    Boston, MA 02110-1301, USA.
00019  */
00020 
00021 #ifndef SVGFontElement_h
00022 #define SVGFontElement_h
00023 
00024 #if ENABLE(SVG_FONTS)
00025 #include "SVGExternalResourcesRequired.h"
00026 #include "SVGGlyphElement.h"
00027 #include "SVGGlyphMap.h"
00028 #include "SVGHKernElement.h"
00029 #include "SVGStyledElement.h"
00030 
00031 namespace WebCore {
00032 
00033     class SVGMissingGlyphElement;    
00034     class SVGFontElement : public SVGStyledElement
00035                          , public SVGExternalResourcesRequired {
00036     public:
00037         SVGFontElement(const QualifiedName&, Document*);
00038         virtual ~SVGFontElement();
00039 
00040         virtual bool rendererIsNeeded(RenderStyle*) { return false; }    
00041         virtual const SVGElement* contextElement() const { return this; }
00042 
00043         void invalidateGlyphCache();
00044 
00045         void getGlyphIdentifiersForString(const String&, Vector<SVGGlyphIdentifier>&) const;
00046 
00047         bool getHorizontalKerningPairForStringsAndGlyphs(const String& u1, const String& g1, const String& u2, const String& g2, SVGHorizontalKerningPair& kerningPair) const;
00048 
00049         SVGMissingGlyphElement* firstMissingGlyphElement() const;
00050 
00051         // KHTML ElementImpl pure virtual method
00052         virtual quint32 id() const { return SVGNames::textTag.id(); }
00053     private:
00054         void ensureGlyphCache() const;
00055 
00056         typedef Vector<SVGHorizontalKerningPair> KerningPairVector;
00057 
00058         mutable KerningPairVector m_kerningPairs;
00059         mutable SVGGlyphMap m_glyphMap;
00060         mutable bool m_isGlyphCacheValid;
00061     };
00062 
00063 } // namespace WebCore
00064 
00065 #endif // ENABLE(SVG_FONTS)
00066 #endif
00067 
00068 // vim:ts=4:noet

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