File indexing completed on 2024-04-28 15:24:33

0001 /*
0002    Copyright (C) 2007 Eric Seidel <eric@webkit.org>
0003    Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
0004 
0005    This library is free software; you can redistribute it and/or
0006    modify it under the terms of the GNU Library General Public
0007    License as published by the Free Software Foundation; either
0008    version 2 of the License, or (at your option) any later version.
0009 
0010    This library is distributed in the hope that it will be useful,
0011    but WITHOUT ANY WARRANTY; without even the implied warranty of
0012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
0013    Library General Public License for more details.
0014 
0015    You should have received a copy of the GNU Library General Public License
0016    along with this library; see the file COPYING.LIB.  If not, write to
0017    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
0018    Boston, MA 02110-1301, USA.
0019  */
0020 
0021 #ifndef SVGFontElement_h
0022 #define SVGFontElement_h
0023 
0024 #if ENABLE(SVG_FONTS)
0025 #include "SVGExternalResourcesRequired.h"
0026 #include "SVGGlyphElement.h"
0027 #include "SVGGlyphMap.h"
0028 #include "SVGHKernElement.h"
0029 #include "SVGStyledElement.h"
0030 
0031 namespace WebCore
0032 {
0033 
0034 class SVGMissingGlyphElement;
0035 class SVGFontElement : public SVGStyledElement
0036     , public SVGExternalResourcesRequired
0037 {
0038 public:
0039     SVGFontElement(const QualifiedName &, Document *);
0040     virtual ~SVGFontElement();
0041 
0042     bool rendererIsNeeded(RenderStyle *) override
0043     {
0044         return false;
0045     }
0046     const SVGElement *contextElement() const override
0047     {
0048         return this;
0049     }
0050 
0051     void invalidateGlyphCache();
0052 
0053     void getGlyphIdentifiersForString(const String &, Vector<SVGGlyphIdentifier> &) const;
0054 
0055     bool getHorizontalKerningPairForStringsAndGlyphs(const String &u1, const String &g1, const String &u2, const String &g2, SVGHorizontalKerningPair &kerningPair) const;
0056 
0057     SVGMissingGlyphElement *firstMissingGlyphElement() const;
0058 
0059     // KHTML ElementImpl pure virtual method
0060     quint32 id() const override
0061     {
0062         return SVGNames::textTag.id();
0063     }
0064 private:
0065     void ensureGlyphCache() const;
0066 
0067     typedef Vector<SVGHorizontalKerningPair> KerningPairVector;
0068 
0069     mutable KerningPairVector m_kerningPairs;
0070     mutable SVGGlyphMap m_glyphMap;
0071     mutable bool m_isGlyphCacheValid;
0072 };
0073 
0074 } // namespace WebCore
0075 
0076 #endif // ENABLE(SVG_FONTS)
0077 #endif
0078