text: /*
   * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
   * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
   * Copyright (C) Research In Motion Limited 2010. All rights reserved.
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Library General Public
   * License as published by the Free Software Foundation; either
   * version 2 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Library General Public License for more details.
   *
   * You should have received a copy of the GNU Library General Public License
   * along with this library; see the file COPYING.LIB.  If not, write to
   * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   * Boston, MA 02110-1301, USA.
   */
  
  #ifndef SVGFontElement_h
  #define SVGFontElement_h
  
  #if ENABLE(SVG_FONTS)
  #include "core/SVGNames.h"
  #include "core/svg/SVGAnimatedBoolean.h"
  #include "core/svg/SVGElement.h"
  #include "core/svg/SVGGlyphMap.h"
  #include "core/svg/SVGParserUtilities.h"
  
  namespace WebCore {
  
  // Describe an SVG <hkern>/<vkern> element
  struct SVGKerningPair {
      float kerning;
      UnicodeRanges unicodeRange1;
      UnicodeRanges unicodeRange2;
      HashSet<String> unicodeName1;
      HashSet<String> unicodeName2;
      HashSet<String> glyphName1;
      HashSet<String> glyphName2;
  
      SVGKerningPair()
          : kerning(0)
      {
      }
  };
  
  typedef unsigned KerningPairKey;
  typedef Vector<SVGKerningPair> KerningPairVector;
  typedef HashMap<KerningPairKey, float> KerningTable;
  
  class SVGFontElement FINAL : public SVGElement {
  public:
      DECLARE_NODE_FACTORY(SVGFontElement);
  
      void invalidateGlyphCache();
      void collectGlyphsForString(const String&, Vector<SVGGlyph>&);
      void collectGlyphsForAltGlyphReference(const String&, Vector<SVGGlyph>&);
  
      float horizontalKerningForPairOfGlyphs(Glyph, Glyph) const;
      float verticalKerningForPairOfGlyphs(Glyph, Glyph) const;
  
      // Used by SimpleFontData/WidthIterator.
      SVGGlyph svgGlyphForGlyph(Glyph);
      Glyph missingGlyph();
  
  private:
      explicit SVGFontElement(Document&);
  
      virtual bool rendererIsNeeded(const RenderStyle&) OVERRIDE { return false; }
  
      void ensureGlyphCache();
      void registerLigaturesInGlyphCache(Vector<String>&);
      Vector<SVGGlyph> buildGlyphList(const UnicodeRanges&, const HashSet<String>& unicodeNames, const HashSet<String>& glyphNames) const;
      void addPairsToKerningTable(const SVGKerningPair&, KerningTable&);
      void buildKerningTable(const KerningPairVector&, KerningTable&);
  
  
      KerningTable m_horizontalKerningTable;
      KerningTable m_verticalKerningTable;
      SVGGlyphMap m_glyphMap;
      Glyph m_missingGlyph;
      bool m_isGlyphCacheValid;
  };
  
  } // namespace WebCore
  
  #endif // ENABLE(SVG_FONTS)
  #endif
  