1 /* 2 * Copyright (C) 2007 Eric Seidel <eric (at) webkit.org> 3 * Copyright (C) 2007 Nikolas Zimmermann <zimmermann (at) kde.org> 4 * Copyright (C) Research In Motion Limited 2010. All rights reserved. 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Library General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Library General Public License for more details. 15 * 16 * You should have received a copy of the GNU Library General Public License 17 * along with this library; see the file COPYING.LIB. If not, write to 18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA. 20 */ 21 22 #ifndef SVGFontElement_h 23 #define SVGFontElement_h 24 25 #if ENABLE(SVG_FONTS) 26 #include "core/SVGNames.h" 27 #include "core/svg/SVGAnimatedBoolean.h" 28 #include "core/svg/SVGElement.h" 29 #include "core/svg/SVGGlyphMap.h" 30 #include "core/svg/SVGParserUtilities.h" 31 32 namespace WebCore { 33 34 // Describe an SVG <hkern>/<vkern> element 35 struct SVGKerningPair { 36 float kerning; 37 UnicodeRanges unicodeRange1; 38 UnicodeRanges unicodeRange2; 39 HashSet<String> unicodeName1; 40 HashSet<String> unicodeName2; 41 HashSet<String> glyphName1; 42 HashSet<String> glyphName2; 43 44 SVGKerningPair() 45 : kerning(0) 46 { 47 } 48 }; 49 50 typedef unsigned KerningPairKey; 51 typedef Vector<SVGKerningPair> KerningPairVector; 52 typedef HashMap<KerningPairKey, float> KerningTable; 53 54 class SVGFontElement FINAL : public SVGElement { 55 public: 56 DECLARE_NODE_FACTORY(SVGFontElement); 57 58 void invalidateGlyphCache(); 59 void collectGlyphsForString(const String&, Vector<SVGGlyph>&); 60 void collectGlyphsForAltGlyphReference(const String&, Vector<SVGGlyph>&); 61 62 float horizontalKerningForPairOfGlyphs(Glyph, Glyph) const; 63 float verticalKerningForPairOfGlyphs(Glyph, Glyph) const; 64 65 // Used by SimpleFontData/WidthIterator. 66 SVGGlyph svgGlyphForGlyph(Glyph); 67 Glyph missingGlyph(); 68 69 private: 70 explicit SVGFontElement(Document&); 71 72 virtual bool rendererIsNeeded(const RenderStyle&) OVERRIDE { return false; } 73 74 void ensureGlyphCache(); 75 void registerLigaturesInGlyphCache(Vector<String>&); 76 Vector<SVGGlyph> buildGlyphList(const UnicodeRanges&, const HashSet<String>& unicodeNames, const HashSet<String>& glyphNames) const; 77 void addPairsToKerningTable(const SVGKerningPair&, KerningTable&); 78 void buildKerningTable(const KerningPairVector&, KerningTable&); 79 80 81 KerningTable m_horizontalKerningTable; 82 KerningTable m_verticalKerningTable; 83 SVGGlyphMap m_glyphMap; 84 Glyph m_missingGlyph; 85 bool m_isGlyphCacheValid; 86 }; 87 88 } // namespace WebCore 89 90 #endif // ENABLE(SVG_FONTS) 91 #endif 92