1 /* 2 * Copyright (C) 2007 Eric Seidel <eric@webkit.org> 3 * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@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 "SVGNames.h" 27 #include "core/svg/SVGAnimatedBoolean.h" 28 #include "core/svg/SVGElement.h" 29 #include "core/svg/SVGExternalResourcesRequired.h" 30 #include "core/svg/SVGGlyphMap.h" 31 #include "core/svg/SVGParserUtilities.h" 32 33 namespace WebCore { 34 35 // Describe an SVG <hkern>/<vkern> element 36 struct SVGKerningPair { 37 float kerning; 38 UnicodeRanges unicodeRange1; 39 UnicodeRanges unicodeRange2; 40 HashSet<String> unicodeName1; 41 HashSet<String> unicodeName2; 42 HashSet<String> glyphName1; 43 HashSet<String> glyphName2; 44 SVGKerningPairSVGKerningPair45 SVGKerningPair() 46 : kerning(0) 47 { 48 } 49 }; 50 51 typedef Vector<SVGKerningPair> KerningPairVector; 52 53 class SVGMissingGlyphElement; 54 55 class SVGFontElement FINAL : public SVGElement 56 , public SVGExternalResourcesRequired { 57 public: 58 static PassRefPtr<SVGFontElement> create(Document&); 59 60 void invalidateGlyphCache(); 61 void collectGlyphsForString(const String&, Vector<SVGGlyph>&); 62 void collectGlyphsForGlyphName(const String&, Vector<SVGGlyph>&); 63 64 float horizontalKerningForPairOfStringsAndGlyphs(const String& u1, const String& g1, const String& u2, const String& g2) const; 65 float verticalKerningForPairOfStringsAndGlyphs(const String& u1, const String& g1, const String& u2, const String& g2) const; 66 67 // Used by SimpleFontData/WidthIterator. 68 SVGGlyph svgGlyphForGlyph(Glyph); 69 Glyph missingGlyph(); 70 71 SVGMissingGlyphElement* firstMissingGlyphElement() const; 72 73 private: 74 explicit SVGFontElement(Document&); 75 rendererIsNeeded(const RenderStyle &)76 virtual bool rendererIsNeeded(const RenderStyle&) { return false; } 77 78 void ensureGlyphCache(); 79 void registerLigaturesInGlyphCache(Vector<String>&); 80 81 BEGIN_DECLARE_ANIMATED_PROPERTIES(SVGFontElement) 82 DECLARE_ANIMATED_BOOLEAN(ExternalResourcesRequired, externalResourcesRequired) 83 END_DECLARE_ANIMATED_PROPERTIES 84 85 KerningPairVector m_horizontalKerningPairs; 86 KerningPairVector m_verticalKerningPairs; 87 SVGGlyphMap m_glyphMap; 88 Glyph m_missingGlyph; 89 bool m_isGlyphCacheValid; 90 }; 91 92 DEFINE_NODE_TYPE_CASTS(SVGFontElement, hasTagName(SVGNames::fontTag)); 93 94 } // namespace WebCore 95 96 #endif // ENABLE(SVG_FONTS) 97 #endif 98