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| 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 "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 blink { | |
| 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 DEFINE_WRAPPERTYPEINFO(); | |
| 56 public: | |
| 57 DECLARE_NODE_FACTORY(SVGFontElement); | |
| 58 | |
| 59 void invalidateGlyphCache(); | |
| 60 void collectGlyphsForString(const String&, Vector<SVGGlyph>&); | |
| 61 void collectGlyphsForAltGlyphReference(const String&, Vector<SVGGlyph>&); | |
| 62 | |
| 63 float horizontalKerningForPairOfGlyphs(Glyph, Glyph) const; | |
| 64 float verticalKerningForPairOfGlyphs(Glyph, Glyph) const; | |
| 65 | |
| 66 // Used by SimpleFontData/SimpleShaper. | |
| 67 SVGGlyph svgGlyphForGlyph(Glyph); | |
| 68 Glyph missingGlyph(); | |
| 69 | |
| 70 private: | |
| 71 explicit SVGFontElement(Document&); | |
| 72 | |
| 73 virtual bool rendererIsNeeded(const RenderStyle&) override { return false; } | |
| 74 | |
| 75 void ensureGlyphCache(); | |
| 76 void registerLigaturesInGlyphCache(Vector<String>&); | |
| 77 Vector<SVGGlyph> buildGlyphList(const UnicodeRanges&, const HashSet<String>&
unicodeNames, const HashSet<String>& glyphNames) const; | |
| 78 void addPairsToKerningTable(const SVGKerningPair&, KerningTable&); | |
| 79 void buildKerningTable(const KerningPairVector&, KerningTable&); | |
| 80 | |
| 81 | |
| 82 KerningTable m_horizontalKerningTable; | |
| 83 KerningTable m_verticalKerningTable; | |
| 84 SVGGlyphMap m_glyphMap; | |
| 85 Glyph m_missingGlyph; | |
| 86 bool m_isGlyphCacheValid; | |
| 87 }; | |
| 88 | |
| 89 } // namespace blink | |
| 90 | |
| 91 #endif // ENABLE(SVG_FONTS) | |
| 92 #endif // SVGFontElement_h | |
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