1 /* 2 * Copyright (C) 2007 Eric Seidel <eric@webkit.org> 3 * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org> 4 * Copyright (C) 2008 Rob Buis <buis@kde.org> 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 SVGGlyphElement_h 23 #define SVGGlyphElement_h 24 25 #if ENABLE(SVG_FONTS) 26 #include "Path.h" 27 #include "SVGStyledElement.h" 28 29 #include <limits> 30 #include <wtf/Forward.h> 31 32 namespace WebCore { 33 34 class SVGFontData; 35 36 // Describe a SVG <glyph> element 37 struct SVGGlyphIdentifier { 38 enum Orientation { 39 Vertical, 40 Horizontal, 41 Both 42 }; 43 44 // SVG Font depends on exactly this order. 45 enum ArabicForm { 46 None = 0, 47 Isolated, 48 Terminal, 49 Initial, 50 Medial 51 }; 52 SVGGlyphIdentifierSVGGlyphIdentifier53 SVGGlyphIdentifier() 54 : isValid(false) 55 , orientation(Both) 56 , arabicForm(None) 57 , priority(0) 58 , nameLength(0) 59 , horizontalAdvanceX(0.0f) 60 , verticalOriginX(0.0f) 61 , verticalOriginY(0.0f) 62 , verticalAdvanceY(0.0f) 63 { 64 } 65 66 // Used to mark our float properties as "to be inherited from SVGFontData" inheritedValueSVGGlyphIdentifier67 static float inheritedValue() 68 { 69 static float s_inheritedValue = std::numeric_limits<float>::infinity(); 70 return s_inheritedValue; 71 } 72 73 bool operator==(const SVGGlyphIdentifier& other) const 74 { 75 return isValid == other.isValid 76 && orientation == other.orientation 77 && arabicForm == other.arabicForm 78 && glyphName == other.glyphName 79 && horizontalAdvanceX == other.horizontalAdvanceX 80 && verticalOriginX == other.verticalOriginX 81 && verticalOriginY == other.verticalOriginY 82 && verticalAdvanceY == other.verticalAdvanceY 83 && languages == other.languages; 84 } 85 86 bool isValid : 1; 87 88 unsigned orientation : 2; // Orientation 89 unsigned arabicForm : 3; // ArabicForm 90 int priority; 91 size_t nameLength; 92 String glyphName; 93 94 float horizontalAdvanceX; 95 float verticalOriginX; 96 float verticalOriginY; 97 float verticalAdvanceY; 98 99 Path pathData; 100 Vector<String> languages; 101 }; 102 103 class SVGGlyphElement : public SVGStyledElement { 104 public: 105 static PassRefPtr<SVGGlyphElement> create(const QualifiedName&, Document*); 106 107 SVGGlyphIdentifier buildGlyphIdentifier() const; 108 109 // Helper function used by SVGFont 110 static void inheritUnspecifiedAttributes(SVGGlyphIdentifier&, const SVGFontData*); 111 static String querySVGFontLanguage(const SVGElement*); 112 113 // Helper function shared between SVGGlyphElement & SVGMissingGlyphElement 114 static SVGGlyphIdentifier buildGenericGlyphIdentifier(const SVGElement*); 115 116 private: 117 SVGGlyphElement(const QualifiedName&, Document*); 118 119 virtual void parseMappedAttribute(Attribute*); 120 virtual void fillAttributeToPropertyTypeMap(); 121 virtual AttributeToPropertyTypeMap& attributeToPropertyTypeMap(); 122 123 virtual void insertedIntoDocument(); 124 virtual void removedFromDocument(); 125 rendererIsNeeded(RenderStyle *)126 virtual bool rendererIsNeeded(RenderStyle*) { return false; } 127 128 void invalidateGlyphCache(); 129 }; 130 131 } // namespace WebCore 132 133 #endif // ENABLE(SVG_FONTS) 134 #endif 135