1 /* 2 * Copyright (C) 2007 Eric Seidel <eric (at) webkit.org> 3 * Copyright (C) 2007, 2008 Nikolas Zimmermann <zimmermann (at) kde.org> 4 * Copyright (C) 2008 Rob Buis <buis (at) 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 #include "config.h" 23 24 #if ENABLE(SVG_FONTS) 25 #include "core/svg/SVGGlyphElement.h" 26 27 #include "core/svg/SVGFontData.h" 28 #include "core/svg/SVGFontElement.h" 29 #include "core/svg/SVGPathUtilities.h" 30 31 namespace blink { 32 33 inline SVGGlyphElement::SVGGlyphElement(Document& document) 34 : SVGElement(SVGNames::glyphTag, document) 35 { 36 } 37 38 DEFINE_NODE_FACTORY(SVGGlyphElement) 39 40 void SVGGlyphElement::invalidateGlyphCache() 41 { 42 ContainerNode* fontNode = parentNode(); 43 if (isSVGFontElement(fontNode)) 44 toSVGFontElement(*fontNode).invalidateGlyphCache(); 45 } 46 47 void SVGGlyphElement::parseAttribute(const QualifiedName& name, const AtomicString& value) 48 { 49 if (name == SVGNames::dAttr) 50 invalidateGlyphCache(); 51 else 52 SVGElement::parseAttribute(name, value); 53 } 54 55 Node::InsertionNotificationRequest SVGGlyphElement::insertedInto(ContainerNode* rootParent) 56 { 57 invalidateGlyphCache(); 58 return SVGElement::insertedInto(rootParent); 59 } 60 61 void SVGGlyphElement::removedFrom(ContainerNode* rootParent) 62 { 63 if (rootParent->inDocument()) 64 invalidateGlyphCache(); 65 SVGElement::removedFrom(rootParent); 66 } 67 68 static inline SVGGlyph::ArabicForm parseArabicForm(const AtomicString& value) 69 { 70 if (value == "medial") 71 return SVGGlyph::Medial; 72 if (value == "terminal") 73 return SVGGlyph::Terminal; 74 if (value == "isolated") 75 return SVGGlyph::Isolated; 76 if (value == "initial") 77 return SVGGlyph::Initial; 78 79 return SVGGlyph::None; 80 } 81 82 static inline SVGGlyph::Orientation parseOrientation(const AtomicString& value) 83 { 84 if (value == "h") 85 return SVGGlyph::Horizontal; 86 if (value == "v") 87 return SVGGlyph::Vertical; 88 89 return SVGGlyph::Both; 90 } 91 92 void SVGGlyphElement::inheritUnspecifiedAttributes(SVGGlyph& identifier, const SVGFontData* svgFontData) 93 { 94 if (identifier.horizontalAdvanceX == SVGGlyph::inheritedValue()) 95 identifier.horizontalAdvanceX = svgFontData->horizontalAdvanceX(); 96 97 if (identifier.verticalOriginX == SVGGlyph::inheritedValue()) 98 identifier.verticalOriginX = svgFontData->verticalOriginX(); 99 100 if (identifier.verticalOriginY == SVGGlyph::inheritedValue()) 101 identifier.verticalOriginY = svgFontData->verticalOriginY(); 102 103 if (identifier.verticalAdvanceY == SVGGlyph::inheritedValue()) 104 identifier.verticalAdvanceY = svgFontData->verticalAdvanceY(); 105 } 106 107 static inline float parseSVGGlyphAttribute(const SVGElement* element, const blink::QualifiedName& name) 108 { 109 AtomicString value(element->fastGetAttribute(name)); 110 if (value.isEmpty()) 111 return SVGGlyph::inheritedValue(); 112 113 return value.toFloat(); 114 } 115 116 SVGGlyph SVGGlyphElement::buildGenericGlyphIdentifier(const SVGElement* element) 117 { 118 SVGGlyph identifier; 119 buildPathFromString(element->fastGetAttribute(SVGNames::dAttr), identifier.pathData); 120 121 // Spec: The horizontal advance after rendering the glyph in horizontal orientation. 122 // If the attribute is not specified, the effect is as if the attribute were set to the 123 // value of the font's horiz-adv-x attribute. Glyph widths are required to be non-negative, 124 // even if the glyph is typically rendered right-to-left, as in Hebrew and Arabic scripts. 125 identifier.horizontalAdvanceX = parseSVGGlyphAttribute(element, SVGNames::horiz_adv_xAttr); 126 127 // Spec: The X-coordinate in the font coordinate system of the origin of the glyph to be 128 // used when drawing vertically oriented text. If the attribute is not specified, the effect 129 // is as if the attribute were set to the value of the font's vert-origin-x attribute. 130 identifier.verticalOriginX = parseSVGGlyphAttribute(element, SVGNames::vert_origin_xAttr); 131 132 // Spec: The Y-coordinate in the font coordinate system of the origin of a glyph to be 133 // used when drawing vertically oriented text. If the attribute is not specified, the effect 134 // is as if the attribute were set to the value of the font's vert-origin-y attribute. 135 identifier.verticalOriginY = parseSVGGlyphAttribute(element, SVGNames::vert_origin_yAttr); 136 137 // Spec: The vertical advance after rendering a glyph in vertical orientation. 138 // If the attribute is not specified, the effect is as if the attribute were set to the 139 // value of the font's vert-adv-y attribute. 140 identifier.verticalAdvanceY = parseSVGGlyphAttribute(element, SVGNames::vert_adv_yAttr); 141 142 return identifier; 143 } 144 145 SVGGlyph SVGGlyphElement::buildGlyphIdentifier() const 146 { 147 SVGGlyph identifier(buildGenericGlyphIdentifier(this)); 148 identifier.glyphName = fastGetAttribute(SVGNames::glyph_nameAttr); 149 identifier.orientation = parseOrientation(fastGetAttribute(SVGNames::orientationAttr)); 150 identifier.arabicForm = parseArabicForm(fastGetAttribute(SVGNames::arabic_formAttr)); 151 152 String language = fastGetAttribute(SVGNames::langAttr); 153 if (!language.isEmpty()) 154 identifier.languages = parseDelimitedString(language, ','); 155 156 return identifier; 157 } 158 159 } 160 161 #endif // ENABLE(SVG_FONTS) 162
