1 /*
2 Copyright (C) 2007 Eric Seidel <eric@webkit.org>
3 Copyright (C) 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public License
16 along with this library; see the file COPYING.LIB. If not, write to
17 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 Boston, MA 02110-1301, USA.
19 */
20
21 #include "wtf/Platform.h"
22
23 #if ENABLE(SVG_FONTS)
24 #include "SVGGlyphElement.h"
25
26 #include "SVGFontElement.h"
27 //FIXME khtml #include "SVGFontFaceElement.h"
28 #include "SVGFontData.h"
29 #include "SVGNames.h"
30 #include "SVGParserUtilities.h"
31 //FIXME khtml #include "SimpleFontData.h"
32
33 namespace WebCore
34 {
35
36 using namespace SVGNames;
37
SVGGlyphElement(const QualifiedName & tagName,Document * doc)38 SVGGlyphElement::SVGGlyphElement(const QualifiedName &tagName, Document *doc)
39 : SVGStyledElement(tagName, doc)
40 {
41 }
42
~SVGGlyphElement()43 SVGGlyphElement::~SVGGlyphElement()
44 {
45 }
46
insertedIntoDocument()47 void SVGGlyphElement::insertedIntoDocument()
48 {
49 Node *fontNode = parentNode();
50 if (fontNode && fontNode->hasTagName(fontTag)) {
51 if (SVGFontElement *element = static_cast<SVGFontElement *>(fontNode)) {
52 element->invalidateGlyphCache();
53 }
54 }
55 SVGStyledElement::insertedIntoDocument();
56 }
57
removedFromDocument()58 void SVGGlyphElement::removedFromDocument()
59 {
60 Node *fontNode = parentNode();
61 if (fontNode && fontNode->hasTagName(fontTag)) {
62 if (SVGFontElement *element = static_cast<SVGFontElement *>(fontNode)) {
63 element->invalidateGlyphCache();
64 }
65 }
66 SVGStyledElement::removedFromDocument();
67 }
68
parseArabicForm(const AtomicString & value)69 static inline SVGGlyphIdentifier::ArabicForm parseArabicForm(const AtomicString &value)
70 {
71 if (value == "medial") {
72 return SVGGlyphIdentifier::Medial;
73 } else if (value == "terminal") {
74 return SVGGlyphIdentifier::Terminal;
75 } else if (value == "isolated") {
76 return SVGGlyphIdentifier::Isolated;
77 } else if (value == "initial") {
78 return SVGGlyphIdentifier::Initial;
79 }
80
81 return SVGGlyphIdentifier::None;
82 }
83
parseOrientation(const AtomicString & value)84 static inline SVGGlyphIdentifier::Orientation parseOrientation(const AtomicString &value)
85 {
86 if (value == "h") {
87 return SVGGlyphIdentifier::Horizontal;
88 } else if (value == "v") {
89 return SVGGlyphIdentifier::Vertical;
90 }
91
92 return SVGGlyphIdentifier::Both;
93 }
94
parsePathData(const AtomicString & value)95 static inline Path parsePathData(const AtomicString &value)
96 {
97 Path result;
98 pathFromSVGData(result, value);
99
100 return result;
101 }
102
inheritUnspecifiedAttributes(SVGGlyphIdentifier & identifier,const SVGFontData * svgFontData)103 void SVGGlyphElement::inheritUnspecifiedAttributes(SVGGlyphIdentifier &identifier, const SVGFontData *svgFontData)
104 {
105 if (identifier.horizontalAdvanceX == SVGGlyphIdentifier::inheritedValue()) {
106 identifier.horizontalAdvanceX = svgFontData->horizontalAdvanceX();
107 }
108
109 if (identifier.verticalOriginX == SVGGlyphIdentifier::inheritedValue()) {
110 identifier.verticalOriginX = svgFontData->verticalOriginX();
111 }
112
113 if (identifier.verticalOriginY == SVGGlyphIdentifier::inheritedValue()) {
114 identifier.verticalOriginY = svgFontData->verticalOriginY();
115 }
116
117 if (identifier.verticalAdvanceY == SVGGlyphIdentifier::inheritedValue()) {
118 identifier.verticalAdvanceY = svgFontData->verticalAdvanceY();
119 }
120 }
121
parseSVGGlyphAttribute(const SVGElement * element,const WebCore::QualifiedName & name)122 static inline float parseSVGGlyphAttribute(const SVGElement *element, const WebCore::QualifiedName &name)
123 {
124 AtomicString value(element->getAttribute(name));
125 if (value.isEmpty()) {
126 return SVGGlyphIdentifier::inheritedValue();
127 }
128
129 return value.string().string().toFloat();
130 }
131
buildGenericGlyphIdentifier(const SVGElement * element)132 SVGGlyphIdentifier SVGGlyphElement::buildGenericGlyphIdentifier(const SVGElement *element)
133 {
134 SVGGlyphIdentifier identifier;
135 identifier.pathData = parsePathData(element->getAttribute(dAttr));
136
137 // Spec: The horizontal advance after rendering the glyph in horizontal 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 horiz-adv-x attribute. Glyph widths are required to be non-negative,
140 // even if the glyph is typically rendered right-to-left, as in Hebrew and Arabic scripts.
141 identifier.horizontalAdvanceX = parseSVGGlyphAttribute(element, horiz_adv_xAttr);
142
143 // Spec: The X-coordinate in the font coordinate system of the origin of the glyph to be
144 // used when drawing vertically oriented text. If the attribute is not specified, the effect
145 // is as if the attribute were set to the value of the font's vert-origin-x attribute.
146 identifier.verticalOriginX = parseSVGGlyphAttribute(element, vert_origin_xAttr);
147
148 // Spec: The Y-coordinate in the font coordinate system of the origin of a glyph to be
149 // used when drawing vertically oriented text. If the attribute is not specified, the effect
150 // is as if the attribute were set to the value of the font's vert-origin-y attribute.
151 identifier.verticalOriginY = parseSVGGlyphAttribute(element, vert_origin_yAttr);
152
153 // Spec: The vertical advance after rendering a glyph in vertical orientation.
154 // If the attribute is not specified, the effect is as if the attribute were set to the
155 // value of the font's vert-adv-y attribute.
156 identifier.verticalAdvanceY = parseSVGGlyphAttribute(element, vert_adv_yAttr);
157
158 return identifier;
159 }
160
buildGlyphIdentifier() const161 SVGGlyphIdentifier SVGGlyphElement::buildGlyphIdentifier() const
162 {
163 SVGGlyphIdentifier identifier(buildGenericGlyphIdentifier(this));
164 identifier.glyphName = getAttribute(glyph_nameAttr);
165 identifier.orientation = parseOrientation(getAttribute(orientationAttr));
166 identifier.arabicForm = parseArabicForm(getAttribute(arabic_formAttr));
167
168 String language = getAttribute(langAttr);
169 if (!language.isEmpty()) {
170 identifier.languages = parseDelimitedString(language, ',');
171 }
172
173 return identifier;
174 }
175
176 }
177
178 #endif // ENABLE(SVG_FONTS)
179