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SVGGlyphElement.cpp
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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 "config.h"
22#include "wtf/Platform.h"
23
24#if ENABLE(SVG_FONTS)
25#include "SVGGlyphElement.h"
26
27#include "SVGFontElement.h"
28//FIXME khtml #include "SVGFontFaceElement.h"
29#include "SVGFontData.h"
30#include "SVGNames.h"
31#include "SVGParserUtilities.h"
32//FIXME khtml #include "SimpleFontData.h"
33
34namespace WebCore {
35
36using namespace SVGNames;
37
38SVGGlyphElement::SVGGlyphElement(const QualifiedName& tagName, Document* doc)
39 : SVGStyledElement(tagName, doc)
40{
41}
42
43SVGGlyphElement::~SVGGlyphElement()
44{
45}
46
47void 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 SVGStyledElement::insertedIntoDocument();
55}
56
57void SVGGlyphElement::removedFromDocument()
58{
59 Node* fontNode = parentNode();
60 if (fontNode && fontNode->hasTagName(fontTag)) {
61 if (SVGFontElement* element = static_cast<SVGFontElement*>(fontNode))
62 element->invalidateGlyphCache();
63 }
64 SVGStyledElement::removedFromDocument();
65}
66
67static inline SVGGlyphIdentifier::ArabicForm parseArabicForm(const AtomicString& value)
68{
69 if (value == "medial")
70 return SVGGlyphIdentifier::Medial;
71 else if (value == "terminal")
72 return SVGGlyphIdentifier::Terminal;
73 else if (value == "isolated")
74 return SVGGlyphIdentifier::Isolated;
75 else if (value == "initial")
76 return SVGGlyphIdentifier::Initial;
77
78 return SVGGlyphIdentifier::None;
79}
80
81static inline SVGGlyphIdentifier::Orientation parseOrientation(const AtomicString& value)
82{
83 if (value == "h")
84 return SVGGlyphIdentifier::Horizontal;
85 else if (value == "v")
86 return SVGGlyphIdentifier::Vertical;
87
88 return SVGGlyphIdentifier::Both;
89}
90
91static inline Path parsePathData(const AtomicString& value)
92{
93 Path result;
94 pathFromSVGData(result, value);
95
96 return result;
97}
98
99void SVGGlyphElement::inheritUnspecifiedAttributes(SVGGlyphIdentifier& identifier, const SVGFontData* svgFontData)
100{
101 if (identifier.horizontalAdvanceX == SVGGlyphIdentifier::inheritedValue())
102 identifier.horizontalAdvanceX = svgFontData->horizontalAdvanceX();
103
104 if (identifier.verticalOriginX == SVGGlyphIdentifier::inheritedValue())
105 identifier.verticalOriginX = svgFontData->verticalOriginX();
106
107 if (identifier.verticalOriginY == SVGGlyphIdentifier::inheritedValue())
108 identifier.verticalOriginY = svgFontData->verticalOriginY();
109
110 if (identifier.verticalAdvanceY == SVGGlyphIdentifier::inheritedValue())
111 identifier.verticalAdvanceY = svgFontData->verticalAdvanceY();
112}
113
114static inline float parseSVGGlyphAttribute(const SVGElement* element, const WebCore::QualifiedName& name)
115{
116 AtomicString value(element->getAttribute(name));
117 if (value.isEmpty())
118 return SVGGlyphIdentifier::inheritedValue();
119
120 return value.string().string().toFloat();
121}
122
123SVGGlyphIdentifier SVGGlyphElement::buildGenericGlyphIdentifier(const SVGElement* element)
124{
125 SVGGlyphIdentifier identifier;
126 identifier.pathData = parsePathData(element->getAttribute(dAttr));
127
128 // Spec: The horizontal advance after rendering the glyph in horizontal orientation.
129 // If the attribute is not specified, the effect is as if the attribute were set to the
130 // value of the font's horiz-adv-x attribute. Glyph widths are required to be non-negative,
131 // even if the glyph is typically rendered right-to-left, as in Hebrew and Arabic scripts.
132 identifier.horizontalAdvanceX = parseSVGGlyphAttribute(element, horiz_adv_xAttr);
133
134 // Spec: The X-coordinate in the font coordinate system of the origin of the glyph to be
135 // used when drawing vertically oriented text. If the attribute is not specified, the effect
136 // is as if the attribute were set to the value of the font's vert-origin-x attribute.
137 identifier.verticalOriginX = parseSVGGlyphAttribute(element, vert_origin_xAttr);
138
139 // Spec: The Y-coordinate in the font coordinate system of the origin of a glyph to be
140 // used when drawing vertically oriented text. If the attribute is not specified, the effect
141 // is as if the attribute were set to the value of the font's vert-origin-y attribute.
142 identifier.verticalOriginY = parseSVGGlyphAttribute(element, vert_origin_yAttr);
143
144 // Spec: The vertical advance after rendering a glyph in vertical orientation.
145 // If the attribute is not specified, the effect is as if the attribute were set to the
146 // value of the font's vert-adv-y attribute.
147 identifier.verticalAdvanceY = parseSVGGlyphAttribute(element, vert_adv_yAttr);
148
149 return identifier;
150}
151
152SVGGlyphIdentifier SVGGlyphElement::buildGlyphIdentifier() const
153{
154 SVGGlyphIdentifier identifier(buildGenericGlyphIdentifier(this));
155 identifier.glyphName = getAttribute(glyph_nameAttr);
156 identifier.orientation = parseOrientation(getAttribute(orientationAttr));
157 identifier.arabicForm = parseArabicForm(getAttribute(arabic_formAttr));
158
159 String language = getAttribute(langAttr);
160 if (!language.isEmpty())
161 identifier.languages = parseDelimitedString(language, ',');
162
163 return identifier;
164}
165
166}
167
168#endif // ENABLE(SVG_FONTS)
SVGFontData.h
SVGFontElement.h
SVGGlyphElement.h
SVGNames.h
SVGParserUtilities.h
WebCore
Definition: CSSHelper.h:7
WebCore::String
DOM::DOMString String
Definition: PlatformString.h:8
WebCore::Path
khtml::Path Path
Definition: PathTraversalState.h:37
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