1 /*
2 Copyright (C) 2007 Rob Buis <buis@kde.org>
3
4 This file is part of the KDE project
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 #if ENABLE(SVG)
24 #include "SVGViewSpec.h"
25
26 #include "Document.h"
27 #include "PlatformString.h"
28 #include "SVGParserUtilities.h"
29 #include "SVGPreserveAspectRatio.h"
30 #include "SVGSVGElement.h"
31 #include "SVGTransformList.h"
32 #include "SVGTransformable.h"
33
34 namespace WebCore {
35
SVGViewSpec(const SVGSVGElement * contextElement)36 SVGViewSpec::SVGViewSpec(const SVGSVGElement* contextElement)
37 : SVGFitToViewBox()
38 , SVGZoomAndPan()
39 , m_transform(SVGTransformList::create(SVGNames::transformAttr))
40 , m_contextElement(contextElement)
41 {
42 }
43
~SVGViewSpec()44 SVGViewSpec::~SVGViewSpec()
45 {
46 }
47
setTransform(const String & transform)48 void SVGViewSpec::setTransform(const String& transform)
49 {
50 SVGTransformable::parseTransformAttribute(m_transform.get(), transform);
51 }
52
setViewBoxString(const String & viewBox)53 void SVGViewSpec::setViewBoxString(const String& viewBox)
54 {
55 float x, y, w, h;
56 const UChar* c = viewBox.characters();
57 const UChar* end = c + viewBox.length();
58 if (!parseViewBox(c, end, x, y, w, h, false))
59 return;
60 setViewBoxBaseValue(FloatRect(x, y, w, h));
61 }
62
setPreserveAspectRatioString(const String & preserve)63 void SVGViewSpec::setPreserveAspectRatioString(const String& preserve)
64 {
65 const UChar* c = preserve.characters();
66 const UChar* end = c + preserve.length();
67 preserveAspectRatioBaseValue()->parsePreserveAspectRatio(c, end);
68 }
69
setViewTargetString(const String & viewTargetString)70 void SVGViewSpec::setViewTargetString(const String& viewTargetString)
71 {
72 m_viewTargetString = viewTargetString;
73 }
74
viewTarget() const75 SVGElement* SVGViewSpec::viewTarget() const
76 {
77 return static_cast<SVGElement*>(m_contextElement->ownerDocument()->getElementById(m_viewTargetString));
78 }
79
contextElement() const80 const SVGElement* SVGViewSpec::contextElement() const
81 {
82 return m_contextElement;
83 }
84
85 static const UChar svgViewSpec[] = {'s','v','g','V', 'i', 'e', 'w'};
86 static const UChar viewBoxSpec[] = {'v', 'i', 'e', 'w', 'B', 'o', 'x'};
87 static const UChar preserveAspectRatioSpec[] = {'p', 'r', 'e', 's', 'e', 'r', 'v', 'e', 'A', 's', 'p', 'e', 'c', 't', 'R', 'a', 't', 'i', 'o'};
88 static const UChar transformSpec[] = {'t', 'r', 'a', 'n', 's', 'f', 'o', 'r', 'm'};
89 static const UChar zoomAndPanSpec[] = {'z', 'o', 'o', 'm', 'A', 'n', 'd', 'P', 'a', 'n'};
90 static const UChar viewTargetSpec[] = {'v', 'i', 'e', 'w', 'T', 'a', 'r', 'g', 'e', 't'};
91
parseViewSpec(const String & viewSpec)92 bool SVGViewSpec::parseViewSpec(const String& viewSpec)
93 {
94 const UChar* currViewSpec = viewSpec.characters();
95 const UChar* end = currViewSpec + viewSpec.length();
96
97 if (currViewSpec >= end)
98 return false;
99
100 if (!skipString(currViewSpec, end, svgViewSpec, sizeof(svgViewSpec) / sizeof(UChar)))
101 return false;
102
103 if (currViewSpec >= end || *currViewSpec != '(' )
104 return false;
105 currViewSpec++;
106
107 while (currViewSpec < end && *currViewSpec != ')') {
108 if (*currViewSpec == 'v') {
109 if (skipString(currViewSpec, end, viewBoxSpec, sizeof(viewBoxSpec) / sizeof(UChar))) {
110 if (currViewSpec >= end || *currViewSpec != '(')
111 return false;
112 currViewSpec++;
113 float x, y, w, h;
114 if (!parseViewBox(currViewSpec, end, x, y, w, h, false))
115 return false;
116 setViewBoxBaseValue(FloatRect(x, y, w, h));
117 if (currViewSpec >= end || *currViewSpec != ')')
118 return false;
119 currViewSpec++;
120 } else if (skipString(currViewSpec, end, viewTargetSpec, sizeof(viewTargetSpec) / sizeof(UChar))) {
121 if (currViewSpec >= end || *currViewSpec != '(')
122 return false;
123 const UChar* viewTargetStart = ++currViewSpec;
124 while (currViewSpec < end && *currViewSpec != ')')
125 currViewSpec++;
126 if (currViewSpec >= end)
127 return false;
128 setViewTargetString(String(viewTargetStart, currViewSpec - viewTargetStart));
129 currViewSpec++;
130 } else
131 return false;
132 } else if (*currViewSpec == 'z') {
133 if (!skipString(currViewSpec, end, zoomAndPanSpec, sizeof(zoomAndPanSpec) / sizeof(UChar)))
134 return false;
135 if (currViewSpec >= end || *currViewSpec != '(')
136 return false;
137 currViewSpec++;
138 if (!parseZoomAndPan(currViewSpec, end))
139 return false;
140 if (currViewSpec >= end || *currViewSpec != ')')
141 return false;
142 currViewSpec++;
143 } else if (*currViewSpec == 'p') {
144 if (!skipString(currViewSpec, end, preserveAspectRatioSpec, sizeof(preserveAspectRatioSpec) / sizeof(UChar)))
145 return false;
146 if (currViewSpec >= end || *currViewSpec != '(')
147 return false;
148 currViewSpec++;
149 if (!preserveAspectRatioBaseValue()->parsePreserveAspectRatio(currViewSpec, end, false))
150 return false;
151 if (currViewSpec >= end || *currViewSpec != ')')
152 return false;
153 currViewSpec++;
154 } else if (*currViewSpec == 't') {
155 if (!skipString(currViewSpec, end, transformSpec, sizeof(transformSpec) / sizeof(UChar)))
156 return false;
157 if (currViewSpec >= end || *currViewSpec != '(')
158 return false;
159 currViewSpec++;
160 SVGTransformable::parseTransformAttribute(m_transform.get(), currViewSpec, end);
161 if (currViewSpec >= end || *currViewSpec != ')')
162 return false;
163 currViewSpec++;
164 } else
165 return false;
166
167 if (currViewSpec < end && *currViewSpec == ';')
168 currViewSpec++;
169 }
170
171 if (currViewSpec >= end || *currViewSpec != ')')
172 return false;
173
174 return true;
175 }
176
177 }
178
179 #endif // ENABLE(SVG)
180