1 /*
2 Copyright (C) 2007 Rob Buis <buis@kde.org>
3
4 This library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public
6 License as published by the Free Software Foundation; either
7 version 2 of the License, or (at your option) any later version.
8
9 This library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
13
14 You should have received a copy of the GNU Library General Public License
15 along with this library; see the file COPYING.LIB. If not, write to
16 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 Boston, MA 02110-1301, USA.
18 */
19
20 #include "config.h"
21 #if ENABLE(SVG)
22 #include "SVGViewSpec.h"
23
24 #include "Document.h"
25 #include "PlatformString.h"
26 #include "SVGParserUtilities.h"
27 #include "SVGPreserveAspectRatio.h"
28 #include "SVGSVGElement.h"
29 #include "SVGTransformList.h"
30 #include "SVGTransformable.h"
31
32 namespace WebCore {
33
SVGViewSpec(const SVGSVGElement * contextElement)34 SVGViewSpec::SVGViewSpec(const SVGSVGElement* contextElement)
35 : SVGFitToViewBox()
36 , SVGZoomAndPan()
37 , m_contextElement(contextElement)
38 , m_transform(SVGTransformList::create(SVGNames::transformAttr))
39 {
40 }
41
~SVGViewSpec()42 SVGViewSpec::~SVGViewSpec()
43 {
44 }
45
setTransform(const String & transform)46 void SVGViewSpec::setTransform(const String& transform)
47 {
48 SVGTransformable::parseTransformAttribute(m_transform.get(), transform);
49 }
50
setViewBoxString(const String & viewBox)51 void SVGViewSpec::setViewBoxString(const String& viewBox)
52 {
53 float x, y, w, h;
54 const UChar* c = viewBox.characters();
55 const UChar* end = c + viewBox.length();
56 if (!parseViewBox(m_contextElement->document(), c, end, x, y, w, h, false))
57 return;
58 setViewBoxBaseValue(FloatRect(x, y, w, h));
59 }
60
setPreserveAspectRatioString(const String & preserve)61 void SVGViewSpec::setPreserveAspectRatioString(const String& preserve)
62 {
63 SVGPreserveAspectRatio::parsePreserveAspectRatio(this, preserve);
64 }
65
setViewTargetString(const String & viewTargetString)66 void SVGViewSpec::setViewTargetString(const String& viewTargetString)
67 {
68 m_viewTargetString = viewTargetString;
69 }
70
viewTarget() const71 SVGElement* SVGViewSpec::viewTarget() const
72 {
73 return static_cast<SVGElement*>(m_contextElement->document()->getElementById(m_viewTargetString));
74 }
75
76 static const UChar svgViewSpec[] = {'s', 'v', 'g', 'V', 'i', 'e', 'w'};
77 static const UChar viewBoxSpec[] = {'v', 'i', 'e', 'w', 'B', 'o', 'x'};
78 static const UChar preserveAspectRatioSpec[] = {'p', 'r', 'e', 's', 'e', 'r', 'v', 'e', 'A', 's', 'p', 'e', 'c', 't', 'R', 'a', 't', 'i', 'o'};
79 static const UChar transformSpec[] = {'t', 'r', 'a', 'n', 's', 'f', 'o', 'r', 'm'};
80 static const UChar zoomAndPanSpec[] = {'z', 'o', 'o', 'm', 'A', 'n', 'd', 'P', 'a', 'n'};
81 static const UChar viewTargetSpec[] = {'v', 'i', 'e', 'w', 'T', 'a', 'r', 'g', 'e', 't'};
82
parseViewSpec(const String & viewSpec)83 bool SVGViewSpec::parseViewSpec(const String& viewSpec)
84 {
85 const UChar* currViewSpec = viewSpec.characters();
86 const UChar* end = currViewSpec + viewSpec.length();
87
88 if (currViewSpec >= end)
89 return false;
90
91 if (!skipString(currViewSpec, end, svgViewSpec, sizeof(svgViewSpec) / sizeof(UChar)))
92 return false;
93
94 if (currViewSpec >= end || *currViewSpec != '(' )
95 return false;
96 currViewSpec++;
97
98 while (currViewSpec < end && *currViewSpec != ')') {
99 if (*currViewSpec == 'v') {
100 if (skipString(currViewSpec, end, viewBoxSpec, sizeof(viewBoxSpec) / sizeof(UChar))) {
101 if (currViewSpec >= end || *currViewSpec != '(')
102 return false;
103 currViewSpec++;
104 float x, y, w, h;
105 if (!parseViewBox(m_contextElement->document(), currViewSpec, end, x, y, w, h, false))
106 return false;
107 setViewBoxBaseValue(FloatRect(x, y, w, h));
108 if (currViewSpec >= end || *currViewSpec != ')')
109 return false;
110 currViewSpec++;
111 } else if (skipString(currViewSpec, end, viewTargetSpec, sizeof(viewTargetSpec) / sizeof(UChar))) {
112 if (currViewSpec >= end || *currViewSpec != '(')
113 return false;
114 const UChar* viewTargetStart = ++currViewSpec;
115 while (currViewSpec < end && *currViewSpec != ')')
116 currViewSpec++;
117 if (currViewSpec >= end)
118 return false;
119 setViewTargetString(String(viewTargetStart, currViewSpec - viewTargetStart));
120 currViewSpec++;
121 } else
122 return false;
123 } else if (*currViewSpec == 'z') {
124 if (!skipString(currViewSpec, end, zoomAndPanSpec, sizeof(zoomAndPanSpec) / sizeof(UChar)))
125 return false;
126 if (currViewSpec >= end || *currViewSpec != '(')
127 return false;
128 currViewSpec++;
129 if (!parseZoomAndPan(currViewSpec, end))
130 return false;
131 if (currViewSpec >= end || *currViewSpec != ')')
132 return false;
133 currViewSpec++;
134 } else if (*currViewSpec == 'p') {
135 if (!skipString(currViewSpec, end, preserveAspectRatioSpec, sizeof(preserveAspectRatioSpec) / sizeof(UChar)))
136 return false;
137 if (currViewSpec >= end || *currViewSpec != '(')
138 return false;
139 currViewSpec++;
140 bool result = false;
141 setPreserveAspectRatioBaseValue(SVGPreserveAspectRatio::parsePreserveAspectRatio(currViewSpec, end, false, result));
142 if (!result)
143 return false;
144 if (currViewSpec >= end || *currViewSpec != ')')
145 return false;
146 currViewSpec++;
147 } else if (*currViewSpec == 't') {
148 if (!skipString(currViewSpec, end, transformSpec, sizeof(transformSpec) / sizeof(UChar)))
149 return false;
150 if (currViewSpec >= end || *currViewSpec != '(')
151 return false;
152 currViewSpec++;
153 SVGTransformable::parseTransformAttribute(m_transform.get(), currViewSpec, end, SVGTransformable::DoNotClearList);
154 if (currViewSpec >= end || *currViewSpec != ')')
155 return false;
156 currViewSpec++;
157 } else
158 return false;
159
160 if (currViewSpec < end && *currViewSpec == ';')
161 currViewSpec++;
162 }
163
164 if (currViewSpec >= end || *currViewSpec != ')')
165 return false;
166
167 return true;
168 }
169
170 }
171
172 #endif // ENABLE(SVG)
173