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0001 /* 0002 Copyright (C) 2007 Rob Buis <buis@kde.org> 0003 0004 This file is part of the KDE project 0005 0006 This library is free software; you can redistribute it and/or 0007 modify it under the terms of the GNU Library General Public 0008 License as published by the Free Software Foundation; either 0009 version 2 of the License, or (at your option) any later version. 0010 0011 This library is distributed in the hope that it will be useful, 0012 but WITHOUT ANY WARRANTY; without even the implied warranty of 0013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 0014 Library General Public License for more details. 0015 0016 You should have received a copy of the GNU Library General Public License 0017 along with this library; see the file COPYING.LIB. If not, write to 0018 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 0019 Boston, MA 02110-1301, USA. 0020 */ 0021 0022 #include "wtf/Platform.h" 0023 #if ENABLE(SVG) 0024 #include "SVGViewSpec.h" 0025 0026 #include "PlatformString.h" 0027 #include "SVGParserUtilities.h" 0028 #include "SVGPreserveAspectRatio.h" 0029 #include "SVGSVGElement.h" 0030 #include "SVGTransformList.h" 0031 #include "SVGTransformable.h" 0032 0033 namespace WebCore 0034 { 0035 0036 SVGViewSpec::SVGViewSpec(const SVGSVGElement *contextElement) 0037 : SVGFitToViewBox() 0038 , SVGZoomAndPan() 0039 , m_transform(SVGTransformList::create(SVGNames::transformAttr)) 0040 , m_contextElement(contextElement) 0041 { 0042 } 0043 0044 SVGViewSpec::~SVGViewSpec() 0045 { 0046 } 0047 0048 void SVGViewSpec::setTransform(const String &transform) 0049 { 0050 SVGTransformable::parseTransformAttribute(m_transform.get(), transform); 0051 } 0052 0053 void SVGViewSpec::setViewBoxString(const String &viewBox) 0054 { 0055 float x, y, w, h; 0056 const UChar *c = viewBox.characters(); 0057 const UChar *end = c + viewBox.length(); 0058 if (!parseViewBox(c, end, x, y, w, h, false)) { 0059 return; 0060 } 0061 setViewBoxBaseValue(FloatRect(x, y, w, h)); 0062 } 0063 0064 void SVGViewSpec::setPreserveAspectRatioString(const String &preserve) 0065 { 0066 const UChar *c = preserve.characters(); 0067 const UChar *end = c + preserve.length(); 0068 preserveAspectRatioBaseValue()->parsePreserveAspectRatio(c, end); 0069 } 0070 0071 void SVGViewSpec::setViewTargetString(const String &viewTargetString) 0072 { 0073 m_viewTargetString = viewTargetString; 0074 } 0075 0076 SVGElement *SVGViewSpec::viewTarget() const 0077 { 0078 return static_cast<SVGElement *>(m_contextElement->ownerDocument()->getElementById(m_viewTargetString)); 0079 } 0080 0081 const SVGElement *SVGViewSpec::contextElement() const 0082 { 0083 return m_contextElement; 0084 } 0085 0086 static const UChar svgViewSpec[] = {'s', 'v', 'g', 'V', 'i', 'e', 'w'}; 0087 static const UChar viewBoxSpec[] = {'v', 'i', 'e', 'w', 'B', 'o', 'x'}; 0088 static const UChar preserveAspectRatioSpec[] = {'p', 'r', 'e', 's', 'e', 'r', 'v', 'e', 'A', 's', 'p', 'e', 'c', 't', 'R', 'a', 't', 'i', 'o'}; 0089 static const UChar transformSpec[] = {'t', 'r', 'a', 'n', 's', 'f', 'o', 'r', 'm'}; 0090 static const UChar zoomAndPanSpec[] = {'z', 'o', 'o', 'm', 'A', 'n', 'd', 'P', 'a', 'n'}; 0091 static const UChar viewTargetSpec[] = {'v', 'i', 'e', 'w', 'T', 'a', 'r', 'g', 'e', 't'}; 0092 0093 bool SVGViewSpec::parseViewSpec(const String &viewSpec) 0094 { 0095 const UChar *currViewSpec = viewSpec.characters(); 0096 const UChar *end = currViewSpec + viewSpec.length(); 0097 0098 if (currViewSpec >= end) { 0099 return false; 0100 } 0101 0102 if (!skipString(currViewSpec, end, svgViewSpec, sizeof(svgViewSpec) / sizeof(UChar))) { 0103 return false; 0104 } 0105 0106 if (currViewSpec >= end || *currViewSpec != '(') { 0107 return false; 0108 } 0109 currViewSpec++; 0110 0111 while (currViewSpec < end && *currViewSpec != ')') { 0112 if (*currViewSpec == 'v') { 0113 if (skipString(currViewSpec, end, viewBoxSpec, sizeof(viewBoxSpec) / sizeof(UChar))) { 0114 if (currViewSpec >= end || *currViewSpec != '(') { 0115 return false; 0116 } 0117 currViewSpec++; 0118 float x, y, w, h; 0119 if (!parseViewBox(currViewSpec, end, x, y, w, h, false)) { 0120 return false; 0121 } 0122 setViewBoxBaseValue(FloatRect(x, y, w, h)); 0123 if (currViewSpec >= end || *currViewSpec != ')') { 0124 return false; 0125 } 0126 currViewSpec++; 0127 } else if (skipString(currViewSpec, end, viewTargetSpec, sizeof(viewTargetSpec) / sizeof(UChar))) { 0128 if (currViewSpec >= end || *currViewSpec != '(') { 0129 return false; 0130 } 0131 const UChar *viewTargetStart = ++currViewSpec; 0132 while (currViewSpec < end && *currViewSpec != ')') { 0133 currViewSpec++; 0134 } 0135 if (currViewSpec >= end) { 0136 return false; 0137 } 0138 setViewTargetString(String(viewTargetStart, currViewSpec - viewTargetStart)); 0139 currViewSpec++; 0140 } else { 0141 return false; 0142 } 0143 } else if (*currViewSpec == 'z') { 0144 if (!skipString(currViewSpec, end, zoomAndPanSpec, sizeof(zoomAndPanSpec) / sizeof(UChar))) { 0145 return false; 0146 } 0147 if (currViewSpec >= end || *currViewSpec != '(') { 0148 return false; 0149 } 0150 currViewSpec++; 0151 if (!parseZoomAndPan(currViewSpec, end)) { 0152 return false; 0153 } 0154 if (currViewSpec >= end || *currViewSpec != ')') { 0155 return false; 0156 } 0157 currViewSpec++; 0158 } else if (*currViewSpec == 'p') { 0159 if (!skipString(currViewSpec, end, preserveAspectRatioSpec, sizeof(preserveAspectRatioSpec) / sizeof(UChar))) { 0160 return false; 0161 } 0162 if (currViewSpec >= end || *currViewSpec != '(') { 0163 return false; 0164 } 0165 currViewSpec++; 0166 if (!preserveAspectRatioBaseValue()->parsePreserveAspectRatio(currViewSpec, end, false)) { 0167 return false; 0168 } 0169 if (currViewSpec >= end || *currViewSpec != ')') { 0170 return false; 0171 } 0172 currViewSpec++; 0173 } else if (*currViewSpec == 't') { 0174 if (!skipString(currViewSpec, end, transformSpec, sizeof(transformSpec) / sizeof(UChar))) { 0175 return false; 0176 } 0177 if (currViewSpec >= end || *currViewSpec != '(') { 0178 return false; 0179 } 0180 currViewSpec++; 0181 SVGTransformable::parseTransformAttribute(m_transform.get(), currViewSpec, end); 0182 if (currViewSpec >= end || *currViewSpec != ')') { 0183 return false; 0184 } 0185 currViewSpec++; 0186 } else { 0187 return false; 0188 } 0189 0190 if (currViewSpec < end && *currViewSpec == ';') { 0191 currViewSpec++; 0192 } 0193 } 0194 0195 if (currViewSpec >= end || *currViewSpec != ')') { 0196 return false; 0197 } 0198 0199 return true; 0200 } 0201 0202 } 0203 0204 #endif // ENABLE(SVG)