1 /* 2 * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann (at) kde.org> 3 * Copyright (C) 2004, 2005, 2006, 2007, 2010 Rob Buis <buis (at) 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 #ifndef SVGFitToViewBox_h 22 #define SVGFitToViewBox_h 23 24 #include "SVGNames.h" 25 #include "core/dom/QualifiedName.h" 26 #include "core/svg/SVGPreserveAspectRatio.h" 27 #include "core/svg/SVGRect.h" 28 #include "wtf/HashSet.h" 29 30 namespace WebCore { 31 32 class AffineTransform; 33 class Document; 34 35 class SVGFitToViewBox { 36 public: 37 static AffineTransform viewBoxToViewTransform(const FloatRect& viewBoxRect, const SVGPreserveAspectRatio&, float viewWidth, float viewHeight); 38 39 static bool isKnownAttribute(const QualifiedName&); 40 static void addSupportedAttributes(HashSet<QualifiedName>&); 41 42 template<class SVGElementTarget> 43 static bool parseAttribute(SVGElementTarget* target, const QualifiedName& name, const AtomicString& value) 44 { 45 ASSERT(target); 46 if (name == SVGNames::viewBoxAttr) { 47 FloatRect viewBox; 48 bool valueIsValid = !value.isNull() && parseViewBox(&target->document(), value, viewBox); 49 if (valueIsValid) 50 target->setViewBoxBaseValue(viewBox); 51 else 52 target->setViewBoxBaseValue(SVGRect(SVGRect::InvalidSVGRectTag())); 53 return true; 54 } 55 56 if (name == SVGNames::preserveAspectRatioAttr) { 57 SVGPreserveAspectRatio preserveAspectRatio; 58 preserveAspectRatio.parse(value); 59 target->setPreserveAspectRatioBaseValue(preserveAspectRatio); 60 return true; 61 } 62 63 return false; 64 } 65 66 static bool parseViewBox(Document*, const LChar*& start, const LChar* end, FloatRect& viewBox, bool validate = true); 67 static bool parseViewBox(Document*, const UChar*& start, const UChar* end, FloatRect& viewBox, bool validate = true); 68 69 private: 70 static bool parseViewBox(Document*, const String&, FloatRect&); 71 }; 72 73 } // namespace WebCore 74 75 #endif // SVGFitToViewBox_h 76
