File indexing completed on 2024-04-28 15:24:32

 /*
     Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
                   2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
 
     This file is part of the KDE project
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
 
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Library General Public License for more details.
 
     You should have received a copy of the GNU Library General Public License
     along with this library; see the file COPYING.LIB.  If not, write to
     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     Boston, MA 02110-1301, USA.
 */
 
 #include "wtf/Platform.h"
 
 #if ENABLE(SVG)
 #include "SVGFitToViewBox.h"
 
 #include "AffineTransform.h"
 #include "FloatRect.h"
 #include "SVGDocumentExtensions.h"
 #include "SVGNames.h"
 #include "SVGParserUtilities.h"
 #include "SVGPreserveAspectRatio.h"
 //#include "StringImpl.h"
 
 namespace WebCore
 {
 
 SVGFitToViewBox::SVGFitToViewBox()
     : m_viewBox()
     , m_preserveAspectRatio(SVGPreserveAspectRatio::create())
 {
 }
 
 SVGFitToViewBox::~SVGFitToViewBox()
 {
 }
 
 ANIMATED_PROPERTY_DEFINITIONS_WITH_CONTEXT(SVGFitToViewBox, FloatRect, Rect, rect, ViewBox, viewBox, SVGNames::viewBoxAttr, m_viewBox)
 ANIMATED_PROPERTY_DEFINITIONS_WITH_CONTEXT(SVGFitToViewBox, SVGPreserveAspectRatio *, PreserveAspectRatio, preserveAspectRatio, PreserveAspectRatio, preserveAspectRatio, SVGNames::preserveAspectRatioAttr, m_preserveAspectRatio.get())
 
 bool SVGFitToViewBox::parseViewBox(const UChar *&c, const UChar *end, float &x, float &y, float &w, float &h, bool validate)
 {
     Document *doc = contextElement()->document();
     String str(c, end - c);
 
     skipOptionalSpaces(c, end);
 
     bool valid = (parseNumber(c, end, x) && parseNumber(c, end, y) &&
                   parseNumber(c, end, w) && parseNumber(c, end, h, false));
     if (!validate) {
         return true;
     }
     if (!valid) {
         //FIXME vtokarev doc->accessSVGExtensions()->reportWarning("Problem parsing viewBox=\"" + str + "\"");
         return false;
     }
 
     if (w < 0.0) { // check that width is positive
         doc->accessSVGExtensions()->reportError("A negative value for ViewBox width is not allowed");
         return false;
     } else if (h < 0.0) { // check that height is positive
         doc->accessSVGExtensions()->reportError("A negative value for ViewBox height is not allowed");
         return false;
     } else {
         skipOptionalSpaces(c, end);
         if (c < end) { // nothing should come after the last, fourth number
             //FIXME vtokarev doc->accessSVGExtensions()->reportWarning("Problem parsing viewBox=\"" + str + "\"");
             return false;
         }
     }
 
     return true;
 }
 
 AffineTransform SVGFitToViewBox::viewBoxToViewTransform(float viewWidth, float viewHeight) const
 {
     FloatRect viewBoxRect = viewBox();
     if (!viewBoxRect.width() || !viewBoxRect.height()) {
         return AffineTransform();
     }
 
     return preserveAspectRatio()->getCTM(viewBoxRect.x(),
                                          viewBoxRect.y(), viewBoxRect.width(), viewBoxRect.height(),
                                          0, 0, viewWidth, viewHeight);
 }
 
 bool SVGFitToViewBox::parseMappedAttribute(MappedAttribute *attr)
 {
     if (attr->name() == SVGNames::viewBoxAttr) {
         float x = 0.0f, y = 0.0f, w = 0.0f, h = 0.0f;
         const UChar *c = attr->value().characters();
         const UChar *end = c + attr->value().length();
         if (parseViewBox(c, end, x, y, w, h)) {
             setViewBoxBaseValue(FloatRect(x, y, w, h));
         }
         return true;
     } else if (attr->name() == SVGNames::preserveAspectRatioAttr) {
         const UChar *c = attr->value().characters();
         const UChar *end = c + attr->value().length();
         preserveAspectRatioBaseValue()->parsePreserveAspectRatio(c, end);
         return true;
     }
 
     return false;
 }
 
 bool SVGFitToViewBox::isKnownAttribute(const QualifiedName &attrName)
 {
     return (attrName == SVGNames::viewBoxAttr ||
             attrName == SVGNames::preserveAspectRatioAttr);
 }
 
 }
 
 #endif // ENABLE(SVG)