File indexing completed on 2024-04-28 15:24:43

 /*
     Copyright (C) 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 "SVGViewSpec.h"
 
 #include "PlatformString.h"
 #include "SVGParserUtilities.h"
 #include "SVGPreserveAspectRatio.h"
 #include "SVGSVGElement.h"
 #include "SVGTransformList.h"
 #include "SVGTransformable.h"
 
 namespace WebCore
 {
 
 SVGViewSpec::SVGViewSpec(const SVGSVGElement *contextElement)
     : SVGFitToViewBox()
     , SVGZoomAndPan()
     , m_transform(SVGTransformList::create(SVGNames::transformAttr))
     , m_contextElement(contextElement)
 {
 }
 
 SVGViewSpec::~SVGViewSpec()
 {
 }
 
 void SVGViewSpec::setTransform(const String &transform)
 {
     SVGTransformable::parseTransformAttribute(m_transform.get(), transform);
 }
 
 void SVGViewSpec::setViewBoxString(const String &viewBox)
 {
     float x, y, w, h;
     const UChar *c = viewBox.characters();
     const UChar *end = c + viewBox.length();
     if (!parseViewBox(c, end, x, y, w, h, false)) {
         return;
     }
     setViewBoxBaseValue(FloatRect(x, y, w, h));
 }
 
 void SVGViewSpec::setPreserveAspectRatioString(const String &preserve)
 {
     const UChar *c = preserve.characters();
     const UChar *end = c + preserve.length();
     preserveAspectRatioBaseValue()->parsePreserveAspectRatio(c, end);
 }
 
 void SVGViewSpec::setViewTargetString(const String &viewTargetString)
 {
     m_viewTargetString = viewTargetString;
 }
 
 SVGElement *SVGViewSpec::viewTarget() const
 {
     return static_cast<SVGElement *>(m_contextElement->ownerDocument()->getElementById(m_viewTargetString));
 }
 
 const SVGElement *SVGViewSpec::contextElement() const
 {
     return m_contextElement;
 }
 
 static const UChar svgViewSpec[] = {'s', 'v', 'g', 'V', 'i', 'e', 'w'};
 static const UChar viewBoxSpec[] = {'v', 'i', 'e', 'w', 'B', 'o', 'x'};
 static const UChar preserveAspectRatioSpec[] = {'p', 'r', 'e', 's', 'e', 'r', 'v', 'e', 'A', 's', 'p', 'e', 'c', 't', 'R', 'a', 't', 'i', 'o'};
 static const UChar transformSpec[] = {'t', 'r', 'a', 'n', 's', 'f', 'o', 'r', 'm'};
 static const UChar zoomAndPanSpec[] = {'z', 'o', 'o', 'm', 'A', 'n', 'd', 'P', 'a', 'n'};
 static const UChar viewTargetSpec[] =  {'v', 'i', 'e', 'w', 'T', 'a', 'r', 'g', 'e', 't'};
 
 bool SVGViewSpec::parseViewSpec(const String &viewSpec)
 {
     const UChar *currViewSpec = viewSpec.characters();
     const UChar *end = currViewSpec + viewSpec.length();
 
     if (currViewSpec >= end) {
         return false;
     }
 
     if (!skipString(currViewSpec, end, svgViewSpec, sizeof(svgViewSpec) / sizeof(UChar))) {
         return false;
     }
 
     if (currViewSpec >= end || *currViewSpec != '(') {
         return false;
     }
     currViewSpec++;
 
     while (currViewSpec < end && *currViewSpec != ')') {
         if (*currViewSpec == 'v') {
             if (skipString(currViewSpec, end, viewBoxSpec, sizeof(viewBoxSpec) / sizeof(UChar))) {
                 if (currViewSpec >= end || *currViewSpec != '(') {
                     return false;
                 }
                 currViewSpec++;
                 float x, y, w, h;
                 if (!parseViewBox(currViewSpec, end, x, y, w, h, false)) {
                     return false;
                 }
                 setViewBoxBaseValue(FloatRect(x, y, w, h));
                 if (currViewSpec >= end || *currViewSpec != ')') {
                     return false;
                 }
                 currViewSpec++;
             } else if (skipString(currViewSpec, end, viewTargetSpec, sizeof(viewTargetSpec) / sizeof(UChar))) {
                 if (currViewSpec >= end || *currViewSpec != '(') {
                     return false;
                 }
                 const UChar *viewTargetStart = ++currViewSpec;
                 while (currViewSpec < end && *currViewSpec != ')') {
                     currViewSpec++;
                 }
                 if (currViewSpec >= end) {
                     return false;
                 }
                 setViewTargetString(String(viewTargetStart, currViewSpec - viewTargetStart));
                 currViewSpec++;
             } else {
                 return false;
             }
         } else if (*currViewSpec == 'z') {
             if (!skipString(currViewSpec, end, zoomAndPanSpec, sizeof(zoomAndPanSpec) / sizeof(UChar))) {
                 return false;
             }
             if (currViewSpec >= end || *currViewSpec != '(') {
                 return false;
             }
             currViewSpec++;
             if (!parseZoomAndPan(currViewSpec, end)) {
                 return false;
             }
             if (currViewSpec >= end || *currViewSpec != ')') {
                 return false;
             }
             currViewSpec++;
         } else if (*currViewSpec == 'p') {
             if (!skipString(currViewSpec, end, preserveAspectRatioSpec, sizeof(preserveAspectRatioSpec) / sizeof(UChar))) {
                 return false;
             }
             if (currViewSpec >= end || *currViewSpec != '(') {
                 return false;
             }
             currViewSpec++;
             if (!preserveAspectRatioBaseValue()->parsePreserveAspectRatio(currViewSpec, end, false)) {
                 return false;
             }
             if (currViewSpec >= end || *currViewSpec != ')') {
                 return false;
             }
             currViewSpec++;
         } else if (*currViewSpec == 't') {
             if (!skipString(currViewSpec, end, transformSpec, sizeof(transformSpec) / sizeof(UChar))) {
                 return false;
             }
             if (currViewSpec >= end || *currViewSpec != '(') {
                 return false;
             }
             currViewSpec++;
             SVGTransformable::parseTransformAttribute(m_transform.get(), currViewSpec, end);
             if (currViewSpec >= end || *currViewSpec != ')') {
                 return false;
             }
             currViewSpec++;
         } else {
             return false;
         }
 
         if (currViewSpec < end && *currViewSpec == ';') {
             currViewSpec++;
         }
     }
 
     if (currViewSpec >= end || *currViewSpec != ')') {
         return false;
     }
 
     return true;
 }
 
 }
 
 #endif // ENABLE(SVG)