text: /*
   * Copyright (C) 2007, 2010 Rob Buis <buis@kde.org>
   *
   * 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 "config.h"
  
  #if ENABLE(SVG)
  #include "SVGViewSpec.h"
  
  #include "Document.h"
  #include "SVGNames.h"
  #include "SVGParserUtilities.h"
  #include "SVGSVGElement.h"
  #include "SVGTransformable.h"
  
  namespace WebCore {
  
  // Animated property definitions
  DEFINE_ANIMATED_RECT(SVGViewSpec, SVGNames::viewBoxAttr, ViewBox, viewBox)
  DEFINE_ANIMATED_PRESERVEASPECTRATIO(SVGViewSpec, SVGNames::preserveAspectRatioAttr, PreserveAspectRatio, preserveAspectRatio)
  
  SVGViewSpec::SVGViewSpec(SVGElement* contextElement)
      : m_contextElement(contextElement)
  {
  }
  
  void SVGViewSpec::setTransform(const String& transform)
  {
      SVGTransformable::parseTransformAttribute(m_transform, transform);
  }
  
  void SVGViewSpec::setViewBoxString(const String& viewBoxStr)
  {
      FloatRect viewBox;
      const UChar* c = viewBoxStr.characters();
      const UChar* end = c + viewBoxStr.length();
      if (!parseViewBox(m_contextElement->document(), c, end, viewBox, false))
           return;
      setViewBoxBaseValue(viewBox);
  }
  
  void SVGViewSpec::setPreserveAspectRatioString(const String& preserve)
  {
      SVGPreserveAspectRatio::parsePreserveAspectRatio(this, preserve);
  }
  
  void SVGViewSpec::setViewTargetString(const String& viewTargetString)
  {
      m_viewTargetString = viewTargetString;
  }
  
  SVGElement* SVGViewSpec::viewTarget() const
  {
      return static_cast<SVGElement*>(m_contextElement->treeScope()->getElementById(m_viewTargetString));
  }
  
  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, WTF_ARRAY_LENGTH(svgViewSpec)))
          return false;
  
      if (currViewSpec >= end || *currViewSpec != '(')
          return false;
      currViewSpec++;
  
      while (currViewSpec < end && *currViewSpec != ')') {
          if (*currViewSpec == 'v') {
              if (skipString(currViewSpec, end, viewBoxSpec, WTF_ARRAY_LENGTH(viewBoxSpec))) {
                  if (currViewSpec >= end || *currViewSpec != '(')
                      return false;
                  currViewSpec++;
                  FloatRect viewBox;
                  if (!parseViewBox(m_contextElement->document(), currViewSpec, end, viewBox, false))
                      return false;
                  setViewBoxBaseValue(viewBox);
                  if (currViewSpec >= end || *currViewSpec != ')')
                      return false;
                  currViewSpec++;
              } else if (skipString(currViewSpec, end, viewTargetSpec, WTF_ARRAY_LENGTH(viewTargetSpec))) {
                  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, WTF_ARRAY_LENGTH(zoomAndPanSpec)))
                  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, WTF_ARRAY_LENGTH(preserveAspectRatioSpec)))
                  return false;
              if (currViewSpec >= end || *currViewSpec != '(')
                  return false;
              currViewSpec++;
              bool result = false; 
              setPreserveAspectRatioBaseValue(SVGPreserveAspectRatio::parsePreserveAspectRatio(currViewSpec, end, false, result));
              if (!result)
                  return false;
              if (currViewSpec >= end || *currViewSpec != ')')
                  return false;
              currViewSpec++;
          } else if (*currViewSpec == 't') {
              if (!skipString(currViewSpec, end, transformSpec, WTF_ARRAY_LENGTH(transformSpec)))
                  return false;
              if (currViewSpec >= end || *currViewSpec != '(')
                  return false;
              currViewSpec++;
              SVGTransformable::parseTransformAttribute(m_transform, currViewSpec, end, SVGTransformable::DoNotClearList);
              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)
  