text: /*
   * Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
   * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
   * Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
   * Copyright (C) 2018-2019 Apple Inc. All rights reserved.
   *
   * 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"
  #include "SVGMarkerElement.h"
  
  #include "RenderSVGResourceMarker.h"
  #include "SVGNames.h"
  #include <wtf/IsoMallocInlines.h>
  
  namespace WebCore {
  
  WTF_MAKE_ISO_ALLOCATED_IMPL(SVGMarkerElement);
  
  inline SVGMarkerElement::SVGMarkerElement(const QualifiedName& tagName, Document& document)
      : SVGElement(tagName, document)
      , SVGFitToViewBox(this)
  {
      // Spec: If the markerWidth/markerHeight attribute is not specified, the effect is as if a value of "3" were specified.
      ASSERT(hasTagName(SVGNames::markerTag));
  
      static std::once_flag onceFlag;
      std::call_once(onceFlag, [] {
          PropertyRegistry::registerProperty<SVGNames::refXAttr, &SVGMarkerElement::m_refX>();
          PropertyRegistry::registerProperty<SVGNames::refYAttr, &SVGMarkerElement::m_refY>();
          PropertyRegistry::registerProperty<SVGNames::markerWidthAttr, &SVGMarkerElement::m_markerWidth>();
          PropertyRegistry::registerProperty<SVGNames::markerHeightAttr, &SVGMarkerElement::m_markerHeight>();
          PropertyRegistry::registerProperty<SVGNames::markerUnitsAttr, SVGMarkerUnitsType, &SVGMarkerElement::m_markerUnits>();
          PropertyRegistry::registerProperty<SVGNames::orientAttr, &SVGMarkerElement::m_orientAngle, &SVGMarkerElement::m_orientType>();
      });
  }
  
  Ref<SVGMarkerElement> SVGMarkerElement::create(const QualifiedName& tagName, Document& document)
  {
      return adoptRef(*new SVGMarkerElement(tagName, document));
  }
  
  AffineTransform SVGMarkerElement::viewBoxToViewTransform(float viewWidth, float viewHeight) const
  {
      return SVGFitToViewBox::viewBoxToViewTransform(viewBox(), preserveAspectRatio(), viewWidth, viewHeight);
  }
  
  void SVGMarkerElement::parseAttribute(const QualifiedName& name, const AtomString& value)
  {
      if (name == SVGNames::markerUnitsAttr) {
          auto propertyValue = SVGPropertyTraits<SVGMarkerUnitsType>::fromString(value);
          if (propertyValue > 0)
              m_markerUnits->setBaseValInternal<SVGMarkerUnitsType>(propertyValue);
          return;
      }
  
      if (name == SVGNames::orientAttr) {
          auto pair = SVGPropertyTraits<std::pair<SVGAngleValue, SVGMarkerOrientType>>::fromString(value);
          m_orientAngle->setBaseValInternal(pair.first);
          m_orientType->setBaseValInternal(pair.second);
          return;
      }
  
      SVGParsingError parseError = NoError;
  
      if (name == SVGNames::refXAttr)
          m_refX->setBaseValInternal(SVGLengthValue::construct(SVGLengthMode::Width, value, parseError));
      else if (name == SVGNames::refYAttr)
          m_refY->setBaseValInternal(SVGLengthValue::construct(SVGLengthMode::Height, value, parseError));
      else if (name == SVGNames::markerWidthAttr)
          m_markerWidth->setBaseValInternal(SVGLengthValue::construct(SVGLengthMode::Width, value, parseError));
      else if (name == SVGNames::markerHeightAttr)
          m_markerHeight->setBaseValInternal(SVGLengthValue::construct(SVGLengthMode::Height, value, parseError));
  
      reportAttributeParsingError(parseError, name, value);
  
      SVGElement::parseAttribute(name, value);
      SVGFitToViewBox::parseAttribute(name, value);
  }
  
  void SVGMarkerElement::svgAttributeChanged(const QualifiedName& attrName)
  {
      if (PropertyRegistry::isKnownAttribute(attrName)) {
          InstanceInvalidationGuard guard(*this);
          if (PropertyRegistry::isAnimatedLengthAttribute(attrName))
              updateRelativeLengthsInformation();
          if (RenderObject* object = renderer())
              object->setNeedsLayout();
          return;
      }
      
      if (SVGFitToViewBox::isKnownAttribute(attrName)) {
          if (RenderObject* object = renderer())
              object->setNeedsLayout();
          return;
      }
  
      SVGElement::svgAttributeChanged(attrName);
  }
  
  void SVGMarkerElement::childrenChanged(const ChildChange& change)
  {
      SVGElement::childrenChanged(change);
  
      if (change.source == ChildChangeSource::Parser)
          return;
  
      if (RenderObject* object = renderer())
          object->setNeedsLayout();
  }
  
  String SVGMarkerElement::orient() const
  {
      return getAttribute(SVGNames::orientAttr);
  }
  
  void SVGMarkerElement::setOrient(const String& orient)
  {
      setAttribute(SVGNames::orientAttr, orient);
  }
  
  void SVGMarkerElement::setOrientToAuto()
  {
      m_orientType->setBaseVal(SVGMarkerOrientAuto);
  }
  
  void SVGMarkerElement::setOrientToAngle(const SVGAngle& angle)
  {
      m_orientAngle->baseVal()->newValueSpecifiedUnits(angle.unitType(), angle.valueInSpecifiedUnits());
  }
  
  RenderPtr<RenderElement> SVGMarkerElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
  {
      return createRenderer<RenderSVGResourceMarker>(*this, WTFMove(style));
  }
  
  bool SVGMarkerElement::selfHasRelativeLengths() const
  {
      return refX().isRelative()
          || refY().isRelative()
          || markerWidth().isRelative()
          || markerHeight().isRelative();
  }
  
  }
  