third_party/blink/renderer/core/svg/svg_geometry_element.h

/*
 * Copyright (C) 2013 Samsung Electronics. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_SVG_SVG_GEOMETRY_ELEMENT_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_SVG_SVG_GEOMETRY_ELEMENT_H_

#include "third_party/blink/renderer/core/svg/svg_graphics_element.h"

namespace blink {

class Path;
class SVGAnimatedNumber;
class SVGPointTearOff;

class SVGGeometryElement : public SVGGraphicsElement {
  DEFINE_WRAPPERTYPEINFO();

 public:
  virtual Path AsPath() const = 0;
  bool isPointInFill(SVGPointTearOff*) const;
  bool isPointInStroke(SVGPointTearOff*) const;

  Path ToClipPath() const;

  SVGAnimatedNumber* pathLength() const { return path_length_.Get(); }

  virtual float getTotalLength(ExceptionState&);
  virtual SVGPointTearOff* getPointAtLength(float distance, ExceptionState&);

  float AuthorPathLength() const;
  float PathLengthScaleFactor() const;
  static float PathLengthScaleFactor(float computed_path_length,
                                     float author_path_length);

  void Trace(Visitor*) const override;

 protected:
  SVGGeometryElement(const QualifiedName&,
                     Document&,
                     ConstructionType = kCreateSVGElement);

  void SvgAttributeChanged(const QualifiedName&) override;

  void GeometryAttributeChanged();
  void GeometryPresentationAttributeChanged(const QualifiedName&);

 private:
  bool IsSVGGeometryElement() const final { return true; }
  virtual float ComputePathLength() const;
  LayoutObject* CreateLayoutObject(const ComputedStyle&, LegacyLayout) override;

  Member<SVGAnimatedNumber> path_length_;
};

template <>
inline bool IsElementOfType<const SVGGeometryElement>(const Node& node) {
  return IsA<SVGGeometryElement>(node);
}
template <>
struct DowncastTraits<SVGGeometryElement> {
  static bool AllowFrom(const Node& node) {
    auto* svg_element = DynamicTo<SVGElement>(node);
    return svg_element && AllowFrom(*svg_element);
  }
  static bool AllowFrom(const SVGElement& svg_element) {
    return svg_element.IsSVGGeometryElement();
  }
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_SVG_SVG_GEOMETRY_ELEMENT_H_