chromium/src/third_party/blink/renderer/core/svg/svg_enumeration.h

/*
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 * modification, are permitted provided that the following conditions are
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 * in the documentation and/or other materials provided with the
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 * this software without specific prior written permission.
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#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_SVG_SVG_ENUMERATION_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_SVG_SVG_ENUMERATION_H_

#include "third_party/blink/renderer/core/svg/properties/svg_property.h"
#include "third_party/blink/renderer/core/svg/svg_parsing_error.h"
#include "third_party/blink/renderer/platform/heap/heap.h"

namespace blink {

class SVGEnumerationMap;

template <typename Enum>
const SVGEnumerationMap& GetEnumerationMap();

class SVGEnumeration : public SVGPropertyBase {
 public:
  // SVGEnumeration does not have a tear-off type.
  typedef void TearOffType;
  typedef uint16_t PrimitiveType;

  SVGEnumeration(uint16_t value, const SVGEnumerationMap& map)
      : value_(value), map_(map) {}

  template <typename Enum>
  explicit SVGEnumeration(Enum new_value)
      : SVGEnumeration(new_value, GetEnumerationMap<Enum>()) {}

  uint16_t Value() const {
    return value_ <= MaxExposedEnumValue() ? value_ : 0;
  }
  void SetValue(uint16_t);

  // Typed accessors. These should generally be used instead of the above ones.
  template <typename Enum>
  Enum EnumValue() const {
    DCHECK_LE(value_, MaxInternalEnumValue());
    return static_cast<Enum>(value_);
  }
  template <typename Enum>
  void SetEnumValue(Enum value) {
    SetValue(value);
  }

  // SVGPropertyBase:
  SVGEnumeration* Clone() const {
    return MakeGarbageCollected<SVGEnumeration>(value_, map_);
  }
  SVGPropertyBase* CloneForAnimation(const String&) const override;

  String ValueAsString() const override;
  SVGParsingError SetValueAsString(const String&);

  void Add(const SVGPropertyBase*, const SVGElement*) override;
  void CalculateAnimatedValue(
      const SMILAnimationEffectParameters&,
      float percentage,
      unsigned repeat_count,
      const SVGPropertyBase* from,
      const SVGPropertyBase* to,
      const SVGPropertyBase* to_at_end_of_duration_value,
      const SVGElement*) override;
  float CalculateDistance(const SVGPropertyBase* to,
                          const SVGElement*) const override;

  static AnimatedPropertyType ClassType() { return kAnimatedEnumeration; }
  AnimatedPropertyType GetType() const override { return ClassType(); }

  // This is the maximum value that is exposed as an IDL constant on the
  // relevant interface.
  uint16_t MaxExposedEnumValue() const;

  void SetInitial(unsigned value) { SetValue(static_cast<uint16_t>(value)); }
  static constexpr int kInitialValueBits = 3;

 protected:
  // This is the maximum value of all the internal enumeration values.
  // This assumes that the map is sorted on the enumeration value.
  uint16_t MaxInternalEnumValue() const;

  // Used by SVGMarkerOrientEnumeration.
  virtual void NotifyChange() {}

  uint16_t value_;
  const SVGEnumerationMap& map_;
};

#define DECLARE_SVG_ENUM_MAP(cpp_enum_type) \
  template <>                               \
  const SVGEnumerationMap& GetEnumerationMap<cpp_enum_type>()

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_SVG_SVG_ENUMERATION_H_