third_party/blink/renderer/platform/geometry/calculation_value.h

/*
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#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_GEOMETRY_CALCULATION_VALUE_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GEOMETRY_CALCULATION_VALUE_H_

#include "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/platform/geometry/length.h"
#include "third_party/blink/renderer/platform/geometry/length_functions.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/ref_counted.h"

namespace blink {

class PLATFORM_EXPORT CalculationValue : public RefCounted<CalculationValue> {
  USING_FAST_MALLOC(CalculationValue);

 public:
  static scoped_refptr<CalculationValue> Create(PixelsAndPercent value,
                                                ValueRange range) {
    return base::AdoptRef(new CalculationValue(value, range));
  }

  float Evaluate(float max_value) const {
    float value = Pixels() + Percent() / 100 * max_value;
    return (IsNonNegative() && value < 0) ? 0 : value;
  }
  bool operator==(const CalculationValue& o) const {
    return Pixels() == o.Pixels() && Percent() == o.Percent();
  }
  bool IsNonNegative() const { return is_non_negative_; }
  ValueRange GetValueRange() const {
    return is_non_negative_ ? kValueRangeNonNegative : kValueRangeAll;
  }
  float Pixels() const { return value_.pixels; }
  float Percent() const { return value_.percent; }
  PixelsAndPercent GetPixelsAndPercent() const { return value_; }

 private:
  CalculationValue(PixelsAndPercent value, ValueRange range)
      : value_(value), is_non_negative_(range == kValueRangeNonNegative) {}

  PixelsAndPercent value_;
  bool is_non_negative_;
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_GEOMETRY_CALCULATION_VALUE_H_