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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSSOM_CSS_UNIT_VALUE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSSOM_CSS_UNIT_VALUE_H_
#include "third_party/blink/renderer/core/css/css_numeric_literal_value.h"
#include "third_party/blink/renderer/core/css/cssom/css_numeric_value.h"
#include "third_party/blink/renderer/platform/wtf/casting.h"
namespace blink {
// Represents numeric values that can be expressed as a single number plus a
// unit (or a naked number or percentage).
// See CSSUnitValue.idl for more information about this class.
class CORE_EXPORT CSSUnitValue final : public CSSNumericValue {
DEFINE_WRAPPERTYPEINFO();
public:
// The constructor defined in the IDL.
static CSSUnitValue* Create(double value,
const String& unit,
ExceptionState&);
// Blink-internal ways of creating CSSUnitValues.
static CSSUnitValue* Create(
double value,
CSSPrimitiveValue::UnitType = CSSPrimitiveValue::UnitType::kNumber);
static CSSUnitValue* FromCSSValue(const CSSNumericLiteralValue&);
CSSUnitValue(double value, CSSPrimitiveValue::UnitType unit)
: CSSNumericValue(CSSNumericValueType(unit)),
value_(value),
unit_(unit) {}
CSSUnitValue(const CSSUnitValue&) = delete;
CSSUnitValue& operator=(const CSSUnitValue&) = delete;
// Setters and getters for attributes defined in the IDL.
void setValue(double new_value) { value_ = new_value; }
double value() const { return value_; }
String unit() const;
// Internal methods.
CSSPrimitiveValue::UnitType GetInternalUnit() const { return unit_; }
CSSUnitValue* ConvertTo(CSSPrimitiveValue::UnitType) const;
// From CSSNumericValue.
bool IsUnitValue() const final { return true; }
absl::optional<CSSNumericSumValue> SumValue() const final;
bool Equals(const CSSNumericValue&) const final;
// From CSSStyleValue.
StyleValueType GetType() const final;
const CSSNumericLiteralValue* ToCSSValue() const final;
const CSSPrimitiveValue* ToCSSValueWithProperty(CSSPropertyID) const final;
CSSMathExpressionNode* ToCalcExpressionNode() const final;
private:
double ConvertFixedLength(CSSPrimitiveValue::UnitType) const;
double ConvertAngle(CSSPrimitiveValue::UnitType) const;
void BuildCSSText(Nested, ParenLess, StringBuilder&) const final;
// From CSSNumericValue
CSSNumericValue* Negate() final;
CSSNumericValue* Invert() final;
double value_;
CSSPrimitiveValue::UnitType unit_;
};
template <>
struct DowncastTraits<CSSUnitValue> {
static bool AllowFrom(const CSSStyleValue& value) {
return value.GetType() == CSSStyleValue::StyleValueType::kUnitType;
}
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSSOM_CSS_UNIT_VALUE_H_
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