CSSCalculationValue.h [plain text]
#pragma once
#include "CSSPrimitiveValue.h"
#include "CSSPropertyNames.h"
#include "CalculationValue.h"
namespace WTF {
class TextStream;
}
namespace WebCore {
class CSSParserTokenRange;
class CSSToLengthConversionData;
class RenderStyle;
enum class CalculationCategory : uint8_t {
Number = 0,
Length,
Percent,
PercentNumber,
PercentLength,
Angle,
Time,
Frequency,
Other
};
class CSSCalcExpressionNode : public RefCounted<CSSCalcExpressionNode> {
public:
enum Type {
CssCalcPrimitiveValue = 1,
CssCalcOperation,
CssCalcNegate,
CssCalcInvert,
};
virtual ~CSSCalcExpressionNode() = default;
virtual bool isZero() const = 0;
virtual std::unique_ptr<CalcExpressionNode> createCalcExpression(const CSSToLengthConversionData&) const = 0;
virtual double doubleValue(CSSUnitType) const = 0;
virtual double computeLengthPx(const CSSToLengthConversionData&) const = 0;
virtual bool equals(const CSSCalcExpressionNode& other) const { return m_category == other.m_category; }
virtual Type type() const = 0;
virtual CSSUnitType primitiveType() const = 0;
virtual void collectDirectComputationalDependencies(HashSet<CSSPropertyID>&) const = 0;
virtual void collectDirectRootComputationalDependencies(HashSet<CSSPropertyID>&) const = 0;
CalculationCategory category() const { return m_category; }
virtual void dump(TextStream&) const = 0;
protected:
CSSCalcExpressionNode(CalculationCategory category)
: m_category(category)
{
}
private:
CalculationCategory m_category;
};
class CSSCalcValue final : public CSSValue {
public:
static RefPtr<CSSCalcValue> create(CSSValueID function, const CSSParserTokenRange&, CalculationCategory destinationCategory, ValueRange);
static RefPtr<CSSCalcValue> create(const CalculationValue&, const RenderStyle&);
CalculationCategory category() const { return m_expression->category(); }
double doubleValue() const;
double computeLengthPx(const CSSToLengthConversionData&) const;
CSSUnitType primitiveType() const { return m_expression->primitiveType(); }
Ref<CalculationValue> createCalculationValue(const CSSToLengthConversionData&) const;
void setPermittedValueRange(ValueRange);
void collectDirectComputationalDependencies(HashSet<CSSPropertyID>&) const;
void collectDirectRootComputationalDependencies(HashSet<CSSPropertyID>&) const;
String customCSSText() const;
bool equals(const CSSCalcValue&) const;
static bool isCalcFunction(CSSValueID);
void dump(TextStream&) const;
private:
CSSCalcValue(Ref<CSSCalcExpressionNode>&&, bool shouldClampToNonNegative);
double clampToPermittedRange(double) const;
const Ref<CSSCalcExpressionNode> m_expression;
bool m_shouldClampToNonNegative;
};
inline CSSCalcValue::CSSCalcValue(Ref<CSSCalcExpressionNode>&& expression, bool shouldClampToNonNegative)
: CSSValue(CalculationClass)
, m_expression(WTFMove(expression))
, m_shouldClampToNonNegative(shouldClampToNonNegative)
{
}
inline Ref<CalculationValue> CSSCalcValue::createCalculationValue(const CSSToLengthConversionData& conversionData) const
{
return CalculationValue::create(m_expression->createCalcExpression(conversionData),
m_shouldClampToNonNegative ? ValueRangeNonNegative : ValueRangeAll);
}
inline void CSSCalcValue::setPermittedValueRange(ValueRange range)
{
m_shouldClampToNonNegative = range != ValueRangeAll;
}
inline void CSSCalcValue::collectDirectComputationalDependencies(HashSet<CSSPropertyID>& values) const
{
m_expression->collectDirectComputationalDependencies(values);
}
inline void CSSCalcValue::collectDirectRootComputationalDependencies(HashSet<CSSPropertyID>& values) const
{
m_expression->collectDirectRootComputationalDependencies(values);
}
WTF::TextStream& operator<<(WTF::TextStream&, CalculationCategory);
WTF::TextStream& operator<<(WTF::TextStream&, const CSSCalcValue&);
}
SPECIALIZE_TYPE_TRAITS_CSS_VALUE(CSSCalcValue, isCalcValue())
#define SPECIALIZE_TYPE_TRAITS_CSSCALCEXPRESSION_NODE(ToValueTypeName, predicate) \
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::ToValueTypeName) \
static bool isType(const WebCore::CSSCalcExpressionNode& node) { return node.predicate; } \
SPECIALIZE_TYPE_TRAITS_END()