blob: 1e78f4a24ee0af1e87fce82491a2a5f4c0aa927d [file] [log] [blame]
/*
* Copyright (C) 2011, 2012 Google Inc. 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,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "CSSPrimitiveValue.h"
#include "CSSPropertyNames.h"
#include "CalculationValue.h"
namespace WTF {
class TextStream;
}
namespace WebCore {
class CSSParserTokenRange;
class CSSToLengthConversionData;
class RenderStyle;
// FIXME: Unify with CSSPrimitiveValue::UnitCategory.
enum class CalculationCategory : uint8_t {
Number = 0,
Length,
Percent,
PercentNumber,
PercentLength,
Angle,
Time,
Frequency,
// TODO:
// Flex,
// Resolution
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&);
} // namespace WebCore
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()