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/*
* 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.
*/
#ifndef CSSCalculationValue_h
#define CSSCalculationValue_h
#include "CSSParserValues.h"
#include "CSSPrimitiveValue.h"
#include "CalculationValue.h"
namespace WebCore {
class CSSToLengthConversionData;
class RenderStyle;
enum CalculationCategory {
CalcNumber = 0,
CalcLength,
CalcPercent,
CalcPercentNumber,
CalcPercentLength,
CalcAngle,
CalcTime,
CalcFrequency,
CalcOther
};
class CSSCalcExpressionNode : public RefCounted<CSSCalcExpressionNode> {
public:
enum Type {
CssCalcPrimitiveValue = 1,
CssCalcBinaryOperation
};
virtual ~CSSCalcExpressionNode() { }
virtual bool isZero() const = 0;
virtual std::unique_ptr<CalcExpressionNode> createCalcExpression(const CSSToLengthConversionData&) const = 0;
virtual double doubleValue() const = 0;
virtual double computeLengthPx(const CSSToLengthConversionData&) const = 0;
virtual String customCSSText() const = 0;
virtual bool equals(const CSSCalcExpressionNode& other) const { return m_category == other.m_category && m_isInteger == other.m_isInteger; }
virtual Type type() const = 0;
virtual CSSPrimitiveValue::UnitTypes primitiveType() const = 0;
CalculationCategory category() const { return m_category; }
bool isInteger() const { return m_isInteger; }
protected:
CSSCalcExpressionNode(CalculationCategory category, bool isInteger)
: m_category(category)
, m_isInteger(isInteger)
{
}
private:
CalculationCategory m_category;
bool m_isInteger;
};
class CSSCalcValue : public CSSValue {
public:
static PassRefPtr<CSSCalcValue> create(CSSParserString name, CSSParserValueList& arguments, CalculationPermittedValueRange);
static PassRefPtr<CSSCalcValue> create(const CalculationValue&, const RenderStyle&);
CalculationCategory category() const { return m_expression->category(); }
bool isInt() const { return m_expression->isInteger(); }
double doubleValue() const;
bool isNegative() const { return m_expression->doubleValue() < 0; }
double computeLengthPx(const CSSToLengthConversionData&) const;
PassRef<CalculationValue> createCalculationValue(const CSSToLengthConversionData&) const;
String customCSSText() const;
bool equals(const CSSCalcValue&) const;
private:
CSSCalcValue(PassRef<CSSCalcExpressionNode>, bool shouldClampToNonNegative);
double clampToPermittedRange(double) const;
const Ref<CSSCalcExpressionNode> m_expression;
const bool m_shouldClampToNonNegative;
};
inline CSSCalcValue::CSSCalcValue(PassRef<CSSCalcExpressionNode> expression, bool shouldClampToNonNegative)
: CSSValue(CalculationClass)
, m_expression(WTF::move(expression))
, m_shouldClampToNonNegative(shouldClampToNonNegative)
{
}
inline PassRef<CalculationValue> CSSCalcValue::createCalculationValue(const CSSToLengthConversionData& conversionData) const
{
return CalculationValue::create(m_expression->createCalcExpression(conversionData),
m_shouldClampToNonNegative ? CalculationRangeNonNegative : CalculationRangeAll);
}
CSS_VALUE_TYPE_CASTS(CSSCalcValue, isCalcValue())
} // namespace WebCore
#endif // CSSCalculationValue_h
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