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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 "CSSValue.h"
#include "CalculationValue.h"
#include <wtf/PassOwnPtr.h>
#include <wtf/RefCounted.h>
#include <wtf/RefPtr.h>
namespace WebCore {
class CSSParserValueList;
class CSSValueList;
class CalculationValue;
class CalcExpressionNode;
class RenderStyle;
struct Length;
enum CalculationCategory {
CalcNumber = 0,
CalcLength,
CalcPercent,
CalcPercentNumber,
CalcPercentLength,
CalcOther
};
class CSSCalcExpressionNode : public RefCounted<CSSCalcExpressionNode> {
public:
enum Type {
CssCalcPrimitiveValue = 1,
CssCalcBinaryOperation
};
virtual ~CSSCalcExpressionNode() = 0;
virtual bool isZero() const = 0;
virtual PassOwnPtr<CalcExpressionNode> toCalcValue(const RenderStyle*, const RenderStyle* rootStyle, double zoom = 1.0) const = 0;
virtual double doubleValue() const = 0;
virtual double computeLengthPx(const RenderStyle* currentStyle, const RenderStyle* rootStyle, double multiplier = 1.0, bool computingFontSize = false) 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;
CalculationCategory category() const { return m_category; }
virtual CSSPrimitiveValue::UnitTypes primitiveType() const = 0;
bool isInteger() const { return m_isInteger; }
protected:
CSSCalcExpressionNode(CalculationCategory category, bool isInteger)
: m_category(category)
, m_isInteger(isInteger)
{
}
CalculationCategory m_category;
bool m_isInteger;
};
class CSSCalcValue : public CSSValue {
public:
static PassRefPtr<CSSCalcValue> create(CSSParserString name, CSSParserValueList*, CalculationPermittedValueRange);
static PassRef<CSSCalcValue> create(PassRefPtr<CSSCalcExpressionNode>, CalculationPermittedValueRange = CalculationRangeAll);
static PassRef<CSSCalcValue> create(const CalculationValue* value, const RenderStyle* style) { return adoptRef(*new CSSCalcValue(value, style)); }
static PassRefPtr<CSSCalcExpressionNode> createExpressionNode(PassRefPtr<CSSPrimitiveValue>, bool isInteger = false);
static PassRefPtr<CSSCalcExpressionNode> createExpressionNode(PassRefPtr<CSSCalcExpressionNode>, PassRefPtr<CSSCalcExpressionNode>, CalcOperator);
static PassRefPtr<CSSCalcExpressionNode> createExpressionNode(const CalcExpressionNode*, const RenderStyle*);
static PassRefPtr<CSSCalcExpressionNode> createExpressionNode(const Length&, const RenderStyle*);
PassRefPtr<CalculationValue> toCalcValue(const RenderStyle* style, const RenderStyle* rootStyle, double zoom = 1.0) const
{
return CalculationValue::create(m_expression->toCalcValue(style, rootStyle, zoom), m_nonNegative ? CalculationRangeNonNegative : CalculationRangeAll);
}
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; }
CalculationPermittedValueRange permittedValueRange() { return m_nonNegative ? CalculationRangeNonNegative : CalculationRangeAll; }
double computeLengthPx(const RenderStyle* currentStyle, const RenderStyle* rootStyle, double multiplier = 1.0, bool computingFontSize = false) const;
CSSCalcExpressionNode* expressionNode() const { return m_expression.get(); }
String customCSSText() const;
bool equals(const CSSCalcValue&) const;
private:
CSSCalcValue(PassRefPtr<CSSCalcExpressionNode> expression, CalculationPermittedValueRange range)
: CSSValue(CalculationClass)
, m_expression(expression)
, m_nonNegative(range == CalculationRangeNonNegative)
{
}
CSSCalcValue(const CalculationValue* value, const RenderStyle* style)
: CSSValue(CalculationClass)
, m_expression(createExpressionNode(value->expression(), style))
, m_nonNegative(value->isNonNegative())
{
}
double clampToPermittedRange(double) const;
const RefPtr<CSSCalcExpressionNode> m_expression;
const bool m_nonNegative;
};
CSS_VALUE_TYPE_CASTS(CSSCalcValue, isCalcValue())
} // namespace WebCore
#endif // CSSCalculationValue_h
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