| /* |
| * 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, |
| #if ENABLE(CSS_VARIABLES) |
| CalcVariable, |
| #endif |
| 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; |
| #if ENABLE(CSS_VARIABLES) |
| virtual String serializeResolvingVariables(const HashMap<AtomicString, String>&) const = 0; |
| virtual bool hasVariableReference() const = 0; |
| #endif |
| 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 PassRefPtr<CSSCalcValue> create(PassRefPtr<CSSCalcExpressionNode>, CalculationPermittedValueRange = CalculationRangeAll); |
| static PassRefPtr<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; |
| #if ENABLE(CSS_VARIABLES) |
| String customSerializeResolvingVariables(const HashMap<AtomicString, String>&) const; |
| bool hasVariableReference() const; |
| #endif |
| |
| 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 |