| /* |
| * 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 |
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| * (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 "core/CoreExport.h" |
| #include "core/css/CSSPrimitiveValue.h" |
| #include "core/css/CSSValue.h" |
| #include "core/css/parser/CSSParserTokenRange.h" |
| #include "platform/CalculationValue.h" |
| #include "wtf/Forward.h" |
| |
| namespace blink { |
| |
| class CalculationValue; |
| |
| enum CalcOperator { |
| CalcAdd = '+', |
| CalcSubtract = '-', |
| CalcMultiply = '*', |
| CalcDivide = '/' |
| }; |
| |
| // The order of this enum should not change since its elements are used as |
| // indices in the addSubtractResult matrix. |
| enum CalculationCategory { |
| CalcNumber = 0, |
| CalcLength, |
| CalcPercent, |
| CalcPercentNumber, |
| CalcPercentLength, |
| CalcAngle, |
| CalcTime, |
| CalcFrequency, |
| CalcLengthNumber, |
| CalcPercentLengthNumber, |
| CalcOther |
| }; |
| |
| class CSSCalcExpressionNode : public GarbageCollected<CSSCalcExpressionNode> { |
| public: |
| enum Type { CssCalcPrimitiveValue = 1, CssCalcBinaryOperation }; |
| |
| virtual bool isZero() const = 0; |
| virtual double doubleValue() const = 0; |
| virtual double computeLengthPx(const CSSToLengthConversionData&) const = 0; |
| virtual void accumulateLengthArray(CSSLengthArray&, |
| double multiplier) const = 0; |
| virtual void accumulatePixelsAndPercent(const CSSToLengthConversionData&, |
| PixelsAndPercent&, |
| float multiplier = 1) 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 getType() const = 0; |
| |
| CalculationCategory category() const { return m_category; } |
| virtual CSSPrimitiveValue::UnitType typeWithCalcResolved() const = 0; |
| bool isInteger() const { return m_isInteger; } |
| |
| DEFINE_INLINE_VIRTUAL_TRACE() {} |
| |
| protected: |
| CSSCalcExpressionNode(CalculationCategory category, bool isInteger) |
| : m_category(category), m_isInteger(isInteger) { |
| ASSERT(category != CalcOther); |
| } |
| |
| CalculationCategory m_category; |
| bool m_isInteger; |
| }; |
| |
| class CORE_EXPORT CSSCalcValue : public GarbageCollected<CSSCalcValue> { |
| public: |
| static CSSCalcValue* create(const CSSParserTokenRange&, ValueRange); |
| static CSSCalcValue* create(CSSCalcExpressionNode*, |
| ValueRange = ValueRangeAll); |
| |
| static CSSCalcExpressionNode* createExpressionNode(CSSPrimitiveValue*, |
| bool isInteger = false); |
| static CSSCalcExpressionNode* createExpressionNode(CSSCalcExpressionNode*, |
| CSSCalcExpressionNode*, |
| CalcOperator); |
| static CSSCalcExpressionNode* createExpressionNode(double pixels, |
| double percent); |
| |
| PassRefPtr<CalculationValue> toCalcValue( |
| const CSSToLengthConversionData& conversionData) const { |
| PixelsAndPercent value(0, 0); |
| m_expression->accumulatePixelsAndPercent(conversionData, value); |
| return CalculationValue::create( |
| value, m_nonNegative ? ValueRangeNonNegative : ValueRangeAll); |
| } |
| 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; } |
| ValueRange permittedValueRange() { |
| return m_nonNegative ? ValueRangeNonNegative : ValueRangeAll; |
| } |
| double computeLengthPx(const CSSToLengthConversionData&) const; |
| void accumulateLengthArray(CSSLengthArray& lengthArray, |
| double multiplier) const { |
| m_expression->accumulateLengthArray(lengthArray, multiplier); |
| } |
| CSSCalcExpressionNode* expressionNode() const { return m_expression.get(); } |
| |
| String customCSSText() const; |
| bool equals(const CSSCalcValue&) const; |
| |
| DEFINE_INLINE_TRACE() { visitor->trace(m_expression); } |
| |
| private: |
| CSSCalcValue(CSSCalcExpressionNode* expression, ValueRange range) |
| : m_expression(expression), |
| m_nonNegative(range == ValueRangeNonNegative) {} |
| |
| double clampToPermittedRange(double) const; |
| |
| const Member<CSSCalcExpressionNode> m_expression; |
| const bool m_nonNegative; |
| }; |
| |
| } // namespace blink |
| |
| #endif // CSSCalculationValue_h |