1 /* 2 * Copyright (C) 2011 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef CalculationValue_h 32 #define CalculationValue_h 33 34 #include "platform/Length.h" 35 #include "platform/LengthFunctions.h" 36 #include "wtf/OwnPtr.h" 37 #include "wtf/PassOwnPtr.h" 38 #include "wtf/RefCounted.h" 39 40 namespace blink { 41 42 class PLATFORM_EXPORT CalculationValue : public RefCounted<CalculationValue> { 43 public: 44 static PassRefPtr<CalculationValue> create(PixelsAndPercent value, ValueRange range) 45 { 46 return adoptRef(new CalculationValue(value, range)); 47 } 48 49 float evaluate(float maxValue) const { return pixels() + percent() / 100 * maxValue; } 50 bool operator==(const CalculationValue& o) const { return pixels() == o.pixels() && percent() == o.percent(); } 51 bool isNonNegative() const { return m_isNonNegative; } 52 float pixels() const { return m_value.pixels; } 53 float percent() const { return m_value.percent; } 54 PixelsAndPercent pixelsAndPercent() const { return m_value; } 55 56 private: 57 CalculationValue(PixelsAndPercent value, ValueRange range) 58 : m_value(value) 59 , m_isNonNegative(range == ValueRangeNonNegative) 60 { 61 } 62 63 PixelsAndPercent m_value; 64 bool m_isNonNegative; 65 }; 66 67 } // namespace blink 68 69 #endif // CalculationValue_h 70
