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/*
* Copyright (C) 2011 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 CalculationValue_h
#define CalculationValue_h
#include "platform/Length.h"
#include "platform/LengthFunctions.h"
#include "wtf/OwnPtr.h"
#include "wtf/PassOwnPtr.h"
#include "wtf/RefCounted.h"
namespace blink {
class PLATFORM_EXPORT CalculationValue : public RefCounted<CalculationValue> {
public:
static PassRefPtr<CalculationValue> create(PixelsAndPercent value, ValueRange range)
{
return adoptRef(new CalculationValue(value, range));
}
float evaluate(float maxValue) const
{
float value = pixels() + percent() / 100 * maxValue;
return (isNonNegative() && value < 0) ? 0 : value;
}
bool operator==(const CalculationValue& o) const { return pixels() == o.pixels() && percent() == o.percent(); }
bool isNonNegative() const { return m_isNonNegative; }
ValueRange valueRange() const { return m_isNonNegative ? ValueRangeNonNegative : ValueRangeAll; }
float pixels() const { return m_value.pixels; }
float percent() const { return m_value.percent; }
PixelsAndPercent pixelsAndPercent() const { return m_value; }
private:
CalculationValue(PixelsAndPercent value, ValueRange range)
: m_value(value)
, m_isNonNegative(range == ValueRangeNonNegative)
{
}
PixelsAndPercent m_value;
bool m_isNonNegative;
};
} // namespace blink
#endif // CalculationValue_h
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