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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 THIRD_PARTY_BLINK_RENDERER_PLATFORM_CALCULATION_VALUE_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_CALCULATION_VALUE_H_
#include "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/platform/length.h"
#include "third_party/blink/renderer/platform/length_functions.h"
#include "third_party/blink/renderer/platform/wtf/ref_counted.h"
namespace blink {
class PLATFORM_EXPORT CalculationValue : public RefCounted<CalculationValue> {
public:
static scoped_refptr<CalculationValue> Create(PixelsAndPercent value,
ValueRange range) {
return base::AdoptRef(new CalculationValue(value, range));
}
float Evaluate(float max_value) const {
float value = Pixels() + Percent() / 100 * max_value;
return (IsNonNegative() && value < 0) ? 0 : value;
}
bool operator==(const CalculationValue& o) const {
return Pixels() == o.Pixels() && Percent() == o.Percent();
}
bool IsNonNegative() const { return is_non_negative_; }
ValueRange GetValueRange() const {
return is_non_negative_ ? kValueRangeNonNegative : kValueRangeAll;
}
float Pixels() const { return value_.pixels; }
float Percent() const { return value_.percent; }
PixelsAndPercent GetPixelsAndPercent() const { return value_; }
private:
CalculationValue(PixelsAndPercent value, ValueRange range)
: value_(value), is_non_negative_(range == kValueRangeNonNegative) {}
PixelsAndPercent value_;
bool is_non_negative_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_CALCULATION_VALUE_H_
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