text: /*
   * 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_
  