text: /*
   * Copyright (C) 2013 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.
   */
  
  #include "config.h"
  #include "core/animation/animatable/AnimatableLength.h"
  
  #include "platform/CalculationValue.h"
  #include "platform/animation/AnimationUtilities.h"
  
  namespace blink {
  
  namespace {
  
  double clampNumber(double value, ValueRange range)
  {
      if (range == ValueRangeNonNegative)
          return std::max(value, 0.0);
      ASSERT(range == ValueRangeAll);
      return value;
  }
  
  } // namespace
  
  AnimatableLength::AnimatableLength(const Length& length)
  {
      PixelsAndPercent pixelsAndPercent = length.pixelsAndPercent();
      m_pixels = pixelsAndPercent.pixels;
      m_percent = pixelsAndPercent.percent;
      m_hasPixels = length.type() != Percent;
      m_hasPercent = !length.isFixed();
  }
  
  Length AnimatableLength::length(ValueRange range) const
  {
      if (!m_hasPercent)
          return Length(clampNumber(m_pixels, range), Fixed);
      if (!m_hasPixels)
          return Length(clampNumber(m_percent, range), Percent);
      return Length(CalculationValue::create(PixelsAndPercent(m_pixels, m_percent), range));
  }
  
  PassRefPtr<AnimatableValue> AnimatableLength::interpolateTo(const AnimatableValue* value, double fraction) const
  {
      const AnimatableLength* length = toAnimatableLength(value);
      return create(blend(m_pixels, length->m_pixels, fraction), blend(m_percent, length->m_percent, fraction),
          m_hasPixels || length->m_hasPixels, m_hasPercent || length->m_hasPercent);
  }
  
  bool AnimatableLength::equalTo(const AnimatableValue* value) const
  {
      const AnimatableLength* length = toAnimatableLength(value);
      return m_pixels == length->m_pixels && m_percent == length->m_percent && m_hasPixels == length->m_hasPixels && m_hasPercent == length->m_hasPercent;
  }
  
  } // namespace blink
  