text: /*
   * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
   * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Library General Public
   * License as published by the Free Software Foundation; either
   * version 2 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Library General Public License for more details.
   *
   * You should have received a copy of the GNU Library General Public License
   * along with this library; see the file COPYING.LIB.  If not, write to
   * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   * Boston, MA 02110-1301, USA.
   *
   */
  
  #include "config.h"
  #include "platform/transforms/TranslateTransformOperation.h"
  
  namespace blink {
  
  PassRefPtr<TransformOperation> TranslateTransformOperation::blend(const TransformOperation* from, double progress, bool blendToIdentity)
  {
      if (from && !from->canBlendWith(*this))
          return this;
  
      const Length zeroLength(0, Fixed);
      if (blendToIdentity)
          return TranslateTransformOperation::create(zeroLength.blend(m_x, progress, ValueRangeAll), zeroLength.blend(m_y, progress, ValueRangeAll), blink::blend(0., m_z, progress), m_type);
  
      const TranslateTransformOperation* fromOp = static_cast<const TranslateTransformOperation*>(from);
      Length fromX = fromOp ? fromOp->m_x : zeroLength;
      Length fromY = fromOp ? fromOp->m_y : zeroLength;
      double fromZ = fromOp ? fromOp->m_z : 0;
      return TranslateTransformOperation::create(m_x.blend(fromX, progress, ValueRangeAll), m_y.blend(fromY, progress, ValueRangeAll), blink::blend(fromZ, m_z, progress), m_type);
  }
  
  bool TranslateTransformOperation::canBlendWith(const TransformOperation& other) const
  {
      return other.type() == Translate
          || other.type() == TranslateX
          || other.type() == TranslateY
          || other.type() == TranslateZ
          || other.type() == Translate3D;
  }
  
  } // namespace blink
  