WebCore/rendering/style/TranslateTransformOperation.cpp

   1 /*
   2  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
   3  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Library General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Library General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Library General Public License
  16  * along with this library; see the file COPYING.LIB.  If not, write to
  17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  18  * Boston, MA 02110-1301, USA.
  19  *
  20  */
  21
  22 #include "config.h"
  23 #include "TranslateTransformOperation.h"
  24
  25 namespace WebCore {
  26
  27 PassRefPtr<TransformOperation> TranslateTransformOperation::blend(const TransformOperation* from, double progress, bool blendToIdentity)
  28 {
  29     if (from && !from->isSameType(*this))
  30         return this;
  31
  32     if (blendToIdentity)
  33         return TranslateTransformOperation::create(Length(m_x.type()).blend(m_x, progress), Length(m_y.type()).blend(m_y, progress), m_type);
  34
  35     const TranslateTransformOperation* fromOp = static_cast<const TranslateTransformOperation*>(from);
  36     Length fromX = fromOp ? fromOp->m_x : Length(m_x.type());
  37     Length fromY = fromOp ? fromOp->m_y : Length(m_y.type());
  38     return TranslateTransformOperation::create(m_x.blend(fromX, progress), m_y.blend(fromY, progress), m_type);
  39 }
  40
  41 } // namespace WebCore