WebCore/TranslateTransformOperation.h

   1 /*
   2  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
   3  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
   4  *           (C) 2000 Dirk Mueller (mueller@kde.org)
   5  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
   6  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Library General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Library General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Library General Public License
  19  * along with this library; see the file COPYING.LIB.  If not, write to
  20  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  21  * Boston, MA 02110-1301, USA.
  22  *
  23  */
  24
  25 #ifndef TranslateTransformOperation_h
  26 #define TranslateTransformOperation_h
  27
  28 #include "Length.h"
  29 #include "TransformOperation.h"
  30
  31 namespace WebCore {
  32
  33 class TranslateTransformOperation : public TransformOperation {
  34 public:
  35     static PassRefPtr<TranslateTransformOperation> create(const Length& tx, const Length& ty, OperationType type)
  36     {
  37         return adoptRef(new TranslateTransformOperation(tx, ty, Length(0, Fixed), type));
  38     }
  39
  40     static PassRefPtr<TranslateTransformOperation> create(const Length& tx, const Length& ty, const Length& tz, OperationType type)
  41     {
  42         return adoptRef(new TranslateTransformOperation(tx, ty, tz, type));
  43     }
  44
  45     double x(const IntSize& borderBoxSize) const { return m_x.calcFloatValue(borderBoxSize.width()); }
  46     double y(const IntSize& borderBoxSize) const { return m_y.calcFloatValue(borderBoxSize.height()); }
  47     double z(const IntSize&) const { return m_z.calcFloatValue(1); }
  48
  49 private:
  50     virtual bool isIdentity() const { return m_x.calcFloatValue(1) == 0 && m_y.calcFloatValue(1) == 0 && m_z.calcFloatValue(1) == 0; }
  51
  52     virtual OperationType getOperationType() const { return m_type; }
  53     virtual bool isSameType(const TransformOperation& o) const { return o.getOperationType() == m_type; }
  54
  55     virtual bool operator==(const TransformOperation& o) const
  56     {
  57         if (!isSameType(o))
  58             return false;
  59         const TranslateTransformOperation* t = static_cast<const TranslateTransformOperation*>(&o);
  60         return m_x == t->m_x && m_y == t->m_y && m_z == t->m_z;
  61     }
  62
  63     virtual bool apply(TransformationMatrix& transform, const IntSize& borderBoxSize) const
  64     {
  65         transform.translate3d(x(borderBoxSize), y(borderBoxSize), z(borderBoxSize));
  66         return m_x.type() == Percent || m_y.type() == Percent;
  67     }
  68
  69     virtual PassRefPtr<TransformOperation> blend(const TransformOperation* from, double progress, bool blendToIdentity = false);
  70
  71     TranslateTransformOperation(const Length& tx, const Length& ty, const Length& tz, OperationType type)
  72         : m_x(tx)
  73         , m_y(ty)
  74         , m_z(tz)
  75         , m_type(type)
  76     {
  77         ASSERT(type == TRANSLATE_X || type == TRANSLATE_Y || type == TRANSLATE_Z || type == TRANSLATE || type == TRANSLATE_3D);
  78     }
  79
  80     Length m_x;
  81     Length m_y;
  82     Length m_z;
  83     OperationType m_type;
  84 };
  85
  86 } // namespace WebCore
  87
  88 #endif // TranslateTransformOperation_h