WebCore/BorderValue.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 BorderValue_h
  26 #define BorderValue_h
  27
  28 #include "Color.h"
  29 #include "RenderStyleConstants.h"
  30
  31 namespace WebCore {
  32
  33 class BorderValue {
  34 public:
  35     BorderValue()
  36         : width(3)
  37         , m_style(BNONE)
  38     {
  39     }
  40
  41     Color color;
  42     unsigned width : 12;
  43     unsigned m_style : 4; // EBorderStyle
  44
  45     EBorderStyle style() const { return static_cast<EBorderStyle>(m_style); }
  46
  47     bool nonZero(bool checkStyle = true) const
  48     {
  49         return width != 0 && (!checkStyle || m_style != BNONE);
  50     }
  51
  52     bool isTransparent() const
  53     {
  54         return color.isValid() && color.alpha() == 0;
  55     }
  56
  57     bool isVisible(bool checkStyle = true) const
  58     {
  59         return nonZero(checkStyle) && !isTransparent() && (!checkStyle || m_style != BHIDDEN);
  60     }
  61
  62     bool operator==(const BorderValue& o) const
  63     {
  64         return width == o.width && m_style == o.m_style && color == o.color;
  65     }
  66
  67     bool operator!=(const BorderValue& o) const
  68     {
  69         return !(*this == o);
  70     }
  71 };
  72
  73 } // namespace WebCore
  74
  75 #endif // BorderValue_h