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      1 /*
      2  * Copyright (C) 2000 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 2000 Antti Koivisto (koivisto (at) kde.org)
      4  *           (C) 2000 Dirk Mueller (mueller (at) kde.org)
      5  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
      6  * Copyright (C) 2006 Graham Dennis (graham.dennis (at) 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
     76