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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 friend class RenderStyle;
     35 public:
     36     BorderValue()
     37         : m_width(3)
     38         , m_style(BNONE)
     39     {
     40     }
     41 
     42     bool nonZero(bool checkStyle = true) const
     43     {
     44         return width() && (!checkStyle || m_style != BNONE);
     45     }
     46 
     47     bool isTransparent() const
     48     {
     49         return m_color.isValid() && !m_color.alpha();
     50     }
     51 
     52     bool isVisible(bool checkStyle = true) const
     53     {
     54         return nonZero(checkStyle) && !isTransparent() && (!checkStyle || m_style != BHIDDEN);
     55     }
     56 
     57     bool operator==(const BorderValue& o) const
     58     {
     59         return m_width == o.m_width && m_style == o.m_style && m_color == o.m_color;
     60     }
     61 
     62     bool operator!=(const BorderValue& o) const
     63     {
     64         return !(*this == o);
     65     }
     66 
     67     const Color& color() const { return m_color; }
     68     unsigned short width() const { return m_width; }
     69     EBorderStyle style() const { return static_cast<EBorderStyle>(m_style); }
     70 
     71 protected:
     72     Color m_color;
     73     unsigned m_width : 12;
     74     unsigned m_style : 4; // EBorderStyle
     75 };
     76 
     77 } // namespace WebCore
     78 
     79 #endif // BorderValue_h
     80