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      1 /*
      2     Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      3     Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
      4     Copyright (c) 2012, Google Inc. All rights reserved.
      5 
      6     This library is free software; you can redistribute it and/or
      7     modify it under the terms of the GNU Library General Public
      8     License as published by the Free Software Foundation; either
      9     version 2 of the License, or (at your option) any later version.
     10 
     11     This library is distributed in the hope that it will be useful,
     12     but WITHOUT ANY WARRANTY; without even the implied warranty of
     13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14     Library General Public License for more details.
     15 
     16     You should have received a copy of the GNU Library General Public License
     17     along with this library; see the file COPYING.LIB.  If not, write to
     18     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     19     Boston, MA 02110-1301, USA.
     20 */
     21 
     22 #ifndef LengthBox_h
     23 #define LengthBox_h
     24 
     25 #include "platform/Length.h"
     26 #include "platform/PlatformExport.h"
     27 #include "platform/text/TextDirection.h"
     28 #include "platform/text/WritingMode.h"
     29 
     30 namespace WebCore {
     31 
     32 class RenderStyle;
     33 
     34 class PLATFORM_EXPORT LengthBox {
     35 public:
     36     LengthBox()
     37     {
     38     }
     39 
     40     LengthBox(LengthType t)
     41         : m_left(t)
     42         , m_right(t)
     43         , m_top(t)
     44         , m_bottom(t)
     45     {
     46     }
     47 
     48     LengthBox(int v)
     49         : m_left(Length(v, Fixed))
     50         , m_right(Length(v, Fixed))
     51         , m_top(Length(v, Fixed))
     52         , m_bottom(Length(v, Fixed))
     53     {
     54     }
     55 
     56     LengthBox(Length t, Length r, Length b, Length l)
     57         : m_left(l)
     58         , m_right(r)
     59         , m_top(t)
     60         , m_bottom(b)
     61     {
     62     }
     63 
     64     LengthBox(int t, int r, int b, int l)
     65         : m_left(Length(l, Fixed))
     66         , m_right(Length(r, Fixed))
     67         , m_top(Length(t, Fixed))
     68         , m_bottom(Length(b, Fixed))
     69     {
     70     }
     71 
     72     Length left() const { return m_left; }
     73     Length right() const { return m_right; }
     74     Length top() const { return m_top; }
     75     Length bottom() const { return m_bottom; }
     76 
     77     Length logicalLeft(WritingMode) const;
     78     Length logicalRight(WritingMode) const;
     79 
     80     Length before(WritingMode) const;
     81     Length after(WritingMode) const;
     82     Length start(WritingMode, TextDirection) const;
     83     Length end(WritingMode, TextDirection) const;
     84 
     85     bool operator==(const LengthBox& o) const
     86     {
     87         return m_left == o.m_left && m_right == o.m_right && m_top == o.m_top && m_bottom == o.m_bottom;
     88     }
     89 
     90     bool operator!=(const LengthBox& o) const
     91     {
     92         return !(*this == o);
     93     }
     94 
     95     bool nonZero() const
     96     {
     97         return !(m_left.isZero() && m_right.isZero() && m_top.isZero() && m_bottom.isZero());
     98     }
     99 
    100     // Must be public for SET_VAR in RenderStyle.h
    101     Length m_left;
    102     Length m_right;
    103     Length m_top;
    104     Length m_bottom;
    105 };
    106 
    107 } // namespace WebCore
    108 
    109 #endif // LengthBox_h
    110