third_party/WebKit/Source/platform/LengthBox.h

   1 /*
   2     Copyright (C) 1999 Lars Knoll (knoll@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 blink {
  31
  32 class PLATFORM_EXPORT LengthBox {
  33 public:
  34     LengthBox()
  35     {
  36     }
  37
  38     LengthBox(LengthType t)
  39         : m_left(t)
  40         , m_right(t)
  41         , m_top(t)
  42         , m_bottom(t)
  43     {
  44     }
  45
  46     LengthBox(int v)
  47         : m_left(Length(v, Fixed))
  48         , m_right(Length(v, Fixed))
  49         , m_top(Length(v, Fixed))
  50         , m_bottom(Length(v, Fixed))
  51     {
  52     }
  53
  54     LengthBox(const Length& t, const Length& r, const Length& b, const Length& l)
  55         : m_left(l)
  56         , m_right(r)
  57         , m_top(t)
  58         , m_bottom(b)
  59     {
  60     }
  61
  62     LengthBox(int t, int r, int b, int l)
  63         : m_left(Length(l, Fixed))
  64         , m_right(Length(r, Fixed))
  65         , m_top(Length(t, Fixed))
  66         , m_bottom(Length(b, Fixed))
  67     {
  68     }
  69
  70     const Length& left() const { return m_left; }
  71     const Length& right() const { return m_right; }
  72     const Length& top() const { return m_top; }
  73     const Length& bottom() const { return m_bottom; }
  74
  75     const Length& logicalLeft(WritingMode) const;
  76     const Length& logicalRight(WritingMode) const;
  77
  78     const Length& before(WritingMode) const;
  79     const Length& after(WritingMode) const;
  80     const Length& start(WritingMode, TextDirection) const;
  81     const Length& end(WritingMode, TextDirection) const;
  82
  83     bool operator==(const LengthBox& o) const
  84     {
  85         return m_left == o.m_left && m_right == o.m_right && m_top == o.m_top && m_bottom == o.m_bottom;
  86     }
  87
  88     bool operator!=(const LengthBox& o) const
  89     {
  90         return !(*this == o);
  91     }
  92
  93     bool nonZero() const
  94     {
  95         return !(m_left.isZero() && m_right.isZero() && m_top.isZero() && m_bottom.isZero());
  96     }
  97
  98     // Must be public for SET_VAR in ComputedStyle.h
  99     Length m_left;
 100     Length m_right;
 101     Length m_top;
 102     Length m_bottom;
 103 };
 104
 105 } // namespace blink
 106
 107 #endif // LengthBox_h