third_party/WebKit/Source/core/layout/GapRects.h

   1 /*
   2     Copyright (C) 2005, 2006 Apple Inc. All rights reserved.
   3
   4     This library is free software; you can redistribute it and/or
   5     modify it under the terms of the GNU Library General Public
   6     License as published by the Free Software Foundation; either
   7     version 2 of the License, or (at your option) any later version.
   8
   9     This library is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12     Library General Public License for more details.
  13
  14     You should have received a copy of the GNU Library General Public License
  15     along with this library; see the file COPYING.LIB.  If not, write to
  16     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17     Boston, MA 02110-1301, USA.
  18
  19
  20     Some useful definitions needed for laying out elements
  21 */
  22
  23 #ifndef GapRects_h
  24 #define GapRects_h
  25
  26 #include "platform/geometry/LayoutRect.h"
  27 #include "wtf/Allocator.h"
  28
  29 namespace blink {
  30
  31 struct GapRects {
  32     STACK_ALLOCATED();
  33     const LayoutRect& left() const { return m_left; }
  34     const LayoutRect& center() const { return m_center; }
  35     const LayoutRect& right() const { return m_right; }
  36
  37     void uniteLeft(const LayoutRect& r) { m_left.unite(r); }
  38     void uniteCenter(const LayoutRect& r) { m_center.unite(r); }
  39     void uniteRight(const LayoutRect& r) { m_right.unite(r); }
  40     void unite(const GapRects& o) { uniteLeft(o.left()); uniteCenter(o.center()); uniteRight(o.right()); }
  41
  42     operator LayoutRect() const
  43     {
  44         LayoutRect result = m_left;
  45         result.unite(m_center);
  46         result.unite(m_right);
  47         return result;
  48     }
  49
  50     bool operator==(const GapRects& other)
  51     {
  52         return m_left == other.left() && m_center == other.center() && m_right == other.right();
  53     }
  54     bool operator!=(const GapRects& other) { return !(*this == other); }
  55
  56 private:
  57     LayoutRect m_left;
  58     LayoutRect m_center;
  59     LayoutRect m_right;
  60 };
  61
  62 } // namespace blink
  63
  64 #endif // GapRects_h