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BoxExtend.h
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C/C++ Source or Header
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1998-03-25
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4KB
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137 lines
// $Id: BoxExtend.h,v 1.10 1998/03/25 12:42:25 zeller Exp $ -*- C++ -*-
// BoxExtend class
// Copyright (C) 1995 Technische Universitaet Braunschweig, Germany.
// Written by Andreas Zeller <zeller@ips.cs.tu-bs.de>.
//
// This file is part of DDD.
//
// DDD is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// DDD is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public
// License along with DDD -- see the file COPYING.
// If not, write to the Free Software Foundation, Inc.,
// 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// DDD is the data display debugger.
// For details, see the DDD World-Wide-Web page,
// `http://www.cs.tu-bs.de/softech/ddd/',
// or send a mail to the DDD developers <ddd@ips.cs.tu-bs.de>.
#ifndef _DDD_BoxExtend_h
#define _DDD_BoxExtend_h
#ifdef __GNUG__
#pragma interface
#endif
// A `BoxExtend' denotes the extensibility of a box - that is, how
// much the box extends to fill up available space. An extensibility
// of 0 means that the box will not extend at all. The bigger the
// extensibility, the more remaining space is assigned to the box.
// For example, let A and B be two boxes; A has a horizontal
// extensibility of 1, B has a horizontal extensibility of 2. If A
// and B are horizontally concatenated, A gets 1/3 of the remaining
// space and B gets 2/3 of the remaining space.
#include "BoxPoint.h"
#include "misc.h" // min(), max()
class BoxExtend: public BoxPoint {
public:
// Constructors
BoxExtend(BoxCoordinate x_extend, BoxCoordinate y_extend):
BoxPoint(x_extend, y_extend)
{}
BoxExtend(BoxCoordinate c):
BoxPoint(c)
{}
BoxExtend():
BoxPoint()
{}
BoxExtend(const BoxPoint& p):
BoxPoint(p)
{}
// Horizontal concatenation
BoxExtend operator & (const BoxExtend& e)
{
if (isValid() && e.isValid())
return BoxExtend(point[X] + e.point[X],
min(point[Y],e.point[Y]));
else
return BoxExtend();
}
// Vertical concatenation
BoxExtend operator | (const BoxExtend& e)
{
if (isValid() && e.isValid())
return BoxExtend(min(point[X], e.point[X]),
point[Y] + e.point[Y]);
else
return BoxExtend();
}
// Stacked concatenation
BoxExtend operator ^ (const BoxExtend& e)
{
if (isValid() && e.isValid())
return BoxExtend(max(point[X], e.point[X]),
max(point[Y], e.point[Y]));
else
return BoxExtend();
}
// Assignment versions
void operator &= (const BoxExtend& e)
{
if (isValid() && e.isValid())
{
point[X] += e.point[X];
point[Y] = min(point[Y], e.point[Y]);
}
}
void operator |= (const BoxExtend& e)
{
if (isValid() && e.isValid())
{
point[X] = min(point[X], e.point[X]);
point[Y] += e.point[Y];
}
}
void operator ^= (const BoxExtend& e)
{
if (isValid() && e.isValid())
{
point[X] = max(point[X], e.point[X]);
point[Y] = max(point[Y], e.point[Y]);
}
}
// Set extensibility to zero
void fix (BoxDimension dimension)
{
if (isValid())
point[dimension] = 0;
}
};
// I/O
inline ostream& operator << (ostream& stream, const BoxExtend& extend)
{
const BoxPoint& p = extend;
return operator << (stream, p);
}
#endif // _DDD_BoxExtend_h
// DON'T ADD ANYTHING BEHIND THIS #endif