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/* $OpenBSD: _mvcur.c,v 1.1 1996/10/12 03:08:25 tholo Exp $ */
/*
* Copyright (c) 1996 SigmaSoft, Th. Lockert <tholo@sigmasoft.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by SigmaSoft, Th. Lockert.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef lint
static char rcsid[] = "$OpenBSD: _mvcur.c,v 1.1 1996/10/12 03:08:25 tholo Exp $";
#endif
#include <string.h>
#include <unistd.h>
#include <termios.h>
#include "term.h"
static int
rawmode()
{
struct termios ti;
if (tcgetattr(STDIN_FILENO, &ti) < 0)
return 1;
if (ti.c_oflag & OPOST)
if (ti.c_oflag & ONLCR)
return 0;
return 1;
}
/*
* Optimized cursor movement, assume cursor is currently
* located at (oldx,oldy), output what is needed for the
* cursor to be relocated to (newx,newy)
*/
int
_mvcur(oldy, oldx, newy, newx)
int oldy;
int oldx;
int newy;
int newx;
{
int l, c, raw;
char *p;
if (newx >= columns) {
newy += newx / columns;
newx %= columns;
}
if (oldx >= columns) {
l = (oldx + 1) / columns;
oldy += l;
oldx %= columns;
if (!auto_right_margin) {
raw = rawmode();
while (l > 0) {
if (raw)
if (carriage_return != NULL)
tputs(carriage_return, 0, _ti_outc);
else
_ti_outc('\r');
if (linefeed_if_not_lf != NULL)
tputs(linefeed_if_not_lf, 0, _ti_outc);
else
_ti_outc('\n');
l--;
}
oldx = 0;
}
if (oldy >= lines - 1) {
newy -= oldy - (lines - 1);
oldy = lines - 1;
}
}
if (newy >= lines) {
l = newy;
newy = lines - 1;
if (oldy < lines - 1) {
c = newx;
if (cursor_address == NULL)
newx = 0;
mvcur(oldy, oldx, newy, newx);
newx = c;
}
while (l >= lines) {
if (linefeed_if_not_lf != NULL)
tputs(linefeed_if_not_lf, 0, _ti_outc);
else
_ti_outc('\n');
l--;
oldx = 0;
}
}
if (newy < oldy && !(cursor_address != NULL || cursor_up != NULL))
newy = oldy;
if (cursor_address != NULL) {
p = tparm(cursor_address, newx, newy);
tputs(p, 0, _ti_outc);
}
else
return ERR;
return OK;
}
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