mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-29 12:03:03 +00:00
124 lines
3.4 KiB
C
124 lines
3.4 KiB
C
/*
|
|
* Copyright (c) 1983, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Edward Wang at The University of California, Berkeley.
|
|
*
|
|
* 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 the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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 sccsid[] = "@(#)wwdelchar.c 8.1 (Berkeley) 6/6/93";
|
|
#endif /* not lint */
|
|
|
|
#include "ww.h"
|
|
#include "tt.h"
|
|
|
|
wwdelchar(w, row, col)
|
|
register struct ww *w;
|
|
{
|
|
register i;
|
|
int nvis;
|
|
|
|
/*
|
|
* First, shift the line.
|
|
*/
|
|
{
|
|
register union ww_char *p, *q;
|
|
|
|
p = &w->ww_buf[row][col];
|
|
q = p + 1;
|
|
for (i = w->ww_b.r - col; --i > 0;)
|
|
*p++ = *q++;
|
|
p->c_w = ' ';
|
|
}
|
|
|
|
/*
|
|
* If can't see it, just return.
|
|
*/
|
|
if (row < w->ww_i.t || row >= w->ww_i.b
|
|
|| w->ww_i.r <= 0 || w->ww_i.r <= col)
|
|
return;
|
|
|
|
if (col < w->ww_i.l)
|
|
col = w->ww_i.l;
|
|
|
|
/*
|
|
* Now find out how much is actually changed, and fix wwns.
|
|
*/
|
|
{
|
|
register union ww_char *buf;
|
|
register char *win;
|
|
register union ww_char *ns;
|
|
register char *smap;
|
|
char touched;
|
|
|
|
nvis = 0;
|
|
smap = &wwsmap[row][col];
|
|
for (i = col; i < w->ww_i.r && *smap++ != w->ww_index; i++)
|
|
;
|
|
if (i >= w->ww_i.r)
|
|
return;
|
|
col = i;
|
|
buf = w->ww_buf[row];
|
|
win = w->ww_win[row];
|
|
ns = wwns[row];
|
|
smap = &wwsmap[row][i];
|
|
touched = wwtouched[row];
|
|
for (; i < w->ww_i.r; i++) {
|
|
if (*smap++ != w->ww_index)
|
|
continue;
|
|
touched |= WWU_TOUCHED;
|
|
if (win[i])
|
|
ns[i].c_w =
|
|
buf[i].c_w ^ win[i] << WWC_MSHIFT;
|
|
else {
|
|
nvis++;
|
|
ns[i] = buf[i];
|
|
}
|
|
}
|
|
wwtouched[row] = touched;
|
|
}
|
|
|
|
/*
|
|
* Can/Should we use delete character?
|
|
*/
|
|
if (tt.tt_delchar != 0 && nvis > (wwncol - col) / 2) {
|
|
register union ww_char *p, *q;
|
|
|
|
xxdelchar(row, col);
|
|
p = &wwos[row][col];
|
|
q = p + 1;
|
|
for (i = wwncol - col; --i > 0;)
|
|
*p++ = *q++;
|
|
p->c_w = ' ';
|
|
}
|
|
}
|