NetBSD/usr.bin/window/wwdelete.c

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/* $NetBSD: wwdelete.c,v 1.7 2003/08/07 11:17:38 agc Exp $ */
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/*
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* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
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*
* 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. Neither the name of the University nor the names of its contributors
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* 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.
*/
#include <sys/cdefs.h>
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#ifndef lint
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#if 0
static char sccsid[] = "@(#)wwdelete.c 8.1 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: wwdelete.c,v 1.7 2003/08/07 11:17:38 agc Exp $");
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#endif
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#endif /* not lint */
#include "ww.h"
/*
* Pull w free from the cover list.
*/
void
wwdelete(struct ww *w)
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{
int i;
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for (i = w->ww_i.t; i < w->ww_i.b; i++) {
int j;
unsigned char *smap = wwsmap[i];
union ww_char *ns = wwns[i];
int nchanged = 0;
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for (j = w->ww_i.l; j < w->ww_i.r; j++)
if (smap[j] == w->ww_index) {
smap[j] = WWX_NOBODY;
ns[j].c_w = ' ';
nchanged++;
}
if (nchanged > 0)
wwtouched[i] |= WWU_TOUCHED;
}
{
struct ww *wp;
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for (wp = w->ww_forw; wp != &wwhead; wp = wp->ww_forw)
wp->ww_order--;
}
if (w->ww_forw != &wwhead)
wwdelete1(w->ww_forw,
w->ww_i.t, w->ww_i.b, w->ww_i.l, w->ww_i.r);
w->ww_back->ww_forw = w->ww_forw;
w->ww_forw->ww_back = w->ww_back;
w->ww_forw = w->ww_back = 0;
}
void
wwdelete1(struct ww *w, int t, int b, int l, int r)
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{
int i;
int tt, bb, ll, rr;
char hasglass;
again:
hasglass = 0;
tt = MAX(t, w->ww_i.t);
bb = MIN(b, w->ww_i.b);
ll = MAX(l, w->ww_i.l);
rr = MIN(r, w->ww_i.r);
if (tt >= bb || ll >= rr) {
if ((w = w->ww_forw) == &wwhead)
return;
goto again;
}
for (i = tt; i < bb; i++) {
int j;
unsigned char *smap = wwsmap[i];
union ww_char *ns = wwns[i];
char *win = w->ww_win[i];
union ww_char *buf = w->ww_buf[i];
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int nvis = w->ww_nvis[i];
int nchanged = 0;
for (j = ll; j < rr; j++) {
if (smap[j] != WWX_NOBODY)
continue;
if (win[j] & WWM_GLS) {
hasglass = 1;
continue;
}
smap[j] = w->ww_index;
ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT;
nchanged++;
if (win[j] == 0)
nvis++;
}
if (nchanged > 0)
wwtouched[i] |= WWU_TOUCHED;
w->ww_nvis[i] = nvis;
}
if ((w = w->ww_forw) == &wwhead)
return;
if (hasglass)
goto again;
if (tt > t)
wwdelete1(w, t, tt, l, r);
if (bb < b)
wwdelete1(w, bb, b, l, r);
if (ll > l)
wwdelete1(w, tt, bb, l, ll);
if (rr < r)
wwdelete1(w, tt, bb, rr, r);
}