Annotation of src/usr.bin/window/wwdelete.c, Revision 1.2
1.2 ! niklas 1: /* $NetBSD: wwdelete.c,v 1.4 1996/02/08 21:49:01 mycroft Exp $ */
1.1 deraadt 2:
3: /*
4: * Copyright (c) 1983, 1993
5: * The Regents of the University of California. All rights reserved.
6: *
7: * This code is derived from software contributed to Berkeley by
8: * Edward Wang at The University of California, Berkeley.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: * 3. All advertising materials mentioning features or use of this software
19: * must display the following acknowledgement:
20: * This product includes software developed by the University of
21: * California, Berkeley and its contributors.
22: * 4. Neither the name of the University nor the names of its contributors
23: * may be used to endorse or promote products derived from this software
24: * without specific prior written permission.
25: *
26: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36: * SUCH DAMAGE.
37: */
38:
39: #ifndef lint
40: #if 0
41: static char sccsid[] = "@(#)wwdelete.c 8.1 (Berkeley) 6/6/93";
42: #else
1.2 ! niklas 43: static char rcsid[] = "$NetBSD: wwdelete.c,v 1.4 1996/02/08 21:49:01 mycroft Exp $";
1.1 deraadt 44: #endif
45: #endif /* not lint */
46:
47: #include "ww.h"
48:
49: /*
50: * Pull w free from the cover list.
51: */
52: wwdelete(w)
53: register struct ww *w;
54: {
55: register i;
56:
57: for (i = w->ww_i.t; i < w->ww_i.b; i++) {
58: register j;
1.2 ! niklas 59: register unsigned char *smap = wwsmap[i];
1.1 deraadt 60: register union ww_char *ns = wwns[i];
61: register int nchanged = 0;
62:
63: for (j = w->ww_i.l; j < w->ww_i.r; j++)
64: if (smap[j] == w->ww_index) {
65: smap[j] = WWX_NOBODY;
66: ns[j].c_w = ' ';
67: nchanged++;
68: }
69: if (nchanged > 0)
70: wwtouched[i] |= WWU_TOUCHED;
71: }
72:
73: {
74: register struct ww *wp;
75:
76: for (wp = w->ww_forw; wp != &wwhead; wp = wp->ww_forw)
77: wp->ww_order--;
78: }
79:
80: if (w->ww_forw != &wwhead)
81: wwdelete1(w->ww_forw,
82: w->ww_i.t, w->ww_i.b, w->ww_i.l, w->ww_i.r);
83:
84: w->ww_back->ww_forw = w->ww_forw;
85: w->ww_forw->ww_back = w->ww_back;
86: w->ww_forw = w->ww_back = 0;
87: }
88:
89: wwdelete1(w, t, b, l, r)
90: register struct ww *w;
91: {
92: int i;
93: int tt, bb, ll, rr;
94: char hasglass;
95:
96: again:
97: hasglass = 0;
98: tt = MAX(t, w->ww_i.t);
99: bb = MIN(b, w->ww_i.b);
100: ll = MAX(l, w->ww_i.l);
101: rr = MIN(r, w->ww_i.r);
102: if (tt >= bb || ll >= rr) {
103: if ((w = w->ww_forw) == &wwhead)
104: return;
105: goto again;
106: }
107: for (i = tt; i < bb; i++) {
108: register j;
1.2 ! niklas 109: register unsigned char *smap = wwsmap[i];
1.1 deraadt 110: register union ww_char *ns = wwns[i];
111: register char *win = w->ww_win[i];
112: register union ww_char *buf = w->ww_buf[i];
113: int nvis = w->ww_nvis[i];
114: int nchanged = 0;
115:
116: for (j = ll; j < rr; j++) {
117: if (smap[j] != WWX_NOBODY)
118: continue;
119: if (win[j] & WWM_GLS) {
120: hasglass = 1;
121: continue;
122: }
123: smap[j] = w->ww_index;
124: ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT;
125: nchanged++;
126: if (win[j] == 0)
127: nvis++;
128: }
129: if (nchanged > 0)
130: wwtouched[i] |= WWU_TOUCHED;
131: w->ww_nvis[i] = nvis;
132: }
133: if ((w = w->ww_forw) == &wwhead)
134: return;
135: if (hasglass)
136: goto again;
137: if (tt > t)
138: wwdelete1(w, t, tt, l, r);
139: if (bb < b)
140: wwdelete1(w, bb, b, l, r);
141: if (ll > l)
142: wwdelete1(w, tt, bb, l, ll);
143: if (rr < r)
144: wwdelete1(w, tt, bb, rr, r);
145: }
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