Annotation of src/usr.bin/window/wwdelete.c, Revision 1.4
1.4 ! downsj 1: /* $OpenBSD$ */
1.2 niklas 2: /* $NetBSD: wwdelete.c,v 1.4 1996/02/08 21:49:01 mycroft Exp $ */
1.1 deraadt 3:
4: /*
5: * Copyright (c) 1983, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * This code is derived from software contributed to Berkeley by
9: * Edward Wang at The University of California, Berkeley.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: * 3. All advertising materials mentioning features or use of this software
20: * must display the following acknowledgement:
21: * This product includes software developed by the University of
22: * California, Berkeley and its contributors.
23: * 4. Neither the name of the University nor the names of its contributors
24: * may be used to endorse or promote products derived from this software
25: * without specific prior written permission.
26: *
27: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37: * SUCH DAMAGE.
38: */
39:
40: #ifndef lint
41: #if 0
42: static char sccsid[] = "@(#)wwdelete.c 8.1 (Berkeley) 6/6/93";
43: #else
1.4 ! downsj 44: static char rcsid[] = "$OpenBSD$";
1.1 deraadt 45: #endif
46: #endif /* not lint */
47:
48: #include "ww.h"
49:
50: /*
51: * Pull w free from the cover list.
52: */
53: wwdelete(w)
54: register struct ww *w;
55: {
56: register i;
57:
58: for (i = w->ww_i.t; i < w->ww_i.b; i++) {
59: register j;
1.2 niklas 60: register unsigned char *smap = wwsmap[i];
1.1 deraadt 61: register union ww_char *ns = wwns[i];
62: register int nchanged = 0;
63:
64: for (j = w->ww_i.l; j < w->ww_i.r; j++)
65: if (smap[j] == w->ww_index) {
66: smap[j] = WWX_NOBODY;
67: ns[j].c_w = ' ';
68: nchanged++;
69: }
70: if (nchanged > 0)
71: wwtouched[i] |= WWU_TOUCHED;
72: }
73:
74: {
75: register struct ww *wp;
76:
77: for (wp = w->ww_forw; wp != &wwhead; wp = wp->ww_forw)
78: wp->ww_order--;
79: }
80:
81: if (w->ww_forw != &wwhead)
82: wwdelete1(w->ww_forw,
83: w->ww_i.t, w->ww_i.b, w->ww_i.l, w->ww_i.r);
84:
85: w->ww_back->ww_forw = w->ww_forw;
86: w->ww_forw->ww_back = w->ww_back;
87: w->ww_forw = w->ww_back = 0;
88: }
89:
90: wwdelete1(w, t, b, l, r)
91: register struct ww *w;
92: {
93: int i;
94: int tt, bb, ll, rr;
95: char hasglass;
96:
97: again:
98: hasglass = 0;
99: tt = MAX(t, w->ww_i.t);
100: bb = MIN(b, w->ww_i.b);
101: ll = MAX(l, w->ww_i.l);
102: rr = MIN(r, w->ww_i.r);
103: if (tt >= bb || ll >= rr) {
104: if ((w = w->ww_forw) == &wwhead)
105: return;
106: goto again;
107: }
108: for (i = tt; i < bb; i++) {
109: register j;
1.2 niklas 110: register unsigned char *smap = wwsmap[i];
1.1 deraadt 111: register union ww_char *ns = wwns[i];
112: register char *win = w->ww_win[i];
113: register union ww_char *buf = w->ww_buf[i];
114: int nvis = w->ww_nvis[i];
115: int nchanged = 0;
116:
117: for (j = ll; j < rr; j++) {
118: if (smap[j] != WWX_NOBODY)
119: continue;
120: if (win[j] & WWM_GLS) {
121: hasglass = 1;
122: continue;
123: }
124: smap[j] = w->ww_index;
125: ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT;
126: nchanged++;
127: if (win[j] == 0)
128: nvis++;
129: }
130: if (nchanged > 0)
131: wwtouched[i] |= WWU_TOUCHED;
132: w->ww_nvis[i] = nvis;
133: }
134: if ((w = w->ww_forw) == &wwhead)
135: return;
136: if (hasglass)
137: goto again;
138: if (tt > t)
139: wwdelete1(w, t, tt, l, r);
140: if (bb < b)
141: wwdelete1(w, bb, b, l, r);
142: if (ll > l)
143: wwdelete1(w, tt, bb, l, ll);
144: if (rr < r)
145: wwdelete1(w, tt, bb, rr, r);
146: }
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