1 /* @(#)wwdelete.c 8.1 (Berkeley) 6/6/93 */
2 /* $NetBSD: wwdelete.c,v 1.7 2003/08/07 11:17:38 agc Exp $ */
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. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #include "ww.h"
37
38 /*
39 * Pull w free from the cover list.
40 */
41 void
wwdelete(struct ww * w)42 wwdelete(struct ww *w)
43 {
44 int i;
45
46 for (i = w->ww_i.t; i < w->ww_i.b; i++) {
47 int j;
48 unsigned char *smap = wwsmap[i];
49 union ww_char *ns = wwns[i];
50 int nchanged = 0;
51
52 for (j = w->ww_i.l; j < w->ww_i.r; j++)
53 if (smap[j] == w->ww_index) {
54 smap[j] = WWX_NOBODY;
55 ns[j].c_w = ' ';
56 nchanged++;
57 }
58 if (nchanged > 0)
59 wwtouched[i] |= WWU_TOUCHED;
60 }
61
62 {
63 struct ww *wp;
64
65 for (wp = w->ww_forw; wp != &wwhead; wp = wp->ww_forw)
66 wp->ww_order--;
67 }
68
69 if (w->ww_forw != &wwhead)
70 wwdelete1(w->ww_forw,
71 w->ww_i.t, w->ww_i.b, w->ww_i.l, w->ww_i.r);
72
73 w->ww_back->ww_forw = w->ww_forw;
74 w->ww_forw->ww_back = w->ww_back;
75 w->ww_forw = w->ww_back = 0;
76 }
77
78 void
wwdelete1(struct ww * w,int t,int b,int l,int r)79 wwdelete1(struct ww *w, int t, int b, int l, int r)
80 {
81 int i;
82 int tt, bb, ll, rr;
83 char hasglass;
84
85 again:
86 hasglass = 0;
87 tt = MAX(t, w->ww_i.t);
88 bb = MIN(b, w->ww_i.b);
89 ll = MAX(l, w->ww_i.l);
90 rr = MIN(r, w->ww_i.r);
91 if (tt >= bb || ll >= rr) {
92 if ((w = w->ww_forw) == &wwhead)
93 return;
94 goto again;
95 }
96 for (i = tt; i < bb; i++) {
97 int j;
98 unsigned char *smap = wwsmap[i];
99 union ww_char *ns = wwns[i];
100 char *win = w->ww_win[i];
101 union ww_char *buf = w->ww_buf[i];
102 int nvis = w->ww_nvis[i];
103 int nchanged = 0;
104
105 for (j = ll; j < rr; j++) {
106 if (smap[j] != WWX_NOBODY)
107 continue;
108 if (win[j] & WWM_GLS) {
109 hasglass = 1;
110 continue;
111 }
112 smap[j] = w->ww_index;
113 ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT;
114 nchanged++;
115 if (win[j] == 0)
116 nvis++;
117 }
118 if (nchanged > 0)
119 wwtouched[i] |= WWU_TOUCHED;
120 w->ww_nvis[i] = nvis;
121 }
122 if ((w = w->ww_forw) == &wwhead)
123 return;
124 if (hasglass)
125 goto again;
126 if (tt > t)
127 wwdelete1(w, t, tt, l, r);
128 if (bb < b)
129 wwdelete1(w, bb, b, l, r);
130 if (ll > l)
131 wwdelete1(w, tt, bb, l, ll);
132 if (rr < r)
133 wwdelete1(w, tt, bb, rr, r);
134 }
135