Annotation of src/usr.bin/window/wwinschar.c, Revision 1.4
1.4 ! downsj 1: /* $OpenBSD$ */
1.2 niklas 2: /* $NetBSD: wwinschar.c,v 1.4 1996/02/08 21:49:09 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[] = "@(#)wwinschar.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: #include "tt.h"
50:
51: wwinschar(w, row, col, c, m)
52: register struct ww *w;
53: char c, m;
54: {
55: register i;
56: int nvis;
57: short x = c | m << WWC_MSHIFT;
58:
59: /*
60: * First, shift the line.
61: */
62: {
63: register union ww_char *p, *q;
64:
65: p = &w->ww_buf[row][w->ww_b.r];
66: q = p - 1;
67: for (i = w->ww_b.r - col; --i > 0;)
68: *--p = *--q;
69: q->c_w = x;
70: }
71:
72: /*
73: * If can't see it, just return.
74: */
75: if (row < w->ww_i.t || row >= w->ww_i.b
76: || w->ww_i.r <= 0 || w->ww_i.r <= col)
77: return;
78:
79: if (col < w->ww_i.l)
80: col = w->ww_i.l;
81:
82: /*
83: * Now find out how much is actually changed, and fix wwns.
84: */
85: {
86: register union ww_char *buf;
87: register char *win;
88: register union ww_char *ns;
1.2 niklas 89: register unsigned char *smap;
1.1 deraadt 90: char touched;
91:
92: nvis = 0;
93: smap = &wwsmap[row][col];
94: for (i = col; i < w->ww_i.r && *smap++ != w->ww_index; i++)
95: ;
96: if (i >= w->ww_i.r)
97: return;
98: col = i;
99: buf = w->ww_buf[row];
100: win = w->ww_win[row];
101: ns = wwns[row];
102: smap = &wwsmap[row][i];
103: touched = wwtouched[row];
104: for (; i < w->ww_i.r; i++) {
105: if (*smap++ != w->ww_index)
106: continue;
107: touched |= WWU_TOUCHED;
108: if (win[i])
109: ns[i].c_w =
110: buf[i].c_w ^ win[i] << WWC_MSHIFT;
111: else {
112: nvis++;
113: ns[i] = buf[i];
114: }
115: }
116: wwtouched[row] = touched;
117: }
118:
119: /*
120: * Can/Should we use delete character?
121: */
122: if ((tt.tt_inschar || tt.tt_insspace) && nvis > (wwncol - col) / 2) {
123: register union ww_char *p, *q;
124:
125: if (tt.tt_inschar)
126: xxinschar(row, col, c, m);
127: else {
128: xxinsspace(row, col);
129: x = ' ';
130: }
131: p = &wwos[row][wwncol];
132: q = p - 1;
133: for (i = wwncol - col; --i > 0;)
134: *--p = *--q;
135: q->c_w = x;
136: }
137: }