Annotation of src/usr.bin/window/wwinschar.c, Revision 1.6
1.6 ! millert 1: /* $OpenBSD: wwinschar.c,v 1.5 2001/11/19 19:02:18 mpech Exp $ */
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.
1.6 ! millert 19: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 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: #ifndef lint
37: #if 0
38: static char sccsid[] = "@(#)wwinschar.c 8.1 (Berkeley) 6/6/93";
39: #else
1.6 ! millert 40: static char rcsid[] = "$OpenBSD: wwinschar.c,v 1.5 2001/11/19 19:02:18 mpech Exp $";
1.1 deraadt 41: #endif
42: #endif /* not lint */
43:
44: #include "ww.h"
45: #include "tt.h"
46:
47: wwinschar(w, row, col, c, m)
1.5 mpech 48: struct ww *w;
1.1 deraadt 49: char c, m;
50: {
1.5 mpech 51: int i;
1.1 deraadt 52: int nvis;
53: short x = c | m << WWC_MSHIFT;
54:
55: /*
56: * First, shift the line.
57: */
58: {
1.5 mpech 59: union ww_char *p, *q;
1.1 deraadt 60:
61: p = &w->ww_buf[row][w->ww_b.r];
62: q = p - 1;
63: for (i = w->ww_b.r - col; --i > 0;)
64: *--p = *--q;
65: q->c_w = x;
66: }
67:
68: /*
69: * If can't see it, just return.
70: */
71: if (row < w->ww_i.t || row >= w->ww_i.b
72: || w->ww_i.r <= 0 || w->ww_i.r <= col)
73: return;
74:
75: if (col < w->ww_i.l)
76: col = w->ww_i.l;
77:
78: /*
79: * Now find out how much is actually changed, and fix wwns.
80: */
81: {
1.5 mpech 82: union ww_char *buf;
83: char *win;
84: union ww_char *ns;
85: unsigned char *smap;
1.1 deraadt 86: char touched;
87:
88: nvis = 0;
89: smap = &wwsmap[row][col];
90: for (i = col; i < w->ww_i.r && *smap++ != w->ww_index; i++)
91: ;
92: if (i >= w->ww_i.r)
93: return;
94: col = i;
95: buf = w->ww_buf[row];
96: win = w->ww_win[row];
97: ns = wwns[row];
98: smap = &wwsmap[row][i];
99: touched = wwtouched[row];
100: for (; i < w->ww_i.r; i++) {
101: if (*smap++ != w->ww_index)
102: continue;
103: touched |= WWU_TOUCHED;
104: if (win[i])
105: ns[i].c_w =
106: buf[i].c_w ^ win[i] << WWC_MSHIFT;
107: else {
108: nvis++;
109: ns[i] = buf[i];
110: }
111: }
112: wwtouched[row] = touched;
113: }
114:
115: /*
116: * Can/Should we use delete character?
117: */
118: if ((tt.tt_inschar || tt.tt_insspace) && nvis > (wwncol - col) / 2) {
1.5 mpech 119: union ww_char *p, *q;
1.1 deraadt 120:
121: if (tt.tt_inschar)
122: xxinschar(row, col, c, m);
123: else {
124: xxinsspace(row, col);
125: x = ' ';
126: }
127: p = &wwos[row][wwncol];
128: q = p - 1;
129: for (i = wwncol - col; --i > 0;)
130: *--p = *--q;
131: q->c_w = x;
132: }
133: }