window(1): Remove __RCSID & friends.
[dragonfly.git] / usr.bin / window / wwdelchar.c
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2c872e05 1/* @(#)wwdelchar.c 8.1 (Berkeley) 6/6/93 */
abecab39
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2/* $NetBSD: wwdelchar.c,v 1.7 2003/08/07 11:17:38 agc Exp $ */
3
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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.
abecab39 19 * 3. Neither the name of the University nor the names of its contributors
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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
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36#include "ww.h"
37#include "tt.h"
abecab39 38#include "xx.h"
984263bc 39
abecab39
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40void
41wwdelchar(struct ww *w, int row, int col)
984263bc 42{
abecab39 43 int i;
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44 int nvis;
45
46 /*
47 * First, shift the line.
48 */
49 {
abecab39 50 union ww_char *p, *q;
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51
52 p = &w->ww_buf[row][col];
53 q = p + 1;
54 for (i = w->ww_b.r - col; --i > 0;)
55 *p++ = *q++;
56 p->c_w = ' ';
57 }
58
59 /*
60 * If can't see it, just return.
61 */
62 if (row < w->ww_i.t || row >= w->ww_i.b
63 || w->ww_i.r <= 0 || w->ww_i.r <= col)
64 return;
65
66 if (col < w->ww_i.l)
67 col = w->ww_i.l;
68
69 /*
70 * Now find out how much is actually changed, and fix wwns.
71 */
72 {
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73 union ww_char *buf;
74 char *win;
75 union ww_char *ns;
76 unsigned char *smap;
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77 char touched;
78
79 nvis = 0;
80 smap = &wwsmap[row][col];
81 for (i = col; i < w->ww_i.r && *smap++ != w->ww_index; i++)
82 ;
83 if (i >= w->ww_i.r)
84 return;
85 col = i;
86 buf = w->ww_buf[row];
87 win = w->ww_win[row];
88 ns = wwns[row];
89 smap = &wwsmap[row][i];
90 touched = wwtouched[row];
91 for (; i < w->ww_i.r; i++) {
92 if (*smap++ != w->ww_index)
93 continue;
94 touched |= WWU_TOUCHED;
95 if (win[i])
96 ns[i].c_w =
97 buf[i].c_w ^ win[i] << WWC_MSHIFT;
98 else {
99 nvis++;
100 ns[i] = buf[i];
101 }
102 }
103 wwtouched[row] = touched;
104 }
105
106 /*
107 * Can/Should we use delete character?
108 */
109 if (tt.tt_delchar != 0 && nvis > (wwncol - col) / 2) {
abecab39 110 union ww_char *p, *q;
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111
112 xxdelchar(row, col);
113 p = &wwos[row][col];
114 q = p + 1;
115 for (i = wwncol - col; --i > 0;)
116 *p++ = *q++;
117 p->c_w = ' ';
118 }
119}