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60de5df9 | 1 | /* |
46e9ea25 KB |
2 | * Copyright (c) 1983 Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
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5 | * This code is derived from software contributed to Berkeley by |
6 | * Edward Wang at The University of California, Berkeley. | |
7 | * | |
af359dea C |
8 | * Redistribution and use in source and binary forms, with or without |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * 1. Redistributions of source code must retain the above copyright | |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. All advertising materials mentioning features or use of this software | |
17 | * must display the following acknowledgement: | |
18 | * This product includes software developed by the University of | |
19 | * California, Berkeley and its contributors. | |
20 | * 4. Neither the name of the University nor the names of its contributors | |
21 | * may be used to endorse or promote products derived from this software | |
22 | * without specific prior written permission. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
34 | * SUCH DAMAGE. | |
60de5df9 EW |
35 | */ |
36 | ||
46e9ea25 | 37 | #ifndef lint |
1c15e888 | 38 | static char sccsid[] = "@(#)wwinschar.c 3.20 (Berkeley) 6/6/90"; |
46e9ea25 KB |
39 | #endif /* not lint */ |
40 | ||
bc28423e | 41 | #include "ww.h" |
e908bfac | 42 | #include "tt.h" |
bc28423e | 43 | |
365131ac | 44 | wwinschar(w, row, col, c, m) |
bc28423e | 45 | register struct ww *w; |
365131ac | 46 | char c, m; |
bc28423e | 47 | { |
14f251df | 48 | register i; |
14f251df | 49 | int nvis; |
365131ac | 50 | short x = c | m << WWC_MSHIFT; |
bc28423e | 51 | |
19f9784c EW |
52 | /* |
53 | * First, shift the line. | |
54 | */ | |
14f251df EW |
55 | { |
56 | register union ww_char *p, *q; | |
57 | ||
f2a77fe1 | 58 | p = &w->ww_buf[row][w->ww_b.r]; |
14f251df | 59 | q = p - 1; |
f2a77fe1 | 60 | for (i = w->ww_b.r - col; --i > 0;) |
14f251df | 61 | *--p = *--q; |
365131ac | 62 | q->c_w = x; |
14f251df | 63 | } |
19f9784c EW |
64 | |
65 | /* | |
66 | * If can't see it, just return. | |
67 | */ | |
f2a77fe1 EW |
68 | if (row < w->ww_i.t || row >= w->ww_i.b |
69 | || w->ww_i.r <= 0 || w->ww_i.r <= col) | |
14f251df | 70 | return; |
19f9784c | 71 | |
f2a77fe1 EW |
72 | if (col < w->ww_i.l) |
73 | col = w->ww_i.l; | |
19f9784c EW |
74 | |
75 | /* | |
76 | * Now find out how much is actually changed, and fix wwns. | |
77 | */ | |
14f251df EW |
78 | { |
79 | register union ww_char *buf; | |
80 | register char *win; | |
81 | register union ww_char *ns; | |
82 | register char *smap; | |
d069a508 | 83 | char touched; |
14f251df EW |
84 | |
85 | nvis = 0; | |
f2a77fe1 | 86 | smap = &wwsmap[row][col]; |
d069a508 EW |
87 | for (i = col; i < w->ww_i.r && *smap++ != w->ww_index; i++) |
88 | ; | |
89 | if (i >= w->ww_i.r) | |
14f251df | 90 | return; |
d069a508 EW |
91 | col = i; |
92 | buf = w->ww_buf[row]; | |
93 | win = w->ww_win[row]; | |
94 | ns = wwns[row]; | |
95 | smap = &wwsmap[row][i]; | |
96 | touched = wwtouched[row]; | |
97 | for (; i < w->ww_i.r; i++) { | |
98 | if (*smap++ != w->ww_index) | |
99 | continue; | |
04d70db4 | 100 | touched |= WWU_TOUCHED; |
d069a508 EW |
101 | if (win[i]) |
102 | ns[i].c_w = | |
103 | buf[i].c_w ^ win[i] << WWC_MSHIFT; | |
104 | else { | |
14f251df | 105 | nvis++; |
d069a508 | 106 | ns[i] = buf[i]; |
bc28423e | 107 | } |
d069a508 EW |
108 | } |
109 | wwtouched[row] = touched; | |
bc28423e | 110 | } |
19f9784c EW |
111 | |
112 | /* | |
113 | * Can/Should we use delete character? | |
114 | */ | |
365131ac | 115 | if ((tt.tt_inschar || tt.tt_insspace) && nvis > (wwncol - col) / 2) { |
14f251df EW |
116 | register union ww_char *p, *q; |
117 | ||
365131ac EW |
118 | if (tt.tt_inschar) |
119 | xxinschar(row, col, c, m); | |
120 | else { | |
121 | xxinsspace(row, col); | |
122 | x = ' '; | |
123 | } | |
f2a77fe1 | 124 | p = &wwos[row][wwncol]; |
14f251df | 125 | q = p - 1; |
f2a77fe1 | 126 | for (i = wwncol - col; --i > 0;) |
14f251df | 127 | *--p = *--q; |
365131ac | 128 | q->c_w = x; |
14f251df | 129 | } |
bc28423e | 130 | } |