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60de5df9 | 1 | /* |
46e9ea25 KB |
2 | * Copyright (c) 1983 Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
3dd3a9e5 KB |
5 | * This code is derived from software contributed to Berkeley by |
6 | * Edward Wang at The University of California, Berkeley. | |
7 | * | |
87f529ec | 8 | * %sccs.include.redist.c% |
60de5df9 EW |
9 | */ |
10 | ||
46e9ea25 | 11 | #ifndef lint |
3dd3a9e5 | 12 | static char sccsid[] = "@(#)wwinschar.c 3.20 (Berkeley) %G%"; |
46e9ea25 KB |
13 | #endif /* not lint */ |
14 | ||
bc28423e | 15 | #include "ww.h" |
e908bfac | 16 | #include "tt.h" |
bc28423e | 17 | |
365131ac | 18 | wwinschar(w, row, col, c, m) |
bc28423e | 19 | register struct ww *w; |
365131ac | 20 | char c, m; |
bc28423e | 21 | { |
14f251df | 22 | register i; |
14f251df | 23 | int nvis; |
365131ac | 24 | short x = c | m << WWC_MSHIFT; |
bc28423e | 25 | |
19f9784c EW |
26 | /* |
27 | * First, shift the line. | |
28 | */ | |
14f251df EW |
29 | { |
30 | register union ww_char *p, *q; | |
31 | ||
f2a77fe1 | 32 | p = &w->ww_buf[row][w->ww_b.r]; |
14f251df | 33 | q = p - 1; |
f2a77fe1 | 34 | for (i = w->ww_b.r - col; --i > 0;) |
14f251df | 35 | *--p = *--q; |
365131ac | 36 | q->c_w = x; |
14f251df | 37 | } |
19f9784c EW |
38 | |
39 | /* | |
40 | * If can't see it, just return. | |
41 | */ | |
f2a77fe1 EW |
42 | if (row < w->ww_i.t || row >= w->ww_i.b |
43 | || w->ww_i.r <= 0 || w->ww_i.r <= col) | |
14f251df | 44 | return; |
19f9784c | 45 | |
f2a77fe1 EW |
46 | if (col < w->ww_i.l) |
47 | col = w->ww_i.l; | |
19f9784c EW |
48 | |
49 | /* | |
50 | * Now find out how much is actually changed, and fix wwns. | |
51 | */ | |
14f251df EW |
52 | { |
53 | register union ww_char *buf; | |
54 | register char *win; | |
55 | register union ww_char *ns; | |
56 | register char *smap; | |
d069a508 | 57 | char touched; |
14f251df EW |
58 | |
59 | nvis = 0; | |
f2a77fe1 | 60 | smap = &wwsmap[row][col]; |
d069a508 EW |
61 | for (i = col; i < w->ww_i.r && *smap++ != w->ww_index; i++) |
62 | ; | |
63 | if (i >= w->ww_i.r) | |
14f251df | 64 | return; |
d069a508 EW |
65 | col = i; |
66 | buf = w->ww_buf[row]; | |
67 | win = w->ww_win[row]; | |
68 | ns = wwns[row]; | |
69 | smap = &wwsmap[row][i]; | |
70 | touched = wwtouched[row]; | |
71 | for (; i < w->ww_i.r; i++) { | |
72 | if (*smap++ != w->ww_index) | |
73 | continue; | |
04d70db4 | 74 | touched |= WWU_TOUCHED; |
d069a508 EW |
75 | if (win[i]) |
76 | ns[i].c_w = | |
77 | buf[i].c_w ^ win[i] << WWC_MSHIFT; | |
78 | else { | |
14f251df | 79 | nvis++; |
d069a508 | 80 | ns[i] = buf[i]; |
bc28423e | 81 | } |
d069a508 EW |
82 | } |
83 | wwtouched[row] = touched; | |
bc28423e | 84 | } |
19f9784c EW |
85 | |
86 | /* | |
87 | * Can/Should we use delete character? | |
88 | */ | |
365131ac | 89 | if ((tt.tt_inschar || tt.tt_insspace) && nvis > (wwncol - col) / 2) { |
14f251df EW |
90 | register union ww_char *p, *q; |
91 | ||
365131ac EW |
92 | if (tt.tt_inschar) |
93 | xxinschar(row, col, c, m); | |
94 | else { | |
95 | xxinsspace(row, col); | |
96 | x = ' '; | |
97 | } | |
f2a77fe1 | 98 | p = &wwos[row][wwncol]; |
14f251df | 99 | q = p - 1; |
f2a77fe1 | 100 | for (i = wwncol - col; --i > 0;) |
14f251df | 101 | *--p = *--q; |
365131ac | 102 | q->c_w = x; |
14f251df | 103 | } |
bc28423e | 104 | } |