Commit | Line | Data |
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53069d72 | 1 | #ifndef lint |
04d70db4 | 2 | static char *sccsid = "@(#)wwdelchar.c 3.9 83/12/02"; |
53069d72 EW |
3 | #endif |
4 | ||
5 | #include "ww.h" | |
e908bfac | 6 | #include "tt.h" |
53069d72 | 7 | |
f2a77fe1 | 8 | wwdelchar(w, row, col) |
53069d72 EW |
9 | register struct ww *w; |
10 | { | |
14f251df | 11 | register i; |
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12 | int nvis; |
13 | ||
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14 | /* |
15 | * First, shift the line. | |
16 | */ | |
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17 | { |
18 | register union ww_char *p, *q; | |
19 | ||
f2a77fe1 | 20 | p = &w->ww_buf[row][col]; |
14f251df | 21 | q = p + 1; |
f2a77fe1 | 22 | for (i = w->ww_b.r - col; --i > 0;) |
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23 | *p++ = *q++; |
24 | p->c_w = ' '; | |
25 | } | |
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26 | |
27 | /* | |
28 | * If can't see it, just return. | |
29 | */ | |
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30 | if (row < w->ww_i.t || row >= w->ww_i.b |
31 | || w->ww_i.r <= 0 || w->ww_i.r <= col) | |
14f251df | 32 | return; |
19f9784c | 33 | |
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34 | if (col < w->ww_i.l) |
35 | col = w->ww_i.l; | |
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36 | |
37 | /* | |
38 | * Now find out how much is actually changed, and fix wwns. | |
39 | */ | |
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40 | { |
41 | register union ww_char *buf; | |
42 | register char *win; | |
43 | register union ww_char *ns; | |
44 | register char *smap; | |
d069a508 | 45 | char touched; |
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46 | |
47 | nvis = 0; | |
f2a77fe1 | 48 | smap = &wwsmap[row][col]; |
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49 | for (i = col; i < w->ww_i.r && *smap++ != w->ww_index; i++) |
50 | ; | |
51 | if (i >= w->ww_i.r) | |
14f251df | 52 | return; |
d069a508 EW |
53 | col = i; |
54 | buf = w->ww_buf[row]; | |
55 | win = w->ww_win[row]; | |
56 | ns = wwns[row]; | |
57 | smap = &wwsmap[row][i]; | |
58 | touched = wwtouched[row]; | |
59 | for (; i < w->ww_i.r; i++) { | |
60 | if (*smap++ != w->ww_index) | |
61 | continue; | |
04d70db4 | 62 | touched |= WWU_TOUCHED; |
d069a508 EW |
63 | if (win[i]) |
64 | ns[i].c_w = | |
65 | buf[i].c_w ^ win[i] << WWC_MSHIFT; | |
66 | else { | |
14f251df | 67 | nvis++; |
d069a508 | 68 | ns[i] = buf[i]; |
14f251df | 69 | } |
d069a508 EW |
70 | } |
71 | wwtouched[row] = touched; | |
14f251df | 72 | } |
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73 | |
74 | /* | |
75 | * Can/Should we use delete character? | |
76 | */ | |
f2a77fe1 | 77 | if (tt.tt_delchar != 0 && nvis > (wwncol - col) / 2) { |
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78 | register union ww_char *p, *q; |
79 | ||
f2a77fe1 | 80 | (*tt.tt_move)(row, col); |
14f251df EW |
81 | (*tt.tt_delchar)(); |
82 | ||
f2a77fe1 | 83 | p = &wwos[row][col]; |
14f251df | 84 | q = p + 1; |
f2a77fe1 | 85 | for (i = wwncol - col; --i > 0;) |
14f251df EW |
86 | *p++ = *q++; |
87 | p->c_w = ' '; | |
88 | } | |
53069d72 | 89 | } |