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53069d72 | 1 | #ifndef lint |
f2a77fe1 | 2 | static char *sccsid = "@(#)wwdelchar.c 3.6 83/09/15"; |
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3 | #endif |
4 | ||
5 | #include "ww.h" | |
e908bfac | 6 | #include "tt.h" |
53069d72 | 7 | |
f2a77fe1 | 8 | wwdelchar(w, row, col) |
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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; | |
861cd1ed | 45 | char *touched; |
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46 | |
47 | nvis = 0; | |
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48 | smap = &wwsmap[row][col]; |
49 | for (i = w->ww_i.r - col; i > 0 && *smap++ != w->ww_index; i--) | |
50 | col++; | |
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51 | if (i <= 0) |
52 | return; | |
f2a77fe1 | 53 | buf = &w->ww_buf[row][col]; |
14f251df | 54 | win = &w->ww_win[row][col]; |
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55 | ns = &wwns[row][col]; |
56 | touched = &wwtouched[row]; | |
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57 | for (; --i >= 0;) { |
58 | if (*win) { | |
59 | if ((*win & (WWM_COV|WWM_GLS)) != 0) { | |
60 | ns++; | |
61 | buf++; | |
861cd1ed | 62 | } else { |
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63 | ns++->c_w = buf++->c_w |
64 | ^ *win++ << WWC_MSHIFT; | |
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65 | *touched = 1; |
66 | } | |
14f251df | 67 | } else { |
861cd1ed | 68 | *touched = 1; |
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69 | *ns++ = *buf++; |
70 | win++; | |
71 | nvis++; | |
72 | } | |
73 | } | |
74 | } | |
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75 | |
76 | /* | |
77 | * Can/Should we use delete character? | |
78 | */ | |
f2a77fe1 | 79 | if (tt.tt_delchar != 0 && nvis > (wwncol - col) / 2) { |
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80 | register union ww_char *p, *q; |
81 | ||
f2a77fe1 | 82 | (*tt.tt_move)(row, col); |
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83 | (*tt.tt_delchar)(); |
84 | ||
f2a77fe1 | 85 | p = &wwos[row][col]; |
14f251df | 86 | q = p + 1; |
f2a77fe1 | 87 | for (i = wwncol - col; --i > 0;) |
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88 | *p++ = *q++; |
89 | p->c_w = ' '; | |
90 | } | |
53069d72 | 91 | } |