Commit | Line | Data |
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a43a8870 | 1 | #ifndef lint |
f2a77fe1 | 2 | static char *sccsid = "@(#)wwclreol.c 3.9 83/09/15"; |
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3 | #endif |
4 | ||
5 | #include "ww.h" | |
e908bfac | 6 | #include "tt.h" |
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7 | |
8 | /* | |
9 | * Clear w to the end of line. | |
10 | * If cleared is true, then the screen line has already been cleared | |
11 | * previously. | |
12 | */ | |
f2a77fe1 | 13 | wwclreol1(w, row, col, cleared) |
a43a8870 | 14 | register struct ww *w; |
f2a77fe1 | 15 | int row, col; |
14f251df | 16 | char cleared; |
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17 | { |
18 | register i; | |
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19 | int nblank, ncleared; |
20 | ||
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21 | /* |
22 | * Clear the buffer right off | |
23 | */ | |
24 | { | |
25 | register union ww_char *buf; | |
26 | ||
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27 | buf = &w->ww_buf[row][col]; |
28 | for (i = w->ww_b.r - col; --i >= 0;) | |
a43a8870 | 29 | buf++->c_w = ' '; |
a43a8870 | 30 | } |
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31 | |
32 | /* | |
33 | * If can't see it, just return. | |
34 | */ | |
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35 | if (row < w->ww_i.t || row >= w->ww_i.b |
36 | || w->ww_i.r <= 0 || w->ww_i.r <= col) | |
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37 | return; |
38 | ||
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39 | if (col < w->ww_i.l) |
40 | col = w->ww_i.l; | |
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41 | |
42 | /* | |
43 | * Now find out how much is actually cleared, and fix wwns. | |
44 | */ | |
45 | { | |
46 | register union ww_char *s; | |
47 | register char *smap, *win; | |
48 | register char *touched; | |
49 | ||
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50 | smap = &wwsmap[row][col]; |
51 | s = &wwns[row][col]; | |
52 | touched = &wwtouched[row]; | |
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53 | win = &w->ww_win[row][col]; |
54 | ncleared = nblank = 0; | |
55 | ||
f2a77fe1 | 56 | for (i = w->ww_i.r - col; --i >= 0;) { |
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57 | if (*smap++ != w->ww_index) { |
58 | if (s++->c_w == ' ') | |
59 | nblank++; | |
60 | win++; | |
61 | continue; | |
62 | } | |
63 | ncleared++; | |
64 | *touched = 1; | |
65 | if (*win == 0) { | |
a43a8870 | 66 | nblank++; |
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67 | s++->c_w = ' '; |
68 | win++; | |
69 | } else | |
70 | s++->c_w = ' ' | *win++ << WWC_MSHIFT; | |
a43a8870 | 71 | } |
a43a8870 | 72 | } |
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73 | |
74 | /* | |
75 | * Can/Should we use clear eol? | |
76 | */ | |
a43a8870 | 77 | if (!cleared && tt.tt_clreol != 0 |
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78 | && ncleared > wwncol - col - nblank |
79 | && nblank > (wwncol - col) / 2) { | |
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80 | register union ww_char *s; |
81 | ||
a43a8870 | 82 | /* clear to the end */ |
f2a77fe1 | 83 | (*tt.tt_move)(row, col); |
a43a8870 | 84 | (*tt.tt_clreol)(); |
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85 | s = &wwos[row][col]; |
86 | for (i = wwncol - col; --i >= 0;) | |
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87 | s++->c_w = ' '; |
88 | } | |
89 | } |