Commit | Line | Data |
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a43a8870 | 1 | #ifndef lint |
2012dbdd | 2 | static char *sccsid = "@(#)wwclreol.c 3.12 84/01/06"; |
a43a8870 EW |
3 | #endif |
4 | ||
5 | #include "ww.h" | |
e908bfac | 6 | #include "tt.h" |
a43a8870 EW |
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; |
a43a8870 EW |
17 | { |
18 | register i; | |
2012dbdd | 19 | int gain; |
a43a8870 | 20 | |
19f9784c EW |
21 | /* |
22 | * Clear the buffer right off | |
23 | */ | |
24 | { | |
25 | register union ww_char *buf; | |
26 | ||
f2a77fe1 EW |
27 | buf = &w->ww_buf[row][col]; |
28 | for (i = w->ww_b.r - col; --i >= 0;) | |
a43a8870 | 29 | buf++->c_w = ' '; |
a43a8870 | 30 | } |
19f9784c EW |
31 | |
32 | /* | |
33 | * If can't see it, just return. | |
34 | */ | |
f2a77fe1 EW |
35 | if (row < w->ww_i.t || row >= w->ww_i.b |
36 | || w->ww_i.r <= 0 || w->ww_i.r <= col) | |
19f9784c EW |
37 | return; |
38 | ||
f2a77fe1 EW |
39 | if (col < w->ww_i.l) |
40 | col = w->ww_i.l; | |
19f9784c EW |
41 | |
42 | /* | |
43 | * Now find out how much is actually cleared, and fix wwns. | |
44 | */ | |
2012dbdd | 45 | if (cleared) { |
19f9784c EW |
46 | register union ww_char *s; |
47 | register char *smap, *win; | |
19f9784c | 48 | |
2012dbdd EW |
49 | i = col; |
50 | smap = &wwsmap[row][i]; | |
51 | s = &wwns[row][i]; | |
52 | win = &w->ww_win[row][i]; | |
53 | for (i = w->ww_i.r - i; --i >= 0;) { | |
54 | if (*smap++ != w->ww_index) | |
55 | continue; | |
56 | s++->c_w = ' ' | *win++ << WWC_MSHIFT; | |
57 | } | |
58 | } else { | |
59 | register union ww_char *s; | |
60 | register char *smap, *win; | |
61 | int ntouched = 0; | |
62 | ||
d069a508 EW |
63 | i = col; |
64 | smap = &wwsmap[row][i]; | |
04d70db4 | 65 | s = wwns[row]; |
d069a508 | 66 | win = w->ww_win[row]; |
2012dbdd | 67 | gain = 0; |
d069a508 | 68 | for (; i < w->ww_i.r; i++) { |
19f9784c | 69 | if (*smap++ != w->ww_index) { |
2012dbdd EW |
70 | if (s[i].c_w != ' ') |
71 | gain--; | |
04d70db4 | 72 | } else if (win[i] == 0) { |
04d70db4 | 73 | if (s[i].c_w != ' ') { |
2012dbdd EW |
74 | gain++; |
75 | ntouched++; | |
04d70db4 EW |
76 | s[i].c_w = ' '; |
77 | } | |
2012dbdd EW |
78 | } else { |
79 | short c = ' ' | win[i] << WWC_MSHIFT; | |
80 | if (s[i].c_w == c) | |
81 | gain--; | |
82 | else { | |
83 | s[i].c_w = c; | |
84 | ntouched++; | |
85 | } | |
86 | } | |
a43a8870 | 87 | } |
2012dbdd EW |
88 | s += i; |
89 | for (i = wwncol - i; --i >= 0;) | |
90 | if (s++->c_w != ' ') | |
91 | gain--; | |
92 | if (ntouched > 0) | |
04d70db4 | 93 | wwtouched[row] |= WWU_TOUCHED; |
a43a8870 | 94 | } |
19f9784c EW |
95 | |
96 | /* | |
97 | * Can/Should we use clear eol? | |
98 | */ | |
2012dbdd | 99 | if (!cleared && tt.tt_clreol != 0 && gain > 4) { |
19f9784c EW |
100 | register union ww_char *s; |
101 | ||
a43a8870 | 102 | /* clear to the end */ |
f2a77fe1 | 103 | (*tt.tt_move)(row, col); |
a43a8870 | 104 | (*tt.tt_clreol)(); |
f2a77fe1 EW |
105 | s = &wwos[row][col]; |
106 | for (i = wwncol - col; --i >= 0;) | |
a43a8870 EW |
107 | s++->c_w = ' '; |
108 | } | |
109 | } |