Commit | Line | Data |
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53069d72 | 1 | #ifndef lint |
60de5df9 | 2 | static char sccsid[] = "@(#)wwdelchar.c 3.11 %G%"; |
53069d72 EW |
3 | #endif |
4 | ||
60de5df9 EW |
5 | /* |
6 | * Copyright (c) 1983 Regents of the University of California, | |
7 | * All rights reserved. Redistribution permitted subject to | |
8 | * the terms of the Berkeley Software License Agreement. | |
9 | */ | |
10 | ||
53069d72 | 11 | #include "ww.h" |
e908bfac | 12 | #include "tt.h" |
53069d72 | 13 | |
f2a77fe1 | 14 | wwdelchar(w, row, col) |
53069d72 EW |
15 | register struct ww *w; |
16 | { | |
14f251df | 17 | register i; |
14f251df EW |
18 | int nvis; |
19 | ||
19f9784c EW |
20 | /* |
21 | * First, shift the line. | |
22 | */ | |
14f251df EW |
23 | { |
24 | register union ww_char *p, *q; | |
25 | ||
f2a77fe1 | 26 | p = &w->ww_buf[row][col]; |
14f251df | 27 | q = p + 1; |
f2a77fe1 | 28 | for (i = w->ww_b.r - col; --i > 0;) |
14f251df EW |
29 | *p++ = *q++; |
30 | p->c_w = ' '; | |
31 | } | |
19f9784c EW |
32 | |
33 | /* | |
34 | * If can't see it, just return. | |
35 | */ | |
f2a77fe1 EW |
36 | if (row < w->ww_i.t || row >= w->ww_i.b |
37 | || w->ww_i.r <= 0 || w->ww_i.r <= col) | |
14f251df | 38 | return; |
19f9784c | 39 | |
f2a77fe1 EW |
40 | if (col < w->ww_i.l) |
41 | col = w->ww_i.l; | |
19f9784c EW |
42 | |
43 | /* | |
44 | * Now find out how much is actually changed, and fix wwns. | |
45 | */ | |
14f251df EW |
46 | { |
47 | register union ww_char *buf; | |
48 | register char *win; | |
49 | register union ww_char *ns; | |
50 | register char *smap; | |
d069a508 | 51 | char touched; |
14f251df EW |
52 | |
53 | nvis = 0; | |
f2a77fe1 | 54 | smap = &wwsmap[row][col]; |
d069a508 EW |
55 | for (i = col; i < w->ww_i.r && *smap++ != w->ww_index; i++) |
56 | ; | |
57 | if (i >= w->ww_i.r) | |
14f251df | 58 | return; |
d069a508 EW |
59 | col = i; |
60 | buf = w->ww_buf[row]; | |
61 | win = w->ww_win[row]; | |
62 | ns = wwns[row]; | |
63 | smap = &wwsmap[row][i]; | |
64 | touched = wwtouched[row]; | |
65 | for (; i < w->ww_i.r; i++) { | |
66 | if (*smap++ != w->ww_index) | |
67 | continue; | |
04d70db4 | 68 | touched |= WWU_TOUCHED; |
d069a508 EW |
69 | if (win[i]) |
70 | ns[i].c_w = | |
71 | buf[i].c_w ^ win[i] << WWC_MSHIFT; | |
72 | else { | |
14f251df | 73 | nvis++; |
d069a508 | 74 | ns[i] = buf[i]; |
14f251df | 75 | } |
d069a508 EW |
76 | } |
77 | wwtouched[row] = touched; | |
14f251df | 78 | } |
19f9784c EW |
79 | |
80 | /* | |
81 | * Can/Should we use delete character? | |
82 | */ | |
f2a77fe1 | 83 | if (tt.tt_delchar != 0 && nvis > (wwncol - col) / 2) { |
14f251df EW |
84 | register union ww_char *p, *q; |
85 | ||
f2a77fe1 | 86 | (*tt.tt_move)(row, col); |
14f251df EW |
87 | (*tt.tt_delchar)(); |
88 | ||
f2a77fe1 | 89 | p = &wwos[row][col]; |
14f251df | 90 | q = p + 1; |
f2a77fe1 | 91 | for (i = wwncol - col; --i > 0;) |
14f251df EW |
92 | *p++ = *q++; |
93 | p->c_w = ' '; | |
94 | } | |
53069d72 | 95 | } |