projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 60de5df9 | 1 | /* |
| 46e9ea25 KB |
2 | * Copyright (c) 1983 Regents of the University of California. |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms are permitted | |
| 5e8b0e60 KB |
6 | * provided that the above copyright notice and this paragraph are |
| 7 | * duplicated in all such forms and that any documentation, | |
| 8 | * advertising materials, and other materials related to such | |
| 9 | * distribution and use acknowledge that the software was developed | |
| 10 | * by the University of California, Berkeley. The name of the | |
| 11 | * University may not be used to endorse or promote products derived | |
| 12 | * from this software without specific prior written permission. | |
| 13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
| 14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
| 15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
| 60de5df9 EW |
16 | */ |
| 17 | ||
| 46e9ea25 | 18 | #ifndef lint |
| 2d152f42 | 19 | static char sccsid[] = "@(#)wwdelchar.c 3.14 (Berkeley) %G%"; |
| 46e9ea25 KB |
20 | #endif /* not lint */ |
| 21 | ||
| 53069d72 | 22 | #include "ww.h" |
| e908bfac | 23 | #include "tt.h" |
| 53069d72 | 24 | |
| f2a77fe1 | 25 | wwdelchar(w, row, col) |
| 53069d72 EW |
26 | register struct ww *w; |
| 27 | { | |
| 14f251df | 28 | register i; |
| 14f251df EW |
29 | int nvis; |
| 30 | ||
| 19f9784c EW |
31 | /* |
| 32 | * First, shift the line. | |
| 33 | */ | |
| 14f251df EW |
34 | { |
| 35 | register union ww_char *p, *q; | |
| 36 | ||
| f2a77fe1 | 37 | p = &w->ww_buf[row][col]; |
| 14f251df | 38 | q = p + 1; |
| f2a77fe1 | 39 | for (i = w->ww_b.r - col; --i > 0;) |
| 14f251df EW |
40 | *p++ = *q++; |
| 41 | p->c_w = ' '; | |
| 42 | } | |
| 19f9784c EW |
43 | |
| 44 | /* | |
| 45 | * If can't see it, just return. | |
| 46 | */ | |
| f2a77fe1 EW |
47 | if (row < w->ww_i.t || row >= w->ww_i.b |
| 48 | || w->ww_i.r <= 0 || w->ww_i.r <= col) | |
| 14f251df | 49 | return; |
| 19f9784c | 50 | |
| f2a77fe1 EW |
51 | if (col < w->ww_i.l) |
| 52 | col = w->ww_i.l; | |
| 19f9784c EW |
53 | |
| 54 | /* | |
| 55 | * Now find out how much is actually changed, and fix wwns. | |
| 56 | */ | |
| 14f251df EW |
57 | { |
| 58 | register union ww_char *buf; | |
| 59 | register char *win; | |
| 60 | register union ww_char *ns; | |
| 61 | register char *smap; | |
| d069a508 | 62 | char touched; |
| 14f251df EW |
63 | |
| 64 | nvis = 0; | |
| f2a77fe1 | 65 | smap = &wwsmap[row][col]; |
| d069a508 EW |
66 | for (i = col; i < w->ww_i.r && *smap++ != w->ww_index; i++) |
| 67 | ; | |
| 68 | if (i >= w->ww_i.r) | |
| 14f251df | 69 | return; |
| d069a508 EW |
70 | col = i; |
| 71 | buf = w->ww_buf[row]; | |
| 72 | win = w->ww_win[row]; | |
| 73 | ns = wwns[row]; | |
| 74 | smap = &wwsmap[row][i]; | |
| 75 | touched = wwtouched[row]; | |
| 76 | for (; i < w->ww_i.r; i++) { | |
| 77 | if (*smap++ != w->ww_index) | |
| 78 | continue; | |
| 04d70db4 | 79 | touched |= WWU_TOUCHED; |
| d069a508 EW |
80 | if (win[i]) |
| 81 | ns[i].c_w = | |
| 82 | buf[i].c_w ^ win[i] << WWC_MSHIFT; | |
| 83 | else { | |
| 14f251df | 84 | nvis++; |
| d069a508 | 85 | ns[i] = buf[i]; |
| 14f251df | 86 | } |
| d069a508 EW |
87 | } |
| 88 | wwtouched[row] = touched; | |
| 14f251df | 89 | } |
| 19f9784c EW |
90 | |
| 91 | /* | |
| 92 | * Can/Should we use delete character? | |
| 93 | */ | |
| f2a77fe1 | 94 | if (tt.tt_delchar != 0 && nvis > (wwncol - col) / 2) { |
| 14f251df EW |
95 | register union ww_char *p, *q; |
| 96 | ||
| 2d152f42 | 97 | xxdelchar(row, col); |
| f2a77fe1 | 98 | p = &wwos[row][col]; |
| 14f251df | 99 | q = p + 1; |
| f2a77fe1 | 100 | for (i = wwncol - col; --i > 0;) |
| 14f251df EW |
101 | *p++ = *q++; |
| 102 | p->c_w = ' '; | |
| 103 | } | |
| 53069d72 | 104 | } |