| | 1 | #ifndef lint |
| | 2 | static char sccsid[] = "@(#)wwdelete.c 3.13 %G%"; |
| | 3 | #endif |
| | 4 | |
| | 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 | |
| | 11 | #include "ww.h" |
| | 12 | |
| | 13 | /* |
| | 14 | * Pull w free from the cover list. |
| | 15 | */ |
| | 16 | wwdelete(w) |
| | 17 | register struct ww *w; |
| | 18 | { |
| | 19 | register i; |
| | 20 | |
| | 21 | for (i = w->ww_i.t; i < w->ww_i.b; i++) { |
| | 22 | register j; |
| | 23 | register char *smap = wwsmap[i]; |
| | 24 | register struct ww_char *ns = wwns[i]; |
| | 25 | register int nchanged = 0; |
| | 26 | |
| | 27 | for (j = w->ww_i.l; j < w->ww_i.r; j++) |
| | 28 | if (smap[j] == w->ww_index) { |
| | 29 | smap[j] = WWX_NOBODY; |
| | 30 | ns[j].c_w = ' '; |
| | 31 | nchanged++; |
| | 32 | } |
| | 33 | if (nchanged > 4) |
| | 34 | wwtouched[i] |= WWU_MAJOR|WWU_TOUCHED; |
| | 35 | else if (nchanged > 0) |
| | 36 | wwtouched[i] |= WWU_TOUCHED; |
| | 37 | } |
| | 38 | |
| | 39 | { |
| | 40 | register struct ww *wp; |
| | 41 | |
| | 42 | for (wp = w->ww_forw; wp != &wwhead; wp = wp->ww_forw) |
| | 43 | wp->ww_order--; |
| | 44 | } |
| | 45 | |
| | 46 | if (w->ww_forw != &wwhead) |
| | 47 | wwdelete1(w->ww_forw, |
| | 48 | w->ww_i.t, w->ww_i.b, w->ww_i.l, w->ww_i.r); |
| | 49 | |
| | 50 | w->ww_back->ww_forw = w->ww_forw; |
| | 51 | w->ww_forw->ww_back = w->ww_back; |
| | 52 | w->ww_forw = w->ww_back = 0; |
| | 53 | } |
| | 54 | |
| | 55 | wwdelete1(w, t, b, l, r) |
| | 56 | register struct ww *w; |
| | 57 | { |
| | 58 | int i; |
| | 59 | int tt, bb, ll, rr; |
| | 60 | char hasglass; |
| | 61 | |
| | 62 | again: |
| | 63 | hasglass = 0; |
| | 64 | tt = MAX(t, w->ww_i.t); |
| | 65 | bb = MIN(b, w->ww_i.b); |
| | 66 | ll = MAX(l, w->ww_i.l); |
| | 67 | rr = MIN(r, w->ww_i.r); |
| | 68 | if (tt >= bb || ll >= rr) { |
| | 69 | if ((w = w->ww_forw) == &wwhead) |
| | 70 | return; |
| | 71 | goto again; |
| | 72 | } |
| | 73 | for (i = tt; i < bb; i++) { |
| | 74 | register j; |
| | 75 | register char *smap = wwsmap[i]; |
| | 76 | register union ww_char *ns = wwns[i]; |
| | 77 | register char *win = w->ww_win[i]; |
| | 78 | register union ww_char *buf = w->ww_buf[i]; |
| | 79 | int nvis = w->ww_nvis[i]; |
| | 80 | int nchanged = 0; |
| | 81 | |
| | 82 | for (j = ll; j < rr; j++) { |
| | 83 | if (smap[j] != WWX_NOBODY) |
| | 84 | continue; |
| | 85 | if (win[j] & WWM_GLS) { |
| | 86 | hasglass = 1; |
| | 87 | continue; |
| | 88 | } |
| | 89 | smap[j] = w->ww_index; |
| | 90 | ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT; |
| | 91 | nchanged++; |
| | 92 | if (win[j] == 0) |
| | 93 | nvis++; |
| | 94 | } |
| | 95 | if (nchanged > 4) |
| | 96 | wwtouched[i] |= WWU_MAJOR|WWU_TOUCHED; |
| | 97 | else if (nchanged > 0) |
| | 98 | wwtouched[i] |= WWU_TOUCHED; |
| | 99 | w->ww_nvis[i] = nvis; |
| | 100 | } |
| | 101 | if ((w = w->ww_forw) == &wwhead) |
| | 102 | return; |
| | 103 | if (hasglass) |
| | 104 | goto again; |
| | 105 | if (tt > t) |
| | 106 | wwdelete1(w, t, tt, l, r); |
| | 107 | if (bb < b) |
| | 108 | wwdelete1(w, bb, b, l, r); |
| | 109 | if (ll > l) |
| | 110 | wwdelete1(w, tt, bb, l, ll); |
| | 111 | if (rr < r) |
| | 112 | wwdelete1(w, tt, bb, rr, r); |
| | 113 | } |
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