1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Edward Wang at The University of California, Berkeley. 7 * 8 * %sccs.include.redist.c% 9 */ 10 11 #ifndef lint 12 static char sccsid[] = "@(#)wwdelete.c 8.1 (Berkeley) 06/06/93"; 13 #endif /* not lint */ 14 15 #include "ww.h" 16 17 /* 18 * Pull w free from the cover list. 19 */ 20 wwdelete(w) 21 register struct ww *w; 22 { 23 register i; 24 25 for (i = w->ww_i.t; i < w->ww_i.b; i++) { 26 register j; 27 register char *smap = wwsmap[i]; 28 register union ww_char *ns = wwns[i]; 29 register int nchanged = 0; 30 31 for (j = w->ww_i.l; j < w->ww_i.r; j++) 32 if (smap[j] == w->ww_index) { 33 smap[j] = WWX_NOBODY; 34 ns[j].c_w = ' '; 35 nchanged++; 36 } 37 if (nchanged > 0) 38 wwtouched[i] |= WWU_TOUCHED; 39 } 40 41 { 42 register struct ww *wp; 43 44 for (wp = w->ww_forw; wp != &wwhead; wp = wp->ww_forw) 45 wp->ww_order--; 46 } 47 48 if (w->ww_forw != &wwhead) 49 wwdelete1(w->ww_forw, 50 w->ww_i.t, w->ww_i.b, w->ww_i.l, w->ww_i.r); 51 52 w->ww_back->ww_forw = w->ww_forw; 53 w->ww_forw->ww_back = w->ww_back; 54 w->ww_forw = w->ww_back = 0; 55 } 56 57 wwdelete1(w, t, b, l, r) 58 register struct ww *w; 59 { 60 int i; 61 int tt, bb, ll, rr; 62 char hasglass; 63 64 again: 65 hasglass = 0; 66 tt = MAX(t, w->ww_i.t); 67 bb = MIN(b, w->ww_i.b); 68 ll = MAX(l, w->ww_i.l); 69 rr = MIN(r, w->ww_i.r); 70 if (tt >= bb || ll >= rr) { 71 if ((w = w->ww_forw) == &wwhead) 72 return; 73 goto again; 74 } 75 for (i = tt; i < bb; i++) { 76 register j; 77 register char *smap = wwsmap[i]; 78 register union ww_char *ns = wwns[i]; 79 register char *win = w->ww_win[i]; 80 register union ww_char *buf = w->ww_buf[i]; 81 int nvis = w->ww_nvis[i]; 82 int nchanged = 0; 83 84 for (j = ll; j < rr; j++) { 85 if (smap[j] != WWX_NOBODY) 86 continue; 87 if (win[j] & WWM_GLS) { 88 hasglass = 1; 89 continue; 90 } 91 smap[j] = w->ww_index; 92 ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT; 93 nchanged++; 94 if (win[j] == 0) 95 nvis++; 96 } 97 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 } 114