1 #ifndef lint 2 static char sccsid[] = "@(#)wwdelete.c 3.13 04/24/85"; 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 } 114