Annotation of src/usr.bin/window/wwdelete.c, Revision 1.1
1.1 ! deraadt 1: /* $NetBSD: wwdelete.c,v 1.3 1995/09/28 10:35:23 tls Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1983, 1993
! 5: * The Regents of the University of California. All rights reserved.
! 6: *
! 7: * This code is derived from software contributed to Berkeley by
! 8: * Edward Wang at The University of California, Berkeley.
! 9: *
! 10: * Redistribution and use in source and binary forms, with or without
! 11: * modification, are permitted provided that the following conditions
! 12: * are met:
! 13: * 1. Redistributions of source code must retain the above copyright
! 14: * notice, this list of conditions and the following disclaimer.
! 15: * 2. Redistributions in binary form must reproduce the above copyright
! 16: * notice, this list of conditions and the following disclaimer in the
! 17: * documentation and/or other materials provided with the distribution.
! 18: * 3. All advertising materials mentioning features or use of this software
! 19: * must display the following acknowledgement:
! 20: * This product includes software developed by the University of
! 21: * California, Berkeley and its contributors.
! 22: * 4. Neither the name of the University nor the names of its contributors
! 23: * may be used to endorse or promote products derived from this software
! 24: * without specific prior written permission.
! 25: *
! 26: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 28: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 29: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 30: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 31: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 32: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 33: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 34: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 35: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 36: * SUCH DAMAGE.
! 37: */
! 38:
! 39: #ifndef lint
! 40: #if 0
! 41: static char sccsid[] = "@(#)wwdelete.c 8.1 (Berkeley) 6/6/93";
! 42: #else
! 43: static char rcsid[] = "$NetBSD: wwdelete.c,v 1.3 1995/09/28 10:35:23 tls Exp $";
! 44: #endif
! 45: #endif /* not lint */
! 46:
! 47: #include "ww.h"
! 48:
! 49: /*
! 50: * Pull w free from the cover list.
! 51: */
! 52: wwdelete(w)
! 53: register struct ww *w;
! 54: {
! 55: register i;
! 56:
! 57: for (i = w->ww_i.t; i < w->ww_i.b; i++) {
! 58: register j;
! 59: register char *smap = wwsmap[i];
! 60: register union ww_char *ns = wwns[i];
! 61: register int nchanged = 0;
! 62:
! 63: for (j = w->ww_i.l; j < w->ww_i.r; j++)
! 64: if (smap[j] == w->ww_index) {
! 65: smap[j] = WWX_NOBODY;
! 66: ns[j].c_w = ' ';
! 67: nchanged++;
! 68: }
! 69: if (nchanged > 0)
! 70: wwtouched[i] |= WWU_TOUCHED;
! 71: }
! 72:
! 73: {
! 74: register struct ww *wp;
! 75:
! 76: for (wp = w->ww_forw; wp != &wwhead; wp = wp->ww_forw)
! 77: wp->ww_order--;
! 78: }
! 79:
! 80: if (w->ww_forw != &wwhead)
! 81: wwdelete1(w->ww_forw,
! 82: w->ww_i.t, w->ww_i.b, w->ww_i.l, w->ww_i.r);
! 83:
! 84: w->ww_back->ww_forw = w->ww_forw;
! 85: w->ww_forw->ww_back = w->ww_back;
! 86: w->ww_forw = w->ww_back = 0;
! 87: }
! 88:
! 89: wwdelete1(w, t, b, l, r)
! 90: register struct ww *w;
! 91: {
! 92: int i;
! 93: int tt, bb, ll, rr;
! 94: char hasglass;
! 95:
! 96: again:
! 97: hasglass = 0;
! 98: tt = MAX(t, w->ww_i.t);
! 99: bb = MIN(b, w->ww_i.b);
! 100: ll = MAX(l, w->ww_i.l);
! 101: rr = MIN(r, w->ww_i.r);
! 102: if (tt >= bb || ll >= rr) {
! 103: if ((w = w->ww_forw) == &wwhead)
! 104: return;
! 105: goto again;
! 106: }
! 107: for (i = tt; i < bb; i++) {
! 108: register j;
! 109: register char *smap = wwsmap[i];
! 110: register union ww_char *ns = wwns[i];
! 111: register char *win = w->ww_win[i];
! 112: register union ww_char *buf = w->ww_buf[i];
! 113: int nvis = w->ww_nvis[i];
! 114: int nchanged = 0;
! 115:
! 116: for (j = ll; j < rr; j++) {
! 117: if (smap[j] != WWX_NOBODY)
! 118: continue;
! 119: if (win[j] & WWM_GLS) {
! 120: hasglass = 1;
! 121: continue;
! 122: }
! 123: smap[j] = w->ww_index;
! 124: ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT;
! 125: nchanged++;
! 126: if (win[j] == 0)
! 127: nvis++;
! 128: }
! 129: if (nchanged > 0)
! 130: wwtouched[i] |= WWU_TOUCHED;
! 131: w->ww_nvis[i] = nvis;
! 132: }
! 133: if ((w = w->ww_forw) == &wwhead)
! 134: return;
! 135: if (hasglass)
! 136: goto again;
! 137: if (tt > t)
! 138: wwdelete1(w, t, tt, l, r);
! 139: if (bb < b)
! 140: wwdelete1(w, bb, b, l, r);
! 141: if (ll > l)
! 142: wwdelete1(w, tt, bb, l, ll);
! 143: if (rr < r)
! 144: wwdelete1(w, tt, bb, rr, r);
! 145: }
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