usr.bin/window/wwdelete.c

   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  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  * @(#)wwdelete.c       8.1 (Berkeley) 6/6/93
  37  * $FreeBSD: src/usr.bin/window/wwdelete.c,v 1.1.1.1.14.1 2001/05/17 09:45:01 obrien Exp $
  38  * $DragonFly: src/usr.bin/window/wwdelete.c,v 1.2 2003/06/17 06:29:34 dillon Exp $
  39  */
  40
  41 #include "ww.h"
  42
  43 /*
  44  * Pull w free from the cover list.
  45  */
  46 wwdelete(w)
  47 register struct ww *w;
  48 {
  49         register i;
  50
  51         for (i = w->ww_i.t; i < w->ww_i.b; i++) {
  52                 register j;
  53                 register char *smap = wwsmap[i];
  54                 register union ww_char *ns = wwns[i];
  55                 register int nchanged = 0;
  56
  57                 for (j = w->ww_i.l; j < w->ww_i.r; j++)
  58                         if (smap[j] == w->ww_index) {
  59                                 smap[j] = WWX_NOBODY;
  60                                 ns[j].c_w = ' ';
  61                                 nchanged++;
  62                         }
  63                 if (nchanged > 0)
  64                         wwtouched[i] |= WWU_TOUCHED;
  65         }
  66
  67         {
  68                 register struct ww *wp;
  69
  70                 for (wp = w->ww_forw; wp != &wwhead; wp = wp->ww_forw)
  71                         wp->ww_order--;
  72         }
  73
  74         if (w->ww_forw != &wwhead)
  75                 wwdelete1(w->ww_forw,
  76                         w->ww_i.t, w->ww_i.b, w->ww_i.l, w->ww_i.r);
  77
  78         w->ww_back->ww_forw = w->ww_forw;
  79         w->ww_forw->ww_back = w->ww_back;
  80         w->ww_forw = w->ww_back = 0;
  81 }
  82
  83 wwdelete1(w, t, b, l, r)
  84 register struct ww *w;
  85 {
  86         int i;
  87         int tt, bb, ll, rr;
  88         char hasglass;
  89
  90 again:
  91         hasglass = 0;
  92         tt = MAX(t, w->ww_i.t);
  93         bb = MIN(b, w->ww_i.b);
  94         ll = MAX(l, w->ww_i.l);
  95         rr = MIN(r, w->ww_i.r);
  96         if (tt >= bb || ll >= rr) {
  97                 if ((w = w->ww_forw) == &wwhead)
  98                         return;
  99                 goto again;
 100         }
 101         for (i = tt; i < bb; i++) {
 102                 register j;
 103                 register char *smap = wwsmap[i];
 104                 register union ww_char *ns = wwns[i];
 105                 register char *win = w->ww_win[i];
 106                 register union ww_char *buf = w->ww_buf[i];
 107                 int nvis = w->ww_nvis[i];
 108                 int nchanged = 0;
 109
 110                 for (j = ll; j < rr; j++) {
 111                         if (smap[j] != WWX_NOBODY)
 112                                 continue;
 113                         if (win[j] & WWM_GLS) {
 114                                 hasglass = 1;
 115                                 continue;
 116                         }
 117                         smap[j] = w->ww_index;
 118                         ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT;
 119                         nchanged++;
 120                         if (win[j] == 0)
 121                                 nvis++;
 122                 }
 123                 if (nchanged > 0)
 124                         wwtouched[i] |= WWU_TOUCHED;
 125                 w->ww_nvis[i] = nvis;
 126         }
 127         if ((w = w->ww_forw) == &wwhead)
 128                 return;
 129         if (hasglass)
 130                 goto again;
 131         if (tt > t)
 132                 wwdelete1(w, t, tt, l, r);
 133         if (bb < b)
 134                 wwdelete1(w, bb, b, l, r);
 135         if (ll > l)
 136                 wwdelete1(w, tt, bb, l, ll);
 137         if (rr < r)
 138                 wwdelete1(w, tt, bb, rr, r);
 139 }