usr.bin/window/wwdelete.c

   1 /*      $NetBSD: wwdelete.c,v 1.7 2003/08/07 11:17:38 agc 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. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 #ifndef lint
  37 #if 0
  38 static char sccsid[] = "@(#)wwdelete.c  8.1 (Berkeley) 6/6/93";
  39 #else
  40 __RCSID("$NetBSD: wwdelete.c,v 1.7 2003/08/07 11:17:38 agc Exp $");
  41 #endif
  42 #endif /* not lint */
  43
  44 #include "ww.h"
  45
  46 /*
  47  * Pull w free from the cover list.
  48  */
  49 void
  50 wwdelete(struct ww *w)
  51 {
  52         int i;
  53
  54         for (i = w->ww_i.t; i < w->ww_i.b; i++) {
  55                 int j;
  56                 unsigned char *smap = wwsmap[i];
  57                 union ww_char *ns = wwns[i];
  58                 int nchanged = 0;
  59
  60                 for (j = w->ww_i.l; j < w->ww_i.r; j++)
  61                         if (smap[j] == w->ww_index) {
  62                                 smap[j] = WWX_NOBODY;
  63                                 ns[j].c_w = ' ';
  64                                 nchanged++;
  65                         }
  66                 if (nchanged > 0)
  67                         wwtouched[i] |= WWU_TOUCHED;
  68         }
  69
  70         {
  71                 struct ww *wp;
  72
  73                 for (wp = w->ww_forw; wp != &wwhead; wp = wp->ww_forw)
  74                         wp->ww_order--;
  75         }
  76
  77         if (w->ww_forw != &wwhead)
  78                 wwdelete1(w->ww_forw,
  79                         w->ww_i.t, w->ww_i.b, w->ww_i.l, w->ww_i.r);
  80
  81         w->ww_back->ww_forw = w->ww_forw;
  82         w->ww_forw->ww_back = w->ww_back;
  83         w->ww_forw = w->ww_back = 0;
  84 }
  85
  86 void
  87 wwdelete1(struct ww *w, int t, int b, int l, int r)
  88 {
  89         int i;
  90         int tt, bb, ll, rr;
  91         char hasglass;
  92
  93 again:
  94         hasglass = 0;
  95         tt = MAX(t, w->ww_i.t);
  96         bb = MIN(b, w->ww_i.b);
  97         ll = MAX(l, w->ww_i.l);
  98         rr = MIN(r, w->ww_i.r);
  99         if (tt >= bb || ll >= rr) {
 100                 if ((w = w->ww_forw) == &wwhead)
 101                         return;
 102                 goto again;
 103         }
 104         for (i = tt; i < bb; i++) {
 105                 int j;
 106                 unsigned char *smap = wwsmap[i];
 107                 union ww_char *ns = wwns[i];
 108                 char *win = w->ww_win[i];
 109                 union ww_char *buf = w->ww_buf[i];
 110                 int nvis = w->ww_nvis[i];
 111                 int nchanged = 0;
 112
 113                 for (j = ll; j < rr; j++) {
 114                         if (smap[j] != WWX_NOBODY)
 115                                 continue;
 116                         if (win[j] & WWM_GLS) {
 117                                 hasglass = 1;
 118                                 continue;
 119                         }
 120                         smap[j] = w->ww_index;
 121                         ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT;
 122                         nchanged++;
 123                         if (win[j] == 0)
 124                                 nvis++;
 125                 }
 126                 if (nchanged > 0)
 127                         wwtouched[i] |= WWU_TOUCHED;
 128                 w->ww_nvis[i] = nvis;
 129         }
 130         if ((w = w->ww_forw) == &wwhead)
 131                 return;
 132         if (hasglass)
 133                 goto again;
 134         if (tt > t)
 135                 wwdelete1(w, t, tt, l, r);
 136         if (bb < b)
 137                 wwdelete1(w, bb, b, l, r);
 138         if (ll > l)
 139                 wwdelete1(w, tt, bb, l, ll);
 140         if (rr < r)
 141                 wwdelete1(w, tt, bb, rr, r);
 142 }