usr.bin/window/wwadd.c

   1 /*      $NetBSD: wwadd.c,v 1.7 2003/08/07 11:17:35 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[] = "@(#)wwadd.c     8.1 (Berkeley) 6/6/93";
  39 #else
  40 __RCSID("$NetBSD: wwadd.c,v 1.7 2003/08/07 11:17:35 agc Exp $");
  41 #endif
  42 #endif /* not lint */
  43
  44 #include "ww.h"
  45
  46 /*
  47  * Stick w1 behind w2.
  48  */
  49 void
  50 wwadd(struct ww *w1, struct ww *w2)
  51 {
  52         int i;
  53         struct ww *w;
  54
  55         w1->ww_order = w2->ww_order + 1;
  56         w1->ww_back = w2;
  57         w1->ww_forw = w2->ww_forw;
  58         w2->ww_forw->ww_back = w1;
  59         w2->ww_forw = w1;
  60
  61         for (w = w1->ww_forw; w != &wwhead; w = w->ww_forw)
  62                 w->ww_order++;
  63         for (i = w1->ww_i.t; i < w1->ww_i.b; i++) {
  64                 int j;
  65                 unsigned char *smap = wwsmap[i];
  66                 char *win = w1->ww_win[i];
  67                 union ww_char *ns = wwns[i];
  68                 union ww_char *buf = w1->ww_buf[i];
  69                 int nvis = 0;
  70                 int nchanged = 0;
  71
  72                 for (j = w1->ww_i.l; j < w1->ww_i.r; j++) {
  73                         w = wwindex[smap[j]];
  74                         if (w1->ww_order > w->ww_order)
  75                                 continue;
  76                         if (win[j] & WWM_GLS)
  77                                 continue;
  78                         if (w != &wwnobody && w->ww_win[i][j] == 0)
  79                                 w->ww_nvis[i]--;
  80                         smap[j] = w1->ww_index;
  81                         if (win[j] == 0)
  82                                 nvis++;
  83                         ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT;
  84                         nchanged++;
  85                 }
  86                 if (nchanged > 0)
  87                         wwtouched[i] |= WWU_TOUCHED;
  88                 w1->ww_nvis[i] = nvis;
  89         }
  90 }