window/wwmove.c

   1 /*      $NetBSD: wwmove.c,v 1.5 1997/11/21 08:37:35 lukem 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 #include <sys/cdefs.h>
  40 #ifndef lint
  41 #if 0
  42 static char sccsid[] = "@(#)wwmove.c    8.1 (Berkeley) 6/6/93";
  43 #else
  44 __RCSID("$NetBSD: wwmove.c,v 1.5 1997/11/21 08:37:35 lukem Exp $");
  45 #endif
  46 #endif /* not lint */
  47
  48 #include "ww.h"
  49
  50 /*
  51  * Move a window.  Should be unattached.
  52  */
  53 void
  54 wwmove(w, row, col)
  55         struct ww *w;
  56         int row, col;
  57 {
  58         int dr, dc;
  59         int i;
  60
  61         dr = row - w->ww_w.t;
  62         dc = col - w->ww_w.l;
  63
  64         w->ww_w.t += dr;
  65         w->ww_w.b += dr;
  66         w->ww_w.l += dc;
  67         w->ww_w.r += dc;
  68
  69         w->ww_b.t += dr;
  70         w->ww_b.b += dr;
  71         w->ww_b.l += dc;
  72         w->ww_b.r += dc;
  73
  74         w->ww_i.t = MAX(w->ww_w.t, 0);
  75         w->ww_i.b = MIN(w->ww_w.b, wwnrow);
  76         w->ww_i.nr = w->ww_i.b - w->ww_i.t;
  77         w->ww_i.l = MAX(w->ww_w.l, 0);
  78         w->ww_i.r = MIN(w->ww_w.r, wwncol);
  79         w->ww_i.nc = w->ww_i.r - w->ww_i.l;
  80
  81         w->ww_cur.r += dr;
  82         w->ww_cur.c += dc;
  83
  84         w->ww_win -= dr;
  85         for (i = w->ww_w.t; i < w->ww_w.b; i++)
  86                 w->ww_win[i] -= dc;
  87         if (w->ww_fmap != 0) {
  88                 w->ww_fmap -= dr;
  89                 for (i = w->ww_w.t; i < w->ww_w.b; i++)
  90                         w->ww_fmap[i] -= dc;
  91         }
  92         w->ww_nvis -= dr;
  93         for (i = w->ww_i.t; i < w->ww_i.b; i++) {
  94                 int j = w->ww_i.l;
  95                 char *win = &w->ww_win[i][j];
  96                 unsigned char *smap = &wwsmap[i][j];
  97                 int nvis = 0;
  98
  99                 for (; j < w->ww_i.r; j++, win++, smap++)
 100                         if (*win == 0 && *smap == w->ww_index)
 101                                 nvis++;
 102                 w->ww_nvis[i] = nvis;
 103         }
 104         w->ww_buf -= dr;
 105         for (i = w->ww_b.t; i < w->ww_b.b; i++)
 106                 w->ww_buf[i] -= dc;
 107 }