usr.bin/window/wwmove.c

   1 /*      $NetBSD: wwmove.c,v 1.6 2002/06/14 01:07:00 wiz 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[] = "@(#)wwmove.c    8.1 (Berkeley) 6/6/93";
  39 #else
  40 __RCSID("$NetBSD: wwmove.c,v 1.6 2002/06/14 01:07:00 wiz Exp $");
  41 #endif
  42 #endif /* not lint */
  43
  44 #include "ww.h"
  45
  46 /*
  47  * Move a window.  Should be unattached.
  48  */
  49 void
  50 wwmove(struct ww *w, int row, int col)
  51 {
  52         int dr, dc;
  53         int i;
  54
  55         dr = row - w->ww_w.t;
  56         dc = col - w->ww_w.l;
  57
  58         w->ww_w.t += dr;
  59         w->ww_w.b += dr;
  60         w->ww_w.l += dc;
  61         w->ww_w.r += dc;
  62
  63         w->ww_b.t += dr;
  64         w->ww_b.b += dr;
  65         w->ww_b.l += dc;
  66         w->ww_b.r += dc;
  67
  68         w->ww_i.t = MAX(w->ww_w.t, 0);
  69         w->ww_i.b = MIN(w->ww_w.b, wwnrow);
  70         w->ww_i.nr = w->ww_i.b - w->ww_i.t;
  71         w->ww_i.l = MAX(w->ww_w.l, 0);
  72         w->ww_i.r = MIN(w->ww_w.r, wwncol);
  73         w->ww_i.nc = w->ww_i.r - w->ww_i.l;
  74
  75         w->ww_cur.r += dr;
  76         w->ww_cur.c += dc;
  77
  78         w->ww_win -= dr;
  79         for (i = w->ww_w.t; i < w->ww_w.b; i++)
  80                 w->ww_win[i] -= dc;
  81         if (w->ww_fmap != 0) {
  82                 w->ww_fmap -= dr;
  83                 for (i = w->ww_w.t; i < w->ww_w.b; i++)
  84                         w->ww_fmap[i] -= dc;
  85         }
  86         w->ww_nvis -= dr;
  87         for (i = w->ww_i.t; i < w->ww_i.b; i++) {
  88                 int j = w->ww_i.l;
  89                 char *win = &w->ww_win[i][j];
  90                 unsigned char *smap = &wwsmap[i][j];
  91                 int nvis = 0;
  92
  93                 for (; j < w->ww_i.r; j++, win++, smap++)
  94                         if (*win == 0 && *smap == w->ww_index)
  95                                 nvis++;
  96                 w->ww_nvis[i] = nvis;
  97         }
  98         w->ww_buf -= dr;
  99         for (i = w->ww_b.t; i < w->ww_b.b; i++)
 100                 w->ww_buf[i] -= dc;
 101 }