ANSI

[unix-history] / usr / src / usr.bin / window / wwmove.c

/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Edward Wang at The University of California, Berkeley.
*
* %sccs.include.redist.c%
*/

#ifndef lint
static char sccsid[] = "@(#)wwmove.c    3.11 (Berkeley) %G%";
#endif /* not lint */

#include "ww.h"

/*
* Move a window.  Should be unattached.
*/
wwmove(w, row, col)
register struct ww *w;
{
       register dr, dc;
       register i;

       dr = row - w->ww_w.t;
       dc = col - w->ww_w.l;

       w->ww_w.t += dr;
       w->ww_w.b += dr;
       w->ww_w.l += dc;
       w->ww_w.r += dc;

       w->ww_b.t += dr;
       w->ww_b.b += dr;
       w->ww_b.l += dc;
       w->ww_b.r += dc;

       w->ww_i.t = MAX(w->ww_w.t, 0);
       w->ww_i.b = MIN(w->ww_w.b, wwnrow);
       w->ww_i.nr = w->ww_i.b - w->ww_i.t;
       w->ww_i.l = MAX(w->ww_w.l, 0);
       w->ww_i.r = MIN(w->ww_w.r, wwncol);
       w->ww_i.nc = w->ww_i.r - w->ww_i.l;

       w->ww_cur.r += dr;
       w->ww_cur.c += dc;

       w->ww_win -= dr;
       for (i = w->ww_w.t; i < w->ww_w.b; i++)
               w->ww_win[i] -= dc;
       if (w->ww_fmap != 0) {
               w->ww_fmap -= dr;
               for (i = w->ww_w.t; i < w->ww_w.b; i++)
                       w->ww_fmap[i] -= dc;
       }
       w->ww_nvis -= dr;
       for (i = w->ww_i.t; i < w->ww_i.b; i++) {
               register j = w->ww_i.l;
               register char *win = &w->ww_win[i][j];
               register char *smap = &wwsmap[i][j];
               int nvis = 0;

               for (; j < w->ww_i.r; j++, win++, smap++)
                       if (*win == 0 && *smap == w->ww_index)
                               nvis++;
               w->ww_nvis[i] = nvis;
       }
       w->ww_buf -= dr;
       for (i = w->ww_b.t; i < w->ww_b.b; i++)
               w->ww_buf[i] -= dc;
}