/*      @(#)wwmove.c    8.1 (Berkeley) 6/6/93   */
/*      $NetBSD: wwmove.c,v 1.7 2003/08/07 11:17:42 agc Exp $   */

/*
 * Copyright (c) 1983, 1993
 *      The 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.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "ww.h"

/*
 * Move a window.  Should be unattached.
 */
void
wwmove(struct ww *w, int row, int col)
{
        int dr, dc;
        int 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++) {
                int j = w->ww_i.l;
                char *win = &w->ww_win[i][j];
                unsigned 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;
}