2.11BSD/src/ucb/window/wwmove.c

#ifndef lint
static char sccsid[] = "@(#)wwmove.c	3.7 4/24/85";
#endif

/*
 * Copyright (c) 1983 Regents of the University of California,
 * All rights reserved.  Redistribution permitted subject to
 * the terms of the Berkeley Software License Agreement.
 */

#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;
}