/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1988 AT&T */
/*        All Rights Reserved   */

/*
 * University Copyright- Copyright (c) 1982, 1986, 1988
 * The Regents of the University of California
 * All Rights Reserved
 *
 * University Acknowledgment- Portions of this document are derived from
 * software developed by the University of California, Berkeley, and its
 * contributors.
 */

/*LINTLIBRARY*/

#include        <sys/types.h>
#include        "curses_inc.h"

/* This routine erases everything on the window. */
int
wclrtobot(WINDOW *win)
{
        bool    savimmed, savsync;
        int     cury = win->_cury;
        short   curx = win->_curx;

        if (win != curscr) {
                savimmed = win->_immed;
                savsync = win->_sync;
                win->_immed = win->_sync = FALSE;
        }

        /* set region to be clear */
        if (cury >= win->_tmarg && cury <= win->_bmarg)
                win->_cury = win->_bmarg;
        else
                win->_cury = win->_maxy - 1;

        win->_curx = 0;
        for (; win->_cury > cury; win->_cury--)
                (void) wclrtoeol(win);
        win->_curx = curx;
        (void) wclrtoeol(win);

        if (win == curscr)
                return (OK);

        /* not curscr */
        win->_sync = savsync;

        if (win->_sync)
                wsyncup(win);

        win->_flags |= _WINCHANGED;
        return ((win->_immed = savimmed) ? wrefresh(win) : OK);
}