OpenSolaris_b135/lib/libcurses/screen/wclrtobot.c

/*
 * 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.
 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

/*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);
}