/*	Copyright (c) 1990 UNIX System Laboratories, Inc.	*/
/*	Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T	*/
/*	  All Rights Reserved  	*/

/*	THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF     	*/
/*	UNIX System Laboratories, Inc.                     	*/
/*	The copyright notice above does not evidence any   	*/
/*	actual or intended publication of such source code.	*/

/*	Copyright (c) 1987, 1988 Microsoft Corporation	*/
/*	  All Rights Reserved	*/

/*	This Module contains Proprietary Information of Microsoft  */
/*	Corporation and should be treated as Confidential.	   */

#ident	"@(#)xcplxcurses:insertln.c	1.1"

/*
 *	@(#) insertln.c 1.1 90/03/30 lxcurses:insertln.c
 */
# include	"ext.h"

/*
 *	This routine performs an insert-line on the window, leaving
 * (_cury,_curx) unchanged.
 *
 * 4/17/81 (Berkeley) @(#)insertln.c	1.4
 */
winsertln(win)
reg WINDOW	*win; {

	reg char	*temp;
	reg int		y;
	reg char	*end;

	temp = win->_y[win->_maxy-1];
	win->_firstch[win->_cury] = 0;
	win->_lastch[win->_cury] = win->_maxx - 1;
	for (y = win->_maxy - 1; y > win->_cury; --y) {
		win->_y[y] = win->_y[y-1];
		win->_firstch[y] = 0;
		win->_lastch[y] = win->_maxx - 1;
	}
	for (end = &temp[win->_maxx]; temp < end; )
		*temp++ = ' ';
	win->_y[win->_cury] = temp - win->_maxx;
	if (win->_cury == LINES - 1 && win->_y[LINES-1][COLS-1] != ' ')
		if (win->_scroll) {
			wrefresh(win);
			scroll(win);
			win->_cury--;
		}
		else
			return ERR;
	return OK;
}
