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


/*
 *      Copyright (c) 1997, by Sun Microsystems, Inc.
 *      All rights reserved.
 */

/* A panels subsystem built on curses--create a new panel */

/*LINTLIBRARY*/

#include <sys/types.h>
#include <stdlib.h>
#include <curses.h>
#include "private.h"

/* add_top - Put a new or hidden panel on top of the pile */
static void
add_top(PANEL *panel)
{
        if (!_Top_panel) {
                panel-> below = 0;
                _Bottom_panel = panel;
        } else {
                _Top_panel -> above = panel;
                panel -> below = _Top_panel;
        }

        _Top_panel = panel;
        panel -> above = 0;
        panel -> obscured = 0;
        _Panel_cnt++;

        /* Determine which panels the new panel obscures */

        _intersect_panel(panel);
}

/*  new_panel    */
PANEL *
new_panel(WINDOW *window)
{
        PANEL   *panel;
        int     lines, cols;

        /* create a panel */

        if (!window || !_alloc_overlap(_Panel_cnt) ||
            !(panel = (PANEL *) malloc(sizeof (PANEL))))
                return ((PANEL *) 0);

        panel -> win = window;
        getbegyx(window, panel -> wstarty, panel -> wstartx);
        getmaxyx(window, lines, cols);
        panel -> wendy = panel->wstarty + lines - 1;
        panel -> wendx = panel->wstartx + cols - 1;
        panel -> user = 0;

        /* put the new panel on top of the pile */

        add_top(panel);
        return (panel);
}

/*  show_panel    */
int
show_panel(PANEL *panel)
{
        /* Allocate the obscured nodes for the new panel */

        if (!panel || panel != panel -> below || !_alloc_overlap(_Panel_cnt))
                return (ERR);

        /* put the new panel on top of the pile */

        add_top(panel);
        (void) touchwin(panel -> win);
        return (OK);
}