/*      $NetBSD: new.c,v 1.3 2015/11/02 02:45:25 kamil Exp $ */

/*
* Copyright (c) 2015 Valery Ushakov
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include <sys/cdefs.h>
__RCSID("$NetBSD: new.c,v 1.3 2015/11/02 02:45:25 kamil Exp $");

#include "panel_impl.h"

#include <assert.h>
#include <stdlib.h>


static PANEL *
_new_panel(WINDOW *w)
{
       PANEL *p;

       p = (PANEL *)malloc(sizeof(PANEL));
       if (__predict_false(p == NULL))
               return NULL;

       p->win = w;
       p->user = NULL;

       DECK_INSERT_TOP(p);
       return p;
}


PANEL *
new_panel(WINDOW *w)
{

       if (__predict_false(w == NULL))
               return NULL;

       if (__predict_false(w == stdscr))
               return NULL;

       /*
        * Ensure there's phantom panel for stdscr at (below) the
        * bottom.  We explicitly re-assign stdscr in case it changed.
        */
       if (TAILQ_EMPTY(&_deck)) {
               assert(PANEL_HIDDEN(&_stdscr_panel));

               _stdscr_panel.win = stdscr;
               DECK_INSERT_TOP(&_stdscr_panel);
       }

       return _new_panel(w);
}