1 /* $NetBSD: del.c,v 1.3 2015/11/02 02:45:25 kamil Exp $ */
2
3 /*
4 * Copyright (c) 2015 Valery Ushakov
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 __RCSID("$NetBSD: del.c,v 1.3 2015/11/02 02:45:25 kamil Exp $");
30
31 #include "panel_impl.h"
32
33 #include <assert.h>
34 #include <stdlib.h>
35
36
37 int
del_panel(PANEL * p)38 del_panel(PANEL *p)
39 {
40
41 if (__predict_false(p == NULL))
42 return ERR;
43
44 (void) hide_panel(p);
45 free(p);
46
47 /*
48 * If the last panel is removed, remove the phantom stdscr
49 * panel as well.
50 *
51 * A program that wants to switch to a different screen with
52 * set_term(3), or ends and recreates curses session with
53 * endwin(3)/initscr(3), must delete all panels first, since
54 * their windows will become invalid. When it will create its
55 * first new panel afterwards, it will pick up new stdscr.
56 */
57 if (TAILQ_LAST(&_deck, deck) == &_stdscr_panel) {
58 (void) hide_panel(&_stdscr_panel);
59 assert(TAILQ_EMPTY(&_deck));
60 }
61
62 return OK;
63 }
64