1/* $OpenBSD: m_item_vis.c,v 1.8 2023/10/17 09:52:10 nicm Exp $ */
2
3/****************************************************************************
4 * Copyright 2020,2021 Thomas E. Dickey                                     *
5 * Copyright 1998-2004,2010 Free Software Foundation, Inc.                  *
6 *                                                                          *
7 * Permission is hereby granted, free of charge, to any person obtaining a  *
8 * copy of this software and associated documentation files (the            *
9 * "Software"), to deal in the Software without restriction, including      *
10 * without limitation the rights to use, copy, modify, merge, publish,      *
11 * distribute, distribute with modifications, sublicense, and/or sell       *
12 * copies of the Software, and to permit persons to whom the Software is    *
13 * furnished to do so, subject to the following conditions:                 *
14 *                                                                          *
15 * The above copyright notice and this permission notice shall be included  *
16 * in all copies or substantial portions of the Software.                   *
17 *                                                                          *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
21 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
24 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
25 *                                                                          *
26 * Except as contained in this notice, the name(s) of the above copyright   *
27 * holders shall not be used in advertising or otherwise to promote the     *
28 * sale, use or other dealings in this Software without prior written       *
29 * authorization.                                                           *
30 ****************************************************************************/
31
32/****************************************************************************
33 *   Author:  Juergen Pfeifer, 1995,1997                                    *
34 ****************************************************************************/
35
36/***************************************************************************
37* Module m_item_vis                                                        *
38* Tell if menu item is visible                                             *
39***************************************************************************/
40
41#include "menu.priv.h"
42
43MODULE_ID("$Id: m_item_vis.c,v 1.8 2023/10/17 09:52:10 nicm Exp $")
44
45/*---------------------------------------------------------------------------
46|   Facility      :  libnmenu
47|   Function      :  bool item_visible(const ITEM *item)
48|
49|   Description   :  A item is visible if it currently appears in the
50|                    subwindow of a posted menu.
51|
52|   Return Values :  TRUE  if visible
53|                    FALSE if invisible
54+--------------------------------------------------------------------------*/
55MENU_EXPORT(bool)
56item_visible(const ITEM *item)
57{
58  MENU *menu;
59
60  T((T_CALLED("item_visible(%p)"), (const void *)item));
61  if (item &&
62      (menu = item->imenu) &&
63      (menu->status & _POSTED) &&
64      ((menu->toprow + menu->arows) > (item->y)) &&
65      (item->y >= menu->toprow))
66    returnBool(TRUE);
67  else
68    returnBool(FALSE);
69}
70
71/* m_item_vis.c ends here */
72