1/****************************************************************************
2 * Copyright 2020 Thomas E. Dickey                                          *
3 * Copyright 1998-2004,2010 Free Software Foundation, Inc.                  *
4 *                                                                          *
5 * Permission is hereby granted, free of charge, to any person obtaining a  *
6 * copy of this software and associated documentation files (the            *
7 * "Software"), to deal in the Software without restriction, including      *
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10 * copies of the Software, and to permit persons to whom the Software is    *
11 * furnished to do so, subject to the following conditions:                 *
12 *                                                                          *
13 * The above copyright notice and this permission notice shall be included  *
14 * in all copies or substantial portions of the Software.                   *
15 *                                                                          *
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17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
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23 *                                                                          *
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27 * authorization.                                                           *
28 ****************************************************************************/
29
30/****************************************************************************
31 *   Author:  Juergen Pfeifer, 1995,1997                                    *
32 ****************************************************************************/
33
34/***************************************************************************
35* Module m_item_vis                                                        *
36* Tell if menu item is visible                                             *
37***************************************************************************/
38
39#include "menu.priv.h"
40
41MODULE_ID("$Id: m_item_vis.c,v 1.19 2020/12/12 00:38:08 tom Exp $")
42
43/*---------------------------------------------------------------------------
44|   Facility      :  libnmenu
45|   Function      :  bool item_visible(const ITEM *item)
46|
47|   Description   :  A item is visible if it currently appears in the
48|                    subwindow of a posted menu.
49|
50|   Return Values :  TRUE  if visible
51|                    FALSE if invisible
52+--------------------------------------------------------------------------*/
53MENU_EXPORT(bool)
54item_visible(const ITEM *item)
55{
56  MENU *menu;
57
58  T((T_CALLED("item_visible(%p)"), (const void *)item));
59  if (item &&
60      (menu = item->imenu) &&
61      (menu->status & _POSTED) &&
62      ((menu->toprow + menu->arows) > (item->y)) &&
63      (item->y >= menu->toprow))
64    returnBool(TRUE);
65  else
66    returnBool(FALSE);
67}
68
69/* m_item_vis.c ends here */
70