1 /****************************************************************************
2 * Copyright 2020,2021 Thomas E. Dickey *
3 * Copyright 1998-2004,2010 Free Software Foundation, Inc. *
4 * *
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6 * copy of this software and associated documentation files (the *
7 * "Software"), to deal in the Software without restriction, including *
8 * without limitation the rights to use, copy, modify, merge, publish, *
9 * distribute, distribute with modifications, sublicense, and/or sell *
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 * *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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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
41 MODULE_ID("$Id: m_item_vis.c,v 1.20 2021/06/17 21:20:30 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 +--------------------------------------------------------------------------*/
MENU_EXPORT(bool)53 MENU_EXPORT(bool)
54 item_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