m_item_vis.c revision 1.7 
1/* $OpenBSD: m_item_vis.c,v 1.7 2010/01/12 23:22:08 nicm Exp $ */
2
3/****************************************************************************
4 * Copyright (c) 1998-2003,2004 Free Software Foundation, Inc.              *
5 *                                                                          *
6 * Permission is hereby granted, free of charge, to any person obtaining a  *
7 * copy of this software and associated documentation files (the            *
8 * "Software"), to deal in the Software without restriction, including      *
9 * without limitation the rights to use, copy, modify, merge, publish,      *
10 * distribute, distribute with modifications, sublicense, and/or sell       *
11 * copies of the Software, and to permit persons to whom the Software is    *
12 * furnished to do so, subject to the following conditions:                 *
13 *                                                                          *
14 * The above copyright notice and this permission notice shall be included  *
15 * in all copies or substantial portions of the Software.                   *
16 *                                                                          *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
20 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
21 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
22 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
23 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
24 *                                                                          *
25 * Except as contained in this notice, the name(s) of the above copyright   *
26 * holders shall not be used in advertising or otherwise to promote the     *
27 * sale, use or other dealings in this Software without prior written       *
28 * authorization.                                                           *
29 ****************************************************************************/
30
31/****************************************************************************
32 *   Author:  Juergen Pfeifer, 1995,1997                                    *
33 ****************************************************************************/
34
35/***************************************************************************
36* Module m_item_vis                                                        *
37* Tell if menu item is visible                                             *
38***************************************************************************/
39
40#include "menu.priv.h"
41
42MODULE_ID("$Id: m_item_vis.c,v 1.7 2010/01/12 23:22:08 nicm Exp $")
43
44/*---------------------------------------------------------------------------
45|   Facility      :  libnmenu
46|   Function      :  bool item_visible(const ITEM *item)
47|
48|   Description   :  A item is visible if it currently appears in the
49|                    subwindow of a posted menu.
50|
51|   Return Values :  TRUE  if visible
52|                    FALSE if invisible
53+--------------------------------------------------------------------------*/
54NCURSES_EXPORT(bool)
55item_visible(const ITEM * item)
56{
57  MENU *menu;
58
59  T((T_CALLED("item_visible(%p)"), item));
60  if (item &&
61      (menu = item->imenu) &&
62      (menu->status & _POSTED) &&
63      ((menu->toprow + menu->arows) > (item->y)) &&
64      (item->y >= menu->toprow))
65    returnBool(TRUE);
66  else
67    returnBool(FALSE);
68}
69
70/* m_item_vis.c ends here */
71