xref: /freebsd-10.2-release/contrib/ncurses/menu/m_item_vis.c

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/****************************************************************************
 *   Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1995,1997            *
 ****************************************************************************/

/***************************************************************************
* Module m_item_vis                                                        *
* Tell if menu item is visible                                             *
***************************************************************************/

#include "menu.priv.h"

MODULE_ID("$Id: m_item_vis.c,v 1.11 2000/12/10 02:16:48 tom Exp $")

/*---------------------------------------------------------------------------
|   Facility      :  libnmenu
|   Function      :  bool item_visible(const ITEM *item)
|
|   Description   :  A item is visible if it currently appears in the
|                    subwindow of a posted menu.
|
|   Return Values :  TRUE  if visible
|                    FALSE if invisible
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(bool)
item_visible (const ITEM * item)
{
  MENU *menu;

  if ( item                                               &&
      (menu=item->imenu)                                  &&
      (menu->status & _POSTED)                            &&
      ( (menu->toprow + menu->arows) > (item->y) )        &&
      ( item->y >= menu->toprow) )
    return TRUE;
  else
    return FALSE;
}

/* m_item_vis.c ends here */