xref: /freebsd/contrib/ncurses/menu/m_sub.c (revision 21817992b3314c908ab50f0bb88d2ee750b9c4ac)

/****************************************************************************
 * Copyright 2020,2021 Thomas E. Dickey                                     *
 * Copyright 1998-2009,2010 Free Software Foundation, Inc.                  *
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 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
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 * copies of the Software, and to permit persons to whom the Software is    *
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 *                                                                          *
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 ****************************************************************************/

/****************************************************************************
 *   Author:  Juergen Pfeifer, 1995,1997                                    *
 ****************************************************************************/

/***************************************************************************
* Module m_sub                                                             *
* Menus subwindow association routines                                     *
***************************************************************************/

#include "menu.priv.h"

MODULE_ID("$Id: m_sub.c,v 1.16 2021/06/17 21:20:30 tom Exp $")

/*---------------------------------------------------------------------------
|   Facility      :  libnmenu
|   Function      :  int set_menu_sub(MENU *menu, WINDOW *win)
|
|   Description   :  Sets the subwindow of the menu.
|
|   Return Values :  E_OK           - success
|                    E_POSTED       - menu is already posted
+--------------------------------------------------------------------------*/
MENU_EXPORT(int)
set_menu_sub(MENU *menu, WINDOW *win)
{
  T((T_CALLED("set_menu_sub(%p,%p)"), (void *)menu, (void *)win));

  if (menu)
    {
      if (menu->status & _POSTED)
	RETURN(E_POSTED);
      else
#if NCURSES_SP_FUNCS
	{
	  /* We ensure that usersub is never null. So even if a null
	     WINDOW parameter is passed, we store the SCREENS stdscr.
	     The only MENU that can have a null usersub is the static
	     _nc_default_Menu.
	   */
	  SCREEN *sp = _nc_screen_of(menu->usersub);

	  menu->usersub = win ? win : sp->_stdscr;
	  _nc_Calculate_Item_Length_and_Width(menu);
	}
#else
	menu->usersub = win;
#endif
    }
  else
    _nc_Default_Menu.usersub = win;

  RETURN(E_OK);
}

/*---------------------------------------------------------------------------
|   Facility      :  libnmenu
|   Function      :  WINDOW* menu_sub(const MENU *menu)
|
|   Description   :  Returns a pointer to the subwindow of the menu
|
|   Return Values :  NULL on error, otherwise a pointer to the window
+--------------------------------------------------------------------------*/
MENU_EXPORT(WINDOW *)
menu_sub(const MENU *menu)
{
  const MENU *m = Normalize_Menu(menu);

  T((T_CALLED("menu_sub(%p)"), (const void *)menu));
  returnWin(Get_Menu_Window(m));
}

/* m_sub.c ends here */