contrib/ncurses-5.4/menu/m_item_cur.c

   1 /****************************************************************************
   2  * Copyright (c) 1998-2002,2003 Free Software Foundation, Inc.              *
   3  *                                                                          *
   4  * Permission is hereby granted, free of charge, to any person obtaining a  *
   5  * copy of this software and associated documentation files (the            *
   6  * "Software"), to deal in the Software without restriction, including      *
   7  * without limitation the rights to use, copy, modify, merge, publish,      *
   8  * distribute, distribute with modifications, sublicense, and/or sell       *
   9  * copies of the Software, and to permit persons to whom the Software is    *
  10  * furnished to do so, subject to the following conditions:                 *
  11  *                                                                          *
  12  * The above copyright notice and this permission notice shall be included  *
  13  * in all copies or substantial portions of the Software.                   *
  14  *                                                                          *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
  16  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
  18  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
  21  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
  22  *                                                                          *
  23  * Except as contained in this notice, the name(s) of the above copyright   *
  24  * holders shall not be used in advertising or otherwise to promote the     *
  25  * sale, use or other dealings in this Software without prior written       *
  26  * authorization.                                                           *
  27  ****************************************************************************/
  28
  29 /****************************************************************************
  30  *   Author:  Juergen Pfeifer, 1995,1997                                    *
  31  ****************************************************************************/
  32
  33 /***************************************************************************
  34 * Module m_item_cur                                                        *
  35 * Set and get current menus item                                           *
  36 ***************************************************************************/
  37
  38 #include "menu.priv.h"
  39
  40 MODULE_ID("$Id: m_item_cur.c,v 1.14 2003/10/25 15:23:42 tom Exp $")
  41
  42 /*---------------------------------------------------------------------------
  43 |   Facility      :  libnmenu
  44 |   Function      :  int set_current_item(MENU *menu, const ITEM *item)
  45 |
  46 |   Description   :  Make the item the current item
  47 |
  48 |   Return Values :  E_OK                - success
  49 +--------------------------------------------------------------------------*/
  50 NCURSES_EXPORT(int)
  51 set_current_item (MENU * menu, ITEM * item)
  52 {
  53   if (menu && item && (item->imenu==menu))
  54     {
  55       if ( menu->status & _IN_DRIVER )
  56         RETURN(E_BAD_STATE);
  57
  58       assert( menu->curitem );
  59       if (item != menu->curitem)
  60         {
  61           if (menu->status & _LINK_NEEDED)
  62             {
  63               /*
  64                * Items are available, but they are not linked together.
  65                * So we have to link here.
  66                */
  67               _nc_Link_Items(menu);
  68             }
  69           assert(menu->pattern);
  70           Reset_Pattern(menu);
  71           /* adjust the window to make item visible and update the menu */
  72           Adjust_Current_Item(menu,menu->toprow,item);
  73         }
  74     }
  75   else
  76     RETURN(E_BAD_ARGUMENT);
  77
  78   RETURN(E_OK);
  79 }
  80
  81 /*---------------------------------------------------------------------------
  82 |   Facility      :  libnmenu
  83 |   Function      :  ITEM *current_item(const MENU *menu)
  84 |
  85 |   Description   :  Return the menus current item
  86 |
  87 |   Return Values :  Item pointer or NULL if failure
  88 +--------------------------------------------------------------------------*/
  89 NCURSES_EXPORT(ITEM *)
  90 current_item (const MENU * menu)
  91 {
  92   return (menu && menu->items) ? menu->curitem : (ITEM *)0;
  93 }
  94
  95 /*---------------------------------------------------------------------------
  96 |   Facility      :  libnmenu
  97 |   Function      :  int item_index(const ITEM *)
  98 |
  99 |   Description   :  Return the logical index of this item.
 100 |
 101 |   Return Values :  The index or ERR if this is an invalid item pointer
 102 +--------------------------------------------------------------------------*/
 103 NCURSES_EXPORT(int)
 104 item_index (const ITEM *item)
 105 {
 106   return (item && item->imenu) ? item->index : ERR;
 107 }
 108
 109 /* m_item_cur.c ends here */