/****************************************************************************
 * Copyright (c) 1998-2005,2009 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      *
 * without limitation the rights to use, copy, modify, merge, publish,      *
 * distribute, distribute with modifications, sublicense, and/or sell       *
 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
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 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
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 ****************************************************************************/

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

/* $Id: menu.priv.h,v 1.23 2009/02/28 21:02:57 juergen Exp $ */

/***************************************************************************
* Module menu.priv.h                                                       *
* Top level private header file for all libnmenu modules                   *
***************************************************************************/

#ifndef MENU_PRIV_H_incl
#define MENU_PRIV_H_incl 1

#include "curses.priv.h"
#include "mf_common.h"
#include "menu.h"

/* Backspace code */
#define BS (8)

extern NCURSES_EXPORT_VAR(ITEM) _nc_Default_Item;
extern NCURSES_EXPORT_VAR(MENU) _nc_Default_Menu;

/* Normalize item to default if none was given */
#define Normalize_Item( item ) ((item)=(item)?(item):&_nc_Default_Item)

/* Normalize menu to default if none was given */
#define Normalize_Menu( menu ) ((menu)=(menu)?(menu):&_nc_Default_Menu)

#define Get_Menu_Screen( menu ) (menu->userwin ? \
				 _nc_screen_of(menu->userwin) : CURRENT_SCREEN)

/* Get the user defined (framing) window of the menu */
#define Get_Menu_UserWin(menu) ((menu)->userwin ? \
    (menu)->userwin : CURRENT_SCREEN->_stdscr)

/* Normalize menu window */
#define Get_Menu_Window(  menu ) \
   ((menu)->usersub  ? (menu)->usersub  : Get_Menu_UserWin(menu))

/* menu specific status flags */
#define _LINK_NEEDED    (0x04)
#define _MARK_ALLOCATED (0x08)

#define ALL_MENU_OPTS (                 \
		       O_ONEVALUE     | \
		       O_SHOWDESC     | \
		       O_ROWMAJOR     | \
		       O_IGNORECASE   | \
		       O_SHOWMATCH    | \
		       O_NONCYCLIC    )

#define ALL_ITEM_OPTS (O_SELECTABLE)

/* Move to the window position of an item and draw it */
#define Move_And_Post_Item(menu,item) \
  {wmove((menu)->win,(menu)->spc_rows*(item)->y,((menu)->itemlen+(menu)->spc_cols)*(item)->x);\
   _nc_Post_Item((menu),(item));}

#define Move_To_Current_Item(menu,item) \
  if ( (item) != (menu)->curitem)\
    {\
      Move_And_Post_Item(menu,item);\
      Move_And_Post_Item(menu,(menu)->curitem);\
    }

/* This macro ensures, that the item becomes visible, if possible with the
   specified row as the top row of the window. If this is not possible,
   the top row will be adjusted and the value is stored in the row argument.
*/
#define Adjust_Current_Item(menu,row,item) \
  { if ((item)->y < row) \
      row = (item)->y;\
    if ( (item)->y >= (row + (menu)->arows) )\
      row = ( (item)->y < ((menu)->rows - row) ) ? \
            (item)->y : (menu)->rows - (menu)->arows;\
    _nc_New_TopRow_and_CurrentItem(menu,row,item); }

/* Reset the match pattern buffer */
#define Reset_Pattern(menu) \
  { (menu)->pindex = 0; \
    (menu)->pattern[0] = '\0'; }

#define UChar(c)	((unsigned char)(c))

/* Internal functions. */
extern NCURSES_EXPORT(void) _nc_Draw_Menu (const MENU *);
extern NCURSES_EXPORT(void) _nc_Show_Menu (const MENU *);
extern NCURSES_EXPORT(void) _nc_Calculate_Item_Length_and_Width (MENU *);
extern NCURSES_EXPORT(int)  _nc_Calculate_Text_Width(const TEXT *);
extern NCURSES_EXPORT(void) _nc_Post_Item (const MENU *, const ITEM *);
extern NCURSES_EXPORT(bool) _nc_Connect_Items (MENU *, ITEM **);
extern NCURSES_EXPORT(void) _nc_Disconnect_Items (MENU *);
extern NCURSES_EXPORT(void) _nc_New_TopRow_and_CurrentItem (MENU *,int, ITEM *);
extern NCURSES_EXPORT(void) _nc_Link_Items (MENU *);
extern NCURSES_EXPORT(int)  _nc_Match_Next_Character_In_Item_Name (MENU*,int,ITEM**);
extern NCURSES_EXPORT(int)  _nc_menu_cursor_pos (const MENU* menu, const ITEM* item,
				int* pY, int* pX);

#ifdef TRACE

#define returnItem(code)	TRACE_RETURN(code,item)
#define returnItemPtr(code)	TRACE_RETURN(code,item_ptr)
#define returnItemOpts(code)	TRACE_RETURN(code,item_opts)
#define returnMenu(code)	TRACE_RETURN(code,menu)
#define returnMenuHook(code)	TRACE_RETURN(code,menu_hook)
#define returnMenuOpts(code)	TRACE_RETURN(code,menu_opts)

extern NCURSES_EXPORT(ITEM *)	    _nc_retrace_item (ITEM *);
extern NCURSES_EXPORT(ITEM **)	    _nc_retrace_item_ptr (ITEM **);
extern NCURSES_EXPORT(Item_Options) _nc_retrace_item_opts (Item_Options);
extern NCURSES_EXPORT(MENU *)	    _nc_retrace_menu (MENU *);
extern NCURSES_EXPORT(Menu_Hook)    _nc_retrace_menu_hook (Menu_Hook);
extern NCURSES_EXPORT(Menu_Options) _nc_retrace_menu_opts (Menu_Options);

#else /* !TRACE */

#define returnItem(code)	return code
#define returnItemPtr(code)	return code
#define returnItemOpts(code)	return code
#define returnMenu(code)	return code
#define returnMenuHook(code)	return code
#define returnMenuOpts(code)	return code

#endif /* TRACE/!TRACE */

#endif /* MENU_PRIV_H_incl */
