xref: /freebsd-11.0-release/contrib/libreadline/keymaps.h

/* keymaps.h -- Manipulation of readline keymaps. */

/* Copyright (C) 1987, 1989, 1992 Free Software Foundation, Inc.

   This file is part of the GNU Readline Library, a library for
   reading lines of text with interactive input and history editing.

   The GNU Readline Library is free software; you can redistribute it
   and/or modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; either version 1, or
   (at your option) any later version.

   The GNU Readline Library is distributed in the hope that it will be
   useful, but WITHOUT ANY WARRANTY; without even the implied warranty
   of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   The GNU General Public License is often shipped with GNU software, and
   is generally kept in a file called COPYING or LICENSE.  If you do not
   have a copy of the license, write to the Free Software Foundation,
   675 Mass Ave, Cambridge, MA 02139, USA. */

#ifndef _KEYMAPS_H_
#define _KEYMAPS_H_

#if defined (READLINE_LIBRARY)
#  include "chardefs.h"
#else
#  include <readline/chardefs.h>
#endif

#if !defined (_FUNCTION_DEF)
#  define _FUNCTION_DEF
typedef int Function ();
typedef void VFunction ();
typedef char *CPFunction ();
typedef char **CPPFunction ();
#endif

/* A keymap contains one entry for each key in the ASCII set.
   Each entry consists of a type and a pointer.
   POINTER is the address of a function to run, or the
   address of a keymap to indirect through.
   TYPE says which kind of thing POINTER is. */
typedef struct _keymap_entry {
  char type;
  Function *function;
} KEYMAP_ENTRY;

/* This must be large enough to hold bindings for all of the characters
   in a desired character set (e.g, 128 for ASCII, 256 for ISO Latin-x,
   and so on). */
#define KEYMAP_SIZE 256

/* I wanted to make the above structure contain a union of:
   union { Function *function; struct _keymap_entry *keymap; } value;
   but this made it impossible for me to create a static array.
   Maybe I need C lessons. */

typedef KEYMAP_ENTRY KEYMAP_ENTRY_ARRAY[KEYMAP_SIZE];
typedef KEYMAP_ENTRY *Keymap;

/* The values that TYPE can have in a keymap entry. */
#define ISFUNC 0
#define ISKMAP 1
#define ISMACR 2

extern KEYMAP_ENTRY_ARRAY emacs_standard_keymap, emacs_meta_keymap, emacs_ctlx_keymap;
extern KEYMAP_ENTRY_ARRAY vi_insertion_keymap, vi_movement_keymap;

/* Return a new, empty keymap.
   Free it with free() when you are done. */
extern Keymap rl_make_bare_keymap ();

/* Return a new keymap which is a copy of MAP. */
extern Keymap rl_copy_keymap ();

/* Return a new keymap with the printing characters bound to rl_insert,
   the lowercase Meta characters bound to run their equivalents, and
   the Meta digits bound to produce numeric arguments. */
extern Keymap rl_make_keymap ();

extern void rl_discard_keymap ();

/* Return the keymap corresponding to a given name.  Names look like
   `emacs' or `emacs-meta' or `vi-insert'. */
extern Keymap rl_get_keymap_by_name ();

/* Return the current keymap. */
extern Keymap rl_get_keymap ();

/* Set the current keymap to MAP. */
extern void rl_set_keymap ();

#endif /* _KEYMAPS_H_ */