/* $FreeBSD: src/include/histedit.h,v 1.5 1999/08/27 23:44:50 peter Exp $ */
/* $DragonFly: src/include/histedit.h,v 1.3 2003/11/14 01:01:43 dillon Exp $ */
/*	$NetBSD: histedit.h,v 1.5 1997/04/11 17:52:45 christos Exp $	*/

/*-
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Christos Zoulas of Cornell University.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)histedit.h	8.2 (Berkeley) 1/3/94
 */

/*
 * histedit.h: Line editor and history interface.
 */
#ifndef _h_editline
#define _h_editline

#include <sys/types.h>
#include <stdio.h>

/*
 * ==== Editing ====
 */
typedef struct editline EditLine;

/*
 * For user-defined function interface
 */
typedef struct lineinfo {
    const char *buffer;
    const char *cursor;
    const char *lastchar;
} LineInfo;


/*
 * EditLine editor function return codes.
 * For user-defined function interface
 */
#define	CC_NORM		0
#define	CC_NEWLINE	1
#define	CC_EOF		2
#define CC_ARGHACK	3
#define CC_REFRESH	4
#define	CC_CURSOR	5
#define	CC_ERROR	6
#define CC_FATAL	7
#define CC_REDISPLAY	8

/*
 * Initialization, cleanup, and resetting
 */
EditLine	*el_init	(const char *, FILE *, FILE *);
void		 el_reset	(EditLine *);
void		 el_end		(EditLine *);


/*
 * Get a line, a character or push a string back in the input queue
 */
const char    *el_gets	(EditLine *, int *);
int		 el_getc	(EditLine *, char *);
void		 el_push	(EditLine *, const char *);

/*
 * High level function internals control
 * Parses argc, argv array and executes builtin editline commands
 */
int		 el_parse	(EditLine *, int, char **); 

/*
 * Low level editline access function
 */
int 		 el_set		(EditLine *, int, ...);

/*
 * el_set/el_get parameters
 */
#define EL_PROMPT	0	/* , el_pfunc_t);		*/
#define EL_TERMINAL	1	/* , const char *);		*/
#define EL_EDITOR	2	/* , const char *);		*/
#define EL_SIGNAL	3	/* , int);			*/
#define	EL_BIND		4	/* , const char *, ..., NULL);	*/
#define	EL_TELLTC	5	/* , const char *, ..., NULL);	*/
#define	EL_SETTC	6	/* , const char *, ..., NULL);	*/
#define	EL_ECHOTC	7	/* , const char *, ..., NULL);	*/
#define	EL_SETTY	8	/* , const char *, ..., NULL);	*/
#define	EL_ADDFN	9	/* , const char *, const char *	*/
				/* , el_func_t);		*/
#define EL_HIST		10	/* , hist_fun_t, const char *);	*/

/*
 * Source named file or $PWD/.editrc or $HOME/.editrc
 */
int		el_source	(EditLine *, const char *);

/*
 * Must be called when the terminal changes size; If EL_SIGNAL
 * is set this is done automatically otherwise it is the responsibility
 * of the application
 */
void		 el_resize	(EditLine *);

void		 el_data_set	(EditLine *, void *);
void *		 el_data_get	(EditLine *);


/*
 * User-defined function interface.
 */
const LineInfo *el_line	(EditLine *);
int   		  el_insertstr	(EditLine *, char *);
void		  el_deletestr	(EditLine *, int);

/*
 * ==== History ====
 */

typedef struct history History;

typedef struct HistEvent {
    int 	  num;
    const char *str;
} HistEvent;

/*
 * History access functions.
 */
History *		history_init	(void);
void 			history_end	(History *);

const HistEvent *	history		(History *, int, ...);

#define H_FUNC		 0	/* , UTSL		*/
#define H_EVENT		 1	/* , const int);	*/
#define H_FIRST		 2	/* , void);		*/
#define H_LAST		 3	/* , void);		*/
#define H_PREV		 4	/* , void);		*/
#define H_NEXT		 5	/* , void);		*/
#define H_CURR		 6	/* , void);		*/
#define H_ADD		 7	/* , const char*);	*/
#define H_ENTER		 8	/* , const char*);	*/
#define H_END		 9	/* , void);		*/
#define H_NEXT_STR	10	/* , const char*);	*/
#define H_PREV_STR	11	/* , const char*);	*/
#define H_NEXT_EVENT	12	/* , const int);	*/
#define H_PREV_EVENT	13	/* , const int);	*/
#define H_LOAD		14	/* , const char *);	*/
#define H_SAVE		15	/* , const char *);	*/
#define H_CLEAR		16	/* , void);		*/

#endif /* _h_editline */