/*
 * Copyright (c) 2016 Julien Palard.
 * All rights reserved.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

#ifndef __LW_TERMINAL_VT100_H__
#define __LW_TERMINAL_VT100_H__

#include <pthread.h>
#include "lw_terminal_parser.h"

/*
 * Source : http://vt100.net/docs/vt100-ug/chapter3.html
            http://vt100.net/docs/tp83/appendixb.html
 * It's a vt100 implementation, that implements ANSI control function.
 */

#define SCROLLBACK 3

#define MASK_LNM     1
#define MASK_DECCKM  2
#define MASK_DECANM  4
#define MASK_DECCOLM 8
#define MASK_DECSCLM 16
#define MASK_DECSCNM 32
#define MASK_DECOM   64
#define MASK_DECAWM  128
#define MASK_DECARM  256
#define MASK_DECINLM 512

#define LNM     20
#define DECCKM  1
#define DECANM  2
#define DECCOLM 3
#define DECSCLM 4
#define DECSCNM 5
#define DECOM   6
#define DECAWM  7
#define DECARM  8
#define DECINLM 9


#define SET_MODE(vt100, mode) ((vt100)->modes |= get_mode_mask(mode))
#define UNSET_MODE(vt100, mode) ((vt100)->modes &= ~get_mode_mask(mode))
#define MODE_IS_SET(vt100, mode) ((vt100)->modes & get_mode_mask(mode))

/*
** frozen_screen is the frozen part of the screen
** when margins are set.
** The top of the frozen_screen holds the top margin
** while the bottom holds the bottom margin.
*/
struct lw_terminal_vt100
{
    struct lw_terminal *lw_terminal;
    unsigned int width;
    unsigned int height;
    unsigned int x;
    unsigned int y;
    unsigned int saved_x;
    unsigned int saved_y;
    unsigned int margin_top;
    unsigned int margin_bottom;
    unsigned int top_line; /* Line at the top of the display */
    char         *screen;
    char         *frozen_screen;
    char         *tabulations;
    unsigned int selected_charset;
    unsigned int modes;
    char         *lines[80];
    void         (*master_write)(void *user_data, void *buffer, size_t len);
    void         *user_data;
    pthread_mutex_t mutex;
};

struct lw_terminal_vt100 *lw_terminal_vt100_init(void *user_data,
                                     void (*unimplemented)(struct lw_terminal* term_emul,
                                                           char *seq, char chr));
char lw_terminal_vt100_get(struct lw_terminal_vt100 *vt100, unsigned int x, unsigned int y);
const char **lw_terminal_vt100_getlines(struct lw_terminal_vt100 *vt100);
void lw_terminal_vt100_destroy(struct lw_terminal_vt100 *this);
void lw_terminal_vt100_read_str(struct lw_terminal_vt100 *this, char *buffer);

#endif