/*************************************************************************/ /**
																			 *****************************************************************************
																			 * @file   tty.h
																			 * @brief
																			 * @author Forrest Y. Yu
																			 * @date   2005
																			 *****************************************************************************
																			 *****************************************************************************/

/**********************************************************
 *	tty.h       //added by mingxuan 2019-5-17
 ***********************************************************/

#ifndef _ORANGES_TTY_H_
#define _ORANGES_TTY_H_

#define TTY_IN_BYTES 256  /* tty input queue size */
#define TTY_OUT_BUF_LEN 2 /* tty output buffer size */

/*  TTY state (3bit)
	wait_enter  wait_space  display
		1/0        1/0        1/0
*/

#define TTY_STATE_WAIT_ENTER 4 /*100*/
#define TTY_STATE_WAIT_SPACE 2 /*010*/
#define TTY_STATE_DISPLAY 1	   /*001*/

struct s_tty;
struct s_console;

/* TTY */
typedef struct s_tty
{
	u32 ibuf[TTY_IN_BYTES]; /* TTY input buffer */
	u32 *ibuf_head;			/* the next free slot */
	u32 *ibuf_tail;			/* 缓冲区显示位置指针 */
	u32 *ibuf_read;
	int ibuf_cnt; /* how many */
	int ibuf_read_cnt;
	int status;

	int mouse_left_button;
	int mouse_mid_button;
	int mouse_X;
	int mouse_Y;

	struct s_console *console;
} TTY;

typedef struct MouseState
{
	u8 mouse_lb;
	u8 mouse_mb;
	u8 mouse_rb;
	signed char mouse_scroll;
	int mouse_x;
	int mouse_y;
} MouseState;

typedef struct n_tty
{
	int driver_type; // 1-vga&kbd; 2-serial
	MouseState mouse;
	void *input_buf;
	void *output_buf;
} NTTY;

enum CSI_state
{
	CSI_ESC,
	CSI_BRACKET,
	CSI_PARAM1,
	CSI_PARAM2
};
typedef struct vga_buf
{
	void *buf;		  // 2d array, screen size, for text mode it's [maxline][80]
	int max_line;	  // to support scroll, max line should be a lot more than screen
	int scr_top_line; // the index in buf of top line on screen;
	int scr_cur_line; // the index in buf of the cursor's line
	int head_line;	  // for circular buffer use
	int cur_row;
	int cur_col; // cursor position, on screen

	enum CSI_state CSI;
	i16 param1; // the first param of CSI
	i16 param2; // the second of CSI
	u16 color;
} vga_buf;

typedef struct keyboard_buf {
	void* buf; // 1d array, buffer input virtual line, works as a ldisc
	int tail;
	int head;
	int len;
	int readable;
} keyboard_buf;

#include "console.h"

void select_console(int nr_console);
void init_screen(TTY *tty);
void out_char(CONSOLE *con, char ch);
int is_current_console(CONSOLE *con);

int init_serial();
char read_serial();
void write_serial(char a);

void vga_tty_init(NTTY* tty);
void vga_tty_write(NTTY* tty, char ch);
void vga_tty_flush(NTTY* tty);
void vga_tty_backspace(NTTY* tty);
void ps2_tty_init(NTTY* tty);
int ps2_tty_read(NTTY* tty, u8* buf, int nr);


#define CYCLE_SUB(head, tail, _max) ((head) < (tail) ? (tail)-(head) : (tail) + (_max) - (head))
#define NEXT(x, _max) (((x) + 1) % (_max))
#define LAST(x, _max) (((x) - 1) >= 0 ? ((x) - 1) % (_max) : (_max) - 1)
#define DEBUGNEW
#define FOREGROUND(color) ((u16)(color & 0xf) << 8)
#define BACKGROUND(color) ((u16)(color & 0xf) << 12)

extern int cur_ntty;
extern NTTY ntty_table[3];
#endif /* _ORANGES_TTY_H_ */