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#ifndef _VT100_H
#define _VT100_H
#include <stdio.h>
#include <stdint.h>
typedef uint32_t ucs;
typedef struct
{
ucs ch;
uint32_t comb;
uint64_t attr;
} attrchar;
typedef struct
{
ucs ch;
uint32_t next;
} combc;
#define VT100_MAXTOK 16
enum
{
VT100_FLAG_CURSOR, // visible cursor
VT100_FLAG_KPAD, // application keypad mode
VT100_FLAG_AUTO_WRAP, // auto wrap at right margin
};
#define VT100_CJK_RIGHT 0xffffffff /* ch value of right-half of a CJK char */
#define VT100_ATTR_COLOR_MASK 0x3ffffff
#define VT100_ATTR_COLOR_TYPE 0x3000000
#define VT100_COLOR_OFF 0
#define VT100_COLOR_16 1
#define VT100_COLOR_256 2
#define VT100_COLOR_RGB 3
#define VT100_ATTR_BOLD 0x04000000
#define VT100_ATTR_DIM 0x08000000
#define VT100_ATTR_ITALIC 0x10000000
#define VT100_ATTR_UNDERLINE 0x20000000
#define VT100_ATTR_STRIKE 0x40000000
#define VT100_ATTR_INVERSE 0x0400000000000000
#define VT100_ATTR_BLINK 0x0800000000000000
#define VT100_ATTR_CJK 0x8000000000000000
typedef struct tty
{
/*=[ basic data ]=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/
int sx,sy; // screen size
int cx,cy; // cursor position
attrchar *scr; // screen buffer
combc *combs; // combining character chains
uint64_t attr; // current attribute
char *title; // window title
/*=[ internal vt state ]=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/
int s1,s2; // scrolling region
int save_cx,save_cy; // saved cursor position
uint64_t save_attr; // saved attribute
unsigned int G:2; // bitfield: do G0 and G1 use vt100 graphics?
unsigned int curG:1; // current G charset
unsigned int save_G:2; // saved G, curG
unsigned int save_curG:1;
// flags
int cp437 :1; // non-UTF-8
int allow_resize :1; // is input allowed to resize?
int opt_auto_wrap :1; // ?7: auto wrap at right margin
int opt_cursor :1; // ?25: show/hide cursor
int opt_kpad :1; // keypad: application/numeric
// UTF-8 state
ucs utf_char;
ucs utf_surrogate;
int utf_count;
// parser state
int state;
int ntok;
uint32_t tok[VT100_MAXTOK];
char *oscbuf;
int osclen; // length of current osc command
/*=[ listeners ]=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/
void *l_data;
// any private data
void (*l_char)(struct tty *vt, int x, int y, ucs ch, uint64_t attr, int width);
// after a character has been written to the screen
void (*l_comb)(struct tty *vt, int x, int y, ucs ch, uint64_t attr);
// after a combining character has been added
void (*l_cursor)(struct tty *vt, int x, int y);
// after the cursor has moved
void (*l_clear)(struct tty *vt, int x, int y, int len);
// after a chunk of screen has been cleared
// If an endpoint spills outside of the current line, it
// must go all the way to an end of screen.
// If the cursor moves, you'll get a separate l_cursor, although
// it is already in place during the l_clear call.
void (*l_scroll)(struct tty *vt, int nl);
// after the region s1<=y<s2 is scrolled nl lines
// * nl<0 -> scrolling backwards
// * nl>0 -> scrolling forwards
// The cursor is already moved.
void (*l_flag)(struct tty *vt, int f, int v);
// when a flag changes to v
void (*l_osc)(struct tty *vt, int cmd, const char *str);
// string command (window title, etc)
void (*l_resize)(struct tty *vt, int sx, int sy);
// after the terminal has been resized
void (*l_flush)(struct tty *vt);
// when a write chunk ends
void (*l_bell)(struct tty *vt);
// when an \a is received
void (*l_free)(struct tty *vt);
// before the terminal is destroyed
} *tty;
tty tty_init(int sx, int sy, int resizable);
int tty_resize(tty vt, int nsx, int nsy);
void tty_reset(tty vt);
void tty_free(tty vt);
void tty_write(tty vt, const char *buf, int len);
void tty_printf(tty vt, const char *fmt, ...) \
__attribute__((format (printf, 2, 3)));
tty tty_copy(tty vt);
uint32_t tty_color_convert(uint32_t c, uint32_t to);
void vtvt_dump(tty vt);
void vtvt_resize(tty vt, int sx, int sy);
void vtvt_attach(tty vt, FILE *f, int dump);
#endif
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