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freebsd/sys/teken/teken.h
Ed Schouten fbcd1b6eac Make SCS work in 8-bit mode. 
This means we can finally do things like VT100 box drawing when using
Syscons (8-bit characters). As far as I know, the only remaining issue
is the absense of proper escape sequences for special keyboard
characters (cursor, F1 to F12, etc) and xterm emulation should be ready
for general use.

Enabling xterm would have the following advantages:

- Easier possible migration to Unicode. cons25 termcap entries are very
  8-bit centric. They use things like CP437 characters for box drawing,
  etc.

- Better support for SSH'ing to other operating systems/devices. Most
  switches use VT100-style admin interfaces.

- Reduced bandwidth, because applications can now use things like
  scrolling regions.

- You can finally use applications like dtach(1) on both the console and
  inside an xterm.
2009-09-24 20:33:14 +00:00

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/*-
* Copyright (c) 2008-2009 Ed Schouten <ed@FreeBSD.org>
* 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 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 AUTHOR 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.
*
* $FreeBSD$
*/
#ifndef _TEKEN_H_
#define _TEKEN_H_
/*
* libteken: terminal emulation library.
*
* This library converts an UTF-8 stream of bytes to terminal drawing
* commands.
*/
typedef uint32_t teken_char_t;
typedef unsigned short teken_unit_t;
typedef unsigned char teken_format_t;
#define TF_BOLD 0x01
#define TF_UNDERLINE 0x02
#define TF_BLINK 0x04
#define TF_REVERSE 0x08
typedef unsigned char teken_color_t;
#define TC_BLACK 0
#define TC_RED 1
#define TC_GREEN 2
#define TC_BROWN 3
#define TC_BLUE 4
#define TC_MAGENTA 5
#define TC_CYAN 6
#define TC_WHITE 7
#define TC_NCOLORS 8
typedef struct {
teken_unit_t tp_row;
teken_unit_t tp_col;
} teken_pos_t;
typedef struct {
teken_pos_t tr_begin;
teken_pos_t tr_end;
} teken_rect_t;
typedef struct {
teken_format_t ta_format;
teken_color_t ta_fgcolor;
teken_color_t ta_bgcolor;
} teken_attr_t;
typedef struct {
teken_unit_t ts_begin;
teken_unit_t ts_end;
} teken_span_t;
typedef struct __teken teken_t;
typedef void teken_state_t(teken_t *, teken_char_t);
/*
* Drawing routines supplied by the user.
*/
typedef void tf_bell_t(void *);
typedef void tf_cursor_t(void *, const teken_pos_t *);
typedef void tf_putchar_t(void *, const teken_pos_t *, teken_char_t,
const teken_attr_t *);
typedef void tf_fill_t(void *, const teken_rect_t *, teken_char_t,
const teken_attr_t *);
typedef void tf_copy_t(void *, const teken_rect_t *, const teken_pos_t *);
typedef void tf_param_t(void *, int, unsigned int);
#define TP_SHOWCURSOR 0
#define TP_CURSORKEYS 1
#define TP_KEYPADAPP 2
#define TP_AUTOREPEAT 3
#define TP_SWITCHVT 4
#define TP_132COLS 5
#define TP_SETBELLPD 6
#define TP_SETBELLPD_PITCH(pd) ((pd) >> 16)
#define TP_SETBELLPD_DURATION(pd) ((pd) & 0xffff)
typedef void tf_respond_t(void *, const void *, size_t);
typedef struct {
tf_bell_t *tf_bell;
tf_cursor_t *tf_cursor;
tf_putchar_t *tf_putchar;
tf_fill_t *tf_fill;
tf_copy_t *tf_copy;
tf_param_t *tf_param;
tf_respond_t *tf_respond;
} teken_funcs_t;
typedef teken_char_t teken_scs_t(teken_t *, teken_char_t);
/*
* Terminal state.
*/
struct __teken {
const teken_funcs_t *t_funcs;
void *t_softc;
teken_state_t *t_nextstate;
unsigned int t_stateflags;
#define T_NUMSIZE 8
unsigned int t_nums[T_NUMSIZE];
unsigned int t_curnum;
teken_pos_t t_cursor;
teken_attr_t t_curattr;
teken_pos_t t_saved_cursor;
teken_attr_t t_saved_curattr;
teken_attr_t t_defattr;
teken_pos_t t_winsize;
/* For DECSTBM. */
teken_span_t t_scrollreg;
/* For DECOM. */
teken_span_t t_originreg;
#define T_NUMCOL 160
unsigned int t_tabstops[T_NUMCOL / (sizeof(unsigned int) * 8)];
unsigned int t_utf8_left;
teken_char_t t_utf8_partial;
unsigned int t_curscs;
teken_scs_t *t_saved_curscs;
teken_scs_t *t_scs[2];
};
/* Initialize teken structure. */
void teken_init(teken_t *, const teken_funcs_t *, void *);
/* Deliver character input. */
void teken_input(teken_t *, const void *, size_t);
/* Get/set teken attributes. */
const teken_pos_t *teken_get_cursor(teken_t *);
const teken_attr_t *teken_get_curattr(teken_t *);
const teken_attr_t *teken_get_defattr(teken_t *);
void teken_get_defattr_cons25(teken_t *, int *, int *);
const teken_pos_t *teken_get_winsize(teken_t *);
void teken_set_cursor(teken_t *, const teken_pos_t *);
void teken_set_curattr(teken_t *, const teken_attr_t *);
void teken_set_defattr(teken_t *, const teken_attr_t *);
void teken_set_winsize(teken_t *, const teken_pos_t *);
/* Legacy features. */
void teken_set_8bit(teken_t *);
void teken_set_cons25(teken_t *);
#endif /* !_TEKEN_H_ */
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