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freebsd-nq/sys/teken/teken.h
Ed Schouten a6c26592f1 Extend libteken to support CJK fullwidth characters. 
Introduce a new formatting bit (TF_CJK_RIGHT) that is set when putting a
cell that is the right part of a CJK fullwidth character. This will
allow drivers like vt(9) to support fullwidth characters properly.

emaste@ has a patch to extend vt(9)'s font handling to increase the
number of Unicode -> glyph maps from 2 ({normal,bold)} to 4
({normal,bold} x {left,right}). This will need to use this formatting
bit to determine whether to draw the left or right glyph.

Reviewed by:	emaste
2013-12-20 21:31:50 +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_
#include <sys/types.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 /* Bold character. */
#define TF_UNDERLINE 0x02 /* Underline character. */
#define TF_BLINK 0x04 /* Blinking character. */
#define TF_REVERSE 0x08 /* Reverse rendered character. */
#define TF_CJK_RIGHT 0x10 /* Right-hand side of CJK character. */
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_KEYPADAPP 1
#define TP_AUTOREPEAT 2
#define TP_SWITCHVT 3
#define TP_132COLS 4
#define TP_SETBELLPD 5
#define TP_SETBELLPD_PITCH(pd) ((pd) >> 16)
#define TP_SETBELLPD_DURATION(pd) ((pd) & 0xffff)
#define TP_MOUSE 6
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 *);
void teken_set_winsize_noreset(teken_t *, const teken_pos_t *);
/* Key input escape sequences. */
#define TKEY_UP 0x00
#define TKEY_DOWN 0x01
#define TKEY_LEFT 0x02
#define TKEY_RIGHT 0x03
#define TKEY_HOME 0x04
#define TKEY_END 0x05
#define TKEY_INSERT 0x06
#define TKEY_DELETE 0x07
#define TKEY_PAGE_UP 0x08
#define TKEY_PAGE_DOWN 0x09
#define TKEY_F1 0x0a
#define TKEY_F2 0x0b
#define TKEY_F3 0x0c
#define TKEY_F4 0x0d
#define TKEY_F5 0x0e
#define TKEY_F6 0x0f
#define TKEY_F7 0x10
#define TKEY_F8 0x11
#define TKEY_F9 0x12
#define TKEY_F10 0x13
#define TKEY_F11 0x14
#define TKEY_F12 0x15
const char *teken_get_sequence(teken_t *, unsigned int);
/* Legacy features. */
void teken_set_8bit(teken_t *);
void teken_set_cons25(teken_t *);
/* Color conversion. */
teken_color_t teken_256to8(teken_color_t);
#endif /* !_TEKEN_H_ */
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