544 lines
13 KiB
C
544 lines
13 KiB
C
/*-
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* Copyright (c) 2008-2009 Ed Schouten <ed@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/cdefs.h>
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#if defined(__FreeBSD__) && defined(_KERNEL)
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#include <sys/param.h>
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#include <sys/lock.h>
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#include <sys/systm.h>
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#define teken_assert(x) MPASS(x)
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#define teken_printf(x,...)
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#else /* !(__FreeBSD__ && _KERNEL) */
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#include <sys/types.h>
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#include <assert.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#define teken_assert(x) assert(x)
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#define teken_printf(x,...) do { \
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if (df != NULL) \
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fprintf(df, x, ## __VA_ARGS__); \
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} while (0)
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/* debug messages */
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static FILE *df;
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#endif /* __FreeBSD__ && _KERNEL */
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/* Private flags for t_stateflags. */
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#define TS_FIRSTDIGIT 0x0001 /* First numeric digit in escape sequence. */
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#define TS_INSERT 0x0002 /* Insert mode. */
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#define TS_AUTOWRAP 0x0004 /* Autowrap. */
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#define TS_ORIGIN 0x0008 /* Origin mode. */
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#define TS_WRAPPED 0x0010 /* Next character should be printed on col 0. */
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#define TS_8BIT 0x0020 /* UTF-8 disabled. */
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#define TS_CONS25 0x0040 /* cons25 emulation. */
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#define TS_INSTRING 0x0080 /* Inside string. */
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#define TS_CURSORKEYS 0x0100 /* Cursor keys mode. */
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/* Character that blanks a cell. */
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#define BLANK ' '
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#include "teken.h"
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#include "teken_wcwidth.h"
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#include "teken_scs.h"
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static teken_state_t teken_state_init;
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/*
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* Wrappers for hooks.
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*/
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static inline void
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teken_funcs_bell(teken_t *t)
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{
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t->t_funcs->tf_bell(t->t_softc);
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}
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static inline void
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teken_funcs_cursor(teken_t *t)
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{
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teken_assert(t->t_cursor.tp_row < t->t_winsize.tp_row);
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teken_assert(t->t_cursor.tp_col < t->t_winsize.tp_col);
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t->t_funcs->tf_cursor(t->t_softc, &t->t_cursor);
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}
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static inline void
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teken_funcs_putchar(teken_t *t, const teken_pos_t *p, teken_char_t c,
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const teken_attr_t *a)
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{
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teken_assert(p->tp_row < t->t_winsize.tp_row);
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teken_assert(p->tp_col < t->t_winsize.tp_col);
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t->t_funcs->tf_putchar(t->t_softc, p, c, a);
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}
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static inline void
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teken_funcs_fill(teken_t *t, const teken_rect_t *r,
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const teken_char_t c, const teken_attr_t *a)
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{
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teken_assert(r->tr_end.tp_row > r->tr_begin.tp_row);
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teken_assert(r->tr_end.tp_row <= t->t_winsize.tp_row);
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teken_assert(r->tr_end.tp_col > r->tr_begin.tp_col);
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teken_assert(r->tr_end.tp_col <= t->t_winsize.tp_col);
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t->t_funcs->tf_fill(t->t_softc, r, c, a);
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}
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static inline void
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teken_funcs_copy(teken_t *t, const teken_rect_t *r, const teken_pos_t *p)
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{
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teken_assert(r->tr_end.tp_row > r->tr_begin.tp_row);
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teken_assert(r->tr_end.tp_row <= t->t_winsize.tp_row);
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teken_assert(r->tr_end.tp_col > r->tr_begin.tp_col);
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teken_assert(r->tr_end.tp_col <= t->t_winsize.tp_col);
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teken_assert(p->tp_row + (r->tr_end.tp_row - r->tr_begin.tp_row) <= t->t_winsize.tp_row);
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teken_assert(p->tp_col + (r->tr_end.tp_col - r->tr_begin.tp_col) <= t->t_winsize.tp_col);
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t->t_funcs->tf_copy(t->t_softc, r, p);
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}
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static inline void
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teken_funcs_param(teken_t *t, int cmd, unsigned int value)
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{
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t->t_funcs->tf_param(t->t_softc, cmd, value);
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}
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static inline void
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teken_funcs_respond(teken_t *t, const void *buf, size_t len)
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{
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t->t_funcs->tf_respond(t->t_softc, buf, len);
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}
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#include "teken_subr.h"
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#include "teken_subr_compat.h"
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/*
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* Programming interface.
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*/
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void
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teken_init(teken_t *t, const teken_funcs_t *tf, void *softc)
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{
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teken_pos_t tp = { .tp_row = 24, .tp_col = 80 };
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#if !(defined(__FreeBSD__) && defined(_KERNEL))
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df = fopen("teken.log", "w");
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if (df != NULL)
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setvbuf(df, NULL, _IOLBF, BUFSIZ);
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#endif /* !(__FreeBSD__ && _KERNEL) */
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t->t_funcs = tf;
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t->t_softc = softc;
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t->t_nextstate = teken_state_init;
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t->t_stateflags = 0;
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t->t_utf8_left = 0;
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t->t_defattr.ta_format = 0;
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t->t_defattr.ta_fgcolor = TC_WHITE;
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t->t_defattr.ta_bgcolor = TC_BLACK;
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teken_subr_do_reset(t);
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teken_set_winsize(t, &tp);
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}
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static void
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teken_input_char(teken_t *t, teken_char_t c)
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{
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/*
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* There is no support for DCS and OSC. Just discard strings
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* until we receive characters that may indicate string
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* termination.
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*/
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if (t->t_stateflags & TS_INSTRING) {
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switch (c) {
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case '\x1B':
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t->t_stateflags &= ~TS_INSTRING;
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break;
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case '\a':
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t->t_stateflags &= ~TS_INSTRING;
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return;
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default:
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return;
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}
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}
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switch (c) {
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case '\0':
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break;
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case '\a':
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teken_subr_bell(t);
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break;
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case '\b':
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teken_subr_backspace(t);
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break;
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case '\n':
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case '\x0B':
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teken_subr_newline(t);
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break;
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case '\x0C':
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teken_subr_newpage(t);
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break;
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case '\x0E':
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if (t->t_stateflags & TS_CONS25)
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t->t_nextstate(t, c);
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else
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t->t_curscs = 1;
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break;
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case '\x0F':
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if (t->t_stateflags & TS_CONS25)
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t->t_nextstate(t, c);
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else
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t->t_curscs = 0;
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break;
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case '\r':
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teken_subr_carriage_return(t);
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break;
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case '\t':
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teken_subr_horizontal_tab(t);
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break;
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default:
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t->t_nextstate(t, c);
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break;
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}
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/* Post-processing assertions. */
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teken_assert(t->t_cursor.tp_row >= t->t_originreg.ts_begin);
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teken_assert(t->t_cursor.tp_row < t->t_originreg.ts_end);
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teken_assert(t->t_cursor.tp_row < t->t_winsize.tp_row);
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teken_assert(t->t_cursor.tp_col < t->t_winsize.tp_col);
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teken_assert(t->t_saved_cursor.tp_row < t->t_winsize.tp_row);
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teken_assert(t->t_saved_cursor.tp_col < t->t_winsize.tp_col);
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teken_assert(t->t_scrollreg.ts_end <= t->t_winsize.tp_row);
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teken_assert(t->t_scrollreg.ts_begin < t->t_scrollreg.ts_end);
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/* Origin region has to be window size or the same as scrollreg. */
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teken_assert((t->t_originreg.ts_begin == t->t_scrollreg.ts_begin &&
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t->t_originreg.ts_end == t->t_scrollreg.ts_end) ||
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(t->t_originreg.ts_begin == 0 &&
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t->t_originreg.ts_end == t->t_winsize.tp_row));
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}
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static void
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teken_input_byte(teken_t *t, unsigned char c)
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{
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/*
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* UTF-8 handling.
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*/
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if ((c & 0x80) == 0x00 || t->t_stateflags & TS_8BIT) {
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/* One-byte sequence. */
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t->t_utf8_left = 0;
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teken_input_char(t, c);
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} else if ((c & 0xe0) == 0xc0) {
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/* Two-byte sequence. */
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t->t_utf8_left = 1;
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t->t_utf8_partial = c & 0x1f;
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} else if ((c & 0xf0) == 0xe0) {
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/* Three-byte sequence. */
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t->t_utf8_left = 2;
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t->t_utf8_partial = c & 0x0f;
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} else if ((c & 0xf8) == 0xf0) {
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/* Four-byte sequence. */
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t->t_utf8_left = 3;
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t->t_utf8_partial = c & 0x07;
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} else if ((c & 0xc0) == 0x80) {
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if (t->t_utf8_left == 0)
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return;
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t->t_utf8_left--;
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t->t_utf8_partial = (t->t_utf8_partial << 6) | (c & 0x3f);
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if (t->t_utf8_left == 0) {
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teken_printf("Got UTF-8 char %x\n", t->t_utf8_partial);
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teken_input_char(t, t->t_utf8_partial);
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}
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}
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}
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void
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teken_input(teken_t *t, const void *buf, size_t len)
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{
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const char *c = buf;
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while (len-- > 0)
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teken_input_byte(t, *c++);
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}
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const teken_pos_t *
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teken_get_cursor(teken_t *t)
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{
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return (&t->t_cursor);
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}
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void
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teken_set_cursor(teken_t *t, const teken_pos_t *p)
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{
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/* XXX: bounds checking with originreg! */
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teken_assert(p->tp_row < t->t_winsize.tp_row);
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teken_assert(p->tp_col < t->t_winsize.tp_col);
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t->t_cursor = *p;
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}
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const teken_attr_t *
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teken_get_curattr(teken_t *t)
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{
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return (&t->t_curattr);
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}
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void
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teken_set_curattr(teken_t *t, const teken_attr_t *a)
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{
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t->t_curattr = *a;
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}
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const teken_attr_t *
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teken_get_defattr(teken_t *t)
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{
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return (&t->t_defattr);
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}
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void
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teken_set_defattr(teken_t *t, const teken_attr_t *a)
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{
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t->t_curattr = t->t_saved_curattr = t->t_defattr = *a;
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}
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const teken_pos_t *
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teken_get_winsize(teken_t *t)
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{
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return (&t->t_winsize);
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}
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void
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teken_set_winsize(teken_t *t, const teken_pos_t *p)
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{
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t->t_winsize = *p;
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teken_subr_do_reset(t);
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}
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void
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teken_set_8bit(teken_t *t)
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{
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t->t_stateflags |= TS_8BIT;
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}
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void
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teken_set_cons25(teken_t *t)
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{
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t->t_stateflags |= TS_CONS25;
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}
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/*
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* State machine.
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*/
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static void
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teken_state_switch(teken_t *t, teken_state_t *s)
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{
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t->t_nextstate = s;
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t->t_curnum = 0;
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t->t_stateflags |= TS_FIRSTDIGIT;
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}
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static int
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teken_state_numbers(teken_t *t, teken_char_t c)
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{
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teken_assert(t->t_curnum < T_NUMSIZE);
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if (c >= '0' && c <= '9') {
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/*
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* Don't do math with the default value of 1 when a
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* custom number is inserted.
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*/
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if (t->t_stateflags & TS_FIRSTDIGIT) {
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t->t_stateflags &= ~TS_FIRSTDIGIT;
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t->t_nums[t->t_curnum] = 0;
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} else {
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t->t_nums[t->t_curnum] *= 10;
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}
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t->t_nums[t->t_curnum] += c - '0';
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return (1);
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} else if (c == ';') {
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if (t->t_stateflags & TS_FIRSTDIGIT)
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t->t_nums[t->t_curnum] = 0;
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/* Only allow a limited set of arguments. */
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if (++t->t_curnum == T_NUMSIZE) {
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teken_state_switch(t, teken_state_init);
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return (1);
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}
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t->t_stateflags |= TS_FIRSTDIGIT;
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return (1);
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} else {
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if (t->t_stateflags & TS_FIRSTDIGIT && t->t_curnum > 0) {
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/* Finish off the last empty argument. */
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t->t_nums[t->t_curnum] = 0;
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t->t_curnum++;
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} else if ((t->t_stateflags & TS_FIRSTDIGIT) == 0) {
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/* Also count the last argument. */
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t->t_curnum++;
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}
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}
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return (0);
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}
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teken_color_t
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teken_256to8(teken_color_t c)
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{
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unsigned int r, g, b;
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if (c < 16) {
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/* Traditional color indices. */
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return (c % 8);
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} else if (c >= 244) {
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/* Upper grayscale colors. */
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return (TC_WHITE);
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} else if (c >= 232) {
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/* Lower grayscale colors. */
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return (TC_BLACK);
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}
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/* Convert to RGB. */
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c -= 16;
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b = c % 6;
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g = (c / 6) % 6;
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r = c / 36;
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if (r < g) {
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/* Possibly green. */
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if (g < b)
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return (TC_BLUE);
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else if (g > b)
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return (TC_GREEN);
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else
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return (TC_CYAN);
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} else if (r > g) {
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/* Possibly red. */
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if (r < b)
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return (TC_BLUE);
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else if (r > b)
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return (TC_RED);
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else
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return (TC_MAGENTA);
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} else {
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/* Possibly brown. */
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if (g < b)
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return (TC_BLUE);
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else if (g > b)
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return (TC_BROWN);
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else if (r < 3)
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return (TC_BLACK);
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else
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return (TC_WHITE);
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}
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}
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static const char * const special_strings_cons25[] = {
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[TKEY_UP] = "\x1B[A", [TKEY_DOWN] = "\x1B[B",
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[TKEY_LEFT] = "\x1B[D", [TKEY_RIGHT] = "\x1B[C",
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[TKEY_HOME] = "\x1B[H", [TKEY_END] = "\x1B[F",
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[TKEY_INSERT] = "\x1B[L", [TKEY_DELETE] = "\x7F",
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[TKEY_PAGE_UP] = "\x1B[I", [TKEY_PAGE_DOWN] = "\x1B[G",
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[TKEY_F1] = "\x1B[M", [TKEY_F2] = "\x1B[N",
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[TKEY_F3] = "\x1B[O", [TKEY_F4] = "\x1B[P",
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[TKEY_F5] = "\x1B[Q", [TKEY_F6] = "\x1B[R",
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[TKEY_F7] = "\x1B[S", [TKEY_F8] = "\x1B[T",
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[TKEY_F9] = "\x1B[U", [TKEY_F10] = "\x1B[V",
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[TKEY_F11] = "\x1B[W", [TKEY_F12] = "\x1B[X",
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};
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static const char * const special_strings_ckeys[] = {
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|
[TKEY_UP] = "\x1BOA", [TKEY_DOWN] = "\x1BOB",
|
|
[TKEY_LEFT] = "\x1BOD", [TKEY_RIGHT] = "\x1BOC",
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|
|
|
[TKEY_HOME] = "\x1BOH", [TKEY_END] = "\x1BOF",
|
|
};
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|
|
|
static const char * const special_strings_normal[] = {
|
|
[TKEY_UP] = "\x1B[A", [TKEY_DOWN] = "\x1B[B",
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|
[TKEY_LEFT] = "\x1B[D", [TKEY_RIGHT] = "\x1B[C",
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|
|
|
[TKEY_HOME] = "\x1B[H", [TKEY_END] = "\x1B[F",
|
|
[TKEY_INSERT] = "\x1B[2~", [TKEY_DELETE] = "\x1B[3~",
|
|
[TKEY_PAGE_UP] = "\x1B[5~", [TKEY_PAGE_DOWN] = "\x1B[6~",
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|
|
|
[TKEY_F1] = "\x1BOP", [TKEY_F2] = "\x1BOQ",
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|
[TKEY_F3] = "\x1BOR", [TKEY_F4] = "\x1BOS",
|
|
[TKEY_F5] = "\x1B[15~", [TKEY_F6] = "\x1B[17~",
|
|
[TKEY_F7] = "\x1B[18~", [TKEY_F8] = "\x1B[19~",
|
|
[TKEY_F9] = "\x1B[20~", [TKEY_F10] = "\x1B[21~",
|
|
[TKEY_F11] = "\x1B[23~", [TKEY_F12] = "\x1B[24~",
|
|
};
|
|
|
|
const char *
|
|
teken_get_sequence(teken_t *t, unsigned int k)
|
|
{
|
|
|
|
/* Cons25 mode. */
|
|
if (t->t_stateflags & TS_CONS25 &&
|
|
k < sizeof special_strings_cons25 / sizeof(char *))
|
|
return (special_strings_cons25[k]);
|
|
|
|
/* Cursor keys mode. */
|
|
if (t->t_stateflags & TS_CURSORKEYS &&
|
|
k < sizeof special_strings_ckeys / sizeof(char *))
|
|
return (special_strings_ckeys[k]);
|
|
|
|
/* Default xterm sequences. */
|
|
if (k < sizeof special_strings_normal / sizeof(char *))
|
|
return (special_strings_normal[k]);
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
#include "teken_state.h"
|