c13fa86fe3
These strings often contain things like: - Window titles. - Extended key map functionality. - Color palette switching. We could look at these features in the future (if people consider them to be important enough), but we'd better discard them now. This fixes some artifacts people reported when using TERM=xterm. Reported by: des@, Paul B. Mahol
483 lines
11 KiB
C
483 lines
11 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 <inttypes.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 0x01 /* First numeric digit in escape sequence. */
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#define TS_INSERT 0x02 /* Insert mode. */
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#define TS_AUTOWRAP 0x04 /* Autowrap. */
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#define TS_ORIGIN 0x08 /* Origin mode. */
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#define TS_WRAPPED 0x10 /* Next character should be printed on col 0. */
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#define TS_8BIT 0x20 /* UTF-8 disabled. */
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#define TS_CONS25 0x40 /* cons25 emulation. */
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#define TS_INSTRING 0x80 /* Inside string. */
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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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#include "teken_state.h"
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