freebsd-dev/sys/teken/teken_subr_compat.h
Ed Schouten 68fdfe2926 Partially implement the mysterious cons25 \e[x escape sequence.
It seems the terminfo library on some systems (OS X, Linux) may emit the
sequence \e[x to reset to default attributes. Apart from using the
zero-command, this escape sequence allows many more operations, such as
setting ANSI colors. I don't see this used anywhere, so this should be
sufficient for now.

This deficiency was spotted by the Debian GNU/kFreeBSD. They have their
own patch, which is slightly flawed in my opinion. I don't know why they
never reported this issue to us.

MFC after:	1 week
2010-11-05 00:56:21 +00:00

127 lines
3.5 KiB
C

/*-
* 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.
*
* $FreeBSD$
*/
static void
teken_subr_cons25_set_cursor_type(teken_t *t, unsigned int type)
{
teken_funcs_param(t, TP_SHOWCURSOR, type != 1);
}
static const teken_color_t cons25_colors[8] = { TC_BLACK, TC_BLUE,
TC_GREEN, TC_CYAN, TC_RED, TC_MAGENTA, TC_BROWN, TC_WHITE };
static void
teken_subr_cons25_set_adapter_background(teken_t *t, unsigned int c)
{
t->t_defattr.ta_bgcolor = cons25_colors[c % 8];
t->t_curattr.ta_bgcolor = cons25_colors[c % 8];
}
static void
teken_subr_cons25_set_adapter_foreground(teken_t *t, unsigned int c)
{
t->t_defattr.ta_fgcolor = cons25_colors[c % 8];
t->t_curattr.ta_fgcolor = cons25_colors[c % 8];
if (c >= 8) {
t->t_defattr.ta_format |= TF_BOLD;
t->t_curattr.ta_format |= TF_BOLD;
} else {
t->t_defattr.ta_format &= ~TF_BOLD;
t->t_curattr.ta_format &= ~TF_BOLD;
}
}
static const teken_color_t cons25_revcolors[8] = { 0, 4, 2, 6, 1, 5, 3, 7 };
void
teken_get_defattr_cons25(teken_t *t, int *fg, int *bg)
{
*fg = cons25_revcolors[teken_256to8(t->t_defattr.ta_fgcolor)];
if (t->t_defattr.ta_format & TF_BOLD)
*fg += 8;
*bg = cons25_revcolors[teken_256to8(t->t_defattr.ta_bgcolor)];
}
static void
teken_subr_cons25_switch_virtual_terminal(teken_t *t, unsigned int vt)
{
teken_funcs_param(t, TP_SWITCHVT, vt);
}
static void
teken_subr_cons25_set_bell_pitch_duration(teken_t *t, unsigned int pitch,
unsigned int duration)
{
teken_funcs_param(t, TP_SETBELLPD, (pitch << 16) |
(duration & 0xffff));
}
static void
teken_subr_cons25_set_graphic_rendition(teken_t *t, unsigned int cmd,
unsigned int param __unused)
{
switch (cmd) {
case 0: /* Reset. */
t->t_curattr = t->t_defattr;
break;
default:
teken_printf("unsupported attribute %u\n", cmd);
}
}
static void
teken_subr_cons25_set_terminal_mode(teken_t *t, unsigned int mode)
{
switch (mode) {
case 0: /* Switch terminal to xterm. */
t->t_stateflags &= ~TS_CONS25;
break;
case 1: /* Switch terminal to cons25. */
t->t_stateflags |= TS_CONS25;
break;
}
}
#if 0
static void
teken_subr_vt52_decid(teken_t *t)
{
const char response[] = "\x1B/Z";
teken_funcs_respond(t, response, sizeof response - 1);
}
#endif