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Use UTF-8 line drawing characters on UTF-8 terminals. Fixes some stupid

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terminals (I'm looking at you, putty) which disable the vt100 ACS mode
switching sequences in UTF-8 mode.

Also on terminals without ACS at all, use ASCII equivalents where
obvious.
This commit is contained in:
Nicholas Marriott
2010-09-11 16:19:22 +00:00
parent 3696cce4ae
commit cb564bb427
6 changed files with 137 additions and 54 deletions
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97
tty-acs.c Normal file
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@ -0,0 +1,97 @@
/* $OpenBSD$ */
/*
* Copyright (c) 2010 Nicholas Marriott <nicm@users.sourceforge.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <stdlib.h>
#include "tmux.h"
int tty_acs_cmp(const void *, const void *);
/* Table mapping ACS entries to UTF-8. */
struct tty_acs_entry {
u_char key;
const char *string;
};
const struct tty_acs_entry tty_acs_table[] = {
{ '+', "\342\206\222" },
{ ',', "\342\206\220" },
{ '-', "\342\206\221" },
{ '.', "\342\206\223" },
{ '0', "\342\226\256" },
{ '`', "\342\227\206" },
{ 'a', "\342\226\222" },
{ 'f', "\302\260" },
{ 'g', "\302\261" },
{ 'h', "\342\226\222" },
{ 'i', "\342\230\203" },
{ 'j', "\342\224\230" },
{ 'k', "\342\224\220" },
{ 'l', "\342\224\214" },
{ 'm', "\342\224\224" },
{ 'n', "\342\224\274" },
{ 'o', "\342\216\272" },
{ 'p', "\342\216\273" },
{ 'q', "\342\224\200" },
{ 'r', "\342\216\274" },
{ 's', "\342\216\275" },
{ 't', "\342\224\234" },
{ 'u', "\342\224\244" },
{ 'v', "\342\224\264" },
{ 'w', "\342\224\254" },
{ 'x', "\342\224\202" },
{ 'y', "\342\211\244" },
{ 'z', "\342\211\245" },
{ '{', "\317\200" },
{ '|', "\342\211\240" },
{ '}', "\302\243" },
{ '~', "\302\267" }
};
int
tty_acs_cmp(const void *key, const void *value)
{
const struct tty_acs_entry *entry = value;
u_char ch;
ch = *(u_char *) key;
return (ch - entry->key);
}
/* Retrieve ACS to output as a string. */
const char *
tty_acs_get(struct tty *tty, u_char ch)
{
struct tty_acs_entry *entry;
/* If not a UTF-8 terminal, use the ACS set. */
if (!(tty->flags & TTY_UTF8)) {
if (tty->term->acs[ch][0] == '\0')
return (NULL);
return (&tty->term->acs[ch][0]);
}
/* Otherwise look up the UTF-8 translation. */
entry = bsearch(&ch,
tty_acs_table, nitems(tty_acs_table), sizeof tty_acs_table[0],
tty_acs_cmp);
if (entry == NULL)
return (NULL);
return (entry->string);
}