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Use the xenl terminfo flag to detect early-wrap terminals like the FreeBSD

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console. Many thanks for a very informative email from Christian Weisgerber.
This commit is contained in:
Nicholas Marriott
2009-04-23 21:09:17 +00:00
parent a91ecf44fa
commit 5fbdca890a
4 changed files with 24 additions and 26 deletions
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36
tty-term.c
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@ -1,4 +1,4 @@
/* $Id: tty-term.c,v 1.17 2009-03-07 10:29:06 nicm Exp $ */
/* $Id: tty-term.c,v 1.18 2009-04-23 21:09:17 nicm Exp $ */
/*
* Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
@ -107,6 +107,7 @@ struct tty_term_code_entry tty_term_codes[NTTYCODE] = {
{ TTYC_SMKX, TTYCODE_STRING, "smkx" },
{ TTYC_SMSO, TTYCODE_STRING, "smso" },
{ TTYC_SMUL, TTYCODE_STRING, "smul" },
{ TTYC_XENL, TTYCODE_FLAG, "xenl" },
};
char *
@ -156,26 +157,6 @@ tty_term_quirks(struct tty_term *term)
term->codes[TTYC_ICH1].value.string = xstrdup("\033[@");
}
}
#ifdef __FreeBSD__
if (strncmp(term->name, "cons", 4) == 0) {
/*
* FreeBSD's console wraps lines at $COLUMNS - 1 rather than
* $COLUMNS (the cursor can never be beyond $COLUMNS - 1) and
* does not appear to support changing this behaviour, or any
* of the obvious possibilities (turning off right margin
* wrapping, insert mode).
*
* This is irritating, most notably because it is impossible to
* write to the very bottom-right of the screen without
* scrolling.
*
* Flag the terminal here and apply some workarounds in other
* places to do the best possible.
*/
term->flags |= TERM_EARLYWRAP;
}
#endif
}
struct tty_term *
@ -323,6 +304,19 @@ tty_term_find(char *name, int fd, char **cause)
if (strstr(name, "88col") != NULL) /* XXX HACK */
term->flags |= TERM_88COLOURS;
/*
* Terminals without xenl (eat newline glitch) wrap at at $COLUMNS - 1
* rather than $COLUMNS (the cursor can never be beyond $COLUMNS - 1).
*
* This is irritating, most notably because it is impossible to write
* to the very bottom-right of the screen without scrolling.
*
* Flag the terminal here and apply some workarounds in other places to
* do the best possible.
*/
if (!tty_term_flag(term, TTYC_XENL))
term->flags |= TERM_EARLYWRAP;
return (term);
error: