Re: [PATCH] [gdb/tui] Add set tui hide-last-column on/off/auto

[Tom Tromey <tom@tromey.com>]

>>>>> "Tom" == Tom de Vries via Gdb-patches <gdb-patches@sourceware.org> writes:

Tom> But it's different when we define TERM=ansi, because of the implications for
Tom> the xenl flag:
Tom> ...
Tom> $ TERM=xterm tput xenl; echo $?
Tom> 0
Tom> $ TERM=ansi tput xenl; echo $?
Tom> 1
Tom> ...
Tom> which stands for "eat newline glitch".

I wonder if it's possible to also set TERMCAP to deal with this.

Tom> At this point, we could just disregard this as a user problem, but there is an
Tom> interest in having this TERM=ansi working somewhat.  This is because the
Tom> native TERM for our tuiterm terminal emulator is ansi, and it's worthwhile:
Tom> - being able to compare behaviour in the tuiterm and an actual terminal
Tom>   emulator like konsole or gnome-terminal (which typically will have the
Tom>   glitch), as well as
Tom> - playing around with the TUI and explore new scenarios with TUI running in a
Tom>   mode as close as possible to tuiterm to increase the likeliness that the
Tom>   scenario can be reproduced in the tuiterm.

Another option would be to change the test suite to also have the glitch
and to set 'TERM=xterm' or something.

Tom> So, we expose the fix at user level using a "set tui hide-last-column
Tom> on/off/auto", with auto behaving like this:
Tom> ...
Tom> $ TERM=xterm gdb -q  -ex "show tui hide-last-column"
Tom> TUI last column hiding is "auto; currently off".
Tom> $ TERM=ansi gdb -q -ex "show tui hide-last-column"
Tom> TUI last column hiding is "auto; currently on".
Tom> ...
Tom> and use "set tui hide-last-column off" in the testsuite.

So IIUC, the idea here is that sometimes you may want to try out
TERM=ansi interactively, even though your actual terminal is different.
This of course causes problems because TERM doesn't match the
capabilities of the actual terminal.  So then this setting works around
one bug that's exposed?

If that's accurate, and you still want this setting, then perhaps it
should be under "maint".  Ordinary users should not be doing this kind
of thing and, for all we know, there are other incompatibilities that we
just haven't stumbled across yet.

Tom