Re: ISO 2022 in terminals

[Tim Allen]

On Sat, Feb 05, 2011 at 12:31:36AM -0500, Keith Winstein wrote:
> On Fri, 4 Feb 2011, Tim Allen wrote:
> 
> >If you're willing to settle for merely not having to implement ISO 2022
> >yourself, rather than erasing it completely, have you tried luit?
> >
> >     http://invisible-island.net/luit/
> 
> Hmm, one issue with luit is that it doesn't interpret Save Cursor
> and Restore Cursor (ESC 7 and ESC 8), which are supposed to save and
> restore the character set shift state.
> 
> So adding luit to a "UTF-8 vt220 emulator" is not quite enough to
> look good in vttest.

That surprises me; as far as I know, xterm uses luit for its ISO 2022
implementation (at least in UTF-8 mode), and I'd be surprised if Thomas
released a version of xterm that didn't pass vttest.

I can't find a test in vttest labelled "Save and restore cursor", or
"ISO 2022", although I'm not terribly familiar with it. Can you point
out which tests fail with luit?