zellij injects additional keyboard input to textual-based TUIs

[isd-project]

2. Issues with the Zellij UI / behavior / crash

Issue description

Zellij seems to generate additional keyboard input when textual based TUI applications focus an input widget on startup. It seems like ansi escape codes aren't correctly escaped.

Originally reported in: isd-project/isd#34

I am also posting this issue to the TUI framework, since I am not quite sure what the underlying issue is:

• Terminal multiplexer zellij injects random input to input widget on auto-focus Textualize/textual#5500

Minimal reproduction

Run uvx --python=3.12 --from git+https://github.com/isd-project/isd isd --cache_input=false to run a textual-based Python application. You will see that it auto-fills the input with [2026;2$y, which is not the case if the application is run without zellij.

Please let me know how I can help you to investigate this issue! 🙏

Thanks!

[isd-project]

The textual author has determined that zellij is missing a ? in the generation of the escape code.

See Textualize/textual#5500 for details.

Ok, it looks like Zellij is generating an invalid sequence. I can see from the first line that it is missing a question mark. It should be sending "\x1b[?2026;2$y"

Suggest you report it upstream, looks like an easy fix. The spec is here:

https://gist.github.com/christianparpart/d8a62cc1ab659194337d73e399004036#feature-detection

[imsnif]

Incidentally, the Textualize maintainers also kindly fixed this issue already: #3884

It should be released in the next version.

[isd-project]

Ups, then I have re-discovered the bug a bit too fast. 😅
Thanks for the update!