Manually run OSC11 query

[Baspar]

Problem

background is currently determined at neovim start time, using a OSC11? query.
When changing background color/theme, it would be helpful to have a way to tell neovim to re-query the terminal for a background color.

Vim has a way to do so by executing :call echoraw(&t_RB) (Effectively printing the OSC11? query to the TTY)

Expected behavior

Have a way to re-evaluate the background using OSC11?

[zeertzjq]

Does this work?

:call chansend(v:stderr, "\x1b]11;?\x07")

[Baspar]

Nope, it keeps the background value unchanged

[gpanders]

Nope, it keeps the background value unchanged

IIRC the OSC 11 response is only parsed on startup, so if the response is received later it will not update 'background' automatically.

You would have to parse the response from the terminal yourself, or maybe we could update the code in input.c to always handle the OSC 11 response.

Or option 3 is to introduce a higher level abstraction (a function/option/autocommand) that handles the whole process of issuing OSC 11 -> reading the response -> updating 'background' that could be triggered by a user at any time.

[justinmk]

Or option 3 is to introduce a higher level abstraction (a function/option/autocommand) that handles the whole process of issuing OSC 11 -> reading the response -> updating 'background' that could be triggered by a user at any time.

TermResponse was implemented #25856