Kakoune: Add a <scope> to colorscheme command

[Delapouite]

Hi

When two clients are connected to the same session, changing the colorscheme in one of them will also impact the other.
I would suggest to add a <scope> flag , with global or window.

This way a user could keep the current behavior with global and have a different colorscheme per client by using window.

Use cases:
When in ide mode with a linter window, a grep window… only set bright color in the window which has focus, and turn the other one darker (with another color scheme).

[mawww]

That would be pretty hard to do on the colorscheme command, which is a small wrapper on top of the source command.

Faces are not scoped at all, they are global values. Changing them to be scoped would be a big change, I am not convinced its worth it. For your use case, rxvt-unicode provides just that, it can fade when not focused, so I dont think its a strong enough case to justify adding all that complexity inside Kakoune.

[lenormf]

Allowing two clients who code collaboratively to have a different colorscheme would be nice though.

[ul]

Another use case is to set custom face to cursor in insert mode. Doing it in ModeChange hook via set-face changes face of cursor in all client connected to session, even those which are still in normal mode.

[alesguzik]

Another use case is to be able to have a different cursor colour (or a whole theme) when in an insert mode. Right now if I change a cursor or a theme in a ModeChange hook, that change is applied globaly, which is very inconvenient. Also, why is there a need to have separate kind of variables that are not scoped?

[ul]

Amazing responsiveness! Thank you!

[alesguzik]

Thanks a lot! :tada: