Flickering behavior due to redrawing

[wookayin]

This is a fantastic plugin -- great idea, I like it pretty much.

One small thing that annoys me is that, whenever I scroll (e.g. press j many times) the buffer, all the buffer contents seem to be redrawn and because of this the vim screen flickers. Any solution to this?

I am using neovim 0.4.3 (linux), TERM=xterm-256color with termguicolors enabled.

[wookayin]

Additional information: Without floating windows (i.e. g:context_presenter = 'preview'), it works well without flickering.

[wellle]

@wookayin: Thanks! Yeah I wish we wouldn't need the hard redraw. There's a redraw issue in Neovim's floating window implementation, I opened an issue about it here: neovim/neovim#11597

As a workaround I added a hard redraw. If you want to try this plugin without that redraw, you try use this branch:
https://github.com/wellle/context.vim/compare/23-nvim-no-redraw

[wookayin]

Thanks @wellle for the information; it is super helpful. Temporarily disabling redraw (:mode) makes me feel more comfortable, and I would work around with this. Look forward to the upstream neovim issue being fixed.

[syphar]

I also switched to the version without redraw because of the flickering and performance.

(and yes, sometimes there are small rendering issues / remains of the closed context, but that annoys me less than the performance / flicker)

edit:
i was wrong, switched back again.

[exdeniz]

I have this issues on start nvim from tmux. Switching to 23-nvim-no-redraw and problem solved.

[wookayin]

Hey @wellle, would you want to make this feature merged to master but actually configurable by some g: variable?

[wellle]

Yes that sounds like a good idea 👍

[wellle]

@wookayin @sirupsen @lervag @jasonkena @exdeniz: I added a setting in #66 so you can disable the redraw on updated master now. Add this to your vimrc:

let g:context_nvim_no_redraw = 1

[lervag]

I still experience quite severe flickering, both with and without this setting.

[jasonkena]

@lervag @wellle Pretty sure it should be
let g:context_nvim_no_redraw = 1

[lervag]

Ah, yes. My brain was doing something else, sorry. With that, I can confirm there is no flickering, but I do see the artifacts. :\

[wellle]

@jasonkena: Thanks, fixed above 👍