TS-based concealing

[mrossinek]

This is mostly a question to query the status/plans for implementing Treesitter-powered concealing of characters (e.g. basic plain text markup). I am not sure how exactly the treesitter integration with Neovim works hence this is a discussion. Is something like this planned? Over at Neorg this would enable us to do some really cool and powerful stuff and fully ditch Vim's regex-based syntax definitions.

[stsewd]

I think this mostly depends on neovim implementing conceal on extmarks

[stsewd]

@mrossinek sorry I'm not aware if there is an open issue or PR related to this, but it's worth it asking on neovim

[mrossinek]

Thanks! For reference: neovim/neovim#15706

@theHamsta Thanks for the input! Am I understanding this right that for the time being you would "conceal" the markup by overwriting the actual char with something different? E.g. *text* could be overwritten by \ text\ (the backslashes are required for markdown to not remove the whitespace which I want to show here) whereby the markup itself is hidden but you would get additional whitespace instead?

[theHamsta]

yes, you can effectively display a different text than the one that's actually there. The only restriction is at the moment that you have to use the same number of characters.

[mrossinek]

Okay I see. I was actually thinking about this a little bit more this morning and found this hacky "solution"/workaround (whatever you may call that): neovim/neovim#15706 (comment)

[sisrfeng]

I can not read code without conceal now.
I use a lot of matchadd() to define conceal, which can override syntax highlighting.
But it is growing slower and slower