Neovim's virtualtext for call signatures

[blueyed]

We could investigate using Neovim's virtualtext support for call signatures (#890 (comment)), which could be added to the end of the current line.

(#890 (comment) reminded me of that)

[blayz3r]

Does the new Vim popup change anything? Syntax highlighting signatures maybe?

[blueyed]

Yeah, that would likely be even better to use. Neovim has it also (had it before, and Vim uses a different API again...).

[davidhalter]

I'm open to all those changes, but I'm still using old VIM, so feel free to change this.

[blueyed]

Started playing with using Neovim's floating windows.
Based on #652.

[blueyed]

Syntax highlighting signatures maybe?

It still uses the existing concealing (but in a separate window, not messing with the current buffer anymore, which might interfere with indenting etc).

[davidhalter]

We can do the same for VIM, using textprop, but we need at least patch 8.2.0286.

[blueyed]

Note: textprop is used for usages already: https://github.com/blueyed/jedi-vim/blob/6ca603ffdf989cfc7426485252a77529951ea47e/pythonx/jedi_vim.py#L658-L669