Compatibility with luochen1990/rainbow

[gvdeynde]

It seems the syntax file in vimtex perturbs the rainbow parenthesis plugin https://github.com/luochen1990/rainbow.

Opening a tex file, I don't see any rainbow parenthesis. If I then manually set the filetype to plaintex, the rainbow parenthesis plugin works and the colored parentheses appear...

I've posted this also at the rainbow plugin (luochen1990/rainbow#142), but no response there...

Any tips welcome....

Thanks.

[lervag]

Strange. It works for me. But in a minimal example, it does not work quite as expected. :RainbowToggle does enable the rainbows, though. Does that work for you as an alternative to changing filetype?

[lervag]

Ok, sorry, I've created a minimal example that works just as expected, see here:

set nocompatible
let &runtimepath = '~/.vim/bundle/rainbow,' . &runtimepath
let &runtimepath = '~/.vim/bundle/vimtex,' . &runtimepath
let &runtimepath .= ',~/.vim/bundle/vimtex/after'
filetype plugin indent on
syntax enable

nnoremap q :qall!<cr>

let g:rainbow_active = 1

and

\documentclass{minimal}
\begin{document}

Hello World! (((()))) {{{{{}}}}}

\end{document}

With nvim -u test.vim test.tex things work as expected, as can be seen in the
following screenshot.

[gvdeynde]

Euhmmm. Can you try this, a bit less minimal, example?
And I would have expected the curly braces also to be 'rainbowed', no?

\documentclass{minimal}
\begin{document}

Hello World! (((()))) {{{{{}}}}}

\section*{Test}

Hello World! ((())) {{{}}}

\end{document}

I get this as a result:

[lervag]

Ah, I see. This is reproducible, but it is not a vimtex issue. Instead, this is caused by the syntax plugin which comes with Vim/neovim. The problem is due to the tex syntax that specifically matches parantheses inside sections and curly braces in general.

Not sure if it is possible to do anything about it.

[gvdeynde]

FYI: in my minimal example, if I set the filetype manually to plaintex, it works... for both () and {} in both lines 4 and 8...

[lervag]

Yes, but plaintex is a different filetype which has a much simpler syntax specification. Feel free to use it if you find rainbow parantheses more important than advanced syntax highlighting.

For more info, see :edit $VIMRUNTIME/syntax/plaintex.vim and :edit $VIMRUNTIME/syntax/tex.vim.

[gvdeynde]

Thanks for looking in to this so quickly anyway.

I'll go for the advanced syntax highlighting any time of day. The rainbow parentheses are sugar on the cake when I have a large formula with a lot of fractions combined with sub/superscripts... So when debugging the latter, I'll switch syntax manually....

Thanks again (and <applause> in general for vimtex </applause> )

[lervag]

Thanks for the applause :)

Note, I think your issue should be followed up by luochen. I've added an update on that issue.