feat: add LaTex rendering for inline equations

[nolbap]

Working over the implementation of the latex-rendering branch, I added LaTex rendering using the image.nvim plugin.

Added the Neorg command render-latex which upon being called it gets all the inline math snippets using treesitter, parses them into a temp LaTex file, and compiles the snippet into a png, it then renders the png, concealing the equation if conceal option is true (which it is by default) or it renders them in a virtual line under the inline equation. I tested these changes and everything seems to work fine :)

A preview of the module in action!

finalshowcase.mp4

Note: The concealer uses the nvim-extmark option virt-text-pos = "inline" which only works for Neovim 0.10.0+, which I added an assertion for :)

P.S. Its my first pull request ever so if anything is wrong let me know 😅

[max397574]

just a few points

1. just starting off this discussion: should this be a core module
   • gives errors or warnings to users which aren't on nightly
   • has an external dependency
2. we have to look into the performance of this. Haven't checked but:
   • Check if it's done only for the visible area of the buffer or
   • Don't clear on every cursor movement

I haven't really looked into the code yet. So perhaps some of those things are already ok

[vhyrro]

tysm for this! I won't likely have time today but I should be able to review this tomorrow :)

[vhyrro]

Instead of creating a global Image variable here I would rather you do the same thing like in core.integrations.image - the module.private contains the image variable and a pcall is executed in the load function. The rest looks good to me!

[nolbap]

Sorry for the wait, college has kept me really busy these past few weeks, but I finally got some time and I pushed the commit :)

[vhyrro]

All good, thanks for all the work!

[pysan3]

Hi, nice addition @nolbap but it would be nice if you could take a look at this action and fix where there are errors.

https://github.com/nvim-neorg/neorg/actions/runs/6906276341/job/18790965878

[italovieira]

Is this already functional?
I think it's missing in the documentation/wiki, how can I use configure Neorg to render Latex like this?

[max397574]

yes it should be
haven't set it up myself yet
ig you can just load the modules

[Vaisakhkm2625]

:*) Thanks @nolbap for your hard work....

i actually have been working on this (https://github.com/Vaisakhkm2625/hologram-math-preview.nvim) few months ago, but life get the way and was really paining me that i didn't able to move forward with this and hoping for someone to do it...

but based on what i have done, i like to give few suggestion here... using tectonic instead of normal textlive-latex package give much nicer experience, and it's a single library which will automatically manage dependencies by itself, and actually made for applications like embedded previewing.. and instread of dvipng, we can use pdftocairo -transp -singlefile " .. document_name .. ".pdf -png " .. png_result to convert to image, which i find much more faster....

i know it's late as you already done all the work, but if you are looking for any improvement, you can take a look at this...