Expanding ToC syntax for sections

[yongrenjie]

Is your feature request related to a problem? Please describe it.

In the ToC, chapter/section labels like chap:foo or sec:bar get special syntax highlighting as defined in autoload/vimtex/toc.vim

vimtex/autoload/vimtex/toc.vim

Lines 373 to 376 in e429bb6

	syntax match VimtexTocLabelsSecs /\v(chap|sec):.*$/ contained
	syntax match VimtexTocLabelsEq /eq:.*$/ contained
	syntax match VimtexTocLabelsFig /fig:.*$/ contained
	syntax match VimtexTocLabelsTab /tab:.*$/ contained

It might be nice to be able to configure this, e.g. for subsections subsec:baz, or or if someone wanted to use a different abbreviation, say \label{chpt:foo} (I'm not sure whether there's an 'official' guide on what abbreviations to use, or whether it's just a convention 😄). Basically, something like g:vimtex_toc_todo_labels but for sections instead of todos. (probably simpler than the todo labels, actually)

Right now subsections especially tend to get a little bit messed up because the syntax matches the second half of subsec:baz, e.g.

[lervag]

It might be nice to be able to configure this, e.g. for subsections subsec:baz, or or if someone wanted to use a different abbreviation, say \label{chpt:foo}

Thanks, I agree that subsec: should also be highlighted and that should be fixed now. But I'm not 100% sure if we need any additional configuration possibilities here. If you want to, you can add your own rules, e.g. like this:

augroup vimtex_toc
  autocmd!
  autocmd User VimtexEventTocCreated call MyTocSyntax()
augroup END

function! MyTocSyntax() abort
  syntax match VimtexTocLabelsSecs  /chpt:.*$/ contained
endfunction

(I'm not sure whether there's an 'official' guide on what abbreviations to use, or whether it's just a convention smile).

I believe this is just a convention, and I am not aware of any official guide.