"VIM editing setup for LaTeX"

21 mrt 2024

Open links for \cite{} commands

By lack of a better reference manager, here is a simple code snippet to open the corresponding doi-link from a \cite{} command in latex.

function! OpenDoiForCite()
  let cite_name = expand('<cword>')
  let root = '.'
  let bib_files = globpath(root, '**/*.bib', 1, 1)
  for file in bib_files
    let grepre = '@[a-z]+{' . cite_name . '\s*,(\s*[a-z]+\s*=\s*{[^}]+},?\s*)+}'
    let result = system('grep -zoP "' . grepre . '" ' . file)
    if result != ''
      echo result
      let doi = matchlist(result, 'doi\s*=\s*{\([^}]\+\)}')
      if len(doi) != 0
        echo 'doi:'. string(doi[1])
        execute 'silent !chromium-browser "https://doi.org/' . doi[1] . '"<cr>'
        return
      endif
      let title = matchlist(result, 'title\s*=\s*{\([^}]\+\)}')
      if len(title) != ''
        echo 'title:'. string(title[1])
        let encoded_title = substitute(title[1], ' ', '+', 'g')
        execute 'silent !chromium-browser "https://www.google.com/search?&q=' . encoded_title . '"'
        return
      endif
    endif
  endfor
  echo "DOI or title not found for citation: " . cite_name
endfunction

autocmd FileType tex nnoremap <buffer> K :call OpenDoiForCite()<CR>

Folding

Plug 'matze/vim-tex-fold'

Outline-based navigation

Plug 'vim-voom/VOoM'

autocmd FileType tex nnoremap <BS> :Voom latex<cr>
autocmd FileType voomtree set nofoldenable

Softwrapping

Using some neovim specific settings we obtain really nice softwraps

autocmd FileType tex set wrap
autocmd FileType tex set breakindent
autocmd FileType tex set breakindentopt=shift:2
autocmd FileType tex set showbreak==>
autocmd FileType tex set linebreak

nnoremap j gj
nnoremap k gk
nnoremap $ g$
nnoremap 0 g0
nnoremap ^ g^
nnoremap A g$a
nnoremap I g^i

Forward Synctex

I'm using Evince to view PDFs (the ubuntu default)

wget 'https://raw.githubusercontent.com/Vinno97/evince-synctex/master/evince-synctex.sh'

Then in neovim:

autocmd CursorMoved <buffer> :execute "!bash evince-synctex.sh sync ./build/main.pdf main.tex " . line(".")