neovim/runtime/autoload/typst.vim

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" Language: Typst
" Maintainer: Gregory Anders
" Last Change: 2024 Nov 02
" Based on: https://github.com/kaarmu/typst.vim
function! typst#indentexpr() abort
let l:lnum = v:lnum
let s:sw = shiftwidth()
let [l:plnum, l:pline] = s:get_prev_nonblank(l:lnum - 1)
if l:plnum == 0 | return 0 | endif
let l:line = getline(l:lnum)
let l:ind = indent(l:plnum)
let l:synname = synIDattr(synID(l:lnum, 1, 1), 'name')
" Use last indent for block comments
if l:synname == 'typstCommentBlock'
return l:ind
" do not change the indents of bullet lists
elseif l:synname == 'typstMarkupBulletList'
return indent(a:lnum)
endif
if l:pline =~ '\v[{[(]\s*$'
let l:ind += s:sw
endif
if l:line =~ '\v^\s*[}\])]'
let l:ind -= s:sw
endif
return l:ind
endfunction
function typst#foldexpr()
let line = getline(v:lnum)
" Whenever the user wants to fold nested headers under the parent
let nested = get(g:, "typst_foldnested", 1)
" Regular headers
let depth = match(line, '\(^=\+\)\@<=\( .*$\)\@=')
" Do not fold nested regular headers
if depth > 1 && !nested
let depth = 1
endif
if depth > 0
" check syntax, it should be typstMarkupHeading
let syncode = synstack(v:lnum, 1)
if len(syncode) > 0 && synIDattr(syncode[0], 'name') ==# 'typstMarkupHeading'
return ">" . depth
endif
endif
return "="
endfunction
" Gets the previous non-blank line that is not a comment.
function! s:get_prev_nonblank(lnum) abort
let l:lnum = prevnonblank(a:lnum)
let l:line = getline(l:lnum)
while l:lnum > 0 && l:line =~ '^\s*//'
let l:lnum = prevnonblank(l:lnum - 1)
let l:line = getline(l:lnum)
endwhile
return [l:lnum, s:remove_comments(l:line)]
endfunction
" Removes comments from the given line.
function! s:remove_comments(line) abort
return substitute(a:line, '\s*//.*', '', '')
endfunction