Change latex provider to luatex, closes #476

autoload/vimtex/parser.vim

@@ -0,0 +1,144 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'latex') == -1
+
+" vimtex - LaTeX plugin for Vim
+"
+" Maintainer: Karl Yngve Lervåg
+" Email:      karl.yngve@gmail.com
+"
+
+function! vimtex#parser#tex(file, ...) abort " {{{1
+  return vimtex#parser#tex#parse(a:file, a:0 > 0 ? a:1 : {})
+endfunction
+
+" }}}1
+function! vimtex#parser#preamble(file, ...) abort " {{{1
+  return vimtex#parser#tex#parse_preamble(a:file, a:0 > 0 ? a:1 : {})
+endfunction
+
+" }}}1
+function! vimtex#parser#auxiliary(file) abort " {{{1
+  return vimtex#parser#auxiliary#parse(a:file)
+endfunction
+
+" }}}1
+function! vimtex#parser#fls(file) abort " {{{1
+  return vimtex#parser#fls#parse(a:file)
+endfunction
+
+" }}}1
+function! vimtex#parser#toc(...) abort " {{{1
+  let l:vimtex = a:0 > 0 ? a:1 : b:vimtex
+
+  let l:cache = vimtex#cache#open('parsertoc', {
+        \ 'persistent': 0,
+        \ 'default': {'entries': [], 'ftime': -1},
+        \})
+  let l:current = l:cache.get(l:vimtex.tex)
+
+  " Update cache if relevant
+  let l:ftime = l:vimtex.getftime()
+  if l:ftime > l:current.ftime
+    let l:cache.modified = 1
+    let l:current.ftime = l:ftime
+    let l:current.entries = vimtex#parser#toc#parse(l:vimtex.tex)
+  endif
+
+  return deepcopy(l:current.entries)
+endfunction
+
+" }}}1
+function! vimtex#parser#bib(file, ...) abort " {{{1
+  return vimtex#parser#bib#parse(a:file, a:0 > 0 ? a:1 : {})
+endfunction
+
+" }}}1
+
+function! vimtex#parser#get_externalfiles() abort " {{{1
+  let l:preamble = vimtex#parser#preamble(b:vimtex.tex)
+
+  let l:result = []
+  for l:line in filter(l:preamble, 'v:val =~# ''\\externaldocument''')
+    let l:name = matchstr(l:line, '{\zs[^}]*\ze}')
+    call add(l:result, {
+          \ 'tex' : l:name . '.tex',
+          \ 'aux' : l:name . '.aux',
+          \ 'opt' : matchstr(l:line, '\[\zs[^]]*\ze\]'),
+          \ })
+  endfor
+
+  return l:result
+endfunction
+
+" }}}1
+function! vimtex#parser#selection_to_texfile(type, ...) range abort " {{{1
+  "
+  " Get selected lines. Method depends on type of selection, which may be
+  " either of
+  "
+  " 1. range from argument
+  " 2. Command range
+  " 3. Visual mapping
+  " 4. Operator mapping
+  "
+  if a:type ==# 'arg'
+    let l:lines = getline(a:1[0], a:1[1])
+  elseif a:type ==# 'cmd'
+    let l:lines = getline(a:firstline, a:lastline)
+  elseif a:type ==# 'visual'
+    let l:lines = getline(line("'<"), line("'>"))
+  else
+    let l:lines = getline(line("'["), line("']"))
+  endif
+
+  "
+  " Use only the part of the selection that is within the
+  "
+  "   \begin{document} ... \end{document}
+  "
+  " environment.
+  "
+  let l:start = 0
+  let l:end = len(l:lines)
+  for l:n in range(len(l:lines))
+    if l:lines[l:n] =~# '\\begin\s*{document}'
+      let l:start = l:n + 1
+    elseif l:lines[l:n] =~# '\\end\s*{document}'
+      let l:end = l:n - 1
+      break
+    endif
+  endfor
+
+  "
+  " Check if the selection has any real content
+  "
+  if l:start >= len(l:lines)
+        \ || l:end < 0
+        \ || empty(substitute(join(l:lines[l:start : l:end], ''), '\s*', '', ''))
+    return {}
+  endif
+
+  "
+  " Define the set of lines to compile
+  "
+  let l:lines = vimtex#parser#preamble(b:vimtex.tex)
+        \ + ['\begin{document}']
+        \ + l:lines[l:start : l:end]
+        \ + ['\end{document}']
+
+  "
+  " Write content to temporary file
+  "
+  let l:file = {}
+  let l:file.root = b:vimtex.root
+  let l:file.base = b:vimtex.name . '_vimtex_selected.tex'
+  let l:file.tex  = l:file.root . '/' . l:file.base
+  let l:file.pdf = fnamemodify(l:file.tex, ':r') . '.pdf'
+  let l:file.log = fnamemodify(l:file.tex, ':r') . '.log'
+  call writefile(l:lines, l:file.tex)
+
+  return l:file
+endfunction
+
+" }}}1
+
+endif