Change latex provider to luatex, closes #476

autoload/vimtex/echo.vim

@@ -0,0 +1,121 @@
+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#echo#echo(message) abort " {{{1
+  echohl VimtexMsg
+  echo a:message
+  echohl None
+endfunction
+
+" }}}1
+function! vimtex#echo#input(opts) abort " {{{1
+  if g:vimtex_echo_verbose_input
+        \ && has_key(a:opts, 'info')
+    call vimtex#echo#formatted(a:opts.info)
+  endif
+
+  let l:args = [get(a:opts, 'prompt', '> ')]
+  let l:args += [get(a:opts, 'default', '')]
+  if has_key(a:opts, 'complete')
+    let l:args += [a:opts.complete]
+  endif
+
+  echohl VimtexMsg
+  let l:reply = call('input', l:args)
+  echohl None
+  return l:reply
+endfunction
+
+" }}}1
+function! vimtex#echo#choose(list_or_dict, prompt) abort " {{{1
+  if empty(a:list_or_dict) | return '' | endif
+
+  return type(a:list_or_dict) == type({})
+        \ ? s:choose_dict(a:list_or_dict, a:prompt)
+        \ : s:choose_list(a:list_or_dict, a:prompt)
+endfunction
+
+" }}}1
+function! vimtex#echo#formatted(parts) abort " {{{1
+  echo ''
+  try
+    for part in a:parts
+      if type(part) == type('')
+        echohl VimtexMsg
+        echon part
+      else
+        execute 'echohl' part[0]
+        echon part[1]
+      endif
+      unlet part
+    endfor
+  finally
+    echohl None
+  endtry
+endfunction
+
+" }}}1
+
+function! s:choose_dict(dict, prompt) abort " {{{1
+  if len(a:dict) == 1
+    return values(a:dict)[0]
+  endif
+
+  while v:true
+    redraw!
+    if !empty(a:prompt)
+      echohl VimtexMsg
+      unsilent echo a:prompt
+      echohl None
+    endif
+
+    let l:choice = 0
+    for l:x in values(a:dict)
+      let l:choice += 1
+      unsilent call vimtex#echo#formatted([['VimtexWarning', l:choice], ': ', l:x])
+    endfor
+
+    try
+      let l:choice = str2nr(input('> ')) - 1
+      if l:choice >= 0 && l:choice < len(a:dict)
+        return keys(a:dict)[l:choice]
+      endif
+    endtry
+  endwhile
+endfunction
+
+" }}}1
+function! s:choose_list(list, prompt) abort " {{{1
+  if len(a:list) == 1 | return a:list[0] | endif
+
+  while v:true
+    redraw!
+    if !empty(a:prompt)
+      echohl VimtexMsg
+      unsilent echo a:prompt
+      echohl None
+    endif
+
+    let l:choice = 0
+    for l:x in a:list
+      let l:choice += 1
+      unsilent call vimtex#echo#formatted([['VimtexWarning', l:choice], ': ', l:x])
+    endfor
+
+    try
+      let l:choice = str2nr(input('> ')) - 1
+      if l:choice >= 0 && l:choice < len(a:list)
+        return a:list[l:choice]
+      endif
+    endtry
+  endwhile
+endfunction
+
+" }}}1
+
+endif