Change latex provider to luatex, closes #476

autoload/vimtex/fzf.vim

@@ -0,0 +1,114 @@
+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#fzf#run(...) abort " {{{1
+  " Arguments: Two optional arguments
+  "
+  " First argument: ToC filter (default: 'ctli')
+  "   This may be used to select certain entry types according to the different
+  "   "layers" of vimtex-toc:
+  "     c:  content: This is the main part and the "real" ToC
+  "     t:  todo: This shows TODOs from comments and `\todo{...}` commands
+  "     l:  label: This shows `\label{...}` commands
+  "     i:  include: This shows included files
+  "
+  " Second argument: Custom options for fzf
+  "   It should be an object containing the parameters passed to fzf#run().
+
+  " Note: The '--with-nth 3..' option hides the first two words from the fzf
+  "       window. These words are the file name and line number and are used by
+  "       the sink.
+  let l:opts = extend({
+      \ 'source': <sid>parse_toc(a:0 == 0 ? 'ctli' : a:1),
+      \ 'sink': function('vimtex#fzf#open_selection'),
+      \ 'options': '--ansi --with-nth 3..',
+      \}, a:0 > 1 ? a:2 : {})
+
+  call fzf#run(l:opts)
+endfunction
+
+" }}}1
+function! vimtex#fzf#open_selection(sel) abort " {{{1
+  let line = split(a:sel)[0]
+  let file = split(a:sel)[1]
+  let curr_file = expand('%:p')
+
+  if curr_file == file
+    execute 'normal! ' . line . 'gg'
+  else
+    execute printf('edit +%s %s', line, file)
+  endif
+endfunction
+
+" }}}1
+
+
+function! s:parse_toc(filter) abort " {{{1
+  " Parsing is mostly adapted from the Denite source
+  " (see rplugin/python3/denite/source/vimtex.py)
+  python3 << EOF
+import vim
+import json
+
+def format_number(n):
+  if not n or not type(n) is dict or not 'chapter' in n:
+      return ''
+
+  num = [str(n[k]) for k in [
+         'chapter',
+         'section',
+         'subsection',
+         'subsubsection',
+         'subsubsubsection'] if n[k] != '0']
+
+  if n['appendix'] != '0':
+     num[0] = chr(int(num[0]) + 64)
+
+  return '.'.join(num)
+
+def colorize(e):
+  try:
+    from colorama import Fore, Style
+    color = {'content' : Fore.WHITE,
+             'include' : Fore.BLUE,
+             'label' : Fore.GREEN,
+             'todo' : Fore.RED}[e['type']]
+    return f"{color}{e['title']:65}{Style.RESET_ALL}"
+  except ModuleNotFoundError:
+    import os
+    if os.name  == 'nt':
+      # Colour support on Windows requires Colorama
+      return f"{e['title']:65}"
+    else:
+      color = {'content' : "\u001b[37m",
+               'include' : "\u001b[34m",
+               'label' : "\u001b[32m",
+               'todo' : "\u001b[31m"}[e['type']]
+      return f"{color}{e['title']:65}\u001b[0m"
+
+def create_candidate(e, depth):
+  number = format_number(dict(e['number']))
+  return f"{e.get('line', 0)} {e['file']} {colorize(e)} {number}"
+
+entries = vim.eval('vimtex#parser#toc()')
+depth = max([int(e['level']) for e in entries])
+filter = vim.eval("a:filter")
+candidates = [create_candidate(e, depth)
+              for e in entries if e['type'][0] in filter]
+
+# json.dumps will convert single quotes to double quotes
+# so that vim understands the ansi escape sequences
+vim.command(f"let candidates = {json.dumps(candidates)}")
+EOF
+
+  return candidates
+endfunction
+
+" }}}1
+
+endif