vim-jsx/ftdetect/javascript.vim at 919bb23895b0109599a6e80d86e5b726913535e2 · mxw/vim-jsx · GitHub

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"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" Vim ftdetect file
"
" Language: JSX (JavaScript)
" Maintainer: Max Wang <mxawng@gmail.com>
"
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""

" Whether the .jsx extension is required.
if !exists('g:jsx_ext_required')
  let g:jsx_ext_required = 1
endif

" Whether the @jsx pragma is required.
if !exists('g:jsx_pragma_required')
  let g:jsx_pragma_required = 0
endif

if g:jsx_pragma_required
  " Look for the @jsx pragma.  It must be included in a docblock comment before
  " anything else in the file (except whitespace).
  let s:jsx_pragma_pattern = '\%^\_s*\/\*\*\%(\_.\%(\*\/\)\@!\)*@jsx\_.\{-}\*\/'
  let b:jsx_pragma_found = search(s:jsx_pragma_pattern, 'npw')
endif

" if g:jsx_check_react_import == 1
"   parse the first line of js file (skipping comments). When it has a 'react'
"   importation, we guess the user writes jsx
" endif
let s:jsx_prevalent_pattern =
      \ '\v\C%^\_s*%(%(//.*\_$|/\*\_.{-}\*/)@>\_s*)*%(import\s+\k+\s+from\s+|%(\l+\s+)=\k+\s*\=\s*require\s*\(\s*)[`"'']react>'

" Whether to set the JSX filetype on *.js files.
fu! <SID>EnableJSX()
  if g:jsx_pragma_required && !b:jsx_pragma_found | return 0 | endif
  if g:jsx_ext_required && !exists('b:jsx_ext_found') &&
        \ !(get(g:,'jsx_check_react_import') && search(s:jsx_prevalent_pattern, 'nw'))
    return 0
  endif
  return 1
endfu

autocmd BufNewFile,BufRead *.jsx let b:jsx_ext_found = 1
autocmd BufNewFile,BufRead *.jsx set filetype=javascript.jsx
autocmd BufNewFile,BufRead *.js
  \ if <SID>EnableJSX() | set filetype=javascript.jsx | endif