function! MyFoldText()
  if !exists('g:foldtext_column')
    let g:foldtext_column = 80 " column to right align foldtext with
  endif

  if !exists('b:foldtext_column')
    let b:foldtext_column = g:foldtext_column " column to right align foldtext with
  endif

  if !exists('g:foldtext_maxcolumn')
    let g:foldtext_maxcolumn = 120
  endif

  let l:linecount = v:foldend - v:foldstart
  " don't display foldmarker braces
  " put one of the braces in brackets so vim doesn't treat
  " it as an actual fold marker
  let l:line = substitute(getline(v:foldstart), '"\?{\({\){', '', '')
  " don't display vim comment quotation marks
  " TODO other comment markers
  let l:line = substitute(l:line, "\^\"\\s\\?", '', '')

  " let l:postfix = l:linecount . ' ' . substitute(v:folddashes, '-', '•', 'g')
  let l:postfix = l:linecount . ' ' . substitute(v:folddashes, '-', '↓', 'g')
  while strchars(l:postfix) < 7
    let l:postfix = ' ' . l:postfix
  endwhile
  " let l:postfix = '  ↓ ' . l:postfix

  let l:len_line = len(l:line)
  let l:len_postfix = strchars(l:postfix)

  if l:len_line + l:len_postfix <= b:foldtext_column
    let l:padding = '                                                                                                                                                                        '[l:len_line + l:len_postfix + 0:b:foldtext_column - 1]
    let l:foldtext = l:line . l:padding . l:postfix
  else
    let l:sniptext = ' ⋯'
    let l:foldtext = l:line[:b:foldtext_column - 1 - strchars(l:sniptext) - l:len_postfix] . l:sniptext . l:postfix
  endif

  return l:foldtext
endfunction

set foldtext=MyFoldText()