omniwrap.vim

let s:wrap = {}
let s:last = ''

function! s:omniwrap(name)
  if has_key(s:wrap, &ft)
    let s:wrap[&ft] = []
  endif
  if index(s:wrap[&ft], a:name) == -1
    call add(s:wrap[&ft], a:name)
  endif
  setlocal omnifunc=OmniWrap
endfunction

function! OmniWrap(findstart, base)
  if a:findstart
    let s:last = ''
    if !has_key(s:wrap, &ft)
      return -1
    endif
    for name in s:wrap[&ft]
      try
        let ret = call(name, [a:findstart, a:base])
        if ret >= 0
          let s:last = name
          return ret
        endif
      catch
      endtry
    endif
    return -1
  endif
  
  return call(s:last, [a:findstart, a:base])
endfunction

command! -nargs=1 OmniWrap call s:omniwrap(<q-args>)