Completion using codic-vim

codic-complete.vim

inoremap <silent> <C-x><C-t>  <C-R>=<SID>codic_complete()<CR>
function! s:codic_complete()
  let line = getline('.')
  let start = match(line, '\k\+$')
  let cand = s:codic_candidates(line[start :])
  call complete(start +1, cand)
  return ''
endfunction
function! s:codic_candidates(arglead)
  let cand = codic#search(a:arglead, 30)
  " error
  if type(cand) == type(0)
    return []
  endif
  " english -> english terms
  if a:arglead =~# '^\w\+$'
    return map(cand, '{"word": v:val["label"], "menu": join(map(copy(v:val["values"]), "v:val.word"), ",")}')
  endif
  " japanese -> english terms
  return s:reverse_candidates(cand)
endfunction
function! s:reverse_candidates(cand)
  let _ = []
  for c in a:cand
    for v in c.values
      call add(_, {"word": v.word, "menu": !empty(v.desc) ? v.desc : c.label })
    endfor
  endfor
  return _
endfunction