vim/after/plugin/togglenumber.vim

   1 " Toggle line numbers {{{1
   2 " needs to be here to override unimpaired maps
   3 function! g:ToggleNumber()
   4     if !exists("b:relanum")
   5         let b:relanum=1
   6     endif
   7     if &l:number
   8         let b:relanum = &relativenumber
   9         setlocal nonumber norelativenumber
  10     else
  11         let &l:relativenumber = b:relanum
  12         setlocal number
  13     endif
  14 endfunction
  15 nnoremap con :call g:ToggleNumber()<cr>