gistfile1.txt

func! MoveWithTmux(keypressed,direction)
  let k = a:keypressed
  let d = a:direction
 
  " get the old window number
  let oldw = winnr()
  exec "wincmd " . k
  let neww = winnr()
  " If we are in the same split, we must be at a boundary so tell tmux to switch split
  if oldw == neww
    " silent so it doesn't show the command.
    " call system vs ! so that the screen doesn't flash
    exe "call system('tmux select-pane " . d . "')"
  end
 
endfunction
 
nnoremap <silent><c-j> :call MoveWithTmux('j', '-D')<cr>
nnoremap <silent><c-k> :call MoveWithTmux('k', '-U')<cr>
nnoremap <silent><c-h> :call MoveWithTmux('h', '-L')<cr>
nnoremap <silent><c-l> :call MoveWithTmux('l', '-R')<cr>