Bubble visual selection horizontally within the line - primer

gistfile1.vim

" BubbleLeft()
" Demo of bubbling in visual mode
" Barry Arthur, 2013-05-24

" When you get BubbleRight() working, collapse them into a
" single Bubble(dir) function.

function! BubbleLeft()
  let sel_save = &selection
  let &selection = "inclusive"
  let reg_save = @@

  normal! `<v`>x
  let len = len(@@)
  normal! hP
  exe "normal! v" . (len - 1) . "h"

  let &selection = sel_save
  let @@ = reg_save
endfunction


vnoremap <left> :<c-u>call BubbleLeft()<cr>