+" Indent if we're at the beginning of a line. Else, do completion.
+function! InsertTabWrapper()
+ let col = col('.') - 1
+ if !col || getline('.')[col - 1] !~ '\k'
+ return "\<Tab>"
+ else
+ return "\<C-N>"
+endif
+endfunction
+inoremap <Tab> <C-R>=InsertTabWrapper()<CR>
+inoremap <S-Tab> <C-P>
+