Re: C-u prefix behavior of TAB broken

[martin rudalics]

>>    This said, IMNSHO the feature we're talking about shouldn't be implement
>>    in lisp-mode and c-mode but directly generically in
>>    indent-for-tab-command.
>>
>>If that works, by all means do it.

FWIW all indent-line-functions with the exception of `lisp-indent-line'
either don't have arguments or, like `c-indent-line', `f90-indent-line',
and `(c)perl-indent-line' expect completely different arguments here.
Hence a generic solution seems hardly practicable.

For the case a prefix argument is given and the region is not active, we
could try to set the region around the smallest containing form and call
`indent-region' on that.  But that would be a different feature.

> I'd certainly be grateful!
>
> [I didn't realize I used it so much (on the face of it, it seems like a
> rather obscure bit of functionality), but I find my fingers keep trying
> to invoke it, and I keep being surprised when it doesn't work...  ]

For `lisp-indent-line' I can offer the attached patch.

*** lisp-mode.el.~1.209.~       Tue Oct  9 11:52:54 2007
--- lisp-mode.el        Sat Dec 22 09:55:52 2007
***************
*** 821,827 ****
        (if (> (- (point-max) pos) (point))
          (goto-char (- (point-max) pos)))
        ;; If desired, shift remaining lines of expression the same amount.
!       (and whole-exp (not (zerop shift-amt))
           (save-excursion
             (goto-char beg)
             (forward-sexp 1)
--- 821,831 ----
        (if (> (- (point-max) pos) (point))
          (goto-char (- (point-max) pos)))
        ;; If desired, shift remaining lines of expression the same amount.
!       (and (or whole-exp
!              (and current-prefix-arg
!                   (or (not transient-mark-mode)
!                       (not mark-active))))
!          (not (zerop shift-amt))
           (save-excursion
             (goto-char beg)
             (forward-sexp 1)