Re: Word boundaries in wdired mode

[martin rudalics]

> There's something screwy about word boundries in wdired mode.  Say I
> have the following files in a directory:
>
> FOO.EXT
> BAR.EXT
> BAZ.EXT
>
> If I try to downcase them by placing point on F and hitting "M-l" a
> number of times, then I end up with this:
>
> foo.ext
> BAR.ext
> BAZ.ext
>
> The first two M-l work as expected, but the next two skips over BAR and
> BAZ respectively.

The patch below should work around this but the bug is inherently with
`operate_on_word': When you have a buffer line like

 FOO.TXT

with point-at-bol and the space before FOO is read-only, `downcase-word'
will fail to downcase FOO even if it's not read-only.

In principle, `operate_on_word' should skip any non-word syntax first
before attempting to downcase the following word.  Unfortunately, Emacs
misses a cheap `forward-nonword' primitive, (skip-syntax-forward "^w")
is a poor substitute.

*** wdired.el.~1.22.~   Sat Dec  9 22:30:12 2006
--- wdired.el   Fri Jan  5 18:22:44 2007
***************
*** 576,583 ****
              (funcall command 1)
              (setq arg (1- arg)))
          (error
!          (if (not (forward-word 1))
!              (setq arg 0)))))))

  (defun wdired-downcase-word (arg)
    "WDired version of `downcase-word'.
--- 576,584 ----
              (funcall command 1)
              (setq arg (1- arg)))
          (error
!          (if (forward-word)
!            (skip-syntax-forward "^w")
!          (setq arg 0)))))))

  (defun wdired-downcase-word (arg)
    "WDired version of `downcase-word'.