bug#11795: 24.1.50; wdired: C-c C-c loses marks and positions of renamed files

[Michael Heerdegen <michael_heerdegen@web.de>]

Hello Juri,

sorry, again, for the long delay.

> > 1.  When I prepend a letter z to the first file in a buffer, so that it
> > will be under the last files after reverting, and I hit C-c C-c, then
> > point is at another file afterwards.  This was an issue of the original
> > report.
>
> This is not a regression, so it could be fixed in the trunk
> in the same way as for `wdired-old-marks', i.e. to store the original
> value returned from `dired-save-positions', changing original filenames
> to renamed filenames in the returned value, and calling
> `dired-restore-positions' with the new value after `revert-buffer'.
> A simple patch below does this.

Ok, that seems reasonable to me.

> > 2.  If renamed files are also visible in another dired buffer, they
> > just disappear there.  That makes no sense.
>
> The problem where other Dired buffers are not updated
> in `wdired-finish-edit' is not a regression too.
> WDired worked this way from its first version.
>
> Instead of this, much simpler would be to keep the current design
> of WDired that uses `revert-buffer' to maintain consistency with renames.
> Then a simpler fix would be to call `revert-buffer' in all other
> Dired buffers that display renamed files by using
>
>   (dired-fun-in-all-buffers dired-directory nil (function revert-buffer))
>
> This patch for the trunk demonstrates how these problems could be fixed.
> Do you see more problems with this approach?

I must say that I'm a bit reluctant to force a revert in other buffers.
Because some aspects of the these buffers may be lost that maybe were
important for the user - like killed files (they reappear when
reverting) or any marks (e.g. belonging to positions stored in a
register).  That's why I tried to avoid reverting.

WRT to the marks in other buffers (see your followup
<87sj7yavw7.fsf@mail.jurta.org>) - I agree we should restore (keep) the
marks in those other buffers when renaming files, and not export the
marks form the buffer where wdired was used.


Thanks,

Michael.