GNU bug report logs - #33458
27.0.50; dired loses position when reverted from outside place

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From: Juri Linkov <juri <at> linkov.net>
To: martin rudalics <rudalics <at> gmx.at>
Cc: Stephen Berman <stephen.berman <at> gmx.net>, 33458 <at> debbugs.gnu.org, v88m <at> posteo.net
Subject: bug#33458: 27.0.50; dired loses position when reverted from outside place
Date: Tue, 27 Nov 2018 02:09:42 +0200

>>> A more generic solution might be wanted for other auto-revert clients
>>> as well.  But that's more hairy and not of much use for dired anyway.
>>
>> Is it possible to fix all these problems by not resetting markers to the
>> beginning of the reverted buffer, but allowing markers to keep their
>> previous positions in reverted buffers?
>
> It might work often.  But in the cases where it does not work it will
> cause so much confusion that we won't get through with it.  AFAICT
> even the current point restoring mechanism bows out when characters
> are added/removed at the beginning of the buffer.

Maybe marker-position should allow to call a function?
For example, like 'isearch-push-state-function' remembers
an additional state as a lambda, and when an old state is
restored, a pop-fun lambda is called.  The function that
restores the buffer in the window could be the same.

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