GNU bug report logs - #11774
org-mode causes undo boundaries to be lost

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Message #32 received at 11774 <at> debbugs.gnu.org (full text, mbox):

From: Martin Pohlack <mp26 <at> os.inf.tu-dresden.de>
To: Toby Cubitt <toby-dated-1341833729.399c47 <at> dr-qubit.org>
Cc: Bastien <bzg <at> gnu.org>, 11774 <at> debbugs.gnu.org
Subject: Re: [O] bug#11774: org-mode causes undo boundaries to be lost
Date: Tue, 03 Jul 2012 20:33:35 +0200

On 25.06.2012 13:35, Toby Cubitt wrote:
> On Sun, Jun 24, 2012 at 11:52:41PM +0200, Toby Cubitt wrote:
>> On Sun, Jun 24, 2012 at 11:39:08PM +0200, Bastien wrote:
>>> Hi Toby,
>>>
>>> Toby Cubitt <tsc25 <at> cantab.net> writes:
>>>
>>>> For some unknown reason, org-mode is causing the undo boundary between
>>>> the (2 . 4) and (1 . 2) entries to be removed from `buffer-undo-list'.
>>>
>>> Can you try again with
>>>
>>>   (setq org-self-insert-cluster-for-undo nil)
>>>
>>> and report?
>>
>> Yup, that fixes the problem.
>>
>> I don't fully understand the purpose of
>> `org-self-insert-cluster-for-undo', given that the Emacs command loop
>> already groups consecutive undo entries together, but presumably it
>> enables a more aggressive form of clustering.

Just to clarify this little piece here: I originally introduces this
clustering code to mimic emacs' behavior in text mode.  Org-mode's
aggressive interception seemed to prevent that and undoing in org-mode
felt unnatural compared to vanilla text mode.  It was never meant to be
*more* aggressive than emacs' original behavior.

The grouping did not happen at the time.  The original thread is here:

http://lists.gnu.org/archive/html/emacs-orgmode/2009-02/msg00691.html

Martin

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