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From: Toby Cubitt <toby-undo-tree-dated-1342604439.652ef7@dr-qubit.org>
To: Samuel Wales <samologist@gmail.com>
Cc: Bastien <bzg@gnu.org>, Martin Pohlack <mp26@os.inf.tu-dresden.de>,
	Stefan Monnier <monnier@iro.umontreal.ca>,
	11774@debbugs.gnu.org
Subject: bug#11774: bug#11774: bug#11774: org-mode causes undo boundaries to be lost
Date: Wed, 4 Jul 2012 11:40:37 +0200	[thread overview]
Message-ID: <20120704094036.GA23683__36078.5500881777$1341405094$gmane$org@c3po> (raw)
In-Reply-To: <CAJcAo8ujDHZU2xiPh8hnaXgO1m_-cf2tcA6B_LWj-3YczJRzAA@mail.gmail.com>

On Tue, Jul 03, 2012 at 05:18:50PM -0700, Samuel Wales wrote:
> On 7/3/12, Stefan Monnier <monnier@iro.umontreal.ca> wrote:
> >> self-insert-command.  Even just turning that magic 20 number into a
> >> variable would help.
> >
> > Providing it as a variable would be very easy, indeed.
>
> Therefore, IF we have that variable, then undo-boundary considerations
> should be simply to DTRT for undo-tree, org-self-insert-command,
> and other code, in such a way that subtle bugs are prevented.

Just to clarify the situation with undo-tree: it doesn't care how or when
undo boundaries are inserted, and never did. The problem was only that
undo boundaries that had nothing to do with self-insert-command were
being *deleted*, due to the subtle interaction between the new Emacs-24
self-insert-command and org-mode's org-self-insert-cluster-for-undo
feature.

I've already pushed a change to the git version of undo-tree to make it
work even if something else deletes undo boundaries that it shouldn't
have touched (e.g. org-mode + Emacs-24). Deleting boundaries that have
nothing to do with self-insert-command is still a bug, in my opinion, but
it's a bug that no longer has catastrophic consequences in
undo-tree-mode.

It sounds from the preceding discussion that the right solution is simply
to disable org-self-insert-cluster-for-undo in Emacs-24, since the
purpose of org-mode's clustering was to recover the normal clustering
behaviour and the standard self-insert-command clustering now works in
org-mode with Emacs-24.

The question of how to customize the clustering granularity seems to me
to be a separate question (which can presumably be solved by making the
hard-coded 20 into a variable).

Toby
-- 
Dr T. S. Cubitt
Mathematics and Quantum Information group
Department of Mathematics
Complutense University
Madrid, Spain

email: tsc25@cantab.net
web:   www.dr-qubit.org

  parent reply	other threads:[~2012-07-04  9:41 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20120703095729.GA6651@c3po>
2012-07-03 15:18 ` bug#11774: bug#11774: org-mode causes undo boundaries to be lost Martin Pohlack
     [not found] ` <4FF30D50.8010009@os.inf.tu-dresden.de>
2012-07-03 17:29   ` Stefan Monnier
2012-07-03 18:13     ` bug#11774: " Samuel Wales
     [not found]     ` <CAJcAo8t4wj-8mje2=QEKY275QXyxwkotBCftZmOVQZAsMAt7Hg@mail.gmail.com>
2012-07-03 22:57       ` Stefan Monnier
     [not found]       ` <jwvfw984ftk.fsf-monnier+emacs@gnu.org>
2012-07-04  0:18         ` Samuel Wales
     [not found]         ` <CAJcAo8ujDHZU2xiPh8hnaXgO1m_-cf2tcA6B_LWj-3YczJRzAA@mail.gmail.com>
2012-07-04  0:24           ` bug#11774: " Samuel Wales
2012-07-04  9:40           ` Toby Cubitt [this message]
2012-07-18 13:21           ` Stefan Monnier
2012-08-01 14:26             ` Bastien
     [not found]             ` <CAJcAo8ux9Dw5Nu6x0jm59mWFaLWFG6SSeMs9dju-Jgy5nWkUcA@mail.gmail.com>
2014-11-03 14:35               ` Stefan Monnier
     [not found] <20120624212755.GA14501@c3po.home>
     [not found] ` <20120624215241.GA6205@c3po.home>
2012-06-25 11:35   ` Toby Cubitt
     [not found] ` <20120625113529.GA15913@c3po.home>
2012-07-02  6:51   ` bug#11774: " Martin Pohlack
2012-07-03 18:33   ` Martin Pohlack
     [not found] ` <4FF14504.10609@os.inf.tu-dresden.de>
2012-07-03  9:57   ` Toby Cubitt
2014-11-03 19:25 ` bug#11774: Emacs 24.3: newline-and-indent has two undo boundaries Samuel Wales

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