From: Stefan Monnier <monnier@iro.umontreal.ca>
To: martin rudalics <rudalics@gmx.at>
Cc: Glenn Morris <rgm@gnu.org>,
emacs-devel@gnu.org, Bill Wohler <wohler@newt.com>,
Miles Bader <miles@gnu.org>
Subject: Re: undo weirdness with insert-file-contents
Date: Sun, 02 Mar 2008 14:07:20 -0500 [thread overview]
Message-ID: <jwvejatx89y.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <47CAA13E.3040909@gmx.at> (martin rudalics's message of "Sun, 02 Mar 2008 13:44:46 +0100")
> the empty_undo_list check at all. BTW, what is the semantics of
> `insert-file-contents' with VISIT nil and REPLACE non-nil?
It seems obvious to me that it's similar to "delete + insert".
So I guess I don't understand the question quite right. I use this kind
of call to insert-file-contents in smerge-resolve, if you want to see
an example.
>> Also if the file is empty, is this going to mark the buffer as modified
>> even though nothing was changed?
> I'm afraid I don't understand the question - do you mean the case where
> inserted equals zero?
Yes.
> I don't handle that.
What does that mean? Are you going to mark the buffer as modified?
> + /* Else if the present insertion is the very first change of the
> + current buffer, undo information is recorded, and we are
> + neither visiting a file nor replacing buffer contents, make
> + sure we record the insertion as a first change in the
> + undo-list. This is needed in order to avoid that undoing the
> + insertion leaves the buffer's modified state set. */
> + {
> + current_buffer->undo_list = Qnil;
> + record_first_change ();
> + }
Normally record_first_change is called "automatically" elsewhere.
So why is it needed here?
The handling of the undo-list and modified-p status in
insert-file-contents is a real mess. It'd be good to take a step back
and think about how it *should* work. E.g. I don't think
insert-file-contents should mess with modified-p: it should behave just
like a normal `insert' in this respect.
Stefan
next prev parent reply other threads:[~2008-03-02 19:07 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-28 7:46 undo weirdness with insert-file-contents Miles Bader
2008-02-28 9:56 ` martin rudalics
2008-02-28 11:01 ` Miles Bader
2008-02-28 13:12 ` martin rudalics
2008-02-28 16:52 ` Stefan Monnier
2008-02-28 19:31 ` martin rudalics
2008-02-28 20:01 ` Miles Bader
2008-02-28 22:19 ` martin rudalics
2008-02-28 21:35 ` Stefan Monnier
2008-02-28 22:21 ` martin rudalics
2008-02-28 17:45 ` Glenn Morris
2008-02-28 19:35 ` martin rudalics
2008-02-28 20:28 ` Glenn Morris
2008-02-28 22:20 ` martin rudalics
2008-02-29 22:42 ` martin rudalics
2008-03-02 5:02 ` Stefan Monnier
2008-03-02 12:44 ` martin rudalics
2008-03-02 19:07 ` Stefan Monnier [this message]
2008-03-02 22:05 ` martin rudalics
2008-03-03 2:15 ` Stefan Monnier
2008-03-03 9:09 ` martin rudalics
2008-03-03 21:03 ` Stefan Monnier
2008-03-07 9:33 ` martin rudalics
2008-03-07 22:04 ` Stefan Monnier
2008-03-08 9:55 ` martin rudalics
2008-03-02 22:18 ` Bill Wohler
2008-03-03 9:09 ` martin rudalics
2008-02-29 5:50 ` Bill Wohler
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