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From: "Garreau\, Alexandre" <galex-713@galex-713.eu>
To: Eli Zaretskii <eliz@gnu.org>
Cc: help-gnu-emacs@gnu.org
Subject: Re: point moved despite save-excursion, after deleting/reinserting region
Date: Thu, 18 Oct 2018 11:50:40 +0200	[thread overview]
Message-ID: <87efcnziq7.fsf@portable.galex-713.eu> (raw)
In-Reply-To: <83tvlkq8rz.fsf@gnu.org> (Eli Zaretskii's message of "Thu, 18 Oct 2018 05:38:08 +0300")

On 2018-10-18 at 05:38, Eli Zaretskii wrote:
>> Is there something such as `restore-markers'/`save-markers' that would
>> allow me to restore point after doing this operation?  Or better some
>> `save-buffer-content' like `save-excursion' but restoring the buffer
>> afterwards?
>
> When you delete text, markers pointing into that text cannot follow,
> they get relocated to the beginning/end of the deletion/insertion.
> What else can Emacs do, given that it doesn't know your future
> intentions?

I thought something such as `save-excursion' would do that, or that it
would be saved with the string, or something alike.

> If that's what you want, why not record the position of point before
> the delete/insert operation and restore it afterwards?

So is that the canonical way of doing? that feels like defeating the
purpose of `save-excursion' a little bit (I only wanted to produce a
result for this src-block), and as this is more complex behavior than
just “undoing backward” or anything part of core elisp, I feared
side-effects I wouldn’t be aware of: for instance tho, it means my
function will have the side-effects of moving all the markers (and maybe
other similar things) that were inside that portion of text: it feels
somewhat hardly like “restoring as before”.



  reply	other threads:[~2018-10-18  9:50 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-17  1:43 point moved despite save-excursion, after deleting/reinserting region Garreau, Alexandre
2018-10-17 16:12 ` Eli Zaretskii
2018-10-17 20:13   ` Garreau, Alexandre
2018-10-18  2:38     ` Eli Zaretskii
2018-10-18  9:50       ` Garreau, Alexandre [this message]
2018-10-18 11:32         ` Yuri Khan
2018-10-18 11:45           ` Garreau, Alexandre
2018-10-18 13:16         ` Eli Zaretskii
2018-10-18 18:08           ` Saving (and finding) markers (Was: Re: point moved despite save-excursion, after deleting/reinserting region) Garreau, Alexandre
2018-10-18 18:32             ` Eli Zaretskii
2018-10-18 19:36               ` Saving (and finding) markers Garreau, Alexandre
2018-10-18 20:11                 ` Eli Zaretskii
2018-10-19  1:15               ` Stefan Monnier
2018-10-19  6:38                 ` Eli Zaretskii

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