GNU bug report logs - #52569
29.0.50; Wishlist: There should be a way for packages to handle files without reading them in first

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Message #14 received at 52569 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Kangas <stefan <at> marxist.se>
To: Juri Linkov <juri <at> linkov.net>
Cc: Lars Ingebrigtsen <larsi <at> gnus.org>, 52569 <at> debbugs.gnu.org
Subject: Re: bug#52569: 29.0.50; Wishlist: There should be a way for packages
 to handle files without reading them in first
Date: Sun, 19 Dec 2021 12:00:06 -0800

Juri Linkov <juri <at> linkov.net> writes:

>> This would be useful for large files like .sqlite and images.
>
> I'm not sure about images since some image formats are editable,
> like .svg, .xpm, .ps...  Only .pdf with in doc-view-mode could have
> this optimization of not loading the whole file.  Also archive files
> could benefit from this optimization.

This would improve performance, right?  If yes, I think this is sorely
needed for opening images in Emacs (though there are other things to
improve as well).  I think the editable image formats are in the
minority, so we could always handle them differently.

> Or when it returns t, this could mean that the function displayed
> the buffer in some other way, for example, by calling an external command.

Yes, that would be very nice.  I have wanted something like that to
replace the openwith package in my own use.

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