GNU bug report logs - #20623
XML and HTML files with encoding/charset="utf-8" declaration lose BOM; Coding system is reset from utf-8-with-signature to utf-8 on save

Previous Next

Full log

View this message in rfc822 format

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: Simon Ledergerber <sledergerber <at> gmx.net>, 20623 <at> debbugs.gnu.org
Subject: bug#20623: XML and HTML files with encoding/charset="utf-8"	declaration loose BOM; Coding system is reset from utf-8-with-signature to utf-8 on save
Date: Fri, 22 May 2015 11:22:27 -0400

> What would you expect Emacs to do instead?  It just obeys the stated
> encoding, which says nothing about the BOM.  How can Emacs know when
> to use utf-8 and when utf-8-with-signature?

To the extent that Emacs has seen the BOM when opening the file, it
would make sense for Emacs to try and preserve this detail.  IOW the
utf-8 annotation in the XML metadata shouldn't mean "use the utf-8
coding system" but "use a coding system compatible with utf-8".  So if
the coding system is already compatible with utf-8
(e.g. utf-8-with-signature), we should simply keep using that rather
than switch to the utf-8 coding-system.


        Stefan

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.