GNU bug report logs - #31149
27.0.50; (gui-get-selection nil 'text/html) returns mis-decoded text

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Message #26 received at 31149 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Stefan Monnier <monnier <at> IRO.UMontreal.CA>
Cc: 31149 <at> debbugs.gnu.org
Subject: Re: bug#31149: 27.0.50; (gui-get-selection nil 'text/html) returns
 mis-decoded text
Date: Sun, 29 Sep 2019 10:44:48 +0200

Stefan Monnier <monnier <at> IRO.UMontreal.CA> writes:

> (gui-get-selection nil 'text/html)
>
> returns utf-16 text when the primary selection is owned by Mozilla, but
> we decode it as latin-1 instead, so it looks like garbage.

This is still the case on the trunk:

#("ÿþM^@e^@r^@g^@e^@d^@" 0 14 (foreign-selection STRING charset iso-8859-1))

[...]

> I can't figure out if/where these kinds of things about the X11
> selection protocol is described, but at least in `xclip` they have
> a hack specifically for this case:
>
>     [...]
>     if (html != None && sel_type == html) {
> 	/* if the buffer contains UCS-2 (UTF-16), convert to
> 	 * UTF-8.  Mozilla-based browsers do this for the
> 	 * text/html target.
> 	 */
>     [...]
>
> and according to the subsequent code it's not even always the
> same endianness.

I think it would make sense for us to do the same here.  It should be
easy enough for us to detect that the string is utf-16, I think?  The
data has a BOM and everything...

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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