GNU bug report logs - #34463
fill-paragraph ruined URL

Previous Next

Full log

Message #18 received at 34463 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 9286 <at> debbugs.gnu.org, 34463 <at> debbugs.gnu.org, cyd <at> stupidchicken.com,
 handa <at> m17n.org, jidanni <at> jidanni.org
Subject: Re: bug#9286: fill-paragraph destroys URLs
Date: Fri, 11 Oct 2019 08:58:52 +0200

Eli Zaretskii <eliz <at> gnu.org> writes:

> Since Kenichi didn't respond, I think we should study what the Unicode
> Line-breaking Algorithm has to say about that.  Can you look there for
> relevant guidance?  We don't yet implement the complete algorithm, but
> some of what they say could nevertheless be used to resolve this
> issue.

That would be this:

https://unicode.org/reports/tr14/

I have just skimmed it, but I can't see that it says anything helpful
about filling/folding lines.

If I read it correctly, then it's perfectly allowed to line-break

asdf國

into

asdf
國

But it doesn't say what software should do when filling

asdf
國

Presumably filling that into

asdf國

would be correct in many circumstances, but as Dan said, if it's really

http://google.com
國

then filling that into 

http://google.com國

is most likely wrong.  So if we want to be cautious, then applying
Chong's patch seems to be the right thing:  Adding the space will lead
to things working more of the time, while the downside is that somebody
might prefer 

asdf國

visually.  I think.

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

Previous Next

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