bug#19872: 24.4; UTF8 characters of unusual width (Gnus markers)

[Eli Zaretskii]

> From: Stefan Monnier <monnier@IRO.UMontreal.CA>
> Cc: Lars Ingebrigtsen <larsi@gnus.org>, sva-news@mygooglest.com,
>         19872@debbugs.gnu.org
> Date: Thu, 19 Feb 2015 08:49:32 -0500
> 
> >> [12345678901234567890] Foo
> >> [12345678901234567890] Foo
> >> [12345678901234567890] Foo
> >> [廣東話廣東話廣東話廣東話廣東話廣東話廣東] Foo
> >> [12345678901234567890] Foo
> >> [12345678901234567890] Foo
> >> [12345678901234567890] Foo
> >> [12345678901234567890] Foo
> >> 
> >> no amount of align-to will make these columns line up.
> 
> > That's a separate problem.  I thought you said that you were
> > truncating too long strings, so I thought these cases were already
> > taken care of.
> 
> The problem is that truncating based on display width is difficult and
> costly if we want to handle proportional fonts.

I agree in general, but cannot see why this particular case couldn't
be resolved reasonably well, e.g. by adding one more column "just in
case", before the :align-to property.