Re: Tick Reduction

[Eli Zaretskii]

> Date: Sun, 21 Nov 2021 22:42:30 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: dgutov@yandex.ru, stefankangas@gmail.com, emacs-devel@gnu.org
> 
> > From: Lars Ingebrigtsen <larsi@gnus.org>
> > Cc: emacs-devel@gnu.org,  stefankangas@gmail.com,  dgutov@yandex.ru
> > Date: Sun, 21 Nov 2021 21:28:27 +0100
> > 
> > Eli Zaretskii <eliz@gnu.org> writes:
> > 
> > > This is a 'display' text property, right?  It is placed on text;
> > > instead of that text Emacs will display a stretch glyph (white space)
> > > whose width is calculated as the pixel width of the first character
> > > "covered" by the property multiplied by FACTOR.
> > 
> > (shr-string-pixel-width
> >  (propertize "칹a" 'display '(space :relative-width 1)))
> > => 22
> > 
> > (shr-string-pixel-width
> >  (propertize "a칹" 'display '(space :relative-width 1)))
> > => 22
> 
> A bug?

Definitely a bug.  I have a provisional fix, and will install
tomorrow, together with a fix for another bug: the current code
doesn't support this property on a string (as opposed to on buffer
text).