GNU bug report logs - #50660
28.0.50; Text artifacting when the cursor moves over text under mouse face that originally displayed a box

Previous Next

Full log

View this message in rfc822 format

From: Po Lu <luangruo <at> yahoo.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: larsi <at> gnus.org, 50660 <at> debbugs.gnu.org
Subject: bug#50660: 28.0.50; Text artifacting when the cursor moves over text under mouse face that originally displayed a box
Date: Sat, 16 Oct 2021 15:13:18 +0800

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

> I don't understand: if the mouse-face changes the font, you want to
> ignore that? why does that make sense?
>
> And mouse-face is defined for ASCII font only anyway, which is why the
> code calls FACE_FOR_CHAR.  You want to ignore the font that this call
> produces?

Yes, precisely.

> A face includes the font, so I don't understand why you want to
> separate them, and how.
>
> As for the old code: are you sure that's not a bug, part of the same
> subtle issue you are trying to fix?

I'm reasonably sure.  Under the old code in *term, moving the mouse over
the entry for `glyphless-char' in list-faces-display results in nothing,
while under the new code (where s->font == s->face->font even under
mouse face) the section under mouse face overlaps with its surroundings
and is otherwise glitchy, because the mouse face's font is larger than
the original face's font.

Previous Next

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