GNU bug report logs - #13011
24.2; Text flickering moving cursor with box around text enabled

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Package: emacs;

Reported by: mario giovinazzo <mario.giovinazzo <at> virgilio.it>

Date: Tue, 27 Nov 2012 16:34:01 UTC

Severity: minor

Tags: fixed

Merged with 13130, 17612

Found in versions 24.2, 24.2.90, 24.3

Fixed in version 28.1

Done: Noam Postavsky <npostavs <at> gmail.com>

Bug is archived. No further changes may be made.

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Message #14 received at 13011 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 13011 <at> debbugs.gnu.org, mario giovinazzo <mario.giovinazzo <at> virgilio.it>
Subject: Re: bug#13011: 24.2;
	Text flickering moving cursor with box around text enabled
Date: Wed, 28 Nov 2012 23:39:04 -0500

>> (custom-set-variables '(global-hl-line-mode t))
>> (custom-set-faces '(hl-line ((t (:box (:line-width 1 :color "gray50"))))))
> Thanks.

Actually the interesting case is when the box is of width -1.

> I see no flickering when moving cursor horizontally within the same
> screen line.  None at all.

The problem is when moving vertically.

> If the above is what you see, then please tell what you expect Emacs
> to do instead.

When the box width is 1, indeed, there's no much Emacs could do, but
when the width is -1 (i.e. drawn "inside" the normal text box),
characters shouldn't move, whereas they do (they get shifted
horizontally by a few pixels, and if you try it in the *Help* buffer
you may see that the number of pixel shifts seems to increase at
transition points between different fonts, such as italics for function
arguments).


        Stefan
This bug report was last modified 5 years and 49 days ago.

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