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

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Message #155 received at 50660 <at> debbugs.gnu.org (full text, mbox):

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: Re: bug#50660: 28.0.50; Text artifacting when the cursor moves over
 text under mouse face that originally displayed a box
Date: Thu, 14 Oct 2021 18:52:48 +0800

[Message part 1 (text/plain, inline)]

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

> It looks like something is still amiss: the cursor blinking display is
> incorrect in some cases.  For example, evaluate this in a buffer under
> Fundamental mode:
>
>   (insert (propertize "some sample text" 'face '(:box 10) 'mouse-face 'highlight))
>
> and then put the mouse pointer above the text, so it's highlighted,
> and move the text cursor to the first 's' or the last 't'.  As long as
> the cursor blinks, you will see two characters drawn in the cursor
> face, not one as expected.

Thanks, here's a patch that should fix the issues, formatted with "git
format-patch", but with one caveat: in your example above, the
background of the character "s" at the beginning of the string "some
sample text" is drawn too wide, but I wasn't able to find the problem.

Could you please take a look at it?  Thanks.

I don't know how to apply the fixes to xterm.c to the other window
systems, so someone who can needs to apply them to the NS and MS-Windows
ports.

[0001-Fix-minor-issues-with-text-display-when-cursor-is-in.patch (text/x-patch, attachment)]

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