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From: bojohan+news@dd.chalmers.se (Johan Bockgård)
To: emacs-devel@gnu.org
Subject: Re: Mouse highlighting and fonts
Date: Tue, 27 May 2008 10:58:23 +0200	[thread overview]
Message-ID: <yoij8wxwaztc.fsf@remote5.student.chalmers.se> (raw)
In-Reply-To: 87hccn9m6m.fsf@stupidchicken.com

Chong Yidong <cyd@stupidchicken.com> writes:

> Chong Yidong <cyd@stupidchicken.com> writes:
>
>> when the cursor glyph has a nonzero lbearing or rbearing (i.e., it
>> overlaps with its neighbors), the neighboring glyphs are redrawn, and
>> this can overwrite the mouse-face highlight.  See xdisp.c:19934.
>
> According to the comments, this code is supposed to redraw glyphs that
> are overwritten because of the left/right overhang of the specified
> glyph string.  But I've never noticed overlapping glyphs in Emacs.
> Under what circumstances can overlapping glyphs occur?

See the thread pointed to by Stephen,

http://thread.gmane.org/gmane.emacs.devel/88763

> In other words, would there be any effect from simply turning off the
> overlap-compensation code, as indicated?  Anyone know?

I had quite good results from adding `&& hl == DRAW_NORMAL_TEXT' to the
conditional.

-- 
Johan Bockgård





  parent reply	other threads:[~2008-05-27  8:58 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-05-23 15:09 Mouse highlighting and fonts Chong Yidong
2008-05-23 19:53 ` Chong Yidong
2008-05-24 23:02   ` Stephen Berman
2008-05-25  2:01   ` Chong Yidong
2008-05-25  4:46     ` YAMAMOTO Mitsuharu
2008-05-25  8:21       ` Gerd Möllmann
2008-05-27  8:58     ` Johan Bockgård [this message]
2008-05-27  3:26   ` Chong Yidong
2008-05-27 13:24     ` Stephen Berman

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