From: Chong Yidong <cyd@stupidchicken.com>
To: emacs-devel@gnu.org
Subject: Re: Mouse highlighting and fonts
Date: Fri, 23 May 2008 15:53:54 -0400 [thread overview]
Message-ID: <87tzgog5kd.fsf@stupidchicken.com> (raw)
In-Reply-To: <878wy1giqs.fsf@stupidchicken.com> (Chong Yidong's message of "Fri, 23 May 2008 11:09:15 -0400")
Chong Yidong <cyd@stupidchicken.com> writes:
> With the current CVS code, the mouse highlight preserves the size of the
> underlying face, which avoids the meta-stability problem I mentioned a
> few weeks ago. However, mouse highlighting of the glyph background
> still doesn't work right when the underlying font size varies across the
> highlighted region.
BTW, another mouse-highlighting bug I reported earlier is still present.
Under certain circumstances, the area to the left and/or right of the
physical cursor doesn't acquire the proper mouse-face.
This appears to be a long-standing bug, but one that didn't show up
until the new font code. That's because it arises as follows: 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. This didn't
show up because previously, overlapping glyphs were generally not
encountered.
I'll try to fix this once I get the time, unless someone else fixes it
first.
next prev parent reply other threads:[~2008-05-23 19:53 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 [this message]
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
2008-05-27 3:26 ` Chong Yidong
2008-05-27 13:24 ` Stephen Berman
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