From: Bob Rogers <rogers-emacs@rgrjr.dyndns.org>
Cc: emacs-devel@gnu.org
Subject: Re: Bug in incremental undrawing of mouseover highlighting
Date: Sun, 19 Nov 2006 18:45:24 -0500 [thread overview]
Message-ID: <17760.60564.194013.680591@rgrjr.dyndns.org> (raw)
In-Reply-To: <85u00v830n.fsf@lola.goethe.zz>
From: David Kastrup <dak@gnu.org>
Date: Sun, 19 Nov 2006 23:50:32 +0100
Bob Rogers <rogers-emacs@rgrjr.dyndns.org> writes:
> It seems that mouseover background highlighting is not undrawn if
> replaced by the same unhighlighted text. This happens in the CVS
> version as of late on 11-Nov. (I have seen this bug for some time now,
> but only just thought of a (relatively) easy way to reproduce it.)
>
> To reproduce:
>
> 1. "emacs -Q"
>
> 2. "C-x d RET". This gets a dired buffer; the exact directory
> doesn't matter as long as it has at least a few files in it. (And, for
> some reason, "." and ".." don't count.)
>
> 3. "C-x h M-w C-x b *scratch* RET C-y M-<". This gets a copy of the
> dired buffer contents; sometimes they come with dired fontification, and
> sometimes not. The same text should be displayed in the same character
> positions in both dired and *scratch* buffers.
>
> 4. "C-x b RET" to get back to the dired buffer, and move the mouse
> over a file name so that it is highlighted in green.
>
> 5. "C-x b RET" to return to *scratch*. Notice that the same
> characters in the same position are still highlighted in green.
>
> 6. Move the mouse to a different file name. Usually the
> highlighting goes away, but sometimes it doesn't (and it doesn't
> correlate with fontification). If it does persist, type "C-x b RET" to
> return once more to the dired buffer, and there will be two green file
> names -- this can be repeated until every file name is green.
For people wanting to debug this: I have the slight suspicion that the
problem is masked usually because some well-meaning workaround
suppresses the highlighting of partial lines that _should_ be
highlighted when a buffer pops up under the mouse cursor. Often the
highlighting only starts once one moves the mouse cursor. And I think
that the problem might be triggered when only parts of the line are
to be highlighted.
I have no recipe for reproduction now, this is rather irregular and
tends to occur in the newsreader for me, which means that there is no
repeatable recipe.
--
David Kastrup, Kriemhildstr. 15, 44793 Bochum
Indeed; I first noticed this in vm-summary-mode, where each line
represents a message. But there the whole line is highlighted. When I
switch from the VM summary buffer to a buffer that matches the same line
in its entirety, all mouseover highlighting is preserved; when I switch
to a buffer that matches it partially, highlighting is correctly cleared
only for those positions that must be changed to display different
characters.
-- Bob
next prev parent reply other threads:[~2006-11-19 23:45 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-19 22:32 Bug in incremental undrawing of mouseover highlighting Bob Rogers
2006-11-19 22:50 ` David Kastrup
2006-11-19 23:45 ` Bob Rogers [this message]
2006-12-13 14:45 ` Stephen Berman
2006-12-13 16:04 ` Chong Yidong
2006-12-14 9:22 ` Stephen Berman
2006-12-16 12:31 ` Stephen Berman
2006-11-20 4:20 ` Eli Zaretskii
2006-11-20 19:22 ` Chong Yidong
2006-11-20 20:24 ` misleading install instruction in emacs/mac/INSTALL Gilbert Harman
2006-11-21 7:47 ` Richard Stallman
2006-11-22 8:23 ` YAMAMOTO Mitsuharu
2006-11-22 17:07 ` Gilbert Harman
2006-11-20 20:36 ` Bug in incremental undrawing of mouseover highlighting Eli Zaretskii
2006-11-22 4:06 ` Bob Rogers
2006-11-22 18:35 ` Eli Zaretskii
2006-11-22 15:07 ` Chong Yidong
2006-11-22 22:20 ` Eli Zaretskii
2006-11-22 23:57 ` Nick Roberts
2006-11-23 4:12 ` Eli Zaretskii
2006-11-23 4:50 ` Nick Roberts
2006-11-24 18:18 ` Eli Zaretskii
2006-11-25 1:53 ` YAMAMOTO Mitsuharu
2006-11-25 4:18 ` Chong Yidong
2006-11-25 7:28 ` YAMAMOTO Mitsuharu
2006-11-25 10:53 ` Eli Zaretskii
2006-11-25 16:18 ` Chong Yidong
2006-11-25 21:10 ` Eli Zaretskii
2006-11-26 19:05 ` Kim F. Storm
2006-12-26 2:26 ` Richard Stallman
2006-12-27 3:58 ` Bob Rogers
2006-12-27 21:16 ` Richard Stallman
2007-01-02 15:46 ` Kim F. Storm
2007-01-05 0:38 ` Michael Mauger
2007-01-19 15:33 ` Chong Yidong
2007-01-20 21:40 ` Stephen Berman
2007-01-21 14:36 ` Stephen Berman
2007-11-07 22:18 ` Stephen Berman
2007-01-23 16:28 ` John Paul Wallington
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