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Another overlay display bug
From: |
Richard Stallman |
Subject: |
Another overlay display bug |
Date: |
Mon, 10 Dec 2007 10:19:14 -0500 |
Would someone please fix this, then ack?
To: address@hidden
From: Joe Wells <address@hidden>
Date: Sat, 20 Oct 2007 06:43:43 +0100
In-Reply-To: <address@hidden> (Joe Wells's message of "Sat\,
20 Oct 2007 06\:32\:19 +0100")
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Subject: Re: two display bugs involving interactions between after-string
and display properties of adjacent overlays
Joe Wells <address@hidden> writes:
> Here are two more display bugs I found while trying to improve the
> code in tex-fold.el in AUCTeX.
Here is a third such bug.
> These bugs involve interactions between after-string and display
> properties of adjacent overlays.
Ditto.
> I'm assuming this macro in my reproduction code below:
>
> (defmacro test-in-fresh-buffer-and-window (&rest body)
> `(progn
> (delete-other-windows)
> (kill-buffer (get-buffer-create "xyzzy"))
> (let ((xyzzy-buf (get-buffer-create "xyzzy")))
> (set-buffer xyzzy-buf)
> (display-buffer xyzzy-buf)
> ,@body
> )))
Ditto.
> BUG #1: ...
> BUG #2: ...
BUG #3: An overlay's after-string property is not displayed if an
immediately following overlay has the empty string as its display
property.
Reproduce with this expression:
(test-in-fresh-buffer-and-window
(insert "ABCD")
(let ((o1 (make-overlay 2 3))
(o2 (make-overlay 3 4)))
(overlay-put o1 'after-string "1")
(overlay-put o2 'display "")))
The above expression should display ?AB1D?.
The above expression wrongly actually displays ?ABD?.
> ======================================================================
> In GNU Emacs 22.1.1 (i686-pc-linux-gnu, GTK+ Version 2.8.20) ...
Same details as in last message.
I hope this bug report is helpful.
--
Joe
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