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before-string property has no effect if display property is empty string
From: |
Joe Wells |
Subject: |
before-string property has no effect if display property is empty string |
Date: |
Tue, 18 Sep 2007 22:57:44 +0100 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.1 (gnu/linux) |
The documentation leads me to believe that the before-string and
display properties of an overlay should be orthogonal. However, the
before-string is not displayed if the display property is the empty
string.
Reproduce by evaluating this code:
(let ((buf (get-buffer-create "foo")))
(with-current-buffer buf
(display-buffer buf)
(erase-buffer)
(dolist (o (overlays-in (point-min) (point-max)))
(delete-overlay o))
(insert "ABC")
(let ((o (make-overlay 2 3))
(s (make-string 3 ?X)))
(overlay-put o 'display "")
(overlay-put o 'before-string s))))
You will see the “foo” window pop up and in the window you will see
“AC”. I expected that instead “AXXXC” would be shown.
This seems like a bug.
Thanks for your time in considering this bug report.
Joe
======================================================================
In GNU Emacs 22.1.1 (i686-pc-linux-gnu, GTK+ Version 2.8.20)
of 2007-06-27 on artemis
Windowing system distributor `The X.Org Foundation', version 11.0.70000000
configured using `configure '--prefix=/home/jbw/local2' '--enable-debug'
'--disable-nls' '--with-x-toolkit=gtk' 'CFLAGS=-O0 -g3 -ggdb''
Important settings:
value of $LC_ALL: nil
value of $LC_COLLATE: nil
value of $LC_CTYPE: en_US.UTF-8
value of $LC_MESSAGES: nil
value of $LC_MONETARY: nil
value of $LC_NUMERIC: nil
value of $LC_TIME: jbw
value of $LANG: nil
locale-coding-system: utf-8
default-enable-multibyte-characters: t
Major mode: Lisp Interaction
Minor modes in effect:
TeX-source-specials-mode: t
auto-fill-function: do-auto-fill
shell-dirtrack-mode: t
outline-minor-mode: t
desktop-save-mode: t
url-handler-mode: t
tooltip-mode: t
mouse-wheel-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
unify-8859-on-encoding-mode: t
utf-translate-cjk-mode: t
auto-compression-mode: t
temp-buffer-resize-mode: t
size-indication-mode: t
line-number-mode: t
transient-mark-mode: t
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