Re: Fwd: overlay face property not used for after-string property

[Stefan Monnier <monnier@iro.umontreal.ca>]

> Would someone please fix this, then ack?

I don't think I can fix it, but I remember discussion of something similar
a few years ago where the conclusion was thatit was better to not apply a
property of the overlay (e.g. `face' although I believe the discussion was
about `invisible') to the (after|before)-string because it's easier to add
this property manually to the relevant string than to "undo" the effect of
the overlay's property from the string.


        Stefan


> ------- Start of forwarded message -------
> X-Spam-Status: No, score=0.0 required=5.0 tests=UNPARSEABLE_RELAY 
> 	autolearn=failed version=3.1.0
> To: bug-gnu-emacs@gnu.org
> From: Joe Wells <jbw@macs.hw.ac.uk>
> Date: Sun, 21 Oct 2007 04:14:55 +0100
> MIME-Version: 1.0
> Content-Type: text/plain; charset=utf-8
> Subject: overlay face property not used for after-string property

> BUG:??An overlay's face property is applied to its before-string
> and display properties, but not to its after-string property.

> Reproduce with this expression (see below for definition of
> test-in-fresh-buffer-and-window):

>   (test-in-fresh-buffer-and-window
>    (insert "123")
>    (let ((o (make-overlay 2 3)))
>      (overlay-put o 'before-string "B")
>      (overlay-put o 'after-string "A")
>      (overlay-put o 'display "D")
>      (overlay-put o 'face 'highlight)))

> This displays ?1BDA3?.  The ?BDA? portion should be displayed
> with face ?highlight?, which means that the background should be
> colored ?darkseagreen2?.  However, only the ?BD? portion is
> displayed with face ?highlight? and the ?A? portion is wrongly
> not displayed with any special face.

> I'm assuming the following macro definition in my reproduction
> code above:

>   (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
>          )))

> I hope this bug report is helpful.

> 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

> Minor modes in effect:
>   TeX-source-specials-mode: t
>   outline-minor-mode: t
>   desktop-save-mode: t
>   url-handler-mode: t
>   tooltip-mode: t
>   mouse-wheel-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
> ------- End of forwarded message -------


> _______________________________________________
> Emacs-devel mailing list
> Emacs-devel@gnu.org
> http://lists.gnu.org/mailman/listinfo/emacs-devel