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

[Stefan Monnier]

> 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


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> To: address@hidden
> From: Joe Wells <address@hidden>
> 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:
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>   locale-coding-system: utf-8
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> Minor modes in effect:
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>   desktop-save-mode: t
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> ------- End of forwarded message -------


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