> Date: Tue, 7 Sep 2010 17:08:01 +0200 (CEST)
> From: mhi...@free.fr
> Cc: emacs-bidi@gnu.org, emacs-de...@gnu.org
> 
> - copy arabic text from two different applications to emacs 
> it works correctly exepted that tashkeel seems lost when the source include 
> it.
> But after verification if I try to mark the region in question the tashkeel 
> appears :)

It's probably some bad interaction between compositions and the
handling of faces in the bidirectional display.  Perhaps Handa-san
could take a look at xdisp.c:handle_stop_backwards and how it is
called inside next_element_from_buffer -- there might be some bugs
there whereby only part of the composed sequence is redrawn when the
region is extended or contracted.

> In my dot emacs i found what may be the cause of my problem.
> 
> 
>  '(selection-coding-system (quote utf-8-dos))

This one is your problem: you should never do that on MS-Windows.

>  '(unify-8859-on-decoding-mode t)
>  '(unify-8859-on-encoding-mode t)

These are obsolete, as everything is always unified in Emacs 24.

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