Re: bidi, auto-composition-mode

[Angelo Graziosi <angelo.graziosi@alice.it>]

Il 21/04/2010 5.09, Eli Zaretskii ha scritto:
>> Date: Wed, 21 Apr 2010 01:00:38 +0200
>> From: Angelo Graziosi<angelo.graziosi@alice.it>
>> CC: Eli Zaretskii<eliz@gnu.org>
>>
>> Eduard Wiebe wrote:
>>> I'm playing with the new bidi-feature, thanks Eli, and receive a
>>> strange result.
>> [...]
>>> the display order
>>> indeed reversed but some characters are duplicated (s. attachment).
>>
>> The same happens on Cygwin (GTK build of the trunk).
>>
>> Trying to write "This is a test", it writes, initially, two T instead of
>> one, so the result is
>>
>> This is a testT
>>                ^^^
>
> ??? The OP used Hebrew letters and auto-composed characters, but you
> used only ASCII, so this is a different problem.  Please tell me what
> did you type to get this displayed flushed to the right and T doubled.

OK. In my $HOME/.emacs.d/init.el file I have added this:

;; Use C-x 8 RET RIGHT-TO-LEFT MARK to write from right to left
(setq-default bidi-display-reordering t)

Then, in Emacs, I do this

C-x C-f foo.txt
C-x 8 RET RIGHT-TO-LEFT MARK

Then I start to type "This is a test" (all starts to the right, 
obviously). When I type the firt 'T', really in Emacs, I see two 'T',

TT

Then, I type 'h',

ThT

and so on

ThiT
ThisT
This iT
This isT
...
This is a testT

with the cursor always to the left of the most left 'T' (that near the 
'h', i.e. 'Th'). If now I do

M-x auto-composition-mode

the result is:

This is a test

without the most right 'T'!

I obtain the *same* results both on Cygwin and on GNU/Linux kubuntu 9.10 
(GTK builds rev. >= 99951).

Ciao,
Angelo.