I tried the latest beta; it fixes the problem I mentioned but breaks something else:

\starttext

\setupalign[r2l]

\definefont[arabicfont][Arial*arabic at 20pt]

\setupdirections[bidi=global,method=default] 

\hbox dir TRT{\arabicfont  (1984)}

\stoptext

If you have \hbox dir TLT, you get expected result. I am not sure if this is the side effect of using \hbox dir TRT.

On Wed, Sep 11, 2013 at 2:20 AM, Vafa Khalighi <persian-tex@tug.org> wrote:

Sorry that is not fixed. If you type two of these, the second one will be broken.

\starttext

\setupalign[r2l]

\definefont[arabicfont][Arial*arabic at 20pt]

\setupdirections[bidi=global,method=default] \arabicfont 

این (آزمایش 1363) و

یک (آزمایش 1984) خوب

 است  و باقی ماجرا.

\stoptext

Vafa Khalighi

On Wed, Sep 11, 2013 at 1:45 AM, Vafa Khalighi <persian-tex@tug.org> wrote:

Thanks. That is now fixed.

On Wed, Sep 11, 2013 at 1:26 AM, Hans Hagen <pragma@wxs.nl> wrote:

On 9/10/2013 2:57 PM, Vafa Khalighi wrote:

Hi

The following document shows the wrong behaviour (the second parentheses
is mirrored incorrectly and it should be after the number not before the
number).

Assuming "test" is an RTL word when I write (test 1363) I expect to get
exactly that but somehow I get (test (1363

new beta ... also with fix for issue khaled mentioned

\starttext

\setupalign[r2l]

\definefont[arabicfont][Arial*arabic at 20pt]

\enabletrackers[typesetters.directions.one]
\enabletrackers[typesetters.directions.two]

\setupdirections[bidi=global,method=default] \arabicfont این (یک آزمایش 1363) است. \par
\setupdirections[bidi=global,method=one]     \arabicfont این (یک آزمایش 1363) است. \par
\setupdirections[bidi=global,method=two]     \arabicfont این (یک آزمایش 1363) است. \par

\stoptext

One related question: is it possible to change font automatically when
luatex sees a LTR word?

no, but you can define start\stop commands that deal with such switches

also, you can combine fonts (and there a yet not documented auto script/language switcher .. i have no time now to explain that one)

btw, never use \textdir and \pardir directly (i might even define them as no-ops some day) but use the higher level alignment commands

Hans

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