Using a .fea file disable arabic contextual analysis

Using a .fea file disable arabic contextual analysis

[Khaled Hosny]

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See the attached files, the mark features seem to work but contextual
forms (init, medi amnd fina) don't

Regards,


-- 
 Khaled Hosny
 Arabic localizer and member of Arabeyes.org team

[-- Attachment #1.1.2: fea.tex --]
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\installfontfeature[otf][ardi]

\definefontfeature
 [fea]
 [mode=node,language=dflt,script=arab,
  init=yes,medi=yes,fina=yes,isol=yes,
  liga=yes,dlig=yes,rlig=yes,frac=yes,
  calt=yes,ccmp=yes,kern=yes,mark=yes,
  mkmk=yes,ardi=yes,featurefile=digit.fea]

\font\ara=arabtype*fea at 20pt\ara
\textdir TRT\pardir TRT
بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيم

1234567890
\bye

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lookup ArabicDigits {
    lookupflag 0 ;
	sub zero  by uni0660 ;
	sub one   by uni0661 ;
	sub two   by uni0662 ;
	sub three by uni0663 ;
	sub four  by uni0664 ;
	sub five  by uni0665 ;
	sub six   by uni0666 ;
	sub seven by uni0667 ;
	sub eight by uni0668 ;
	sub nine  by uni0669 ;
} ArabicDigits ;

feature ardi {
    script arab ;
        language dflt ;
            lookup ArabicDigits ;
} ardi ;

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Re: Using a .fea file disable arabic contextual analysis

[Idris Samawi Hamid ادريس سماوي حامد]

Salaam, Khaled,


On Fri, 31 Oct 2008 08:12:34 -0600, Khaled Hosny <khaledhosny@eglug.org>  
wrote:

> See the attached files, the mark features seem to work but contextual
> forms (init, medi amnd fina) don't

As a workaround, try using a fallback, defining two fontfeature's and  
letting arabtype fall back on itself for just those digits (untested here).

Best wishes
Idris

-- 
Professor Idris Samawi Hamid, Editor-in-Chief
International Journal of Shi`i Studies
Department of Philosophy
Colorado State University
Fort Collins, CO 80523
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________