On 2013–08–26 J. R. Schmid wrote:

I've played around with your module and ran into some problems which may have been due to my inexperiencedness with ConTeXt (rupturing of ligatures, at least with Scheherazade and inconsistent line height). Marco has been helping me though, and it looks like he solved those problems while improving on your module while doing so. He doesn't seem to be done with it yet and perhaps he'll want to reply himself when he is, so I'll leave it at that for now :-)

I don't do any Arabic typesetting myself, but I wrapped Idris' idea into a nicer interface¹. Since I don't use it myself, I'll leave it like that until I receive feedback or improvement suggestions. There's no documentation yet, as I don't know how useful this is in the first place. In contrast to Latin script, justifying Arabic text is not solely achieved by varying the inter-word space, but also by means of elongating particular glyps². After having read Idris' article³ it seems like this is a font feature. However, I have no idea which particular feature is responsible for the elongation and how many fonts actually have it. I could not find the mentioned Husayni font anywhere, which seems to be able to do this. So for the time being the justification is only done by varying the inter-word space. Arabic is beautiful! Marco ¹ https://github.com/mpfusion/context-arabic-verse ² http://en.wikipedia.org/wiki/Kashida ³ https://www.tug.org/TUGboat/tb31-2/tb98hamid.pdf