[NTG-context] r2l alignment and linenumbering conflict?

talazem at fastmail.fm talazem at fastmail.fm
Sun Aug 2 22:46:44 CEST 2015

Thank you very much for this, Idris. What with the other bugs and problems I’ve faced with R2L (in footnotes, etc.), I was starting to wonder whether a more explicit, rather than global, use of RTL might be a better approach. I’m going to experiment with them, at least to learn how to use them with greater focus.

The good news is that apparently Hans has already patched the page-lin.lua file that Wolfgang had identified as the culprit, and it will be included in the next beta. 

Many thanks to you, Pablo, Wolfgang, and of course Hans so much for your help in getting these right-to-left issues solved. There are a couple of small bidi issues remaining, including that mentioned in the “footnotes when using RtL (Arabic)” thread. The one or two other ones I will post shortly. But, in any case, I have now completely moved my project over into ConTeXt, confident that it (and the team behind it) can handle all of the needs of a multilingual academic monograph and of a bi-direction, Arabic critical edition’s need

With many thanks,

> On 2 Aug 2015, at 18:15, Idris Samawi Hamid ادريس سماوي حامد <Idris.Hamid at colostate.edu> wrote:
> Dear Talal,
> Salaam. See below:
> On Sun, 02 Aug 2015 07:31:37 -0600, talazem at fastmail.fm <talazem at fastmail.fm> wrote:
>> Thank you very much for this, Idris. It works nicely in the sample file you sent. But it goes off again once you add \setupdirections[bidi=global]. Consider the following:
>> ==========
> <snip>
>> \setupdirections[bidi=global]
>> \setupthinrules[color=white]
>> \setupwhitespace[big]
>> \section{Incorrect}
>> \startlinenumbering
>> \startalignment[r2l]
>> هذه رسالة لطيفة ألفها العالم الكبير الفهامة النحرير.
>> هذه رسالة جامعة مانعة ألفها الشيخ الفاضل...
>> \thinrule
>> ===========
> You're right. \thinrule has LR unicode characters which is probably why it gets thrown off. So if you turn off global bidi and then either 1) just go with either global RL or 2) invoke RL inside the linenumbering it will work:
> % \setupdirections[bidi=global]
> \righttoleft %% global RL
> or just
> \startlinenumbering
> \righttoleft %% local RL, not needed if global RL invoked
> \startalignment[r2l]
> Again, it's a barbarous (and temporary) workaround. See attached.
> Wassalaam
> Idris
> PS Unless there is a lot of Latin in the critical edition file, I would probably depend more on explicit dir commands (\righttolet, \lefttoright) and less on bidi, which is still buggy in a number of ways. Beyond the ConTeXt implementation: The unicode bidi algorithm was not designed with advanced typesetting and typography in mind, works best for text-editing etc. per se. so local bidi *may perhaps* be more useful than global bidi for the critical-edition portion your project.
> I'm not at all suggesting that this particular bug should not be a priority; printing paragraph lines in a linenumbering environment *must* be direction-agnostic. Just a matter of general strategy to consider.
> -- 
> Idris Samawi Hamid
> Professor of Philosophy
> Colorado State University
> Fort Collins, CO 80523<r2l-linenumbering-arabic.tex><r2l-linenumbering-arabic.pdf>___________________________________________________________________________________
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