I don't know if this is useful or not ... a little code from Jonathan to
assist with "kashida" --- he maps ranges of Unicode points to classes.
Is this what you've done, Mike? I haven't looked yet at your
ucharclasses, but will soon (I'm on breakfast clean up in 5 minutes!).
Here's the code.
Good luck!
--
United in adoration of Jesus,
fr. michael gilmary, mma
Most Holy Trinity Monastery
67 Dugway Road
Petersham, MA 01366-9725
www.MaroniteMonks.org
%% Configure xetex to do "kashida" justification in Persian text --- from
Jonathan Kew. Mapping for Syriac added.
\chardef\zwj="200D % zero-width joiner
\chardef\ksh="0640 % kashida = "tatweel"
\chardef\D=10 % dual-joiner class
\chardef\L=11 % lam
\chardef\R=12 % right-joiner
\chardef\A=13 % alef
\chardef\V=256 % vowel or other combining mark (to be ignored)
\def\kashida{\zwj\nobreak \setbox0=\hbox{\ksh}%
\leaders\hrule height\ht0 \hskip0pt plus 0.5em \zwj}
\def\setclass#1#2{\def\theclass{#1}\def\charlist{#2}%
\expandafter\dosetclass\charlist,\end}
\def\dosetclass#1,#2\end{%
\def\test{#1}\def\charlist{#2}%
\ifx\test\empty\let\next\finishsetclass
\else \XeTeXcharclass "\test = \theclass
\let\next\dosetclass \fi
\expandafter\next\charlist,,\end}
\def\finishsetclass#1,,\end{}
%% code for Melthofonts = Syriac fonts
\setclass \A {710}
\setclass \R {0715,0717,0718,0721,0728,072A,072C}
\setclass \D {0712,0713,071A,071B,071D,071F}
\setclass \D {0722,0723,0725,0729,072B}
\setclass \L {0720}
\setclass \V {0730,0731,0732,0733,0734,0735}
\setclass \V {0736,0737,0738,0739,073A,073B,073C}
\setclass \V {073D,073E,073F,0740,0741,0742,0743}
\setclass \V {0744,0745,0746,0747,0748}
% JK's code for Farsi fonts
\setclass \A {0622,0623,0625,0627}
\setclass \R {0624,0629,062F,0630,0631,0632,0648,0698}
\setclass \D {0626,0628,062A,062B,062C,062D,062E}
\setclass \D {0633,0634,0635,0636,0637,0638,0639,063A}
\setclass \D {0640,0641,0642,0643,0645,0646,0647,0649,064A}
\setclass \D {067E,0686,06A9,06AF,06CC}
\setclass \L {0644}
\setclass \V {064B,064C,064D,064E,064F,0650,0651,0652}
\XeTeXinterchartoks \D \D = {\kashida}
\XeTeXinterchartoks \L \D = {\kashida}
\XeTeXinterchartoks \D \L = {\kashida}
\XeTeXinterchartoks \L \L = {\kashida}
\XeTeXinterchartoks \D \R = {\kashida}
\XeTeXinterchartoks \D \A = {\kashida}
\XeTeXinterchartoks \L \R = {\kashida}
\XeTeXinterchartoks \L \A = {}
\XeTeXinterchartokenstate=1
\endinput
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