Hi Khaled,
I extended the font mechanism to deal with bidirectional math fonts in
such a way that we can have a mixed document (probably mostly usefull
for testing fonts). I've put a beta on the ftp server. Hopefully I
didn't mess up regular math too much.
% example from the xits suite
% \setupbodyfont[xits]
\setupbodyfont[xitsbidi]
\setupalign[r2l]
\starttext
\setupmathematics[align=r2l]
\startformula
\sqrt{ف^2\over 4ب} \eqno(1)
\stopformula
\setupmathematics[align=l2r]
\startformula
\sqrt{x^2\over 4x} \eqno(1)
\stopformula
\stoptext
The magic is in defining the font i.e. a typescript needs to define it.
In font-otf I patched the definition:
\starttypescript [math] [xits,xitsbidi] [name]
\definefontsynonym[MathRoman]
[\s!file:xits-math.otf][\s!features=\s!math\mathsizesuffix,\s!goodies=xits-math]
\definefontsynonym[MathRomanL2R][\s!file:xits-math.otf][\s!features=\s!math\mathsizesuffix-l2r,\s!goodies=xits-math]
\definefontsynonym[MathRomanR2L][\s!file:xits-math.otf][\s!features=\s!math\mathsizesuffix-r2l,\s!goodies=xits-math]
\stoptypescript
There are some extra predefined featuresets. The R2L and L2R names are
just symbolic and used here:
\definebodyfont [default] [mm]
[mr=MathRoman mo 1,
mrlr=MathRomanL2R mo 1,
mrrl=MathRomanR2L mo 1]
Now, bidi is explicitly enabled by setting the direction parameter:
\starttypescript[xitsbidi]
\definetypeface [xitsbidi] [rm] [\s!serif] [xits] [\s!default]
\definetypeface [xitsbidi] [ss] [\s!sans] [heros]
[\s!default] [\s!rscale=0.9]
\definetypeface [xitsbidi] [tt] [\s!mono] [modern]
[\s!default] [\s!rscale=1.05]
%definetypeface [xitsbidi] [mm] [\s!math] [xitsbidi] [bidi]
[\s!direction=\s!both]
\definetypeface [xitsbidi] [mm] [\s!math] [xitsbidi]
[\s!default] [\s!direction=\s!both]
\stoptypescript
Maybe at some point we can just default to bidi for xits.
Hans
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
| www.pragma-pod.nl
-----------------------------------------------------------------
_______________________________________________
dev-context mailing list
dev-context@ntg.nl
http://www.ntg.nl/mailman/listinfo/dev-context
