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Diffstat (limited to 'tex/context/base/mkiv/typo-dir.mkiv')
-rw-r--r-- | tex/context/base/mkiv/typo-dir.mkiv | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/tex/context/base/mkiv/typo-dir.mkiv b/tex/context/base/mkiv/typo-dir.mkiv new file mode 100644 index 000000000..7290c8313 --- /dev/null +++ b/tex/context/base/mkiv/typo-dir.mkiv @@ -0,0 +1,194 @@ +%D \module +%D [ file=typo-dir, +%D version=2009.03.27, % code moved from core-spa.mkiv +%D title=\CONTEXT\ Typesetting Macros, +%D subtitle=Directions, +%D author=Hans Hagen, +%D date=\currentdate, +%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}] +%C +%C This module is part of the \CONTEXT\ macro||package and is +%C therefore copyrighted by \PRAGMA. See mreadme.pdf for +%C details. + +\writestatus{loading}{ConTeXt Typesetting Macros / Directions} + +%D At some point we might default to method 'two' but first I need to make it more +%D efficient (and provide some options). I also want to have some basic tracing. + +\unprotect + +\registerctxluafile{typo-dir}{1.001} +\registerctxluafile{typo-dha}{1.001} +\registerctxluafile{typo-dua}{1.001} +\registerctxluafile{typo-dub}{1.001} + +\definesystemattribute[directions][public] + +\installcorenamespace{directions} +\installcorenamespace{directionsbidimode} + +% plural as we can have a combination but maybe better singular + +\installsimplecommandhandler \??directions {directions} \??directions % no \define... yet + +\edef\lefttorightmark{\normalUchar"200E} \let\lrm\lefttorightmark +\edef\righttoleftmark{\normalUchar"200F} \let\rlm\righttoleftmark + +\unexpanded\def\setdirection[#1]% todo: symbolic names + {\clf_setdirection#1\relax} + +% \unexpanded\def\resetdirection +% {\clf_setdirection\zerocount} +% +% is in fact: + +\unexpanded\def\resetdirection + {\attribute\directionsattribute\attributeunsetvalue} + +\newconstant\directionsbidimode % this one might become pivate + +% \setupdirections[bidi=global,method=default] +% \setupdirections[bidi=global,method=one] +% \setupdirections[bidi=global,method=two] +% \setupdirections[bidi=global,method=two,fences=no] + +% maybe use chardefs + +\def\typo_dir_get_mode + {\def\currentbidimode{\clf_getbidimode + scope {\directionsparameter\c!bidi}% + method {\directionsparameter\c!method}% + fences {\directionsparameter\c!fences}% + }% + \expandafter\glet\csname\??directionsbidimode\currentbidistamp\endcsname\currentbidimode} + +\appendtoks + \edef\currentbidistamp + {\directionsparameter\c!bidi + :\directionsparameter\c!method + :\directionsparameter\c!fences}% + \expandafter\let\expandafter\currentbidimode\csname\??directionsbidimode\currentbidistamp\endcsname + \ifx\currentbidimode\relax + \typo_dir_get_mode + \fi + \directionsbidimode\currentbidimode\relax + \ifcase\directionsbidimode + \resetdirection + \else + \setdirection[\number\directionsbidimode]% + \fi +\to \everysetupdirections + +% bidi: local=obey grouping, global=ignore grouping (unicode has no grouping) + +\setupdirections % maybe start/stop + [\c!bidi=\v!off, + \c!method=\v!default, + \c!fences=\v!yes] + +\unexpanded\edef\bidilre{\normalUchar"202A} % maybe \edef's +\unexpanded\edef\bidirle{\normalUchar"202B} +\unexpanded\edef\bidipop{\normalUchar"202C} +\unexpanded\edef\bidilro{\normalUchar"202D} +\unexpanded\edef\bidirlo{\normalUchar"202E} + +\unexpanded\def\dirlre{\ifcase\directionsbidimode\or\bidilre\or\textdir TLT\fi} +\unexpanded\def\dirrle{\ifcase\directionsbidimode\or\bidirle\or\textdir TRT\fi} +\unexpanded\def\dirlro{\ifcase\directionsbidimode\or\bidilro\or\setdirection[3]\fi} +\unexpanded\def\dirrlo{\ifcase\directionsbidimode\or\bidirlo\or\setdirection[4]\fi} + +% for the moment: \setdirection[\plusone] + +\definecolor[bidi:left:original] [r=.6] +\definecolor[bidi:left:reversed] [g=.6] +\definecolor[bidi:right:original][b=.6] +\definecolor[bidi:right:reversed][r=.6,g=.6] +\definecolor[bidi:mirrored] [r=.6,b=.6] + +\protect \endinput + +% bidi test + +\definefontfeature + [arab] + [mode=node,language=dflt,script=arab, + init=yes,medi=yes,fina=yes,isol=yes, + liga=yes,dlig=yes,rlig=yes,clig=yes, + mark=yes,mkmk=yes,kern=yes,curs=yes] + +\font\Arabic=arabtype*arab at 20pt + +\def\LATIN{LATIN} {\setdirection[1]} % enable this +\def\ARAB {محمد} + +\startluacode + function documentdata.split_tokens(str) + for s in str:bytes() do + context.sprint(tex.ctxcatcodes,string.format("\\hbox{\\char %s}",s)) + end + end +\stopluacode + +\def\biditest#1#2#3% font text raw + {\dontleavehmode\hbox + {\framed[offset=overlay]{\tttf#2}\quad + \enabletrackers[typesetters.directions]% + \framed[offset=overlay]{#1#3}\quad + \disabletrackers[typesetters.directions]% + \tttf\ctxlua{documentdata.split_tokens([[\detokenize{#3}]])}}} + +\startbuffer[bidi-sample] +\biditest\Arabic{LATIN BARA}{\textdir TLT\relax \LATIN\ \ARAB}\par +\biditest\Arabic{BARA LATIN}{\textdir TRT\relax \LATIN\ \ARAB}\par +\biditest\Arabic{LATIN ARAB}{\textdir TLT{\bidilro \LATIN\ \ARAB}}\par % right -> left +\biditest\Arabic{LATIN ARAB}{\textdir TRT{\bidilro \LATIN\ \ARAB}}\par % right -> left +\biditest\Arabic{BARA NITAL}{\textdir TLT{\bidirlo \LATIN\ \ARAB}}\par % left -> right +\biditest\Arabic{BARA NITAL}{\textdir TRT{\bidirlo \LATIN\ \ARAB}}\par % left -> right +\stopbuffer + +\startbuffer[bidi-sample] +\biditest\Arabic{LATIN BARA}{\textdir TLT\relax \LATIN\ \ARAB}\par +\biditest\Arabic{BARA LATIN}{\textdir TRT\relax \LATIN\ \ARAB}\par +\biditest\Arabic{LATIN ARAB}{\textdir TLT\bidilro \LATIN\ \ARAB}\par % right -> left +\biditest\Arabic{LATIN ARAB}{\textdir TRT\bidilro \LATIN\ \ARAB}\par % right -> left +\biditest\Arabic{BARA NITAL}{\textdir TLT\bidirlo \LATIN\ \ARAB}\par % left -> right +\biditest\Arabic{BARA NITAL}{\textdir TRT\bidirlo \LATIN\ \ARAB}\par % left -> right +\stopbuffer + +\startbuffer[bidi-setup] +\setupdirections[bidi=off] +\stopbuffer + +{\typebuffer[bidi-setup] \getbuffer[bidi-setup] \getbuffer[bidi-sample]} + +\startbuffer[bidi-setup] +\setupdirections[bidi=global] +\stopbuffer + +{\typebuffer[bidi-setup] \getbuffer[bidi-setup] \getbuffer[bidi-sample]} + +\startbuffer[bidi-setup] +\setupdirections[bidi=local] +\stopbuffer + +{\typebuffer[bidi-setup] \getbuffer[bidi-setup] \getbuffer[bidi-sample]} + +\startbuffer[bidi-sample] +\setupdirections[bidi=global] + + \hbox{\righttoleft\arabicfont (0001)}\par + \dontleavehmode\hbox{\righttoleft\arabicfont (0002)}\par + {\righttoleft\arabicfont (0003)\par} + {\righttoleft\arabicfont (0004)}\par + \dontleavehmode{\righttoleft\arabicfont (0005)\par} + \dontleavehmode{\righttoleft\arabicfont (0006)}\par + \rtlhbox{\arabicfont (0007)}\par + \ltrhbox{\arabicfont (0008)}\par +\dontleavehmode\rtlhbox{\arabicfont (0009)}\par +\dontleavehmode\ltrhbox{\arabicfont (0010)}\par +\stopsetups + +{\typebuffer[bidi-sample] \getbuffer[bidi-sample]} + +\stoptext |