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%D \module
%D [ file=meta-tex,
%D version=2006.06.07,
%D title=\CONTEXT\ Support Macros,
%D subtitle=\METAPOST\ fast text insertion,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright=\PRAGMA]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
\registerctxluafile{meta-tex}{1.001}
\unprotect
% Ok, we support this in MkIV because Mojca kept the pressure on. It
% looks a bit like a hack.
\long\def\startTeXtexts#1\stopTeXtexts
{#1}
\long\def\TeXtext
{\dosingleempty\doTeXtext}
\long\def\doTeXtext[#1]#2#3% contrary to mkii we don't process yet but we do expand
{\long\setxvalue{@@st@@::#2}{\noexpand\dodoTeXtext{#1}{#3}}}
\long\def\dodoTeXtext#1#2%
{\begingroup
\setbox\nextbox\hbox{\executeifdefined{textext@@#1}\firstofoneargument{#2}}%
\executeifdefined{textext::#1}{\getvalue{textext::depth}}%
\box\nextbox
\endgroup}
\def\getTeXtext#1%
{\getvalue{@@st@@::#1}}
\setvalue{textext::d}{\setbox\nextbox\hbox{\lower\dp\nextbox\box\nextbox}} % unchecked
\setvalue{textext::n}{} % unchecked
\setvalue {textext::depth}{\getvalue{textext::d}}
\setvalue{textext::nodepth}{\getvalue{textext::n}}
% \definetextext[framed]{\framed}
%
% \startMPcode
% draw \sometxt[framed]{black} rotated 45 ;
% \stopMPcode
% \unexpanded\def\definetextext[#1]#2{\setvalue{@@st@@[#1]}{#2}\setvalue{@@st@@[#1] }{#2}} % we don't grab spaces after [#1]
% \long\def\sometxt #1#{\dosometxt{#1}} % grab optional [args]
% \long\def\dosometxt #1#2{textext.drt("\ifcsname @@st@@#1\endcsname\csname @@st@@#1\endcsname{#2}\else#2\fi")}
% But Mojca wanted more! Two arguments.
%
% \definetextext[framed]{\framed}
%
% \startMPcode
% draw \sometxt{This is for} rotated 45 ;
% draw \sometxt[framed][ss,16pt]{Mojca's};
% draw \sometxt[framed]{eyes only!} rotated -45 ;
% \stopMPcode
% a tex one:
%
% \unexpanded\def\definetextext [#1]#2{\setvalue{@@st@@#1}{#2}}
% \def\sometxt #1#{\dosometxt{#1}}
% \def\dosometxt #1#2{textext.drt("\dodosometxt#1{#2}")}
%
% \unexpanded\def\dodosometxt {\doifnextoptionalelse\dododosometxt\relax}
% \def\dododosometxt [#1]{\dodododosometxt{#1}}
% \def\dodododosometxt #1{\doifnextoptionalelse{\dododododosometxt{#1}}{\getsometxt{#1}}}
% \def\dododododosometxt #1[#2]{\switchtobodyfont[#2]\getsometxt{#1}}
% \def\getsometxt #1#2{\csname @@st@@#1\endcsname{#2}}
%
% or:
%
% \unexpanded\def\dodosometxt {\dodoubleempty\dododosometxt}
% \def\dododosometxt {\ifsecondargument
% \expandafter\dododosometxtA
% \else\iffirstargument
% \expandafter\expandafter\expandafter\dododosometxtB
% \else
% \expandafter\expandafter\expandafter\dododosometxtC
% \fi\fi}
% \def\dododosometxtA[#1][#2]#3{\getsometxt{#1}{\switchtobodyfont[#2]#3}}
% \def\dododosometxtB[#1][#2]#3{\getsometxt{#1}{#3}}
% \def\dododosometxtC[#1][#2]#3{#3}
% \def\getsometxt #1#2{\csname @@st@@#1\endcsname{#2}}
%
% a nicer variant:
\unexpanded\def\definetextext[#1]%
{\def\currenttextext{#1}%
\dosingleempty\dodefinetextext}
\def\dodefinetextext
{\iffirstargument
\expandafter\dodefinetextextone
\else
\expandafter\dodefinetextextzero
\fi}
\def\dodefinetextextone {\setvalue{@@st@@one\currenttextext}}
\def\dodefinetextextzero[#1]{\setvalue{@@st@@zero\currenttextext}}
\def\sometxt#1#%
{\dosometxt{#1}}
\def\dosometxt#1#2% we need to capture embedded quotes (a bit messy as later on textext is filtered
{textext.drt("\dodosometxt#1{\ctxlua{metapost.escaped(\!!bs#2\!!es)}}")}
\unexpanded\def\dodosometxt
{\dosingleempty\dododosometxt}
\def\dododosometxt
{\iffirstargument
\expandafter\dosometxtsome
\else
\expandafter\dosometxtzero
\fi}
\def\dosometxtsome[#1]%
{\def\currenttextext{#1}%
\csname @@st@@%
\ifcsname @@st@@one#1\endcsname one\else
\ifcsname @@st@@zero#1\endcsname zero\else
none\fi\fi
\endcsname}
\def\dosometxtzero[#1]%
{}
\def\@@st@@one {\dosingleempty\do@@st@@one}
\def\do@@st@@one{\csname @@st@@one\currenttextext\endcsname}
\def\@@st@@zero {\csname @@st@@zero\currenttextext\endcsname}
\def\@@st@@none {}
% \definetextext[framed][#1]#2{\framed[width=4cm]{\switchtobodyfont[#1]#2}}
% \definetextext[simple]{\framed[width=8cm]}
%
% \starttext
%
% \startMPcode
% draw \sometxt{This is for} rotated 45 ;
% draw \sometxt [framed] [ss,16pt] {Mojca's};
% draw \sometxt[framed]{eyes only!} rotated -45 ;
% draw \sometxt[simple]{Quotes "indeed" work!} rotated 180 ;
% \stopMPcode
%
% \stoptext
%
% a lua one:
%
% \unexpanded\def\definetextext[#1]#2{\setvalue{@@st@@#1}{#2}}
%
% \long\def\sometxt #1#{\dosometxt{#1}} % grab optional [args]
% \long\def\dosometxt #1#2{\ctxlua{metapost.sometxt(\!!bs#1\!!es,\!!bs#2\!!es)}}
%
% \def\sometxta #1{textext.drt("#1")}
% \def\sometxtb #1#2{textext.drt("\getvalue{@@st@@#1}{#2}")}
% \def\sometxtc #1#2#3{textext.drt("\getvalue{@@st@@#1}{\switchtobodyfont[#2]#3}")}
% Best use the mp macro instead since it provides positioning.
%
% \startuseMPgraphic{testgraphic}
% draw \sometxt{\ruledhbox{\strut hans hagen}} scaled 3;
% % draw textext.drt("\ruledhbox{\strut hans hagen}") scaled 3;
% % draw textext.dlft("\ruledhbox{\strut hans hagen}") scaled 3;
% % draw textext.lft("\ruledhbox{\strut hans hagen}") scaled 3;
% draw llcorner currentpicture -- urcorner currentpicture withcolor yellow;
% draw lrcorner currentpicture -- ulcorner currentpicture withcolor yellow;
% draw boundingbox currentpicture withcolor blue ;
% draw origin withcolor red withpen pencircle scaled 1pt;
% \stopuseMPgraphic
%
% {\showstruts\useMPgraphic{testgraphic}}
\protect \endinput
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