%D \module
%D   [       file=char-ini,
%D        version=2006.08.20,
%D          title=\CONTEXT\ Character Support,
%D       subtitle=Initialization,
%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 Character Support / Initialization}

\registerctxluafile{char-fio}{}
\registerctxluafile{char-map}{} % maybe we will load this someplace else
\registerctxluafile{char-tex}{autosuffix}
\registerctxluafile{char-ent}{}
\registerctxluafile{char-scr}{}
%registerctxluafile{char-brl}{}

\unprotect

% ¨äëïöüÿ
% ´áćéíĺńóŕśúýź
% ˙ċėġiż
% ¯āēīōū
% ˝őű
% ˆâĉêĝĥîĵôŝûŵŷ
% `àèìòùỳ
% ¸çķļņŗşţ
% ˛ąęįų
% ˚åů
% ˘ăĕğĭŏŭ
% ˇčďěľňřšťž
% ˜ãĩñõũ

% \def\checkedchar#1% #2%
%   {\relax\iffontchar\font#1 \expandafter\firstoftwoarguments\else\expandafter\secondoftwoarguments\fi{\char#1}}
%
% impossible in math mode so there always fallback (till we have gyre):
%
% use \tocharacter when possible .. the next one is nice for documents and it also accepts
% 0x prefixed numbers

\permanent\def\utfchar #1{\clf_utfchar {#1}} % todo: define public at lua end
\permanent\def\safechar#1{\clf_safechar{#1}} % todo: define public at lua end

% This actually keeps the catcode and therefore the meaning of an active character too!

\permanent\protected\def\Ux #1{\tocharacter{"#1}} % used in xml (sometimes overloaded)
\permanent          \def\eUx#1{\tocharacter{"#1}} % used in xml (sometimes overloaded)

\permanent\def\expandUx{\enforced\let\Ux\eUx}

\permanent          \def\checkedchar        {\relax\ifmmode\expandafter\checkedmathchar\else\expandafter\checkedtextchar\fi} % #1#2
\permanent          \def\checkedmathchar#1#2{#2}
\permanent\protected\def\checkedtextchar  #1{\clf_doifelsecharinfont{#1}{\char#1}} % {#2}

\newconditional\prefermathovertextchar

\permanent\protected\def\textormathchar#1%
  {\begingroup
   \scratchcounter#1\relax
   \ifmmode
     \char\scratchcounter
   \else
      \ifconditional\prefermathovertextchar
        % dirty trick .. maybe let this adapt to bf too ?
        \setfontid\fontid\textfont\c_font_fam_mr
      \fi
      \iffontchar\font\scratchcounter
        \char\scratchcounter
      \else
        \normalstartimath\char\scratchcounter\normalstopimath
      \fi
   \fi
   \endgroup}

\permanent\protected\def\textormathchars#1%
  {{\font_text_or_mathchars#1\relax}}

\protected\def\font_text_or_mathchars#1#2\relax
  {\relax\ifmmode
     #1#2%
   \orelse\iffontchar\font`#1\relax
     #1#2\relax
   \else
     \normalstartimath#1#2\normalstopimath
   \fi}

%D The codes are stored in the format, so we don't need to reinitialize them (unless
%D of course we have adapted the table). It is on the agenda to do this with \type
%D {tex.lccode} cum suis once they're available.

% Is setting up vrb tpa and tpb needed?

% move to lua side

\clf_setlettercatcodes\texcatcodes
\clf_setlettercatcodes\ctxcatcodes
\clf_setlettercatcodes\notcatcodes
%clf_setlettercatcodes\mthcatcodes
\clf_setlettercatcodes\vrbcatcodes % hm ... we need to  hyphemate
\clf_setlettercatcodes\prtcatcodes
\clf_setlettercatcodes\tpacatcodes % hm
\clf_setlettercatcodes\tpbcatcodes % hm
\clf_setlettercatcodes\txtcatcodes

\clf_setothercatcodes \rlncatcodes

\clf_setactivecatcodes\ctxcatcodes
\clf_setactivecatcodes\notcatcodes
\clf_setactivecatcodes\prtcatcodes

\clf_setcharacternames\ctxcatcodes

\permanent\def\chardescription#1{\clf_chardescription#1\relax}

% experiment (watch out: this is global and very font dependent when used with
% casing mechanisms)
%
% \overloaduppercase{0xDF}{0x1E9E}}
% \overloaduppercase{0xDF}{0x53,0x53}

\permanent\protected\def\overloaduppercase{\clf_overloaduppercase} % todo: define public at lua end
\permanent\protected\def\overloadlowercase{\clf_overloadlowercase} % todo: define public at lua end

%D For old times sake (for now), for Thomas Schmitz (\type {\greekdasiavaria} etc):

\permanent\protected\def\addcharacternames{\ctxlua{characters.addcharacternames()}} % we could be granular e.g. 'greek'

% \greekdasiavaria

\protect \endinput