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%D \module
%D [ file=math-del,
%D version=2022.07.29,
%D title=\CONTEXT\ Math Macros,
%D subtitle=delimiteds,
%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 Math Macros / Delimited}
\unprotect
%D This is a variant on radicals but in the end it was better to just define a new
%D environment for this. This is because we don't have the rule and we want a
%D different control over the spacing. We also don't want the degree.
% Todo: also add the mp plugin here but that more fun stuff for later (when we pick
% up school math).
\installcorenamespace{mathdelimited}
\installcorenamespace{mathdelimitedalternative}
\installcommandhandler \??mathdelimited {mathdelimited} \??mathdelimited
\setupmathdelimited
[\c!alternative=\v!normal,
\c!mpoffset=.25\exheight,
\c!topoffset=\zeropoint,
\c!bottomoffset=\zeropoint,
\c!height=\zeropoint,
\c!depth=\zeropoint,
\c!strut=\v!height,
\c!source=\zerocount,
\c!left=\zerocount,
\c!right=\zerocount,
\c!leftmargin=\zeropoint,
\c!rightmargin=\zeropoint]
\appendtoks
\frozen\protected\instance\edefcsname\currentmathdelimited\endcsname{\math_delimited_handle{\currentmathdelimited}}
\to \everydefinemathdelimited
\mutable\let\currentmathdelimited\empty
\tolerant\protected\def\math_delimited_handle#tag#*[#settings]#:#body%
{\begingroup
\edef\currentmathdelimited{#tag}%
\setupcurrentmathdelimited[#settings]%
\math_delimited_alternative{%
\begincsname\??mathwhateverstrut\mathdelimitedparameter\c!strut\endcsname
\scratchdimen\mathdelimitedparameter\c!leftmargin \relax\ifzeropt\scratchdimen\else\kern\scratchdimen\fi
#body%
\scratchdimen\mathdelimitedparameter\c!rightmargin\relax\ifzeropt\scratchdimen\else\kern\scratchdimen\fi
}%
\endgroup}
\def\math_delimited_alternative{\csname\??mathdelimitedalternative\mathdelimitedparameter\c!alternative\endcsname}
\protected\def\math_delimited_common
{\Udelimited
\s!height\dimexpr\mathdelimitedparameter\c!height+\mathdelimitedparameter\c!topoffset\relax
\s!depth \dimexpr\mathdelimitedparameter\c!depth+\mathdelimitedparameter\c!bottomoffset\relax
\s!source\numexpr\namedboxanchor{\mathdelimitedparameter\c!source}\relax
\s!style \normalmathstyle
\zerocount \mathdelimitedparameter\c!left
\zerocount \mathdelimitedparameter\c!right
\relax}
\defcsname\??mathdelimitedalternative\v!default\endcsname % #body%
{\math_delimited_common} % {#body}}
\defcsname\??mathdelimitedalternative\v!normal\endcsname#body%
{\edef\p_color{\mathdelimitedparameter\c!color}%
\ifempty\p_color
\math_delimited_common{#body}% {} really needed as \rootdelimited expands first
\else
\pushcolor[\p_color]%
\math_delimited_common
{\popcolor#body}%
\fi}
% todo:
%
% \setupmathdelimited
% [topoffset=.2\exheight]
%
% \definemathdelimited
% [fourier]
% [rule=no,
% left=\zerocount,
% right="FE944] % 46 48
%
% $ \autofences \fourier{(z+\frac12)} + \courier{(z+\frac12)} + \xourier{(z+\frac12)} $
\protect \endinput
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