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%D \module
%D [ file=math-del,
%D version=2007.07.19,
%D title=\CONTEXT\ Math Macros,
%D subtitle=Delimiters,
%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.
\writestatus{loading}{ConTeXt Math Macros / Delimiters}
\unprotect
%D \macros
%D {checkdelimiters, fakeleftdelimiter, fakerightdelimiter}
%D
%D Handy for non matching situations (as with mathml):
%D
%D \starttyping
%D \checkdelimiters{... bla bla ...}
%D \fakeleftdelimiter
%D ... bla bla ...
%D \fakerightdelimiter
%D \stoptyping
\newcount\delimitercount
\def\leftfakedelimiter {\advance\delimitercount\minusone\gobbleoneargument}%
\def\rightfakedelimiter{\advance\delimitercount\plusone \gobbleoneargument}%
\def\checkdelimiters#1%
{\delimitercount\zerocount
\setbox\scratchbox\hbox\bgroup
\let\left \leftfakedelimiter
\let\right\rightfakedelimiter
$#1\expandafter$\expandafter
\egroup
\expandafter\delimitercount\the\delimitercount\relax}
\def\fakeleftdelimiter {\ifnum\delimitercount>\zerocount\left .\fi}
\def\fakerightdelimiter{\ifnum\delimitercount<\zerocount\right.\fi}
%D The following macros are used in the MathML interpreter, so
%D there is a good change of them never being documented for
%D other usage.
\let\normalordelimiter\secondoftwoarguments
\let\normalorfiller \firstoftwoarguments
\def\enabledelimiter {\let\normalordelimiter\secondoftwoarguments}
\def\disabledelimiter{\let\normalordelimiter\firstoftwoarguments}
\def\enablefiller {\let\normalorfiller\secondoftwoarguments}
\def\disablefiller {\let\normalorfiller\firstoftwoarguments}
\def\mathopnolimits#1{\mathop{\mr#1}\nolimits} % was \rm, which follows text fonts (used in mml parser)
\def\mathopdolimits#1{\mathop{\mr#1}} % was \rm, which follows text fonts (used in mml parser)
\protect \endinput
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