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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 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 / Delimiters}
\unprotect
%D Old code that will be redone:
%D
%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
% Actually we can do better now with lua hacks.
\newcount\c_math_delimiter_nesting
\def\leftfakedelimiter {\advance\c_math_delimiter_nesting\minusone\gobbleoneargument}
\def\rightfakedelimiter{\advance\c_math_delimiter_nesting\plusone \gobbleoneargument}
\def\checkdelimiters#1%
{\c_math_delimiter_nesting\zerocount
\setbox\scratchbox\hbox\bgroup
\let\left \leftfakedelimiter
\let\right\rightfakedelimiter
\normalstartimath#1\expandafter\normalstopimath\expandafter
\egroup
\expandafter\c_math_delimiter_nesting\the\c_math_delimiter_nesting\relax}
\def\fakeleftdelimiter {\ifnum\c_math_delimiter_nesting>\zerocount\left .\fi}
\def\fakerightdelimiter{\ifnum\c_math_delimiter_nesting<\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
\unexpanded\def\enabledelimiter {\let\normalordelimiter\secondoftwoarguments}
\unexpanded\def\disabledelimiter{\let\normalordelimiter\firstoftwoarguments}
\unexpanded\def\enablefiller {\let\normalorfiller\secondoftwoarguments}
\unexpanded\def\disablefiller {\let\normalorfiller\firstoftwoarguments}
% \def\mathopnolimits#1{\mathop{\mr\mathrm#1}\nolimits} % was \rm, which follows text fonts (used in mml parser)
% \def\mathopdolimits#1{\mathop{\mr\mathrm#1}} % was \rm, which follows text fonts (used in mml parser)
\def\mathopnolimits#1{\mathop{\mathrm#1}\nolimits} % was \rm, which follows text fonts (used in mml parser, check!)
\def\mathopdolimits#1{\mathop{\mathrm#1}} % was \rm, which follows text fonts (used in mml parser, check!)
% A new experiment:
\installcorenamespace {mathextensible}
\installcommandhandler \??mathextensible {mathextensible} \??mathextensible
\let\setupmathextensibles\setupmathextensible
\setupmathextensibles
[\c!symbol=0,
\c!command=\v!yes,
\c!factor=1.5,
\c!axis=\v!yes,
% \c!exact=\v!yes
\c!height=\exheight,
\c!depth=\exheight]
\appendtoks
\edef\p_command{\mathextensibleparameter\c!command}%
\ifx\p_command\v!yes
\setuevalue\currentmathextensible{\math_fenced_extensible[\currentmathextensible]}%
\fi
\to \everydefinemathextensible
\unexpanded\def\math_fenced_extensible
{\dodoubleempty\math_fenced_extensible_indeed}
\unexpanded\def\math_fenced_extensible_indeed[#1][#2]%
{\mathop
{\edef\currentmathextensible{#1}%
\edef\p_factor{\mathextensibleparameter\c!factor}%
\ifsecondargument
\doifassignmentelse{#2}
{\setupcurrentmathextensible[#2]%
\edef\p_factor{\mathextensibleparameter\c!factor}}%
{\edef\p_factor{#2}}%
\else
\edef\p_factor{\mathextensibleparameter\c!factor}%
\fi
\edef\p_exact{\mathextensibleparameter\c!exact}%
\edef\p_axis {\mathextensibleparameter\c!axis}%
\edef\p_leftoffset{\mathextensibleparameter\c!leftoffset}%
\edef\p_rightoffset{\mathextensibleparameter\c!rightoffset}%
\ifx\p_leftoffset\empty\else
\mskip\p_leftoffset
\fi
\Uvextensible
\ifx\p_exact\v!yes exact \fi
\ifx\p_axis \v!yes axis \fi
height \p_factor\dimexpr\mathextensibleparameter\c!height\relax
depth \p_factor\dimexpr\mathextensibleparameter\c!depth \relax
\Udelimiter\zerocount\zerocount\mathextensibleparameter\c!symbol
\relax
\ifx\p_rightoffset\empty\else
\mskip\p_rightoffset
\fi}}
\let\mathextensible\math_fenced_extensible
\definemathextensible[integral][\c!symbol="222B]
% \setupmathextensible[integral][rightoffset=-3mu,exact=yes,factor=2]
%
% \let\inlineint \int
% \let\displayint\integral
%
% \unexpanded\def\int{\ifmmode\inlineordisplaymath\inlineint\displayint\else\normalint\fi}
%
% \startlines
% \ruledhbox{$\integral f\frac{1}{2}$}
% \ruledhbox{$\integral[factor=1] f\frac{1}{2}$}
% \ruledhbox{$\integral[factor=3] f\frac{1}{2}$}
% \ruledhbox{$\int f\frac{1}{2}$}
% \stoplines
\unexpanded\def\autointegral#1#2#3%
{\ifmmode
\setbox\nextbox\mathstylehbox{#3}%
\scratchdimen\ifdim\nextboxht>\nextboxdp\nextboxht\else\nextboxdp\fi
\mathlimop{%
\Uvextensible
height \scratchdimen
depth \scratchdimen
exact%
axis%
\Udelimiter \plusfour \zerocount "222B%
}%
\limits % nolimits needs more work: kerning and so
\normalsuperscript{#1}%
\normalsubscript{#2}%
\box\nextbox
\else
\char"222B\relax
\fi}
% \startformula
% a =
% \autointegral{t}{b}1 +
% \autointegral{t}{b}{\frac{\frac{3}{4}}{\frac{1}{2}}} +
% \autointegral{t}{b}{\frac{\frac{\frac{\frac{1}{2}}{2}}{2}}{2}}
% \stopformula
\protect \endinput
|
