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%D \module
%D [ file=pack-rul, % was core-rul,
%D version=2022.02.23,
%D title=\CONTEXT\ Packaging Macros,
%D subtitle=Ruled Math,
%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 Packaging Macros / Ruled Math}
%D This is a by product of the math improvement activity by Mikael Sundqvist and
%D myself. More might end up here and more control might be added.
\unprotect
\newconditional \c_framed_math_framed
\installtextracker
{framed.math}
{\settrue \c_framed_math_framed}
{\setfalse\c_framed_math_framed}
\tolerant\protected\def\mathframed[#1]#:#2%
{\begingroup
\ifconditional\c_framed_math_framed
\defineboxanchor[temp]%
\fi
\setmathatomrule\mathbegincode\mathbincode\allmathstyles\mathbegincode\mathbincode % hm
\normalexpanded
{\setbox\scratchbox\hpack
\ifconditional\c_framed_math_framed
\s!source \namedboxanchor{temp}
\fi
\s!ymove \Umathaxis\Ustyle\mathstyle
\bgroup
\framed
[\c!location=\v!middle,#1]
{\startimath
\Ustyle\mathstyle
#2%
\stopimath}%
\egroup}%
\scratchcounterone\lastleftclass
\scratchcountertwo\lastrightclass
% \writestatus{!!}{[\number\lastleftclass,\number\lastrightclass]}%
\mathatom
\s!class \mathexplicitcode
\ifnum\scratchcounterone<\zerocount\else\s!leftclass \scratchcounterone\fi
\ifnum\scratchcountertwo<\zerocount\else\s!rightclass\scratchcountertwo\fi
\bgroup
\ifconditional\c_framed_math_framed
\setboxanchor[temp][\c!corner={\v!left,\v!bottom},\c!location={\v!right,\v!height}]
\hpack{\smallinfofont \the\scratchcounterone}%
\setboxanchor[temp][\c!corner={\v!right,\v!bottom},\c!location={\v!left,\v!height}]
\hpack{\smallinfofont \the\scratchcountertwo}%
\fi
\box\scratchbox
\egroup
\endgroup}
%D \starttyping
%D \enabletrackers[framed.math]
%D
%D \startTEXpage[offset=10pt,width=40dk]
%D \showmakeup[mathglue]
%D \def\MyTest#1%
%D {$ x #1 x $\quad
%D $ x \mathframed[offset=0pt]{#1} x $\quad
%D $\displaystyle x #1 x $\quad
%D $\displaystyle x \mathframed[offset=0pt]{#1} x $}
%D \MyTest{>}\blank
%D \MyTest{+}\blank
%D \MyTest{!}\blank
%D \MyTest{+\frac{1}{2}+}\blank
%D \MyTest{\frac{1}{2}}\blank
%D \stopTEXpage
%D \stoptyping
%D From the list:
%D \starttyping
%D \startformula[spaceinbetween=.5\lineheight]
%D \left\{
%D \mparagraph{Quaternion algebras\par over $\blackboard{Q}$ up to isomorphism}
%D \right\}
%D \alignhere \leftrightarrow
%D \left\{
%D \mparagraph
%D [foregroundcolor=darkred,offset=.1ex,frame=on]
%D {Finite subset of places of $\blackboard{Q}$\par of even cardinality}
%D \right\}
%D \breakhere \leftrightarrow
%D \left\{
%D \mparagraph{more text}
%D \right\}
%D \breakhere \leftrightarrow
%D \left\{
%D \mparagraph[foregroundcolor=darkblue]{and more text}
%D \right\}
%D \stopformula
%D \stoptyping
\permanent\tolerant\protected\def\mparagraph[#1]#*#:#2%
{\vcenter class \mathconstructcode \bgroup % \mathwrappedcode would be like fraction
\framed[\c!offset=\v!overlay,\c!frame=\v!overlay,\c!align=\v!middle,#1]{#2}%
\egroup}
%D Moved from pack-rul.mkxl to here:
%D \macros
%D {mframed, minframed}
%D
%D See mkii and mkiv files for some history on this already rather old mechanism; it
%D dates from the real beginning. In the meantime we used anchoring, and now we're
%D doing it more \LMTX ish.
% mframed xx\mframed {x^2 + \frac{2}{x} + \sqrt{\frac{2}{\sqrt{\frac{2}{x}}}}} \input tufte
% inmframed xx\inmframed{x^2 + \frac{2}{x} + \sqrt{\frac{2}{\sqrt{\frac{2}{x}}}}} \input tufte
% mcframed xx\mcframed {x^2 + \frac{2}{x} + \sqrt{\frac{2}{\sqrt{\frac{2}{x}}}}} \input tufte
% mtframed xx\mtframed {x^2 + \frac{2}{x} + \sqrt{\frac{2}{\sqrt{\frac{2}{x}}}}} \input tufte
\newcount\c_framed_mstyle
\installcorenamespace{mathframed}
\installframedcommandhandler \??mathframed {mathframed} \??mathframed
\newtoks \t_pack_framed_mathframed
\newdimen\d_pack_framed_mathframed
\appendtoks
\frozen\protected\instance\edefcsname\currentmathframed\endcsname{\pack_framed_mathframed[\currentmathframed]}%
\to \everydefinemathframed
\tolerant\protected\def\pack_framed_mathframed[#1]#*[#2]#:#3% needs testing !
{\begingroup
\edef\currentmathframed{#1}%
\setupcurrentmathframed[#2]%
\c_framed_mstyle\normalmathstyle
\edef\m_framed_location{\mathframedparameter\c!location}%
\ifx\m_framed_location\v!mathematics
\inheritedmathframedframed\bgroup
\setbox\scratchbox\hbox\bgroup
\Ustartmath
\triggermathstyle\c_framed_mstyle
\the\t_pack_framed_mathframed
\mathatom \mathunspacedcode\bgroup
#3%
\egroup
\Ustopmath
\egroup
\global\d_pack_framed_mathframed\dp\scratchbox
\dontleavehmode\box\scratchbox
\egroup
\else
\inheritedmathframedframed\bgroup
\hbox\bgroup
\Ustartmath
\triggermathstyle\c_framed_mstyle
#3%
\Ustopmath
\egroup
\egroup
\fi
\endgroup}
\appendtoks
\c_strc_math_ragged_status \plustwo
\c_strc_formulas_check_width\zerocount
\to \t_pack_framed_mathframed
\installframedlocator \v!mathematics
{}
{\pack_framed_locator_set_lo
\ifzeropt\d_framed_locator_lo\else
\lower\dimexpr\d_framed_locator_lo+\d_pack_framed_mathframed\relax
\fi
\box\b_framed_normal}
\definemathframed[mframed]
\definemathframed[inmframed][\c!location=\v!low]
\definemathframed[mcframed] [\c!location=\v!mathematics] % centered
\definemathframed[mtframed] [\c!location=\v!mathematics,\c!offset=\v!overlay,\c!frame=\v!overlay] % tight
%D So instead of the rather versatile \type {\framed}, we use \type {\mframed}:
%D
%D \startbuffer
%D \startformula
%D x \times \mframed{y} \times y^{z_z}
%D x \times \inmframed{y} \times y^{z_z}
%D \stopformula
%D \stopbuffer
%D
%D \typebuffer \getbuffer
%D
%D And:
%D
%D \startbuffer
%D \startformula
%D x \times \mframed{y} \times y^{\mframed{z}_{\mframed{z}}}
%D \stopformula
%D \stopbuffer
%D
%D \typebuffer \getbuffer
%D
%D As usual, one can specify in what way the text should be framed. One should be
%D aware of the fact that, inorder to preserve the proper spacing, the \type
%D {offset} is set to \type {overlay} and \type {frameoffset} is used used instead.
%D
%D \startbuffer
%D \startformula
%D x \times y^{\mframed[framecolor=red]{z}_{z}}
%D \stopformula
%D \stopbuffer
%D
%D \typebuffer \getbuffer
%D
%D For inline use, we also provide the \type {\inmframed} alternative: we want $x
%D \times \inmframed{y}$ in inline math, right?
\protect
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