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%D \module
%D [ file=math-inl,
%D version=2008.10.20,
%D title=\CONTEXT\ Math Macros,
%D subtitle=Inline,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright=PRAGMA-ADE / Hans Hagen]
%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 / Inline}
\unprotect
%D \macros
%D {...}
%D
%D New and experimental: snapping big inline math!
\newconditional\halfcrazymathlines % \settrue\halfcrazymathlines
\newconditional\crazymathsnapping % \settrue\crazymathsnapping
\appendtoks
\doifelse\@@mtgrid\v!yes \settrue\setfalse\crazymathsnapping
\doifelse\@@mtstep\v!halfline\settrue\setfalse\halfcrazymathlines
\to \everysetuptextformulas
\setuptextformulas
[\c!grid=\v!yes,
\c!step=\v!line]
\newcount\crazymathhack
\let\lastcrazymathline \!!zeropoint
\let\lastcrazymathpage \!!zerocount
\let\lastcrazymathprelines \!!zerocount
\let\lastcrazymathpostlines\!!zerocount
\def\crazymathtag{amh:\the\crazymathhack}
\def\crazytexttag{\v!text:\lastcrazymathpage}
\def\crazymathindent{\hskip\MPx\crazymathtag\hskip-\MPx\crazytexttag}
\def\flushcrazymathbox
{\nextboxht\strutheight
\nextboxdp\strutdepth
\hbox{\iftracegridsnapping\ruledhbox\fi{\flushnextbox}}}
\def\snappedinlineformula
{\dosingleempty\dosnappedinlineformula}
%D \starttabulate[|Tl|l|]
%D \NC - \NC half lines \NC \NR
%D \NC + \NC full lines \NC \NR
%D \NC = \NC force \NC \NR
%D \NC < \NC force, minus pre \NC \NR
%D \NC > \NC force, minus post \NC \NR
%D \stoptabulate
\def\inlinemathmargin{1pt}
\settrue\autocrazymathsnapping
% FROM NOW ON, CHANGES AS OPTIONS
% TODO: SKYLINE (PREV LINE POS SCAN)
% we can rewrite this in lua but maybe we don't need it
% any more when we have proper snapping anyway
\def\dosnappedinlineformula[#1]#2%
{\ifvmode\dontleavehmode\fi % tricky
\strut % prevents funny space at line break
\begingroup % interesting: \bgroup can make \vadjust disappear
\ifconditional\crazymathsnapping
\ifgridsnapping
\checktextbackgrounds % we need pos tracking, to be made less redundant
\donetrue
\else
\donefalse
\fi
\else
\donefalse
\fi
\!!doneafalse % forced or not auto
\!!donebfalse % too heigh
\!!donecfalse % too low
\!!donedfalse % less before
\!!doneefalse % less after
\ifdone
\setbox\nextbox\hbox{$#2$}%
\iftracegridsnapping
\setbox\nextbox\ruledhbox
{\incolortrue\localcolortrue
\backgroundline[gray]{\showstruts\strut\flushnextbox}}%
\fi
\def\docommand##1%
{\doif{##1}-{\settrue \halfcrazymathlines}%
\doif{##1}+{\setfalse\halfcrazymathlines}%
\doif{##1}={\!!doneatrue}%
\doif{##1}<{\!!donedtrue}%
\doif{##1}>{\!!doneetrue}}%
\processcommalist[#1]\docommand
\if!!doneb
\if!!donec \else
\setfalse\halfcrazymathlines
\fi
\else
\if!!donec
\setfalse\halfcrazymathlines
\fi
\fi
\donefalse
\if!!donea
\donetrue
\scratchdimen \nextboxht
\advance\scratchdimen .5\lineheight
\nextboxht\scratchdimen
\scratchdimen \nextboxdp
\advance\scratchdimen .5\lineheight
\nextboxdp\scratchdimen
\else\ifdim\nextboxht>\strutht
\donetrue
\else\ifdim\nextboxdp>\strutdp
\donetrue
\fi\fi\fi
\ifconditional\autocrazymathsnapping \else \if!!donea \else
% don't compensate, just snap to strut
\donefalse
% signal for next else, snap line to strut
\!!doneatrue
\fi \fi
\fi
\ifdone
% analyze height
\scratchdimen\inlinemathmargin
\advance\scratchdimen \strutht
\ifdim\nextboxht<\scratchdimen \else \!!donebtrue \fi
% analyze depth
\scratchdimen\inlinemathmargin
\advance\scratchdimen \strutdp
\ifdim\nextboxdp<\scratchdimen \else \!!donectrue \fi
% analyzed or forced
\ifdone
\global\advance\crazymathhack\plusone
\donefalse
\ifnum\MPp\crazymathtag=\lastcrazymathpage\relax
\ifdim\MPy\crazymathtag=\lastcrazymathline\relax
\donetrue
\fi
\fi
\ifnum\MPp\crazymathtag=\zerocount \donefalse \fi
\ifdim\MPy\crazymathtag=\zeropoint \donefalse \fi
\ifdone
% same page and same line
\else
\global\let\lastcrazymathprelines \!!zerocount
\global\let\lastcrazymathpostlines\!!zerocount
\xdef\lastcrazymathpage{\MPp\crazymathtag}%
\xdef\lastcrazymathline{\MPy\crazymathtag}%
\fi
\if!!doneb
% \getrawnoflines\nextboxht
\scratchdimen\nextboxht
\advance\scratchdimen-\strutht
\getnoflines\scratchdimen
\if!!doned \advance\noflines\minusone \fi
\scratchcounter\noflines
\advance\noflines-\lastcrazymathprelines\relax
\ifnum\noflines>\zerocount
\xdef\lastcrazymathprelines{\the\scratchcounter}%
\scratchdimen\noflines\lineheight
\ifconditional\halfcrazymathlines
\advance\scratchdimen-.5\lineheight
\fi
\advance\scratchdimen-\strutdepth
\setbox\scratchbox\null
\wd\scratchbox2\bodyfontsize
\ht\scratchbox\scratchdimen
\dp\scratchbox\strutdepth
%%% top correction code (see below)
\normalvadjust pre
{%\allowbreak % sometimes breaks spacing
\forgetall
\crazymathindent
\iftracegridsnapping
\setbox\scratchbox\hbox
{\incolortrue\localcolortrue\green
\ruledhbox{\box\scratchbox}}%
\fi
\box\scratchbox
\endgraf
\nobreak}%
\else\ifnum\scratchcounter>\zerocount
\normalvadjust pre
{\nobreak}%
\fi\fi
\fi
\if!!donec
% \getrawnoflines\nextboxdp
\scratchdimen\nextboxdp
\advance\scratchdimen-\strutdp
\getnoflines\scratchdimen
\if!!donee \advance\noflines\minusone \fi
\scratchcounter\noflines
\advance\noflines-\lastcrazymathpostlines\relax
\ifnum\noflines>\zerocount
\donetrue
\else\ifnum\lastcrazymathpostlines=\zerocount
\donetrue
\else
\donefalse
\fi\fi
\else
\donefalse
\fi
\ifdone
\xdef\lastcrazymathpostlines{\the\scratchcounter}%
\ifnum\lastcrazymathpostlines=\zerocount
\global\let\lastcrazymathpostlines\!!plusone
\fi
\hbox{\setposition\crazymathtag\flushcrazymathbox}%
\scratchdimen\noflines\lineheight
\advance\scratchdimen-\lineheight
\advance\scratchdimen+\strutheight
\ifdim\scratchdimen>\zeropoint \else
\scratchdimen\strutheight % todo : test for half lines
\fi
\ifconditional\halfcrazymathlines
\advance\scratchdimen-.5\lineheight
\fi
\setbox\scratchbox\null
\wd\scratchbox2\bodyfontsize
\ht\scratchbox\scratchdimen
\dp\scratchbox\strutdepth
\normalvadjust
{\forgetall
\crazymathindent
\iftracegridsnapping
\setbox\scratchbox\hbox
{\incolortrue\localcolortrue\color[blue]{\ruledhbox{\box\scratchbox}}}%
\fi
\box\scratchbox
\endgraf
% precaution: else we stick below the text bottom
\ifconditional\halfcrazymathlines
\allowbreak
\else
\vskip-\lineheight
\vskip \lineheight
\fi}%
\else
\hbox{\setposition\crazymathtag\flushcrazymathbox}%
\fi
\else
\flushcrazymathbox
\fi
\else\if!!donea
\flushcrazymathbox
\else
\mathematics{#2}%
\fi\fi
\endgroup}
\let\tform\mathematics
\let\gform\snappedinlineformula
% test set:
%
% \startbuffer
% Crazy math \gform {1+x} or \gform {\dorecurse {100} {1+} 1 =
% 101} and even gore crazy \gform {2^{2^2}_{1_1}}
% again\dorecurse {20} { and again} \gform {\sqrt {\frac
% {x^{5^5}} {\frac {1} {2}}}} even gore\dorecurse {50} { and
% gore} \tform {\dorecurse {12} {\gform {\sqrt {\frac
% {x^{5^5}} {3}}}+\gform {\sqrt {\frac {x^{5^5}} {\frac {1}
% {2}}}}+}x=10}\dorecurse{20} { super crazy math}: \tform
% {\dorecurse {30} {\gform {\sqrt {\frac {x^{5^5}} {3}}}+
% \gform {\sqrt {\frac {x^{5^5}} {\frac {1} {2}}}}+ }x = 10},
% and we're\dorecurse {20} { done}!
% \stopbuffer
%
% \setupcolors[state=start] \setuppapersize[S6][S6]
%
% \showgrid \tracegridsnappingtrue \showstruts
%
% \starttext
% \setuplayout[grid=yes,lines=15]\getbuffer \page
% \setuplayout[grid=yes,lines=16]\getbuffer \page
% \setuplayout[grid=yes,lines=17]\getbuffer \page
% \setuplayout[grid=yes,lines=18]\getbuffer \page
% \setuplayout[grid=yes,lines=19]\getbuffer \page
% \stoptext
%
% test
%
% \startregels
% \gform[<]{35 \cdot p^{\frac{3}{4}} = 70}
% \gform{12{,}4 \cdot d^3 = 200}
% \gform{a \cdot x^b}.
% \gform{12x^6 \cdot \negative 3x^4}
% \gform{\frac{12x^6}{\negative 3x^4}}
% \gform{(4x^2)^3}
% \gform{4x \sqrt{x} \cdot 3x^2}
% \gform{\frac{2x^4}{4x \sqrt{x}}}
% \gform{y = a \cdot x^b}.
% \gform{y_1 = \frac{15x^2}{x}}
% \gform{y_2 = x \cdot \sqrt{x}}
% \gform{y_3 = \frac{6x^3}{x^2}}
% \gform[<]{y_4 = \left(2x^2\right)^{\frac{1}{2}}}
% \gform{y_1 = \frac{4x^5}{x^2}}
% \gform{y_2 = 4 \cdot \sqrt{x}}
% \gform{y_3 = 4x^3}
% \gform{y_4 = \frac{100x}{\sqrt{x}}}
% \gform[<]{y_5 = 4 \cdot x^{\frac{1}{2}}}
% \gform{y_6 = \frac{1}{2} x \cdot 4x^2}
% \gform{y_7 = 2 \cdot x^3}
% \gform{y_8 = 100 \cdot x^{\frac{1}{2}}}
% \gform{4x^8 \cdot 8x^3}
% \gform{\frac{4x^8}{8x^3}}
% \gform{\left(\negative3x^4\right)^3}
% \gform{x^3 \sqrt{x} \cdot 3x^2}
% \gform{\frac{6x^3}{x^2 \sqrt{x}}}
% \gform{\frac{6}{2x^4}}
% \gform{\frac{1}{3x^6}}
% \gform{\frac{12x^8}{4x^{10}}}
% \gform{\frac{4}{\sqrt{x}}}
% \gform{\frac{1}{2x \sqrt{x}}}
% \gform{\frac{2{,}25}{p} = 0{,}35}
% \gform{4{,}50 + \frac{300}{k} = 4{,}70}
% \gform{\frac{1200}{k+12} - 42 = 6}
% \stopregels
%D \macros
%D {enableautomath}
%D
%D The next one can be dangerous, but handy in controlled
%D situations.
\bgroup \catcode`\$=\active
\gdef\enableautomath
{\catcode`\$=\active
\def$##1${\snappedinlineformula{##1}}}
% \gdef\enableautomath
% {\catcode`\$=\active
% \def${\doifnextcharelse$\doautodmath\doautoimath}%
% \def\doautoimath##1${\snappedinlineformula{##1}}%
% \def\doautodmath$##1$${\startformula##1\stopformula}}
\egroup
\protect \endinput
|
