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Diffstat (limited to 'tex/context/base/mkiv/math-frc.mkxl')
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diff --git a/tex/context/base/mkiv/math-frc.mkxl b/tex/context/base/mkiv/math-frc.mkxl deleted file mode 100644 index b232868cd..000000000 --- a/tex/context/base/mkiv/math-frc.mkxl +++ /dev/null @@ -1,833 +0,0 @@ -%D \module -%D [ file=math-frc, -%D version=2013.04.06, % 2007.07.19, -%D title=\CONTEXT\ Math Macros, -%D subtitle=Fractions, -%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 / Fractions} - -\unprotect - -%D I need to check it all again as there was a bug in luatex with dimensions that could -%D resulted in side effects that made me mess with spacing. - -\permanent\protected\def\topstrut{\vrule\s!width\zeropoint\s!height\strutht\s!depth\zeropoint\relax} -\permanent\protected\def\botstrut{\vrule\s!width\zeropoint\s!height\zeropoint\s!depth\strutdp\relax} - -\permanent\protected\def\mathtopstrut{\setbox\scratchbox\mathstylehbox{(}\vrule\s!width\zeropoint\s!height\ht\scratchbox\s!depth\zeropoint\relax} -\permanent\protected\def\mathbotstrut{\setbox\scratchbox\mathstylehbox{(}\vrule\s!width\zeropoint\s!height\zeropoint\s!depth\dp\scratchbox\relax} - -%D This module is reimplemented in \MKIV\ style. - -\registerctxluafile{math-frc}{} - -%D \macros -%D {frac, xfrac, xxfrac} -%D -%D This is another one Tobias asked for. It replaces the primitive \type -%D {\over}. We also take the opportunity to handle math style restoring, -%D which makes sure units and chemicals come out ok. The \type {\frac} -%D macro kind of replaces the awkward \type {\over} primitive. Say that -%D we have the following formulas: -%D -%D \startbuffer[sample] -%D test $\frac {1}{2}$ test $$1 + \frac {1}{2} = 1.5$$ -%D test $\xfrac {1}{2}$ test $$1 + \xfrac {1}{2} = 1.5$$ -%D test $\xxfrac{1}{2}$ test $$1 + \xxfrac{1}{2} = 1.5$$ -%D \stopbuffer -%D -%D \typebuffer[sample] -%D -%D With the most straightforward definitions, we get: -%D -%D \startbuffer[code] -%D \def\dofrac#1#2#3{\relax\mathematics{{{#1{#2}}\over{#1{#3}}}}} -%D -%D \def\frac {\dofrac\mathstyle} -%D \def\xfrac {\dofrac\scriptstyle} -%D \def\xxfrac{\dofrac\scriptscriptstyle} -%D \stopbuffer -%D -%D \typebuffer[code] \getbuffer[code,sample] -%D -%D Since this does not work well, we can try: -%D -%D \startbuffer[code] -%D \def\xfrac #1#2{\hbox{$\dofrac\scriptstyle {#1}{#2}$}} -%D \def\xxfrac#1#2{\hbox{$\dofrac\scriptscriptstyle{#1}{#2}$}} -%D \stopbuffer -%D -%D \typebuffer[code] \getbuffer[code,sample] -%D -%D This for sure looks better than: -%D -%D \startbuffer[code] -%D \def\xfrac #1#2{{\scriptstyle \dofrac\relax{#1}{#2}}} -%D \def\xxfrac#1#2{{\scriptscriptstyle\dofrac\relax{#1}{#2}}} -%D \stopbuffer -%D -%D \typebuffer[code] \getbuffer[code,sample] -%D -%D So we stick to the next definitions (watch the local overloading of -%D \type {\xfrac}). -%D -%D In the meantime, in \LUATEX, we have better control over styles so the -%D following macros are different from the \MKII\ ones. - -% obsolete, is now c!mathstyle -% -% 0=auto, 1=displaystyle, 2=textstyle, 3=scriptstyle, 4=scriptscriptstyle, 5=mathstyle -% -% $\mathfracmode0 \frac{1}{2}$ -% $\mathfracmode1 \frac{1}{2}$ -% $\mathfracmode2 \frac{1}{2}$ -% $\mathfracmode3 \frac{1}{2}$ -% $\mathfracmode4 \frac{1}{2}$ -% $\mathfracmode5 \frac{1}{2}$ -% -% we keep the constant for a while - -\setnewconstant\mathfracmode\zerocount - -\installcorenamespace{mathfractions} -\installcorenamespace{mathfractionstyle} -\installcorenamespace{mathfractionalternative} - -\installcommandhandler \??mathfractions {mathfraction} \??mathfractions - -\aliased\let\setupmathfractions\setupmathfraction - -% color only applies to rule, use regular color for rest - -\setupmathfractions - [\c!mathstyle=, - \c!alternative=\v!inner, - \c!margin=\zeropoint, - \c!rulethickness=.25\exheight, - \c!left=0x2E, - \c!right=0x2E, - \c!strut=\v!yes, - \c!topdistance=, - \c!bottomdistance=, - \c!rule=\v!auto] - -\appendtoks - \instance\setuevalue{\currentmathfraction}{\math_frac{\currentmathfraction}}% -\to \everydefinemathfraction - -% Sometimes users want control over the distances: - -\let\math_fraction_set_distance\relax - -\appendtoks - \math_fraction_set_distance -\to \everymathematics - -% why only displaystyle .. a bit weak - -\protected\def\math_fraction_set_distance_top - {\Umathfractionnumup \displaystyle\m_math_fraction_distance_top - \relax} - -\protected\def\math_fraction_set_distance_bot - {\Umathfractiondenomdown\displaystyle\m_math_fraction_distance_bot - \relax} - -\protected\def\math_fraction_set_distance_all - {\Umathfractionnumup \displaystyle\m_math_fraction_distance_top - \Umathfractiondenomdown\displaystyle\m_math_fraction_distance_bot - \relax} - -\appendtoks - \ifempty\currentmathfraction - \edef\m_math_fraction_distance_top{\mathfractionparameter\c!topdistance}% - \edef\m_math_fraction_distance_bot{\mathfractionparameter\c!bottomdistance}% - \ifempty\m_math_fraction_distance_top - \ifempty\m_math_fraction_distance_bot - \let\math_fraction_set_distance\relax - \else - \let\math_fraction_set_distance\math_fraction_set_distance_bot - \fi - \else - \ifempty\m_math_fraction_distance_bot - \let\math_fraction_set_distance\math_fraction_set_distance_top - \else - \let\math_fraction_set_distance\math_fraction_set_distance_all - \fi - \fi - \fi -\to \everysetupmathfraction - -% So far for control. - -\installcorenamespace{mathfractionstrut} - -\def\math_frac_no_strut - {\enforced\let\m_fractions_strut_top\relax - \enforced\let\m_fractions_strut_bot\relax} - -\setvalue{\??mathfractionstrut\v!yes}% - {\enforced\let\m_fractions_strut_top\mathstrut - \enforced\let\m_fractions_strut_bot\mathstrut} - -\setvalue{\??mathfractionstrut\v!math}% - {\enforced\let\m_fractions_strut_top\mathstrut - \enforced\let\m_fractions_strut_bot\mathstrut} - -\letvalue{\??mathfractionstrut\v!no}\math_frac_no_strut - -\setvalue{\??mathfractionstrut\v!tight}% - {\enforced\let\m_fractions_strut_top\mathbotstrut % indeed swapped name - \enforced\let\m_fractions_strut_bot\mathtopstrut} % indeed swapped name - -\math_frac_no_strut - -\newdimen\d_math_fraction_margin - -\protected\def\math_frac#1% - {\begingroup - \edef\currentmathfraction{#1}% - % - \edef\p_math_fraction_fences{\mathfractionparameter\c!fences}% - \ifempty\p_math_fraction_fences \else - \math_fenced_fenced_start\p_math_fraction_fences - \fi - % - \d_math_fraction_margin\mathfractionparameter\c!margin - % - \edef\p_math_fractions_color{\mathfractionparameter\c!color}% - % - \edef\p_math_fractions_strut{\mathfractionparameter\c!strut}% - \ifcsname\??mathfractionstrut\p_math_fractions_strut\endcsname - \lastnamedcs - \else - \math_frac_no_strut - \fi - % - \ifempty\p_math_fractions_color - \expandafter\math_frac_normal - \else - \expandafter\math_frac_colored - \fi} - -\protected\def\math_frac_wrapup - {\ifempty\p_math_fraction_fences \else - \math_fenced_fenced_stop\p_math_fraction_fences - \fi - \endgroup} - -\protected\def\math_frac_colored#1#2% - {\savecolor - \colo_helpers_activate\p_math_fractions_color - \math_frac_normal{\restorecolor#1}{\restorecolor#2}} - -\protected\def\math_frac_normal - {\expandnamespaceparameter\??mathfractionalternative\mathfractionparameter\c!alternative\v!inner} - -% we use utfchar anyway so we can as well do all at the lua end - -\def\math_frac_no_delim{0x2E} - -\def\math_frac_command - {\clf_mathfraction - {\mathfractionparameter\c!rule}% - \ifempty\p_math_fraction_fences - \mathfractionparameter\c!left \space - \mathfractionparameter\c!right\space - \else - \math_frac_no_delim\space - \math_frac_no_delim\space - \fi - \dimexpr\mathfractionparameter\c!rulethickness\relax - \relax} - -% Having a \withmarginornot{#1}{#2} makes not much sense nor do 4 tests or 4 redundant -% kerns (longer node lists plus possible interference). A split in normal and margin -% also makes testing easier. When left and right margins are needed we might merge the -% variants again. After all, these are not real installers. - -% the denominator is in cramped! - -\setvalue{\??mathfractionalternative\v!inner}% - {\ifcase\d_math_fraction_margin - \expandafter\math_fraction_inner_normal - \else - \expandafter\math_fraction_inner_margin - \fi} - -\setvalue{\??mathfractionalternative\v!outer}% - {\ifcase\d_math_fraction_margin - \expandafter\math_fraction_outer_normal - \else - \expandafter\math_fraction_outer_margin - \fi} - -\setvalue{\??mathfractionalternative\v!both}% - {\ifcase\d_math_fraction_margin - \expandafter\math_fraction_both_normal - \else - \expandafter\math_fraction_both_margin - \fi} - -% todo: store first state and reuse second time - -% \def\math_fraction_inner_normal#1#2% -% {\Ustack{% -% {% -% {\usemathstyleparameter\mathfractionparameter{\m_fractions_strut_top#1}}% -% \math_frac_command -% {\usemathstyleparameter\mathfractionparameter{\m_fractions_strut_bot#2}}% -% }% -% }% -% \math_frac_wrapup} -% -% \def\math_fraction_outer_normal#1#2% -% {\Ustack{% -% \usemathstyleparameter\mathfractionparameter -% {% -% {\m_fractions_strut_top#1}% -% \math_frac_command -% {\m_fractions_strut_bot#2}% -% }% -% }% -% \math_frac_wrapup} -% -% \def\math_fraction_both_normal#1#2% -% {\Ustack{% -% \usemathstyleparameter\mathfractionparameter -% {% -% {\usemathstyleparameter\mathfractionparameter\m_fractions_strut_top#1}% -% \math_frac_command -% {\usemathstyleparameter\mathfractionparameter\m_fractions_strut_bot#2}% -% }% -% }% -% \math_frac_wrapup} -% -% \def\math_fraction_inner_margin#1#2% -% {\Ustack{% -% {% -% {\kern\d_math_fraction_margin -% \usemathstyleparameter\mathfractionparameter{\m_fractions_strut_top#1}% -% \kern\d_math_fraction_margin}% -% \math_frac_command -% {\kern\d_math_fraction_margin -% \usemathstyleparameter\mathfractionparameter{\m_fractions_strut_bot#2}% -% \kern\d_math_fraction_margin}% -% }% -% }% -% \math_frac_wrapup} -% -% \def\math_fraction_outer_margin#1#2% -% {\Ustack{% -% \usemathstyleparameter\mathfractionparameter -% {% -% {\kern\d_math_fraction_margin -% \m_fractions_strut_top#1% -% \kern\d_math_fraction_margin}% -% \math_frac_command -% {\kern\d_math_fraction_margin -% \m_fractions_strut_bot#2% -% \kern\d_math_fraction_margin}% -% }% -% }% -% \math_frac_wrapup} -% -% \def\math_fraction_both_margin#1#2% -% {\Ustack{% -% \usemathstyleparameter\mathfractionparameter -% {% -% {\kern\d_math_fraction_margin -% \usemathstyleparameter\mathfractionparameter\m_fractions_strut_top#1% -% \kern\d_math_fraction_margin}% -% \math_frac_command -% {\kern\d_math_fraction_margin -% \usemathstyleparameter\mathfractionparameter\m_fractions_strut_bot#2% -% \kern\d_math_fraction_margin}% -% }% -% }% -% \math_frac_wrapup} - -\def\math_frac_command_u - {\clf_umathfraction - {\mathfractionparameter\c!rule}% - \ifx\p_math_fraction_fences\empty - \mathfractionparameter\c!left \space - \mathfractionparameter\c!right\space - \else - \math_frac_no_delim\space - \math_frac_no_delim\space - \fi - \dimexpr\mathfractionparameter\c!rulethickness\relax - \relax} - -\def\math_fraction_inner_normal#1#2% - {\Ustack{% forces num style - \math_frac_command_u - {\usemathstyleparameter\mathfractionparameter{\m_fractions_strut_top#1}}% - {\usemathstyleparameter\mathfractionparameter{\m_fractions_strut_bot#2}}% - }% - \math_frac_wrapup} - -\def\math_fraction_outer_normal#1#2% - {\Ustack{% forces num style - \usemathstyleparameter\mathfractionparameter - \math_frac_command_u - {\m_fractions_strut_top#1}% - {\m_fractions_strut_bot#2}% - }% - \math_frac_wrapup} - -\def\math_fraction_both_normal#1#2% - {\Ustack{% forces num style - \usemathstyleparameter\mathfractionparameter - \math_frac_command_u - {\usemathstyleparameter\mathfractionparameter\m_fractions_strut_top#1}% - {\usemathstyleparameter\mathfractionparameter\m_fractions_strut_bot#2}% - }% - \math_frac_wrapup} - -\def\math_fraction_inner_margin#1#2% - {\Ustack{% - {% - \math_frac_command_u - {\kern\d_math_fraction_margin - \usemathstyleparameter\mathfractionparameter{\m_fractions_strut_top#1}% - \kern\d_math_fraction_margin}% - {\kern\d_math_fraction_margin - \usemathstyleparameter\mathfractionparameter{\m_fractions_strut_bot#2}% - \kern\d_math_fraction_margin}% - }% - }% - \math_frac_wrapup} - -\def\math_fraction_outer_margin#1#2% - {\Ustack{% - \usemathstyleparameter\mathfractionparameter - {% - \math_frac_command_u - {\kern\d_math_fraction_margin - \m_fractions_strut_top#1% - \kern\d_math_fraction_margin}% - {\kern\d_math_fraction_margin - \m_fractions_strut_bot#2% - \kern\d_math_fraction_margin}% - }% - }% - \math_frac_wrapup} - -\def\math_fraction_both_margin#1#2% - {\Ustack{% - \usemathstyleparameter\mathfractionparameter - {% - \math_frac_command_u - {\kern\d_math_fraction_margin - \usemathstyleparameter\mathfractionparameter\m_fractions_strut_top#1% - \kern\d_math_fraction_margin}% - {\kern\d_math_fraction_margin - \usemathstyleparameter\mathfractionparameter\m_fractions_strut_bot#2% - \kern\d_math_fraction_margin}% - }% - }% - \math_frac_wrapup} - -\definemathfraction[xfrac] [\c!alternative=\v!inner,\c!mathstyle=\s!script] -\definemathfraction[xxfrac][\c!alternative=\v!inner,\c!mathstyle=\s!scriptscript] - -\let\normalxfrac\xfrac - -\protected\def\xfrac#1#2{\normalxfrac{\let\xfrac\xxfrac#1}{\let\xfrac\xxfrac#2}} - -%D Spacing (sensitive for definition of \triggermathstyle: - -% \ifcase\contextlmtxmode - -\permanent\protected\def\nomathfractiongaps {\normalexpanded{\math_no_fraction_gaps \mathstyletrigger\mathstyle}} % maybe collect settings -\permanent\protected\def\overlaymathfractiongaps{\normalexpanded{\math_overlay_fraction_gaps\mathstyletrigger\mathstyle}} % maybe collect settings - -\protected\def\math_no_fraction_gaps#1% - {\Umathfractionnumup #1\zeropoint - \Umathfractiondenomdown#1\zeropoint} - -\protected\def\math_overlay_fraction_gaps#1% - {\Umathfractionnumup #1\zeropoint - \Umathfractionnumvgap #1\zeropoint - %Umathfractionrule #1\zeropoint - \Umathfractiondenomvgap#1\zeropoint - \Umathfractiondenomdown#1\zeropoint} - -% \else - -% \protected\def\math_no_fraction_gaps -% {\Umathfractionnumup \mathstyle\zeropoint -% \Umathfractiondenomdown\mathstyle\zeropoint} -% -% \protected\def\math_overlay_fraction_gaps -% {\Umathfractionnumup \mathstyle\zeropoint -% \Umathfractionnumvgap \mathstyle\zeropoint -% %Umathfractionrule \mathstyle\zeropoint -% \Umathfractiondenomvgap\mathstyle\zeropoint -% \Umathfractiondenomdown\mathstyle\zeropoint} - -% \fi - -\installcorenamespace{mathfractiondistance} - -\letvalue{\??mathfractiondistance\v!none }\nomathfractiongaps -\letvalue{\??mathfractiondistance\v!no }\nomathfractiongaps -\letvalue{\??mathfractiondistance\v!overlay}\overlaymathfractiongaps - -\setupmathfractions - [\c!distance=\v!none] - -\appendtoks - \edef\p_distance{\rootmathfractionparameter\c!distance}% - \ifempty\p_distance\else - \ifcsname\??mathfractiondistance\p_distance\endcsname - \lastnamedcs - \fi - \fi -\to \everymathematics - -% theshold is new! - -\let\math_fraction_set_threshold_inline \relax -\let\math_fraction_set_threshold_display\relax - -\appendtoks - \math_fraction_set_threshold_inline - \math_fraction_set_threshold_display -\to \everymathematics - -\appendtoks - \ifempty\currentmathfraction - \edef\p_threshold{\mathfractionparameter\c!inlinethreshold}% - \ifempty\p_threshold - \let\math_fraction_set_threshold_inline\relax - \orelse\ifx\p_threshold\v!auto - \let\math_fraction_set_threshold_inline\relax - \else - \let\math_fraction_set_threshold_inline\math_fraction_set_theshold_inline - \fi - \edef\p_threshold{\mathfractionparameter\c!displaythreshold}% - \ifempty\p_threshold - \let\math_fraction_set_threshold_display\relax - \orelse\ifx\p_threshold\v!auto - \let\math_fraction_set_threshold_display\relax - \else - \let\math_fraction_set_threshold_display\math_fraction_set_theshold_display - \fi - \fi -\to \everysetupmathfraction - -\def\math_fraction_set_theshold_inline - {\edef\p_threshold{\mathfractionparameter\c!inlinethreshold}% - \Umathfractiondelsize\textstyle \p_threshold\dimexpr\textface\relax - \Umathfractiondelsize\scriptstyle \p_threshold\dimexpr\scriptface\relax - \Umathfractiondelsize\scriptscriptstyle\p_threshold\dimexpr\scriptscriptface\relax} - -\def\math_fraction_set_theshold_display - {\edef\p_threshold{\mathfractionparameter\c!displaythreshold}% - \Umathfractiondelsize\displaystyle \p_threshold\dimexpr\textface\relax} - -%D \macros -%D {dfrac, tfrac, frac, dbinom, tbinom, binom} -%D -%D \startbuffer -%D $\dfrac {1}{2} \tfrac {1}{2} \frac {1}{2}$ -%D $\dbinom{1}{2} \tbinom{1}{2} \binom{1}{2}$ -%D \stopbuffer -%D -%D \typebuffer -%D \getbuffer - -% $$ -% {{a}\over{b}} + -% {{a}\overwithdelims(){b}} + -% {{a}\atopwithdelims(){b}} + -% {{a}\abovewithdelims()\zeropoint{b}} + -% \left({{a}\over{b}}\right) -% $$ - -% \dorecurse {10} { % weird -% $$ {{a}\abovewithdelims()#1pt{b}} $$ -% } - -\definemathfraction[i:frac] [\c!alternative=\v!inner,\c!mathstyle=] % was script and then small but nothing needed -\definemathfraction[i:tfrac][\c!alternative=\v!inner,\c!mathstyle=\s!text] % was script (before luatex fix) -\definemathfraction[i:sfrac][\c!alternative=\v!inner,\c!mathstyle=\s!scriptscript] -\definemathfraction[i:dfrac][\c!alternative=\v!inner,\c!mathstyle=\s!display] - -\definemathfraction[d:frac] [\c!alternative=\v!inner,\c!mathstyle=\s!cramped] % was cramped,text -\definemathfraction[d:tfrac][\c!alternative=\v!both ,\c!mathstyle={\s!cramped,\s!text}] % was cramped,script (before luatex fix) -\definemathfraction[d:sfrac][\c!alternative=\v!both ,\c!mathstyle={\s!cramped,\s!scriptscript}] -\definemathfraction[d:dfrac][\c!alternative=\v!inner,\c!mathstyle=\s!display] - -%D \protected\def\ShowMathFractions#1#2% -%D {\dontleavehmode -%D \begingroup -%D \showmathstruts -%D \mathematics{x+\tfrac{#1}{#2}+1+\frac{#1}{#2}+2+\sfrac{#1}{#2}+g}% -%D \endgroup} -%D -%D The default \type {tfrac}, \type {frac} and \type \sfrac} look like this: -%D -%D \blank -%D \ShowMathFractions{a}{a}\par -%D \ShowMathFractions{1}{x}\par -%D \ShowMathFractions{a}{b}\par -%D \ShowMathFractions{1}{b}\par -%D \blank - -\permanent\protected\def\frac {\csname\inlineordisplaymath id:frac\endcsname} -\permanent\protected\def\tfrac{\csname\inlineordisplaymath id:tfrac\endcsname} -\permanent\protected\def\sfrac{\csname\inlineordisplaymath id:sfrac\endcsname} -\permanent\protected\def\dfrac{\csname\inlineordisplaymath id:dfrac\endcsname} - -\definemathfraction[ams] [\c!strut=\v!no,\c!alternative=\v!outer] -\definemathfraction[i:ams:frac][ams][\c!mathstyle={\s!cramped,\s!text}] -\definemathfraction[d:ams:frac][ams][\c!mathstyle={\s!cramped,\s!display}] - -\permanent\protected\def\ctxfrac{\csname\inlineordisplaymath id:frac\endcsname} -\permanent\protected\def\amsfrac{\csname\inlineordisplaymath id:ams:frac\endcsname} - -% \appendtoks -% \doifelse{\mathfractionparameter\c!option}{ams}% -% {\let\frac\amsfrac}% -% {\let\frac\ctxfrac}% -% \to \everysetupmathfraction - -\appendtoks - \doifelse{\mathematicsparameter\c!fractions}{ams}% - {\enforced\let\frac\amsfrac}% - {\enforced\let\frac\ctxfrac}% -\to \everysetupmathematics - -% \definemathfraction[ddfrac][\c!mathstyle=\s!display] -% \definemathfraction[ttfrac][\c!mathstyle=\s!text] -% \definemathfraction[ssfrac][\c!mathstyle=\s!script] - -% \protected\def\binom #1#2{{\Ustack {{#1}\normalabovewithdelims()\zeropoint{#2}}}} -% \protected\def\dbinom#1#2{{\displaystyle{{#1}\normalabovewithdelims()\zeropoint{#2}}}} -% \protected\def\tbinom#1#2{{\textstyle {{#1}\normalabovewithdelims()\zeropoint{#2}}}} - -\definemathfraction - [binom] - [\c!alternative=\v!outer, - \c!rule=\v!no, - \c!left=0x28, - \c!right=0x29, - \c!mathstyle=\s!auto] - -\definemathfraction - [dbinom] - [binom] - [\c!mathstyle=\s!display] - -\definemathfraction - [tbinom] - [binom] - [\c!mathstyle=\s!text] - -%D \macros -%D {cfrac} -%D -%D \startbuffer -%D $\cfrac{12}{3} \cfrac[l]{12}{3} \cfrac[c]{12}{3} \cfrac[r]{12}{3}$ -%D $\cfrac{1}{23} \cfrac[l]{1}{23} \cfrac[c]{1}{23} \cfrac[r]{1}{23}$ -%D \stopbuffer -%D -%D \typebuffer -%D -%D \getbuffer -%D -%D Now we can align every combination we want: -%D -%D \startbuffer -%D $\cfrac{12}{3} \cfrac[l]{12}{3} \cfrac[c]{12}{3} \cfrac[r]{12}{3}$ -%D $\cfrac{1}{23} \cfrac[l]{1}{23} \cfrac[c]{1}{23} \cfrac[r]{1}{23}$ -%D $\cfrac[cl]{12}{3} \cfrac[cc]{12}{3} \cfrac[cr]{12}{3}$ -%D $\cfrac[lc]{1}{23} \cfrac[cc]{1}{23} \cfrac[rc]{1}{23}$ -%D \stopbuffer -%D -%D \typebuffer -%D -%D \getbuffer - -\permanent\protected\def\cfrac - {\doifelsenextoptionalcs\math_cfrac_yes\math_cfrac_nop} - -\def\math_cfrac_nop {\math_cfrac_indeed[cc]} -\def\math_cfrac_yes[#1]{\math_cfrac_indeed[#1cc]} - -\def\math_cfrac_indeed[#1#2#3]#4#5% - {{\displaystyle - \frac - {\strut - \ifx r#1\hfill\fi#4\ifx l#1\hfill\fi}% - {\ifx r#2\hfill\fi#5\ifx l#2\hfill\fi}% - \kern-\nulldelimiterspace}} - -%D \macros -%D {splitfrac, splitdfrac} -%D -%D Occasionally one needs to typeset multi||line fractions. -%D These commands use \tex{genfrac} to create such fractions. -%D -%D \startbuffer -%D \startformula -%D a=\frac{ -%D \splitfrac{xy + xy + xy + xy + xy} -%D {+ xy + xy + xy + xy} -%D } -%D {z} -%D =\frac{ -%D \splitdfrac{xy + xy + xy + xy + xy} -%D {+ xy + xy + xy + xy} -%D } -%D {z} -%D \stopformula -%D \stopbuffer -%D -%D \typebuffer \getbuffer -%D -%D These macros are based on Michael J.~Downes posting on -%D comp.text.tex on 2001/12/06 but adapted a bit. - -\protected\def\splitfrac #1#2{{\textstyle {{\textstyle#1\quad\hfill}\normalabove\zeropoint{\textstyle\hfill\quad\mathstrut#2}}}} -\protected\def\splitdfrac#1#2{{\displaystyle{{ #1\quad\hfill}\normalabove\zeropoint{ \hfill\quad\mathstrut#2}}}} - -%D For testing: - -% \protected\def\ShowMathFractions#1#2% -% {\mathematics{x+\tfrac{#1}{#2}+1+\frac{#1}{#2}+2+\sfrac{#1}{#2}+g}} - -%D More fracking (for Alan): - -\protected\def\math_frac_colored_vulgar#1#2% - {\savecolor - \colo_helpers_activate\p_math_fractions_color - {\restorecolor#1}\Uskewed/{\restorecolor#2}} - -\protected\def\math_frac_normal_vulgar#1#2% - {{#1}\Uskewed/{#2}} - -\permanent\protected\def\vfrac#1#2% - {\bgroup - \edef\p_math_fractions_color{\namedmathfractionparameter\s!vfrac\c!color}% - \ifempty\p_math_fractions_color - \expandafter\math_frac_normal_vulgar - \else - \expandafter\math_frac_colored_vulgar - \fi - {#1}% - {#2}% - \egroup} - -\appendtoks - \edef\p_hfactor{\namedmathfractionparameter\s!vfrac\c!hfactor}% - \edef\p_vfactor{\namedmathfractionparameter\s!vfrac\c!vfactor}% - \Umathskewedfractionhgap\textstyle \p_hfactor\fontemwidth \mathstylefont\textstyle - \Umathskewedfractionhgap\scriptstyle \p_hfactor\fontemwidth \mathstylefont\scriptstyle - \Umathskewedfractionhgap\scriptscriptstyle\p_hfactor\fontemwidth \mathstylefont\scriptscriptstyle - \Umathskewedfractionvgap\textstyle \p_vfactor\fontexheight\mathstylefont\textstyle - \Umathskewedfractionvgap\scriptstyle \p_vfactor\fontexheight\mathstylefont\scriptstyle - \Umathskewedfractionvgap\scriptscriptstyle\p_vfactor\fontexheight\mathstylefont\scriptscriptstyle -\to \everysetupmathfraction - -\setupmathfraction - [\s!vfrac] - [\c!hfactor=.2, - \c!vfactor=.1] - -\protect \endinput - -% I have no clue what \mthfrac and \mthsqrt are supposed to do but -% I guess that it can be done with tweaking luatex's math parameters. -% Otherwise I'll write something from scratch. - -% \def\math_stylebuilders_frac#1#2#3#4#5#6#7% -% {\begingroup -% \mathsurround\zeropoint -% \setbox0\hbox{$#1 #6$}% -% \setbox2\hbox{$#1 #7$}% -% \dimen0\wd\ifdim\wd2>\wd0 2\else 0\fi -% \setbox4\hbox to \dimen0{\leaders\hbox{#4}\hss#5}% -% \mathord{\vcenter{{\offinterlineskip -% \hbox to \dimen0{\hss\box0\hss}% -% \kern\ht4% -% \hbox to \dimen0{\hss\copy4\hss}% -% \kern\ht4% -% \hbox to \dimen0{\hss\box2\hss}}}}% -% \endgroup} -% -% \def\math_stylebuilders_sqrt#1#2#3#4#5% -% {\begingroup -% \mathsurround\zeropoint -% \setbox0\hbox{$#1 #5$}% -% \ht0\dimexpr1.05\ht0+\onepoint\relax -% \dp0\dimexpr1.05\dp0+\onepoint\relax -% \setbox4\hbox to \wd0{\mr#2\leaders\hbox{#3}\hfill#4}% -% \delimitershortfall\zeropoint -% \nulldelimiterspace\zeropoint -% \setbox2\hbox{$\left\delimiter"0270370 \vrule \s!height\ht0 \s!depth \dp0 \s!width\zeropoint\right.$}% is this the right code point? -% \mathord{\vcenter{\hbox{\copy2\rlap{\raise\dimexpr\ht2-\ht4\relax\copy4}\copy0}}}% -% \endgroup} -% -% \def\mthfrac#1#2#3#4#5{\mathchoice -% {\math_stylebuilders_frac\displaystyle \textface {#1}{#2}{#3}{#4}{#5}}% -% {\math_stylebuilders_frac\textstyle \textface {#1}{#2}{#3}{#4}{#5}}% -% {\math_stylebuilders_frac\scriptstyle \scriptface {#1}{#2}{#3}{#4}{#5}}% -% {\math_stylebuilders_frac\scriptscriptstyle\scriptscriptface{#1}{#2}{#3}{#4}{#5}}} -% -% \def\mthsqrt#1#2#3{\mathchoice -% {\math_stylebuilders_sqrt\displaystyle \textface{#1}{#2}{#3}}% -% {\math_stylebuilders_sqrt\textstyle \textface{#1}{#2}{#3}}% -% {\math_stylebuilders_sqrt\scriptstyle \textface{#1}{#2}{#3}}% -% {\math_stylebuilders_sqrt\scriptscriptstyle\textface{#1}{#2}{#3}}} - -% \protected\def\mthfrac#1#2#3{[mthfrac: #1 #2 #3]} -% \protected\def\mthsqrt#1#2#3{[mthsqrt: #1 #2 #3]} - -% used for prototyping \Uskewed -% -% \protected\def\skewedfractiona#1#2{% -% \raise -% \Umathskewedfractionvgap\textstyle -% \hbox\bgroup -% $\scriptstyle#1\hskip\dimexpr\Umathskewedfractionhgap\scriptstyle/2\relax$% -% \egroup -% \hbox to \zeropoint\bgroup -% \hss$\textstyle/$\hss -% \egroup -% \lower -% \Umathskewedfractionvgap\textstyle -% \hbox\bgroup -% $\hskip\dimexpr\Umathskewedfractionhgap\scriptstyle/2\relax\scriptstyle#2$% -% \egroup -% } -% -% \protected\def\skewedfractionb#1#2{% -% \raise -% \Umathskewedfractionvgap\textstyle -% \hbox\bgroup -% $\scriptstyle#1\hskip\dimexpr\Umathskewedfractionhgap\textstyle/2\relax$% -% \egroup -% \hbox to \zeropoint\bgroup -% \hss$\textstyle/$\hss -% \egroup -% \lower -% \Umathskewedfractionvgap\textstyle -% \hbox\bgroup -% $\hskip\dimexpr\Umathskewedfractionhgap\textstyle/2\relax\scriptstyle#2$% -% \egroup -% } -% -% $\skewedfractiona{1}{2}$ -% $\skewedfractionb{1}{2}$ |