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Diffstat (limited to 'tex/context/base/core-fnt.mkiv')
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diff --git a/tex/context/base/core-fnt.mkiv b/tex/context/base/core-fnt.mkiv new file mode 100644 index 000000000..a7c84a5a0 --- /dev/null +++ b/tex/context/base/core-fnt.mkiv @@ -0,0 +1,293 @@ +%D \module +%D [ file=core-fnt, +%D version=1995.10.10, +%D title=\CONTEXT\ Core Macros, +%D subtitle=Fonts, +%D author=Hans Hagen, +%D date=\currentdate, +%D copyright={PRAGMA / Hans Hagen \& Ton Otten}] +%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 Core Macros / Fonts} + +\unprotect + +%D \macros +%D {compound} +%D +%D We will overload the already active \type {|} so we have +%D to save its meaning in order to be able to use this handy +%D macro. +%D +%D \starttyping +%D so test\compound{}test can be used instead of test||test +%D \stoptyping + +\bgroup \catcode`\|=\@@active \gdef\compound#1{|#1|} \egroup + +%D Here we hook some code into the clean up mechanism needed +%D for verbatim data. + +\appendtoks + \disablecompoundcharacters + \disablediscretionaries +\to \everycleanupfeatures + +%D \macros +%D {stretched} +%D +%D Stretching characters in a word is a sort of typographical +%D murder. Nevertheless we support this manipulation for use in +%D for instance titles. +%D +%D \starttyping +%D \hbox to 5cm{\stretched{murder}} +%D \stoptyping +%D +%D \typebuffer +%D +%D or +%D +%D \startvoorbeeld +%D \getbuffer +%D \stopvoorbeeld +%D +%D \showsetup{stretched} + +\def\stretched#1% + {\ifvmode\hbox to \hsize\else\ifinner\else\hbox\fi\fi + \bgroup\processtokens\relax\hss\relax{\hss\hss}{#1}\egroup} + +%D \startbuffer +%D \stretched{Unknown Box} +%D \hbox to .5\hsize{\stretched{A Horizontal Box}} +%D \vbox to 2cm{\stretched{A Vertical Box}} +%D \hbox to 3cm{\stretched{sp{\'e}c{\`\i}{\"a}l}} +%D \stopbuffer +%D +%D \getbuffer +%D +%D The first line of this macros takes care of boxing. Normally +%D one will use an \type{\hbox} specification. The last line +%D shows how special characters should be passed. +%D +%D \typebuffer + +%D \macros +%D {stretchednormalcase, stretcheduppercase, stretchedlowercase} +%D +%D A convenient alternative is: +%D +%D \starttyping +%D \stretcheduppercase{Is this what you like?} +%D \stoptyping +%D +%D \typebuffer +%D +%D this one uses fixed skips and kerns. +%D +%D \startvoorbeeld +%D \getbuffer +%D \stopvoorbeeld +%D +%D The default skip can be set with: + +%D Given the following settings, the space is 1em by default: + +\def\stretchedspacefactor{4} +\def\stretchedspaceamount{.25em} +\def\stretchedbreaktokens{.@/} + +\unexpanded\def\stretchednormalcase + {\stretchedsomecase\firstofoneargument} + +\unexpanded\def\stretcheduppercase + {\stretchedsomecase{\the\everyuppercase\uppercase}} + +\unexpanded\def\stretchedlowercase + {\stretchedsomecase{\the\everylowercase\lowercase}} + +\def\stretchedsomecase#1#2% + {\bgroup + #1{\def\textstring{#2}}% + \ifdim\stretchedspaceamount=\zeropoint + \textstring + \else + \def\textkern##1% + {% beware: ##1 may not be \box\somebox -) + \determinemidwordbreak{##1}{\stretchedbreaktokens}% + \kern\stretchedspaceamount##1\domidwordbreak}% + \def\textskip + {\scratchdimen\stretchedspaceamount + \hskip\stretchedspacefactor\scratchdimen}% + \@EA\processtokens\@EA\relax\@EA\textkern\@EA\relax\@EA\textskip\@EA{\textstring}% + \fi + \egroup} + +%D An auxiliary macro, see for usage \type {\stretcheduppercase}. + +\let\domidwordbreak\relax + +\def\setmidwordbreaktoken#1% + {\sfcode`#1=5000\relax} + +\def\determinemidwordbreak#1#2% + {\edef\midwordbreaktokens{#2}% + \ifx\midwordbreaktokens\empty + \global\let\domidwordbreak\relax + \else + \setbox\scratchbox\hbox + {\expandafter\handletokens\midwordbreaktokens\with\setmidwordbreaktoken + a\space \!!dimena\lastskip + #1\space\!!dimenb\lastskip \relax % needed + \ifdim\!!dimena=\!!dimenb + \globallet\domidwordbreak\relax + \else + \globallet\domidwordbreak\allowbreak + \fi}% + \fi} + +%D \macros +%D {shiftedword, shiftedwords} +%D +%D Used as \type {\shiftedwords {10pt} {some text}} this macro will +%D move + +% \def\shiftedword#1% #2% +% {\raise#1\hbox} % {#2}} % officially: {\ifdim#1>\zeropoint\raise\else\lower\fi#1\hbox{#2}} + +% \def\shiftedwords#1#2% +% {\processisolatedwords{#2}{\shiftedword{#1}}} + +%D \macros +%D {low, high, lohi, hilo} +%D +%D Although \TEX\ is pretty well aware of super- and +%D subscripts, its mechanism is mainly tuned for math mode. +%D The next few commands take care of script texts both modes. +%D +%D \startbuffer +%D The higher\high{one goes} the lower\low{one drops}, or\lohi{yes}{no}? +%D \stopbuffer +%D +%D \typebuffer +%D +%D \getbuffer +%D +%D Note the different placement of \type {\lohi}, where we +%D need a bit more space. The implementation looks a bit +%D fuzzy, since some \type {\fontdimen}'s are involved to +%D determine the optimal placement. + +\def\dodohighlow + {\ifx\fontsize\empty + \ifmmode + \ifnum\fam<0 \tx \else \holamathfont \fi + \else + \tx + \fi + \else + \tx + \fi} + +\def\dohighlow#1#2#3#4#5% todo, named fontdimens + {\dontleavehmode + \bgroup + \scratchdimen\ifdim\fontexheight\textfont2=1ex #2\textfont2\else #3ex\fi + \advance\scratchdimen #4ex + \kern.1ex + \setbox\scratchbox\hbox{#1\scratchdimen\hbox{\dodohighlow#5}}% + \ht\scratchbox\strutheight + \dp\scratchbox\strutdepth + \box\scratchbox + \egroup} + +\unexpanded\def\high{\dohighlow\raise\mathsupnormal{.86}{0}} +\unexpanded\def\low {\dohighlow\lower\mathsubnormal{.48}{0}} + +\unexpanded\def\lohi + {\dosingleempty\dolohi} + +\unexpanded\def\hilo + {\dosingleempty\dohilo} + +\def\dolohi[#1]#2#3% + {\dontleavehmode + \hbox + {\setbox4\hbox{\dohighlow\lower\mathsubnormal{.48}{.1}{#2}}% + \setbox6\hbox{\dohighlow\raise\mathsupnormal{.86}{.1}{#3}}% + \doif{#1}{\v!left} + {\ifdim\wd4<\wd6 + \setbox4\hbox to \wd6{\hss\box4}% + \else + \setbox6\hbox to \wd4{\hss\box6}% + \fi}% + \ifdim\wd4<\wd6 + \wd4=\zeropoint\box4\box6 + \else + \wd6=\zeropoint\box6\box4 + \fi}} + +\def\dohilo[#1]#2#3% + {\dolohi[#1]{#3}{#2}} + +%D You can provide an optional keyword \type {left}, in which +%D case the super and subscripts will be aligned in a way that +%D permits placement at the left of a word (which means that +%D it will be right aligned). +%D +%D \startbuffer +%D \lohi{aha}{ah} test \lohi{aha}{ah} test +%D \lohi[left]{aha}{ah} test \lohi[left]{aha}{ah} test +%D \lohi{aha}{ah} test\lohi{aha}{ah} test +%D \lohi[left]{aha}{ah}test \lohi[left]{aha}{ah}test +%D \stopbuffer +%D +%D \typebuffer +%D +%D \getbuffer + +%D \macros +%D {setupinitial,placeinitial,checkinitial} +%D +%D {\em To be documented.} +%D +%D \starttyping +%D \setupinitial[state=start] \placeinitial \input tufte +%D \stoptyping +%D +%D and +%D +%D \starttyping +%D \def\bpar{\ifvmode\checkinitial\fi} +%D \def\epar{\ifhmode\par\fi\checkinitial} +%D \stoptyping + +% to do: more fine tuning + +\unexpanded\def\setupinitial + {\dodoubleempty\getparameters[\??dc]} + +\definefontsynonym[Initial][Regular] % prefered initial identifier +\definefontsynonym[initial][Initial] % internal but accepted too + +\setupinitial + [\c!state=\v!stop, + \c!location=\v!text, + \c!n=3, + \c!distance=.125em, + \c!command=, + \s!font=initial] + +\def\AutoDroppedCapsCommand{\NiceDroppedCaps\@@dccommand\@@dcfont\@@dcdistance\@@dcn}% + +\unexpanded\def\placeinitial + {\doifelse\@@dclocation\v!margin{\chardef\DropMode\plusone}{\chardef\DropMode\zerocount}% + \doif \@@dcstate\v!start{\ifcase\@@dcn\else\AutoDroppedCaps\fi}} + +\let\checkinitial\CheckDroppedCaps + +\protect \endinput |