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diff --git a/tex/context/base/meta-txt.tex b/tex/context/base/meta-txt.tex new file mode 100644 index 000000000..474253a40 --- /dev/null +++ b/tex/context/base/meta-txt.tex @@ -0,0 +1,304 @@ +%D \module +%D [ file=meta-txt, +%D version=2000.07.06, +%D title=\METAPOST\ Graphics, +%D subtitle=Text Tricks, +%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. + +%D In this library some handy text manipulations are +%D defined. Some can and will be improved as soon as the +%D \TEX||\METAPOST\ interface is stable. Some of the +%D solutions may look weird, which is entirely my fault, +%D since I implemented them in the process of getting grip +%D on this kind of manipulations. Undoubtly better +%D \METAPOST\ code is possible, but my way of learning +%D this kind of trickery happens to be by \quote {trial +%D and error} and \quote {look and feel} (as well as +%D identifying tricks in Hobby's code). + +% textext ipv btex ... etex + +% we need a proper prefix here + +\unprotect + +\startMPextensions + if unknown context_text: input mp-text; fi; +\stopMPextensions + +%%%%%%% + +% \def\newchar#1{\chardef#1=0 } + +\ifdefined\MPtoks \else \newtoks\MPtoks \fi +\ifdefined\MPbox \else \newbox \MPbox \fi + +\ifdefined\parwidth \else \newdimen\parwidth \fi +\ifdefined\parheight \else \newdimen\parheight \fi +\ifdefined\parvoffset \else \newdimen\parvoffset \fi +\ifdefined\parhoffset \else \newdimen\parhoffset \fi +\ifdefined\parlines \else \newcount\parlines \fi +\ifdefined\partoks \else \newtoks \partoks \fi +\ifdefined\shapetextbox \else \newbox \shapetextbox \fi + \newif \ifparseries +\ifdefined\parfirst \else \chardef \parfirst=0 \fi + +\def\startshapetext[#1]% + {\global\newcounter\currentshapetext + \global\setbox\shapetextbox\vbox\bgroup + \expanded{\switchtobodyfont[\@@shbodyfont]}% + \dontcomplain + \hsize\parwidth + \setuptolerance[\v!verytolerant,\v!stretch]% + \!!counta\zerocount + \!!toksa\emptytoks + \def\docommand##1% + {\setbox\scratchbox\hbox{\useMPgraphic{##1}}% + \global\chardef\parfirst\zerocount + \getMPdata % \readlocfile{\MPdatafile}{}{}% + \setshapecharacteristics + \advance\!!counta by \parlines + \expandafter\appendtoks\the\partoks\to\!!toksa}% + \processcommalist[#1]\docommand + \global\parseriestrue + \xdef\totalparlines{\the\!!counta}% + \global\partoks\!!toksa + %\ifx\partoks\emptytoks\else % safeguard + \expanded{\parshape \the\!!counta \the\!!toksa}% + %\fi + \setshapecharacteristics % extra dummy + \ifparseries\def\par{\endgraf\adaptparshape}\fi + \EveryPar{\begstrut}} + +\def\stopshapetext + {\endstrut + %\removebottomthings + \egroup + \global\newcounter\currentshapetext + \getshapecharacteristics} + +\def\adaptparshape% + {\def\docommand##1% + {\ifcase\!!counta + \expandafter\appendtoks\space##1 \to\!!toksa + \else + \advance\!!counta \minusone + \fi}% + \!!counta\prevgraf + \doglobal\decrement(\totalparlines,\!!counta)% + \multiply\!!counta \plustwo + \!!toksa\emptytoks + \expanded{\processseparatedlist[\the\partoks][\space]}\docommand + \global\partoks\!!toksa + %\ifx\partoks\emptytoks\else % safeguard + \expanded{\parshape\totalparlines\the\partoks}% + }%\fi} + +\def\getshapecharacteristics% + {\doglobal\increment\currentshapetext + \doifdefinedelse{parlines:\currentshapetext} + {\global\parlines \getvalue{parlines:\currentshapetext}% + \global\chardef\parfirst \getvalue{parfirst:\currentshapetext}% + \global\parvoffset \getvalue{parvoffset:\currentshapetext}% + \global\parhoffset \getvalue{parhoffset:\currentshapetext}% + \global\parwidth \getvalue{parwidth:\currentshapetext}% + \global\parheight \getvalue{parheight:\currentshapetext}} + {\global\parlines \plusone + \global\chardef\parfirst \zerocount + \global\parvoffset \zeropoint + \global\parhoffset \zeropoint + \global\parwidth \hsize + \global\parheight \vsize}} + +\def\setshapecharacteristics% + {\doglobal\increment\currentshapetext + \setxvalue{parlines:\currentshapetext }{\the\parlines}% + \setxvalue{parfirst:\currentshapetext }{\the\parfirst}% + \setxvalue{parvoffset:\currentshapetext}{\the\parvoffset}% + \setxvalue{parhoffset:\currentshapetext}{\the\parhoffset}% + \setxvalue{parwidth:\currentshapetext }{\the\parwidth}% + \setxvalue{parheight:\currentshapetext }{\the\parheight}} + +\def\getshapetext% option: unvbox + {\vbox\bgroup + \forgetall + \setbox\scratchbox\vbox to \parheight + {\expanded{\switchtobodyfont[\@@shbodyfont]}% evt strutheight en + \splittopskip\strutheight % lineheight opslaan + \vskip\parvoffset % scheelt switch en + \ifcase\parfirst\or\vskip\lineheight\fi % is ook veiliger + \hskip\parhoffset + \hbox{\vsplit\shapetextbox to \parlines\lineheight}}% + \wd\scratchbox\parwidth + \ht\scratchbox\parheight + \dp\scratchbox\zeropoint + \box\scratchbox + \getshapecharacteristics + \egroup} + +\def\setupshapetexts% + {\dodoubleempty\getparameters[\??sh]} + +\setupshapetexts% + [\c!bodyfont=] + +%%%%%%% rotfont nog definieren + +\doifundefined{RotFont}{\definefont[RotFont][RegularBold]} + +\def\processfollowingtoken#1% strut toegevoegd + {\appendtoks#1\to\MPtoks + \setbox\MPbox=\hbox{\RotFont\setstrut\strut\the\MPtoks}% + \startMPdrawing + n := n + 1 ; len[n] := \the\wd\MPbox ; + \stopMPdrawing + \startMPdrawing[-] + % pic[n] := textext{\RotFont\setstrut\strut#1} ; % btex \RotFont\setstrut\strut#1 etex ; + pic[n] := btex \RotFont\setstrut\strut#1 etex ; + pic[n] := pic[n] shifted - llcorner pic[n] ; + \stopMPdrawing} + +\startuseMPgraphic{followtokens} + % we default to nothing +\stopuseMPgraphic + +\def\followtokens#1% + {\vbox\bgroup + \forgetall + \dontcomplain + \startMPenvironment + \doifundefined{RotFont}{\definefont[RotFont][RegularBold]} + \stopMPenvironment + \MPtoks\emptytoks + \resetMPdrawing + \startMPdrawing + \includeMPgraphic{followtokens} ; + picture pic[] ; numeric len[], n ; n := 0 ; + \stopMPdrawing + \handletokens#1\with\processfollowingtoken + \startMPdrawing + if unknown RotPath : path RotPath ; RotPath := origin ; fi ; + if unknown RotColor : color RotColor ; RotColor := black ; fi ; + if unknown TraceRot : boolean TraceRot ; TraceRot := false ; fi ; + if unknown ExtraRot : numeric ExtraRot ; ExtraRot := 0 ; fi ; + numeric al, at, pl, wid, pos ; pair ap, ad ; + al := arclength RotPath ; + if al=0 : + al := len[n] + ExtraRot ; + RotPath := origin -- (al,0) ; + fi ; + if al<len[n]: + RotPath := RotPath scaled ((len[n]+ExtraRot)/al) ; + al := arclength RotPath ; + fi ; + pl := (al-len[n])/(if n>1 : (n-1) else : 1 fi) ; + if TraceRot : + draw RotPath withpen pencircle scaled 1pt withcolor blue ; + fi ; + for i=1 upto n : + wid := abs(xpart urcorner pic[i] - xpart llcorner pic[i]) ; + pos := len[i]-wid/2 + (i-1)*pl ; + at := arctime pos of RotPath ; + ap := point at of RotPath ; + ad := direction at of RotPath ; + draw pic[i] shifted (-wid/2,0) rotated(angle(ad)) shifted ap + withcolor RotColor ; + if TraceRot : + draw boundingbox + pic[i] shifted (-wid/2,0) rotated(angle(ad)) shifted ap + withpen pencircle scaled .25pt withcolor red ; + draw ap + withpen pencircle scaled .50pt withcolor green ; + fi ; + endfor ; + \stopMPdrawing + \MPdrawingdonetrue + \getMPdrawing + \resetMPdrawing + \egroup} + +% \followtokens +% {This is just a dummy text, kerned by T{\kern +% -.1667em\lower .5ex\hbox {E}}{\kern -.125emX} and typeset +% in a circle using {\setMFPfont M}{\setMFPfont +% E}{\setMFPfont T}{\setMFPfont A}{\setMFPfont +% P}{\setMFPfont O}{\setMFPfont S}{\setMFPfont T}.\quad} + +\startuseMPgraphic{fuzzycount} + begingroup + save height, span, drift, d, cp ; + height := 3/ 5 * \baselinedistance ; + span := 1/ 3 * height ; + drift := 1/10 * height ; + pickup pencircle scaled (1/12 * height) ; + def d = (uniformdeviate drift) enddef ; + for i := 1 upto \MPvar{n} : + draw + if (i mod 5)=0 : ((-d-4.5span,d)--(+d-0.5span,height-d)) + else : ((-d,+d)--(+d,height-d)) fi + shifted (span*i,d-drift) ; + endfor; + picture cp ; cp := currentpicture ; % for readability + setbounds currentpicture to + (llcorner cp shifted (0,-ypart llcorner cp) -- + lrcorner cp shifted (0,-ypart lrcorner cp) -- + urcorner cp -- ulcorner cp -- cycle) ; + endgroup ; +\stopuseMPgraphic + +\setupMPvariables + [fuzzycount] + [n=10] + +\def\fuzzycount#1% + {{\tx\useMPgraphic{fuzzycount}{n=#1}}} + +\defineconversion[fuzzy][\fuzzycount] + +%%%%%%% + +\setupMPvariables + [EnglishRule] + [height=1ex, + width=\the\localhsize, % without \the, problems in non e-tex + color=darkgray] + +\defineblank + [EnglishRule] + [medium] + +\startuniqueMPgraphic{EnglishRule}{height,width,color} + height = \MPvar{height} ; + x1 = 0 ; x3 = \MPvar{width} ; x2 = x4 = .5x3 ; + y1 = y3 = 0 ; y2 = -y4 = height/2 ; + fill z1..z2..z3 & z3..z4..z1 & cycle withcolor \MPvar{color} ; +\stopuniqueMPgraphic + +\def\EnglishRule% + {\startlinecorrection[EnglishRule] + \setlocalhsize \noindent \reuseMPgraphic{EnglishRule} + \stoplinecorrection} + +%D The following macro returns a tight bound character +%D sequence. +%D +%D \useMPlibrary[txt] +%D +%D \startlinecorrection +%D \TightText{\ss\bf 123}{0cm}{3cm}{red} +%D \stoplinecorrection + +\def\TightText#1#2#3#4% + {\hbox % \ruledhbox + {\startMPcode + picture p ; p := image (graphictext "#1" withfillcolor red) ; + draw p xsized #2 ysized #3 withcolor \MPcolor{#4} ; + \stopMPcode}} + +\protect \endinput |