diff options
Diffstat (limited to 'tex/context/base/mkiv/meta-imp-txt.mkiv')
| -rw-r--r-- | tex/context/base/mkiv/meta-imp-txt.mkiv | 219 |
1 files changed, 62 insertions, 157 deletions
diff --git a/tex/context/base/mkiv/meta-imp-txt.mkiv b/tex/context/base/mkiv/meta-imp-txt.mkiv index b2a6d6d1d..56da9229d 100644 --- a/tex/context/base/mkiv/meta-imp-txt.mkiv +++ b/tex/context/base/mkiv/meta-imp-txt.mkiv @@ -11,15 +11,12 @@ %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 In this library some handy text manipulations are defined. Some can and will be +%D improved as soon as the \TEX||\METAPOST\ interface is stable. Some of the +%D solutions may look weird, which is entirely my fault, since I implemented them in +%D the process of getting grip on this kind of manipulations. Undoubtly better +%D \METAPOST\ code is possible, but my way of learning this kind of trickery happens +%D to be by \quote {trial and error} and \quote {look and feel} (as well as %D identifying tricks in Hobby's code). % textext ipv btex ... etex @@ -30,112 +27,102 @@ \definesystemvariable {sh} % ShapedText .. todo: commandhandler +\unexpanded\def\setupshapetexts + {\dodoubleempty\getparameters[\??sh]} + +\setupshapetexts + [\c!bodyfont=] + \startMPextensions loadmodule "text" ; \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 +\ifdefined\parwidth \else + \newdimen\parwidth + \newdimen\parheight + \newdimen\parvoffset + \newdimen\parhoffset + \newcount\parlines + \newtoks \partoks + \newbox \shapetextbox + \newcount\parfirst +\fi \unexpanded\def\startshapetext[#1]% {\global\newcounter\currentshapetext \global\setbox\shapetextbox\vbox\bgroup - \expanded{\switchtobodyfont[\@@shbodyfont]}% + \switchtobodyfont[\@@shbodyfont]% \dontcomplain \hsize\parwidth \setuptolerance[\v!verytolerant,\v!stretch]% - \!!counta\zerocount - \!!toksa\emptytoks + \scratchcounter\zerocount + \scratchtoks\emptytoks \def\docommand##1% {\setbox\scratchbox\hbox{\useMPgraphic{##1}}% - \global\chardef\parfirst\zerocount - \getMPdata % \readlocfile{\MPdatafile}{}{}% + \global\parfirst\zerocount + \getMPdata \setshapecharacteristics - \advance\!!counta by \parlines - \expandafter\appendtoks\the\partoks\to\!!toksa}% + \advance\scratchcounter by \parlines + \expandafter\appendtoks\the\partoks\to\scratchtoks}% \processcommalist[#1]\docommand - \global\parseriestrue - \xdef\totalparlines{\the\!!counta}% - \global\partoks\!!toksa - %\ifx\partoks\emptytoks\else % safeguard - \expanded{\parshape \the\!!counta \the\!!toksa}% - %\fi + \xdef\totalparlines{\the\scratchcounter}% + \global\partoks\scratchtoks + \parshape \the\scratchcounter \the\scratchtoks\relax \setshapecharacteristics % extra dummy - \ifparseries\def\par{\endgraf\adaptparshape}\fi - \EveryPar{\begstrut}} + \def\par{\endgraf\adaptparshape}% + \everypar{\begstrut}} \unexpanded\def\stopshapetext {\endstrut - %\removebottomthings \egroup \global\newcounter\currentshapetext \getshapecharacteristics} \unexpanded\def\adaptparshape {\def\docommand##1% - {\ifcase\!!counta - \expandafter\appendtoks\space##1 \to\!!toksa + {\ifcase\scratchcounter + \expandafter\appendtoks\space##1 \to\scratchtoks \else - \advance\!!counta \minusone + \advance\scratchcounter\minusone \fi}% - \!!counta\prevgraf - \doglobal\decrement(\totalparlines,\!!counta)% - \multiply\!!counta \plustwo - \!!toksa\emptytoks + \scratchcounter\prevgraf + \doglobal\decrement(\totalparlines,\scratchcounter)% + \multiply\scratchcounter\plustwo + \scratchtoks\emptytoks \expanded{\processseparatedlist[\the\partoks][\space]}\docommand - \global\partoks\!!toksa - %\ifx\partoks\emptytoks\else % safeguard - \expanded{\parshape\totalparlines\the\partoks}% - }%\fi} + \global\partoks\scratchtoks + \parshape\totalparlines\the\partoks\relax} \unexpanded\def\getshapecharacteristics {\doglobal\increment\currentshapetext \doifelsedefined{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}} + {\getvalue{parlines:\currentshapetext}} + {\global\parlines \plusone + \global\parfirst \zerocount + \global\parvoffset\zeropoint + \global\parhoffset\zeropoint + \global\parwidth \hsize + \global\parheight \vsize}} \unexpanded\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}} + \setxvalue{parlines:\currentshapetext}% + {\global\parlines \the\parlines + \global\parfirst \the\parfirst + \global\parvoffset\the\parvoffset + \global\parhoffset\the\parhoffset + \global\parwidth \the\parwidth + \global\parheight \the\parheight}} \unexpanded\def\getshapetext % option: unvbox {\vbox\bgroup \forgetall \dontcomplain \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 + {\switchtobodyfont[\@@shbodyfont]% + \splittopskip\strutheight + \vskip\parvoffset + \ifcase\parfirst\else\vskip\lineheight\fi \hskip\parhoffset \hbox{\vsplit\shapetextbox to \parlines\lineheight}}% \wd\scratchbox\parwidth @@ -145,89 +132,8 @@ \getshapecharacteristics \egroup} -\unexpanded\def\setupshapetexts - {\dodoubleempty\getparameters[\??sh]} - -\setupshapetexts - [\c!bodyfont=] - \doifundefined{RotFont}{\definefont[RotFont][RegularBold*default]} -% \startuseMPgraphic{followtokens} -% % we default to nothing -% \stopuseMPgraphic - -% \unexpanded\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} -% -% \unexpanded\def\dofollowtokens#1#2% -% {\vbox\bgroup -% \forgetall -% \dontcomplain -% \doifundefined{RotFont}{\definefont[RotFont][RegularBold*default]}% -% \MPtoks\emptytoks -% \resetMPdrawing -% \startMPdrawing -% \includeMPgraphic{followtokens} ; -% picture pic[] ; numeric len[], n ; n := 0 ; -% \stopMPdrawing -% \handletokens#2\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, pc, 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 ; -% if \number#1 = 1 : -% pl := (al-len[n])/(if n>1 : (n-1) else : 1 fi) ; -% pc := 0 ; -% else : % centered / MP -% pl := 0 ; -% pc := arclength RotPath/2 - len[n]/2 ; -% 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 + pc ; -% 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} - \unexpanded\def\getfollowtoken#1% {\hbox\bgroup \strut @@ -479,8 +385,7 @@ \setlocalhsize \noindent \reuseMPgraphic{EnglishRule} \stoplinecorrection} -%D The following macro returns a tight bound character -%D sequence. +%D The following macro returns a tight bound character sequence. %D %D \useMPlibrary[txt] %D |