April 2020 - ntg-context - NTG Mailing Lists

\placelist[chapter][counter=realpage] not working
by Pablo Rodriguez 11 Apr '20

11 Apr '20

Dear list, here you have the following sample: \setuppapersize[A6] \setupuserpagenumber[way=chapter] \starttext \placelist[chapter][counter=realpage] \dorecurse{5}{\chapter{Chapter}} \stoptext Why doesn’t \placelist[chapter] use the realpage counter? According to i-context.pdf, \placelist inherits from \setuplist (which also inherits from \setupcounter). I really need that, since the document I’m composing needs chapter and part page numbering independent from the whole document page numbering. Am I missing something or have I hit a bug? Many thanks for your help, Pablo -- http://www.ousia.tk

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running lua in metafun and in ConTeXt
by Jeong Dal 11 Apr '20

11 Apr '20

Dear all, I draw Pascal’s triangle with the label of each point created by using lua functions. As you see in the code below, I defined fact(n) and combi(n,r) using lua. For the calculation tt, I used two different methods. Both are working well when I run the given code. But I got an error, when I added this code to a ConTeXt file composed product and components, and using the second method, i.e. combi(n,r). The first method is still working well. The error message is as following: metapost log > loading metafun, including plain.mp version 1.004 for metafun iv and xl metapost log > luatex warning > mplib: run script: [string "return mp.print(combi(0,0 ))"]:1: attempt to call a nil value (global 'combi') metapost log > >> tt metapost log > >> vacuous metapost log > ! Equation cannot be performed (numeric=vacuous). metapost log > <to be read again> metapost log > ; metapost log > <for(0)> ...&decimal(0)&","&decimal(EXPR0)&" ))"); metapost log > now:=start+(EXPR0)*right*d... metapost log > <for(0)> ....now--(now+A);draw.now--(now+B);endfor metapost log > ; ENDFOR metapost log > <*> ...now+A); draw now -- (now+B); endfor; endfor metapost log > ;; I don’t know why the same code treated differently. I think that I have to do something more in luacode which I don’t know. Comments are wellcome! Best regards, Dalyoung %%%%%%% \startluacode function fact (n) if n <= 0 then return 1 else return n * fact(n-1) end end function combi(n,r) return fact(n)/(fact(r)*fact(n-r)) end \stopluacode \startbuffer[fig121] numeric n,r,s,u,dx,dy,tt; u := 1.8cm; path p, q; pair A,B,start,now; A := dir(210)*u; B := dir(-30)*u; dy := sind(30)*u; dx := 2*cosd(30)*u; for n=0 upto 4: start := n*dir(210)*u; for r=0 upto n: s := n-r; % tt := lua("mp.print(fact(" & decimal n & ")/(fact(" & decimal r & ")*fact(" & decimal s &" )))"); tt := lua("mp.print(combi(" & decimal n & "," & decimal r & " ))"); now := start+r*right*dx; dotlabel.top(textext("$\displaystyle {" & decimal n & "\choose" & decimal r & "} = "& decimal tt & "$"),now); draw now -- (now+A); draw now -- (now+B); endfor; endfor; \stopbuffer \starttext \switchtobodyfont[11pt] \processMPbuffer[fig121] \switchtobodyfont[12pt] \stoptext

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Geometric math symbols in Lucida OT
by Tim Steenvoorden 11 Apr '20

11 Apr '20

Hi all, I decided to switch to Lucida OpenType, but now I’ve another problem. In the Type1 variant, all geometric shapes (\square, \triangleright, \blacktriangleright, etc.) had the same size as math operators (\boxplus, \boxdot). This appears not to be the case any more in the OpenType variant, they are way too big! (See attachment.) Pagella and Latin Modern do this right. Is this a font issue or a ConTeXt issue? Anything I can do about this without redefining every symbol I need by hand? Cheers, Tim \startproduct test \setupbodyfont[lucidaot,10pt] $\square\boxtimes$ \stopproduct

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xhtml export internal command \dostarttaging modify display and other XML/XHTML attributes
by Christoph Hintermüller 10 Apr '20

10 Apr '20

Hi I'm helping to make t-vim module fully usable in xhtml and futher epub export. Getting a distingct tag for the individual lines was quiet easy to do using \dostarttagged and \dostoptagged internal macros. What i'm not able to figure are the following things: 1) How can i set/modify the display attribute of the resulting div.myclass section in the generated *_templates.css file. Per default the display attribute is set to "inline" while i need "block" or "flex" (not jet decided" which). 2) How can i predefine the white-space css attribute to pre-wrap 3) Is there a way to tell context to include the resulting class inside the *.default.css or *.styles.css or should that be done via the css parameter of the \setupbackend macro only? Best Xristoph

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mp strings
by Hans Hagen 10 Apr '20

10 Apr '20

Hi, The *next* lmtx upload (one of these days) will have a small extension to the mp library wrt strings. In order to be more " neutral the string can be bound by STX/EOT characters (enabled by default). In addition to that there is also an option to set the catcode regime. The combination of these permits passing and processing strings as-they-are. Just in case the Gerbens among us need it. Hans ==================== example ===================== \startTEXpage \def\foo{x} \framed{\startMPcode interim catcoderegime := vrbcatcoderegime ; draw textext("stream $\string\foo$") withcolor "darkred" ; \stopMPcode} \framed{\startMPcode draw textext("stream $\foo$") withcolor "darkblue" ; \stopMPcode} \startlmtxmode % here the string starts with ascii code 2 (STX) and ends with % ascii code 3 (EOT) ... visibility depends on the editor and % font used; these are normally not used and therefore nice % alternative string capsules \framed{\startMPcode interim catcoderegime := vrbcatcoderegime ; draw textext(stream $\string\foo$) withcolor "darkgreen" ; \stopMPcode} \framed{\startMPcode draw textext(stream $\foo$) withcolor "darkyellow" ; \stopMPcode} \stoplmtxmode \stopTEXpage ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------

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METAPOST/MetaFun withtransparency doesn't accept my pair primary argument, what am I doing wrong?
by Gerben Wierda 10 Apr '20

10 Apr '20

I have refactored my code to use withtransparency and separate parameters for colors, sizes, transparency, etc. But I’m running into a problem. The fillTransparency parameter is a pair primary (as can be seen from the show command) Here is a pretty minimum example (in reality there are multiple colors and transparencies passed on): \starttext \startMPpage[instance=doublefun] vardef Foo( expr w, h, fillColor, fillTransparency) = show "FOO:", w, h, fillColor, fillTransparency; save pic; picture pic; save circ; path circ; circ := (fullcircle xyscaled (h,h)); pic := image ( fill (circ shifted (w-h/2,-h/2)) withcolor fillColor withtransparency fillTransparency; ); pic enddef; pic := Foo( 150, 50, (0.686,1.000,1.000), (1,1.000)); draw pic; \stopMPpage \stoptext and the result is: metapost log > >> "FOO:" metapost log > >> 150 metapost log > >> 50 metapost log > >> (0.68600000000000005,1,1) metapost log > >> (1,1) metapost log > ! Missing argument to withtransparency. metapost log > <to be read again> metapost log > ((1,1)) metapost log > <argument> ...0000005,1,1))withtransparency((1,1)) metapost log > ; metapost log > image->...ture;currentpicture:=nullpicture;(TEXT3) metapost log > ;currentpicture.if.str(SUF... metapost log > metapost log > Foo->...)withcolor(EXPR4)withtransparency(EXPR5);) metapost log > ;pic.endgroup metapost log > <*> ...o( 150, 50, (0.686,1.000,1.000), (1,1.000)) metapost log > ; draw pic; ; What am I doing wrong here? Thanks, G PS. Given the complaint about asking both here and on tex.stackexchange, which of the two is the best place?

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Float positioning
by Alexey Kryukov 09 Apr '20

09 Apr '20

Hi all, Suppose I have the following document: \setupexternalfigures[location={local,default}] \starttext \dorecurse{3}{\input{knuth}} \placefigure[top]{cow}{\externalfigure[cow][width=150mm]} \input{knuth} \placefigure[page]{one more cow}{\externalfigure[cow][width=150mm]} \placefigure[page]{cow again}{\externalfigure[cow][width=150mm]} \dorecurse{10}{\input{knuth}} \stoptext Here I would expect the text flow to continue below the first image, and then two more images to be positioned on separate pages. Instead I get no text at all at the page with the Figure 1 and one more blank page after it. Only after the last image the text flow continues. Since similar situations are very common for documents which contain several large illustrations, I would like to know if there are any workarounds for the problem. -- Regards, Alexey Kryukov <anagnost at yandex dot ru> Moscow State University Faculty of History

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using realpagenumber for /PageLabels
by Pablo Rodriguez 09 Apr '20

09 Apr '20

Dear list, I have the following sample: \setupuserpagenumber[way=chapter] \starttext \dorecurse{5}{\chapter{Chapter}} \stoptext I need to restart user page numbers in each part (I use real page to number the complete document). But the main problem is this way also restarts pages in the final PDF document (/PageLabels). Is there any way that I can use real pages instead of user pages for /PageLabels in the PDF document? Many thanks for your help, Pablo -- http://www.ousia.tk

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Why does this example from the MetaFun manual not work?
by Gerben Wierda 09 Apr '20

09 Apr '20

I would like to use the result of transparent() straight in my macros, so I can pass the colors with transparency using a single parameter. That should be possible if I understand the MetaFun manual (where I’ve copy-pasted this example from): \starttext \startMPpage[instance=doublefun] vardef SampleText (expr t, c) = save p ; picture p ; p := image (draw t infont "\truefontname{Regular}") ; draw (p shifted (- xpart center p,0)) scaled 5 withcolor c; enddef ; SampleText ("Much Of This" , transparent(1, .5, red )) ; SampleText ("Functionality" , transparent(1, .5, green)) ; SampleText ("Was Written" , transparent(1, .5, blue )) ; SampleText ("While Listening", transparent(1, .5, cmyk(1,0,0,0))) ; SampleText ("To the CD's Of" , transparent(1, .5, cmyk(0,1,0,0))) ; SampleText ("Tori Amos" , transparent(1, .5, cmyk(0,0,1,0))) ; \stopMPpage \stoptext But it results in: system > files > jobname 'testcolor', input './testcolor', result 'testcolor' fonts > latin modern fonts are not preloaded languages > language 'en' is active open source > level 2, order 3, name './testcolor.tex' fonts > preloading latin modern fonts (second stage) fonts > 'fallback modern-designsize rm 12pt' is loaded metapost > initializing instance 'doublefun:1' using format 'metafun' and method 'double' metapost > loading 'metafun' as '/usr/local/context-osx-64/tex/texmf-context/metapost/context/base/mpiv/metafun.mpxl' using method 'double' metapost > initializing number mode 'double' metapost log > metapost log > loading metafun, including plain.mp version 1.004 for metafun iv and xl metapost log > metapost log > ! Missing ')' has been inserted. metapost log > <to be read again> metapost log > withprescript metapost log > transparent->(1)withprescript metapost log > "tr_alternative="&decimal.transparency_alternat... metapost log > <*> ... ("Much Of This" , transparent(1, .5, red ) metapost log > ) ; SampleText ("Functiona... metapost log > backend > xmp > using file '/usr/local/context-osx-64/tex/texmf-context/tex/context/base/mkiv/lpdf-pdx.xml' pages > flushing realpage 1, userpage 1, subpage 1 close source > level 2, order 3, name './testcolor.tex' close source > level 1, order 3, name 'cont-yes.mkiv' For me, it is not about passing colour on to ConTeXt to typeset text, these are colors that normally would be drawn with “withcolor ca withtransparency (method,factor)” but that requires the passing of many more parameters and a lot more work in coding. Does transparent() maybe produce a string that looks like “ca withtransparency (method,factor)” so something only usable in draw/fill/etc statements? But in that case how does that work without scantokens to parse the string? Is there a way I can do this without having twice the parameters (and I have to pass multiple colours) in my macros everywhere? Thanks, G

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Short weekday option for date command
by Adam Reviczky 08 Apr '20

08 Apr '20

Hi, Is there a way to achieve a short weekday option with \date[] to get 3 letter equivalents (Mon, Tue, Wed, Thu, Fri, Sat, Sun) similar to the monthshort either through context or lua? Thanks, Adam

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