May 2020 - ntg-context - NTG Mailing Lists

What does the exporter try to tell me.
by Christoph Hintermüller 18 May '20

18 May '20

Hi I'm trying to improove the T-vim module such that it is also working properly in xml export setup. In the current ConTeXt standalone the exporter tries to tell me something when reporting "possible paragraph mixup" at any character followoing the first paragraph. And no output from the code block between start<>stop. I got that far that it has to do something with the redefinitoin of end of line chars or alike in the code behind and between the package specific start<> and stop<> commands. But i do not catch what the exporter trying to yell at me. So what additoinal trackers exempt the ones registered by the exporter do i have to activate to see what the exporter has to process on? What documentation should i read before continueing? What hast to be done inside the start stop, `\obeyline` etc macros to ensure the exporter is provided with a proper document sturcuture/tree which can be properly and flawlessly processed. All tex commands which should be reflected in the xml output by tags include inside their code `\starttagged` and `\stoptagged` commands but my impression is that something important the exporter needs to have any chance to gnereate porper clean output is missing and I'm missign any clue what and where to startoff. Best Xristoph (Hernot)

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What is required to make \setuplayout work?
by Gerben Wierda 17 May '20

17 May '20

I’ve been trying to define a layout that just has a 5mm no-printing edge around the paper and has all the rest for \textwidth and \textheight. No header, footer, pagenumber, etc. Just as much space as I can get out of a standard A4. But the following (following the manual and ConTeXtgarden): \setuplayout[leftedge=5mm,top=5mm,rightedge=5mm,bottom=5mm, leftmargin=0mm,rightmargin=0mm, margindistance=0mm,edgedistance=0mm, topdistance=0mm,headerdistance=0mm,footerdistance=0mm,bottomdistance=0mm] \showlayoutcomponents % doesn’t seem to do anything \showframe % this works \starttext \input knuth \stoptext Doesn’t seem to change the layout. What am I missing? G

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Custom list layout with PDF bookmarks
by Bruce Horrocks 17 May '20

17 May '20

When I customise the table of contents layout I lose the automatic hyperlinks. Is there a simple configuration option that I have missed or do I need to create my own links somehow? Example: \setupinteraction[state=start] \setupinteractionscreen[option=bookmark] \define[3]\SectionListEntry {\par \leftaligned\bgroup \hbox to 2em{#3}% \hskip 1em \vtop{\hsize\dimexpr\textwidth-3em\relax#2} \egroup \par} % Comment out this next line to regain section hyperlinks in the ToC \setuplist[section][alternative=command,command=\SectionListEntry] \starttext Table of Contents \placecontent[criterium=all] \placebookmarks[chapter,subject] \chapter{Tufte} \section{Section 1} \input tufte \page \section{Section 2} \input tufte \page \section{Section 3} \input tufte \page \stoptext Thanks in advance. -- Bruce Horrocks Hampshire, UK

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does font expansion break -char.width?
by Pablo Rodriguez 17 May '20

17 May '20

Dear list, in this sample for underscore hyphenation (which comes from Hans), font expansion breaks char.width and displaces the underscore: \startluacode function document.addfunnyhyphen(tfmdata) local underscore = utf.byte("_") local char = tfmdata.characters[underscore] if not char then return end tfmdata.characters[0xFE000] = { width = 0, height = 0, depth = 0, commands = { { "right", -char.width }, { "down", char.depth }, { "slot", 1, underscore }, } } end utilities.sequencers.appendaction("aftercopyingcharacters", "after","document.addfunnyhyphen") \stopluacode \definehyphenationfeatures [underscore] [righthyphenchar="FE000] \setuphyphenation [method=traditional] \unexpanded\def\sha#1% {\begingroup\tt \sethyphenationfeatures[underscore]% #1% \endgroup} \definefontfeature[default][default][expansion=quality] \setupalign[hanging, hz] \definefontfamily[mainface][tt][Cousine][scale=0.85] \setupbodyfont[mainface] \starttext \hsize\zeropoint \sha{\dorecurse{25}{asdfasdfasdfaeasfae}} \stoptext I’m using latest from 2020.05.12 16:21. Have I hit a bug or am I missing something? Many thanks for your help, Pablo -- http://www.ousia.tk

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Building a page based on exact location of graphical elements (PDF)
by Gerben Wierda 17 May '20

17 May '20

What is the simplest way to build a page based on positioning of external images? Some of these images are page-sized (so take up an entire page, though I might want to overlay some other text boxes and MP graphics). I’ve been trying to find a good explanation/introduction into layers (which I think ConTeXtgarden says I should use) but haven’t found one. G

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Arithmetic Overflow error in MetaFun
by Keith McKay 17 May '20

17 May '20

Colleagues I'm having problems with an Arithmetic Overflow error when calculating the x and y values for functions of the form: y = ax^4 + bx^3 + cx^2 + dx + e to which I then add a bit of randomness and other embellishments. I have had a look in the Metafun and Metafont manuals but nothing jumps out at me. In the minimum working example below, this Arithmetic Overflow occurs when xord =13.5 but I can get the calculation to work if I separate out the equation and then add together, since it seems to be failing on the pow(xord,4) instruction. Is there a switch in MetaFont that should be set or a better way of getting round this Arithmetic Overflow error? Thanks Best Wishes Keith McKay %%%%%%%%%%%%%MWE%%%%%%%%%%% \setuppapersize [A4,landscape] \starttext \startMPpage StartPage; width := PaperWidth ; height := PaperHeight ; unit := cm ; path p; p := unitsquare scaled .1cm ; path pat; pat := (0.0*cm,19.935*cm); for xord = 0 step 0.1 until 25: show xord; %%%%%%%%fails at xord = 13.5%%%%%%%%% yord := ((-0.000268117) * pow(xord,4)) +(0.0136949 * pow(xord, 3)) + ((-0.16608) * sqr(xord)) + ((-0.771743) * xord) + 19.935; %%%%%comment out above and uncomment below and it works%%%% % yord1 := (-0.000268117) * sqr(xord); % yord1a := yord1 * sqr(xord); % yord2 := (0.0136949 * pow(xord, 3)); % yord3 := ((-0.16608) * sqr(xord)); % yord4 := ((-0.771743) * xord); % yord := yord1 + yord1a + yord2 + yord3 + yord4 + 19.935; xrand := (uniformdeviate(1) - 0.5)*2; yrand := uniformdeviate(1) - 0.5; xcoord := xord + xrand; ycoord := yord + yrand; if odd xord: pat := pat ... (xcoord*cm, ycoord*cm); else: pat := pat --- (xcoord*cm, ycoord*cm); fill p shifted (xcoord*cm, ycoord*cm) withcolor (uniformdeviate(1),uniformdeviate(1),uniformdeviate(1)) ; fi; draw pat withpen pencircle scaled (uniformdeviate(0.75)*mm) withcolor (uniformdeviate(1),uniformdeviate(1),uniformdeviate(1)); %withtransparency (1, .5); drawdot (xcoord*cm, ycoord*cm) withpen pencircle scaled (uniformdeviate(2.5)*mm) withcolor (uniformdeviate(1),uniformdeviate(1),uniformdeviate(1)); endfor; StopPage; \stopMPpage \stoptext

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Blank page added after pagecolumns
by Joey McCollum 16 May '20

16 May '20

I am typesetting a document using pagecolumns to ensure that my footnotes are set ragged-bottom in columns. I have observed some unexpected behavior whenever the last column on a page is left incomplete: a blank page is added at the end of the document. A minimal working example follows: ``` \starttext \startpagecolumns[n=2] \dorecurse{3}{\par\input zapf} \stoppagecolumns \stoptext ``` I typeset this using ConTeXt version 2020.03.10, as released with TeXLive 2020. Notably, if \dorecurse{3} is changed to \dorecurse{2} or \dorecurse{6} (so that the text ends in the first column of a page), then there is no problem. I have tried to fix this by specifying page=no in the \startpagecolumns arguments, but it did not change anything. Is there something else I am missing? Thank you, Joey

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\goto not working from within \textext()
by Gerben Wierda 16 May '20

16 May '20

This does give me ythe look of a link, but not a working link. Outside of textext() it works. Is there a way to get a working link in a MetaFun picture? Thx, G \setupinteraction [state=start, color=blue, style=bold] \starttext \goto{works}[url(https://ea.rna.nl/2011/06/05/on-the-use-of-colours-in-archimate/)] \setupMPpage [background=color, backgroundcolor=gray] \startMPpage[instance=doublefun] draw textext("\goto{doesn’t work}[url(https://ea.rna.nl/2011/06/05/on-the-use-of-colours-in-archimate/)]"); \stopMPpage \stoptext

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--nodates not working
by Pablo Rodriguez 15 May '20

15 May '20

Dear list, the “LuaMeTaTeX Reference Manual” describes that the command line argument "--nodates" removes time dependent information in the output file. I’m afraid it doesn’t work. "\enabledirectives[backend.date=no]" doesn’t work either. This is really useful to be able to generate the exact PDF output (from a hashing point of view). Am I missing something or have I hit a bug? Many thanks for your help, Pablo -- http://www.ousia.tk

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page number with brief centered line above
by jbf 14 May '20

14 May '20

Hi list, I am trying to achieve a layout where there is a brief line above the bottom-centered page number (of a double-sided document). I am able to achieve the centered bottom-located page number easily and obviously enough with: \setuppagenumbering [alternative=doublesided,location={footer,middle}] \setupfooter [style=bold] And I was able to achieve a result with a short line above where the page number should be - but by adopting the solution below I have now lost the page number. \setuppagenumbering [alternative=doublesided,location={footer,middle}] \setupfootertexts[{\framed[frame=off,topframe=on,width=.5\textwidth]}] So then I thought that having left out any reference to page numbers I had better put it in, so I added [pagenumber] to the above, but I ended up with two page numbers, one centered, the other to the inner or outer margins (depending on recto/verso), and the line was likewise to the right or left of the centred number. So clearly not what I want. Maybe the solution lies with some combination of the above I haven't thought of, or maybe there is another solution altogether. Any thoughts? Julian

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