March 2017 - ntg-context

Presentations with ConTeXt
by MANUEL GONZALEZ SUAREZ 23 Mar '17

23 Mar '17

Hello everyone. I would like to know if there exists in ConTeXt some mechanism similar to LaTeX Beamer to make presentations showing each element step by step. In Beamer the \pause command is used and it is quite simple. Can I have something similar in ConTeXt, simple and easy to use? Thank you Manuel González

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Re: [NTG-context] startstop, narrower and switchtobodyfont gives strange interlinespace
by Andres Conrado 22 Mar '17

22 Mar '17

This works for me, is probably not what you want, but at leat it's consistent (it uses the interline of the main text). \definestartstop[passus][ before={\startnarrower}, after={\stopnarrower}, style={\tfxx}, ] \starttext \subject{It looks OK here:} \input knuth \startnarrower \tfxx \input knuth \stopnarrower \subject{It does also here:} \input knuth \startpassus \input knuth \stoppassus \stoptext Andrés Conrado Montoya http://chiquitico.org

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startstop, narrower and switchtobodyfont gives strange interlinespace
by Mikael P. Sundqvist 22 Mar '17

22 Mar '17

Hi, with the latest standalone, the file below runs, but gives strange results. Look at the interline space in the last paragraph (starting with "But a system...") of the document. It is too big. Resulting pdf is attached. What am I doing wrong? Any ideas to solve it (i.e. to be able to define an environment with narrower smaller text, including a reduced interlinespace)? /Mikael \definestartstop[passus][ before={\startnarrower}, after={\stopnarrower}, style={\switchtobodyfont[9pt]}, ] \starttext \subject{It looks OK here:} \input knuth \startnarrower \switchtobodyfont[9pt] \input knuth \stopnarrower \subject{It does not here:} \input knuth \startpassus \input knuth \stoppassus \stoptext

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disabling specific ligatures
by Csikos Bela 22 Mar '17

22 Mar '17

Dear context users: Is it possible to disable a specific ligature in a whole document in mkiv? I would like to disable fi ligature. Does it make a difference if I use a true type font installed on my system? Thank you in advance, bcsikos

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Re: [NTG-context] \externalfigure locator
by Procházka Lukáš Ing. 22 Mar '17

22 Mar '17

Hello Joseph, thank you for reaction. I guess: - "figures.path' is a ConTeXt variable, is it? - There are more extensions possible, not only .pdf. So how to access other extensions Ctx is to manage? - I guess that 'lpdf.epdf.load(figure_file)' is just a .pdf loader - how to load other pics (like .png, .jpg, .svg...)? Best regards, Lukas On Mon, 20 Mar 2017 09:34:19 +0100, <josephcanedo(a)gmail.com> wrote: > Hi, > > Personally I use the lua variable named : figures.path > > It’s a lua table which contains directories names you provide in directory= in \setupexternalfigures: > > for _, path in ipairs(figures.paths) do > local figure_file = path .. '/' .. file > local doc = lpdf.epdf.load(figure_file) -- assume pdf (just an example) > if doc then > …. > end > done > > There are perhaps helper functions as well. > > Joseph > > De : Procházka Lukáš Ing. > Envoyé le :lundi 20 mars 2017 09:27 > À : ConTeXt > Objet :[NTG-context] \externalfigure locator > > Hello, > > is there a Lua version of external figure locator used by \externalfigure? > > Suppose having: > > ---- > \setupexternalfigures[location={default,local,global},directory={../../Pics}] > \externalfigure[mill] % Finds e.g. in d:\Ctx-Beta\tex\texmf-context\tex\context\sample\common\mill.png > \externalfigure[MyPrettyPicture.jpg] % Finds e.g. in c:\Lukas\Pics\MyPrettyPicture.jpg > ---- > > And I need a function like: > > ---- > \startluacode > local path > > path = assert(ExternalFileLocator("mill") == "d:/Ctx-Beta/tex/texmf-context/tex/context/sample/common/mill.png") > path = assert(ExternalFileLocator("MyPrettyPicture.jpg") == "c:/Lukas/Pics/MyPrettyPicture.jpg") > \stopluacode > ---- > > So what to use in place of "ExternalFileLocator()"? > > TIA. > > Best regards, > > Lukas > > -- Ing. Lukáš Procházka | mailto:LPr@pontex.cz Pontex s. r. o. | mailto:pontex@pontex.cz | http://www.pontex.cz | IDDS:nrpt3sn Bezová 1658 147 14 Praha 4 Tel: +420 241 096 751 (+420 720 951 172) Fax: +420 244 461 038

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about the location of the table in the columns
by Jeong Dal 22 Mar '17

22 Mar '17

Dear all, I want to put a table at the center of the second column. After compiling the code below, the first one(negation part) is appeared right, but the second one(biconditional part) is not the center of the second column. I can not see any difference between two codes. What are wrong in the following code? Best regards, Dalyoung \definefontfamily[mainface][rm][Noto Sans CJK KR][] \definefontfamily[mainface][mm][Neo Euler][] \setupbodyfont[mainface] \setupalign[hanging] \starttext \subsubject{명제의 부정(Negation)} \startcolumns[n=2] 어떤 명제 $p$의 부정은 "$p$가 아니다(not $p$)"이며 "$\neg p$(혹은 $ p$)"로 표현한다. \column \startplacetable[title={부정의 진리표}] {\starttabulate[|c|c|] \HL \NC $p$ \NC $\neg p$\NC\SR \HL \NC T \NC F\NC\AR \NC T \NC T\NC\AR \HL \stoptabulate} \stopplacetable \stopcolumns 다음 명제들의 부정명제를 말해보시오. \startitemize \item $p$: 지금 비가 오고 있다. \item {\red $\neg p$: 지금 비가 오고 있지않다.} \item $q$: -2는 양의 정수이다. \item {\red $\neg q$: -2는 양의 정수가 아니다.} \item $r:\ 3 + 4 = 5$ \item {\red $\neg r:\ 3 + 4 \ne 5$} \stopitemize \subsubject{쌍조건문(Biconditional)} \startcolumns[n=2] $p$이면 $q(p \to q)$인 동시에 $q$이면 $p(q \to p)$를 말하는 것으로 "$p$ if and only if $q$"로 표현하고 $p \ \leftrightarrow\ q$로 표시한다. \column \startplacetable[title={쌍조건명제의 진리표}] {\starttabulate[|c|c|c|] \HL \NC $p$ \NC $q$ \NC $p\leftrightarrow q$\NC\SR \HL \NC T \NC T \NC T \NC\AR \NC T \NC F \NC F \NC\AR \NC F \NC T \NC F \NC\AR \NC F \NC F \NC T \NC\AR \HL \stoptabulate} \stopplacetable \stopcolumns \startitemize \item $p:$ 파리는 영국의 수도이다. \item $q$: 2006년 월드컵에서 대한민국이 16강에 진출했다. \item {\red 파리가 영국의 수도라는 것은 2006년 월드컵에서 대한민국이 16강에 진출하기 위한 필요충분조건이다.} \item $p$는 거짓이고 $q$ 역시 거짓이므로 $p\leftrightarrow q$는 참이다. \stopitemize \stoptext

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sorting languages
by Pablo Rodriguez 21 Mar '17

21 Mar '17

Hans, in the ouput at http://www.ousia.tk/grc-order.pdf, you can see that the vocabulary list, in both Spanish and ancient Greek are wrong sorted. After that, I discovered sort-lan.lua. There must be something else interferring in the sorting, because I read this list in the linked document: κατὰ, ἐκλαλεῖσθαι, κοινώσεσθαι, κρίσιν, κρίσιν, ἐκτὸς, ἐκχωρήσω, ἐλευθέρων, λιθιῶντας (it isn’t following the order in sort-lan.lua). I have two improvements. One is for the Spanish sort order. Accents don’t change sorting order: orders = { "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "ñ", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", } Diacritics don‘t affect to Greek alphabetic sorting. This sort order makes more sense: orders = { "α", "β", "γ", "δ", "ε", "ζ", "η", "θ", "ι", "κ", "λ", "μ", "ν", "ξ", "ο", "π", "ρ", "σ", "σ", "τ", "υ", "φ", "χ", "ψ", "ω", }, Could those be added to ConTeXt? Many thanks for your help, Pablo -- http://www.ousia.tk

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beta
by Hans Hagen 21 Mar '17

21 Mar '17

Hi, The beta has some new font trickery: support for variable fonts. This is still experimental but around the context meeting i expect the user interface etc to be stable. There is a bit of magic involved in the transformations along design axis because not only shapes change but also positional features get influenced (e.g kerning). Variable fonts are defined in the opentype 1.8 standard but there isnot much more known about them. There are a few example fonts already out there. The only reasonable ones i could find were Avenir Next Variable and Adobe Variable Font Prototype (which is a rip off of some other font). I have no clue how well these fonts are because I guess that getting all the features right is not that trivial (so it's hard to decide if something weird is due to the font or to context but we'll get there eventually). Using these fonts should be transparent in the sense that it should just work. As the shapes are transformed along axis the pdf has to get the right stuff and currently there are two methods: inline shapes (it's how i explored things) and native. For native one needs a version of luatex with a trivial extension (most works happens in the font loader) and that version (1.05) will be released on the garden after the tl code freeze (tl will have 1.04). One can force inline shapes but it will be done automatically when one runs a luatex that lacks the small extension needed. Anyway, it provides users a way to play a bit with this new technology so that we can come up with a (maybe more extensive) user interface in context. It also permits WS to adapt his selectfont mechanism. \definefontfeature [default:shaped] [default] [axis={width:900,weight:100}] \definefont [SomeFont] [name:avenirnextvariable*default] \SomeFont \input ward\par \definefont [SomeFont] [name:avenirnextvariable*default:shaped] \SomeFont \input ward\par \definefont [SomeFont] [name:avenirnextvariableregular*default] \SomeFont \input ward\par \definefont [SomeFont] [name:avenirnextvariablemedium*default] \SomeFont \input ward\par \definefont [SomeFont] [name:adobevariablefontprototypeextralight*default] \SomeFont \input ward\par \definefont [SomeFont] [name:adobevariablefontprototypelight*default] \SomeFont \input ward\par etc etc So, one can either use a predefined instance or ask for a user defined instance. The s-fonts-variable.mkiv style can be used to identify proprties, as can mtxrun --script font --list --pattern=aven* --info which returns, among other things mtx-fonts | mtx-fonts | instances : regular medium bold heavy condensed mediumcondensed boldcondensed heavycondensed mtx-fonts | So, keep in mind that it's experimental and will evolve in sync with my understanding of what the standard expects. Hans ----------------------------------------------------------------- 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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\savebuffer to merge of save contents
by Jaroslav Hajtmar 21 Mar '17

21 Mar '17

Hello ConTeXist. Is there any possibility or modifications that will allow to savebuffer to work, so that will add (merge) the buffer contents into a file (Which content of the previous buffer)? For inspiration, it is possible use a solution that wrote before year ago Wolfgang for Lukas Prochazka – ie https://mailman.ntg.nl/pipermail/ntg-context/2016/087657.html Thanx Jaroslav Hajtmar Here is source code of Wolfgangs solution: \unexpanded\def\startcontentexport {\dosingleempty\dostartcontentexport} \def\dostartcontentexport[#1]% {\iffirstargument \edef\contentexportfile{#1}% \else \let\contentexportfile\empty \fi \grabbufferdata[contentexport][startcontentexport][stopcontentexport]} \def\stopcontentexport {\doifsomething{\contentexportfile}{\savebuffer[list=contentexport,prefix=no,file=\contentexportfile]}% \getbufferdata[contentexport]} \starttext A \startcontentexport[Test.mkiv] Basic content … \startitemize \item Item \stopitemize \stopcontentexport B \startcontentexport[Test.mkiv] Add this text into Test.mkiv file \startitemize \item Item \stopitemize \stopcontentexport C \startcontentexport[Test.mkiv] And this text add into Test.mkiv file too. \startitemize \item Item \stopitemize \stopcontentexport \stoptext

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closesymbol on same line as displayed formula
by Mikael P. Sundqvist 21 Mar '17

21 Mar '17

Hi, I'm bringing up an old question on placing the qedsymbol, or closesymbol as it is also called. This was previously discussed in https://mailman.ntg.nl/pipermail/ntg-context/2014/079807.html and the purpose of this post is to ask if there is any solution to the problem now. Looking at the file below (output is attached), when the proof ends with a displayed formula, the closesymbol is located one row down. I want it to be (flushright) on the same line as the displayed formula. If I use \placeclosesymbol the closesymbol is indeed put on the correct line, but not flushright. Any ideas? I'm willing to use some command like \placeclosesymbol in the occations when the proof ends with a displayed formula. /Mikael \defineenumeration[proof][ number=no, text=Proof, headstyle={\it}, alternative=serried, width=fit, closesymbol={$\square$}, ] \starttext \startproof This is a short proof. \stopproof \startproof This is another short proof, ending with the formula \startformula 1+1=2. \stopformula \stopproof \startproof This is another short proof, ending with the formula \startformula 1+1=2.\placeclosesymbol \stopformula \stopproof \startproof This is a rather advanced proof, ending with formulas \startformula \startalign \NC 1+1 \NC = 2,\NR \NC 2+2 \NC = 4.\NR \stopalign \stopformula \stopproof \startproof This is a rather advanced proof, ending with formulas \startformula \startalign \NC 1+1 \NC = 2,\NR \NC 2+2 \NC = 4.\placeclosesymbol\NR \stopalign \stopformula \stopproof \stoptext

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