May 2020 - ntg-context - NTG Mailing Lists

Unicode chars and \insertpages (Win7)
by Pablo Rodriguez 31 May '20

31 May '20

Dear list, I have the following sample: \startext \insertpages[ξ_file.pdf] \stoptext Using latest on Linux, it works perfectly fine. On Windows (I’m still on Win7), it doesn’t work unless I replace "ξ" with an ASCII character. Could this be fixed or is it really a limiatation of Windows? Many thanks for your help, Pablo -- http://www.ousia.tk

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Bar within math
by context＠vivaldi.net 30 May '20

30 May '20

Hello, it seems that bar (even with option 'continue=yes') is not rendered in place of '~' within math. See the sample: ---- \definebar[MyBar][color=green,rulethickness=2.8,order=background,offset=1.5,continue=yes] \starttext 1 + 2 = \startbar[MyBar]3~kN\stopbar $1 + 2 = \startbar[MyBar]3~\text{kN}\stopbar$ \stoptext ---- In the sample 'kN' is a unit, which should be separated by space from the result (here: 3); I am used to put the unit into the math environment and enclose it into \text{...}. Is there a way to make the bar be rendered in places of blanks within math, too (like if it was inside $ ... $ - as the first line of the sample)? Or is there a better way to add an unbroken background to a (part of) math expression followed by a text (unit)? Best regards, Lukas

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A simpler way to install LMTX in macOS Catalina
by Nicola 30 May '20

30 May '20

Today I wanted to try LMTX and I have found these instructions in the wiki: https://wiki.contextgarden.net/Installing_ConTeXt_LMTX_on_MacOS Rather than disabling SIP, I have proceeded as follows: 1. Download macOS's version of LMTX from https://wiki.contextgarden.net/Installation 2. Unpack 3. cd context-osx-64 4. xattr -d com.apple.quarantine bin/mtxrun 5. sh ./install.sh Point 4 is important to avoid the dialog "mtxrun cannot be opened because the developer cannot be verified." Of course, it would be better if the binary were signed... Nicola

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Math delimiters across math alignment environments
by Jairo A. del Rio 29 May '20

29 May '20

Hi dear list! I have a question about the use of delimiters. There are commands as \left ... \right which allow delimiters of variable size, but they are usually asymmetrical. AFAIK, ConTeXt has mechanisms of the form \definemathfence[something][something][command=yes]. My question is: is it possible to make math fences work in a math alignment, e.g. \definemathfence[something][brace][command=yes] \startformula \startmathalignment[n=2,align={middle,middle}] %This won't work (I didn't expected to work, anyway) \NC \NC \something{\frac{1}{2} + \NR \NC \NC x} \NR \stopmathalignment \stopformula so that the fences are the same size? Thank you in advance. Stay safe. Jairo <3

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Checking existence of a macro (control sequence) by Lua
by context＠vivaldi.net 29 May '20

29 May '20

Hello, is it possible to check whether a macro exists (or - is it a non-\undefined control sequence) with Lua? Suppose: ---- \starttext \def\MyMacro{Ahoj} \def\MyMac#1#2{Something} \startluacode IsDefined = function(ctl_seq) print("CS " .. ctl_seq .. (tex.IsCS(ctl_seq) -- Or what to come here? "is defined" or "is unknown") .. ".") end -- So the function should print to the console: IsDefined("MyMacro") --> "CS MyMacro is defined." IsDefined("MyMac") --> "CS MyMac is defined." IsDefined("bf") --> "CS bf is defined." IsDefined("dummy") --> "CS dummy is unknown." \stopluacode \stoptext ---- Is it possible? Best regards, Lukas

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Let chapter start on odd page and make the even page before show an image
by juh 29 May '20

29 May '20

Dear all, with your help I can colorize the empty even page right before a chapter starts on the odd page. The mwe below shows it. Now I would like to redefine the contents of the left page on the fly in the text so that I could place images on this page. I thought that I could get a simple solution by inserting a TEXpage as even page, but this does not work for several reasons. First a TEXpage is not counted correctly like a normal page. And secondly I found now way to put it on the even page. So what I really want to achieve is a way to redefine this setups at some point in the text to insert eg. a picture on the even page before a chapter. \startsetups [chapter:before] \doifoddpageelse {} {\pushbackground[page] \setupbackgrounds[page][background=color,backgroundcolor=blue,] \page[empty,right] \popbackground} \stopsetups Here comes the not so mwe: %% start mwe \setuplayout [ location=doublesided ] \setuppagenumbering[alternative=doublesided] \definepagebreak [chapter] [footer,yes,header,footer,right] \startsetups [chapter:before] \doifoddpageelse {} {\pushbackground[page] \setupbackgrounds[page][background=color,backgroundcolor=blue,] \page[empty,right] \popbackground} \stopsetups \setuphead [chapter] [ page=yes, before=\directsetup{chapter:before}, ] \setupexternalfigure[location=default] \starttext \startchapter [title={foo}] \dorecurse{2}{\input tufte \par} \stopchapter \startchapter [title={foo2}] \dorecurse{6}{\input tufte \par} \stopchapter \startchapter [title={bar}] \input knuth \startTEXpage \externalfigure[cow.pdf][height=\paperheight,width=\paperwidth] \stopTEXpage \stopchapter \startchapter [title={baz}] \input knuth \stopchapter \stoptext %% stop mwe As you see the image is not in the right place and of course the pagenumbering is wrong. I want that one of these blue pages shows an image. Is this possible? Thanks for your help. juh -- Autoren-Homepage: ......... http://literatur.hasecke.com Satiren & Essays: ......... http://www.sudelbuch.de Privater Blog: ............ http://www.hasecke.eu Netzliteratur-Projekt: .... http://www.generationenprojekt.de

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Re: [NTG-context] referencing both real and user pagenumbers
by Wolfgang Schuster 29 May '20

29 May '20

Alan Bowen schrieb am 29.05.2020 um 16:53: > Thank you, Wolfgang. That works nicely. > > One small detail left: the reference is not interactive. > > I have tried \setupreferencing [state=start, interaction=all] but that > does not seem to be the way. > > minimal file: > \setupinteraction[state=start] > \starttext > \chapter[title=My first, > reference=First] > \page > in chapter 1 on page \getreference[realpage][First] > \stoptext Create a new reference command with \definereferenceformat [getrealpage] [type=realpage] and use it (e.g. \getrealpage[First]) to show the page number. Wolfgang

1 0

referencing both real and user pagenumbers
by Alan Bowen 29 May '20

29 May '20

I have a collection of papers printed previously that are to go into a single volume so that, while the papers retain their original pagination and internal cross-referencing, they are also paginated continuously. I have managed to do this using userpagenumbers for the individual papers and realpagenumbers for the volume as a whole. Re cross-referencing: \at and \in etc. return userpagenumbers (which I need). But I also need them (or something like them) to return realpagenumbers as well. Is there a way to do this? Alan

2 1

mtxrun exit code
by Hans van der Meer 29 May '20

29 May '20

I am producing a series of files in a shell script with mtxrun --autogenerate --script context input Doing exit mtxrun... shows there is no exit number to test in the shell, or to ste a shell variable to that value. I can set a global macro \ExitStatus to an exit value depending on success or failure, pass that on to mtxrun as exit statusd and test that in the script. For example: \starttext \xmlprocessbuffer{notes}{notes}{} \doif{\ExitStatus}{notok}{"let mtxrun return value 1 as error in UNIX"} \stoptext After that it would be possible in the shell script to delete the pdf produced, what is my intention in this case. Is this an option or is there presently another (standard) procedure to communicate from ConTeXt to the shell. dr. Hans van der Meer

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About the use of command handlers
by Jairo A. del Rio 29 May '20

29 May '20

Hello list! I was reading the following: https://wiki.contextgarden.net/Style_Alternatives I wanted to figure out how to make a simple module. However, there's a point in the example below which I don't understand % macros=mkvi \startmodule[look] \unprotect \writestatus{loading}{ConTeXt User Module / look} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \installnamespace {look} \installcommandhandler \????look {look} \????look \appendtoks \setuevalue{\currentlook}{\do_look{\currentlook}} \to \everydefinelook \unexpanded\def\do_look#id{% \edef\currentlook{#id}% \dosingleempty\do_do_look% } \def\do_do_look[#parms]#content{% \begingroup \iffirstargument\setupcurrentlook[#parms]\fi %This handles style and color \uselookstyleandcolor\c!style\c!color% #content% \endgroup% } \protect %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \stopmodule What have I to do if, instead of "color" or "style", I want to use another keyword, as "dummy" and get its value? Something like \definelook[lol][dummy = blabla] \lol{words} %e.g. words \emph{blabla} or something similar so "lol" is a word, a number or whatever. I've read something about command handlers, but I'm having a hard time trying to understand them. Thank you in advance!

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