October 2023 - ntg-context - NTG Mailing Lists

Testing whether an XML attribute exists
by Michael Guravage 17 Oct '23

17 Oct '23

Hi, I am typesetting a very simple address list whose source is written in XML. Typesetting choices need to be made dependent on the presence of various attributes; consider the following <family> element. <family surname="Boer" prefix="den"> If the prefix attribute exists I'l like the name to appear as, e.g. 'Boer, den." The several XML attribute testing functions in the XML manual appear to discriminate on an attribute's value. I tried \xmldoifnotatt in an attempt to say, "TRUE if prefix does not match an empty string", since I am not interested in the attribute's value but only whether or not it exists. The code below doesn't work. If someone who knows why it doesn't work would enlighten my ignorance I would be most grateful. A brief explanation and example of \xmldoifatt, \xmldoifnotatt, and \xmldoifelseatt would be exceedingly helpful. \startxmlsetups xml:list:family {\bf \xmlatt{#1}{surname} \xmldoifnotatt{#1, prefix, ''} {, \xmlatt{#1}{prefix}}} \crlf \xmlflush{#1} \stopxmlsetups I have attached three files below: an XML address list, the ConTeXt source file and the typeset result. -- With kind regards, Michael Guravage

3 2

regular online meetup
by Henning Hraban Ramm 15 Oct '23

15 Oct '23

You’re invited to join on Wednesday, October 11th, 19:00 CEST (UTC+2) (4 hours later than before!) at https://lecture.senfcall.de/hen-rbr-rku-oke ConTeXt users of all levels are welcome! For the upcoming meetups feel free to suggest times that suit you better. Next scheduled is November 8th. Hraban

3 4

colors for links
by Pablo Rodriguez 14 Oct '23

14 Oct '23

Hi Hans, I have the following source, which tries to resemble three kinds of links: \setupinteraction[state=start, style=, focus=standard] \def\inone#1{% \start\setupinteraction[color=darkgreen]% \enabledirectives[references.border=darkgreen]% \goto{#1}[url(#1)]\stop} \def\intwo#1{% \start\setupinteraction[color=darkred]% \enabledirectives[references.border=darkred]% \goto{#1}[url(#1)]\stop} \def\inthree#1{% \start\setupinteraction[color=darkblue]% \enabledirectives[references.border=darkblue]% \goto{#1}[url(#1)]\stop} \starttext \startTEXpage[offset=1dk, align=middle] \inone{one}\blank \intwo{two}\blank \inthree{three}\blank \stopTEXpage \chapter[one]{First chapter} \chapter[two]{Second chapter} \chapter[three]{Second chapter} \stoptext I see that the directive for link borders only allows one color for links per document. In my real-world documents, I need to make three different border links: for destinations inside the document (/GoTo), for destinations in other documents (/GoToR or /GoToE) and for external destinations (/URI). With the current document I write now, I have over a hundred links in twenty pages. Being able to visually distinguish each link helps interaction with the document (reading or even writing it). Would it be possible that \setupinteraction could have a bordercolor key, such as the color one? Many thanks for your help, Pablo

2 3

Gray gradient with Metapost
by Fabrice Couvreur 07 Oct '23

07 Oct '23

Hi, I would like to obtain, if possible, a gray gradient like in the image. My code uses Metapost but maybe this is possible with Metafun. Thanks. Fabrice \starttext \startMPcode u=1.2cm; interim ahangle := 30; z0=(0,0); z1=(3u,0); z2=(3u,4u); z3=(0,4u); z4=(0.8u,4u); z5=(2.2u,4u); path rectangle; rectangle=z0--z1--z2--z3--cycle; picture X; X = image( drawoptions(withpen pencircle scaled 1.25 withcolor \MPcolor{orange}); draw (left--right) scaled 2; draw (down--up) scaled 2; drawoptions(); ); fill z0--z4--z3--cycle withcolor .5[red,green]; fill z1--z5--z2--cycle withcolor .5[red,green]; fill z0--z4--z5--z1--cycle withcolor 0.625white; draw z0--z4--z3--cycle; draw z1--z5--z2--cycle; draw rectangle; path a[]; a1 = subpath (0, 1) of rectangle shifted 10 down; a2 = subpath (3, 4) of rectangle shifted 10 left; a3 = subpath (2.26, 2.76) of rectangle shifted 13 up; drawdblarrow a1; label.bot("$30$", point 1/2 of a1); drawdblarrow a2; label.lft("$x+20$", point 1/2 of a2); drawdblarrow a3; label.top("$x$", point 1/2 of a3); draw X shifted z0; draw X shifted z1; draw X shifted z2; draw X shifted z3; draw X shifted z4; draw X shifted z5; label.ulft("B",z3); label.urt("C",z2); label.lrt("D",z1); label.llft("A",z0); label.top("E",z4); label.top("F",z5); \stopMPcode \stoptext

3 5

How can I use a variable for a MetaPost coordinate ?
by peter.hopcroft＠icloud.com 05 Oct '23

05 Oct '23

Hello list, I want to draw lines on a page. I want to pass my line coordinates as a percent of \width or \textheight, rather than as millimetres. So that if I change the page size I don't need to change the coordinates. The MWE below compiles but the pdf does not have any lines drawn on it. Is there a way of doing calculations on the coordinates for the draw using ConTexT variables like \textheight? Thank you, Peter Hopcroft ------ \starttext Some text \startMPcode pickup pensquare scaled 1pt; draw (0mm,0mm)--(0mm,\textheight) withcolor red \stopMPcode More text \startMPcode pickup pensquare scaled 1pt; draw (0mm,0mm)--(0mm,50mm) scaled \numexpr\textheight/50mm\relax \stopMPcode \stoptext ------

2 2

Attempting to Generate PDF/A in LMTX
by Jin-Ho King 05 Oct '23

05 Oct '23

Following the instructions on https://wiki.contextgarden.net/PDF/A, I am receiving errors that the *.icc files cannot be located. I have saved the *.icc files in ~/context-osx-arm64/tex/texmf-context/colors/icc/profiles per the instructions. Here's an excerpt from the log: backend > profiles > profile specification 'default_cmyk.icc' loaded from '/Users/jinho/context-osx-arm64/tex/texmf-context/colors/icc/context/colorprofiles.xml' backend > profiles > error, couldn't locate profile 'default_cmyk.icc' backend > profiles > no default profile 'default_cmyk.icc' for colorspace 'cmyk' backend > profiles > profile specification 'default_rgb.icc' loaded from '/Users/jinho/context-osx-arm64/tex/texmf-context/colors/icc/context/colorprofiles.xml' backend > profiles > error, couldn't locate profile 'default_rgb.icc' backend > profiles > no default profile 'default_rgb.icc' for colorspace 'rgb' backend > profiles > profile specification 'default_gray.icc' loaded from '/Users/jinho/context-osx-arm64/tex/texmf-context/colors/icc/context/colorprofiles.xml' backend > profiles > error, couldn't locate profile 'default_gray.icc' backend > profiles > no default profile 'default_gray.icc' for colorspace 'gray' backend > profiles > profile specification 'ISO coated v2 300% (ECI)' loaded from '/Users/jinho/context-osx-arm64/tex/texmf-context/colors/icc/context/colorprofiles.xml' backend > profiles > error, couldn't locate profile 'ISOcoated_v2_300_eci.icc' backend > profiles > invalid output intent 'ISO Coated v2 300% (ECI)' Here is a MWE that generates these errors: setupinteraction [title=TITLE, subtitle=SUBTITLE, author=AUTHOR, keyword={{KEYWORD1, KEYWORD2}, KEYWORD3}] %% For PDF/A \setupbackend[ format={pdf/a-1b:2005}, % or pdf/a-1a:2005 profile={default_cmyk.icc,default_rgb.icc,default_gray.icc}, intent=ISO coated v2 300\letterpercent\space (ECI)] %% Tagged PDF %% method=auto ==> default tags by Adobe \setupbackend[export=yes] \setupstructure[state=start,method=auto] \starttext \chapter[chap:testing]{Testing} \input knuth \input tufte \input knuth \input tufte \input knuth \input tufte \stoptext What seems to be going wrong? Is the software looking for the *.icc profiles in a different place? Thank you! ~ Jin-Ho. -- "Ad astra per alas porci."

3 3

workaround for wrapping SHA512
by Pablo Rodriguez 05 Oct '23

05 Oct '23

Dear list, I have just added another workaround to long hashes (such as SHA512). It interleaves colons every two chars: https://wiki.contextgarden.net/Wrapping#Another_workaround_interleaving_col…. This makes a longer output, but it is more readable too. Just in case it helps anyone (who previously discussed this in this mailing list), Pablo

1 0

Re: [NTG-context] checkbox in fields show the word yes
by Andres Conrado Montoya 05 Oct '23

05 Oct '23

Firefox doesn't show the "yes", nor Acrobat X, but SumatraPDF does. I modified your definition as: \definefield[test][check][cbox][][] And now the "yes" doesn't appear. However, I don't know how this affects the functionality of the form. -- Andrés Conrado Montoya Andi Kú andresconrado(a)gmail.com http://sesentaycuatro.com http://messier87.com http://chiquitico.org ---------------------------------------- Los fines no justifican los medios, porque la medida verdadera de nuestro carácter está dada por los medios que estamos dispuestos a utilizar, no por los fines que proclamamos. ---------------------------------------- “You develop an instant global consciousness, a people orientation, an intense dissatisfaction with the state of the world, and a compulsion to do something about it. From out there on the moon, international politics look so petty. You want to grab a politician by the scruff of the neck and drag him a quarter of a million miles out and say, ‘Look at that, you son of a bitch.’” — Apollo 14 astronaut Edgar Mitchell

3 2

Re: bibliography questions
by Rik Kabel 05 Oct '23

05 Oct '23

1 1

Problems with line numbered program listings
by Bruce Horrocks 04 Oct '23

04 Oct '23

I'm trying to typeset some program listings with annotations alongside. I've tried both columns and tabulate but both have (different) issues: 1) Plain \typefile won't allow the line numbers to be in the text - they stay in the margin whch I don't want. 2) \typefile using a \definedtyping name does work and works in \columns as well. This is great until my listing is too long to fit on a page and then I'd rather have the column continue onto the next page but \columns balances of course. 3) \tabulate allows a single cell to continue down over the page exactly as I'd like, but the line numbers disappear altogether. (And it has to be a single cell because the program listings are in source files that I want to include using \typefile rather than re-enter to avoid typos.) You can see each of these effects with the following MWE which first needs a file called "three_lines.txt" to be created in the local directory containing the lines: one two three %%%% begin \setuplinenumbering[location=text,style=\small\tt] \starttext Location=text not working in main body \typefile[numbering=line]{three_lines.txt} But it does work if a custom typing environment is created. \definetyping[MyTyping][style=\tt] \typefile[MyTyping][numbering=line]{three_lines.txt} Still works if used in a column \startcolumns \typefile[MyTyping][numbering=line]{three_lines.txt} \column :-) \stopcolumns \blank But doesn't work if used in tabulate \starttabulate[|p|p|] \NC \typefile[MyTyping][numbering=line]{three_lines.txt} \NC No line numbers at all :-( \NR \stoptabulate \stoptext %%%% end What I'd most like is for tabulate to allow \typefile with line numbers if at all possible. — Bruce Horrocks Hampshire, UK

1 0