May 2025 - ntg-context - Mailing Lists

Images and Accessibility (ConTeXt LMTX 2025.04.28)
by Matthias Weber 11 May '25

11 May '25

Dear All, I am starting a new thread as requested. I can confirm that > > the following should work with current latest (from yesterday, > LuaMetaTeX 2.11.07 20250427 + ConTeXt LMTX 2025.04.28 14:29): > > \enabledirectives [backend.usetags=testing] > \setuptagging[state=start] > \setupstructure[state=start] > \setupbackend > [format=PDF/A-3a] > \setupbackend[format=pdf/ua-1] > \setupexternalfigures[location=default] > \starttext > \externalfigure[hacker][label={this is an image}] > > \startparagraph > a > \stopparagraph > \stoptext produces a PDF that passes the accessibility check in the current Adobe Acrobat. In particular, it passes the alternate text checks. Hovering over the image shows the alternate text in Acrobat. However, VoiceOver (on the Mac) does not read the alternate text; it completely ignores the existence of the image. In Preview, no alternate text is shown or read. So it seems that the only benefit is that readers with vision can see an alternate text... I don’t have access to a Windows machine, so I cannot test what other screen readers can do with this document. Thanks, Matthias

6 11

Shadow around a figure
by Jeroen 11 May '25

11 May '25

Is there a way with metapost to get a slightly off-centered (upper-right) shadow around a figure?

3 4

Error with xml files and attribute lists
by Wolfgang Schuster 11 May '25

11 May '25

Hi, the xml parser fails on attribute list settings in xml files. %%%% begin example \startbuffer[jmdict] <!DOCTYPE JMdict [ <!ATTLIST lsource xml:lang CDATA "eng"> ]> <JMdict> </JMdict> \stopbuffer \starttext \startluacode local jmdict = lxml.loadbuffer("","jmdict",false) inspect(jmdict) \stopluacode \stoptext %%%% end example Wolfgang

1 0

comparing text with the new typo-dif.mkxl
by Pablo Rodriguez 11 May '25

11 May '25

Hi Hans, from typo-dif.mkxl, lines 16-17: > % Currently only a color can be set but I might add support for underline > % and simple background. Would it be possible to have simple (color) background implemented? After comparing texts, I realize that when few chars differ (or even only one), it is harder to notice. Colored background (with even white foreground color) is far easier to notice. Many thanks for your help, Pablo

2 2

Change Figure Capture
by Jeroen 10 May '25

10 May '25

Is there an easy way to change the capture below all figure captures to italic? Many thanks, Jeroen

2 3

List of abbreviations
by Jeroen 10 May '25

10 May '25

At the beginning of a report I would like to have a page with an abbreviation listing with for example HTML hypertext mark-up language CSS cascade style sheets etc The distancing where the long explanation starts should be the same at lets say 30mm from the margin and in case it jumps to a next line, it also should continue at 30mm from the margin and not back at the margin. What would be the best way to achieve this? Thanks Jeroen

3 4

\ifnum with two \recurselevel
by Pablo Rodriguez 09 May '25

09 May '25

Dear list, I have the following sample code: \starttext \startTEXpage[offset=1dk] \dostepwiserecurse{2}{6}{1}{\edef\AbC{\recurselevel}% \dostepwiserecurse{2}{7}{1}{%\AbC.\recurselevel\ /\ \ifnum\AbC < \recurselevel% \AbC:\recurselevel\ \|\| \fi} \\} \stopTEXpage \stoptext I would like to only get the numbers in the form first:second loops if and only if the value of the first loop is less than the value from the second loop. I think this should be simple, but I don’t get it with any of these conditionals: \ifnum\AbC < \recurselevel \ifnum\recurselevel > \AbC Sorry for the stupid question, but what I am missing here? Many thanks for your help, Pablo

3 4

modernizing
by Hans Hagen 08 May '25

08 May '25

Hi, At last week bachotex we (Tove, Mikael, Willi, Hans) cinducted the first in a series of experiments and presentations dealing with accessibility. After all, why bother more about pdf than of the tool that makes it. - we tested if qr codes were easier on users than tex error messages (experiment conducted with high end wooden ear-tags with qr codes made by Willi, who else) because after all humans are good in pattern recognition - we (read: Tove, well known from the "ts" unit) tested to what extend colors could be recognized (after all in Sweden PDF documents have to obey very strict rules wrt color); we will report later on this promissing "flagged pdf" (with color light bulbs triggered by pdf) experiment in an article - as side track (okay: logical follow up) we checked how users react on more vivid visual feedback (this is already supported but the manual was on purpose not yet added to the distribution); we will follow up on this at the context meeting You can do part of this experiment by adding this to the top of your file: % signal=qr (There's also a command line option plus a related script. The next upload will have the preliminary "signals.pdf" manual, just in case you have the needed equipment.) In that case an error will pop up a qr code. The idea is that after while you (or your mobile phone) will recognize these messages easier than parsing a log. It also fits more in todays paradigms. We might eplore easy installations with qr codes because after all that's how things are done these days. So, thanks to Tove, we ended up in modern times. Stay tuned, 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 -----------------------------------------------------------------

2 1

curl missing from Docker image -> install-modules does not work
by Marco Riggirello 08 May '25

08 May '25

Hello, installing modules into the docker image is not possible since the curl command is not part of the image. If I run $ docker run --rm --entrypoint "" contextgarden/context:lmtx /bin/sh -c "cd /context/tex/ && mtxrun --script install-module --install filter" I get (see line 4) mtx-install-modules | loading entries from file '/context/tex/texmf-context/tex/context/modules/third/mtx-install-imp-modules.lua' mtx-install-modules | loading entries from file '/context/tex/texmf-context/tex/context/modules/third/mtx-install-imp-tikz.lua' mtx-install-modules | sh: 1: curl: not found mtx-install-modules | unknown 'https://modules.contextgarden.net/dl/t-filter.zip' mtx-install-modules | mtx-install-modules | renewing file database mtx-install-modules | system | lua | compiling '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/71c82419867f9a0df8a150196c03c86f.lua' into '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/71c82419867f9a0df8a150196c03c86f.lud' system | lua | dumping '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/71c82419867f9a0df8a150196c03c86f.lua' into '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/71c82419867f9a0df8a150196c03c86f.lud' stripped system | lua | compiling '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/3f406286dc3075cdfb044f836920f46a.lua' into '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/3f406286dc3075cdfb044f836920f46a.lud' system | lua | dumping '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/3f406286dc3075cdfb044f836920f46a.lua' into '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/3f406286dc3075cdfb044f836920f46a.lud' stripped system | lua | compiling '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/73630a261795d9c53610a28af4550cbc.lua' into '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/73630a261795d9c53610a28af4550cbc.lud' system | lua | dumping '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/73630a261795d9c53610a28af4550cbc.lua' into '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/73630a261795d9c53610a28af4550cbc.lud' stripped system | lua | compiling '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/3952aa25b6a1b9f9f8d3eeb6e65f0039.lua' into '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/3952aa25b6a1b9f9f8d3eeb6e65f0039.lud' system | lua | dumping '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/3952aa25b6a1b9f9f8d3eeb6e65f0039.lua' into '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/3952aa25b6a1b9f9f8d3eeb6e65f0039.lud' stripped system | lua | compiling '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/fb39a92c95ceca857c3f2d0ee48a2ad3.lua' into '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/fb39a92c95ceca857c3f2d0ee48a2ad3.lud' system | lua | dumping '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/fb39a92c95ceca857c3f2d0ee48a2ad3.lua' into '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/fb39a92c95ceca857c3f2d0ee48a2ad3.lud' stripped system | lua | compiling '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/3f6978edf9feb817ad6c1f21fc262031.lua' into '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/3f6978edf9feb817ad6c1f21fc262031.lud' system | lua | dumping '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/3f6978edf9feb817ad6c1f21fc262031.lua' into '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/3f6978edf9feb817ad6c1f21fc262031.lud' stripped system | lua | compiling '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/dcb651482955ac31eaab7723b70e0184.lua' into '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/dcb651482955ac31eaab7723b70e0184.lud' system | lua | dumping '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/dcb651482955ac31eaab7723b70e0184.lua' into '/context/tex/texmf-cache/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/trees/dcb651482955ac31eaab7723b70e0184.lud' stripped mtx-install-modules | mtx-install-modules | installed: filter mtx-install-modules | This affects also installations outside docker if the user has a system without curl the mtxrun script end without throwing a very evident error. I hope it helps. Thanks to all the contributors for the their work. Best regards MR

3 3

Spaces around vertical and horizontal lines inside matrix
by Андрей 07 May '25

07 May '25

2 1