August 2019 - ntg-context - NTG Mailing Lists

XML/HTML output of Math
by Atsuhito Kohda 09 Aug '19

09 Aug '19

Hi all, I used to compile a beamer file with LuaLaTeX to generate a PDF for presentation then convert the beamer file to XHTML with LaTeXML for Web page. Recently I begin to use ConTeXt so I try to get a PDF for presentation and also XML/HTML output from a single ConTeXt file. I have a few questions about XML/HTML output of Math. 1. In case inline math mode with \displaystyle, we get wrong output of "\int_a^b"; lower limit and upper limit are interchanged and further "b" is a bit larger and an integral symbol is rather small. (It looks "\displaystyle" is not effective, e.g see "\frac".) In case display math mode, we get very weird output of "\int_a^b". It is difficult to explain how weird it is but something like an output of "b_{\int}^a". Please check an attatched sample. We get the similar kind of weird output of "\sum_{n=0}^{\infty}". Due to these, it is impossible to use XML/HTML output of ConTeXt in real use. 2. \math{\Vmatrix{\vI, \vj, \vk; a_{1}, a_{2}, a_{3}; b_{1}, b_{2}, b_{3}}} \vI, \vj, \vk are disappeared in xml/html output. What happend? BTW, if we put "a" (or any alphabet?) in fron of \vI, then we get every elements (but of course we get unnecessary "a" also). ------------- bSample \setupbackend[export=yes] \definemathmatrix[vmatrix][matrix:bars] [simplecommand=Vmatrix] \define[1]\vsym{\text{\math{\bi #1}}} \define\vI{\vsym{i}} % \define\vi{\vsym{i}} \define\vj{\vsym{j}} \define\vk{\vsym{k}} \starttext A simple math. \m{y=\sin x}, \m{\displaystyle y=\frac{\log x}{x}}, \m{\mathbf{A+B=C}}, \m{\mathbb{R}}, \m{\mathfrak{A}}, \m{\mathcal{S}}, A bit complex math. \m{\displaystyle\int_{a}^{b}x\sin x\,dx=-[x\cos x]_{a}^{b}+\int_{a}^{b}\cos x\,dx} \startformula \int_{a}^{b}x\sin x\,dx=-[x\cos x]_{a}^{b}+\int_{a}^{b}\cos x\,dx \stopformula \m{\displaystyle\sum_{n=0}^{\infty}\frac{x^n}{n!}} \startformula \sum_{n=0}^{\infty}\frac{x^n}{n!} \stopformula \math{\Vmatrix{\vI, \vj, \vk; a_{1}, a_{2}, a_{3}; b_{1}, b_{2}, b_{3}}} \math{\Vmatrix{a\vI, \vj, \vk; a_{1}, a_{2}, a_{3}; b_{1}, b_{2}, b_{3}}} \stoptext ------------- eSample Thanks in advance. Best regards, Atsuhito Kohda

3 5

align figures verticaly centered in \startcombination mode
by Jeong Dal 08 Aug '19

08 Aug '19

Dear all, In the following example, “align=middle” works for horizontal center. Is there any way to align two figures with different height in vertically centered? Thank you. Best regards, Dalyoung \useMPlibrary[dum] \setupinteraction[state=start] \usemodule[pre-60] \setupcombination[align=middle] \starttext \StartSteps \startplacefigure[] {\startcombination[2*2] {{\externalfigure[bogus][width=.3\makeupwidth]}{}\FlushStep} {{\externalfigure[bogus][height=.1\makeupheight]}{}\FlushStep} {{\externalfigure[bogus][width=.3\makeupwidth]}{}\FlushStep} {{\externalfigure[bogus][width=.3\makeupwidth]}{}\FlushStep} \stopcombination} \stopplacefigure \StopSteps \stoptext

2 1

Question to a table
by Ursula Hermann 07 Aug '19

07 Aug '19

Hello list! I have: \starttext \setupcombination [location=top, distance=\spaceamount] \bTABLE[align=flushleft,columndistance=0.1em] \bTR \bTD[width=2cm] Small \eTD \bTD[width=0.05\textwidth] \eTD \eTR \eTABLE \stoptext I have a question tot he sencond bTD [with 0.05\textwidth] \eTD, because: I would like to know: how can I put two different colors in this second bTD, should I do this like an overlay? There is not any text there. So that i have as an example to the list, pink and mystirose together, in one peace of the table without any text. Many thanks to the list Uschi

2 1

Bug in LMTX: Color is lost after linebreak
by Henri Menke 07 Aug '19

07 Aug '19

Dear devs, there seems to be a bug in LMTX. In the MWE below, the letter right after the linebreak is black instead of gray. I'm using the latest beta. mtx-context | main context file: /opt/context-lmtx/tex/texmf-context/tex/context/base/mkiv/context.mkiv mtx-context | current version: 2019.07.24 11:31 mtx-context | main context file: /opt/context-lmtx/tex/texmf-context/tex/context/base/mkiv/context.mkxl mtx-context | current version: 2019.08.02 19:50 Cheers, Henri --- \starttext \startstandardmakeup[align=middle] \tfd\setupinterlinespace \color[middlegray]{% Why is the letter right after the linebreak not gray?} \stopstandardmakeup \stoptext

2 1

Typesetting Markdown – Part 7: Mathematics
by Thangalin 07 Aug '19

07 Aug '19

https://dave.autonoma.ca/blog/2019/08/06/typesetting-markdown-part-7/ This installment tackles a cost-benefit analysis problem comparing electric to gasoline-powered vehicles, calls into R for amortization, typesets math and a repayment schedule, continues to explore the separation of content from presentation, and expands on the shell scripts from previous parts. Feedback is welcome, especially about the ConTeXt-related items (see Style and Math near the bottom). Thanks for reading!

1 0

Nested Column Layout
by Walter Mays 06 Aug '19

06 Aug '19

Hello all, I am trying to lay out a page that has a 2/3 column split, and then nest another set of 3 columns inside the larger of the two outer columns. In case that's not clear, I've attached a PNG that shows approximately what I would like to achieve. Here's what I've tried: ``` \defineparagraphs[TwoThirds][n=2] \setupparagraphs[TwoThirds][1][width=0.33\textwidth] \starttext \startTwoThirds \input tufte \nextTwoThirds \input tufte \startcolumns[n=3] \input tufte \stopcolumns \stopTwoThirds \stoptext ``` Instead of doing what I described, it made the contents of that inner column very narrow, but does not split it across columns. The \column command seems to have no effect. Thank you for your help, Walter

2 1

lmtx
by Hans Hagen 05 Aug '19

05 Aug '19

Hi, As we're progressing with the lmtx project (aka luametatex + context) the codebase gets adapted a bit. There are a few things that you need to keep an eye on: - As we test with lua 5.4 it can be that you need to wipe the cache after an update due to differences in byte code. This is only needed when you run into issues. At some point there might be a split in lua code (for luatex and luametatex) as 5.2 (luajittex, not evolving), 5.3 (luatex, stable frozen) and 5.4 (luametatex, experimental progressing) have a couple of different properties that we might want to benefit from. - The code base gets split in "Mark Four" and "Mark Fourty" files. Some of these are permanent, some can be temporary. It can for instance relate to features in and experiments with the engine. The only convenient way to test things is in 'real situations' and often issues can be solved fast. - As we're experimenting with metafun (and luagraph and ...) we also explore new interfaces. This results in a different codebase but should go unnoticed for existing code. Of course metafun 2.0 (hip and modern internet version speak) can bring interesting new things in the end. As usual, happy testing. 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 -----------------------------------------------------------------

1 0

Captions with background
by Henning Hraban Ramm 04 Aug '19

04 Aug '19

Hi, in my books I typeset captions onto full page images, therefore I need a background; in the attached example it’s just a white box, usually I use a MetaPost shadow (some of you helped me with that a few years ago, current code see https://wiki.contextgarden.net/Drop_shadows) Now, the background should just enclose the text, not more. Since I don’t know how long the caption will be (I use the whole setup in a macro), I need a \vbox within \setlayer, but that always uses the full \textwidth, regardless of width settings of \framed. If the caption is short, the box should be minimal. Is this possible? Even better would be a textbackground just behind the text lines. Unfortunately my MP foo is not up to the task, the rectangular shadow was hard enough, but I’d try. There’s an example in details.pdf, but I don’t understand how I could manipulate the path around the text (not: paragraph). The example shows another problem: If you run it with --mode=arrange, the bleed is cut off. Is this a matter of settings or a bug? Greetlings, Hraban

2 2

lmtx: img?
by Henning Hraban Ramm 03 Aug '19

03 Aug '19

Hi, when I try to compile my books with lmtx, it chokes on my Lua image library. Seems like "img" (esp. img.scan) is gone. Is there a replacement? Greetlings, Hraban --- https://www.fiee.net http://wiki.contextgarden.net https://www.dreiviertelhaus.de GPG Key ID 1C9B22FD

2 3

\setupheadertexts \setupfootertexts
by Alan Braslau 02 Aug '19

02 Aug '19

Hello, \setupheadertexts [{center}] sets a centered header (and wipes-out any left and right header) \setupheadertexts [{left}] [{right}] sets the left and right headers (and keeps the centered header) \setupheadertexts [{left odd}] [{right odd}] [{left even}] [{right even}] sets the left and right headers for even and odd pages (perhaps I have this backwards?) (1) It would be useful to have \setupheadertexts [{left}] [{center}] [{right}] but this does not work. In this case, we probably also need a *six* argument version (even/odd). (2) It would also be useful that \setupheadertexts [{center}] NOT wipe-out left and right if they are set (but I could live with this perhaps historical behavior if we were to have (1).) (3) It is a bit messy that one must use \setupheader [] \setupheader [left] [right] *two calls* in order to have no centered header. (Again, I could live with \setupheader [left] [] [right] if we were to have (1).) Similarly for footertexts, of course. What is the reasoning, presently? ALTERNATIVELY (or additionally), we could have \setupheadertexts [center={center}, left={left}, lefteven={left, even}, ...] which would be even cleaner. Thanks, Alan

3 8