scribble: how to put a bar above text?

[Jos Koot]

 

Hi,

Using scribble when writing a text containing Boolean expressions it would be nice to write ‘not(A+B)’ as ‘A+B’ with a bar above it. An expression like not(not(A)+not(B)) would need bars above the A and the B as well above the whole. Is this possible? I have found no solution in the scribble docs. I have looked into some HTML tutorials too, but did not find what I want. I am an ignorant with respect to HTML. And even when I would know how to do it in HTML, I also would need to know how to transfer the tool to scribble.

Thanks, Jos

[Stephen De Gabrielle]

Hi Jos

MathML support via the <math> tag is not good. 

I suspect the best option is to use Mathjax https://www.mathjax.org/#gettingstarted

 

I think you use `head-extra`[1] to add the required script tags[2] to your file. (not done this myself though so I'm not sure how)

 

[1] https://docs.racket-lang.org/scribble/core.html#%28def._%28%28lib._scribble%2Fhtml-properties..rkt%29._head-extra%29%29

[2]

<script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script>
<script id="MathJax-script" async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"></script>

[Jos Koot]

Hi,

Thanks for your prompt reply.

I’ll first look into Mathjax. It’s on github, so I suppose I can download it without charges.

Using head-extra seems straight forward, but I never used it before. I’ll see what happens.

I hope it works with the scribble HTML button in DrRacket, for it seems I do not have the required software to use the scribble PDF button. (I tried to download the required software, but it did not work. May be windows 10 poses a problem (well, it always does). It would be nice to have Unix as a subsystem within windows, but I don’t know whether or not that is possible.)

Thanks again, Jos

[Kieron Hardy]

FYI: As of Windows 10, you can install a full Linux distro in/on Windows. Here are the instructions:

https://docs.microsoft.com/en-us/windows/wsl/install-win10

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[Ryan Kramer]

Something things in scribble have a `#:style` argument. And most things in scribble can be contained inside a `nested` or `elem`, to which you could apply your custom #:style. You can use this as a hook to a custom CSS file, where you could maybe use "text-decoration: overline;" if that looks good to you. (Although if you anticipate needing more math typesetting capabilities, HTML+CSS will probably fail you. Mathjax sounds good.)

Basically, if you can hand-write HTML that looks good to you, you can probably get Scribble to do what you want. The relevant reading, I believe, is "styles" and `make-css-addition`, starting here: https://docs.racket-lang.org/scribble/config.html

Or, if you want to see a real example, I just did one: https://docs.racket-lang.org/plisqin/Refactoring_Recipes.html This uses a custom "PGreen" CSS class. You might be able to see how it all gets wired up by looking at these files: https://github.com/default-kramer/plisqin/search?q=PGreen&unscoped_q=PGreen

Hope this helps! But there no way to explain this with a little 10-line example, unfortunately.

[Ryan Kramer]

Oh my gosh, I almost forgot about Unicode tricks! (I wish I knew more about Unicode). Here is a macron: ā. And it seems there's a lot more you can do: https://qualityandinnovation.com/2014/11/22/typing-x-bar-y-bar-p-hat-q-hat-and-all-that/

These will work just fine inside a Racket source file.

On Tuesday, June 16, 2020 at 7:41:08 AM UTC-5, jos.koot wrote:

[Jos Koot]

 

Thanks to all of you for your help.

I have tried some of your suggestions.

They are promising.

Meanwhile I have found out that I can do the following:

• Create an equation in Word
• Save it as a picture
• Convert it to gif
• Insert it with @image

Nevertheless I’ll look further into your suggestions.

Thanks, Jos