[CommonHTML] Anomaly caused by accented character inside \text{}

[cebola2]

I have come across an anomaly in MathJax for which I tried to furnish the proverbial minimal example but failed. I can nevertheless furnish a page without apparent problems, indicate the very slight change that will trigger the problem and screenshots of both.

The page is https://cdi2tp.math.tecnico.ulisboa.pt/praticas/3

To see the problematic area expand the last "Solução" by clicking the black triangle to its left. You will see something like this.

If one adds an acute accent to character a in the word contrario in the begin{cases}\end{cases} structure, then one gets what follows.

My attempts at replicating this in simpler circumstances have failed miserably so far.

[pkra]

Thanks for reporting this.

I see the problem in Chrome and Firefox; it only seems to affect the CommonHTML output. We'll look into it.

[dpvc]

MathJax doesn't know the bounding boxes for characters that are not in the MathJax fonts (like the accented letters), and so it must measure them in order to determine their size. But when an element is in a container with display:none (as contents of the <details> element effectively are), the browser doesn't lay out the content, and returns 0 for any measurement MathJax makes. This means MathJax gets the wrong size for those characters when they are typeset while they are not visible.

The HTML-CSS output jax moves the math to a non-hidden location in this case, but CommonHTML doesn't. Perhaps that should be done here as well.

[dpvc]

The issue1353 branch of my fork of MathJax includes a work-around.

[dpvc]

=> Merged

[dpvc]

=> In test suite

MathMLToDisplay/Characters/issue1353.html