CODEWITHSUNDEEP
symbolsmathjax
user1700933
user1700933

Reputation: 197

MathJax overarrow too short

I am trying to place an overarrow over a piece of text in MathJax. I am using a custom font that I declare in the code- \(\overrightarrow{\style{font-family: mysans, TeX, Arial, sans-serif;}{\text{" + tString + "}}}\)"

It works ok for most letters- for capital W or M , using a couple in a row like "WWW" the overbar is too short. For lowercase i , using a couple in a row, ie "iii" it is too long. My hunch is that MathJax is using a standard character width size to figure out the length of the overarrow and when the character is much longer or shorter than that size, it calculates the overarrow incorrectly. Is there any way around this? Thanks!

Upvotes: 0

Views: 403

Answers (1)

Peter Krautzberger
Peter Krautzberger

Reputation: 5285

First off, you generally cannot use custom fonts with MathJax. As the documentation says

Since browsers do not provide APIs to access font metrics, MathJax has to ship with the necessary font data; this font data is generated during development and cannot be generated on the fly. In addition, most fonts do not cover the relevant characters for mathematical layout. Finally, some fonts (e.g. Cambria Math) store important glyphs outside the Unicode range, making them inaccessible to JavaScript.

However, if you are only looking to use custom fonts in text elements, then there is a way to work around this: style the surrounding context and set mtextFontInherit:true for the output jax, cf. e.g. here for HTML-CSS.

Unfortunately, this won't actually help you right now. There's a minor regression in MathJax 2.5 (see this discussion leading to the result you describe). This will be fixed in 2.5.1 and in the mean time you could set noReflows:false for the HTML-CSS output.

Upvotes: 1

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