Allow more complicated composition of characters in sub and superscript

[KennethNielsen]

Hi me here once again.

I have another request, but as before feel free to ignore it if it is out of scope. I post the issues because I would really like to use the tool to create in-code equations and it can almost do everything I want :smile:

As mentioned before, for scientific equations there can often be complicated both super and subscripts. As it is right now, the sub or super script seems to allow only sequences of letters or numbers and ends as soon as they are mixed or if a special character is added. This means e.g. that if I wanted to do what I in Latex would write as E_{2m} or I{_M'} the m and the ' disappears and breaks the equation. Would it be possible to add an apply-to-start-and-end like the {} in Latex, to make it possible to make these more elaborate sub and super scripts.

Regards Kenneth

[ArthurSonzogni]

I think I can do one of the 3 things:

• [x] Add support for grouping based on {}
• [x] Add support for strings (e.g. "2m" or "M'")
• [ ] Remove the first parenthesis for superscript and subscript. For instance:

When typing:

A_(1+2)

We currently get:

A       
 (1 + 2)

But you would like:

A       
 1 + 2

I am already doing this for division:

(1+2)/3

is giving:

1 + 2
─────
  3  

instead of

(1 + 2)
───────
   3   

[ArthurSonzogni]

Hi KennethNielsen, Could you please take a look? This adds support for arbitrary "unparsed strings".

I will make another patch adding support for braces "{" "}". They will have roughly the same behavior as parenthesis, but won't be never be shown.

[ArthurSonzogni]

I think I fixed this issue. Please let me know if there are still work to do here.

[KennethNielsen]

That works like a charm. Thanks so much. :fireworks: