Is there a way to obtain the current math size?

Questions
,
1

I am trying to write a function which among other things should turn content which is

  • display/inline sized to script size and
  • script sized to sscript size.
    (Similar how subscript etc. behave.)

My own attempt was something like:

#let returnsizestyle = context {
  measure($M$).width
  // comparison to measure($script(M)$).width
}

$ display(returnsizestyle) inline(returnsizestyle) script(returnsizestyle) sscript(returnsizestyle) $

Do you have some idea on how to achieve this?

2

I do not believe this is possible at the moment

3

I think the key issue here is that any of those functions aren’t elements and therefore can’t be handled separately via #show func-name. I made an example that shows current size of an element:

#set text(12pt)
#context text.size

#show heading: set text(13pt)
#show heading: it => it + repr(text.size)

#show raw: set text(14pt)
#show raw: it => it + " " + repr(text.size)

#show math.equation: set text(15pt)
#show math.equation: it => it + " " + repr(text.size)

#show "x": it => it + " (" + repr(text.size) + ")"

x

---

= x

---

`x`

---

$x$

image

I also played a bit with the equation functions:

#context measure($display(x)$).width

#context measure($inline(x)$).width

#context measure($script(x)$).width

#context measure($sscript(x)$).width

#let s = 11pt
#context measure(text(s, $x$)).width
#text(s, $x$)
#(s.pt() / 6.29)

#let s = 8.72pt
#context measure(text(s, $x$)).width
#text(s, $x$)
#(s.pt() / 4.99)

#let s = 7.62pt
#context measure(text(s, $x$)).width
#text(s, $x$)
#(s.pt() / 4.36)

#show math.equation: it => repr(it.body)

$display(x)
 inline(x)
 script(x)
 sscript(x)
$

image

I think if they were to be elements, then it could be done something like this:

#show math.display: set text(8.72pt)
#show math.inline: set text(8.72pt)
#show math.script: set text(7.62pt)

Since you can’t get directly the text.size for any element (I don’t think so) like heading.text.size, this means you can’t do:

#show math.display: it => text(math.script.text.size, it)
#show math.inline: it => text(math.script.text.size, it)
#show math.script: it => text(math.sscript.text.size, it)