How do I scale the rendered equation to match the surrounding text?

[OskarPersson]

Changing the font size doesn't affect the rendered equation:

import SwiftUI
import LaTeXSwiftUI

@main
struct iOSApp: App {
    var body: some Scene {
        WindowGroup {
            LaTeX("Solve the following: $(9-2)^2\\cdot9^2$")
            LaTeX("Solve the following: $(9-2)^2\\cdot9^2$").font(.system(size: 8))
        }
    }
}

[rrrpdx]

Did you have any luck with this? I was able to change the font size within latex by, for example, doing $\\Huge\\pi$ ... I tried $\\fontsize{30}{36}\\pi$, but that didnt' seem to work.

[colinc86]

The view needs to be able to measure/calculate the current font's x-height to correctly size the characters inside of the rendered LaTeX SVG. To do that, the view must use the UIFont/NSFont classes and do its best to convert SwiftUI's Font structure into the correct UIFont instance. Right now the only way I know how to do that is by limiting the functionality to SwiftUI's static largeTitle, title, title1, headline, etc fonts.

Long story short - if you use the statically declared fonts and not the .system(...) font initializers, then the rendered equation text should match.

I'm going to leave this issue open though because I think it's still worth investigating to come up with a better solution.

[m-yeroshenko]

Hi everyone!
Are there any updates on this matter?

[colinc86]

Been a while, but I've added some features that will be helpful in PR #64 - you can now set the font using either

• SwiftUI preferred fonts (largeTitle, body, etc) or
• UIFont/NSFont

So in the example you provided you can now do something like

LaTeX("Solve the following: $(9-2)^2\\cdot9^2$")
  .font(UIFont.systemFont(ofSize: 8))

and it should render the way you'd expect.

Unfortunately, this is the best we can do until SwiftUI exposes more attributes through some Font reader to glean x-height.

This will go out on the next release.

[AstroWLAN]

This feature isn’t supported on macOS yet, is it?

[colinc86]

@AstroWLAN it's not in main yet but in develop. I've been toying around with some other methods, but I think develop is the best it will get for now. I'll create a release tonight.