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Script-style is not applied to numbers consistently in math #6318

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#6320
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Script-style is not applied to numbers consistently in math#6318
#6320
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bugSomething isn't workingmathRelated to math category, with its syntax, layout, etc.
@mkorje

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@mkorje
mkorje
opened on May 22, 2025

Description

When laying out numbers in math we currently only apply the ssty feature tag if it is a single number. The relevant code is here:

typst/crates/typst-layout/src/math/text.rs

Lines 68 to 80 in df89a0e

let is_single = text.chars().count() == 1;
for unstyled_c in text.chars() {
let c = styled_char(styles, unstyled_c, false);
let mut glyph = GlyphFragment::new(ctx, styles, c, span);
if is_single {
// Duplicate what `layout_glyph` does exactly even if it's
// probably incorrect here.
match EquationElem::size_in(styles) {
MathSize::Script => glyph.make_script_size(ctx),
MathSize::ScriptScript => glyph.make_script_script_size(ctx),
_ => {}
}
}

I think it makes sense to apply to all numbers. $script(1)$ and $script(11)$ should not produce different results IMO (which is what happens currently).

cc @wrzian

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  • I am using the latest version of Typst

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