Cancelled terms for MathML.

crates/typst-library/src/html/dom.rs

@@ -477,6 +477,7 @@ pub mod tag {
 
         tags! {
             math
+            menclose
             mfrac
             mi
             mmultiscripts

crates/typst-library/src/math/equation.rs

@@ -165,7 +165,7 @@ impl Synthesize for Packed<EquationElem> {
 }
 
 use crate::foundations::SequenceElem;
-use crate::math::{AccentElem, AttachElem, FracElem, LrElem, PrimesElem};
+use crate::math::{AccentElem, AttachElem, CancelElem, FracElem, LrElem, PrimesElem};
 use ecow::eco_format;
 fn bla(elem: &Content, engine: &mut Engine, styles: StyleChain) -> SourceResult<Content> {
     dbg!(elem);
@@ -187,6 +187,18 @@ fn bla(elem: &Content, engine: &mut Engine, styles: StyleChain) -> SourceResult<
         show_frac(elem, engine, styles)
     } else if let Some(elem) = elem.to_packed::<AttachElem>() {
         show_attach(elem, engine, styles)
+    } else if let Some(elem) = elem.to_packed::<CancelElem>() {
+        let notation = if elem.cross(styles) {
+            "updiagonalstrike downdiagonalstrike"
+        } else if elem.inverted(styles) {
+            "downdiagonalstrike"
+        } else {
+            "updiagonalstrike"
+        };
+        let tag = HtmlElem::new(tag::math::menclose)
+            .with_attr(HtmlAttr::constant("notation"), notation);
+        let body = elem.body.clone();
+        Ok(tag.with_body(Some(body)).pack().spanned(elem.span()))
     } else if let Some(elem) = elem.to_packed::<AccentElem>() {
         let accent = TextElem::packed(eco_format!(" {}", elem.accent.0));
         let accent = HtmlElem::new(tag::math::mo).with_body(Some(accent)).pack();