Use list spacing for attach spacing in tight lists (#6242)

crates/typst-library/src/model/enum.rs

@@ -259,10 +259,11 @@ impl Show for Packed<EnumElem> {
                 .spanned(self.span());
 
         if tight {
-            let leading = ParElem::leading_in(styles);
-            let spacing =
-                VElem::new(leading.into()).with_weak(true).with_attach(true).pack();
-            realized = spacing + realized;
+            let spacing = self
+                .spacing(styles)
+                .unwrap_or_else(|| ParElem::leading_in(styles).into());
+            let v = VElem::new(spacing.into()).with_weak(true).with_attach(true).pack();
+            realized = v + realized;
         }
 
         Ok(realized)

crates/typst-library/src/model/list.rs

@@ -166,10 +166,11 @@ impl Show for Packed<ListElem> {
                 .spanned(self.span());
 
         if tight {
-            let leading = ParElem::leading_in(styles);
-            let spacing =
-                VElem::new(leading.into()).with_weak(true).with_attach(true).pack();
-            realized = spacing + realized;
+            let spacing = self
+                .spacing(styles)
+                .unwrap_or_else(|| ParElem::leading_in(styles).into());
+            let v = VElem::new(spacing.into()).with_weak(true).with_attach(true).pack();
+            realized = v + realized;
         }
 
         Ok(realized)

crates/typst-library/src/model/terms.rs

@@ -189,13 +189,15 @@ impl Show for Packed<TermsElem> {
             .styled(TermsElem::set_within(true));
 
         if tight {
-            let leading = ParElem::leading_in(styles);
-            let spacing = VElem::new(leading.into())
+            let spacing = self
+                .spacing(styles)
+                .unwrap_or_else(|| ParElem::leading_in(styles).into());
+            let v = VElem::new(spacing.into())
                 .with_weak(true)
                 .with_attach(true)
                 .pack()
                 .spanned(span);
-            realized = spacing + realized;
+            realized = v + realized;
         }
 
         Ok(realized)

tests/suite/model/list.typ

@@ -304,3 +304,11 @@ World
   - C
 - = D
   E
+
+--- issue-6242-tight-list-attach-spacing ---
+// Nested tight lists should be uniformly spaced when list spacing is set.
+#set list(spacing: 1.2em)
+- A
+  - B
+  - C
+- C