Fix figure caption separator synthesis (#3621)

1 files changed, 9 insertions, 1 deletions

diff --git a/crates/typst/src/model/figure.rs b/crates/typst/src/model/figure.rs
index b5698fac..1f8c5759 100644
--- a/crates/typst/src/model/figure.rs
+++ b/crates/typst/src/model/figure.rs
@@ -437,7 +437,7 @@ impl Outlinable for Packed<FigureElem> {
 ///   caption: [A rectangle],
 /// )
 /// ```
-#[elem(name = "caption", Show)]
+#[elem(name = "caption", Synthesize, Show)]
 pub struct FigureCaption {
     /// The caption's position in the figure. Either `{top}` or `{bottom}`.
     ///
@@ -546,6 +546,14 @@ impl FigureCaption {
     }
 }
 
+impl Synthesize for Packed<FigureCaption> {
+    fn synthesize(&mut self, _: &mut Engine, styles: StyleChain) -> SourceResult<()> {
+        let elem = self.as_mut();
+        elem.push_separator(Smart::Custom(elem.get_separator(styles)));
+        Ok(())
+    }
+}
+
 impl Show for Packed<FigureCaption> {
     #[typst_macros::time(name = "figure.caption", span = self.span())]
     fn show(&self, engine: &mut Engine, styles: StyleChain) -> SourceResult<Content> {