Support show-set for outline and bibliography headings

library/src/meta/bibliography.rs

@@ -43,7 +43,7 @@ use crate::text::TextElem;
 ///
 /// Display: Bibliography
 /// Category: meta
-#[element(Locatable, Synthesize, Show, LocalName)]
+#[element(Locatable, Synthesize, Show, Finalize, LocalName)]
 pub struct BibliographyElem {
     /// Path to a Hayagriva `.yml` or BibLaTeX `.bib` file.
     #[required]
@@ -66,6 +66,11 @@ pub struct BibliographyElem {
     ///   language]($func/text.lang) will be used. This is the default.
     /// - When set to `{none}`, the bibliography will not have a title.
     /// - A custom title can be set by passing content.
+    ///
+    /// The bibliography's heading will not be numbered by default, but you can
+    /// force it to be with a show-set rule:
+    /// `{show bibliography: set heading(numbering: "1.")}`
+    /// ```
     #[default(Some(Smart::Auto))]
     pub title: Option<Smart<Content>>,
 
@@ -152,12 +157,7 @@ impl Show for BibliographyElem {
                     .spanned(self.span())
             });
 
-            seq.push(
+            seq.push(HeadingElem::new(title).with_level(NonZeroUsize::ONE).pack());
-                HeadingElem::new(title)
-                    .with_level(NonZeroUsize::ONE)
-                    .with_numbering(None)
-                    .pack(),
-            );
         }
 
         if !vt.introspector.init() {
@@ -199,6 +199,12 @@ impl Show for BibliographyElem {
     }
 }
 
+impl Finalize for BibliographyElem {
+    fn finalize(&self, realized: Content, _: StyleChain) -> Content {
+        realized.styled(HeadingElem::set_numbering(None))
+    }
+}
+
 impl LocalName for BibliographyElem {
     fn local_name(&self, lang: Lang) -> &'static str {
         match lang {

library/src/meta/outline.rs

@@ -47,7 +47,7 @@ use crate::text::{LinebreakElem, SpaceElem, TextElem};
 ///
 /// Display: Outline
 /// Category: meta
-#[element(Show, LocalName)]
+#[element(Show, Finalize, LocalName)]
 pub struct OutlineElem {
     /// The title of the outline.
     ///
@@ -55,6 +55,11 @@ pub struct OutlineElem {
     ///   [text language]($func/text.lang) will be used. This is the default.
     /// - When set to `{none}`, the outline will not have a title.
     /// - A custom title can be set by passing content.
+    ///
+    /// The outline's heading will not be numbered by default, but you can
+    /// force it to be with a show-set rule:
+    /// `{show outline: set heading(numbering: "1.")}`
+    /// ```
     #[default(Some(Smart::Auto))]
     pub title: Option<Smart<Content>>,
 
@@ -141,13 +146,7 @@ impl Show for OutlineElem {
                     .spanned(self.span())
             });
 
-            seq.push(
+            seq.push(HeadingElem::new(title).with_level(NonZeroUsize::ONE).pack());
-                HeadingElem::new(title)
-                    .with_level(NonZeroUsize::ONE)
-                    .with_numbering(None)
-                    .with_outlined(false)
-                    .pack(),
-            );
         }
 
         let indent = self.indent(styles);
@@ -247,6 +246,14 @@ impl Show for OutlineElem {
     }
 }
 
+impl Finalize for OutlineElem {
+    fn finalize(&self, realized: Content, _: StyleChain) -> Content {
+        realized
+            .styled(HeadingElem::set_outlined(false))
+            .styled(HeadingElem::set_numbering(None))
+    }
+}
+
 impl LocalName for OutlineElem {
     fn local_name(&self, lang: Lang) -> &'static str {
         match lang {

tests/typ/meta/bibliography.typ

@@ -30,6 +30,9 @@ And quark! @quark
 
 ---
 #set page(width: 200pt)
+#set heading(numbering: "1.")
+#show bibliography: set heading(numbering: "1.")
+
 = Multiple Bibs
 Now we have multiple bibliographies containing #cite("glacier-melt", "keshav2007read")
 #bibliography(("/works.bib", "/works_too.bib"))