Fix linebreak after inline objects with metadata

Author: laurmaedje

library/src/layout/par.rs

@@ -318,7 +318,8 @@ impl Segment<'_> {
             Self::Text(len) => len,
             Self::Spacing(_) => SPACING_REPLACE.len_utf8(),
             Self::Box(_, true) => SPACING_REPLACE.len_utf8(),
-            Self::Equation(_) | Self::Box(_, _) | Self::Meta => OBJ_REPLACE.len_utf8(),
+            Self::Equation(_) | Self::Box(_, _) => OBJ_REPLACE.len_utf8(),
+            Self::Meta => 0,
         }
     }
 }
@@ -334,6 +335,8 @@ enum Item<'a> {
     Fractional(Fr, Option<(&'a BoxElem, StyleChain<'a>)>),
     /// Layouted inline-level content.
     Frame(Frame),
+    /// Metadata.
+    Meta(Frame),
 }
 
 impl<'a> Item<'a> {
@@ -351,6 +354,7 @@ impl<'a> Item<'a> {
             Self::Text(shaped) => shaped.text.len(),
             Self::Absolute(_) | Self::Fractional(_, _) => SPACING_REPLACE.len_utf8(),
             Self::Frame(_) => OBJ_REPLACE.len_utf8(),
+            Self::Meta(_) => 0,
         }
     }
 
@@ -360,7 +364,7 @@ impl<'a> Item<'a> {
             Self::Text(shaped) => shaped.width,
             Self::Absolute(v) => *v,
             Self::Frame(frame) => frame.width(),
-            Self::Fractional(_, _) => Abs::zero(),
+            Self::Fractional(_, _) | Self::Meta(_) => Abs::zero(),
         }
     }
 }
@@ -585,7 +589,6 @@ fn collect<'a>(
             full.push(if frac { SPACING_REPLACE } else { OBJ_REPLACE });
             Segment::Box(elem, frac)
         } else if child.is::<MetaElem>() {
-            full.push(OBJ_REPLACE);
             Segment::Meta
         } else {
             bail!(child.span(), "unexpected paragraph child");
@@ -670,7 +673,7 @@ fn prepare<'a>(
             Segment::Meta => {
                 let mut frame = Frame::new(Size::zero());
                 frame.meta(styles, true);
-                items.push(Item::Frame(frame));
+                items.push(Item::Meta(frame));
             }
         }
 
@@ -1336,7 +1339,7 @@ fn commit(
                 let frame = shaped.build(vt, justification_ratio, extra_justification);
                 push(&mut offset, frame);
             }
-            Item::Frame(frame) => {
+            Item::Frame(frame) | Item::Meta(frame) => {
                 push(&mut offset, frame.clone());
             }
         }

tests/ref/meta/query-figure.png

@@ -1,35 +1,4 @@
-// Test the query function.
-
----
-#set page(
-  paper: "a7",
-  margin: (y: 1cm, x: 0.5cm),
-  header: {
-    smallcaps[Typst Academy]
-    h(1fr)
-    locate(it => {
-      let after = query(selector(heading).after(it), it)
-      let before = query(selector(heading).before(it), it)
-      let elem = if before.len() != 0 {
-        before.last()
-      } else if after.len() != 0 {
-        after.first()
-      }
-      emph(elem.body)
-    })
-  }
-)
-
-#outline()
-
-= Introduction
-#lorem(35)
-
-= Background
-#lorem(35)
-
-= Approach
-#lorem(60)
+// Test a list of figures.
 
 ---
 #set page(

tests/ref/meta/query-header.png

@@ -0,0 +1,32 @@
+// Test creating a header with the query function.
+
+---
+#set page(
+  paper: "a7",
+  margin: (y: 1cm, x: 0.5cm),
+  header: {
+    smallcaps[Typst Academy]
+    h(1fr)
+    locate(it => {
+      let after = query(selector(heading).after(it), it)
+      let before = query(selector(heading).before(it), it)
+      let elem = if before.len() != 0 {
+        before.last()
+      } else if after.len() != 0 {
+        after.first()
+      }
+      emph(elem.body)
+    })
+  }
+)
+
+#outline()
+
+= Introduction
+#lorem(35)
+
+= Background
+#lorem(35)
+
+= Approach
+#lorem(60)

tests/ref/meta/query.png

@@ -0,0 +1,18 @@
+// Test linebreaks with after inline elements.
+
+---
+// Test punctuation after citations.
+#set page(width: 162pt)
+
+They can look for the details in @netwok,
+which is the authorative source.
+
+#bibliography("/works.bib")
+
+---
+// Test punctuation after math equations.
+#set page(width: 85pt)
+
+We prove $1 < 2$. \
+We prove $1 < 2$! \
+We prove $1 < 2$– \