Show truncation indicator when display values exceed limit

Signed-off-by: Dimitar Dimitrov <dimitar@spiraldb.com>

Author: dimitarvdimitrov

vortex-array/src/display/mod.rs

@@ -490,7 +490,13 @@ impl dyn DynArray + '_ {
                             .map_or_else(|e| format!("<error: {e}>"), |s| s.to_string()))
                         .format(sep)
                 )?;
-                write!(f, "{}", if f.alternate() { "\n]" } else { "]" })
+                let ellipsis = if self.len() > limit {
+                    format!("{sep}...")
+                } else {
+                    "".to_string()
+                };
+                let closing_brace = if f.alternate() { "\n]" } else { "]" };
+                write!(f, "{ellipsis}{closing_brace}",)
             }
             DisplayOptions::TreeDisplay {
                 buffers,
@@ -583,6 +589,7 @@ mod test {
     use crate::arrays::BoolArray;
     use crate::arrays::ListArray;
     use crate::arrays::StructArray;
+    use crate::display::DISPLAY_LIMIT;
     use crate::dtype::FieldNames;
     use crate::validity::Validity;
 
@@ -596,6 +603,15 @@ mod test {
 
         let x = buffer![1, 2, 3, 4].into_array();
         assert_eq!(x.display_values().to_string(), "[1i32, 2i32, 3i32, 4i32]");
+
+        let x = crate::arrays::PrimitiveArray::from_iter(
+            0i32..i32::try_from(DISPLAY_LIMIT).unwrap() + 1,
+        )
+        .into_array();
+        assert_eq!(
+            x.display_values().to_string(),
+            "[0i32, 1i32, 2i32, 3i32, 4i32, 5i32, 6i32, 7i32, 8i32, 9i32, 10i32, 11i32, 12i32, 13i32, 14i32, 15i32, ...]"
+        );
     }
 
     #[test]