1 files changed, 32 insertions, 0 deletions
diff --git a/src/library/hidden.rs b/src/library/hidden.rs
new file mode 100644
index 00000000..7287bf3d
--- /dev/null
+++ b/src/library/hidden.rs
@@ -0,0 +1,32 @@
+//! Hiding of nodes without affecting layout.
+
+use super::prelude::*;
+
+/// A node that hides its child without affecting layout.
+#[derive(Debug, Hash)]
+pub struct HideNode(pub PackedNode);
+
+#[class]
+impl HideNode {
+    fn construct(_: &mut EvalContext, args: &mut Args) -> TypResult<Node> {
+        Ok(Node::inline(Self(args.expect("body")?)))
+    }
+}
+
+impl Layout for HideNode {
+    fn layout(
+        &self,
+        ctx: &mut LayoutContext,
+        regions: &Regions,
+        styles: StyleChain,
+    ) -> Vec<Constrained<Rc<Frame>>> {
+        let mut frames = self.0.layout(ctx, regions, styles);
+
+        // Clear the frames.
+        for Constrained { item: frame, .. } in &mut frames {
+            *frame = Rc::new(Frame { elements: vec![], ..**frame });
+        }
+
+        frames
+    }
+}