New block spacing model

1 files changed, 14 insertions, 0 deletions

diff --git a/library/src/layout/container.rs b/library/src/layout/container.rs
index d65b78b6..22a9e02e 100644
--- a/library/src/layout/container.rs
+++ b/library/src/layout/container.rs
@@ -1,3 +1,4 @@
+use super::VNode;
 use crate::prelude::*;
 
 /// An inline-level container that sizes content.
@@ -63,9 +64,22 @@ pub struct BlockNode(pub Content);
 
 #[node(LayoutBlock)]
 impl BlockNode {
+    /// The spacing between the previous and this block.
+    #[property(skip)]
+    pub const ABOVE: VNode = VNode::weak(Em::new(1.2).into());
+    /// The spacing between this and the following block.
+    #[property(skip)]
+    pub const BELOW: VNode = VNode::weak(Em::new(1.2).into());
+
     fn construct(_: &mut Vm, args: &mut Args) -> SourceResult<Content> {
         Ok(Self(args.eat()?.unwrap_or_default()).pack())
     }
+
+    fn set(...) {
+        let spacing = args.named("spacing")?.map(VNode::weak);
+        styles.set_opt(Self::ABOVE, args.named("above")?.map(VNode::strong).or(spacing));
+        styles.set_opt(Self::BELOW, args.named("below")?.map(VNode::strong).or(spacing));
+    }
 }
 
 impl LayoutBlock for BlockNode {