Implement shadows for layer surfaces

niri-config/src/layer_rule.rs

@@ -1,4 +1,4 @@
-use crate::{BlockOutFrom, RegexEq};
+use crate::{BlockOutFrom, CornerRadius, RegexEq, ShadowRule};
 
 #[derive(knuffel::Decode, Debug, Default, Clone, PartialEq)]
 pub struct LayerRule {
@@ -11,6 +11,10 @@ pub struct LayerRule {
     pub opacity: Option<f32>,
     #[knuffel(child, unwrap(argument))]
     pub block_out_from: Option<BlockOutFrom>,
+    #[knuffel(child, default)]
+    pub shadow: ShadowRule,
+    #[knuffel(child)]
+    pub geometry_corner_radius: Option<CornerRadius>,
 }
 
 #[derive(knuffel::Decode, Debug, Default, Clone, PartialEq)]

niri-config/src/lib.rs

@@ -3778,6 +3778,8 @@ mod tests {
                         excludes: vec![],
                         opacity: None,
                         block_out_from: Some(BlockOutFrom::Screencast),
+                        shadow: ShadowRule::default(),
+                        geometry_corner_radius: None,
                     }
                 ],
                 workspaces: vec![