feat: corner radius for CosmicMapped

src/shell/element/mod.rs

@@ -848,6 +848,16 @@ impl CosmicMapped {
             _ => unreachable!(),
         }
     }
+
+    pub fn corner_radius(&self, geometry_size: Size<i32, Logical>, default_radius: u8) -> [u8; 4] {
+        match &self.element {
+            CosmicMappedInternal::Window(w) => w
+                .corner_radius(geometry_size)
+                .unwrap_or([default_radius; 4]),
+            CosmicMappedInternal::Stack(s) => s.corner_radius(geometry_size, default_radius),
+            _ => unreachable!(),
+        }
+    }
 }
 
 impl IsAlive for CosmicMapped {

src/shell/element/stack.rs

@@ -785,6 +785,20 @@ impl CosmicStack {
             (Some(max), Some(min)) => Some((max.w.max(min.w), max.h.max(min.h)).into()),
         }
     }
+
+    pub fn corner_radius(&self, geometry_size: Size<i32, Logical>, default_radius: u8) -> [u8; 4] {
+        self.0.with_program(|p| {
+            let active_window = &p.windows.lock().unwrap()[p.active.load(Ordering::SeqCst)];
+            let mut corners = active_window
+                .corner_radius(geometry_size)
+                .unwrap_or([default_radius; 4]);
+
+            corners[1] = 8;
+            corners[3] = 8;
+
+            corners
+        })
+    }
 }
 
 #[derive(Debug, Clone, Copy)]

src/shell/element/window.rs

@@ -421,6 +421,11 @@ impl CosmicWindow {
                 }
             })
     }
+
+    pub fn corner_radius(&self, geometry_size: Size<i32, Logical>) -> Option<[u8; 4]> {
+        self.0
+            .with_program(|p| p.window.corner_radius(geometry_size))
+    }
 }
 
 #[derive(Debug, Clone, Copy)]