feat: add selection and decoration protocols

compositor/src/handlers/mod.rs

@@ -3,8 +3,20 @@ mod xdg_shell;
 
 use smithay::{
     input::{Seat, SeatHandler, SeatState, pointer::CursorImageStatus},
-    reexports::wayland_server::protocol::wl_surface::WlSurface,
-    wayland::output::OutputHandler,
+    reexports::wayland_server::{Resource, protocol::wl_surface::WlSurface},
+    wayland::{
+        output::OutputHandler,
+        selection::{
+            SelectionHandler,
+            data_device::{
+                ClientDndGrabHandler, DataDeviceHandler, DataDeviceState, ServerDndGrabHandler,
+                set_data_device_focus,
+            },
+            primary_selection::{
+                PrimarySelectionHandler, PrimarySelectionState, set_primary_focus,
+            },
+        },
+    },
 };
 
 use crate::Ferese;
@@ -19,12 +31,40 @@ impl SeatHandler for Ferese {
     }
 
     fn cursor_image(&mut self, _seat: &Seat<Self>, _image: CursorImageStatus) {}
+
+    fn focus_changed(&mut self, seat: &Seat<Self>, focused: Option<&WlSurface>) {
+        let client = focused.and_then(|surface| self.display_handle.get_client(surface.id()).ok());
+        set_data_device_focus(&self.display_handle, seat, client.clone());
+        set_primary_focus(&self.display_handle, seat, client);
+    }
 }
 
 impl OutputHandler for Ferese {}
 
+impl SelectionHandler for Ferese {
+    type SelectionUserData = ();
+}
+
+impl ClientDndGrabHandler for Ferese {}
+impl ServerDndGrabHandler for Ferese {}
+
+impl DataDeviceHandler for Ferese {
+    fn data_device_state(&self) -> &DataDeviceState {
+        &self.data_device_state
+    }
+}
+
+impl PrimarySelectionHandler for Ferese {
+    fn primary_selection_state(&self) -> &PrimarySelectionState {
+        &self.primary_selection_state
+    }
+}
+
 smithay::delegate_compositor!(Ferese);
+smithay::delegate_data_device!(Ferese);
 smithay::delegate_output!(Ferese);
+smithay::delegate_primary_selection!(Ferese);
 smithay::delegate_seat!(Ferese);
 smithay::delegate_shm!(Ferese);
+smithay::delegate_xdg_decoration!(Ferese);
 smithay::delegate_xdg_shell!(Ferese);