ei: add support for libei

src/ei/ei_ifs.rs

@@ -0,0 +1,44 @@
+macro_rules! ei_device_interface {
+    ($camel:ident, $snake:ident, $field:ident) => {
+        impl EiDeviceInterface for $camel {
+            fn new(device: &Rc<EiDevice>, version: EiVersion) -> Rc<Self> {
+                let v = Rc::new(Self {
+                    id: device.client.new_id(),
+                    client: device.client.clone(),
+                    tracker: Default::default(),
+                    version,
+                    device: device.clone(),
+                });
+                track!(v.client, v);
+                v
+            }
+
+            fn destroy(&self) -> Result<(), EiClientError> {
+                self.send_destroyed(self.client.serial());
+                self.client.remove_obj(self)?;
+                self.device.seat.$field.take();
+                Ok(())
+            }
+
+            fn send_destroyed(&self, serial: u32) {
+                self.client.event(crate::wire_ei::$snake::Destroyed {
+                    self_id: self.id,
+                    serial,
+                });
+            }
+        }
+    };
+}
+
+pub mod ei_button;
+pub mod ei_callback;
+pub mod ei_connection;
+pub mod ei_device;
+pub mod ei_handshake;
+pub mod ei_keyboard;
+pub mod ei_pingpong;
+pub mod ei_pointer;
+pub mod ei_pointer_absolute;
+pub mod ei_scroll;
+pub mod ei_seat;
+pub mod ei_touchscreen;