refactor(wayland): put everything in wl_surface user data

src/wayland/utils.rs

@@ -0,0 +1,14 @@
+use smithay::{reexports::wayland_server::protocol::wl_surface::WlSurface, wayland::compositor};
+use std::sync::Arc;
+
+pub fn insert_data<T: Send + Sync + 'static>(wl_surface: &WlSurface, data: T) {
+	insert_data_raw(wl_surface, Arc::new(data))
+}
+pub fn insert_data_raw<T: Send + Sync + 'static>(wl_surface: &WlSurface, data: Arc<T>) {
+	compositor::with_states(wl_surface, |d| {
+		d.data_map.insert_if_missing_threadsafe(move || data)
+	});
+}
+pub fn get_data<T: Send + Sync + 'static>(wl_surface: &WlSurface) -> Option<Arc<T>> {
+	compositor::with_states(wl_surface, |d| d.data_map.get::<Arc<T>>().cloned())
+}