gtk: handle exit of service properly

Cargo.toml

@@ -28,7 +28,7 @@ futures-core = "0.3.28"
 futures = "0.3.28"
 clap = { version="4.4.11", features = ["derive"] }
 gtk = { package = "gtk4", version = "0.7.2", features = ["v4_2"], optional = true }
-adw = { package = "libadwaita", version = "0.5.2", features = ["v1_1"], optional = true }
+adw = { package = "libadwaita", version = "0.5.2", features = ["v1_2"], optional = true }
 async-channel = { version = "2.1.1", optional = true }
 
 [target.'cfg(unix)'.dependencies]

src/frontend/gtk.rs

@@ -129,7 +129,14 @@ fn build_ui(app: &Application) {
     window.imp().stream.borrow_mut().replace(tx);
     glib::spawn_future_local(clone!(@weak window => async move {
         loop {
-            let notify = receiver.recv().await.unwrap();
+            let notify = receiver.recv().await;
+            let notify = match notify {
+                Ok(n) => n,
+                _ => {
+                    window.show_exit_dialog("service exited");
+                    break;
+                }
+            };
             match notify {
                 FrontendNotify::NotifyClientActivate(handle, active) => {
                     window.activate_client(handle, active);

src/frontend/gtk/window.rs

@@ -1,6 +1,6 @@
 mod imp;
 
-use std::io::Write;
+use std::{io::Write, process};
 
 use adw::prelude::*;
 use adw::subclass::prelude::*;
@@ -218,4 +218,16 @@ impl Window {
         let toast_overlay = &self.imp().toast_overlay;
         toast_overlay.add_toast(toast);
     }
+
+    pub fn show_exit_dialog(&self, msg: &str) {
+        let dialog = adw::MessageDialog::builder()
+            .transient_for(self)
+            // .heading(msg)
+            .body(msg)
+            .build();
+
+        dialog.add_response("close", "Close");
+        dialog.connect_response(Some("close"), move |_, _| process::exit(1));
+        dialog.show();
+    }
 }