Force single instance and close alphabet window on main window close

src-tauri/Cargo.toml

@@ -18,3 +18,6 @@ serde = { version = "1.0.219", features = ["derive"] }
 serde_json = "1.0.141"
 tauri-plugin-os = "2.3.0"
 
+[target.'cfg(not(any(target_os = "android", target_os = "ios")))'.dependencies]
+tauri-plugin-single-instance = "2.3.2"
+

src-tauri/src/lib.rs

@@ -1,9 +1,29 @@
+use tauri::{Manager, WindowEvent};
+
 #[cfg_attr(mobile, tauri::mobile_entry_point)]
 pub fn run() {
     #[allow(unused_variables)]
     tauri::Builder::default()
+        .plugin(tauri_plugin_single_instance::init(|app, args, cwd| {
+            let _ = app
+                .get_webview_window("main")
+                .expect("no main window")
+                .set_focus();
+        }))
         .plugin(tauri_plugin_os::init())
         .invoke_handler(tauri::generate_handler![])
+        .setup(|app| {
+            let main_win = app.get_webview_window("main").unwrap();
+            let main_win_clone = main_win.clone();
+            main_win.on_window_event(move |event| {
+                if let WindowEvent::CloseRequested { api, .. } = event {
+                    if let Some(win) = main_win_clone.app_handle().get_webview_window("alphabet") {
+                        let _ = win.close();
+                    }
+                }
+            });
+            Ok(())
+        })
         .run(tauri::generate_context!())
         .expect("error while running tauri application");
 }