check tray support on inux

Signed-off-by: FTCHD <144691102+FTCHD@users.noreply.github.com>

main.ts

@@ -603,6 +603,43 @@ async function checkVersion() {
     } catch {}
 }
 
+async function checkTraySupport() {
+    let traySupported = false
+
+    try {
+        traySupported = await invoke<boolean>('is_tray_supported')
+    } catch {}
+
+    if (!traySupported) {
+        const msg =
+            'Your desktop environment does not appear to support system tray icons.\n\nRclone UI requires a tray to run. The application will exit automatically in 10 seconds.'
+
+        let alreadyExiting = false
+        const timer = setTimeout(async () => {
+            if (alreadyExiting) return
+            alreadyExiting = true
+            await exit(0)
+        }, 10_000)
+
+        ask(msg, {
+            title: 'Tray Not Supported',
+            kind: 'error',
+            okLabel: 'Exit Now',
+            cancelLabel: 'Cancel',
+        })
+            .then(async (confirmed) => {
+                if (!alreadyExiting && confirmed) {
+                    alreadyExiting = true
+                    clearTimeout(timer)
+                    await exit(0)
+                }
+            })
+            .catch()
+
+        await new Promise(() => {})
+    }
+}
+
 getCurrentWindow().listen('tauri://close-requested', async (e) => {
     console.log('(main) window close requested')
     await getCurrentWindow().destroy()
@@ -617,7 +654,8 @@ getCurrentWindow().listen('rebuild-tray', async (e) => {
     await showDefaultTray()
 })
 
-initTray()
+checkTraySupport()
+    .then(() => initTray())
     .then(() => showLoadingTray())
     .then(() => waitForHydration())
     .then(() => checkVersion())

src-tauri/Cargo.lock

@@ -284,6 +284,7 @@ dependencies = [
  "tauri-plugin-single-instance",
  "tauri-plugin-store",
  "tauri-plugin-updater",
+ "zbus",
  "zip 0.6.6",
 ]
 

src-tauri/Cargo.toml

@@ -48,3 +48,6 @@ sysinfo = "0.37"
 
 [target.'cfg(target_os = "macos")'.dependencies]
 cocoa = "0.26"
+
+[target.'cfg(target_os = "linux")'.dependencies]
+zbus = { version = "5" }

src-tauri/src/lib.rs

@@ -14,6 +14,49 @@ use sysinfo::{System};
 use tauri_plugin_sentry;
 use sentry;
 
+#[tauri::command]
+fn is_tray_supported() -> bool {
+    #[cfg(not(target_os = "linux"))]
+    {
+        return true;
+    }
+
+    #[cfg(target_os = "linux")]
+    {
+        use zbus::blocking::fdo::DBusProxy;
+        use zbus::blocking::{Connection, Proxy};
+
+        let conn = match Connection::session() {
+            Ok(c) => c,
+            Err(_) => return false,
+        };
+
+        let dbus = match DBusProxy::new(&conn) {
+            Ok(p) => p,
+            Err(_) => return false,
+        };
+
+        let candidates = [
+            "org.kde.StatusNotifierWatcher",
+            "org.freedesktop.StatusNotifierWatcher",
+        ];
+
+        for name in candidates {
+            if dbus.name_has_owner(name).unwrap_or(false) {
+                // Try to read the property; if it fails but watcher exists, assume true
+                if let Ok(proxy) = Proxy::new(&conn, name, "/StatusNotifierWatcher", "org.kde.StatusNotifierWatcher") {
+                    if let Ok(registered) = proxy.get_property::<bool>("IsStatusNotifierHostRegistered") {
+                        return registered;
+                    }
+                }
+                return true;
+            }
+        }
+
+        false
+    }
+}
+
 #[tauri::command]
 fn unzip_file(zip_path: &str, output_folder: &str) -> Result<(), String> {
     // Open the zip file
@@ -644,7 +687,7 @@ pub fn run() {
 		.plugin(tauri_plugin_shell::init())
 		.plugin(tauri_plugin_opener::init())
 		.plugin(tauri_plugin_prevent_default::debug())
-        .invoke_handler(tauri::generate_handler![unzip_file, get_arch, get_uid, is_rclone_running, stop_rclone_processes, prompt_password, prompt_text, stop_pid, update_system_rclone, test_proxy_connection])
+		.invoke_handler(tauri::generate_handler![unzip_file, get_arch, get_uid, is_rclone_running, stop_rclone_processes, prompt_password, prompt_text, stop_pid, update_system_rclone, test_proxy_connection, is_tray_supported])
         .setup(|_app| Ok(()))
         // .setup(|app| {
         //     if cfg!(debug_assertions) {