[desktop] Fix tauri unexpected exits

desktop/tauri/src-tauri/src/main.rs

@@ -22,7 +22,7 @@ use log::{debug, error, info, LevelFilter};
 use portmaster::PortmasterExt;
 use tauri_plugin_log::RotationStrategy;
 use traymenu::setup_tray_menu;
-use window::{close_splash_window, create_main_window};
+use window::{close_splash_window, create_main_window, hide_splash_window};
 
 #[macro_use]
 extern crate lazy_static;
@@ -77,7 +77,11 @@ impl portmaster::Handler for WsHandler {
         // so we don't show the splash-screen when we loose connection.
         self.is_first_connect = false;
 
-        if let Err(err) = close_splash_window(&self.handle) {
+        // The order is important. If all current windows are destroyed tauri will exit.
+        // First create the main ui window then destroy the splash screen.
+
+        // Hide splash screen. Will be closed after main window is created.
+        if let Err(err) = hide_splash_window(&self.handle) {
             error!("failed to close splash window: {}", err.to_string());
         }
 
@@ -90,6 +94,11 @@ impl portmaster::Handler for WsHandler {
             debug!("created main window")
         }
 
+        // Now it is safe to destroy the splash window.
+        if let Err(err) = close_splash_window(&self.handle) {
+            error!("failed to close splash window: {}", err.to_string());
+        }
+
         let handle = self.handle.clone();
         tauri::async_runtime::spawn(async move {
             traymenu::tray_handler(cli, handle).await;

desktop/tauri/src-tauri/src/window.rs

@@ -98,6 +98,13 @@ pub fn close_splash_window(app: &AppHandle) -> Result<()> {
     return Err(tauri::Error::WindowNotFound);
 }
 
+pub fn hide_splash_window(app: &AppHandle) -> Result<()> {
+    if let Some(window) = app.get_webview_window("splash") {
+        return window.hide();
+    }
+    return Err(tauri::Error::WindowNotFound);
+}
+
 /// Opens a window for the tauri application.
 ///
 /// If the main window has already been created, it is instructed to