Code Quality: Reduce splash screen display time for faster startup (#13020)

Author: hishitetsu

src/Files.App/App.xaml.cs

@@ -47,6 +47,7 @@ public partial class App : Application
 		private static bool ShowErrorNotification = false;
 		public static string OutputPath { get; set; }
 		public static CommandBarFlyout? LastOpenedFlyout { get; set; }
+		public static bool IsSplashScreenLoading { get; set; }
 
 		public static StorageHistoryWrapper HistoryWrapper { get; } = new();
 		public static AppModel AppModel { get; private set; }
@@ -213,11 +214,9 @@ async Task ActivateAsync()
 				// Wait for the Window to initialize
 				await Task.Delay(10);
 
+				IsSplashScreenLoading = true;
 				MainWindow.Instance.ShowSplashScreen();
 
-				// Wait for the UI to update
-				await Task.Delay(500);
-
 				// Get AppActivationArguments
 				var appActivationArguments = Microsoft.Windows.AppLifecycle.AppInstance.GetCurrent().GetActivatedEventArgs();
 
@@ -235,6 +234,15 @@ async Task ActivateAsync()
 				Logger = Ioc.Default.GetRequiredService<ILogger<App>>();
 				Logger.LogInformation($"App launched. Launch args type: {appActivationArguments.Data.GetType().Name}");
 
+				// Wait for the UI to update
+				for (var i = 0; i < 50; i++)
+				{
+					if (IsSplashScreenLoading)
+						await Task.Delay(10);
+					else
+						break;
+				}
+
 				_ = InitializeAppComponentsAsync().ContinueWith(t => Logger.LogWarning(t.Exception, "Error during InitializeAppComponentsAsync()"), TaskContinuationOptions.OnlyOnFaulted);
 
 				_ = MainWindow.Instance.InitializeApplication(appActivationArguments.Data);

src/Files.App/Views/SplashScreenPage.xaml

@@ -12,6 +12,8 @@
 		<Image
 			x:Name="MainSplashScreenImage"
 			Width="420"
+			ImageFailed="Image_ImageFailed"
+			ImageOpened="Image_ImageOpened"
 			Source="\Assets\AppTiles\Dev\SplashScreen.png" />
 
 		<ProgressRing

src/Files.App/Views/SplashScreenPage.xaml.cs

@@ -1,6 +1,7 @@
 // Copyright (c) 2023 Files Community
 // Licensed under the MIT License. See the LICENSE.
 
+using Microsoft.UI.Xaml;
 using Microsoft.UI.Xaml.Controls;
 
 namespace Files.App.Views
@@ -14,5 +15,15 @@ public SplashScreenPage()
 		{
 			InitializeComponent();
 		}
+
+		private void Image_ImageOpened(object sender, RoutedEventArgs e)
+		{
+			App.IsSplashScreenLoading = false;
+		}
+
+		private void Image_ImageFailed(object sender, RoutedEventArgs e)
+		{
+			App.IsSplashScreenLoading = false;
+		}
 	}
 }