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Nitrox.Launcher/AppViewLocator.cs

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+using System;
+using Avalonia;
+using Avalonia.Controls.ApplicationLifetimes;
+using HanumanInstitute.MvvmDialogs;
+using HanumanInstitute.MvvmDialogs.Avalonia;
+using Microsoft.Extensions.DependencyInjection;
+using Nitrox.Launcher.Models.Design;
+using Nitrox.Launcher.ViewModels;
+using Nitrox.Launcher.Views;
+
+namespace Nitrox.Launcher;
+
+public sealed class AppViewLocator : ViewLocatorBase
+{
+    private static IServiceProvider serviceProvider;
+
+    public AppViewLocator(IServiceProvider serviceProvider)
+    {
+        AppViewLocator.serviceProvider = serviceProvider;
+    }
+
+    private static MainWindow mainWindow;
+    public static MainWindow MainWindow
+    {
+        get
+        {
+            if (mainWindow != null)
+            {
+                return mainWindow;
+            }
+
+            if (Application.Current?.ApplicationLifetime is ClassicDesktopStyleApplicationLifetime desktop)
+            {
+                return mainWindow = (MainWindow)desktop.MainWindow;
+            }
+            throw new NotSupportedException("This Avalonia application is only supported on desktop environments.");
+        }
+    }
+
+    public static IRoutingScreen HostScreen => serviceProvider.GetRequiredService<IRoutingScreen>();
+
+    public override ViewDefinition Locate(object viewModel)
+    {
+        // Only dialogs need to be mapped here. Other views are handled in MainWindow.axaml.
+        static Type GetViewType(object viewModel) => viewModel switch
+        {
+            CreateServerViewModel => typeof(CreateServerModal),
+            DialogBoxViewModel => typeof(DialogBoxModal),
+            ObjectPropertyEditorViewModel => typeof(ObjectPropertyEditorModal),
+            BackupRestoreViewModel => typeof(BackupRestoreModal),
+            _ => throw new ArgumentOutOfRangeException(nameof(viewModel), viewModel, null)
+        };
+
+        Type newView = GetViewType(viewModel);
+        return new ViewDefinition(newView, () => serviceProvider.GetRequiredService(newView));
+    }
+}