Added too large file check.

Some fixes and refactoring.

src/SmartCommander/Assets/Resources.resx

@@ -300,4 +300,7 @@
   <data name="DirectoryExists" xml:space="preserve">
     <value>Directory {0} already exists.</value>
   </data>
+  <data name="TooLargeSize" xml:space="preserve">
+    <value>Too large file size for viewing.</value>
+  </data>
 </root>

src/SmartCommander/ViewModels/FilesPaneViewModel.cs

@@ -14,6 +14,7 @@
 using System.Reactive;
 using System.Reactive.Linq;
 using System.Runtime.InteropServices;
+using System.Threading.Tasks;
 using Path = System.IO.Path;
 
 namespace SmartCommander.ViewModels
@@ -267,18 +268,23 @@ public void Update()
 
         public void View()
         {
-            View(null);
+            _= View(null);
         }
 
-        public async void View(Action<ButtonResult, object?>? resultAction)
+        public async Task View(Action<ButtonResult, object?>? resultAction)
         {
             if (CurrentItem == null)
                 return;
             if (!CurrentItem.IsFolder)
             {
-                // TODO: check file size
+                if (Convert.ToUInt64(CurrentItem.Size) > 128*1024*1024)
+                {
+                    MessageBox_Show(resultAction, Resources.TooLargeSize, Resources.Alert, ButtonEnum.Ok);
+                    return;
+                }
                 var copy = new ViewerViewModel(CurrentItem.FullName);
                 await ShowViewerDialog.Handle(copy);
+                resultAction?.Invoke(ButtonResult.Ok, null);
             }
             else
             {

src/SmartCommander/ViewModels/MainWindowViewModel.cs

@@ -208,7 +208,7 @@ public void View()
                 return;
             }
             _F3Busy = true;
-            SelectedPane.View(F3Finished);
+            _= SelectedPane.View(F3Finished);
         }
 
         public void Edit()

src/SmartCommander/ViewModels/ViewerViewModel.cs

@@ -10,7 +10,7 @@ public ViewerViewModel(string filename)
             {
                 Text = File.ReadAllText(filename);
             }
-            catch { }
+            catch { Text = ""; }
         }
 
         public string Text { get; set; }

src/SmartCommander/Views/CopyMoveWindow.axaml.cs

@@ -1,6 +1,4 @@
-using Avalonia;
 using Avalonia.Controls;
-using Avalonia.Markup.Xaml;
 
 namespace SmartCommander.Views
 {
@@ -9,14 +7,6 @@ public partial class CopyMoveWindow : Window
         public CopyMoveWindow()
         {
             InitializeComponent();
-#if DEBUG
-            this.AttachDevTools();
-#endif
-        }
-
-        private void InitializeComponent()
-        {
-            AvaloniaXamlLoader.Load(this);
-        }
+        }      
     }
 }

src/SmartCommander/Views/MainWindow.axaml.cs

@@ -17,9 +17,9 @@ public MainWindow()
             Opened += OnOpened;
             InitializeComponent();           
 
-            this.WhenActivated(d => d(ViewModel!.ShowCopyDialog.RegisterHandler(DoShowCopyDialogAsync)));
-            this.WhenActivated(d => d(ViewModel!.ShowOptionsDialog.RegisterHandler(DoShowOptionsDialogAsync)));
-            this.WhenActivated(d => d(ViewModel!.ShowViewerDialog.RegisterHandler(DoShowViewerDialogAsync)));
+            this.WhenActivated(d => d(ViewModel!.ShowCopyDialog.RegisterHandler(DoShowDialogAsync<CopyMoveViewModel, CopyMoveWindow>)));
+            this.WhenActivated(d => d(ViewModel!.ShowOptionsDialog.RegisterHandler(DoShowDialogAsync<OptionsViewModel, OptionsWindow>)));
+            this.WhenActivated(d => d(ViewModel!.ShowViewerDialog.RegisterHandler(DoShowDialogAsync<ViewerViewModel, ViewerWindow>)));
 
             progressWindow = new ProgressWindow();
 
@@ -56,32 +56,14 @@ public MainWindow()
             };
         }
 
-        private async Task DoShowViewerDialogAsync(InteractionContext<ViewerViewModel, ViewerViewModel?> interaction)
+        private async Task DoShowDialogAsync<T1, T2>(InteractionContext<T1, T1?> interaction) where T2 : Window, new()
         {
-            var dialog = new ViewerWindow();
+            var dialog = new T2();
             dialog.DataContext = interaction.Input;
 
-            var result = await dialog.ShowDialog<ViewerViewModel>(this);
+            var result = await dialog.ShowDialog<T1>(this);
             interaction.SetOutput(result);
-        }
-
-        private async Task DoShowCopyDialogAsync(InteractionContext<CopyMoveViewModel, CopyMoveViewModel?> interaction)
-        {
-            var dialog = new CopyMoveWindow();
-            dialog.DataContext = interaction.Input;
-
-            var result = await dialog.ShowDialog<CopyMoveViewModel>(this);
-            interaction.SetOutput(result);
-        }
-
-        private async Task DoShowOptionsDialogAsync(InteractionContext<OptionsViewModel, OptionsViewModel?> interaction)
-        {
-            var dialog = new OptionsWindow();
-            dialog.DataContext = interaction.Input;
-
-            var result = await dialog.ShowDialog<OptionsViewModel>(this);
-            interaction.SetOutput(result);
-        }
+        }     
 
         private void OnOpened(object? sender, EventArgs e)
         {

src/SmartCommander/Views/OptionsWindow.axaml.cs

@@ -1,23 +1,12 @@
-using Avalonia;
 using Avalonia.Controls;
-using Avalonia.Markup.Xaml;
 
 namespace SmartCommander.Views
 {
     public partial class OptionsWindow : Window
     {
         public OptionsWindow()
         {
-            InitializeComponent();
-#if DEBUG
-            this.AttachDevTools();
-#endif           
-
-        }
-
-        private void InitializeComponent()
-        {
-            AvaloniaXamlLoader.Load(this);
-        }
+            InitializeComponent();    
+        }     
     }
 }