Dev/fix warnigs

src/SmartCommander/Assets/Resources.resx

@@ -306,4 +306,7 @@
   <data name="Reboot" xml:space="preserve">
     <value>*Application restart required</value>
   </data>
+  <data name="AllowOnlyOneInstance" xml:space="preserve">
+    <value>Allow only one Instance</value>
+  </data>
 </root>

src/SmartCommander/Assets/Resources.ru-RU.resx

@@ -306,4 +306,7 @@
   <data name="Reboot" xml:space="preserve">
     <value>*Требуется перезапуск приложения</value>
   </data>
+  <data name="AllowOnlyOneInstance" xml:space="preserve">
+    <value>Разрешать только один экземпляр приложения</value>
+  </data>
 </root>

src/SmartCommander/Converters/BitmapValueConverter.cs

@@ -27,7 +27,7 @@ public class BitmapValueConverter : IValueConverter
                 }
                 else
                 {
-                    var assemblyName = Assembly.GetEntryAssembly().GetName().Name;
+                    var assemblyName = Assembly.GetEntryAssembly()?.GetName().Name;
                     uri = new Uri($"avares://{assemblyName}/{rawUri}");
                 }
 

src/SmartCommander/Models/OptionsModel.cs

@@ -53,6 +53,7 @@ static OptionsModel()
         public string RightPanePath { get; set; } = "";
 
         public bool IsDarkThemeEnabled { get; set; }
+        public bool AllowOnlyOneInstance { get; set; } = true;
         public string Language { get; set; } = "en-US";
 
     }

src/SmartCommander/Program.cs

@@ -1,53 +1,41 @@
 using Avalonia;
 using Avalonia.ReactiveUI;
+using SmartCommander.Models;
 using System;
+using System.Diagnostics;
 using System.IO;
 using System.IO.Pipes;
-using System.Runtime.InteropServices;
 
 namespace SmartCommander
 {
     internal class Program
     {
-        static FileStream? _lockFile;
         // Initialization code. Don't use any Avalonia, third-party APIs or any
         // SynchronizationContext-reliant code before AppMain is called: things aren't initialized
         // yet and stuff might break.
         [STAThread]
         public static void Main(string[] args)
         {
-            var exception = false;
+            var haveSecondInstance = false;
             var dir = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "SmartCommander");
             Directory.CreateDirectory(dir);
-            try
-            {
-                if (!RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
-                {
-                    _lockFile = File.Open(Path.Combine(dir, ".lock"), FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.None);
-                    _lockFile.Lock(0, 0);
-                }              
-                BuildAvaloniaApp()
-                .StartWithClassicDesktopLifetime(args);   
-            }
-            catch
-            {
-                exception = true;
-            }
 
-            if (exception)
+            string currentProcessName = Process.GetCurrentProcess().ProcessName;
+            var runningProcesses = Process.GetProcessesByName(currentProcessName);
+            haveSecondInstance = (runningProcesses.Length > 1);
+
+            if (haveSecondInstance && OptionsModel.Instance.AllowOnlyOneInstance)
             {
-                try
-                {
                     var client = new NamedPipeClientStream("SmartCommanderActivation");
                     client.Connect(1000);
                     using (StreamWriter writer = new StreamWriter(client))
                     {
                         writer.WriteLine("ActivateSmartCommander");
-                        writer.Flush();                    
+                        writer.Flush();
                     }
-
-                }
-                catch { }
+            }
+            else {
+                BuildAvaloniaApp().StartWithClassicDesktopLifetime(args);
             }
 
         }

src/SmartCommander/ViewModels/CopyMoveViewModel.cs

@@ -31,18 +31,12 @@ public CopyMoveViewModel(bool copy, string text, string directory)
 
         public void SaveClose(Window window)
         {
-            if (window != null)
-            {
-                window.Close(this);
-            }
+            window?.Close(this);
         }
 
         public void Close(Window window)
         {
-            if (window != null)
-            {
-                window.Close();
-            }
+            window?.Close(this);
         }
     }
 }

src/SmartCommander/ViewModels/FileViewModel.cs

@@ -89,13 +89,13 @@ public string Name
                 // moving here is fast since they are guaranteed to be on the same drive
                 if (IsFolder)
                 {
-                    destination = Path.Combine(Path.GetDirectoryName(FullName), value);
+                    destination = Path.Combine(Path.GetDirectoryName(FullName) ?? "", value);
                     Directory.Move(FullName, destination);
                 }
                 else
                 {
-                    destination = Path.Combine(Path.GetDirectoryName(FullName), value + "." + Extension);
-                    File.Move(FullName, destination);                   
+                    destination = Path.Combine(Path.GetDirectoryName(FullName) ?? "", value);
+                    File.Move(FullName, destination);
                 }
                 _name = value;
                 FullName = destination;

src/SmartCommander/ViewModels/FilesPaneViewModel.cs

@@ -46,8 +46,8 @@ public string CurrentDirectory
             {
                 _currentDirectory = value;
                 GetFilesFolders(CurrentDirectory, FoldersFilesList);
-                this.RaisePropertyChanged("CurrentDirectory");
-                this.RaisePropertyChanged("CurrentDirectoryInfo");
+                this.RaisePropertyChanged(nameof(CurrentDirectory));
+                this.RaisePropertyChanged(nameof(CurrentDirectoryInfo));
             }
         }
 
@@ -90,7 +90,7 @@ public bool IsSelected
             set
             {
                 _isSelected = value;
-                this.RaisePropertyChanged("GridBorderBrush");
+                this.RaisePropertyChanged(nameof(GridBorderBrush));
 
                 if (value)
                 {
@@ -100,7 +100,7 @@ public bool IsSelected
         }
 
 
-        public bool IsCurrentDirectoryDisplayed
+        public static bool IsCurrentDirectoryDisplayed
         {
             get => OptionsModel.Instance.IsCurrentDirectoryDisplayed;
         }
@@ -112,13 +112,14 @@ public bool IsCurrentDirectoryDisplayed
 
         public ObservableCollection<FileViewModel> FoldersFilesList { get; set; } = new ObservableCollection<FileViewModel>();
 
-        public FilesPaneViewModel()
+        public FilesPaneViewModel(EventHandler focusHandler)
         {
             _mainVM = new MainWindowViewModel();
             ShowViewerDialog = new Interaction<ViewerViewModel, ViewerViewModel?>();
+            FocusChanged += focusHandler;
         }
 
-        public FilesPaneViewModel(MainWindowViewModel mainVM)
+        public FilesPaneViewModel(MainWindowViewModel mainVM, EventHandler focusHandler)
         {
             CurrentDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
             ViewCommand = ReactiveCommand.Create(View);
@@ -129,6 +130,7 @@ public FilesPaneViewModel(MainWindowViewModel mainVM)
             FilesPaneBackspaceCommand = ReactiveCommand.Create(() => ProcessCurrentItem(true));
             ShowViewerDialog = new Interaction<ViewerViewModel, ViewerViewModel?>();
             _mainVM = mainVM;
+            FocusChanged += focusHandler;
         }
 
         public ReactiveCommand<Unit, Unit>? FilesPaneEnterCommand { get; }

src/SmartCommander/ViewModels/MainWindowViewModel.cs

@@ -39,11 +39,9 @@ public MainWindowViewModel()
             F8Command = ReactiveCommand.Create(Delete);
             OptionsCommand = ReactiveCommand.CreateFromTask(ShowOptions);
 
-            LeftFileViewModel = new FilesPaneViewModel(this);
-            LeftFileViewModel.FocusChanged += OnFocusChanged;
-
-            RightFileViewModel = new FilesPaneViewModel(this);
-            RightFileViewModel.FocusChanged += OnFocusChanged;
+            LeftFileViewModel = new FilesPaneViewModel(this, OnFocusChanged);
+            RightFileViewModel = new FilesPaneViewModel(this, OnFocusChanged);
+            SelectedPane = RightFileViewModel;
 
             if (!string.IsNullOrEmpty(OptionsModel.Instance.LeftPanePath))
             {
@@ -88,7 +86,6 @@ private void OnFocusChanged(object? sender, EventArgs e)
         public ReactiveCommand<Unit, Unit> F6Command { get; }
         public ReactiveCommand<Unit, Unit> F7Command { get; }
         public ReactiveCommand<Unit, Unit> F8Command { get; }
-        public ReactiveCommand<Unit, Unit> TabCommand { get; }
         public ReactiveCommand<Unit, Unit> OptionsCommand { get; }
 
         public FilesPaneViewModel LeftFileViewModel { get; }
@@ -112,16 +109,16 @@ public string CommandText
             set
             {
                 _commandText = value;
-                this.RaisePropertyChanged("CommandText");
+                this.RaisePropertyChanged(nameof(CommandText));
             }
         }
 
         public Interaction<CopyMoveViewModel, CopyMoveViewModel?> ShowCopyDialog { get; }
 
         public Interaction<OptionsViewModel, OptionsViewModel?> ShowOptionsDialog { get; }      
 
-        public bool IsFunctionKeysDisplayed => OptionsModel.Instance.IsFunctionKeysDisplayed;
-        public bool IsCommandLineDisplayed => OptionsModel.Instance.IsCommandLineDisplayed;
+        public static bool IsFunctionKeysDisplayed => OptionsModel.Instance.IsFunctionKeysDisplayed;
+        public static bool IsCommandLineDisplayed => OptionsModel.Instance.IsCommandLineDisplayed;
 
         public void Exit()
         {
@@ -544,10 +541,10 @@ public async Task ShowOptions()
             var result = await ShowOptionsDialog.Handle(optionsModel);
             if (result != null)
             {
-                this.RaisePropertyChanged("IsFunctionKeysDisplayed");
-                this.RaisePropertyChanged("IsCommandLineDisplayed");
-                SelectedPane.RaisePropertyChanged("IsCurrentDirectoryDisplayed");
-                SecondPane.RaisePropertyChanged("IsCurrentDirectoryDisplayed");
+                this.RaisePropertyChanged(nameof(IsFunctionKeysDisplayed));
+                this.RaisePropertyChanged(nameof(IsCommandLineDisplayed));
+                SelectedPane.RaisePropertyChanged(nameof(FilesPaneViewModel.IsCurrentDirectoryDisplayed));
+                SecondPane.RaisePropertyChanged(nameof(FilesPaneViewModel.IsCurrentDirectoryDisplayed));
                 SetTheme();
             }
         }

src/SmartCommander/ViewModels/OptionsViewModel.cs

@@ -51,10 +51,11 @@ public OptionsViewModel()
             ConfirmationWhenDeleteNonEmpty = Model.ConfirmationWhenDeleteNonEmpty;
             SaveWindowPositionSize = Model.SaveWindowPositionSize;
             IsDarkThemeEnabled = Model.IsDarkThemeEnabled;
+            AllowOnlyOneInstance = Model.AllowOnlyOneInstance;
 
             AvailableCultures = new ObservableCollection<CultureInfo>(GetAvailableCultures());
-            var lang = AvailableCultures.FirstOrDefault(x => x.Name == Model.Language);
-            SelectedCulture = lang is null ? AvailableCultures.FirstOrDefault() : lang;
+            var lang = AvailableCultures.First(x => x.Name == Model.Language);
+            SelectedCulture = lang ?? AvailableCultures.First();
         }
 
         public bool IsCurrentDirectoryDisplayed { get; set; }       
@@ -72,6 +73,7 @@ public OptionsViewModel()
         public bool SaveWindowPositionSize { get; set; }
 
         public bool IsDarkThemeEnabled { get; set; }        
+        public bool AllowOnlyOneInstance { get; set; }        
 
         public ReactiveCommand<Window, Unit> OKCommand { get; }
         public ReactiveCommand<Window, Unit> CancelCommand { get; }
@@ -87,12 +89,11 @@ public void SaveClose(Window window)
             Model.SaveWindowPositionSize = SaveWindowPositionSize;
             Model.IsDarkThemeEnabled = IsDarkThemeEnabled;
             Model.Language = SelectedCulture.Name;
+            Model.AllowOnlyOneInstance = AllowOnlyOneInstance;
 
             Model.Save();
-            if (window != null)
-            {
-                window.Close(this);
-            }
+            window?.Close(this);
+
         }
 
         public void Close(Window window)

src/SmartCommander/Views/OptionsWindow.axaml

@@ -2,8 +2,8 @@
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-        mc:Ignorable="d" d:DesignWidth="600" d:DesignHeight="300"
-        Width="600" Height="300"
+        mc:Ignorable="d" d:DesignWidth="600" d:DesignHeight="350"
+        Width="600" Height="350"
         x:Class="SmartCommander.Views.OptionsWindow"
         ShowInTaskbar="False"
         Icon="/Assets/main.ico"
@@ -33,6 +33,8 @@
 					Content="{x:Static assets:Resources.DisplayCommandLine}"></CheckBox>
           <CheckBox IsChecked="{Binding SaveWindowPositionSize}"
 					Content="{x:Static assets:Resources.SaveWindowPositionSize}"></CheckBox>
+		  <CheckBox IsChecked="{Binding AllowOnlyOneInstance}"
+					Content="{x:Static assets:Resources.AllowOnlyOneInstance}"></CheckBox>
           <RadioButton IsChecked="{Binding !IsDarkThemeEnabled}"
 					Content="{x:Static assets:Resources.LightTheme}"></RadioButton>
           <RadioButton IsChecked="{Binding IsDarkThemeEnabled}"