Initial version of file viewer.

src/SmartCommander/ViewModels/FilesPaneViewModel.cs

@@ -1,7 +1,6 @@
 using Avalonia.Controls;
 using Avalonia.Input;
 using Avalonia.Media;
-using Microsoft.CodeAnalysis.CSharp.Syntax;
 using MsBox.Avalonia.Enums;
 using ReactiveUI;
 using SmartCommander.Assets;
@@ -12,7 +11,6 @@
 using System.Diagnostics;
 using System.IO;
 using System.Linq;
-using System.Linq.Expressions;
 using System.Reactive;
 using System.Reactive.Linq;
 using System.Runtime.InteropServices;
@@ -54,11 +52,8 @@ public string CurrentDirectory
 
         private MainWindowViewModel _mainVM;
 
-        public string CurrentDirectoryInfo
-        {
-            get { return string.Format(Resources.CurrentDirInfo, _totalFiles, _totalFolders); }
-        }
-
+        public string CurrentDirectoryInfo => string.Format(Resources.CurrentDirInfo, _totalFiles, _totalFolders);
+
         public FileViewModel? CurrentItem { get; set; }
 
         public List<FileViewModel> CurrentItems { get; set; } = new List<FileViewModel>();
@@ -112,6 +107,7 @@ public bool IsCurrentDirectoryDisplayed
         public FilesPaneViewModel()
         {
             _mainVM = new MainWindowViewModel();
+            ShowViewerDialog = new Interaction<ViewerViewModel, ViewerViewModel?>();
         }
 
         public FilesPaneViewModel(MainWindowViewModel mainVM)
@@ -121,6 +117,7 @@ public FilesPaneViewModel(MainWindowViewModel mainVM)
             EditCommand = ReactiveCommand.Create(Edit);
             ZipCommand = ReactiveCommand.Create(Zip);
             UnzipCommand = ReactiveCommand.Create(Unzip);
+            ShowViewerDialog = new Interaction<ViewerViewModel, ViewerViewModel?>();
             _mainVM = mainVM;
         }
 
@@ -130,6 +127,8 @@ public FilesPaneViewModel(MainWindowViewModel mainVM)
         public ReactiveCommand<Unit, Unit>? ZipCommand { get; }
         public ReactiveCommand<Unit, Unit>? UnzipCommand { get; }
 
+        public Interaction<ViewerViewModel, ViewerViewModel?> ShowViewerDialog { get; }
+
         public void CellPointerPressed(object sender, object parameter)
         {
             _mainVM.SelectedPane = this;
@@ -271,21 +270,15 @@ public void View()
             View(null);
         }
 
-        public void View(Action<ButtonResult, object?>? resultAction)
+        public async void View(Action<ButtonResult, object?>? resultAction)
         {
             if (CurrentItem == null)
                 return;
             if (!CurrentItem.IsFolder)
             {
-                if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
-                {
-                    LaunchProcess("less", CurrentItem.FullName);
-                }
-                else if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
-                {
-                    Process.Start("LTFViewr5u.exe", CurrentItem.FullName);
-                }               
-                resultAction?.Invoke(ButtonResult.Ok,null);                
+                // TODO: check file size
+                var copy = new ViewerViewModel(CurrentItem.FullName);
+                await ShowViewerDialog.Handle(copy);
             }
             else
             {

src/SmartCommander/ViewModels/MainWindowViewModel.cs

@@ -100,6 +100,8 @@ public string CommandText
 
         public Interaction<OptionsViewModel, OptionsViewModel?> ShowOptionsDialog { get; }
 
+        public Interaction<ViewerViewModel, ViewerViewModel?> ShowViewerDialog => LeftFileViewModel.ShowViewerDialog;
+
         public bool IsFunctionKeysDisplayed => OptionsModel.Instance.IsFunctionKeysDisplayed;
         public bool IsCommandLineDisplayed => OptionsModel.Instance.IsCommandLineDisplayed;
 
@@ -219,7 +221,7 @@ public void Edit()
             SelectedPane.Edit(F4Finished);
         }
 
-        public bool IsBackgroundOperation { get { return tokenSource != null && !tokenSource.IsDisposed; } }
+        public bool IsBackgroundOperation => tokenSource != null && !tokenSource.IsDisposed; 
 
         public void Cancel()
         {

src/SmartCommander/ViewModels/ViewerViewModel.cs

@@ -0,0 +1,18 @@
+using System.IO;
+
+namespace SmartCommander.ViewModels
+{
+    public class ViewerViewModel : ViewModelBase
+    {
+        public ViewerViewModel(string filename)
+        {
+            try
+            {
+                Text = File.ReadAllText(filename);
+            }
+            catch { }
+        }
+
+        public string Text { get; set; }
+    }
+}

src/SmartCommander/Views/MainWindow.axaml.cs

@@ -19,6 +19,7 @@ public MainWindow()
 
             this.WhenActivated(d => d(ViewModel!.ShowCopyDialog.RegisterHandler(DoShowCopyDialogAsync)));
             this.WhenActivated(d => d(ViewModel!.ShowOptionsDialog.RegisterHandler(DoShowOptionsDialogAsync)));
+            this.WhenActivated(d => d(ViewModel!.ShowViewerDialog.RegisterHandler(DoShowViewerDialogAsync)));
 
             progressWindow = new ProgressWindow();
 
@@ -53,7 +54,16 @@ public MainWindow()
                     progressWindow.Close();
                 }
             };
-        }        
+        }
+
+        private async Task DoShowViewerDialogAsync(InteractionContext<ViewerViewModel, ViewerViewModel?> interaction)
+        {
+            var dialog = new ViewerWindow();
+            dialog.DataContext = interaction.Input;
+
+            var result = await dialog.ShowDialog<ViewerViewModel>(this);
+            interaction.SetOutput(result);
+        }
 
         private async Task DoShowCopyDialogAsync(InteractionContext<CopyMoveViewModel, CopyMoveViewModel?> interaction)
         {

src/SmartCommander/Views/ViewerWindow.axaml

@@ -0,0 +1,12 @@
+<Window xmlns="https://github.com/avaloniaui"
+        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="800" d:DesignHeight="450"
+		ShowInTaskbar="True"
+		WindowState="Maximized"
+        x:Class="SmartCommander.ViewerWindow"
+        Title="SmartCommander Viewer">	
+         <TextBlock Text="{Binding Text}" ScrollViewer.VerticalScrollBarVisibility="Visible" ></TextBlock>		
+
+</Window>

src/SmartCommander/Views/ViewerWindow.axaml.cs

@@ -0,0 +1,11 @@
+using Avalonia.Controls;
+
+namespace SmartCommander;
+
+public partial class ViewerWindow : Window
+{
+    public ViewerWindow()
+    {
+        InitializeComponent();
+    }   
+}