FileItem will no longer open more than 1 tab for a file.

Added Ctrl+S shortcut in BaseEditor.

Progrart/Controls/BaseEditor.axaml

@@ -7,5 +7,13 @@
              x:Class="Progrart.Controls.BaseEditor">
 	<avaloniaedit:TextEditor Name="CodeEditBox" Text="" SyntaxHighlighting="JavaScript"
 							 ShowLineNumbers="True"
-							 FontFamily="Sarasa Mono Slab CL,Cascadia Code,Consolas,Menlo,Monospace"/>
+							 FontFamily="Sarasa Mono Slab CL,Cascadia Code,Consolas,Menlo,Monospace">
+        <avaloniaedit:TextEditor.ContextMenu>
+			<ContextMenu>
+				<MenuItem Name="Copy" Click="Copy_Click"/>
+				<MenuItem Name="Cut" Click="Cut_Click"/>
+				<MenuItem Name="Paste" Click="Paste_Click"/>
+            </ContextMenu>
+        </avaloniaedit:TextEditor.ContextMenu>
+    </avaloniaedit:TextEditor>
 </UserControl>

Progrart/Controls/BaseEditor.axaml.cs

@@ -1,37 +1,82 @@
 using Avalonia;
 using Avalonia.Controls;
+using Avalonia.Input;
 using Avalonia.Markup.Xaml;
+using AvaloniaEdit;
 using AvaloniaEdit.TextMate;
+using System;
+using System.Windows.Input;
 using TextMateSharp.Grammars;
 
 namespace Progrart.Controls;
 
 public partial class BaseEditor : UserControl
 {
-	RegistryOptions _registryOptions;
+    RegistryOptions _registryOptions;
-	TextMate.Installation _textMateInstallation;
+    TextMate.Installation _textMateInstallation;
-	public string Text
+    public string Text
-	{
+    {
-		get => CodeEditBox.Text;
+        get => CodeEditBox.Text;
-		set => CodeEditBox.Text = value;
+        set => CodeEditBox.Text = value;
-	}
+    }
-	public BaseEditor()
+    public Action? onSaveCmd;
-	{
+    public BaseEditor()
-		InitializeComponent();
+    {
-		{
+        InitializeComponent();
-			var _textEditor = CodeEditBox;
+        {
-			_registryOptions = new RegistryOptions(ThemeName.DarkPlus);
+            var _textEditor = CodeEditBox;
-			_textMateInstallation = _textEditor.InstallTextMate(_registryOptions);
+            _registryOptions = new RegistryOptions(ThemeName.DarkPlus);
-			_textMateInstallation.SetGrammar(_registryOptions.GetScopeByLanguageId(_registryOptions.GetLanguageByExtension(".js").Id));
+            _textMateInstallation = _textEditor.InstallTextMate(_registryOptions);
-		}
+            _textMateInstallation.SetGrammar(_registryOptions.GetScopeByLanguageId(_registryOptions.GetLanguageByExtension(".js").Id));
-	}
+        }
-	public void SetGrammerByExtension(string extension_name)
+        var saveBinding = new KeyBinding
-	{
+        {
-		_textMateInstallation.SetGrammar(
+            Gesture = new KeyGesture(Key.S, KeyModifiers.Control),
-			_registryOptions.GetScopeByLanguageId(
+            Command = new saveCmd() { onSave = Save }
-				_registryOptions.GetLanguageByExtension(extension_name).Id
+        };
-				)
-			);
 
-	}
+        CodeEditBox.KeyBindings.Add(saveBinding);
+    }
+    void Save()
+    {
+        onSaveCmd?.Invoke();
+    }
+    class saveCmd : ICommand
+    {
+        public event EventHandler? CanExecuteChanged;
+        public Action? onSave;
+        public bool CanExecute(object? parameter)
+        {
+            return true;
+        }
+
+        public void Execute(object? parameter)
+        {
+            onSave?.Invoke();
+        }
+    }
+    public void SetGrammerByExtension(string extension_name)
+    {
+        _textMateInstallation.SetGrammar(
+            _registryOptions.GetScopeByLanguageId(
+                _registryOptions.GetLanguageByExtension(extension_name).Id
+                )
+            );
+
+    }
+
+    private void Copy_Click(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
+    {
+        CodeEditBox.Copy();
+    }
+
+    private void Paste_Click(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
+    {
+        CodeEditBox.Paste();
+    }
+
+    private void Cut_Click(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
+    {
+        CodeEditBox.Cut();
+    }
 }

Progrart/Controls/FileItem.axaml.cs

@@ -149,18 +149,23 @@ public partial class FileItem : UserControl
 		else
 			if (currentItem is IStorageFile file)
 			{
-
+				var btn = EditorProvider.IsOpen(file);
-				if (EditorProvider.TryGetEditor(extension, out var page))
+				if (btn is not null)
 				{
-					if (page is ITabPage editor)
+					EditorProvider.SelectTabPage(btn);
-					{
-						if (page is IEditorPage editor_page)
-						{
-							editor_page.LoadDocument(file);
-						}
-						EditorProvider.OpenEditor(editor);
-					}
 				}
+				else
+					if (EditorProvider.TryGetEditor(extension, out var page))
+					{
+						if (page is ITabPage editor)
+						{
+							if (page is IEditorPage editor_page)
+							{
+								editor_page.LoadDocument(file);
+							}
+							EditorProvider.OpenEditor(editor);
+						}
+					}
 			}
 	}
 	async Task LoadAll(IStorageFolder folder)

Progrart/Controls/TabSystem/TabHost.axaml.cs

@@ -1,6 +1,8 @@
 using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Markup.Xaml;
+using Avalonia.Platform.Storage;
+using Progrart.Pages;
 
 namespace Progrart.Controls.TabSystem;
 
@@ -30,6 +32,17 @@ public partial class TabHost : UserControl
 		page.BindButton(button);
 		SelectButton(button);
 	}
+	public TabButton? IsOpen(IStorageFile file)
+	{
+
+		foreach (var item in TabContainer.Children)
+		{
+			if (item is TabButton itemBtn)
+				if (itemBtn.page is IEditorPage page)
+					if (page.IsSameFile(file)) return itemBtn;
+		}
+		return null;
+	}
 	public void SelectButton(TabButton button)
 	{
 		foreach (var item in TabContainer.Children)

Progrart/Pages/EditorPage.axaml.cs

@@ -24,6 +24,10 @@ public partial class EditorPage : UserControl, ITabPage, IEditorPage
 
 	}
 
+	public bool IsSameFile(IStorageFile file)
+	{
+		return (this.file?.Path == file.Path);
+	}
 	public void BindButton(TabButton button)
 	{
 		btn = button;

Progrart/Pages/EditorProvider.cs

@@ -29,6 +29,14 @@ namespace Progrart.Pages
 		{
 			ExtensionMapping[type] = id;
 		}
+		public static TabButton? IsOpen(IStorageFile file)
+		{
+			return currentHost?.IsOpen(file);
+		}
+		public static void SelectTabPage(TabButton button)
+		{
+			currentHost?.SelectButton(button);
+		}
 		public static void OpenEditor(ITabPage page)
 		{
 			currentHost?.AddPage(page);
@@ -56,6 +64,7 @@ namespace Progrart.Pages
 	{
 		void LoadDocument(IStorageFile file);
 		void Save();
+		bool IsSameFile(IStorageFile file);
 		void Execute(ExecuteArguments? args = null);
 	}
 }

Progrart/Pages/ImageViewPage.axaml.cs

@@ -12,6 +12,7 @@ namespace Progrart.Pages;
 
 public partial class ImageViewPage : UserControl, ITabPage, IEditorPage
 {
+	IStorageFile? file;
 	public ImageViewPage()
 	{
 		InitializeComponent();
@@ -31,15 +32,16 @@ public partial class ImageViewPage : UserControl, ITabPage, IEditorPage
 	{
 		return false;
 	}
-
 	public void LoadDocument(IStorageFile file)
 	{
+		this.file = file;
 		Task.Run(async () =>
 		{
 
 			using var fs = await file.OpenReadAsync();
 			Bitmap bitmap = new Bitmap(fs);
-			Dispatcher.UIThread.Invoke(() => {
+			Dispatcher.UIThread.Invoke(() =>
+			{
 				this.ImageViewer.SetImage(bitmap);
 			});
 		});
@@ -52,4 +54,9 @@ public partial class ImageViewPage : UserControl, ITabPage, IEditorPage
 	public void SetHost(TabHost host)
 	{
 	}
+
+	public bool IsSameFile(IStorageFile file)
+	{
+		return (this.file?.Path == file.Path);
+	}
 }

Progrart/Pages/ProgrartEditorPage.axaml.cs

@@ -21,6 +21,7 @@ public partial class ProgrartEditorPage : UserControl, ITabPage, IEditorPage
 	public ProgrartEditorPage()
 	{
 		InitializeComponent();
+		CodeEditor.onSaveCmd = Save;
 	}
 
 	public void BindButton(TabButton button)
@@ -72,7 +73,12 @@ public partial class ProgrartEditorPage : UserControl, ITabPage, IEditorPage
 		return false;
 	}
 
-	public void LoadDocument(IStorageFile file)
+    public bool IsSameFile(IStorageFile file)
+    {
+		return (this.file?.Path==file.Path);
+    }
+
+    public void LoadDocument(IStorageFile file)
 	{
 		this.file = file;
 		if (btn is not null)