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

@@ -1,7 +1,11 @@
 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;
@@ -15,6 +19,7 @@ public partial class BaseEditor : UserControl
         get => CodeEditBox.Text;
         set => CodeEditBox.Text = value;
     }
+    public Action? onSaveCmd;
     public BaseEditor()
     {
         InitializeComponent();
@@ -24,6 +29,31 @@ public partial class BaseEditor : UserControl
             _textMateInstallation = _textEditor.InstallTextMate(_registryOptions);
             _textMateInstallation.SetGrammar(_registryOptions.GetScopeByLanguageId(_registryOptions.GetLanguageByExtension(".js").Id));
         }
+        var saveBinding = new KeyBinding
+        {
+            Gesture = new KeyGesture(Key.S, KeyModifiers.Control),
+            Command = new saveCmd() { onSave = Save }
+        };
+
+        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)
     {
@@ -34,4 +64,19 @@ public partial class BaseEditor : UserControl
             );
 
     }
+
+    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

@@ -149,7 +149,12 @@ public partial class FileItem : UserControl
 		else
 			if (currentItem is IStorageFile file)
 			{
-
+				var btn = EditorProvider.IsOpen(file);
+				if (btn is not null)
+				{
+					EditorProvider.SelectTabPage(btn);
+				}
+				else
 					if (EditorProvider.TryGetEditor(extension, out var page))
 					{
 						if (page is ITabPage editor)

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)
@@ -72,6 +73,11 @@ public partial class ProgrartEditorPage : UserControl, ITabPage, IEditorPage
 		return false;
 	}
 
+    public bool IsSameFile(IStorageFile file)
+    {
+		return (this.file?.Path==file.Path);
+    }
+
     public void LoadDocument(IStorageFile file)
 	{
 		this.file = file;