Working clipboard support, albeit by hacks.

Info.plist

@@ -4,10 +4,8 @@
 <dict>
 	<key>CFBundleDocumentTypes</key>
 	<array/>
-	<key>CFBundleIconFiles</key>
-	<array>
-		<string>dead_bush.icns</string>
-	</array>
+	<key>CFBundleIconFile</key>
+	<string>nbte.icns</string>
 	<key>CFBundleIdentifier</key>
 	<string>jaquadro.NBTExplorer</string>
 	<key>CFBundleName</key>

Mac/AppDelegate.cs

@@ -156,6 +156,21 @@ namespace NBTExplorer
 			get { return _menuInsertCompound; }
 		}
 
+		partial void ActionCut (MonoMac.Foundation.NSObject sender)
+		{
+			mainWindowController.Window.ActionCut();
+		}
+
+		partial void ActionCopy (MonoMac.Foundation.NSObject sender)
+		{
+			mainWindowController.Window.ActionCopy();
+		}
+
+		partial void ActionPaste (MonoMac.Foundation.NSObject sender)
+		{
+			mainWindowController.Window.ActionPaste();
+		}
+
 		partial void ActionRename (NSObject sender)
 		{
 			mainWindowController.Window.ActionRenameValue();

Mac/MainWindow.cs

@@ -33,6 +33,7 @@ namespace NBTExplorer
 		{
 			InitializeIconRegistry();
 			FormHandlers.Register();
+			NbtClipboardController.Initialize(new NbtClipboardControllerMac());
 		}
 
 		private AppDelegate _appDelegate;
@@ -360,6 +361,21 @@ namespace NBTExplorer
 			get { return _mainOutlineView.ItemAtRow (_mainOutlineView.SelectedRow) as TreeDataNode; }
 		}
 
+		public void ActionCopy ()
+		{
+			CopyNode (SelectedNode);
+		}
+
+		public void ActionCut ()
+		{
+			CutNode (SelectedNode);
+		}
+
+		public void ActionPaste ()
+		{
+			PasteNode (SelectedNode);
+		}
+
 		public void ActionEditValue ()
 		{
 			EditNode(SelectedNode);
@@ -440,6 +456,48 @@ namespace NBTExplorer
 			CreateNode (SelectedNode, TagType.TAG_COMPOUND);
 		}
 
+		private void CopyNode (TreeDataNode node)
+		{
+			if (node == null)
+				return;
+
+			if (!node.Data.CanCopyNode)
+				return;
+			
+			node.Data.CopyNode();
+		}
+		
+		private void CutNode (TreeDataNode node)
+		{
+			if (node == null)
+				return;
+
+			if (!node.Data.CanCutNode)
+				return;
+
+			if (node.Data.CutNode()) {
+				TreeDataNode parent = node.Parent;
+				UpdateUI(parent.Data);
+				node.Remove();
+				_mainOutlineView.ReloadItem(parent, true);
+			}
+		}
+		
+		private void PasteNode (TreeDataNode node)
+		{
+			if (node == null)
+				return;
+
+			if (!node.Data.CanPasteIntoNode)
+				return;
+
+			if (node.Data.PasteNode()) {
+				//node.Text = dataNode.NodeDisplay;
+				RefreshChildNodes(node, node.Data);
+				UpdateUI(node.Data);
+			}
+		}
+
 		private void EditNode (TreeDataNode node)
 		{
 			if (node == null)
@@ -622,9 +680,9 @@ namespace NBTExplorer
 			_appDelegate.MenuInsertCompound.Enabled = node.CanCreateTag(TagType.TAG_COMPOUND);
 
 			_appDelegate.MenuSave.Enabled = CheckModifications();
-			_appDelegate.MenuCopy.Enabled = node.CanCopyNode;
-			_appDelegate.MenuCut.Enabled = node.CanCutNode;
-			_appDelegate.MenuPaste.Enabled = node.CanPasteIntoNode;
+			_appDelegate.MenuCopy.Enabled = node.CanCopyNode && NbtClipboardController.IsInitialized;
+			_appDelegate.MenuCut.Enabled = node.CanCutNode && NbtClipboardController.IsInitialized;
+			_appDelegate.MenuPaste.Enabled = node.CanPasteIntoNode && NbtClipboardController.IsInitialized;
 			_appDelegate.MenuDelete.Enabled = node.CanDeleteNode;
 			_appDelegate.MenuEditValue.Enabled = node.CanEditNode;
 			_appDelegate.MenuRename.Enabled = node.CanRenameNode;

Mac/NbtClipboardControllerMac.cs

@@ -0,0 +1,175 @@
+using System;
+using MonoMac.AppKit;
+using MonoMac.Foundation;
+using MonoMac.ObjCRuntime;
+using Substrate.Nbt;
+using System.Runtime.InteropServices;
+
+namespace NBTExplorer.Mac
+{
+	public class NbtClipboardControllerMac : INbtClipboardController
+	{
+		public void CopyToClipboard (NbtClipboardData data)
+		{
+			NbtClipboardDataMac dataItem = new NbtClipboardDataMac(data);
+
+			NSPasteboard pasteboard = NSPasteboard.GeneralPasteboard;
+			pasteboard.ClearContents();
+			pasteboard.WriteObjects(new NSPasteboardReading[] { dataItem });
+		}
+
+		public NbtClipboardData CopyFromClipboard ()
+		{
+			NSPasteboard pasteboard = NSPasteboard.GeneralPasteboard;
+			NSObject[] items = pasteboard.ReadObjectsForClasses (new NSPasteboardReading[] { NbtClipboardDataMac.Type }, new NSDictionary());
+
+			foreach (NbtClipboardDataMac item in items) {
+				if (item == null)
+					continue;
+
+				TagNode node = item.Node;
+				if (node == null)
+					continue;
+
+				return new NbtClipboardData(item.Name, node);
+			}
+
+			return null;
+		}
+
+		public bool ContainsData
+		{
+			get {  
+				NSPasteboard pasteboard = NSPasteboard.GeneralPasteboard;
+				NSObject[] items = pasteboard.ReadObjectsForClasses (new NSPasteboardReading[] { NbtClipboardDataMac.Type }, new NSDictionary());
+				return items != null && items.Length > 0;
+			}
+		}
+	}
+
+	[Adopts("NSCoding")]
+	[Adopts("NSPasteboardReading")]
+	[Adopts("NSPasteboardWriting")]
+	[Register("NbtClipboardDataMac")]
+	public class NbtClipboardDataMac : NSPasteboardReading
+	{
+		static AdoptsAttribute _writingProtocol = new AdoptsAttribute ("NSPasteboardWriting");
+		static AdoptsAttribute _readingProtocol = new AdoptsAttribute ("NSPasteboardReading");
+		static AdoptsAttribute _codingProtocol = new AdoptsAttribute("NSCoding");
+
+		private static string _pasteboardItemName = "jaquadro.nbtexplorer.nbtClipboardDataMac";
+
+		public static NbtClipboardDataMac Type
+		{
+			get { 
+				NbtClipboardDataMac inst = new NbtClipboardDataMac ();
+				return inst;
+			}
+		}
+
+		private string _name;
+		private byte[] _data;
+
+		private bool _bypassProtocolCheck = true;
+
+		private NbtClipboardDataMac ()
+		{
+			_name = "";
+			_data = new byte[0];
+		}
+
+		public NbtClipboardDataMac (NbtClipboardData data)
+		{
+			Name = data.Name;
+			Node = data.Node;
+		}
+
+		public override bool ConformsToProtocol (IntPtr protocol)
+		{
+			// XXX: This is a hack!  There seems to be a bug in MonoMac resulting in different handle addresses
+			// for two protocols of (seemingly) the same name, so we have no way to make objc accept that we
+			// implement a given protocol.  objc runtime method protocol_getName should be able to help us, but it
+			// crashes the runtime.
+			if (_bypassProtocolCheck)
+				return true;
+
+			if (protocol == _readingProtocol.ProtocolHandle)
+				return true;
+			if (protocol == _writingProtocol.ProtocolHandle)
+				return true;
+			if (protocol == _codingProtocol.ProtocolHandle)
+				return true;
+			return base.ConformsToProtocol (protocol);
+		}
+
+		public string Name
+		{
+			get { return _name; }
+			set { _name = value; }
+		}
+
+		public TagNode Node
+		{
+			get { return NbtClipboardData.DeserializeNode(_data); }
+			set { _data = NbtClipboardData.SerializeNode(value); }
+		}
+
+		[Export ("initWithCoder:")]
+		public NbtClipboardDataMac (NSCoder coder)
+			: base(NSObjectFlag.Empty)
+		{
+			_name = (NSString)coder.DecodeObject("name");
+			_data = coder.DecodeBytes("data");
+		}
+
+		[Export ("encodeWithCoder:")]
+		public void Encode (NSCoder coder)
+		{
+			coder.Encode ((NSString)_name, "name");
+			coder.Encode (_data, "data");
+		}
+
+		[Export("writableTypesForPasteboard:")]
+		public string[] GetWritableTypesForPasteboard (NSPasteboard pasteboard)
+		{
+			return new string[] { _pasteboardItemName };
+		}
+
+		[Export("pasteboardPropertyListForType:")]
+		public NSObject GetPasteboardPropertyListForType (string type)
+		{
+			if (type == _pasteboardItemName)
+				return NSKeyedArchiver.ArchivedDataWithRootObject(this);
+			else
+				return null;
+		}
+
+		[Export ("writingOptionsForType:pasteboard:")]
+		public NSPasteboardWritingOptions GetWritingOptionsForType (string type, NSPasteboard pasteboard)
+		{
+			return 0;
+		}
+
+		public override string[] GetReadableTypesForPasteboard (NSPasteboard pasteboard)
+		{
+			return new string[] { _pasteboardItemName };
+		}
+
+		public override NSPasteboardReadingOptions GetReadingOptionsForType (string type, NSPasteboard pasteboard)
+		{
+			if (type == _pasteboardItemName)
+				return NSPasteboardReadingOptions.AsKeyedArchive;
+			else
+				return 0;
+		}
+
+		// XXX: This is a hack.  Not sure how to properly implement, but it's required either by pasteboard reading,
+		// or is a side-effect of our protocol conformance hack.
+		[Export("isSubclassOfClass:")]
+		public bool IsSubclassOf (NSObject cl)
+		{
+			return false;
+		}
+	}
+}
+

NBTExplorerMac.csproj

@@ -69,8 +69,8 @@
     </Reference>
     <Reference Include="System.Windows.Forms" />
     <Reference Include="System.Data" />
-    <Reference Include="MonoMac, Version=0.0.0.0, Culture=neutral">
-      <Private>False</Private>
+    <Reference Include="MonoMac">
+      <HintPath>..\monomac\src\MonoMac.dll</HintPath>
     </Reference>
   </ItemGroup>
   <ItemGroup>
@@ -183,6 +183,8 @@
     <Compile Include="Mac\EditValueWindow.designer.cs">
       <DependentUpon>EditValueWindow.cs</DependentUpon>
     </Compile>
+    <Compile Include="NbtClipboardController.cs" />
+    <Compile Include="Mac\NbtClipboardControllerMac.cs" />
   </ItemGroup>
   <ItemGroup>
     <BundleResource Include="Resources\Dead_Bush.png" />
@@ -244,4 +246,8 @@
     <InterfaceDefinition Include="Mac\CreateNodeWindow.xib" />
     <InterfaceDefinition Include="Mac\EditValueWindow.xib" />
   </ItemGroup>
+  <ItemGroup>
+    <Content Include="Resources\Dead_Bush_256.icns" />
+    <Content Include="nbte.icns" />
+  </ItemGroup>
 </Project>