first workable debugger

Debugger/Debugger.Core/NRefactory/Ast/ExpressionExtensionMethods.cs

@@ -54,7 +54,7 @@ namespace ICSharpCode.NRefactory.Ast
 				if (val != null && val.GetType().FullName == castTo.FullName)
 					return expresion;
 			}
-			return new CastExpression() { Expression = expresion.Parenthesize(), Type = castTo.GetTypeReference() };
+			return new CastExpression() { Expression = expresion.Clone().Parenthesize(), Type = castTo.GetTypeReference() };
 		}
 		
 		public static Expression GetExpression(this DebugLocalVariableInfo locVar)
@@ -95,7 +95,7 @@ namespace ICSharpCode.NRefactory.Ast
 			if (memberInfo.IsStatic) {
 				target = new TypeReferenceExpression() { Type = memberInfo.DeclaringType.GetTypeReference() };
 			} else {
-				target = expresion.Clone().CastTo((DebugType)memberInfo.DeclaringType);
+				target = CastTo(expresion, (DebugType)memberInfo.DeclaringType);
 			}
 			
 			if (memberInfo is DebugFieldInfo) {
@@ -141,7 +141,7 @@ namespace ICSharpCode.NRefactory.Ast
 				throw new DebuggerException("Incorrect number of arguments");
 			List<Expression> typedArgs = new List<Expression>(args.Length);
 			for(int i = 0; i < args.Length; i++) {
-				typedArgs.Add(args[i].Clone().CastTo((DebugType)method.GetParameters()[i].ParameterType));
+				typedArgs.Add(CastTo(args[i], (DebugType)method.GetParameters()[i].ParameterType));
 			}
 			return typedArgs;
 		}

Debugger/ILSpy.Debugger/AvalonEdit/TextEditorWeakEventManager.cs

@@ -50,5 +50,18 @@ namespace ILSpy.Debugger.AvalonEdit
 				source.MouseHoverStopped += DeliverEvent;
 			}
 		}
+		
+		public sealed class MouseDown : WeakEventManagerBase<MouseDown, TextEditor>
+		{
+			protected override void StopListening(TextEditor source)
+			{
+				source.MouseDown -= DeliverEvent;
+			}
+			
+			protected override void StartListening(TextEditor source)
+			{
+				source.MouseDown += DeliverEvent;
+			}
+		}
 	}
 }

Debugger/ILSpy.Debugger/Services/Debugger/DebuggerService.cs

@@ -210,7 +210,11 @@ namespace ILSpy.Debugger.Services
 				e.ContentToShow = null;
 			}
 			else {
+				try {
 					e.ContentToShow = currentDebugger.GetTooltipControl(e.LogicalPosition, variable);
+				} catch {
+					return;
+				}
 			}
 			
 			// FIXME Do proper parsing

Debugger/ILSpy.Debugger/ToolTips/TextEditorListener.cs

@@ -63,9 +63,21 @@ namespace ILSpy.Debugger.ToolTips
 				OnMouseHoverStopped((MouseEventArgs)e);
 			}
 			
+			if (managerType == typeof(ILSpy.Debugger.AvalonEdit.TextEditorWeakEventManager.MouseDown)) {
+				OnMouseDown((MouseEventArgs)e);
+			}
+			
 			return true;
 		}
 		
+		void OnMouseDown(MouseEventArgs mouseEventArgs0)
+		{
+			if (toolTip != null)
+				toolTip.IsOpen = false;
+			
+			TryCloseExistingPopup(true);
+		}
+		
 		void OnMouseHoverStopped(MouseEventArgs e)
 		{			
 			if (toolTip != null)
@@ -185,7 +197,6 @@ namespace ILSpy.Debugger.ToolTips
 			return popup;
 		}
 		
-		
 		bool IWeakEventListener.ReceiveWeakEvent(Type managerType, object sender, EventArgs e)
 		{
 			return ReceiveWeakEvent(managerType, sender, e);

ILSpy/TextView/DecompilerTextView.cs

@@ -86,6 +86,7 @@ namespace ICSharpCode.ILSpy.TextView
 			// wire the mouse events
 			TextEditorWeakEventManager.MouseHover.AddListener(textEditor, TextEditorListener.Instance);
 			TextEditorWeakEventManager.MouseHoverStopped.AddListener(textEditor, TextEditorListener.Instance);
+			TextEditorWeakEventManager.MouseDown.AddListener(textEditor, TextEditorListener.Instance);
 			textEditor.TextArea.TextView.VisualLinesChanged += (s, e) => iconMargin.InvalidateVisual();
 		}