Use Ctrl+Click as go to definition.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@4819 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

AddIns/ICSharpCode.SharpDevelop.addin

@@ -1580,7 +1580,11 @@
 			          label = "${res:XML.MainMenu.SearchMenu.GotoLineNr}"
 			          shortcut = "Control|G"
 			          class = "ICSharpCode.SharpDevelop.DefaultEditor.Commands.GotoLineNumber"/>
-			<MenuItem id = "Separator3" type = "Separator" />
+			<MenuItem id = "GotoDefinition"
+			          label = "${res:ICSharpCode.NAntAddIn.GotoDefinitionMenuLabel}"
+			          shortcut = "Control|Return"
+			          icon="Icons.16x16.SelectionArrow"
+			          class = "ICSharpCode.SharpDevelop.Editor.Commands.GoToDefinition"/>
 			<MenuItem id = "GotoBrace"
 			          label = "${res:XML.MainMenu.SearchMenu.GotoBrace}"
 			          shortcut = "Control|B"

src/AddIns/DisplayBindings/AvalonEdit.AddIn/Src/CodeEditor.cs

@@ -5,6 +5,7 @@
 //     <version>$Revision$</version>
 // </file>
 
+using ICSharpCode.SharpDevelop.Editor.Commands;
 using System;
 using System.Collections.ObjectModel;
 using System.Diagnostics;
@@ -17,7 +18,6 @@ using System.Windows.Data;
 using System.Windows.Input;
 using System.Windows.Media;
 using System.Windows.Threading;
-
 using ICSharpCode.AvalonEdit.Document;
 using ICSharpCode.AvalonEdit.Editing;
 using ICSharpCode.AvalonEdit.Highlighting;
@@ -384,7 +384,7 @@ namespace ICSharpCode.AvalonEdit.AddIn
 			TextViewPosition? logicalPos = textEditor.GetPositionFromPoint(mousePos);
 			if (logicalPos.HasValue) {
 				var textView = textEditor.TextArea.TextView;
-				positionInPixels = 
+				positionInPixels =
 					textView.PointToScreen(
 						textView.GetVisualPosition(logicalPos.Value, VisualYPosition.LineBottom) - textView.ScrollOffset);
 				positionInPixels.X -= 4;
@@ -425,6 +425,14 @@ namespace ICSharpCode.AvalonEdit.AddIn
 		{
 			// close existing popup immediately on text editor mouse down
 			tryCloseExistingPopup(false);
+			if (e.ChangedButton == MouseButton.Left && Keyboard.Modifiers == ModifierKeys.Control) {
+				TextEditor editor = GetTextEditorFromSender(sender);
+				var position = editor.GetPositionFromPoint(e.GetPosition(editor));
+				if (position != null) {
+					GoToDefinition.Run(GetAdapterFromSender(sender), document.GetOffset(position.Value));
+					e.Handled = true;
+				}
+			}
 		}
 		
 		/*void textArea_GotFocus(object sender, RoutedEventArgs e)

src/Main/Base/Project/ICSharpCode.SharpDevelop.csproj

@@ -95,6 +95,7 @@
     <Compile Include="Src\Editor\CodeCompletion\TemplateCompletionItemProvider.cs" />
     <Compile Include="Src\Editor\CodeCompletion\TextCompletionItemProvider.cs" />
     <Compile Include="Src\Editor\Commands\CommentRegion.cs" />
+    <Compile Include="Src\Editor\Commands\GoToDefinition.cs" />
     <Compile Include="Src\Editor\Commands\IndentSelection.cs" />
     <Compile Include="Src\Editor\DocumentUtilitites.cs" />
     <Compile Include="Src\Editor\IDocument.cs" />

src/Main/Base/Project/Src/Editor/Commands/GoToDefinition.cs

@@ -0,0 +1,53 @@
+// <file>
+//     <copyright see="prj:///doc/copyright.txt"/>
+//     <license see="prj:///doc/license.txt"/>
+//     <author name="Daniel Grunwald"/>
+//     <version>$Revision$</version>
+// </file>
+
+using ICSharpCode.SharpDevelop.Dom;
+using System;
+using ICSharpCode.Core;
+using ICSharpCode.SharpDevelop.Gui;
+
+namespace ICSharpCode.SharpDevelop.Editor.Commands
+{
+	public class GoToDefinition : AbstractMenuCommand
+	{
+		public override void Run()
+		{
+			ITextEditorProvider editorProvider = WorkbenchSingleton.Workbench.ActiveViewContent as ITextEditorProvider;
+			if (editorProvider != null) {
+				Run(editorProvider.TextEditor, editorProvider.TextEditor.Caret.Offset);
+			}
+		}
+		
+		public static void Run(ITextEditor editor, int offset)
+		{
+			IDocument document = editor.Document;
+			string textContent = document.Text;
+			
+			IExpressionFinder expressionFinder = ParserService.GetExpressionFinder(editor.FileName);
+			if (expressionFinder == null)
+				return;
+			ExpressionResult expression = expressionFinder.FindFullExpression(textContent, offset);
+			if (expression.Expression == null || expression.Expression.Length == 0)
+				return;
+			var caretPos = editor.Document.OffsetToPosition(offset);
+			ResolveResult result = ParserService.Resolve(expression, caretPos.Line, caretPos.Column, editor.FileName, textContent);
+			if (result != null) {
+				FilePosition pos = result.GetDefinitionPosition();
+				if (pos.IsEmpty == false) {
+					try {
+						if (pos.Position.IsEmpty)
+							FileService.OpenFile(pos.FileName);
+						else
+							FileService.JumpToFilePosition(pos.FileName, pos.Line, pos.Column);
+					} catch (Exception ex) {
+						MessageService.ShowException(ex, "Error jumping to '" + pos.FileName + "'.");
+					}
+				}
+			}
+		}
+	}
+}

src/Main/ICSharpCode.SharpDevelop.Dom/Project/Src/Implementations/AbstractMember.cs

@@ -71,6 +71,9 @@ namespace ICSharpCode.SharpDevelop.Dom
 		
 		public AbstractMember(IClass declaringType, string name) : base(declaringType, name)
 		{
+			// members must have a parent class
+			if (declaringType == null)
+				throw new ArgumentNullException("declaringType");
 		}
 		
 		public abstract IMember Clone();

src/Main/ICSharpCode.SharpDevelop.Dom/Project/Src/Interfaces/IMember.cs

@@ -21,7 +21,8 @@ namespace ICSharpCode.SharpDevelop.Dom
 		
 		/// <summary>
 		/// Gets/Sets the declaring type reference (declaring type incl. type arguments).
-		/// Never returns null, if the property is set to null (e.g. when this is not a specialized member),
+		/// Never returns null.
+		/// If the property is set to null (e.g. when this is not a specialized member),
 		/// it should return the default type reference to the <see cref="DeclaringType"/>.
 		/// </summary>
 		IReturnType DeclaringTypeReference {