implement Popup to let user choose a part (if there are more than one) to jump to in GoToDefinition

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

@@ -45,7 +45,7 @@ namespace ICSharpCode.AvalonEdit.AddIn
 		/// <inheritdoc />
 		public void ShowContextActionsPopup(ContextActionsPopupViewModel viewModel)
 		{
-			new ContextActionsPopup { Actions = viewModel }.OpenAtCaretAndFocus();
+			new ContextActionsPopup { Actions = viewModel }.OpenAtCursorAndFocus();
 		}
 	}
 }

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

@@ -68,6 +68,7 @@ namespace ICSharpCode.AvalonEdit.AddIn
 			this.MouseLeave += TextEditorMouseLeave;
 			this.Unloaded += OnUnloaded;
 			this.TextArea.TextView.MouseDown += TextViewMouseDown;
+			this.TextArea.TextView.MouseUp += TextViewMouseUp;
 			this.TextArea.Caret.PositionChanged += HighlightBrackets;
 			this.TextArea.TextView.VisualLinesChanged += CodeEditorView_VisualLinesChanged;
 			
@@ -400,10 +401,13 @@ namespace ICSharpCode.AvalonEdit.AddIn
 		#endregion
 		
 		#region Ctrl+Click Go To Definition
+		bool ctrlClickExecuted = false;
+		
 		void TextViewMouseDown(object sender, MouseButtonEventArgs e)
 		{
 			// close existing debugger popup immediately on text editor mouse down
 			TryCloseExistingPopup(false);
+			ctrlClickExecuted = false;
 			
 			if (options.CtrlClickGoToDefinition && e.ChangedButton == MouseButton.Left && Keyboard.Modifiers == ModifierKeys.Control) {
 				// Ctrl+Click Go to definition
@@ -415,8 +419,14 @@ namespace ICSharpCode.AvalonEdit.AddIn
 				var goToDefinitionCommand = new GoToDefinition();
 				goToDefinitionCommand.Run(resolveResult);
 				e.Handled = true;
+				ctrlClickExecuted = true;
 			}
 		}
+		
+		void TextViewMouseUp(object sender, MouseButtonEventArgs e)
+		{
+			e.Handled = options.CtrlClickGoToDefinition && ctrlClickExecuted;
+		}
 		#endregion
 		
 		public void JumpTo(int line, int column)

src/AddIns/DisplayBindings/AvalonEdit.AddIn/Src/ContextActions/ContextActionsPopup.cs

@@ -68,6 +68,13 @@ namespace ICSharpCode.AvalonEdit.AddIn.ContextActions
 			this.Focus();
 		}
 		
+		public void OpenAtCursorAndFocus()
+		{
+			this.Placement = PlacementMode.MousePoint;
+			this.IsOpen = true;
+			this.Focus();
+		}
+		
 		public static void SetPosition(Popup popup, ITextEditor editor, int line, int column, bool openAtWordStart = false)
 		{
 			var editorUIService = editor == null ? null : editor.GetService(typeof(IEditorUIService)) as IEditorUIService;

src/Main/Base/Project/Refactoring/IContextAction.cs

@@ -18,10 +18,9 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 		IContextActionProvider Provider { get; }
 		
 		/// <summary>
-		/// Name displayed in the context action's popup.
+		/// Returns the name displayed in the context action's popup.
 		/// </summary>
 		/// <param name="context">Refactoring context that can be used by the context action to create the display name.</param>
-		/// <returns></returns>
 		string GetDisplayName(EditorRefactoringContext context);
 		
 		/// <summary>

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

@@ -2,12 +2,16 @@
 // This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
 
 using System;
+using System.Collections.ObjectModel;
 using System.IO;
+using System.Linq;
+using ICSharpCode.AvalonEdit.CodeCompletion;
 using ICSharpCode.Core;
+using ICSharpCode.Core.Presentation;
 using ICSharpCode.NRefactory.Semantics;
 using ICSharpCode.NRefactory.TypeSystem;
-using ICSharpCode.SharpDevelop.Gui;
-using ICSharpCode.SharpDevelop.Project;
+using ICSharpCode.SharpDevelop.Editor.ContextActions;
+using ICSharpCode.SharpDevelop.Refactoring;
 
 namespace ICSharpCode.SharpDevelop.Editor.Commands
 {
@@ -18,6 +22,13 @@ namespace ICSharpCode.SharpDevelop.Editor.Commands
 			if (symbol == null)
 				return;
 			
+			var trr = symbol as TypeResolveResult;
+			var def = symbol.Type.GetDefinition();
+			if (trr != null && def != null && def.Parts.Count > 1) {
+				ShowPopupWithPartialClasses(def);
+				return;
+			}
+			
 			DomRegion pos = symbol.GetDefinitionRegion();
 			if (string.IsNullOrEmpty(pos.FileName)) {
 				IEntity entity = GetEntity(symbol);
@@ -35,5 +46,52 @@ namespace ICSharpCode.SharpDevelop.Editor.Commands
 				}
 			}
 		}
+		
+		void ShowPopupWithPartialClasses(ITypeDefinition definition)
+		{
+			var popupViewModel = new ContextActionsPopupViewModel();
+			popupViewModel.Title = MenuService.ConvertLabel(StringParser.Parse(
+				"${res:SharpDevelop.Refactoring.PartsOfClass}", new StringTagPair("Name", definition.Name)));
+			popupViewModel.Actions = new ObservableCollection<ContextActionViewModel>(definition.Parts.Where(p => !p.Region.IsEmpty).Select(MakeViewModel));
+			var uiService = SD.GetActiveViewContentService<IEditorUIService>();
+			if (uiService != null)
+				uiService.ShowContextActionsPopup(popupViewModel);
+		}
+		
+		ContextActionViewModel MakeViewModel(IUnresolvedTypeDefinition entity)
+		{
+			var ambience = AmbienceService.GetCurrentAmbience();
+			ambience.ConversionFlags = ConversionFlags.ShowDeclaringType | ConversionFlags.ShowTypeParameterList;
+			return new ContextActionViewModel {
+				Action = new GoToDomRegionAction(entity.Region),
+				Image = CompletionImage.GetImage(entity),
+				Comment = string.Format("(in {0})", Path.GetDirectoryName(entity.Region.FileName)),
+				ChildActions = null
+			};
+		}
+		
+		class GoToDomRegionAction : IContextAction
+		{
+			DomRegion target;
+			
+			public GoToDomRegionAction(DomRegion target)
+			{
+				this.target = target;
+			}
+			
+			public string GetDisplayName(EditorRefactoringContext context)
+			{
+				return Path.GetFileName(target.FileName);
+			}
+			
+			public void Execute(EditorRefactoringContext context)
+			{
+				SD.FileService.JumpToFilePosition(new FileName(target.FileName), target.BeginLine, target.BeginColumn);
+			}
+			
+			IContextActionProvider IContextAction.Provider {
+				get { return null; }
+			}
+		}
 	}
 }