Fix SD-1787 - Memory Leak in ContextActionsBulbPopup

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

@@ -217,10 +217,11 @@ namespace ICSharpCode.AvalonEdit.AddIn
 				TextCopied(this, e);
 		}
 
-		protected virtual void DisposeTextEditor(TextEditor textEditor)
+		protected virtual void DisposeTextEditor(CodeEditorView textEditor)
 		{
 			// detach IconBarMargin from IconBarManager
 			textEditor.TextArea.LeftMargins.OfType<IconBarMargin>().Single().TextView = null;
+			textEditor.Dispose();
 		}
 		
 		void textEditor_GotFocus(object sender, RoutedEventArgs e)
@@ -332,9 +333,9 @@ namespace ICSharpCode.AvalonEdit.AddIn
 				// remove secondary editor
 				this.Children.Remove(secondaryTextEditor);
 				this.Children.Remove(gridSplitter);
+				secondaryTextEditorAdapter.Language.Detach();
 				DisposeTextEditor(secondaryTextEditor);
 				secondaryTextEditor = null;
-				secondaryTextEditorAdapter.Language.Detach();
 				secondaryTextEditorAdapter = null;
 				gridSplitter = null;
 				this.RowDefinitions.RemoveAt(this.RowDefinitions.Count - 1);
@@ -574,6 +575,9 @@ namespace ICSharpCode.AvalonEdit.AddIn
 			if (errorPainter != null)
 				errorPainter.Dispose();
 			this.Document = null;
+			DisposeTextEditor(primaryTextEditor);
+			if (secondaryTextEditor != null)
+				DisposeTextEditor(secondaryTextEditor);
 		}
 	}
 }

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

@@ -34,7 +34,7 @@ namespace ICSharpCode.AvalonEdit.AddIn
 	/// There can be two CodeEditorView instances in a single CodeEditor if split-view
 	/// is enabled.
 	/// </summary>
-	public class CodeEditorView : SharpDevelopTextEditor
+	public class CodeEditorView : SharpDevelopTextEditor, IDisposable
 	{
 		public ITextEditor Adapter { get; set; }
 		
@@ -61,6 +61,11 @@ namespace ICSharpCode.AvalonEdit.AddIn
 			SetupTabSnippetHandler();
 		}
 		
+		public virtual void Dispose()
+		{
+			contextActionsRenderer.Dispose();
+		}
+		
 		protected override string FileName {
 			get { return this.Adapter.FileName; }
 		}

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

@@ -18,7 +18,7 @@ namespace ICSharpCode.AvalonEdit.AddIn
 	/// <summary>
 	/// Renders Popup with context actions on the left side of the current line in the editor.
 	/// </summary>
-	public class ContextActionsRenderer
+	public sealed class ContextActionsRenderer : IDisposable
 	{
 		readonly CodeEditorView editorView;
 		ITextEditor Editor { get { return this.editorView.Adapter; } }
@@ -36,12 +36,11 @@ namespace ICSharpCode.AvalonEdit.AddIn
 		public bool IsEnabled
 		{
 			get {
-				try {
 				string fileName = this.Editor.FileName;
-					return fileName.EndsWith(".cs") || fileName.EndsWith(".vb");
-				} catch {
+				if (String.IsNullOrEmpty(fileName))
 					return false;
-				}
+				return fileName.EndsWith(".cs", StringComparison.OrdinalIgnoreCase)
+					|| fileName.EndsWith(".vb", StringComparison.OrdinalIgnoreCase);
 			}
 		}
 		
@@ -59,10 +58,16 @@ namespace ICSharpCode.AvalonEdit.AddIn
 			this.delayMoveTimer = new DispatcherTimer() { Interval = TimeSpan.FromMilliseconds(delayMoveMilliseconds) };
 			this.delayMoveTimer.Stop();
 			this.delayMoveTimer.Tick += TimerMoveTick;
-			WorkbenchSingleton.Workbench.ViewClosed += WorkbenchSingleton_Workbench_ViewClosed;
 			WorkbenchSingleton.Workbench.ActiveViewContentChanged += WorkbenchSingleton_Workbench_ActiveViewContentChanged;
 		}
 		
+		public void Dispose()
+		{
+			ClosePopup();
+			WorkbenchSingleton.Workbench.ActiveViewContentChanged -= WorkbenchSingleton_Workbench_ActiveViewContentChanged;
+			delayMoveTimer.Stop();
+		}
+		
 		void ContextActionsRenderer_KeyDown(object sender, KeyEventArgs e)
 		{
 			if (this.popup == null)
@@ -131,26 +136,14 @@ namespace ICSharpCode.AvalonEdit.AddIn
 			this.popup.IsHiddenActionsExpanded = false;
 			this.popup.ViewModel = null;
 		}
-		
-		void WorkbenchSingleton_Workbench_ViewClosed(object sender, ViewContentEventArgs e)
-		{
-			try {
-				// prevent memory leaks
-				if (e.Content.PrimaryFileName == this.Editor.FileName) {
-					WorkbenchSingleton.Workbench.ViewClosed -= WorkbenchSingleton_Workbench_ViewClosed;
-					WorkbenchSingleton.Workbench.ActiveViewContentChanged -= WorkbenchSingleton_Workbench_ActiveViewContentChanged;
-				}
-			} catch {}
-		}
-
 		void WorkbenchSingleton_Workbench_ActiveViewContentChanged(object sender, EventArgs e)
 		{
-			ClosePopup();
-			try {
 			// open the popup again if in current file
-				if (((IViewContent)WorkbenchSingleton.Workbench.ActiveContent).PrimaryFileName == this.Editor.FileName)
+			IViewContent activeViewContent = WorkbenchSingleton.Workbench.ActiveViewContent;
+			if (activeViewContent != null && activeViewContent.PrimaryFileName == this.Editor.FileName)
 				CaretPositionChanged(this, EventArgs.Empty);
-			} catch {}
+			else // otherwise close popup
+				ClosePopup();
 		}
 	}
 }