Fixed SD2-525: Changing the output Window font changes the text editor window font.

Fixed SD2-526: Output Window Word Wrap does nothing.
Improved performance of output window and error list when there are many errors/warnings. (previously 3000 warnings caused the SharpDevelop to freeze for 30 seconds and then crash with an OutOfMemoryException, consuming 2 GB of memory; now the speed is much better and the memory usage is fixed)

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@875 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

data/options/SharpDevelopProperties.xml

@@ -1,3 +1,8 @@
 <SharpDevelopProperties>
   <ShowTipsAtStartup value="True" />
+  <Properties name="WorkbenchMemento">
+    <bounds value="10,10,780,560" />
+    <windowstate value="Maximized" />
+    <defaultstate value="Maximized" />
+  </Properties>
 </SharpDevelopProperties>

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

@@ -13,6 +13,13 @@
     <SignAssembly>True</SignAssembly>
     <AssemblyOriginatorKeyFile>Resources\ICSharpCode.SharpDevelop.snk</AssemblyOriginatorKeyFile>
     <AssemblyOriginatorKeyMode>File</AssemblyOriginatorKeyMode>
+    <AllowUnsafeBlocks>False</AllowUnsafeBlocks>
+    <RegisterForComInterop>False</RegisterForComInterop>
+    <GenerateSerializationAssemblies>Auto</GenerateSerializationAssemblies>
+    <BaseAddress>4194304</BaseAddress>
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <FileAlignment>4096</FileAlignment>
+    <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <Optimize>False</Optimize>

src/Main/Base/Project/Src/Commands/BuildCommands.cs

@@ -20,7 +20,9 @@ namespace ICSharpCode.SharpDevelop.Project.Commands
 		public static void BeforeBuild()
 		{
 			TaskService.BuildMessageViewCategory.ClearText();
+			TaskService.InUpdate = true;
 			TaskService.ClearExceptCommentTasks();
+			TaskService.InUpdate = false;
 			ICSharpCode.SharpDevelop.Commands.SaveAllFiles.SaveAll();
 		}
 		
@@ -32,6 +34,7 @@ namespace ICSharpCode.SharpDevelop.Project.Commands
 			if (results != null) {
 				LastErrorCount = 0;
 				LastWarningCount = 0;
+				TaskService.InUpdate = true;
 				foreach (CompilerError error in results.Errors) {
 					TaskService.Add(new Task(error));
 					if (error.IsWarning)
@@ -39,6 +42,7 @@ namespace ICSharpCode.SharpDevelop.Project.Commands
 					else
 						LastErrorCount++;
 				}
+				TaskService.InUpdate = false;
 				if (results.Errors.Count > 0) {
 					WorkbenchSingleton.Workbench.GetPad(typeof(ErrorListPad)).BringPadToFront();
 				}
@@ -112,26 +116,13 @@ namespace ICSharpCode.SharpDevelop.Project.Commands
 	
 	public class BuildProject : AbstractMenuCommand
 	{
-		
-		public static void ShowResults(CompilerResults results)
-		{
-			if (results != null) {
-				foreach (CompilerError error in results.Errors) {
-					TaskService.Add(new Task(error));
-				}
-				if (results.Errors.Count > 0) {
-					WorkbenchSingleton.Workbench.GetPad(typeof(ErrorListPad)).BringPadToFront();
-				}
-			}
-		}
-		
 		public override void Run()
 		{
 			Build.BeforeBuild();
 			if (ProjectService.OpenSolution == null) {
 				Build.AddNoSingleFileCompilationError();
 			} else {
-				BuildProject.ShowResults(ProjectService.CurrentProject.Build());
+				Build.ShowResults(ProjectService.CurrentProject.Build());
 			}
 			Build.AfterBuild();
 		}
@@ -145,7 +136,7 @@ namespace ICSharpCode.SharpDevelop.Project.Commands
 			if (ProjectService.OpenSolution == null) {
 				Build.AddNoSingleFileCompilationError();
 			} else {
-				BuildProject.ShowResults(ProjectService.CurrentProject.Rebuild());
+				Build.ShowResults(ProjectService.CurrentProject.Rebuild());
 			}
 			Build.AfterBuild();
 		}
@@ -159,7 +150,7 @@ namespace ICSharpCode.SharpDevelop.Project.Commands
 			if (ProjectService.OpenSolution == null) {
 				Build.AddNoSingleFileCompilationError();
 			} else {
-				BuildProject.ShowResults(ProjectService.CurrentProject.Clean());
+				Build.ShowResults(ProjectService.CurrentProject.Clean());
 			}
 		}
 	}
@@ -172,7 +163,7 @@ namespace ICSharpCode.SharpDevelop.Project.Commands
 			if (ProjectService.OpenSolution == null) {
 				Build.AddNoSingleFileCompilationError();
 			} else {
-				BuildProject.ShowResults(ProjectService.CurrentProject.Publish());
+				Build.ShowResults(ProjectService.CurrentProject.Publish());
 			}
 		}
 	}

src/Main/Base/Project/Src/Gui/Dialogs/OptionPanels/OutputWindowOptionsPanel.cs

@@ -51,8 +51,5 @@ namespace ICSharpCode.SharpDevelop.Gui.OptionPanels
 			PropertyService.Set(OutputWindowsProperty, properties);
 			return true;
 		}
-		
-		
-		
 	}
 }

src/Main/Base/Project/Src/Gui/Pads/CompilerMessageView/CompilerMessageView.cs

@@ -37,8 +37,10 @@ namespace ICSharpCode.SharpDevelop.Gui
 			}
 		}
 		
-		TextEditorControl textEditorControl = new TextEditorControl();
-		Panel             myPanel           = new Panel();
+		//TextEditorControl textEditorControl = new TextEditorControl();
+		RichTextBox textEditorControl = new RichTextBox();
+		Panel myPanel = new Panel();
+		ToolStrip toolStrip;
 		
 		List<MessageViewCategory> messageCategories = new List<MessageViewCategory>();
 		
@@ -51,7 +53,7 @@ namespace ICSharpCode.SharpDevelop.Gui
 				if (selectedCategory != value) {
 					selectedCategory = value;
 					textEditorControl.Text = (value < 0) ? "" : messageCategories[value].Text;
-					textEditorControl.Refresh();
+					//textEditorControl.Refresh();
 					OnSelectedCategoryIndexChanged(EventArgs.Empty);
 				}
 			}
@@ -76,7 +78,7 @@ namespace ICSharpCode.SharpDevelop.Gui
 		}
 		
 		// The compiler message view properties.
-		Properties 	properties	      = null;
+		Properties properties  = null;
 		
 		public List<MessageViewCategory> MessageCategories {
 			get {
@@ -97,8 +99,10 @@ namespace ICSharpCode.SharpDevelop.Gui
 			AddCategory(TaskService.BuildMessageViewCategory);
 			
 			myPanel.SuspendLayout();
-			textEditorControl.Dock              = DockStyle.Fill;
-			textEditorControl.ShowLineNumbers   = false;
+			textEditorControl.Dock = DockStyle.Fill;
+			textEditorControl.BorderStyle = BorderStyle.FixedSingle;
+			textEditorControl.BackColor = SystemColors.Window;
+			/*textEditorControl.ShowLineNumbers   = false;
 			textEditorControl.ShowInvalidLines  = false;
 			textEditorControl.EnableFolding     = false;
 			textEditorControl.IsIconBarVisible  = false;
@@ -107,18 +111,20 @@ namespace ICSharpCode.SharpDevelop.Gui
 			textEditorControl.ShowVRuler        = false;
 			textEditorControl.ShowSpaces        = false;
 			textEditorControl.ShowTabs          = false;
-			textEditorControl.ShowEOLMarkers    = false;
+			textEditorControl.ShowEOLMarkers    = false;*/
+			textEditorControl.ReadOnly = true;
 			
 			textEditorControl.ContextMenuStrip = MenuService.CreateContextMenu(this, "/SharpDevelop/Pads/CompilerMessageView/ContextMenu");
 			
 			properties = (Properties)PropertyService.Get(OutputWindowOptionsPanel.OutputWindowsProperty, new Properties());
 			
-			textEditorControl.Font     = FontSelectionPanel.ParseFont(properties.Get("DefaultFont", ResourceService.CourierNew10.ToString()).ToString());
+			textEditorControl.Font = FontSelectionPanel.ParseFont(properties.Get("DefaultFont", ResourceService.CourierNew10.ToString()).ToString());
 			properties.PropertyChanged += new PropertyChangedEventHandler(PropertyChanged);
 			
-			textEditorControl.ActiveTextAreaControl.TextArea.DoubleClick += TextEditorControlDoubleClick;
+			//textEditorControl.ActiveTextAreaControl.TextArea.DoubleClick += TextEditorControlDoubleClick;
+			textEditorControl.DoubleClick += TextEditorControlDoubleClick;
 			
-			ToolStrip toolStrip = ToolbarService.CreateToolStrip(this, "/SharpDevelop/Pads/CompilerMessageView/Toolbar");
+			toolStrip = ToolbarService.CreateToolStrip(this, "/SharpDevelop/Pads/CompilerMessageView/Toolbar");
 			toolStrip.Stretch   = true;
 			toolStrip.GripStyle = System.Windows.Forms.ToolStripGripStyle.Hidden;
 			
@@ -131,13 +137,13 @@ namespace ICSharpCode.SharpDevelop.Gui
 		
 		void SetWordWrap()
 		{
-//			bool wordWrap = properties.Get("WordWrap", true);
-//			textEditorControl.WordWrap = wordWrap;
-//			if (wordWrap) {
-//				textEditorControl.ScrollBars = RichTextBoxScrollBars.ForcedBoth;
-//			} else {
-//				textEditorControl.ScrollBars = RichTextBoxScrollBars.ForcedVertical;
-//			}
+			bool wordWrap = this.WordWrap;
+			textEditorControl.WordWrap = wordWrap;
+			if (wordWrap) {
+				textEditorControl.ScrollBars = RichTextBoxScrollBars.ForcedBoth;
+			} else {
+				textEditorControl.ScrollBars = RichTextBoxScrollBars.ForcedVertical;
+			}
 		}
 		
 		public override void RedrawContent()
@@ -167,7 +173,7 @@ namespace ICSharpCode.SharpDevelop.Gui
 		{
 			if (messageCategories[SelectedCategoryIndex] == category) {
 				textEditorControl.Text = String.Empty;
-				textEditorControl.Refresh();
+				//textEditorControl.Refresh();
 			}
 		}
 		
@@ -176,25 +182,67 @@ namespace ICSharpCode.SharpDevelop.Gui
 			WorkbenchSingleton.SafeThreadAsyncCall(this, "SetText", (MessageViewCategory)sender, e.Text);
 		}
 		
+		object appendCallLock = new object();
+		volatile int pendingAppendCalls = 0;
+		
 		void CategoryTextAppended(object sender, TextEventArgs e)
 		{
-			WorkbenchSingleton.SafeThreadAsyncCall(this, "AppendText", (MessageViewCategory)sender, ((MessageViewCategory)sender).Text, e.Text);
+			lock (appendCallLock) {
+				pendingAppendCalls += 1;
+				if (pendingAppendCalls < 5) {
+					WorkbenchSingleton.SafeThreadAsyncCall(this, "AppendText", sender, ((MessageViewCategory)sender).Text, e.Text);
+				} else if (pendingAppendCalls == 5) {
+					WorkbenchSingleton.SafeThreadAsyncCall(this, "AppendTextCombined", sender);
+				}
+			}
+		}
+		
+		const int WM_SETREDRAW = 0x00B;
+		
+		[System.Security.SuppressUnmanagedCodeSecurityAttribute]
+		[System.Runtime.InteropServices.DllImport("user32.dll")]
+		static extern IntPtr SendMessage(IntPtr hWnd, int msg, int wParam, IntPtr lParam);
+		
+		void SetUpdate(bool update)
+		{
+			SendMessage(textEditorControl.Handle, WM_SETREDRAW, update ? 1 : 0, IntPtr.Zero);
+		}
+		
+		void AppendTextCombined(MessageViewCategory category)
+		{
+			Application.DoEvents();
+			Thread.Sleep(50);
+			Application.DoEvents();
+			lock (appendCallLock) {
+				SetUpdate(false);
+				SetText(category, category.Text);
+				SetUpdate(true);
+				textEditorControl.SelectionStart = textEditorControl.TextLength;
+				LoggingService.Debug("Replaced " + pendingAppendCalls + " appends with one set call");
+				pendingAppendCalls = 0;
+			}
 		}
 		
 		void AppendText(MessageViewCategory category, string fullText, string text)
 		{
+			lock (appendCallLock) {
+				if (pendingAppendCalls >= 5) {
+					return;
+				}
+			}
 			if (messageCategories[SelectedCategoryIndex] != category) {
 				SelectCategory(category.Category, fullText);
 				return;
 			}
-			
 			if (text != null) {
 				text = StringParser.Parse(text);
-				textEditorControl.Document.ReadOnly = false;
+				textEditorControl.AppendText(text);
+				textEditorControl.SelectionStart = textEditorControl.TextLength;
+				/*textEditorControl.Document.ReadOnly = false;
 				textEditorControl.Document.Insert(textEditorControl.Document.TextLength, text);
 				textEditorControl.Document.ReadOnly = true;
 				textEditorControl.ActiveTextAreaControl.Caret.Position = new Point(0, textEditorControl.Document.TotalNumberOfLines);
-				textEditorControl.ActiveTextAreaControl.ScrollTo(textEditorControl.Document.TotalNumberOfLines);
+				textEditorControl.ActiveTextAreaControl.ScrollTo(textEditorControl.Document.TotalNumberOfLines);*/
 			}
 		}
 		
@@ -210,7 +258,7 @@ namespace ICSharpCode.SharpDevelop.Gui
 				text = StringParser.Parse(text);
 			}
 			textEditorControl.Text = text;
-			textEditorControl.Refresh();
+			//textEditorControl.Refresh();
 		}
 		
 		public void SelectCategory(string categoryName)
@@ -234,7 +282,7 @@ namespace ICSharpCode.SharpDevelop.Gui
 				if (category.Category == categoryName) {
 					selectedCategory = i;
 					textEditorControl.Text = text;
-					textEditorControl.Refresh();
+					//textEditorControl.Refresh();
 					OnSelectedCategoryIndexChanged(EventArgs.Empty);
 					break;
 				}
@@ -268,10 +316,20 @@ namespace ICSharpCode.SharpDevelop.Gui
 		/// </summary>
 		void TextEditorControlDoubleClick(object sender, EventArgs e)
 		{
+			string fullText = textEditorControl.Text;
 			// Any text?
-			if (textEditorControl.Text.Length > 0) {
-				int line = textEditorControl.ActiveTextAreaControl.Caret.Line;
-				string textLine = TextUtilities.GetLineAsString(textEditorControl.Document, line);
+			if (fullText.Length > 0) {
+				//int line = textEditorControl.ActiveTextAreaControl.Caret.Line;
+				//string textLine = TextUtilities.GetLineAsString(textEditorControl.Document, line);
+				Point clickPos = textEditorControl.PointToClient(Control.MousePosition);
+				int index = textEditorControl.GetCharIndexFromPosition(clickPos);
+				int start = index;
+				// find start of current line
+				while (--start > 0 && fullText[start - 1] != '\n');
+				// find end of current line
+				while (++index < fullText.Length && fullText[index] != '\r');
+				
+				string textLine = fullText.Substring(start, index - start);
 				
 				FileLineReference lineReference = OutputTextLineParser.GetFileLineReference(textLine);
 				if (lineReference != null) {
@@ -288,6 +346,7 @@ namespace ICSharpCode.SharpDevelop.Gui
 		{
 			if (e.Key == "WordWrap") {
 				SetWordWrap();
+				ToolbarService.UpdateToolbar(toolStrip);
 			}
 			if (e.Key == "DefaultFont") {
 				textEditorControl.Font = FontSelectionPanel.ParseFont(properties.Get("DefaultFont", ResourceService.CourierNew10.ToString()).ToString());
@@ -320,7 +379,8 @@ namespace ICSharpCode.SharpDevelop.Gui
 		
 		public bool EnableCopy {
 			get {
-				return textEditorControl.ActiveTextAreaControl.TextArea.ClipboardHandler.EnableCopy;
+				//return textEditorControl.ActiveTextAreaControl.TextArea.ClipboardHandler.EnableCopy;
+				return textEditorControl.SelectionLength > 0;
 			}
 		}
 		
@@ -338,7 +398,8 @@ namespace ICSharpCode.SharpDevelop.Gui
 		
 		public bool EnableSelectAll {
 			get {
-				return textEditorControl.ActiveTextAreaControl.TextArea.ClipboardHandler.EnableSelectAll;
+				//return textEditorControl.ActiveTextAreaControl.TextArea.ClipboardHandler.EnableSelectAll;
+				return textEditorControl.TextLength > 0;
 			}
 		}
 		
@@ -348,7 +409,8 @@ namespace ICSharpCode.SharpDevelop.Gui
 		
 		public void Copy()
 		{
-			textEditorControl.ActiveTextAreaControl.TextArea.ClipboardHandler.Copy(null, null);
+			//textEditorControl.ActiveTextAreaControl.TextArea.ClipboardHandler.Copy(null, null);
+			textEditorControl.Copy();
 		}
 		
 		public void Paste()
@@ -361,9 +423,9 @@ namespace ICSharpCode.SharpDevelop.Gui
 		
 		public void SelectAll()
 		{
-			textEditorControl.ActiveTextAreaControl.TextArea.ClipboardHandler.SelectAll(null, null);
+			//textEditorControl.ActiveTextAreaControl.TextArea.ClipboardHandler.SelectAll(null, null);
+			textEditorControl.SelectAll();
 		}
 		#endregion
-		
 	}
 }

src/Main/Base/Project/Src/Gui/Pads/CompilerMessageView/MessageViewCategory.cs

@@ -20,7 +20,7 @@ using ICSharpCode.Core;
 namespace ICSharpCode.SharpDevelop.Gui
 {
 	/// <summary>
-	/// This class represents a category with its text content used in the 
+	/// This class represents a category with its text content used in the
 	/// output pad (CompilerMessageView).
 	/// </summary>
 	public class MessageViewCategory
@@ -43,7 +43,9 @@ namespace ICSharpCode.SharpDevelop.Gui
 		
 		public string Text {
 			get {
-				return textBuilder.ToString();
+				lock (textBuilder) {
+					return textBuilder.ToString();
+				}
 			}
 		}
 		
@@ -59,24 +61,30 @@ namespace ICSharpCode.SharpDevelop.Gui
 		
 		public void AppendText(string text)
 		{
-			textBuilder.Append(text);
+			lock (textBuilder) {
+				textBuilder.Append(text);
+			}
 			OnTextAppended(new TextEventArgs(text));
 		}
 		
 		public void SetText(string text)
 		{
-			textBuilder.Length = 0;
-			textBuilder.Append(text);
+			lock (textBuilder) {
+				textBuilder.Length = 0;
+				textBuilder.Append(text);
+			}
 			OnTextSet(new TextEventArgs(text));
 		}
 		
 		public void ClearText()
 		{
-			textBuilder.Length = 0;
+			lock (textBuilder) {
+				textBuilder.Length = 0;
+			}
 			OnCleared(EventArgs.Empty);
 		}
 		
-		protected virtual void OnTextAppended(TextEventArgs e) 
+		protected virtual void OnTextAppended(TextEventArgs e)
 		{
 			if (TextAppended != null) {
 				TextAppended(this, e);

src/Main/Base/Project/Src/Gui/Pads/ErrorList/ErrorListPad.cs

@@ -76,15 +76,19 @@ namespace ICSharpCode.SharpDevelop.Gui
 			instance = this;
 			
 			RedrawContent();
-						
+			
 			TaskService.Cleared += new EventHandler(TaskServiceCleared);
 			TaskService.Added   += new TaskEventHandler(TaskServiceAdded);
 			TaskService.Removed += new TaskEventHandler(TaskServiceRemoved);
+			TaskService.InUpdateChanged += delegate {
+				if (!TaskService.InUpdate)
+					InternalShowResults();
+			};
 			
 			ProjectService.EndBuild       += ProjectServiceEndBuild;
 			ProjectService.SolutionLoaded += OnCombineOpen;
 			ProjectService.SolutionClosed += OnCombineClosed;
-						
+			
 			taskView.CreateControl();
 			contentPanel.Controls.Add(taskView);
 			
@@ -125,7 +129,7 @@ namespace ICSharpCode.SharpDevelop.Gui
 			}
 			UpdateToolstripStatus();
 		}
-				
+		
 		public CompilerResults CompilerResults = null;
 		
 		void AddTask(Task task)
@@ -149,25 +153,31 @@ namespace ICSharpCode.SharpDevelop.Gui
 				default:
 					return;
 			}
-		
+			
 			taskView.AddTask(task);
 		}
 		
 		
 		void TaskServiceCleared(object sender, EventArgs e)
 		{
+			if (TaskService.InUpdate)
+				return;
 			taskView.ClearTasks();
 			UpdateToolstripStatus();
 		}
 		
 		void TaskServiceAdded(object sender, TaskEventArgs e)
 		{
+			if (TaskService.InUpdate)
+				return;
 			AddTask(e.Task);
 			UpdateToolstripStatus();
 		}
 		
 		void TaskServiceRemoved(object sender, TaskEventArgs e)
 		{
+			if (TaskService.InUpdate)
+				return;
 			taskView.RemoveTask(e.Task);
 			UpdateToolstripStatus();
 		}

src/Main/Base/Project/Src/Gui/Pads/TaskList/TaskView.cs

@@ -5,7 +5,7 @@
 //     <version>$Revision$</version>
 // </file>
 
-// much of TaskView's code has been refactored from 
+// much of TaskView's code has been refactored from
 //  TaskList.cs (formerly OpenTaskView.cs) & ErrorList.cs
 
 using System;
@@ -120,7 +120,7 @@ namespace ICSharpCode.Core
 		}
 		
 		protected override void OnColumnClick(ColumnClickEventArgs e)
-		{	
+		{
 			SortBy(e.Column);
 			base.OnColumnClick(e);
 		}
@@ -130,7 +130,7 @@ namespace ICSharpCode.Core
 				System.Diagnostics.Debug.Assert(SelectedTask != null);
 				SelectedTask.JumpToPosition();
 			}
-			base.OnItemActivate(e);		
+			base.OnItemActivate(e);
 		}
 
 		ListViewItem currentListViewItem = null;
@@ -199,7 +199,7 @@ namespace ICSharpCode.Core
 			int right = this.Items.Count - 1;
 			while (left <= right) {
 				int m = left + (right - left) / 2;
-				if (this.ListViewItemSorter.Compare(item, this.Items[m]) > 0) {
+				if (this.mySorter.Compare(item, this.Items[m]) > 0) {
 					left = m + 1;
 				} else {
 					right = m - 1;
@@ -228,7 +228,7 @@ namespace ICSharpCode.Core
 					Items.RemoveAt(i);
 					break;
 				}
-			}			
+			}
 		}
 		
 		public void UpdateResults(System.Collections.Generic.IEnumerable<ICSharpCode.Core.Task> taskSet)
@@ -242,7 +242,6 @@ namespace ICSharpCode.Core
 			
 			this.EndUpdate();
 		}
-					
 		#endregion
 		
 		#region Custom IComparer for sorting TaskView.
@@ -251,8 +250,8 @@ namespace ICSharpCode.Core
 		SortOrder currentSortOrder = SortOrder.Ascending;
 		
 		/// <summary>
-		/// Applies the specified sort request by creating, 
-		/// configuring, and installing a 
+		/// Applies the specified sort request by creating,
+		/// configuring, and installing a
 		/// <see cref="TaskViewSorter"/>.
 		/// </summary>
 		private void SortBy(TaskViewCols col)
@@ -273,10 +272,13 @@ namespace ICSharpCode.Core
 				currentSortOrder = SortOrder.Ascending;
 			}
 			
-			this.ListViewItemSorter = 
-				new TaskViewSorter(currentSortColumn, currentSortOrder);
+			this.mySorter = new TaskViewSorter(currentSortColumn, currentSortOrder);
+			this.ListViewItemSorter = mySorter;
+			this.ListViewItemSorter = null;
 		}
 		
+		TaskViewSorter mySorter;
+		
 		/// <summary>
 		/// Custom <see cref="IComparer"/> for TaskView.
 		/// </summary>
@@ -290,7 +292,7 @@ namespace ICSharpCode.Core
 				sortCol = col;
 				sortOrder = order;
 			}
-						
+			
 			protected int CompareLineNumbers(ListViewItem a, ListViewItem b)
 			{
 				return ((Task)a.Tag).Line.CompareTo(((Task)b.Tag).Line);
@@ -315,8 +317,8 @@ namespace ICSharpCode.Core
 			/// A signed integer indicating the relative sort ranking
 			/// of item <paramref name="x"/> relative to item
 			/// <paramref name="y"/>.
-			/// Return value greater than zero: x > y.  
-			/// Return value is zero: x == y.  
+			/// Return value greater than zero: x > y.
+			/// Return value is zero: x == y.
 			/// Return value is less than zero: x \< y.
 			/// </returns>
 			public int Compare(object x, object y) {

src/Main/Base/Project/Src/Services/Tasks/TaskService.cs

@@ -228,6 +228,24 @@ namespace ICSharpCode.Core
 		public static event TaskEventHandler Added;
 		public static event TaskEventHandler Removed;
 		public static event EventHandler     Cleared;
+		
+		static bool inUpdate;
+		
+		public static bool InUpdate {
+			get {
+				return inUpdate;
+			}
+			set {
+				if (inUpdate != value) {
+					inUpdate = value;
+					
+					if (InUpdateChanged != null) {
+						InUpdateChanged(null, EventArgs.Empty);
+					}
+				}
+			}
+		}
+		
+		public static event EventHandler InUpdateChanged;
 	}
-
 }