First implementation of GUI for editor context actions.

A WPF Popup is shown over the editor when some actions are available. Can be opened by mouse click (TODO open by shortcut).
A Popup is probably not the best solution: it is not "tied" to current editor line anyhow so it stays open when region is collapsed, active ViewContent changes etc. (for active ViewContent change I added explicit handling). It should be probably part of editor's visual tree, in a special layer. Alternatively it could be displayed in the bookmark margin, but that would make it too small. This way it resembles ReSharper.
Have to consult this with Daniel.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@6290 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

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

@@ -8,8 +8,10 @@ using System;
 using System.Collections.ObjectModel;
 using System.Linq;
 using System.Windows.Threading;
+using ICSharpCode.SharpDevelop;
 using ICSharpCode.SharpDevelop.Editor;
 using ICSharpCode.SharpDevelop.Editor.AvalonEdit;
+using ICSharpCode.SharpDevelop.Gui;
 using ICSharpCode.SharpDevelop.Refactoring;
 
 namespace ICSharpCode.AvalonEdit.AddIn
@@ -44,11 +46,34 @@ 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;
+		}
+
+		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)
+					CaretPositionChanged(this, EventArgs.Empty);
+			} catch {}
 		}
 
 		void ScrollChanged(object sender, EventArgs e)
 		{
-			this.popup.Close();
+			ClosePopup();
 		}
 
 		void TimerMoveTick(object sender, EventArgs e)
@@ -62,7 +87,8 @@ namespace ICSharpCode.AvalonEdit.AddIn
 				return;
 			
 			this.popup.Actions = new ContextActionsViewModel {
-				Title = "A",
+				Title = "#",
+				//Image = ClassBrowserIconService.Class.ImageSource,
 				Actions = availableActionsVM
 			};
 			this.popup.OpenAtLineStart(this.Editor);
@@ -72,11 +98,17 @@ namespace ICSharpCode.AvalonEdit.AddIn
 		{
 			if (this.popup.IsOpen)
 			{
-				this.popup.Close();
+				ClosePopup();
-				this.popup.Actions = null;
 			}
 			this.delayMoveTimer.Stop();
 			this.delayMoveTimer.Start();
 		}
+		
+		void ClosePopup()
+		{
+			this.popup.Close();
+			this.popup.IsDropdownOpen = false;
+			this.popup.Actions = null;
+		}
 	}
 }

src/AddIns/Misc/SharpRefactoring/Project/Src/GenerateCode.cs

@@ -330,4 +330,4 @@ namespace SharpRefactoring
 		}
 	}
 	#endregion
-}
+}

src/Main/Base/Project/Src/Services/RefactoringService/ContextActions/ContextActionsHeaderedControl.xaml

@@ -18,8 +18,8 @@
 		</Grid.ColumnDefinitions>
 		
 		<!-- Header -->
-		<Border Grid.Row="0" Grid.Column="0" Padding="4" BorderThickness="1 1 1 0" 
+		<Border x:Name="Header" Grid.Row="0" Grid.Column="0" Padding="4" BorderThickness="1" 
-		        BorderBrush="{StaticResource OuterBorderBrush}" HorizontalAlignment="Left">
+		        BorderBrush="{StaticResource OuterBorderBrush}" HorizontalAlignment="Left" MouseUp="Header_MouseUp">
 			<Border.Background>
 				<LinearGradientBrush StartPoint="0,0" EndPoint="0,1">
 					<GradientStop Color="#D6E9FF" Offset="0"/>

src/Main/Base/Project/Src/Services/RefactoringService/ContextActions/ContextActionsHeaderedControl.xaml.cs

@@ -24,6 +24,31 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 		public ContextActionsHeaderedControl()
 		{
 			InitializeComponent();
+			this.IsAlwaysOpen = false;
+			this.IsOpen = false;
+		}
+		
+		bool isAlwaysOpen;
+		public bool IsAlwaysOpen {
+			get { return isAlwaysOpen; }
+			set { 
+				isAlwaysOpen = value; 
+				if (value)
+					IsOpen = true;
+			}
+		}
+		
+		bool isOpen;
+		public bool IsOpen {
+			get { return isOpen; }
+			set { 
+				if (IsAlwaysOpen && !value)
+					throw new InvalidOperationException("Cannot set IsOpen to false when IsAlwaysOpen is true");
+				isOpen = value;
+				this.Header.Opacity = isOpen ? 1.0 : 0.5;
+				this.Header.BorderThickness = isOpen ? new Thickness(1, 1, 1, 0) : new Thickness(1);
+				this.ActionsTreeView.Visibility = isOpen ? Visibility.Visible : Visibility.Collapsed;
+			}
 		}
 		
 		public event EventHandler ActionExecuted
@@ -37,5 +62,13 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 			if (this.ActionsTreeView != null)
 				this.ActionsTreeView.Focus();
 		}
+		
+		void Header_MouseUp(object sender, MouseButtonEventArgs e)
+		{
+			if (!this.IsAlwaysOpen)
+			{
+				this.IsOpen = !this.IsOpen;
+			}
+		}
 	}
 }

src/Main/Base/Project/Src/Services/RefactoringService/ContextActions/ContextActionsPopup.cs

@@ -35,6 +35,9 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 				Close();
 		}
 		
+		public bool IsDropdownOpen { get { return ActionsControl.IsOpen; } set {ActionsControl.IsOpen = value; } }
+		public bool IsDropdownAlwaysOpen { get { return ActionsControl.IsAlwaysOpen; } set {ActionsControl.IsAlwaysOpen = value; } }
+		
 		ContextActionsHeaderedControl ActionsControl
 		{
 			get { return (ContextActionsHeaderedControl)this.Child; }
@@ -73,6 +76,7 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 		public void OpenAtLineStart(ITextEditor editor)
 		{
 			OpenAtPosition(editor, editor.Caret.Line, 1, false);
+			this.VerticalOffset -= 16;
 		}
 		
 		void OpenAtPosition(ITextEditor editor, int line, int column, bool openAtWordStart)

src/Main/Base/Project/Src/Services/RefactoringService/ContextActions/ContextActionsService.cs

@@ -39,7 +39,6 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 		/// </summary>
 		public IEnumerable<IContextAction> GetAvailableActions(ITextEditor editor)
 		{
-			yield break;
 			var editorContext = new EditorContext(editor);
 			// could run providers in parallel
 			foreach (var provider in this.providers) {

src/Main/Base/Project/Src/Services/RefactoringService/ContextActionsHelper.cs

@@ -27,7 +27,7 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 			var popupViewModel = new ContextActionsViewModel { Title = MenuService.ConvertLabel(StringParser.Parse(
 				"${res:SharpDevelop.Refactoring.ClassesDerivingFrom}", new StringTagPair("Name", baseClass.Name)))};
 			popupViewModel.Actions = new PopupTreeViewModelBuilder().BuildTreeViewModel(derivedClassesTree);
-			return new ContextActionsPopup { Actions = popupViewModel };
+			return new ContextActionsPopup { Actions = popupViewModel, IsDropdownAlwaysOpen = true };
 		}
 		
 		public static ContextActionsPopup MakePopupWithBaseClasses(IClass @class)
@@ -40,7 +40,7 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 			var popupViewModel = new ContextActionsViewModel { Title = MenuService.ConvertLabel(StringParser.Parse(
 				"${res:SharpDevelop.Refactoring.BaseClassesOf}", new StringTagPair("Name", @class.Name)))};
 			popupViewModel.Actions = new PopupListViewModelBuilder().BuildListViewModel(baseClassList);
-			return new ContextActionsPopup { Actions = popupViewModel };
+			return new ContextActionsPopup { Actions = popupViewModel, IsDropdownAlwaysOpen = true };
 		}
 		
 		public static ContextActionsPopup MakePopupWithOverrides(IMember member)
@@ -49,7 +49,7 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 			var popupViewModel = new ContextActionsViewModel { Title = MenuService.ConvertLabel(StringParser.Parse(
 				"${res:SharpDevelop.Refactoring.OverridesOf}", new string[,] {{ "Name", member.FullyQualifiedName }}))};
 			popupViewModel.Actions = new OverridesPopupTreeViewModelBuilder(member).BuildTreeViewModel(derivedClassesTree);
-			return new ContextActionsPopup { Actions = popupViewModel };
+			return new ContextActionsPopup { Actions = popupViewModel, IsDropdownAlwaysOpen = true };
 		}
 		
 		class PopupViewModelBuilder