Add C# context actions to AddInTree.

src/AddIns/BackendBindings/CSharpBinding/Project/CSharpBinding.addin

@@ -9,8 +9,11 @@
 	</Manifest>
 	
 	<Runtime>
-		<Import assembly = "CSharpBinding.dll"/>
+		<Import assembly = "CSharpBinding.dll">
+			<Doozer name="CSharpContextAction" class="CSharpBinding.CSharpContextActionDoozer"/>
+		</Import>
 		<Import assembly = ":ICSharpCode.SharpDevelop"/>
+		<Import assembly = ":ICSharpCode.NRefactory.CSharp"/>
 	</Runtime>
 	
 	<Path name = "/SharpDevelop/Workbench/Ambiences">
@@ -94,14 +97,6 @@
 		<Include id = "AllManaged" path="/SharpDevelop/BackendBindings/ProjectOptions/AllManaged"/>
 	</Path>
 	
-	<!--
-	depreciated, use LanguageBinding instead
-
-	<Path name = "/AddIns/DefaultTextEditor/Formatter/C#">
-		<Class id ="CSharpFormatter" class = "CSharpBinding.FormattingStrategy.CSharpFormattingStrategy"/>
-	</Path>
-	-->
-	
 	<Path name = "/Workspace/Icons">
 		<!-- C# -->
 		<Icon id         = "C#Prj"
@@ -120,6 +115,83 @@
 		                projectfileextension = ".csproj"
 		                class                = "CSharpBinding.CSharpProjectBinding" />
 	</Path>
-</AddIn>
-
 	
+	<Path path = "/SharpDevelop/ViewContent/AvalonEdit/ContextActions">
+		<!-- TODO: translate -->
+		<CSharpContextAction id = "AddAnotherAccessor"
+			displayName = "Add another accessor"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.AddAnotherAccessor" />
+		<CSharpContextAction id = "CheckIfParameterIsNull"
+			displayName = "${res:AddIns.SharpRefactoring.InsertCtor.AddCheckForNullLabel}"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.CheckIfParameterIsNull" />
+		<CSharpContextAction id = "ConvertDecToHex"
+			displayName = "Convert to hexadecimal"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.ConvertDecToHex" />
+		<CSharpContextAction id = "ConvertHexToDec"
+			displayName = "Convert to decimal"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.ConvertHexToDec" />
+		<CSharpContextAction id = "ConvertForeachToFor"
+			displayName = "Convert to for loop"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.ConvertForeachToFor" />
+		<CSharpContextAction id = "CreateBackingStore"
+			displayName = "${res:SharpDevelop.Refactoring.ExpandAutomaticProperty}"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.CreateBackingStore" />
+		<CSharpContextAction id = "CreateEventInvocator"
+			displayName = "${res:SharpDevelop.Refactoring.CreateOnEventMethod}"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.CreateEventInvocator" />
+		<CSharpContextAction id = "CreateField"
+			displayName = "Introduce field"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.CreateField" />
+		<CSharpContextAction id = "CreateLocalVariable"
+			displayName = "Introduce local variable"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.CreateLocalVariable" />
+		<CSharpContextAction id = "CreateProperty"
+			displayName = "Create property"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.CreateProperty" />
+		<CSharpContextAction id = "FlipOperatorArguments"
+			displayName = "Flip operands"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.FlipOperatorArguments" />
+		<CSharpContextAction id = "GenerateGetter"
+			displayName = "Generate getter"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.GenerateGetter" />
+		<!--<CSharpContextAction id = "GenerateProperty"
+			displayName = "Generate property"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.GenerateProperty" />
+		<CSharpContextAction id = "GenerateSwitchLabels"
+			displayName = "Generate switch labels"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.GenerateSwitchLabels" />
+		<CSharpContextAction id = "InsertAnonymousMethodSignature"
+			displayName = "Create anonymous method"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.InsertAnonymousMethodSignature" />
+		<CSharpContextAction id = "IntroduceFormatItem"
+			displayName = "Introduce string.Format call"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.IntroduceFormatItem" />
+		<CSharpContextAction id = "InvertIf"
+			displayName = "Invert if"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.InvertIf" />
+		<CSharpContextAction id = "RemoveBackingStore"
+			displayName = "${res:SharpDevelop.Refactoring.ConvertToAutomaticProperty}"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.RemoveBackingStore" />
+		<CSharpContextAction id = "RemoveBraces"
+			displayName = "Remove braces"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.RemoveBraces" />
+		<CSharpContextAction id = "RemoveRegion"
+			displayName = "Remove #region"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.RemoveRegion" />
+		<CSharpContextAction id = "ReplaceEmptyString"
+			displayName = "Use string.Empty"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.ReplaceEmptyString" />
+		<CSharpContextAction id = "SplitDeclarationAndAssignment"
+			displayName = "Split declaration and assignment"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.SplitDeclarationAndAssignment" />
+		<CSharpContextAction id = "SplitString"
+			displayName = "Split string literal"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.SplitString" />
+		<CSharpContextAction id = "UseExplicitType"
+			displayName = "Use explicit type"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.UseExplicitType" />
+		<CSharpContextAction id = "UseVarKeyword"
+			displayName = "Use 'var' keyword"
+			class       = "ICSharpCode.NRefactory.CSharp.Refactoring.UseVarKeyword" />-->
+	</Path>
+</AddIn>

src/AddIns/BackendBindings/CSharpBinding/Project/CSharpBinding.csproj

@@ -74,9 +74,11 @@
     <Compile Include="Src\Completion\CSharpCompletionDataFactory.cs" />
     <Compile Include="Src\Completion\EntityCompletionData.cs" />
     <Compile Include="Src\CSharpBracketSearcher.cs" />
+    <Compile Include="Src\CSharpContextActionDoozer.cs" />
     <Compile Include="Src\CSharpLanguageBinding.cs" />
     <Compile Include="Src\CSharpProjectBinding.cs" />
     <Compile Include="Src\CSharpSemanticHighlighter.cs" />
+    <Compile Include="Src\ExtensionMethods.cs" />
     <Compile Include="Src\FormattingStrategy\CSharpFormattingStrategy.cs" />
     <Compile Include="Src\FormattingStrategy\DocumentAccessor.cs" />
     <Compile Include="Src\OptionPanels\BuildOptions.cs">

src/AddIns/BackendBindings/CSharpBinding/Project/Src/CSharpContextActionDoozer.cs

@@ -0,0 +1,84 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
+using CSharpBinding.Parser;
+using ICSharpCode.Core;
+using ICSharpCode.NRefactory.CSharp.Resolver;
+using ICSharpCode.SharpDevelop.Refactoring;
+
+namespace CSharpBinding
+{
+	using NR5ContextAction = ICSharpCode.NRefactory.CSharp.Refactoring.IContextAction;
+	
+	/// <summary>
+	/// Doozer for C# context actions.
+	/// Expects a 'class' referencing an NR5 context action and provides an SD IContextActionsProvider.
+	/// </summary>
+	public class CSharpContextActionDoozer : IDoozer
+	{
+		public bool HandleConditions {
+			get { return false; }
+		}
+		
+		public object BuildItem(BuildItemArgs args)
+		{
+			return new CSharpContextActionWrapper(args.AddIn, args.Codon.Properties);
+		}
+		
+		sealed class CSharpContextActionWrapper : ContextAction
+		{
+			readonly AddIn addIn;
+			readonly string className;
+			readonly string displayName;
+			
+			public CSharpContextActionWrapper(AddIn addIn, Properties properties)
+			{
+				this.addIn = addIn;
+				this.className = properties["class"];
+				this.displayName = properties["displayName"];
+			}
+			
+			bool contextActionCreated;
+			NR5ContextAction contextAction;
+			
+			public override string ID {
+				get { return className; }
+			}
+			
+			public override string DisplayName {
+				get { return StringParser.Parse(displayName); }
+			}
+			
+			public override Task<bool> IsAvailableAsync(EditorContext context, CancellationToken cancellationToken)
+			{
+				if (!string.Equals(Path.GetExtension(context.FileName), ".cs", StringComparison.OrdinalIgnoreCase))
+					return Task.FromResult(false);
+				return Task.Run(
+					async delegate {
+						var parseInfo = (await context.GetParseInformationAsync().ConfigureAwait(false)) as CSharpFullParseInformation;
+						if (parseInfo == null)
+							return false;
+						lock (this) {
+							if (!contextActionCreated) {
+								contextActionCreated = true;
+								contextAction = (NR5ContextAction)addIn.CreateObject(className);
+							}
+						}
+						if (contextAction == null)
+							return false;
+						CSharpAstResolver resolver = await context.GetAstResolverAsync().ConfigureAwait(false);
+						return true;
+					}, cancellationToken);
+			}
+			
+			public override void Execute(EditorContext context)
+			{
+				throw new NotImplementedException();
+			}
+		}
+	}
+}

src/AddIns/BackendBindings/CSharpBinding/Project/Src/ExtensionMethods.cs

@@ -0,0 +1,41 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+using System.Threading.Tasks;
+using CSharpBinding.Parser;
+using ICSharpCode.NRefactory.CSharp;
+using ICSharpCode.NRefactory.CSharp.Resolver;
+using ICSharpCode.NRefactory.CSharp.TypeSystem;
+using ICSharpCode.SharpDevelop.Refactoring;
+
+namespace CSharpBinding
+{
+	/// <summary>
+	/// C#-specific extension methods.
+	/// </summary>
+	public static class ExtensionMethods
+	{
+		public static async Task<CompilationUnit> GetCompilationUnitAsync(this EditorContext editorContext)
+		{
+			var parseInfo = (await editorContext.GetParseInformationAsync().ConfigureAwait(false)) as CSharpFullParseInformation;
+			if (parseInfo != null)
+				return parseInfo.CompilationUnit;
+			else
+				return new CompilationUnit();
+		}
+		
+		public static Task<CSharpAstResolver> GetAstResolverAsync(this EditorContext editorContext)
+		{
+			return editorContext.GetCachedAsync(
+				async ec => {
+					var parseInfo = (await ec.GetParseInformationAsync().ConfigureAwait(false)) as CSharpFullParseInformation;
+					var compilation = await ec.GetCompilationAsync().ConfigureAwait(false);
+					if (parseInfo != null)
+						return new CSharpAstResolver(compilation, parseInfo.CompilationUnit, parseInfo.ParsedFile);
+					else
+						return new CSharpAstResolver(compilation, new CompilationUnit(), new CSharpParsedFile(ec.FileName));
+				});
+		}
+	}
+}

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

@@ -421,12 +421,10 @@
     <Compile Include="Src\Services\RefactoringService\ContextActions\ContextActionsPopup.cs" />
     <Compile Include="Src\Services\RefactoringService\ContextActions\ContextActionsViewModel.cs" />
     <Compile Include="Src\Services\RefactoringService\ContextActions\ContextActionViewModel.cs" />
-    <Compile Include="Src\Services\RefactoringService\ContextActions\IContextActionCache.cs" />
     <Compile Include="Src\Services\RefactoringService\ContextActions\IContextActionsProvider.cs" />
     <Compile Include="Src\Services\RefactoringService\ExtractInterfaceOptions.cs" />
     <Compile Include="Src\Services\RefactoringService\FindReferenceService.cs" />
-    <Compile Include="Src\Services\RefactoringService\GoToClassAction.cs" />
-    <Compile Include="Src\Services\RefactoringService\GoToMemberAction.cs" />
+    <Compile Include="Src\Services\RefactoringService\GoToEntityAction.cs" />
     <Compile Include="Src\Services\RefactoringService\TypeGraphNode.cs" />
     <Compile Include="Src\Services\RefactoringService\TypeName.cs" />
     <Compile Include="Src\Services\Tasks\ErrorPainter.cs" />

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

@@ -16,16 +16,25 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 	/// </summary>
 	public abstract class ContextAction : IContextActionsProvider, IContextAction
 	{
-		public abstract string Title { get; }
+		public virtual string ID {
+			get { return GetType().FullName; }
+		}
+		
+		public abstract string DisplayName { get; }
 		
 		public bool IsVisible { get; set; }
 		
+		/// <summary>
+		/// Gets whether this context action is available in the given context.
+		/// </summary>
+		/// <remarks><inheritdoc cref="IContextActionsProvider.GetAvailableActionsAsync"/></remarks>
 		public abstract Task<bool> IsAvailableAsync(EditorContext context, CancellationToken cancellationToken);
 		
 		public abstract void Execute(EditorContext context);
 		
 		async Task<IContextAction[]> IContextActionsProvider.GetAvailableActionsAsync(EditorContext context, CancellationToken cancellationToken)
 		{
+			cancellationToken.ThrowIfCancellationRequested();
 			if (await IsAvailableAsync(context, cancellationToken).ConfigureAwait(false))
 				return new IContextAction[] { this };
 			else

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

@@ -32,7 +32,7 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 		}
 		
 		public string Name {
-			get { return this.action != null ? this.action.Title : string.Empty; }
+			get { return this.action != null ? this.action.DisplayName : string.Empty; }
 		}
 		
 		public string Comment { get; set; }

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

@@ -4,6 +4,7 @@
 using System;
 using System.Collections.Generic;
 using System.Text;
+using System.Threading;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Data;
@@ -30,14 +31,6 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 			remove { this.ActionsTreeView.ActionExecuted -= value; }
 		}
 		
-		/*
-		public new ContextActionsBulbViewModel DataContext
-		{
-			get { return (ContextActionsBulbViewModel)base.DataContext; }
-			set { base.DataContext = value; }
-		}
-		*/
-		
 		bool isOpen;
 		public bool IsOpen {
 			get { return isOpen; }
@@ -70,9 +63,7 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 		
 		void Expander_Expanded(object sender, RoutedEventArgs e)
 		{
-			throw new NotImplementedException();
-			#warning NotImplementedException
-			//this.DataContext.LoadHiddenActions();
+			((ContextActionsBulbViewModel)this.DataContext).LoadHiddenActionsAsync(CancellationToken.None).FireAndForget();
 		}
 		
 		void CheckBox_Click(object sender, RoutedEventArgs e)

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

@@ -61,7 +61,7 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 			protected ContextActionViewModel MakeGoToClassAction(ITypeDefinition @class, ObservableCollection<ContextActionViewModel> childActions)
 			{
 				return new ContextActionViewModel {
-					Action = new GoToClassAction(@class, this.LabelAmbience.ConvertEntity(@class)),
+					Action = new GoToEntityAction(@class, this.LabelAmbience),
 					Image = CompletionImage.GetImage(@class),
 					Comment = string.Format("(in {0})", @class.Namespace),
 					ChildActions = childActions
@@ -106,7 +106,7 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 					return null;
 				
 				return new ContextActionViewModel {
-					Action = new GoToMemberAction(derivedMember, this.LabelAmbience),
+					Action = new GoToEntityAction(derivedMember, this.LabelAmbience),
 					Image = CompletionImage.GetImage(derivedMember),
 					Comment = string.Format("(in {0})", containingClass.FullName),
 					ChildActions = childActions

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

@@ -22,8 +22,6 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 	{
 		static readonly ContextActionsService instance = new ContextActionsService();
 		
-		static ContextActionsService() {}
-		
 		/// <summary>
 		/// Key for storing the names of disabled providers in PropertyService.
 		/// </summary>
@@ -33,20 +31,19 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 			get { return instance; }
 		}
 		
-		List<IContextActionsProvider> providers;
-		
 		private ContextActionsService()
 		{
-			this.providers = AddInTree.BuildItems<IContextActionsProvider>("/SharpDevelop/ViewContent/AvalonEdit/ContextActions", null, false);
-			var disabledActions = LoadProviderVisibilities().ToLookup(s => s);
-			foreach (var provider in providers) {
-				provider.IsVisible = !disabledActions.Contains(provider.GetType().FullName);
-			}
 		}
 		
 		public EditorActionsProvider CreateActionsProvider(ITextEditor editor)
 		{
-			return new EditorActionsProvider(editor, this.providers);
+			var editorContext = new EditorContext(editor);
+			var providers = AddInTree.BuildItems<IContextActionsProvider>("/SharpDevelop/ViewContent/AvalonEdit/ContextActions", editorContext, false);
+			var disabledActions = new HashSet<string>(LoadProviderVisibilities());
+			foreach (var provider in providers) {
+				provider.IsVisible = !disabledActions.Contains(provider.ID);
+			}
+			return new EditorActionsProvider(editorContext, providers);
 		}
 		
 		static List<string> LoadProviderVisibilities()
@@ -54,9 +51,9 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 			return PropertyService.Get(PropertyServiceKey, new List<string>());
 		}
 		
-		public void SaveProviderVisibilities()
+		public void SaveProviderVisibilities(IEnumerable<IContextActionsProvider> providers)
 		{
-			List<string> disabledProviders = this.providers.Where(p => !p.IsVisible).Select(p => p.GetType().FullName).ToList();
+			List<string> disabledProviders = providers.Where(p => !p.IsVisible).Select(p => p.ID).ToList();
 			PropertyService.Set(PropertyServiceKey, disabledProviders);
 		}
 	}
@@ -67,17 +64,20 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 	public class EditorActionsProvider
 	{
 		readonly IList<IContextActionsProvider> providers;
-		public EditorContext EditorContext { get; set; }
+		readonly EditorContext editorContext;
+		
+		public EditorContext EditorContext {
+			get { return editorContext; }
+		}
 		
-		public EditorActionsProvider(ITextEditor editor, IList<IContextActionsProvider> providers)
+		public EditorActionsProvider(EditorContext editorContext, IList<IContextActionsProvider> providers)
 		{
-			if (editor == null)
-				throw new ArgumentNullException("editor");
+			if (editorContext == null)
+				throw new ArgumentNullException("editorContext");
 			if (providers == null)
 				throw new ArgumentNullException("providers");
 			this.providers = providers;
-			
-			this.EditorContext = new EditorContext(editor);
+			this.editorContext = editorContext;
 		}
 		
 		public Task<IEnumerable<IContextAction>> GetVisibleActionsAsync(CancellationToken cancellationToken)
@@ -96,7 +96,7 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 			if (providerForAction.TryGetValue(action, out provider)) {
 				provider.IsVisible = isVisible;
 			}
-			ContextActionsService.Instance.SaveProviderVisibilities();
+			ContextActionsService.Instance.SaveProviderVisibilities(providers);
 		}
 		
 		/// <summary>
@@ -114,11 +114,13 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 			var providerList = providers.ToList();
 			var actions = await Task.WhenAll(providerList.Select(p => p.GetAvailableActionsAsync(this.EditorContext, cancellationToken)));
 			for (int i = 0; i < actions.Length; i++) {
+				if (actions[i] != null) {
 					foreach (var action in actions[i]) {
 						providerForAction[action] = providerList[i];
 					}
 				}
-			return actions.SelectMany(_ => _);
+			}
+			return actions.Where(a => a != null).SelectMany(a => a);
 		}
 	}
 }

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

@@ -2,6 +2,7 @@
 // This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
 
 using System;
+using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Linq;
@@ -25,7 +26,7 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 	/// </summary>
 	public class EditorContext
 	{
-		object syncRoot;
+		readonly object syncRoot = new object();
 		readonly ITextEditor editor;
 		
 		/// <summary>
@@ -49,6 +50,7 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 		public ITextSource TextSource { get; private set; }
 		
 		readonly int caretOffset;
+		readonly TextLocation caretLocation;
 		
 		/// <summary>
 		/// Gets the offset of the caret, at the time when this editor context was created.
@@ -58,7 +60,7 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 		}
 		
 		Task<ParseInformation> parseInformation;
-		ICompilation compilation;
+		Task<ICompilation> compilation;
 		
 		/// <summary>
 		/// Gets the ParseInformation for the file.
@@ -78,14 +80,17 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 		/// </summary>
 		public Task<ICompilation> GetCompilationAsync()
 		{
-			var c = LazyInitializer.EnsureInitialized(ref compilation, () => ParserService.GetCompilationForFile(this.FileName));
-			return Task.FromResult(c);
+			lock (syncRoot) {
+				if (compilation == null)
+					compilation = Task.FromResult(ParserService.GetCompilationForFile(this.FileName));
+				return compilation;
+			}
 		}
 		
 		/// <summary>
 		/// Caches values shared by Context actions. Used in <see cref="GetCached"/>.
 		/// </summary>
-		readonly Dictionary<Type, object> cachedValues = new Dictionary<Type, object>();
+		readonly ConcurrentDictionary<Type, Task> cachedValues = new ConcurrentDictionary<Type, Task>();
 		
 		/// <summary>
 		/// Fully initializes the EditorContext.
@@ -96,36 +101,52 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 				throw new ArgumentNullException("editor");
 			this.editor = editor;
 			caretOffset = editor.Caret.Offset;
+			caretLocation = editor.Caret.Location;
 			
 			this.FileName = editor.FileName;
 			this.TextSource = editor.Document.CreateSnapshot();
 		}
 		
+		Task<ResolveResult> currentSymbol;
+		
 		/// <summary>
 		/// The resolved symbol at editor caret.
 		/// </summary>
-		public ResolveResult CurrentSymbol {
-			get {
-				throw new NotImplementedException();
+		public Task<ResolveResult> GetCurrentSymbolAsync()
+		{
+			lock (syncRoot) {
+				if (currentSymbol == null)
+					currentSymbol = ResolveCurrentSymbolAsync();
+				return currentSymbol;
 			}
 		}
 		
+		async Task<ResolveResult> ResolveCurrentSymbolAsync()
+		{
+			var parser = ParserService.GetParser(this.FileName);
+			if (parser == null)
+				return null;
+			var parseInfo = await GetParseInformationAsync().ConfigureAwait(false);
+			if (parseInfo == null)
+				return null;
+			var compilation = await GetCompilationAsync().ConfigureAwait(false);
+			return await Task.Run(() => ParserService.ResolveAsync(this.FileName, caretLocation, this.TextSource, CancellationToken.None)).ConfigureAwait(false);
+		}
+		
 		/// <summary>
 		/// Gets cached value shared by context actions. Initializes a new value if not present.
 		/// </summary>
-		public T GetCached<T>() where T : IContextActionCache, new()
+		public Task<T> GetCachedAsync<T>(Func<EditorContext, T> initializationFunc)
 		{
-			lock (cachedValues) {
-				Type t = typeof(T);
-				if (cachedValues.ContainsKey(t)) {
-					return (T)cachedValues[t];
-				} else {
-					T cached = new T();
-					cached.Initialize(this);
-					cachedValues[t] = cached;
-					return cached;
-				}
+			return (Task<T>)cachedValues.GetOrAdd(typeof(T), _ => Task.FromResult(initializationFunc(this)));
 		}
+		
+		/// <summary>
+		/// Gets cached value shared by context actions. Initializes a new value if not present.
+		/// </summary>
+		public Task<T> GetCachedAsync<T>(Func<EditorContext, Task<T>> initializationFunc)
+		{
+			return (Task<T>)cachedValues.GetOrAdd(typeof(T), _ => initializationFunc(this));
 		}
 	}
 }

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

@@ -12,9 +12,9 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 	public interface IContextAction
 	{
 		/// <summary>
-		/// Title displayed in the context actions popup.
+		/// Name displayed in the context actions popup.
 		/// </summary>
-		string Title { get; }
+		string DisplayName { get; }
 		/// <summary>
 		/// Executes this action. Called when this action is selected from the context actions popup.
 		/// </summary>

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

@@ -1,15 +0,0 @@
-// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
-// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
-
-using System;
-
-namespace ICSharpCode.SharpDevelop.Refactoring
-{
-	/// <summary>
-	/// Temporary data shared by multiple Context actions. Stored in EditorContext.GetCached().
-	/// </summary>
-	public interface IContextActionCache
-	{
-		void Initialize(EditorContext context);
-	}
-}

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

@@ -13,9 +13,19 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 	/// </summary>
 	public interface IContextActionsProvider
 	{
+		/// <summary>
+		/// Unique identifier for the context actions provider; used to hide context actions
+		/// that were disabled by the user.
+		/// </summary>
+		string ID { get; }
+		
 		/// <summary>
 		/// Gets actions available for current line of the editor.
 		/// </summary>
+		/// <remarks>
+		/// This method gets called on the GUI thread. The method implementation should use
+		/// 'Task.Run()' to move the implementation onto a background thread.
+		/// </remarks>
 		Task<IContextAction[]> GetAvailableActionsAsync(EditorContext context, CancellationToken cancellationToken);
 		
 		/// <summary>

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

@@ -1,29 +0,0 @@
-// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
-// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
-
-using System;
-using ICSharpCode.NRefactory.TypeSystem;
-
-namespace ICSharpCode.SharpDevelop.Refactoring
-{
-	public class GoToClassAction : IContextAction
-	{
-		public string Title { get; private set; }
-		public ITypeDefinition Class { get; private set; }
-		
-		public GoToClassAction(ITypeDefinition c, string title)
-		{
-			if (c == null)
-				throw new ArgumentNullException("c");
-			if (title == null)
-				throw new ArgumentNullException("title");
-			this.Class = c;
-			this.Title = title;
-		}
-		
-		public void Execute(EditorContext context)
-		{
-			NavigationService.NavigateTo(this.Class);
-		}
-	}
-}

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

@@ -7,24 +7,24 @@ using ICSharpCode.SharpDevelop.Parser;
 
 namespace ICSharpCode.SharpDevelop.Refactoring
 {
-	public class GoToMemberAction : IContextAction
+	public class GoToEntityAction : IContextAction
 	{
-		public string Title { get; private set; }
-		public IMember Member { get; private set; }
+		public string DisplayName { get; private set; }
+		public IEntity Entity { get; private set; }
 		
-		public GoToMemberAction(IMember member, IAmbience ambience)
+		public GoToEntityAction(IEntity entity, IAmbience ambience)
 		{
 			if (ambience == null)
 				throw new ArgumentNullException("ambience");
-			if (member == null)
-				throw new ArgumentNullException("member");
-			this.Member = member;
-			this.Title = ambience.ConvertEntity(member);
+			if (entity == null)
+				throw new ArgumentNullException("entity");
+			this.Entity = entity;
+			this.DisplayName = ambience.ConvertEntity(entity);
 		}
 		
 		public void Execute(EditorContext context)
 		{
-			NavigationService.NavigateTo(this.Member);
+			NavigationService.NavigateTo(this.Entity);
 		}
 	}
 }