Add CurrentParseInformation to EditorContext. This allows retrieving the ProjectContent without requiring CallingClass!=null (fixes http://community.sharpdevelop.net/forums/t/11756.aspx)

Also removed some try-catch-ignore constructs.

src/AddIns/Misc/SharpRefactoring/Project/Src/ContextActions/AddUsing.cs

@@ -21,50 +21,41 @@ namespace SharpRefactoring.ContextActions
 	public class AddUsingProvider : ContextActionsProvider
 	{
 		public override IEnumerable<IContextAction> GetAvailableActions(EditorContext context)
-		{
-			foreach (var contextAction in GetAddUsingContextActions(context.CurrentSymbol, context.Editor, context.CurrentExpression.Context)) {
-				yield return contextAction;
-			}
-		}
-		
-		IEnumerable<IContextAction> GetAddUsingContextActions(ResolveResult symbol, ITextEditor editor, ExpressionContext exprContext)
 		{
 			// class
-			foreach (var addUsingAction in RefactoringService.GetAddUsingActions(symbol,editor)) {
+			foreach (var addUsingAction in RefactoringService.GetAddUsingActions(context.CurrentSymbol, context.Editor)) {
 				yield return addUsingAction;
 			}
 			// extension method
-			if (exprContext != ExpressionContext.Attribute) {
-				foreach (var addUsingAction in GetAddUsingExtensionMethodActions(symbol, editor)) {
+			if (context.CurrentExpression.Context != ExpressionContext.Attribute) {
+				foreach (var addUsingAction in GetAddUsingExtensionMethodActions(context)) {
 					yield return addUsingAction;
 				}
 			}
 			// attribute
-			if (exprContext == ExpressionContext.Attribute) {
-				foreach (var addUsingAction in GetAddUsingAttributeActions(symbol, editor)) {
+			if (context.CurrentExpression.Context == ExpressionContext.Attribute) {
+				foreach (var addUsingAction in GetAddUsingAttributeActions(context)) {
 					yield return addUsingAction;
 				}
 			}
 		}
 		
 		#region Extension method
-		IEnumerable<IContextAction> GetAddUsingExtensionMethodActions(ResolveResult symbol, ITextEditor editor)
+		IEnumerable<IContextAction> GetAddUsingExtensionMethodActions(EditorContext context)
 		{
-			if (!(symbol is UnknownMethodResolveResult))
+			UnknownMethodResolveResult rr = context.CurrentSymbol as UnknownMethodResolveResult;
+			if (rr == null)
 				yield break;
 			
-			UnknownMethodResolveResult rr = symbol as UnknownMethodResolveResult;
 			List<IClass> results = new List<IClass>();
-			IProjectContent pc = rr.CallingClass.ProjectContent;
+			IProjectContent pc = context.ProjectContent;
 			
 			SearchAllExtensionMethodsWithName(results, pc, rr.CallName);
 			foreach (IProjectContent content in pc.ReferencedContents)
 				SearchAllExtensionMethodsWithName(results, content, rr.CallName);
-			if (!results.Any())
-				yield break;
 			
 			foreach (IClass c in results) {
-				yield return new RefactoringService.AddUsingAction(rr.CallingClass.CompilationUnit, editor, c.Namespace);
+				yield return new RefactoringService.AddUsingAction(context.CurrentParseInformation.CompilationUnit, context.Editor, c.Namespace);
 			}
 		}
 		
@@ -79,14 +70,15 @@ namespace SharpRefactoring.ContextActions
 		#endregion
 		
 		#region Attribute
-		IEnumerable<IContextAction> GetAddUsingAttributeActions(ResolveResult symbol, ITextEditor editor)
+		IEnumerable<IContextAction> GetAddUsingAttributeActions(EditorContext context)
 		{
+			ResolveResult symbol = context.CurrentSymbol;
 			if (!(symbol is UnknownIdentifierResolveResult || symbol is UnknownMethodResolveResult))
 				yield break;
 
 			List<IClass> results = new List<IClass>();
 			
-			ParseInformation info = ParserService.GetParseInformation(editor.FileName);
+			ParseInformation info = context.CurrentParseInformation;
 			if (info == null || info.CompilationUnit == null || info.CompilationUnit.ProjectContent == null)
 				yield break;
 			ICompilationUnit unit = info.CompilationUnit;
@@ -103,7 +95,7 @@ namespace SharpRefactoring.ContextActions
 			}
 			
 			foreach (IClass c in results) {
-				yield return new RefactoringService.AddUsingAction(unit, editor, c.Namespace);
+				yield return new RefactoringService.AddUsingAction(unit, context.Editor, c.Namespace);
 			}
 		}
 		

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

@@ -38,6 +38,20 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 		/// </summary>
 		public ResolveResult CurrentSymbol { get; private set; }
 		
+		/// <summary>
+		/// Language independent.
+		/// </summary>
+		public ParseInformation CurrentParseInformation { get; private set; }
+		
+		public IProjectContent ProjectContent { 
+			get {
+				if (CurrentParseInformation != null)
+					return CurrentParseInformation.CompilationUnit.ProjectContent;
+				else
+					return null;
+			}
+		}
+		
 		public IDocumentLine CurrentLine { get; private set; }
 		/// <summary>
 		/// Only available for C# and VB.
@@ -70,6 +84,7 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 			
 			this.CurrentExpression = GetExpressionAtCaret(editor);
 			this.CurrentSymbol = ResolveExpression(CurrentExpression, editor, CaretLine, CaretColumn);
+			this.CurrentParseInformation = ParserService.GetExistingParseInformation(editor.FileName);
 			
 			this.CurrentLine = editor.Document.GetLine(CaretLine);
 			this.CurrentLineAST = GetCurrentLineAst(this.CurrentLine, editor);
@@ -202,12 +217,12 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 			var snippetParser = GetSnippetParser(editor);
 			if (snippetParser == null)
 				return null;
-			try	{
+			//try	{
 				return snippetParser.Parse(currentLine.Text);
-			}
-			catch {
-				return null;
-			}
+			//}
+			//catch {
+			//	return null;
+			//}
 		}
 		
 		SnippetParser GetSnippetParser(ITextEditor editor)
@@ -233,13 +248,12 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 		
 		INode GetCurrentMemberAST(ITextEditor editor)
 		{
-			try {
+			//try {
 				var resolver = GetInitializedNRefactoryResolver(editor, this.CaretLine, this.CaretColumn);
 				return resolver.ParseCurrentMember(editor.Document.Text);
-			}
-			catch {
-				return null;
-			}
+			//} catch {
+			//	return null;
+			//}
 		}
 		
 		NRefactoryResolver GetInitializedNRefactoryResolver(ITextEditor editor, int caretLine, int caretColumn)