1 files changed, 96 insertions, 0 deletions
diff --git a/main/src/addins/MonoDevelop.Refactoring/MonoDevelop.Refactoring/RefactoringSymbolInfo.cs b/main/src/addins/MonoDevelop.Refactoring/MonoDevelop.Refactoring/RefactoringSymbolInfo.cs
new file mode 100644
index 0000000000..2305f274a3
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+++ b/main/src/addins/MonoDevelop.Refactoring/MonoDevelop.Refactoring/RefactoringSymbolInfo.cs
@@ -0,0 +1,96 @@
+//
+// RefactoringSymbolInfo.cs
+//
+// Author:
+//       Mike Krüger <mkrueger@xamarin.com>
+//
+// Copyright (c) 2015 Xamarin Inc. (http://xamarin.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+using MonoDevelop.Core;
+using MonoDevelop.Ide.Gui;
+using MonoDevelop.Components.Commands;
+using MonoDevelop.Refactoring;
+using MonoDevelop.Ide;
+using Microsoft.CodeAnalysis;
+using System.Collections.Immutable;
+using System.Threading.Tasks;
+using MonoDevelop.Ide.Editor;
+using System.Threading;
+using System;
+using Microsoft.CodeAnalysis.CSharp;
+
+namespace MonoDevelop.Refactoring
+{
+
+	class RefactoringSymbolInfo
+	{
+		public readonly static RefactoringSymbolInfo Empty = new RefactoringSymbolInfo(new SymbolInfo());
+
+		SymbolInfo symbolInfo;
+
+		public ISymbol Symbol {
+			get {
+				return symbolInfo.Symbol;
+			}
+		}
+
+		public ImmutableArray<ISymbol> CandidateSymbols {
+			get {
+				return symbolInfo.CandidateSymbols;
+			}
+		}
+
+		public ISymbol DeclaredSymbol {
+			get;
+			internal set;
+		}
+
+		public RefactoringSymbolInfo (SymbolInfo symbolInfo)
+		{
+			this.symbolInfo = symbolInfo;
+		}
+
+		public static async Task<RefactoringSymbolInfo> GetSymbolInfoAsync (DocumentContext document, int offset, CancellationToken cancellationToken = default(CancellationToken))
+		{
+			if (document == null)
+				throw new ArgumentNullException ("document");
+			if (document.ParsedDocument == null)
+				return RefactoringSymbolInfo.Empty;
+			var unit = document.ParsedDocument.GetAst<SemanticModel> ();
+			if (unit != null) {
+				var root = await unit.SyntaxTree.GetRootAsync (cancellationToken).ConfigureAwait (false);
+				try {
+					var token = root.FindToken (offset);
+					if (!token.Span.IntersectsWith (offset))
+						return RefactoringSymbolInfo.Empty;
+					var symbol = unit.GetSymbolInfo (token.Parent);
+					return new RefactoringSymbolInfo (symbol) {
+						DeclaredSymbol = token.IsKind (SyntaxKind.IdentifierToken) ? unit.GetDeclaredSymbol (token.Parent) : null
+					};
+				} catch (Exception) {
+					return RefactoringSymbolInfo.Empty;
+				}
+			}
+			return RefactoringSymbolInfo.Empty;
+		}
+	}
+	
+}