made IsAutomaticProperty static and internal, removed dependency on ITextEditor, works now with any IProperty in any class, even partial classes

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

@@ -10,7 +10,7 @@ using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using System.Windows.Documents;
-
+using ICSharpCode.AvalonEdit.Document;
 using ICSharpCode.Core.Presentation;
 using ICSharpCode.Core.WinForms;
 using ICSharpCode.NRefactory;
@@ -48,7 +48,7 @@ namespace SharpRefactoring
 			ITextEditor editor = FindReferencesAndRenameHelper.OpenDefinitionFile(property, false);
 			string field = null;
 			PropertyDeclaration astProp = null;
-			if (IsAutomaticProperty(editor, property)) {
+			if (IsAutomaticProperty(property)) {
 				cmd = new MenuCommand("${res:SharpDevelop.Refactoring.ExpandAutomaticProperty}", ExpandAutomaticProperty);
 				cmd.Tag = property;
 				items.Add(cmd);
@@ -68,21 +68,38 @@ namespace SharpRefactoring
 			return items.ToArray();
 		}
 		
-		bool IsAutomaticProperty(ITextEditor editor, IProperty property)
+		internal static bool IsAutomaticProperty(IProperty property)
 		{
-			if (editor == null)
+			string fileName = property.CompilationUnit.FileName;
+			
+			if (fileName == null)
 				return false;
 			
+			IDocument document;
+			ITextEditorProvider provider = FileService.GetOpenFile(fileName) as ITextEditorProvider;
+			
+			if (provider == null) {
+				if (!File.Exists(fileName))
+					return false;
+				try {
+					document = DocumentUtilitites.LoadDocumentFromBuffer(new StringTextBuffer(File.ReadAllText(fileName)));
+				} catch (IOException) {
+					return false;
+				}
+			} else {
+				document = provider.TextEditor.Document;
+			}
+			
 			bool isAutomatic = false;
 			
 			if (property.CanGet) {
 				if (property.GetterRegion.IsEmpty)
 					isAutomatic = true;
 				else {
-					int getterStartOffset = editor.Document.PositionToOffset(property.GetterRegion.BeginLine, property.GetterRegion.BeginColumn);
-					int getterEndOffset = editor.Document.PositionToOffset(property.GetterRegion.EndLine, property.GetterRegion.EndColumn);
+					int getterStartOffset = document.PositionToOffset(property.GetterRegion.BeginLine, property.GetterRegion.BeginColumn);
+					int getterEndOffset = document.PositionToOffset(property.GetterRegion.EndLine, property.GetterRegion.EndColumn);
 					
-					string text = editor.Document.GetText(getterStartOffset, getterEndOffset - getterStartOffset)
+					string text = document.GetText(getterStartOffset, getterEndOffset - getterStartOffset)
 						.Replace(" ", "").Replace("\t", "").Replace("\n", "").Replace("\r", "");
 					
 					isAutomatic = text == "get;";
@@ -93,10 +110,10 @@ namespace SharpRefactoring
 				if (property.SetterRegion.IsEmpty)
 					isAutomatic |= true;
 				else {
-					int setterStartOffset = editor.Document.PositionToOffset(property.SetterRegion.BeginLine, property.SetterRegion.BeginColumn);
-					int setterEndOffset = editor.Document.PositionToOffset(property.SetterRegion.EndLine, property.SetterRegion.EndColumn);
+					int setterStartOffset = document.PositionToOffset(property.SetterRegion.BeginLine, property.SetterRegion.BeginColumn);
+					int setterEndOffset = document.PositionToOffset(property.SetterRegion.EndLine, property.SetterRegion.EndColumn);
 					
-					string text = editor.Document.GetText(setterStartOffset, setterEndOffset - setterStartOffset)
+					string text = document.GetText(setterStartOffset, setterEndOffset - setterStartOffset)
 						.Replace(" ", "").Replace("\t", "").Replace("\n", "").Replace("\r", "");
 					
 					isAutomatic |= text == "set;";