ResourceToolkit: Fixed resource tooltips by adapting NRefactoryResourceResolver to the new behavior of the C# ExpressionFinder.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@2955 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/Misc/ResourceToolkit/Project/Src/Resolver/NRefactoryResourceResolver.cs

@@ -111,31 +111,37 @@ namespace Hornung.ResourceToolkit.Resolver
 				return null;
 			}
 			
+			while (true) {
+				
 				ExpressionResult result = ef.FindFullExpression(document.TextContent, caretOffset);
 				
 				if (result.Expression == null) {
-				// may happen if in string
-				while (--caretOffset > 0 && (result = ef.FindFullExpression(document.TextContent, caretOffset)).Expression == null) {
-					if (document.GetLineNumberForOffset(caretOffset) != caretLine) {
-						// only look in same line
-						break;
-					}
+					// Try to find an expression to the left, but only
+					// in the same line.
+					if (--caretOffset < 0 || document.GetLineNumberForOffset(caretOffset) != caretLine) {
+						return null;
 					}
+					continue;
 				}
 				
-			if (result.Expression != null) {
-				
+				PrimitiveExpression pe;
 				Expression expr = NRefactoryAstCacheService.ParseExpression(fileName, result.Expression, caretLine + 1, caretColumn + 1);
 				
 				if (expr == null) {
 					return null;
+				} else if ((pe = expr as PrimitiveExpression) != null) {
+					if (pe.Value is string) {
+						// We are inside a string literal and need to find
+						// the next outer expression to decide
+						// whether it is a resource key.
+						if (--caretOffset < 0) return null;
+						continue;
+					}
 				}
 				
 				return TryResolve(result, expr, caretLine, caretColumn, fileName, document.TextContent, ef, charTyped);
 				
 			}
-			
-			return null;
 		}
 		
 		// ********************************************************************************************************************************