improved display of strings and characters in debugger tooltips

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@5706 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/Debugger/Debugger.AddIn/TreeModel/ExpressionNode.cs

@@ -181,6 +181,15 @@ namespace Debugger.AddIn.TreeModel
 				fullText = FormatInteger(val.PrimitiveValue);
 			} else if (val.Type.IsPointer) {
 				fullText = String.Format("0x{0:X}", val.PointerAddress);
+			} else if ((val.Type.FullName == typeof(string).FullName ||
+			            val.Type.FullName == typeof(char).FullName) && !val.IsNull) {
+				try {
+					fullText = '"' + Escape(val.InvokeToString()) + '"';
+				} catch (GetValueException e) {
+					error = e;
+					fullText = e.Message;
+					return;
+				}
 			} else if ((val.Type.IsClass || val.Type.IsValueType) && !val.IsNull) {
 				try {
 					fullText = val.InvokeToString();
@@ -196,6 +205,19 @@ namespace Debugger.AddIn.TreeModel
 			this.Text = (fullText.Length > 256) ? fullText.Substring(0, 256) + "..." : fullText;
 		}
 		
+		string Escape(string source)
+		{
+			return source.Replace("\n", "\\n")
+				.Replace("\t", "\\t")
+				.Replace("\r", "\\r")
+				.Replace("\0", "\\0")
+				.Replace("\b", "\\b")
+				.Replace("\a", "\\a")
+				.Replace("\f", "\\f")
+				.Replace("\v", "\\v")
+				.Replace("\"", "\\\"");  
+		}
+		
 		string FormatInteger(object i)
 		{
 			if (DebuggingOptions.Instance.ShowIntegersAs == ShowIntegersAs.Decimal)