Allow accessing the refkey in the data transformer.

Author: Lyeeedar

StructuredXmlEditor/Data/DataTransformer.cs

@@ -1,4 +1,5 @@
-using System;
+using StructuredXmlEditor.Definition;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
@@ -174,6 +175,10 @@ public IEnumerable<XElement> TransformElement(XElement root, XElement originalEl
 							variableValue = targetEl.Value;
 						}
 					}
+					else if (variableSplit[2] == "refkey")
+					{
+						variableValue = targetEl.Attribute(DataDefinition.MetaNS + "RefKey").Value;
+					}
 					else if (!string.IsNullOrWhiteSpace(variableSplit[2]))
 					{
 						throw new Exception("Unknown variable part type '" + variableSplit[2] + "'!");

StructuredXmlEditor/View/CustomControls/DataTransformerToolView.xaml

@@ -92,7 +92,7 @@
 		<TextBlock
 			Grid.Row="2"
 			Margin="5,5,5,0"
-			Text="Replace template. Access content with {(el,root) | (path) | (contents,name)}." />
+			Text="Replace template. Access content with {(el,root) | (path) | (contents,name,refkey)}." />
 		<local:PromptTextBox
 			Grid.Row="3"
 			AcceptsReturn="True"