Added constraint to TSV export

XSDVisualiser.Desktop/Views/LeftTreeView.axaml.cs

@@ -37,7 +37,7 @@ namespace XSDVisualiser.Desktop.Views
         {
             var sb = new StringBuilder();
             // Header
-            sb.AppendLine("Depth\tPath\tName\tNamespace\tTypeName\tBuiltInType\tMinOccurs\tMaxOccurs\tContentModel\tIsNillable");
+            sb.AppendLine("Depth\tPath\tName\tNamespace\tTypeName\tBuiltInType\tMinOccurs\tMaxOccurs\tContentModel\tConstraints\tIsNillable");
             var initialPath = root.Name ?? string.Empty;
             AppendNode(sb, root, 0, initialPath);
             return sb.ToString();
@@ -69,6 +69,7 @@ namespace XSDVisualiser.Desktop.Views
                 min,
                 max,
                 San(node.ContentModel),
+                San(FormatConstraints(node)),
                 node.IsNillable ? "true" : "false"
             });
             sb.AppendLine(line);
@@ -83,5 +84,34 @@ namespace XSDVisualiser.Desktop.Views
                 }
             }
         }
+
+        private static string FormatConstraints(SchemaNode node)
+        {
+            var cons = node.Constraints?.Constraints;
+            if (cons == null || cons.Count == 0) return string.Empty;
+
+            var dict = new System.Collections.Generic.SortedDictionary<string, System.Collections.Generic.SortedSet<string>>(System.StringComparer.Ordinal);
+            foreach (var c in cons)
+            {
+                var name = c.Name;
+                var value = c.Value;
+                if (string.IsNullOrEmpty(name) || string.IsNullOrEmpty(value)) continue;
+                if (!dict.TryGetValue(name, out var set))
+                {
+                    set = new System.Collections.Generic.SortedSet<string>(System.StringComparer.Ordinal);
+                    dict[name] = set;
+                }
+                set.Add(value);
+            }
+            if (dict.Count == 0) return string.Empty;
+
+            var parts = new System.Collections.Generic.List<string>(dict.Count);
+            foreach (var kvp in dict)
+            {
+                var joinedValues = string.Join(",", kvp.Value);
+                parts.Add($"{kvp.Key}={joinedValues}");
+            }
+            return string.Join(";", parts);
+        }
     }
 }