Improve compatibility of FTextProperty parser

UnrealEngine.Gvas/FProperties/FTextProperty.cs

@@ -1,29 +1,58 @@
+using System.Xml.Linq;
 namespace UnrealEngine.Gvas.FProperties;
 
 [OptionalGuid]
 public class FTextProperty : FProperty
 {
+ public string? Owner { get; set; }
+ public string? Identifier { get; set; }
  public string? Value { get; set; }
  public int Unknown1 { get; set; }
- public byte Unknown2 { get; set; }
- public byte[]? Unknown3 { get; set; }
+ public byte Flags { get; set; }
 
  internal override void Read(BinaryReader reader, string? propertyName, long fieldLength, bool bodyOnly = false)
  {
  long startPos = reader.BaseStream.Position;
  Unknown1 = reader.ReadInt32();
- Unknown2 = reader.ReadByte();
- if (Unknown1 != 0)
+ Flags = reader.ReadByte();
+ if (fieldLength == 5)
  {
- reader.ReadInt32();
+ if (Flags != 255)
+ {
+ throw new NotImplementedException();
+ }
+ return;
+ }
+ Owner = reader.ReadFString();
+ if (Flags == 255)
+ {
+ // no extra fields
+ }
+ else if (Flags == 11)
+ {
+ Identifier = reader.ReadFString();
+ }
+ else if (Flags == 0)
+ {
+ Identifier = reader.ReadFString();
  Value = reader.ReadFString();
- int bytesLeft = (int) (fieldLength - (reader.BaseStream.Position - startPos));
- Unknown3 = reader.ReadBytes(bytesLeft);
+ }
+ else
+ {
+ throw new NotImplementedException();
  }
  }
 
  protected override IEnumerable<object> SerializeContent()
  {
- throw new NotImplementedException();
+ yield return Value ?? string.Empty;
+ }
+
+ protected override void ModifyXmlNode(XElement element)
+ {
+ if (Owner is {Length: > 0})
+ element.SetAttributeValue("Owner", Owner);
+ if (Identifier is {Length: > 0})
+ element.SetAttributeValue("Identifier", Identifier);
  }
 }