Remove reflection from InputPreview

ChatTwo/Ui/InputPreview.cs

@@ -1,5 +1,4 @@
 using System.Numerics;
-using System.Reflection;
 using System.Text;
 using System.Text.RegularExpressions;
 using ChatTwo.Code;
@@ -177,17 +176,13 @@ public partial class InputPreview : Window
             if (icon.Icon != BitmapFontIcon.AutoTranslateBegin)
                 return;
 
-            try
-            {
-                NextChunkIsAutoTranslate = true;
-                var key = (uint)typeof(AutoTranslatePayload).GetField("key", BindingFlags.NonPublic | BindingFlags.Instance)!.GetValue(chunk.Link)!;
-                var group = (uint)typeof(AutoTranslatePayload).GetField("group", BindingFlags.NonPublic | BindingFlags.Instance)!.GetValue(chunk.Link)!;
-                CursorPosition += $"<at:{key},{group}>".Length;
-            }
-            catch
-            {
-                // Ignore
-            }
+            NextChunkIsAutoTranslate = true;
+
+            // Skipping: StartByte, PayloadType, PayloadLength
+            using var reader = new BinaryReader(new MemoryStream(chunk.Link!.Encode().Skip(3).ToArray()));
+            var group = (uint) reader.ReadByte();
+            var key = PayloadExt.GetInteger(reader);
+            CursorPosition += $"<at:{group},{key}>".Length;
 
             return;
         }

ChatTwo/Util/Payloads.cs

@@ -2,6 +2,33 @@ using Dalamud.Game.Text.SeStringHandling;
 
 namespace ChatTwo.Util;
 
+internal static class PayloadExt
+{
+    // TODO: Remove after Key and Group in AutoTranslatePayload became public
+    // From: https://github.com/goatcorp/Dalamud/blob/master/Dalamud/Game/Text/SeStringHandling/Payload.cs#L366
+    /// <summary>
+    /// Retrieve the packed integer from SE's native data format.
+    /// </summary>
+    /// <param name="input">The BinaryReader instance.</param>
+    /// <returns>An integer.</returns>
+    internal static uint GetInteger(BinaryReader input)
+    {
+        uint marker = input.ReadByte();
+        if (marker < 0xD0)
+            return marker - 1;
+
+        marker = (marker + 1) & 0b1111;
+
+        var ret = new byte[4];
+        for (var i = 3; i >= 0; i--)
+        {
+            ret[i] = (marker & (1 << i)) == 0 ? (byte)0 : input.ReadByte();
+        }
+
+        return BitConverter.ToUInt32(ret, 0);
+    }
+}
+
 internal class PartyFinderPayload : Payload {
     public override PayloadType Type => (PayloadType) 0x50;