From fa137e58e7e86fdcae37dc85ed8dae04536cb2d3 Mon Sep 17 00:00:00 2001
From: Kir_Antipov <kp.antipov@gmail.com>
Date: Sun, 5 May 2024 21:29:03 +0300
Subject: [PATCH] Added a way to identify auto-generated members

See AvaloniaUI/Avalonia#15616
---
 src/HotAvalonia/AvaloniaRuntimeXamlScanner.cs | 25 ++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/src/HotAvalonia/AvaloniaRuntimeXamlScanner.cs b/src/HotAvalonia/AvaloniaRuntimeXamlScanner.cs
index c2fe49e..b1cd347 100644
--- a/src/HotAvalonia/AvaloniaRuntimeXamlScanner.cs
+++ b/src/HotAvalonia/AvaloniaRuntimeXamlScanner.cs
@@ -1,3 +1,4 @@
+using System.CodeDom.Compiler;
 using System.Diagnostics.CodeAnalysis;
 using System.Reflection;
 using System.Reflection.Emit;
@@ -374,7 +375,8 @@ private static IEnumerable<AvaloniaControlInfo> ExtractAvaloniaControls(ReadOnly
 
         return userControlType
             .GetMethods(InstanceMember)
-            .OrderByDescending(static x => x.GetParameters().Length)
+            .OrderByDescending(static x => x.IsGeneratedByAvalonia())
+            .ThenByDescending(static x => x.GetParameters().Length)
             .FirstOrDefault(static x =>
                 x.Name.Equals(initializeComponentMethodName, StringComparison.Ordinal)
                 && x.ReturnType == typeof(void));
@@ -530,4 +532,25 @@ internal static IEnumerable<MethodInfo> FindDynamicPopulateMethods(string uri)
                 yield return populateMethod;
         }
     }
+
+    /// <summary>
+    /// Determines whether the specified member is generated by Avalonia.
+    /// </summary>
+    /// <param name="member">The member to check.</param>
+    /// <returns>
+    /// <c>true</c> if the specified member is generated by Avalonia;
+    /// otherwise, <c>false</c>.
+    /// </returns>
+    internal static bool IsGeneratedByAvalonia(this MemberInfo member)
+    {
+        const string avaloniaGeneratorNamePrefix = "Avalonia.Generators.";
+
+        _ = member ?? throw new ArgumentNullException(nameof(member));
+
+        GeneratedCodeAttribute? generatedCodeAttribute = member.GetCustomAttribute<GeneratedCodeAttribute>();
+        if (generatedCodeAttribute is not { Tool: not null })
+            return false;
+
+        return generatedCodeAttribute.Tool.StartsWith(avaloniaGeneratorNamePrefix, StringComparison.Ordinal);
+    }
 }