fix: Handle interface in XamlFileGenerator.IsType

src/SourceGenerators/Uno.UI.SourceGenerators.Tests/XamlCodeGeneratorTests/Given_Parser.cs

@@ -135,4 +135,75 @@ public class C { }
 
 		await test.RunAsync();
 	}
+
+	[TestMethod]
+	public async Task When_Attached_DP_Interface_Type()
+	{
+		var xamlFile = new XamlFile(
+			"MainPage.xaml",
+			"""
+			<Page x:Class="TestRepro.MainPage"
+					xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+					xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+					xmlns:local="using:TestRepro"
+					xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006">
+
+				<Grid>
+					<local:MyAttached.MyProperty>
+						<local:TestDisposable />
+					</local:MyAttached.MyProperty>
+				</Grid>
+			</Page>
+			""");
+
+		var test = new Verify.Test(xamlFile)
+		{
+			TestState =
+			{
+				Sources =
+				{
+					"""
+					using System;
+					using Microsoft.UI.Xaml;
+					using Microsoft.UI.Xaml.Controls;
+
+					namespace TestRepro
+					{
+						public sealed partial class MainPage : Page
+						{
+							public MainPage()
+							{
+								this.InitializeComponent();
+							}
+						}
+
+						internal class TestDisposable : ITestInterface { }
+
+						internal static class MyAttached
+						{
+							public static ITestInterface GetMyProperty(DependencyObject obj)
+							{
+								return (ITestInterface)obj.GetValue(MyPropertyProperty);
+							}
+
+							public static void SetMyProperty(DependencyObject obj, ITestInterface value)
+							{
+								obj.SetValue(MyPropertyProperty, value);
+							}
+
+							public static readonly DependencyProperty MyPropertyProperty =
+								DependencyProperty.RegisterAttached("MyProperty", typeof(ITestInterface), typeof(MyAttached), new PropertyMetadata(null));
+						}
+
+
+						interface ITestInterface { }
+					
+					}
+					"""
+				}
+			}
+		}.AddGeneratedSources();
+
+		await test.RunAsync();
+	}
 }

src/SourceGenerators/Uno.UI.SourceGenerators.Tests/XamlCodeGeneratorTests/Out/WADPIT/XamlCodeGenerator_GlobalStaticResources.cs

@@ -0,0 +1,58 @@
+// <autogenerated />
+#if __WASM__
+#error invalid internal source generator state. The __WASM__ DefineConstant was not propagated properly.
+#endif
+namespace MyProject
+{
+	/// <summary>
+	/// Contains all the static resources defined for the application
+	/// </summary>
+	public sealed partial class GlobalStaticResources
+	{
+		static bool _initialized;
+		private static bool _stylesRegistered;
+		private static bool _dictionariesRegistered;
+		internal static global::Uno.UI.Xaml.XamlParseContext __ParseContext_ {get; } = new global::Uno.UI.Xaml.XamlParseContext()
+		{
+			AssemblyName = "TestProject",
+		}
+		;
+
+		static GlobalStaticResources()
+		{
+			Initialize();
+		}
+		public static void Initialize()
+		{
+			if (!_initialized)
+			{
+				_initialized = true;
+				global::Uno.UI.GlobalStaticResources.Initialize();
+				global::Uno.UI.GlobalStaticResources.RegisterDefaultStyles();
+				global::Uno.UI.GlobalStaticResources.RegisterResourceDictionariesBySource();
+			}
+		}
+		public static void RegisterDefaultStyles()
+		{
+			if(!_stylesRegistered)
+			{
+				_stylesRegistered = true;
+				RegisterDefaultStyles_MainPage_d6cd66944958ced0c513e0a04797b51d();
+			}
+		}
+		// Register ResourceDictionaries using ms-appx:/// syntax, this is called for external resources
+		public static void RegisterResourceDictionariesBySource()
+		{
+			if(!_dictionariesRegistered)
+			{
+				_dictionariesRegistered = true;
+			}
+		}
+		// Register ResourceDictionaries using ms-resource:/// syntax, this is called for local resources
+		internal static void RegisterResourceDictionariesBySourceLocal()
+		{
+		}
+		static partial void RegisterDefaultStyles_MainPage_d6cd66944958ced0c513e0a04797b51d();
+
+	}
+}

src/SourceGenerators/Uno.UI.SourceGenerators.Tests/XamlCodeGeneratorTests/Out/WADPIT/XamlCodeGenerator_LocalizationResources.cs

@@ -0,0 +1,2 @@
+// <auto-generated />
+[assembly: global::System.Reflection.AssemblyMetadata("UnoHasLocalizationResources", "False")]

src/SourceGenerators/Uno.UI.SourceGenerators.Tests/XamlCodeGeneratorTests/Out/WADPIT/XamlCodeGenerator_MainPage_d6cd66944958ced0c513e0a04797b51d.cs

@@ -0,0 +1,104 @@
+// <autogenerated />
+#pragma warning disable CS0114
+#pragma warning disable CS0108
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using Uno.UI;
+using Uno.UI.Xaml;
+using Microsoft.UI.Xaml;
+using Microsoft.UI.Xaml.Controls;
+using Microsoft.UI.Xaml.Controls.Primitives;
+using Microsoft.UI.Xaml.Data;
+using Microsoft.UI.Xaml.Documents;
+using Microsoft.UI.Xaml.Media;
+using Microsoft.UI.Xaml.Media.Animation;
+using Microsoft.UI.Xaml.Shapes;
+using Windows.UI.Text;
+using Uno.Extensions;
+using Uno;
+using Uno.UI.Helpers;
+using Uno.UI.Helpers.Xaml;
+using MyProject;
+
+#if __ANDROID__
+using _View = Android.Views.View;
+#elif __IOS__
+using _View = UIKit.UIView;
+#elif __MACOS__
+using _View = AppKit.NSView;
+#else
+using _View = Microsoft.UI.Xaml.UIElement;
+#endif
+
+namespace TestRepro
+{
+	partial class MainPage : global::Microsoft.UI.Xaml.Controls.Page
+	{
+		[global::System.ComponentModel.EditorBrowsable(global::System.ComponentModel.EditorBrowsableState.Never)]
+		private const string __baseUri_prefix_MainPage_d6cd66944958ced0c513e0a04797b51d = "ms-appx:///TestProject/";
+		[global::System.ComponentModel.EditorBrowsable(global::System.ComponentModel.EditorBrowsableState.Never)]
+		private const string __baseUri_MainPage_d6cd66944958ced0c513e0a04797b51d = "ms-appx:///TestProject/";
+		private global::Microsoft.UI.Xaml.NameScope __nameScope = new global::Microsoft.UI.Xaml.NameScope();
+		private void InitializeComponent()
+		{
+			NameScope.SetNameScope(this, __nameScope);
+			var __that = this;
+			base.IsParsing = true;
+			// Source 0\MainPage.xaml (Line 1:2)
+			base.Content = 
+			new global::Microsoft.UI.Xaml.Controls.Grid
+			{
+				IsParsing = true,
+				// Source 0\MainPage.xaml (Line 7:3)
+			}
+			.MainPage_d6cd66944958ced0c513e0a04797b51d_XamlApply((MainPage_d6cd66944958ced0c513e0a04797b51dXamlApplyExtensions.XamlApplyHandler0)(c0 => 
+			{
+				global::TestRepro.MyAttached.SetMyProperty(c0, 
+					new global::TestRepro.TestDisposable
+					{
+						// Source 0\MainPage.xaml (Line 9:5)
+					}
+				);
+				global::Uno.UI.FrameworkElementHelper.SetBaseUri(c0, __baseUri_MainPage_d6cd66944958ced0c513e0a04797b51d);
+				c0.CreationComplete();
+			}
+			))
+			;
+
+			this
+			.GenericApply(((c1) => 
+			{
+				// Source 0\MainPage.xaml (Line 1:2)
+
+				// WARNING Property c1.base does not exist on {http://schemas.microsoft.com/winfx/2006/xaml/presentation}Page, the namespace is http://www.w3.org/XML/1998/namespace. This error was considered irrelevant by the XamlFileGenerator
+			}
+			))
+			.GenericApply(((c2) => 
+			{
+				// Class TestRepro.MainPage
+				global::Uno.UI.FrameworkElementHelper.SetBaseUri(c2, __baseUri_MainPage_d6cd66944958ced0c513e0a04797b51d);
+				c2.CreationComplete();
+			}
+			))
+			;
+			OnInitializeCompleted();
+
+		}
+		partial void OnInitializeCompleted();
+	}
+}
+namespace MyProject
+{
+	static class MainPage_d6cd66944958ced0c513e0a04797b51dXamlApplyExtensions
+	{
+		public delegate void XamlApplyHandler0(global::Microsoft.UI.Xaml.Controls.Grid instance);
+		[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
+		public static global::Microsoft.UI.Xaml.Controls.Grid MainPage_d6cd66944958ced0c513e0a04797b51d_XamlApply(this global::Microsoft.UI.Xaml.Controls.Grid instance, XamlApplyHandler0 handler)
+		{
+			handler(instance);
+			return instance;
+		}
+	}
+}

src/SourceGenerators/Uno.UI.SourceGenerators/XamlGenerator/XamlFileGenerator.Reflection.cs

@@ -102,6 +102,11 @@ private static bool IsType([NotNullWhen(true)] INamedTypeSymbol? namedTypeSymbol
 					return true;
 				}
 
+				if (typeSymbol is INamedTypeSymbol { TypeKind: TypeKind.Interface })
+				{
+					return namedTypeSymbol.AllInterfaces.Contains(typeSymbol);
+				}
+
 				do
 				{
 					if (SymbolEqualityComparer.Default.Equals(namedTypeSymbol, typeSymbol))