chore: ITemplatedParentProvider removal (backport #18443)

src/SourceGenerators/Uno.UI.SourceGenerators.Tests/DependencyObjectGeneratorTests/Given_DependencyObjectGenerator.cs

@@ -159,7 +159,7 @@ internal partial class Inner : DependencyObject
 	 partial class OuterClass
 	 {
 	 	[global::Microsoft.UI.Xaml.Data.Bindable]
-	 	partial class Inner : IDependencyObjectStoreProvider, ITemplatedParentProvider, IWeakReferenceProvider
+	 	partial class Inner : IDependencyObjectStoreProvider, IWeakReferenceProvider
 	 	{
 	 		private DependencyObjectStore __storeBackingField;
 	 		public global::Windows.UI.Core.CoreDispatcher Dispatcher => global::Windows.ApplicationModel.Core.CoreApplication.MainView.Dispatcher;
@@ -185,28 +185,6 @@ private DependencyObjectStore __Store
 	 		public object GetAnimationBaseValue(DependencyProperty dp) => __Store.GetAnimationBaseValue(dp);
 	 		public long RegisterPropertyChangedCallback(DependencyProperty dp, DependencyPropertyChangedCallback callback) => __Store.RegisterPropertyChangedCallback(dp, callback);
 	 		public void UnregisterPropertyChangedCallback(DependencyProperty dp, long token) => __Store.UnregisterPropertyChangedCallback(dp, token);
-
-	 		[EditorBrowsable(EditorBrowsableState.Never)]private ManagedWeakReference _templatedParentWeakRef;
-	 		[EditorBrowsable(EditorBrowsableState.Never)]public ManagedWeakReference GetTemplatedParentWeakRef() => _templatedParentWeakRef;
-
-	 		[EditorBrowsable(EditorBrowsableState.Never)]public DependencyObject GetTemplatedParent() => _templatedParentWeakRef?.Target as DependencyObject;
-	 		[EditorBrowsable(EditorBrowsableState.Never)]public void SetTemplatedParent(DependencyObject parent)
-	 		{
-	 			//if (parent != null)
-	 			//{
-	 			//	global::System.Diagnostics.Debug.Assert(parent
-	 			//		is global::Windows.UI.Xaml.Controls.Control
-	 			//		or global::Windows.UI.Xaml.Controls.ContentPresenter
-	 			//		or global::Windows.UI.Xaml.Controls.ItemsPresenter);
-	 			//	global::System.Diagnostics.Debug.Assert(GetTemplatedParent() == null);
-	 			//}
-
-	 			SetTemplatedParentImpl(parent);
-	 		}
-	 		[EditorBrowsable(EditorBrowsableState.Never)]private protected virtual void SetTemplatedParentImpl(DependencyObject parent)
-	 		{
-	 			_templatedParentWeakRef = (parent as IWeakReferenceProvider)?.WeakReference;
-	 		}
 
 	 		private readonly static IEventProvider _binderTrace = Tracing.Get(DependencyObjectStore.TraceProvider.Id);
 	 		private BinderReferenceHolder _refHolder;

src/SourceGenerators/Uno.UI.SourceGenerators/DependencyObject/DependencyObjectGenerator.cs

@@ -175,18 +175,15 @@ private void ProcessType(INamedTypeSymbol typeSymbol)
 						}
 					};
 
-					var canBeTpProvider = !typeSymbol.Interfaces.Any(x => x.Name == "INotTemplatedParentProvider");
-
 					var implementations = new string?[]
 					{
 						"IDependencyObjectStoreProvider",
 						_isUnoSolution && !typeSymbol.IsSealed ? "IDependencyObjectInternal" : null,
-						canBeTpProvider ? "ITemplatedParentProvider" : null,
 						"IWeakReferenceProvider",
 					}.Where(x => x is not null);
 					using (typeSymbol.AddToIndentedStringBuilder(builder, beforeClassHeaderAction, afterClassHeader: " : " + string.Join(", ", implementations)))
 					{
-						GenerateDependencyObjectImplementation(typeSymbol, builder, hasDispatcherQueue: _dependencyObjectSymbol!.GetMembers("DispatcherQueue").Any(), canBeTpProvider);
+						GenerateDependencyObjectImplementation(typeSymbol, builder, hasDispatcherQueue: _dependencyObjectSymbol!.GetMembers("DispatcherQueue").Any());
 						GenerateIBinderImplementation(typeSymbol, builder);
 					}
 
@@ -768,7 +765,7 @@ public override bool Equals(object other)
 				}
 			}
 
-			private void GenerateDependencyObjectImplementation(INamedTypeSymbol typeSymbol, IndentedStringBuilder builder, bool hasDispatcherQueue, bool implTpProvider)
+			private void GenerateDependencyObjectImplementation(INamedTypeSymbol typeSymbol, IndentedStringBuilder builder, bool hasDispatcherQueue)
 			{
 				builder.AppendLineIndented(@"private DependencyObjectStore __storeBackingField;");
 				builder.AppendLineIndented(@"public global::Windows.UI.Core.CoreDispatcher Dispatcher => global::Windows.ApplicationModel.Core.CoreApplication.MainView.Dispatcher;");
@@ -818,37 +815,6 @@ private void GenerateDependencyObjectImplementation(INamedTypeSymbol typeSymbol,
 						builder.AppendLineIndented("internal virtual void OnPropertyChanged2(global::Microsoft.UI.Xaml.DependencyPropertyChangedEventArgs args) { }");
 					}
 				}
-
-				if (implTpProvider)
-				{
-					var unoBrowsableOnly = _isUnoSolution ? null : "[EditorBrowsable(EditorBrowsableState.Never)]";
-
-					builder.AppendLine();
-					builder.AppendMultiLineIndented($$"""
-						{{unoBrowsableOnly}}private ManagedWeakReference _templatedParentWeakRef;
-						{{unoBrowsableOnly}}public ManagedWeakReference GetTemplatedParentWeakRef() => _templatedParentWeakRef;
-
-						{{unoBrowsableOnly}}public DependencyObject GetTemplatedParent() => _templatedParentWeakRef?.Target as DependencyObject;
-						{{unoBrowsableOnly}}public void SetTemplatedParent(DependencyObject parent)
-						{
-							//if (parent != null)
-							//{
-							//	global::System.Diagnostics.Debug.Assert(parent
-							//		is global::Windows.UI.Xaml.Controls.Control
-							//		or global::Windows.UI.Xaml.Controls.ContentPresenter
-							//		or global::Windows.UI.Xaml.Controls.ItemsPresenter);
-							//	global::System.Diagnostics.Debug.Assert(GetTemplatedParent() == null);
-							//}
-
-							SetTemplatedParentImpl(parent);
-						}
-						{{unoBrowsableOnly}}{{(typeSymbol.IsSealed ? "private" : "private protected virtual")}} void SetTemplatedParentImpl(DependencyObject parent)
-						{
-							_templatedParentWeakRef = (parent as IWeakReferenceProvider)?.WeakReference;
-						}
-						"""
-					);
-				}
 			}
 		}
 	}

src/Uno.UI.Maps/MapPresenter.cs

@@ -25,7 +25,7 @@ private void UpdateOwnerSubscriptions()
 		{
 			_ownerSubscription.Disposable = null;
 
-			_owner = GetTemplatedParent() as MapControl;
+			_owner = this.GetTemplatedParent() as MapControl;
 
 			if (_owner != null)
 			{

src/Uno.UI.RuntimeTests/Tests/TemplatedParent/TemplatedParentTests.cs

@@ -289,27 +289,6 @@ public async Task VisualStateGroup_TP_Inheritance()
 		""";
 		VerifyTree(expectations, setup, checkVSG: true);
 	}
-
-#if HAS_UNO
-	[TestMethod]
-	public async Task LegacyDO_StillSupports_TP_Injection()
-	{
-		var setup = new BehaviorSetup();
-		await UITestHelper.Load(setup, x => x.IsLoaded);
-
-		var button = setup.Content as Button ?? throw new Exception("button not found");
-		var grid = button.GetTemplateRoot() ?? throw new Exception("template root not found");
-		var collection = Interaction.GetBehaviors(grid) ?? throw new Exception("behavior collection not found");
-
-		var sut0 = collection.ElementAtOrDefault(0) as LegacyDOBehavior;
-
-		// Verify that "legacy DepObj"(DO from library built before templated-parent rework)
-		// 1. is simulated correctly via the "INotTemplatedParentProvider" blocker
-		Assert.IsNotInstanceOfType<ITemplatedParentProvider>(sut0, "sut0 shouldnt impl ITemplatedParentProvider");
-		// 2. still supports tp-injection.
-		Assert.AreEqual(button.Tag, sut0.TestValue, "sut0.TestValue template-binding failed");
-	}
-#endif
 }
 public partial class TemplatedParentTests // helper methods
 {

src/Uno.UI.RuntimeTests/Tests/Windows_UI_Xaml/Given_VisualStateManager.cs

@@ -1,7 +1,15 @@
+using System;
+using System.Linq;
 using System.Threading.Tasks;
 using Microsoft.UI.Xaml;
 using Microsoft.UI.Xaml.Controls;
+using Microsoft.UI.Xaml.Controls.Primitives;
 using Microsoft.UI.Xaml.Media;
+using Microsoft.UI.Xaml.Shapes;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using MUXControlsTestApp.Utilities;
+using Uno.Extensions;
+using Uno.UI.Extensions;
 using Uno.UI.RuntimeTests.Helpers;
 namespace Uno.UI.RuntimeTests.Tests.Windows_UI_Xaml;
 
@@ -30,4 +38,45 @@ public async Task When_Transition_Modifies_SubProperty_Of_Property_Set_By_Previo
 		await Task.Delay(1000);
 		Assert.AreEqual(Microsoft.UI.Colors.Red, ((SolidColorBrush)border.Background).Color);
 	}
+
+	[TestMethod]
+	public async Task SelectorItem_SelectedState()
+	{
+		var items = Enumerable.Range(0, 3).ToArray();
+		var setup = new GridView
+		{
+			ItemsSource = items,
+			SelectedItem = items.Last(),
+		};
+		await UITestHelper.Load(setup);
+
+		var container2 = setup.ContainerFromIndex(2) as GridViewItem ?? throw new Exception("Failed to retrieve container at index 2");
+
+		// check if the visual-state is set
+		var states = VisualStateHelper.GetCurrentVisualStateName(container2).ToArray();
+		Assert.IsTrue(states.Contains("Selected"), $"container2 is not in 'Selected' state: states={states.JoinBy(",")}");
+	}
+
+	[TestMethod]
+	public Task SelectorItem_MultiSelectState_GV() => SelectorItem_MultiSelectState_Impl<GridView>();
+
+	[TestMethod]
+	public Task SelectorItem_MultiSelectState_LV() => SelectorItem_MultiSelectState_Impl<ListView>();
+
+	public async Task SelectorItem_MultiSelectState_Impl<T>() where T : ListViewBase, new()
+	{
+		var items = Enumerable.Range(0, 3).ToArray();
+		var setup = new T
+		{
+			ItemsSource = items,
+			SelectionMode = ListViewSelectionMode.Multiple,
+		};
+		await UITestHelper.Load(setup);
+
+		var container2 = setup.ContainerFromIndex(2) as SelectorItem ?? throw new Exception("Failed to retrieve container at index 2");
+
+		// check if the visual-state is set
+		var states = VisualStateHelper.GetCurrentVisualStateName(container2).ToArray();
+		Assert.IsTrue(states.Contains("MultiSelectEnabled"), $"container2 is not in 'MultiSelectEnabled' state: states={states.JoinBy(",")}");
+	}
 }

src/Uno.UI.RuntimeTests/Tests/Windows_UI_Xaml_Controls/Given_Pivot.cs

@@ -12,6 +12,7 @@
 using static Private.Infrastructure.TestServices;
 using Uno.UI.Extensions;
 using Microsoft.UI.Xaml.Controls.Primitives;
+using Uno.UI.RuntimeTests.Helpers;
 
 namespace Uno.UI.RuntimeTests.Tests.Windows_UI_Xaml_Controls
 {
@@ -126,6 +127,24 @@ public async Task Check_Changing_SelectedItem_Affects_SelectedIndex()
 			SUT.SelectedItem.Should().Be(pivotItem2);
 		}
 
+		[TestMethod]
+		[RunsOnUIThread]
+		public async Task Pivot_Single_ItemContent_Visible()
+		{
+			var items = Enumerable.Range(0, 3).ToArray();
+			var setup = new Pivot
+			{
+				ItemsSource = items,
+				SelectedItem = items.Last(),
+			};
+			await UITestHelper.Load(setup);
+
+			var containers = items.Select((x, i) => setup.ContainerFromIndex(i)).OfType<PivotItem>().ToArray();
+
+			Assert.AreEqual(3, containers.Length, "Should have 3 containers");
+			Assert.AreEqual(1, containers.Count(x => x.Visibility == Visibility.Visible), "Only one PivotItem should be visible");
+		}
+
 		private class MyContext
 		{
 			public MyContext()

src/Uno.UI/AssemblyInfo.cs

@@ -16,6 +16,7 @@
 [assembly: InternalsVisibleTo("Uno.UI.Svg")]
 [assembly: InternalsVisibleTo("Uno.UI.Svg.Skia")]
 [assembly: InternalsVisibleTo("Uno.UI.XamlHost")]
+[assembly: InternalsVisibleTo("Uno.UI.Maps")]
 [assembly: InternalsVisibleTo("SamplesApp")]
 [assembly: InternalsVisibleTo("SamplesApp.Droid")]
 [assembly: InternalsVisibleTo("SamplesApp.macOS")]