feat!: templated-parent rework

build/PackageDiffIgnore.xml

@@ -1910,11 +1910,37 @@
 		</Fields>
 
 		<Properties>
+			<!-- BEGIN templated-parent rework -->
+
+			<!-- HorizontalGridView -->
+			<Member fullName="System\.Func`1&lt;Android\.Views\.View&gt; Uno\.UI\.Controls\.HorizontalGridView::(Item|Header|Footer)Template\(\)" reason="Not in UWP" isRegex="true" />
+
+			<!-- END templated-parent rework -->
 		</Properties>
 
 		<Methods>
 			<Member fullName="System.Void Microsoft.Web.WebView2.Core.CoreWebView2.set_DocumentTitle(System.String value)" reason="Does not exist in UWP" />
 
+			<!-- BEGIN templated-parent rework -->
+
+			<!-- DependencyObject (codegen for all descendants) -->
+			<Member fullName=".*DependencyProperty .*\.get_TemplatedParentProperty\(\)" reason="Not in UWP" isRegex="true" />
+			<Member fullName=".*DependencyObject .*\.get_TemplatedParent\(\)" reason="Not in UWP" isRegex="true" />
+			<Member fullName="System\.Void .*\.set_TemplatedParent\((Microsoft|Windows)\.UI\.Xaml\.DependencyObject value\)" reason="Not in UWP" isRegex="true" />
+
+			<!-- templates: FrameworkTemplate, DataTemplate, ControlTemplate, ItemsPanelTemplate -->
+			<Member fullName="(?&lt;ReturnType&gt;(Microsoft|Windows)\.UI\.Xaml\.(DataTemplate|Controls\.(ControlTemplate|ItemsPanelTemplate))) \k&lt;ReturnType&gt;\.op_Implicit\(System\.Func`1&lt;.*&gt; obj\)" reason="Not in UWP" isRegex="true" />
+			<Member fullName="System\.Func`1&lt;.*&gt; (?&lt;DeclaringType&gt;(Microsoft|Windows)\.UI\.Xaml\.(FrameworkTemplate|DataTemplate|Controls\.(ControlTemplate|ItemsPanelTemplate)))\.op_Implicit\(\k&lt;DeclaringType&gt; obj\)" reason="Not in UWP" isRegex="true" />
+
+			<!-- HorizontalGridView -->
+			<Member fullName="System\.Func`1&lt;Android\.Views\.View&gt; Uno\.UI\.Controls\.HorizontalGridView\.get_(Item|Header|Footer)Template\(\)" reason="Not in UWP" isRegex="true" />
+			<Member fullName="System\.Void Uno\.UI\.Controls\.HorizontalGridView\.set_(Item|Header|Footer)Template\(System\.Func`1&lt;Android\.Views\.View&gt; value\)" reason="Not in UWP" isRegex="true" />
+
+			<!-- ViewExtensions -->
+			<Member fullName="System\.String Uno\.UI\.Extensions\.ViewExtensions\.TreeGraph\((?&lt;_View&gt;.+) reference, System\.Func`2&lt;\k&lt;_View&gt;,System\.String&gt; describe\)" isRegex="true" reason="Not in UWP" />
+
+			<!-- END templated-parent rework -->
+
 			<!-- BEGIN ComboBox.IsEditable -->
 			<Member fullName="System.Void Windows.UI.Xaml.Controls.Primitives.Selector.SetFocusedItem(System.Int32 index, System.Boolean shouldScrollIntoView, System.Boolean forceFocus, Windows.UI.Xaml.FocusState focusState, System.Boolean animateIfBringIntoView)" reason="Does not exist in UWP" />
 			<Member fullName="System.Void Windows.UI.Xaml.Controls.Primitives.Selector.SetFocusedItem(System.Int32 index, System.Boolean shouldScrollIntoView, System.Boolean forceFocus, Windows.UI.Xaml.FocusState focusState, System.Boolean animateIfBringIntoView, Windows.UI.Xaml.Input.FocusNavigationDirection focusNavigationDirection)" reason="Does not exist in UWP" />

src/SourceGenerators/System.Xaml.Tests/Test/System.Xaml/XamlXmlReaderTest.cs

@@ -360,6 +360,7 @@ public void Read_GenericSimple()
 		[Test]
 		public void Read_GenericWithProperty()
 		{
+			const string not_win = "{http://uno.ui/not_win}";
 			var sequence = new SequenceItem[] {
 				new SequenceItem { NodeType = XamlNodeType.NamespaceDeclaration, },
 				new SequenceItem { NodeType = XamlNodeType.NamespaceDeclaration, },
@@ -382,16 +383,18 @@ public void Read_GenericWithProperty()
 				new SequenceItem { NodeType = XamlNodeType.EndMember, },
 
 				new SequenceItem { NodeType = XamlNodeType.StartMember, MemberType = "{http://schemas.microsoft.com/winfx/2006/xaml}_UnknownContent", },
-				new SequenceItem { NodeType = XamlNodeType.StartObject, TypeName = "{http://schemas.microsoft.com/winfx/2006/xaml/presentation}Style"},
+				new SequenceItem { NodeType = XamlNodeType.StartObject, TypeName = $"{not_win}Style"},
 				new SequenceItem { NodeType = XamlNodeType.StartMember, MemberType = "{http://schemas.microsoft.com/winfx/2006/xaml}Key", },
 				new SequenceItem { NodeType = XamlNodeType.Value, Value = "DefaultComboBoxItemStyle", },
 				new SequenceItem { NodeType = XamlNodeType.EndMember, },
-				new SequenceItem { NodeType = XamlNodeType.StartMember, MemberType = "{http://schemas.microsoft.com/winfx/2006/xaml/presentation}Style.OtherProperty", },
+				new SequenceItem { NodeType = XamlNodeType.StartMember, MemberType = $"{not_win}Style.OtherProperty", },
 				new SequenceItem { NodeType = XamlNodeType.Value, Value = "test", },
 				new SequenceItem { NodeType = XamlNodeType.EndMember, },
+#if false // XamlXmlReader fails to read any xmlns'd node/attribute with invalid uri (such as a guid or 'using:System.Somewhere')
 				new SequenceItem { NodeType = XamlNodeType.StartMember, MemberType = "{http://schemas.microsoft.com/winfx/2006/xaml/presentation}Style.TargetType", },
 				new SequenceItem { NodeType = XamlNodeType.Value, Value = "SelectorItem", },
 				new SequenceItem { NodeType = XamlNodeType.EndMember, },
+#endif
 				new SequenceItem { NodeType = XamlNodeType.EndObject, },
 				new SequenceItem { NodeType = XamlNodeType.EndMember, },
 				new SequenceItem { NodeType = XamlNodeType.EndObject, },
@@ -2507,9 +2510,30 @@ public void Bug680385 ()
 		}
 		#endregion
 
+		private string GetXml(string fileName)
+		{
+			var directory = Path.GetDirectoryName(new Uri(GetType().Assembly.CodeBase).LocalPath);
+			var path = Path.Combine(directory, "Test/XmlFiles", fileName);
+
+			return File.ReadAllText(path).Replace("System.Xaml_test_net_4_0", "Uno.Xaml.Tests");
+		}
+
+		private IEnumerable<(XamlNodeType, string, string, object, string)> ReadAllTokens(string fileName)
+		{
+			var r = GetReader(fileName);
+			int i = 0;
+			while (r.Read())
+			{
+				yield return (r.NodeType, r.Member?.ToString(), r.Member?.Name, r.Value, r.Type?.ToString());
+			}
+		}
+
 		private void ReadSequence(string fileName, IEnumerable<SequenceItem> sequence)
 		{
-			//ReadTest(fileName);
+#if DEBUG && false
+			var xml = GetXml(fileName);
+			var tokens = ReadAllTokens(fileName).ToArray();
+#endif
 
 			var r = GetReader(fileName);
 

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

@@ -143,6 +143,7 @@ internal partial class Inner : DependencyObject
 	 using System.Linq;
 	 using System.Collections.Generic;
 	 using System.Collections;
+	 using System.ComponentModel;
 	 using System.Diagnostics.CodeAnalysis;
 	 using Uno.Disposables;
 	 using System.Runtime.CompilerServices;
@@ -158,7 +159,7 @@ internal partial class Inner : DependencyObject
 	 partial class OuterClass
 	 {
 	 	[global::Microsoft.UI.Xaml.Data.Bindable]
-	 	partial class Inner : IDependencyObjectStoreProvider, IWeakReferenceProvider
+	 	partial class Inner : IDependencyObjectStoreProvider, ITemplatedParentProvider, IWeakReferenceProvider
 	 	{
 	 		private DependencyObjectStore __storeBackingField;
 	 		public global::Windows.UI.Core.CoreDispatcher Dispatcher => global::Windows.ApplicationModel.Core.CoreApplication.MainView.Dispatcher;
@@ -169,7 +170,7 @@ private DependencyObjectStore __Store
 	 			{
 	 				if(__storeBackingField == null)
 	 				{
-	 					__storeBackingField = new DependencyObjectStore(this, DataContextProperty, TemplatedParentProperty);
+	 					__storeBackingField = new DependencyObjectStore(this, DataContextProperty);
 	 					__InitializeBinder();
 	 				}
 	 				return __storeBackingField;
@@ -184,6 +185,28 @@ 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;
@@ -266,31 +289,32 @@ internal protected virtual void OnDataContextChanged(DependencyPropertyChangedEv
 
 	 		#endregion
 
-	 		#region TemplatedParent DependencyProperty
+	 		#region TemplatedParent DependencyProperty // legacy api, should no longer to be used.
 
-	 		public DependencyObject TemplatedParent
+	 		[EditorBrowsable(EditorBrowsableState.Never)]public DependencyObject TemplatedParent
 	 		{
 	 			get => (DependencyObject)GetValue(TemplatedParentProperty);
 	 			set => SetValue(TemplatedParentProperty, value);
 	 		}
 
 	 		// Using a DependencyProperty as the backing store for TemplatedParent.  This enables animation, styling, binding, etc...
+	 		[EditorBrowsable(EditorBrowsableState.Never)]
 	 		public static DependencyProperty TemplatedParentProperty { get ; } =
 	 			DependencyProperty.Register(
 	 				name: nameof(TemplatedParent),
 	 				propertyType: typeof(DependencyObject),
 	 				ownerType: typeof(Inner),
 	 				typeMetadata: new FrameworkPropertyMetadata(
 	 					defaultValue: null,
-	 					options: FrameworkPropertyMetadataOptions.Inherits | FrameworkPropertyMetadataOptions.ValueDoesNotInheritDataContext | FrameworkPropertyMetadataOptions.WeakStorage,
+	 					options: /*FrameworkPropertyMetadataOptions.Inherits | */FrameworkPropertyMetadataOptions.ValueDoesNotInheritDataContext | FrameworkPropertyMetadataOptions.WeakStorage,
 	 					propertyChangedCallback: (s, e) => ((Inner)s).OnTemplatedParentChanged(e)
 	 				)
 	 			);
 
 
+	 		[EditorBrowsable(EditorBrowsableState.Never)]
 	 		internal protected virtual void OnTemplatedParentChanged(DependencyPropertyChangedEventArgs e)
 	 		{
-	 			__Store.SetTemplatedParent(e.NewValue as FrameworkElement);
 	 			OnTemplatedParentChangedPartial(e);
 	 		}
 
@@ -321,6 +345,7 @@ public void SetBindingValue(object value, [CallerMemberName] string propertyName
 
 	 		partial void OnDataContextChangedPartial(DependencyPropertyChangedEventArgs e);
 
+	 		[EditorBrowsable(EditorBrowsableState.Never)]
 	 		partial void OnTemplatedParentChangedPartial(DependencyPropertyChangedEventArgs e);
 
 	 		public global::Microsoft.UI.Xaml.Data.BindingExpression GetBindingExpression(DependencyProperty dependencyProperty)

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

@@ -111,7 +111,7 @@ private void InitializeComponent()
 			"MyItemTemplate"
 			] = 
 			new global::Uno.UI.Xaml.WeakResourceInitializer(this, __ResourceOwner_1 => 
-				new global::Microsoft.UI.Xaml.DataTemplate(__ResourceOwner_1 , __owner => 				((I_MainPage_d6cd66944958ced0c513e0a04797b51d_TestReproMainPageSC0)global::Uno.UI.Helpers.TypeMappings.CreateInstance<_MainPage_d6cd66944958ced0c513e0a04797b51d_TestReproMainPageSC0>()).Build(__owner)
+				new global::Microsoft.UI.Xaml.DataTemplate(__ResourceOwner_1, (__owner) => 				((I_MainPage_d6cd66944958ced0c513e0a04797b51d_TestReproMainPageSC0)global::Uno.UI.Helpers.TypeMappings.CreateInstance<_MainPage_d6cd66944958ced0c513e0a04797b51d_TestReproMainPageSC0>()).Build(__owner)
 				)				.GenericApply(__that, __nameScope, ((c6, __that, __nameScope) => 
 				{
 					global::Uno.UI.Helpers.MarkupHelper.SetElementProperty(c6, "OriginalSourceLocation", "file:///C:/Project/0/MainPage.xaml#L13:6");
@@ -125,7 +125,7 @@ private void InitializeComponent()
 			{
 				IsParsing = true,
 				Name = "TheListView",
-				HeaderTemplate = 				new global::Microsoft.UI.Xaml.DataTemplate(this , __owner => 				((I_MainPage_d6cd66944958ced0c513e0a04797b51d_TestReproMainPageSC1)global::Uno.UI.Helpers.TypeMappings.CreateInstance<_MainPage_d6cd66944958ced0c513e0a04797b51d_TestReproMainPageSC1>()).Build(__owner)
+				HeaderTemplate = 				new global::Microsoft.UI.Xaml.DataTemplate(this, (__owner) => 				((I_MainPage_d6cd66944958ced0c513e0a04797b51d_TestReproMainPageSC1)global::Uno.UI.Helpers.TypeMappings.CreateInstance<_MainPage_d6cd66944958ced0c513e0a04797b51d_TestReproMainPageSC1>()).Build(__owner)
 				)				.GenericApply(__that, __nameScope, ((c7, __that, __nameScope) => 
 				{
 					global::Uno.UI.Helpers.MarkupHelper.SetElementProperty(c7, "OriginalSourceLocation", "file:///C:/Project/0/MainPage.xaml#L42:8");

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

@@ -111,7 +111,7 @@ private void InitializeComponent()
 			"MyItemTemplate"
 			] = 
 			new global::Uno.UI.Xaml.WeakResourceInitializer(this, __ResourceOwner_1 => 
-				new global::Microsoft.UI.Xaml.DataTemplate(__ResourceOwner_1 , __owner => 				((I_MainPage_d6cd66944958ced0c513e0a04797b51d_TestReproMainPageSC0)global::Uno.UI.Helpers.TypeMappings.CreateInstance<_MainPage_d6cd66944958ced0c513e0a04797b51d_TestReproMainPageSC0>()).Build(__owner)
+				new global::Microsoft.UI.Xaml.DataTemplate(__ResourceOwner_1, (__owner) => 				((I_MainPage_d6cd66944958ced0c513e0a04797b51d_TestReproMainPageSC0)global::Uno.UI.Helpers.TypeMappings.CreateInstance<_MainPage_d6cd66944958ced0c513e0a04797b51d_TestReproMainPageSC0>()).Build(__owner)
 				)				.GenericApply(__that, __nameScope, ((c6, __that, __nameScope) => 
 				{
 					global::Uno.UI.Helpers.MarkupHelper.SetElementProperty(c6, "OriginalSourceLocation", "file:///C:/Project/0/MainPage.xaml#L13:6");

src/SourceGenerators/Uno.UI.SourceGenerators.Tests/XamlCodeGeneratorTests/Out/TDBMIDTIRD/XamlCodeGenerator_MyResourceDictionary_92716e07ff456818f6d4125e055d4d57.cs

@@ -46,7 +46,7 @@ public void InitializeComponent()
 			"myTemplate"
 			] = 
 			new global::Uno.UI.Xaml.WeakResourceInitializer(this, __ResourceOwner_1 => 
-				new global::Microsoft.UI.Xaml.DataTemplate(__ResourceOwner_1 , __owner => 				new _MyResourceDictionary_92716e07ff456818f6d4125e055d4d57_TestReproMyResourceDictionarySC0().Build(__owner)
+				new global::Microsoft.UI.Xaml.DataTemplate(__ResourceOwner_1, (__owner) => 				new _MyResourceDictionary_92716e07ff456818f6d4125e055d4d57_TestReproMyResourceDictionarySC0().Build(__owner)
 				)			)
 			;
 		}
@@ -178,7 +178,7 @@ public ResourceDictionarySingleton__MyResourceDictionary_92716e07ff456818f6d4125
 
 			// Method for resource myTemplate 
 			private object Get_1(object __ResourceOwner_1) =>
-				new global::Microsoft.UI.Xaml.DataTemplate(__ResourceOwner_1 , __owner => 				new __Resources._MyResourceDictionary_92716e07ff456818f6d4125e055d4d57_MyResourceDictionaryRDSC1().Build(__owner)
+				new global::Microsoft.UI.Xaml.DataTemplate(__ResourceOwner_1, (__owner) => 				new __Resources._MyResourceDictionary_92716e07ff456818f6d4125e055d4d57_MyResourceDictionaryRDSC1().Build(__owner)
 				)				;
 
 			private global::Microsoft.UI.Xaml.ResourceDictionary _MyResourceDictionary_92716e07ff456818f6d4125e055d4d57_ResourceDictionary;
@@ -197,7 +197,7 @@ private object Get_1(object __ResourceOwner_1) =>
 							"myTemplate"
 							] = 
 							new global::Uno.UI.Xaml.WeakResourceInitializer(this, __ResourceOwner_1 => 
-								new global::Microsoft.UI.Xaml.DataTemplate(__ResourceOwner_1 , __owner => 								new __Resources._MyResourceDictionary_92716e07ff456818f6d4125e055d4d57_MyResourceDictionaryRDSC2().Build(__owner)
+								new global::Microsoft.UI.Xaml.DataTemplate(__ResourceOwner_1, (__owner) => 								new __Resources._MyResourceDictionary_92716e07ff456818f6d4125e055d4d57_MyResourceDictionaryRDSC2().Build(__owner)
 								)							)
 							,
 						}

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

@@ -99,7 +99,7 @@ private void InitializeComponent()
 							{
 								IsParsing = true,
 								Name = "inner2",
-								Template = 								new global::Microsoft.UI.Xaml.Controls.ControlTemplate(this , __owner => 								new _MainPage_d6cd66944958ced0c513e0a04797b51d_TestReproMainPageSC0().Build(__owner)
+								Template = 								new global::Microsoft.UI.Xaml.Controls.ControlTemplate(this, (__owner) => 								new _MainPage_d6cd66944958ced0c513e0a04797b51d_TestReproMainPageSC0().Build(__owner)
 								)								,
 								// Source 0\MainPage.xaml (Line 15:5)
 							}

src/SourceGenerators/Uno.UI.SourceGenerators.Tests/XamlCodeGeneratorTests/Out/WBENIT/XamlCodeGenerator_Binding_ElementName_In_Template_66bf0a54f1801c397a6fa4930a237eca.cs

@@ -59,7 +59,7 @@ private void InitializeComponent()
 						IsParsing = true,
 						Name = "topLevel",
 						Tag = @"42",
-						ContentTemplate = 						new global::Microsoft.UI.Xaml.DataTemplate(this , __owner => 						new _Binding_ElementName_In_Template_66bf0a54f1801c397a6fa4930a237eca_UnoUITestsWindows_UI_Xaml_DataBindingTestsControlsBinding_ElementName_In_TemplateSC0().Build(__owner)
+						ContentTemplate = 						new global::Microsoft.UI.Xaml.DataTemplate(this, (__owner) => 						new _Binding_ElementName_In_Template_66bf0a54f1801c397a6fa4930a237eca_UnoUITestsWindows_UI_Xaml_DataBindingTestsControlsBinding_ElementName_In_TemplateSC0().Build(__owner)
 						)						,
 						// Source 0\Binding_ElementName_In_Template.xaml (Line 11:4)
 					}