feat: Add support for CustomVisualStateManager

Author: dr1rrb

src/Uno.UI/Generated/3.0.0.0/Windows.UI.Xaml/VisualStateManager.cs

@@ -7,7 +7,7 @@ namespace Windows.UI.Xaml
 	#endif
 	public  partial class VisualStateManager : global::Windows.UI.Xaml.DependencyObject
 	{
-		#if __ANDROID__ || __IOS__ || NET461 || __WASM__ || __SKIA__ || __NETSTD_REFERENCE__ || __MACOS__
+		#if false
 		[global::Uno.NotImplemented("__ANDROID__", "__IOS__", "NET461", "__WASM__", "__SKIA__", "__NETSTD_REFERENCE__", "__MACOS__")]
 		public static global::Windows.UI.Xaml.DependencyProperty CustomVisualStateManagerProperty { get; } = 
 		Windows.UI.Xaml.DependencyProperty.RegisterAttached(
@@ -34,14 +34,14 @@ protected  void RaiseCurrentStateChanged( global::Windows.UI.Xaml.VisualStateGro
 		// Skipping already declared method Windows.UI.Xaml.VisualStateManager.GoToStateCore(Windows.UI.Xaml.Controls.Control, Windows.UI.Xaml.FrameworkElement, string, Windows.UI.Xaml.VisualStateGroup, Windows.UI.Xaml.VisualState, bool)
 		// Skipping already declared method Windows.UI.Xaml.VisualStateManager.GetVisualStateGroups(Windows.UI.Xaml.FrameworkElement)
 		// Forced skipping of method Windows.UI.Xaml.VisualStateManager.CustomVisualStateManagerProperty.get
-		#if __ANDROID__ || __IOS__ || NET461 || __WASM__ || __SKIA__ || __NETSTD_REFERENCE__ || __MACOS__
+		#if false
 		[global::Uno.NotImplemented("__ANDROID__", "__IOS__", "NET461", "__WASM__", "__SKIA__", "__NETSTD_REFERENCE__", "__MACOS__")]
 		public static global::Windows.UI.Xaml.VisualStateManager GetCustomVisualStateManager( global::Windows.UI.Xaml.FrameworkElement obj)
 		{
 			return (global::Windows.UI.Xaml.VisualStateManager)obj.GetValue(CustomVisualStateManagerProperty);
 		}
 		#endif
-		#if __ANDROID__ || __IOS__ || NET461 || __WASM__ || __SKIA__ || __NETSTD_REFERENCE__ || __MACOS__
+		#if false
 		[global::Uno.NotImplemented("__ANDROID__", "__IOS__", "NET461", "__WASM__", "__SKIA__", "__NETSTD_REFERENCE__", "__MACOS__")]
 		public static void SetCustomVisualStateManager( global::Windows.UI.Xaml.FrameworkElement obj,  global::Windows.UI.Xaml.VisualStateManager value)
 		{

src/Uno.UI/UI/Xaml/VisualStateManager.cs

@@ -98,6 +98,19 @@ internal static void SetVisualStateManager(IFrameworkElement obj, VisualStateMan
 
 		#endregion
 
+		#region CustomVisualStateManager Attached Property
+		public static DependencyProperty CustomVisualStateManagerProperty { get; } = DependencyProperty.RegisterAttached(
+				"CustomVisualStateManager", typeof(VisualStateManager),
+				typeof(VisualStateManager),
+				new FrameworkPropertyMetadata(default(VisualStateManager)));
+
+		public static VisualStateManager GetCustomVisualStateManager(FrameworkElement obj)
+			=> (VisualStateManager)obj.GetValue(CustomVisualStateManagerProperty);
+
+		public static void SetCustomVisualStateManager(FrameworkElement obj, VisualStateManager value)
+			=> obj.SetValue(CustomVisualStateManagerProperty, value);
+		#endregion
+
 		public static bool GoToState(Control control, string stateName, bool useTransitions)
 		{
 			var templateRoot = control.GetTemplateRoot();
@@ -147,12 +160,12 @@ public static bool GoToState(Control control, string stateName, bool useTransiti
 				return false;
 			}
 
-			var vsm = GetVisualStateManager(control);
+			var vsm = GetCustomVisualStateManager(control) ?? GetVisualStateManager(control);
 			if (vsm is null)
 			{
 				if (_log.IsEnabled(Microsoft.Extensions.Logging.LogLevel.Debug))
 				{
-					_log.DebugFormat("Failed to set state [{0}], there is no VisualStateManagr on [{1}]", stateName, control);
+					_log.DebugFormat("Failed to set state [{0}], there is no VisualStateManager on [{1}]", stateName, control);
 				}
 
 				return false;