Merge branch 'accessibility-views-effects' of https://github.com/xamarin/XamarinCommunityToolkit into accessibility-views-effects

Author: rachelkang

samples/XCT.Sample/Pages/Views/SemanticOrderViewPage.xaml

@@ -13,7 +13,7 @@
                     <Button x:Name="third" Text="Third" Margin="0,20" />
                     <Label x:Name="fourth" Text="Fourth" Margin="0,20" />
                     <Button x:Name="fifth" Text="Fifth and last" Margin="0,20" />
-                    <Label x:Name="first" Text="First" Margin="0,20" />
+                    <Button x:Name="first" Text="First" Margin="0,20" />
                 </StackLayout>
             </xct:SemanticOrderView>
         </StackLayout>

src/CommunityToolkit/Xamarin.CommunityToolkit/Effects/Semantic/SemanticEffectRouter.uwp.cs

@@ -6,6 +6,9 @@
 using Windows.UI.Xaml.Automation;
 using Windows.UI.Xaml.Automation.Peers;
 using Xamarin.CommunityToolkit.Effects;
+using Effects = Xamarin.CommunityToolkit.UWP.Effects;
+
+[assembly: Xamarin.Forms.ExportEffect(typeof(Effects.SemanticEffectRouter), nameof(SemanticEffectRouter))]
 
 namespace Xamarin.CommunityToolkit.UWP.Effects
 {
@@ -22,15 +25,18 @@ protected override void Update(FrameworkElement view, SemanticEffectRouter effec
 		{
 			var headingLevel = (AutomationHeadingLevel)((int)SemanticEffect.GetHeadingLevel(Element));
 			AutomationProperties.SetHeadingLevel(view, headingLevel);
-			AutomationProperties.SetName(view, SemanticEffect.GetDescription(Element));
-			AutomationProperties.SetHelpText(view, SemanticEffect.GetHint(Element));
+
+			AutomationProperties.SetName(view, SemanticEffect.GetDescription(Element) ?? string.Empty);
+			AutomationProperties.SetHelpText(view, SemanticEffect.GetHint(Element) ?? string.Empty);
 		}
 
 		protected override void OnElementPropertyChanged(PropertyChangedEventArgs args)
 		{
 			base.OnElementPropertyChanged(args);
 
-			if (args.PropertyName == SemanticEffect.HeadingLevelProperty.PropertyName)
+			if (args.PropertyName == SemanticEffect.HeadingLevelProperty.PropertyName ||
+				args.PropertyName == SemanticEffect.DescriptionProperty.PropertyName ||
+				args.PropertyName == SemanticEffect.HintProperty.PropertyName)
 			{
 				Update();
 			}