UI tests for InputTransparent and fixes for Android/Windows (#808)

* Set up automated UI tests for InputTransparent

* Pull in Adrian's UI tests from PR 483

* Fix bugs with box/label/image gestures passing through when not transparent

* Fix disabling of layouts on Windows; fix 44096 test for iOS/Windows;

* Automate the 53445 test

4 files changed, 82 insertions, 18 deletions

diff --git a/Xamarin.Forms.Platform.Android/Renderers/BoxRenderer.cs b/Xamarin.Forms.Platform.Android/Renderers/BoxRenderer.cs
index 380d4018..aa19d81c 100644
--- a/Xamarin.Forms.Platform.Android/Renderers/BoxRenderer.cs
+++ b/Xamarin.Forms.Platform.Android/Renderers/BoxRenderer.cs
@@ -5,7 +5,7 @@ namespace Xamarin.Forms.Platform.Android
 {
 	public class BoxRenderer : VisualElementRenderer<BoxView>
 	{
-		bool _isInViewCell;
+		readonly MotionEventHelper _motionEventHelper = new MotionEventHelper();
 
 		public BoxRenderer()
 		{
@@ -16,26 +16,15 @@ namespace Xamarin.Forms.Platform.Android
 		{
 			if (base.OnTouchEvent(e))
 				return true;
-			return !Element.InputTransparent && !_isInViewCell;
+
+			return _motionEventHelper.HandleMotionEvent(Parent);
 		}
 
 		protected override void OnElementChanged(ElementChangedEventArgs<BoxView> e)
 		{
 			base.OnElementChanged(e);
 
-			if (e.NewElement != null)
-			{
-				var parent = e.NewElement.Parent;
-				while (parent != null)
-				{
-					if (parent is ViewCell)
-					{
-						_isInViewCell = true;
-						break;
-					}
-					parent = parent.Parent;
-				}
-			}
+			_motionEventHelper.UpdateElement(e.NewElement);
 
 			UpdateBackgroundColor();
 		}
diff --git a/Xamarin.Forms.Platform.Android/Renderers/ImageRenderer.cs b/Xamarin.Forms.Platform.Android/Renderers/ImageRenderer.cs
index e18d4b95..fee05f1b 100644
--- a/Xamarin.Forms.Platform.Android/Renderers/ImageRenderer.cs
+++ b/Xamarin.Forms.Platform.Android/Renderers/ImageRenderer.cs
@@ -3,6 +3,7 @@ using System.ComponentModel;
 using System.IO;
 using System.Threading.Tasks;
 using Android.Graphics;
+using Android.Views;
 using AImageView = Android.Widget.ImageView;
 using Xamarin.Forms.Internals;
 
@@ -11,8 +12,7 @@ namespace Xamarin.Forms.Platform.Android
 	public class ImageRenderer : ViewRenderer<Image, AImageView>
 	{
 		bool _isDisposed;
-
-		IElementController ElementController => Element as IElementController;
+		readonly MotionEventHelper _motionEventHelper = new MotionEventHelper();
 
 		public ImageRenderer()
 		{
@@ -44,6 +44,8 @@ namespace Xamarin.Forms.Platform.Android
 				SetNativeControl(view);
 			}
 
+			_motionEventHelper.UpdateElement(e.NewElement);
+
 			UpdateBitmap(e.OldElement);
 			UpdateAspect();
 		}
@@ -117,5 +119,13 @@ namespace Xamarin.Forms.Platform.Android
 				((IVisualElementController)Element).NativeSizeChanged();
 			}
 		}
+
+		public override bool OnTouchEvent(MotionEvent e)
+		{
+			if (base.OnTouchEvent(e))
+				return true;
+
+			return _motionEventHelper.HandleMotionEvent(Parent);
+		}
 	}
 }
\ No newline at end of file
diff --git a/Xamarin.Forms.Platform.Android/Renderers/LabelRenderer.cs b/Xamarin.Forms.Platform.Android/Renderers/LabelRenderer.cs
index c544a239..ab1a6a35 100644
--- a/Xamarin.Forms.Platform.Android/Renderers/LabelRenderer.cs
+++ b/Xamarin.Forms.Platform.Android/Renderers/LabelRenderer.cs
@@ -4,8 +4,8 @@ using Android.Content.Res;
 using Android.Graphics;
 using Android.Text;
 using Android.Util;
+using Android.Views;
 using Android.Widget;
-using AColor = Android.Graphics.Color;
 
 namespace Xamarin.Forms.Platform.Android
 {
@@ -23,6 +23,8 @@ namespace Xamarin.Forms.Platform.Android
 		FormsTextView _view;
 		bool _wasFormatted;
 
+		readonly MotionEventHelper _motionEventHelper = new MotionEventHelper();
+
 		public LabelRenderer()
 		{
 			AutoPackage = false;
@@ -97,6 +99,8 @@ namespace Xamarin.Forms.Platform.Android
 				if (e.OldElement.HorizontalTextAlignment != e.NewElement.HorizontalTextAlignment || e.OldElement.VerticalTextAlignment != e.NewElement.VerticalTextAlignment)
 					UpdateGravity();
 			}
+
+			_motionEventHelper.UpdateElement(e.NewElement);
 		}
 
 		protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
@@ -217,5 +221,13 @@ namespace Xamarin.Forms.Platform.Android
 
 			_lastSizeRequest = null;
 		}
+
+		public override bool OnTouchEvent(MotionEvent e)
+		{
+			if (base.OnTouchEvent(e))
+				return true;
+
+			return _motionEventHelper.HandleMotionEvent(Parent);
+		}
 	}
 }
\ No newline at end of file
diff --git a/Xamarin.Forms.Platform.Android/Renderers/MotionEventHelper.cs b/Xamarin.Forms.Platform.Android/Renderers/MotionEventHelper.cs
new file mode 100644
index 00000000..4ed06d26
--- /dev/null
+++ b/Xamarin.Forms.Platform.Android/Renderers/MotionEventHelper.cs
@@ -0,0 +1,53 @@
+using Android.Views;
+
+namespace Xamarin.Forms.Platform.Android
+{
+	internal class MotionEventHelper
+	{
+		VisualElement _element;
+		bool _isInViewCell;
+
+		public bool HandleMotionEvent(IViewParent parent)
+		{
+			if (_isInViewCell || _element.InputTransparent)
+			{
+				return false;
+			}
+
+			var renderer = parent as Platform.DefaultRenderer;
+			if (renderer == null)
+			{
+				return false;
+			}
+
+			// Let the container know that we're "fake" handling this event
+			renderer.NotifyFakeHandling();
+
+			return true;
+		}
+
+		public void UpdateElement(VisualElement element)
+		{
+			_isInViewCell = false;
+			_element = element;
+
+			if (_element == null)
+			{
+				return;
+			}
+
+			// Determine whether this control is inside a ViewCell;
+			// we don't fake handle the events because ListView needs them for row selection
+			var parent = _element.Parent;
+			while (parent != null)
+			{
+				if (parent is ViewCell)
+				{
+					_isInViewCell = true;
+					break;
+				}
+				parent = parent.Parent;
+			}
+		}
+	}
+}
\ No newline at end of file