Fix context action/tap gesture conflict when tap gesture is on nested…

… view

Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Bugzilla46363_2.cs

@@ -0,0 +1,127 @@
+using System.Collections.Generic;
+using Xamarin.Forms.CustomAttributes;
+using Xamarin.Forms.Internals;
+
+#if UITEST
+using Xamarin.Forms.Core.UITests;
+using Xamarin.UITest;
+using NUnit.Framework;
+#endif
+
+namespace Xamarin.Forms.Controls.Issues
+{
+#if UITEST
+	[Category(UITestCategories.Gestures)]
+	[Category(UITestCategories.ListView)]
+	[Category(UITestCategories.Cells)]
+	[Category(UITestCategories.ContextActions)]
+#endif
+
+	[Preserve(AllMembers = true)]
+	[Issue(IssueTracker.Bugzilla, 46363, "TapGestureRecognizer blocks List View Context Actions", 
+		PlatformAffected.Android, issueTestNumber: 1)]
+	public class Bugzilla46363_2 : TestContentPage
+	{
+		// This test case covers a scenario similar to Bugzilla46363, but with the TapGesture
+		// added to a nested StackLayout within the ViewCell template
+
+		const string Target = "Two";
+		const string ContextAction = "Context Action";
+		const string TapSuccess = "Tap Success";
+		const string TapFailure = "Tap command executed more than once";
+		const string ContextSuccess = "Context Menu Success";
+		const string Testing = "Testing";
+
+		static Command s_tapCommand;
+		static Command s_contextCommand;
+
+		protected override void Init()
+		{
+			var list = new List<string> { "One", Target, "Three", "Four" };
+
+			var lv = new ListView
+			{
+				ItemsSource = list,
+				ItemTemplate = new DataTemplate(typeof(_46363Template_2))
+			};
+
+			var instructions = new Label();
+			var result = new Label { Text = Testing };
+
+			s_tapCommand = new Command(() =>
+			{
+				if (result.Text == TapSuccess || result.Text == TapFailure)
+				{
+					// We want this test to fail if the tap command is executed more than once
+					result.Text = TapFailure;
+				}
+				else
+				{
+					result.Text = TapSuccess;
+				}
+			});
+
+			s_contextCommand = new Command(() =>
+			{
+				result.Text = ContextSuccess;
+			});
+
+			var layout = new StackLayout { VerticalOptions = LayoutOptions.Fill, HorizontalOptions = LayoutOptions.Fill };
+
+			layout.Children.Add(instructions);
+			layout.Children.Add(result);
+			layout.Children.Add(lv);
+
+			Content = layout;
+		}
+
+		[Preserve(AllMembers = true)]
+		class _46363Template_2 : ViewCell
+		{
+			public _46363Template_2()
+			{
+				var label = new Label();
+				label.SetBinding(Label.TextProperty, ".");
+
+				var innerStackLayout = new StackLayout { Children = { label }, Padding = new Thickness(4, 4, 4, 10) };
+				var outerStackLayout = new StackLayout { Children = { innerStackLayout } };
+
+				View = outerStackLayout;
+
+				ContextActions.Add(new MenuItem
+				{
+					Text = ContextAction,
+					Command = s_contextCommand
+				});
+
+				innerStackLayout.GestureRecognizers.Add(new TapGestureRecognizer
+				{
+					Command = s_tapCommand
+				});
+			}
+		}
+
+#if UITEST
+		[Test]
+		public void _46363_2_Tap_Succeeds()
+		{
+			RunningApp.WaitForElement(Testing);
+			RunningApp.Tap(Target);
+			RunningApp.WaitForElement(TapSuccess);
+
+			// Verify that we aren't also opening the context menu
+			RunningApp.WaitForNoElement(ContextAction);
+		}
+
+		[Test]
+		public void _46363_2_ContextAction_Succeeds()
+		{
+			RunningApp.WaitForElement(Testing);
+			RunningApp.ActivateContextMenu(Target);
+			RunningApp.WaitForElement(ContextAction);
+			RunningApp.Tap(ContextAction);
+			RunningApp.WaitForElement(ContextSuccess);
+		}
+#endif
+	}
+}

Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Xamarin.Forms.Controls.Issues.Shared.projitems

@@ -170,6 +170,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla45215.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla44500.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla46363.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Bugzilla46363_2.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla47548.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla52419.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla53834.cs" />

Xamarin.Forms.Platform.Android/Cells/ViewCellRenderer.cs

@@ -242,7 +242,13 @@ void UpdateWatchForLongPress()
 				// LongClick handling from happening. So we need to watch locally for LongPress and if we see it,
 				// trigger the LongClick manually.
 				_watchForLongPress = _viewCell.ContextActions.Count > 0 
-					&& vw.GestureRecognizers.Any(t => t is TapGestureRecognizer);
+					&& HasTapGestureRecognizers(vw);
+			}
+
+			static bool HasTapGestureRecognizers(View view)
+			{
+				return view.GestureRecognizers.Any(t => t is TapGestureRecognizer) 
+					|| view.LogicalChildren.OfType<View>().Any(HasTapGestureRecognizers);
 			}
 
 			void TriggerLongClick()