[Catalyst] WebView does not display ContextFlyout on right-click - fix

src/Core/src/Handlers/View/ViewHandler.iOS.cs

@@ -42,12 +42,58 @@ internal static void MapContextFlyout(IElementHandler handler, IContextFlyoutEle
 				if (contextFlyoutContainer.ContextFlyout != null)
 				{
 					if (currentInteraction == null)
-						uiView.AddInteraction(new MauiUIContextMenuInteraction(handler));
+					{
+						if (uiView is WebKit.WKWebView webView)
+						{
+							var existingMaskView = webView.ViewWithTag(InterceptRightClickWebViewMaskView.MaskViewTag);
+							existingMaskView?.RemoveFromSuperview();
+
+							// If the view is a WKWebView, we need to intercept right-clicks
+							// to show the context menu, so we add a mask view that intercepts
+							// right-clicks and passes them to the context menu interaction.
+							var maskView = new InterceptRightClickWebViewMaskView(uiView.Bounds);
+							webView.AddSubview(maskView);
+							maskView.AddInteraction(new MauiUIContextMenuInteraction(handler));
+						}
+						else
+						{
+							uiView.AddInteraction(new MauiUIContextMenuInteraction(handler));
+						}
+					}
 				}
 				else if (currentInteraction != null)
 				{
 					uiView.RemoveInteraction(currentInteraction);
+
+					if (uiView is WebKit.WKWebView webView)
+					{
+						var existingMaskView = webView.ViewWithTag(InterceptRightClickWebViewMaskView.MaskViewTag);
+						existingMaskView?.RemoveFromSuperview();
+					}
+				}
+			}
+		}
+
+		class InterceptRightClickWebViewMaskView : PlatformView
+		{
+			public const int MaskViewTag = 9999;
+			public InterceptRightClickWebViewMaskView(CGRect frame) : base(frame)
+			{
+				Tag = MaskViewTag;
+				BackgroundColor = UIColor.Clear;
+				AutoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleHeight;
+				UserInteractionEnabled = true;
+			}
+
+			public override PlatformView? HitTest(CGPoint point, UIEvent? uievent)
+			{
+				if (uievent is UIEvent { Type: UIEventType.Touches } touch)
+				{
+					if (touch.ButtonMask.HasFlag(UIEventButtonMask.Secondary))
+						return base.HitTest(point, uievent);
 				}
+
+				return null;
 			}
 		}
 #endif