Accessibility and UIA Support for XAML Fabric implementation (#15466)

* accessibility and UIA support

* adding lint and formatting fix

* adding accessibility and UIA support for XAML fabric

* Change files

---------

Co-authored-by: Protik Biswas <protikbiswas100@microsoft.com>

Author: protikbiswas100

change/react-native-windows-0b14d2b4-ff2a-4e94-95f7-bc04edf1a1e4.json

@@ -0,0 +1,7 @@
+{
+  "type": "prerelease",
+  "comment": "adding accessibility and UIA support for XAML fabric",
+  "packageName": "react-native-windows",
+  "email": "protikbiswas100@microsoft.com",
+  "dependentChangeType": "patch"
+}

vnext/Microsoft.ReactNative/Fabric/Composition/ContentIslandComponentView.cpp

@@ -125,6 +125,27 @@ bool ContentIslandComponentView::focusable() const noexcept {
   return true;
 }
 
+facebook::react::Tag ContentIslandComponentView::hitTest(
+    facebook::react::Point pt,
+    facebook::react::Point &localPt,
+    bool ignorePointerEvents) const noexcept {
+  facebook::react::Point ptLocal{pt.x - m_layoutMetrics.frame.origin.x, pt.y - m_layoutMetrics.frame.origin.y};
+
+  // Check if the point is within the bounds of this ContentIslandComponentView.
+  // This ensures that hit tests correctly return this view's tag for UIA purposes,
+  // even when the actual content (XAML buttons, etc.) is hosted in the ContentIsland.
+  auto props = viewProps();
+  if ((ignorePointerEvents || props->pointerEvents == facebook::react::PointerEventsMode::Auto ||
+       props->pointerEvents == facebook::react::PointerEventsMode::BoxOnly) &&
+      ptLocal.x >= 0 && ptLocal.x <= m_layoutMetrics.frame.size.width && ptLocal.y >= 0 &&
+      ptLocal.y <= m_layoutMetrics.frame.size.height) {
+    localPt = ptLocal;
+    return Tag();
+  }
+
+  return -1;
+}
+
 // Helper to convert a FocusNavigationDirection to a FocusNavigationReason.
 winrt::Microsoft::UI::Input::FocusNavigationReason GetFocusNavigationReason(
     winrt::Microsoft::ReactNative::FocusNavigationDirection direction) noexcept {

vnext/Microsoft.ReactNative/Fabric/Composition/ContentIslandComponentView.h

@@ -40,6 +40,9 @@ struct ContentIslandComponentView : ContentIslandComponentViewT<ContentIslandCom
 
   bool focusable() const noexcept override;
 
+  facebook::react::Tag hitTest(facebook::react::Point pt, facebook::react::Point &localPt, bool ignorePointerEvents)
+      const noexcept override;
+
   winrt::Windows::Foundation::IInspectable EnsureUiaProvider() noexcept override;
 
   void onGotFocus(const winrt::Microsoft::ReactNative::Composition::Input::RoutedEventArgs &args) noexcept override;