[Fabric] Raising UIA Event if Toggle State Changes in Switch Component (#15023)

* Update Toggle State to Narrator

* Yarn Change

* Review Changes

* Review Changes 2.0

Author: vineethkuttan

change/react-native-windows-bcf77be5-d1cd-4b1a-9756-3de4607890e5.json

@@ -0,0 +1,7 @@
+{
+  "type": "prerelease",
+  "comment": "[Fabric] Raising UIA Event if Toggle State Changes in Switch Component",
+  "packageName": "react-native-windows",
+  "email": "[email protected]",
+  "dependentChangeType": "patch"
+}

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

@@ -9,6 +9,7 @@
 #include <Fabric/AbiViewProps.h>
 #include "CompositionDynamicAutomationProvider.h"
 #include "RootComponentView.h"
+#include "UiaHelpers.h"
 
 namespace winrt::Microsoft::ReactNative::Composition::implementation {
 
@@ -80,6 +81,16 @@ void SwitchComponentView::updateProps(
     m_visualUpdateRequired = true;
   }
 
+  if (oldViewProps.value != newViewProps.value) {
+    if (UiaClientsAreListening()) {
+      winrt::Microsoft::ReactNative::implementation::UpdateUiaProperty(
+          EnsureUiaProvider(),
+          UIA_ToggleToggleStatePropertyId,
+          oldViewProps.value ? ToggleState_On : ToggleState_Off,
+          newViewProps.value ? ToggleState_On : ToggleState_Off);
+    }
+  }
+
   Super::updateProps(props, oldProps);
 }
 

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

@@ -166,6 +166,15 @@ void UpdateUiaProperty(winrt::IInspectable provider, PROPERTYID propId, bool old
   UiaRaiseAutomationPropertyChangedEvent(spProviderSimple.get(), propId, CComVariant(oldValue), CComVariant(newValue));
 }
 
+void UpdateUiaProperty(winrt::IInspectable provider, PROPERTYID propId, int oldValue, int newValue) noexcept {
+  auto spProviderSimple = provider.try_as<IRawElementProviderSimple>();
+
+  if (spProviderSimple == nullptr || oldValue == newValue || !WasUiaPropertyAdvised(spProviderSimple, propId))
+    return;
+
+  UiaRaiseAutomationPropertyChangedEvent(spProviderSimple.get(), propId, CComVariant(oldValue), CComVariant(newValue));
+}
+
 void UpdateUiaProperty(
     winrt::IInspectable provider,
     PROPERTYID propId,

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

@@ -29,6 +29,12 @@ void UpdateUiaProperty(
     bool oldValue,
     bool newValue) noexcept;
 
+void UpdateUiaProperty(
+    winrt::Windows::Foundation::IInspectable provider,
+    PROPERTYID propId,
+    int oldValue,
+    int newValue) noexcept;
+
 void UpdateUiaProperty(
     winrt::Windows::Foundation::IInspectable provider,
     PROPERTYID propId,