Components can provide a default accessible name

Text component falls back to the content if accessibleLabel isn't set

Author: chrisglein

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

@@ -247,7 +247,8 @@ HRESULT __stdcall CompositionDynamicAutomationProvider::GetPropertyValue(PROPERT
     }
     case UIA_NamePropertyId: {
       pRetVal->vt = VT_BSTR;
-      auto wideName = ::Microsoft::Common::Unicode::Utf8ToUtf16(props->accessibilityLabel);
+      auto wideName = ::Microsoft::Common::Unicode::Utf8ToUtf16(
+        props->accessibilityLabel.empty() ? baseView->DefaultAccessibleName() : props->accessibilityLabel);
       pRetVal->bstrVal = SysAllocString(wideName.c_str());
       hr = pRetVal->bstrVal != nullptr ? S_OK : E_OUTOFMEMORY;
       break;

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

@@ -1072,7 +1072,10 @@ void CompositionBaseComponentView::updateAccessibilityProps(
       provider, UIA_IsKeyboardFocusablePropertyId, oldViewProps.focusable, newViewProps.focusable);
 
   winrt::Microsoft::ReactNative::implementation::UpdateUiaProperty(
-      provider, UIA_NamePropertyId, oldViewProps.accessibilityLabel, newViewProps.accessibilityLabel);
+    provider,
+    UIA_NamePropertyId,
+    oldViewProps.accessibilityLabel,
+    newViewProps.accessibilityLabel.empty() ? DefaultAccessibleName() : newViewProps.accessibilityLabel);
 
   winrt::Microsoft::ReactNative::implementation::UpdateUiaProperty(
       provider,
@@ -1219,6 +1222,10 @@ std::string CompositionBaseComponentView::DefaultControlType() const noexcept {
   return "group";
 }
 
+std::string CompositionBaseComponentView::DefaultAccessibleName() const noexcept {
+  return "";
+}
+
 CompositionViewComponentView::CompositionViewComponentView(
     const winrt::Microsoft::ReactNative::Composition::ICompositionContext &compContext,
     facebook::react::Tag tag)

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

@@ -67,6 +67,7 @@ struct CompositionBaseComponentView : public IComponentView,
   winrt::IInspectable EnsureUiaProvider() noexcept override;
 
   virtual std::string DefaultControlType() const noexcept;
+  virtual std::string DefaultAccessibleName() const noexcept;
 
  protected:
   std::array<winrt::Microsoft::ReactNative::Composition::SpriteVisual, SpecialBorderLayerCount>

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

@@ -46,14 +46,15 @@ void ParagraphComponentView::updateProps(
   if (oldViewProps.textAttributes.foregroundColor != newViewProps.textAttributes.foregroundColor) {
     m_requireRedraw = true;
   }
-  if (oldViewProps.textAttributes.opacity != newViewProps.textAttributes.opacity) {
+if (oldViewProps.textAttributes.opacity != newViewProps.textAttributes.opacity) {
     m_requireRedraw = true;
   }
 
   if (oldViewProps.textAttributes.alignment != newViewProps.textAttributes.alignment) {
     updateTextAlignment(newViewProps.textAttributes.alignment);
   }
 
+  updateAccessibilityProps(oldViewProps, newViewProps);
   updateBorderProps(oldViewProps, newViewProps);
 
   m_props = std::static_pointer_cast<facebook::react::ParagraphProps const>(props);
@@ -479,6 +480,10 @@ std::string ParagraphComponentView::DefaultControlType() const noexcept {
   return "text";
 }
 
+std::string ParagraphComponentView::DefaultAccessibleName() const noexcept {
+  return m_attributedStringBox.getValue().getString();
+}
+
 winrt::Microsoft::ReactNative::Composition::IVisual ParagraphComponentView::Visual() const noexcept {
   return m_visual;
 }

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

@@ -42,7 +42,8 @@ struct ParagraphComponentView : CompositionBaseComponentView {
   facebook::react::SharedTouchEventEmitter touchEventEmitterAtPoint(facebook::react::Point pt) noexcept override;
 
   winrt::Microsoft::ReactNative::Composition::IVisual Visual() const noexcept override;
-  virtual std::string DefaultControlType() const noexcept;
+  virtual std::string DefaultControlType() const noexcept override;
+  virtual std::string DefaultAccessibleName() const noexcept override;
 
  private:
   ParagraphComponentView(