AX: Update the isolated tree when aria-selected changes

https://bugs.webkit.org/show_bug.cgi?id=240703

Reviewed by Chris Fleizach.

Fixes accessibility/selected-state-changed-notifications.html in
isolated tree mode.

* Source/WebCore/accessibility/AXObjectCache.cpp:
(WebCore::AXObjectCache::updateIsolatedTree):
* Source/WebCore/accessibility/isolatedtree/AXIsolatedTree.cpp:
(WebCore::AXIsolatedTree::updateNodeProperty):
* LayoutTests/accessibility/selected-state-changed-notifications.html:

Canonical link: https://commits.webkit.org/250810@main
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@294565 268f45cc-cd09-0410-ab3c-d52691b4dbfc

LayoutTests/accessibility/selected-state-changed-notifications.html

@@ -51,7 +51,7 @@
         axSelectable.press();
         setTimeout(async () => {
             await waitFor(() => {
-                return notificationCount == 1;
+                return notificationCount == 1 && axSelectable.isSelected;
             });
             shouldBeTrue("axSelectable.isSelected");
             if (platform == "ios")

Source/WebCore/accessibility/AXObjectCache.cpp

@@ -3446,6 +3446,9 @@ void AXObjectCache::updateIsolatedTree(const Vector<std::pair<RefPtr<AXCoreObjec
         case AXRequiredStatusChanged:
             tree->updateNodeProperty(*notification.first, AXPropertyName::IsRequired);
             break;
+        case AXSelectedStateChanged:
+            tree->updateNodeProperty(*notification.first, AXPropertyName::IsSelected);
+            break;
         case AXActiveDescendantChanged:
         case AXAriaRoleChanged:
         case AXElementBusyChanged:

Source/WebCore/accessibility/isolatedtree/AXIsolatedTree.cpp

@@ -356,6 +356,9 @@ void AXIsolatedTree::updateNodeProperty(AXCoreObject& axObject, AXPropertyName p
     case AXPropertyName::IsRequired:
         propertyMap.set(AXPropertyName::IsRequired, axObject.isRequired());
         break;
+    case AXPropertyName::IsSelected:
+        propertyMap.set(AXPropertyName::IsSelected, axObject.isSelected());
+        break;
     case AXPropertyName::ReadOnlyValue:
         propertyMap.set(AXPropertyName::ReadOnlyValue, axObject.readOnlyValue().isolatedCopy());
         break;