Backported Chrome omnibox fix from Orca.

src/cthulhu/ax_object.py

@@ -148,14 +148,42 @@ class AXObject:
         if not toolkit_name.startswith("qt"):
             return False
 
+        if not AXObject._can_reach_application(obj):
+            tokens = ["AXObject:", obj, "has broken ancestry. See qt bug 130116."]
+            debug.print_tokens(debug.LEVEL_INFO, tokens, True)
+            return True
+
+        return False
+
+    @staticmethod
+    def _can_reach_application(obj: Atspi.Accessible) -> bool:
+        """Returns True if obj's ancestry reaches the application."""
+
         reached_app = False
         parent = AXObject.get_parent(obj)
         while parent and not reached_app:
             reached_app = AXObject.get_role(parent) == Atspi.Role.APPLICATION
             parent = AXObject.get_parent(parent)
 
-        if not reached_app:
-            tokens = ["AXObject:", obj, "has broken ancestry. See qt bug 130116."]
+        return reached_app
+
+    @staticmethod
+    def has_broken_popup_ancestry(obj: Atspi.Accessible) -> bool:
+        """Returns True if obj is a popup item whose ancestry is broken."""
+
+        if obj is None or AXObject.is_dead(obj):
+            return False
+
+        # Chromium Omnibox popups can lose their path back to the frame after
+        # the popup is closed and reopened.
+        if not AXObject.get_toolkit_name(obj).startswith("chromium"):
+            return False
+
+        if AXObject.get_role(obj) != Atspi.Role.LIST_ITEM:
+            return False
+
+        if not AXObject._can_reach_application(obj):
+            tokens = ["AXObject:", obj, "has broken popup ancestry."]
             debug.print_tokens(debug.LEVEL_INFO, tokens, True)
             return True
 

src/cthulhu/focus_manager.py

@@ -348,6 +348,13 @@ class FocusManager:
             tokens.extend(["in", app])
         _log_tokens(tokens)
 
+        if frame is None and AXObject.has_broken_popup_ancestry(self._focus):
+            _log_tokens(
+                ["Not clearing active window; focus", self._focus, "is in popup with broken ancestry"],
+                "broken-popup-ancestry",
+            )
+            return
+
         if frame == self._window:
             _log("Setting active window to existing active window", "no-change")
         elif frame is None:

tests/test_chromium_omnibox_regressions.py

@@ -0,0 +1,68 @@
+import unittest
+from unittest import mock
+
+import gi
+gi.require_version("Atspi", "2.0")
+from gi.repository import Atspi
+
+from cthulhu import ax_object
+from cthulhu import cthulhu_state
+from cthulhu import focus_manager
+
+
+class ChromiumOmniboxRegressionTests(unittest.TestCase):
+    def tearDown(self):
+        cthulhu_state.activeWindow = None
+        cthulhu_state.locusOfFocus = None
+
+    def test_detects_chromium_popup_item_with_broken_ancestry(self):
+        popupItem = object()
+
+        with (
+            mock.patch.object(ax_object.AXObject, "is_dead", return_value=False),
+            mock.patch.object(ax_object.AXObject, "get_toolkit_name", return_value="chromium"),
+            mock.patch.object(ax_object.AXObject, "get_role", return_value=Atspi.Role.LIST_ITEM),
+            mock.patch.object(ax_object.AXObject, "get_parent", return_value=None),
+            mock.patch.object(ax_object.debug, "print_tokens"),
+        ):
+            self.assertTrue(ax_object.AXObject.has_broken_popup_ancestry(popupItem))
+
+    def test_ignores_chromium_popup_item_with_valid_ancestry(self):
+        popupItem = object()
+        parent = object()
+
+        def get_role(obj):
+            if obj is popupItem:
+                return Atspi.Role.LIST_ITEM
+            return Atspi.Role.APPLICATION
+
+        with (
+            mock.patch.object(ax_object.AXObject, "is_dead", return_value=False),
+            mock.patch.object(ax_object.AXObject, "get_toolkit_name", return_value="chromium"),
+            mock.patch.object(ax_object.AXObject, "get_role", side_effect=get_role),
+            mock.patch.object(ax_object.AXObject, "get_parent", side_effect=[parent, None]),
+        ):
+            self.assertFalse(ax_object.AXObject.has_broken_popup_ancestry(popupItem))
+
+    def test_preserves_active_window_when_chromium_popup_ancestry_is_broken(self):
+        activeWindow = object()
+        popupItem = object()
+        cthulhu_state.activeWindow = activeWindow
+        cthulhu_state.locusOfFocus = popupItem
+
+        controller = mock.Mock()
+        app = mock.Mock()
+        manager = None
+        with (
+            mock.patch.object(focus_manager.dbus_service, "get_remote_controller", return_value=controller),
+            mock.patch.object(focus_manager.AXObject, "has_broken_popup_ancestry", return_value=True),
+        ):
+            manager = focus_manager.FocusManager(app)
+            manager.set_active_window(None)
+
+        self.assertIs(manager.get_active_window(), activeWindow)
+        self.assertIs(cthulhu_state.activeWindow, activeWindow)
+
+
+if __name__ == "__main__":
+    unittest.main()