[orca] Web: Fix bogus assumption in allItemsSelected

[Joanmarie Diggs <joanied src gnome org>]

commit d2567f6823c5dee72bdf86dbb4f662f6648d53ea
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Fri Nov 19 14:53:03 2021 +0100

    Web: Fix bogus assumption in allItemsSelected
    
    allItemsSelected was assuming that the selected items in a container
    supporting the selection interface would be immediate children. That
    is not always the case, such as in ARIA listboxes with a group child
    and the Chromium datalist popup.

 src/orca/script_utilities.py | 10 ++++++++++
 1 file changed, 10 insertions(+)
---
diff --git a/src/orca/script_utilities.py b/src/orca/script_utilities.py
index ae32cec41..e6d7b8bd4 100644
--- a/src/orca/script_utilities.py
+++ b/src/orca/script_utilities.py
@@ -5770,7 +5770,17 @@ class Utilities:
         if role in [pyatspi.ROLE_COMBO_BOX, pyatspi.ROLE_MENU]:
             return False
 
+        selection = obj.querySelection()
+        if not selection.nSelectedChildren:
+            return False
+
         if self.selectedChildCount(obj) == obj.childCount:
+            # The selection interface gives us access to what is selected, which might
+            # not actually be a direct child.
+            child = selection.getSelectedChild(0)
+            if child not in obj:
+                return False
+
             msg = "INFO: All %i children believed to be selected" % obj.childCount
             debug.println(debug.LEVEL_INFO, msg, True)
             return True