[orca] Web: Eliminate some chattiness from ARIA page tabs

[Joanmarie Diggs <joanied src gnome org>]

commit 90a59eb05503252aa4260e5fa56511da5b86a155
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Thu Mar 24 12:46:27 2022 +0100

    Web: Eliminate some chattiness from ARIA page tabs
    
    The ARIA 'tab' role supports aria-expanded and nothing prohibits it
    from being applied in a single-selection tablist. If an author sets
    both aria-selected and aria-expanded on the newly-selected/active
    tab, we'll double-present that tab. Therefore, store the expanded
    state when selection changes so we can identify when it truly changed
    independent of selection.

 src/orca/scripts/default.py | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/orca/scripts/default.py b/src/orca/scripts/default.py
index f9f90126f..cf9084a58 100644
--- a/src/orca/scripts/default.py
+++ b/src/orca/scripts/default.py
@@ -845,6 +845,8 @@ class Script(script.Script):
             hash(obj), state.contains(pyatspi.STATE_CHECKED)
         self.pointOfReference['selectedChange'] = \
             hash(obj), state.contains(pyatspi.STATE_SELECTED)
+        self.pointOfReference['expandedChange'] = \
+            hash(obj), state.contains(pyatspi.STATE_EXPANDED)
 
     def locusOfFocusChanged(self, event, oldLocusOfFocus, newLocusOfFocus):
         """Called when the visual object with focus changes.