[orca] Chromium: Hack around inability to ascend ancestry all the way to the frame

[Joanmarie Diggs <joanied src gnome org>]

commit a1459623d6d20b3716fda737ec37d04d2a83faac
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Tue Nov 13 16:19:41 2018 -0500

    Chromium: Hack around inability to ascend ancestry all the way to the frame

 src/orca/scripts/toolkits/Chromium/script.py          |  6 +++---
 .../scripts/toolkits/Chromium/script_utilities.py     | 19 +++++++++++++++++++
 2 files changed, 22 insertions(+), 3 deletions(-)
---
diff --git a/src/orca/scripts/toolkits/Chromium/script.py b/src/orca/scripts/toolkits/Chromium/script.py
index 2979cf02a..41985b974 100644
--- a/src/orca/scripts/toolkits/Chromium/script.py
+++ b/src/orca/scripts/toolkits/Chromium/script.py
@@ -276,9 +276,6 @@ class Script(web.Script):
     def onSelectedChanged(self, event):
         """Callback for object:state-changed:selected accessibility events."""
 
-        if super().onSelectedChanged(event):
-            return
-
         # Other apps and toolkits implement the selection interface, which is
         # what we use to present active-descendanty selection changes, leaving
         # state-changed:selected for notifications related to toggling the
@@ -294,6 +291,9 @@ class Script(web.Script):
             orca.setLocusOfFocus(event, event.source)
             return
 
+        if super().onSelectedChanged(event):
+            return
+
         msg = "CHROMIUM: Passing along event to default script"
         debug.println(debug.LEVEL_INFO, msg, True)
         default.Script.onSelectedChanged(self, event)
diff --git a/src/orca/scripts/toolkits/Chromium/script_utilities.py 
b/src/orca/scripts/toolkits/Chromium/script_utilities.py
index 41bcf4fb9..2220b7a1a 100644
--- a/src/orca/scripts/toolkits/Chromium/script_utilities.py
+++ b/src/orca/scripts/toolkits/Chromium/script_utilities.py
@@ -164,3 +164,22 @@ class Utilities(web.Utilities):
         msg = "CHROMIUM: HACK: Doing focus grab when setting caret on %s" % obj
         debug.println(debug.LEVEL_INFO, msg, True)
         return True
+
+    def topLevelObject(self, obj):
+        # HACK: Remove this once we can ascend ancestry and get top level
+        # object from within web content.
+        topLevel = super().topLevelObject(obj)
+        if not topLevel or topLevel.getRole() in self._topLevelRoles():
+            return topLevel
+
+        msg = "CHROMIUM: ERROR: Top level object for %s is %s" % (obj, topLevel)
+        debug.println(debug.LEVEL_INFO, msg, True)
+
+        if self.isDocument(topLevel) and orca_state.activeWindow \
+           and orca_state.activeWindow.getApplication() == self._script.app:
+            if pyatspi.findDescendant(topLevel, lambda x: x == topLevel):
+                msg = "CHROMIUM: HACK: Returning %s as top level" % orca_state.activeWindow
+                debug.println(debug.LEVEL_INFO, msg, True)
+                return orca_state.activeWindow
+
+        return topLevel