[orca] Additional sanity checks for LibreOffice Calc dead accessibles (bug 672787)

[Joanmarie Diggs <joanied src gnome org>]

commit 6f057ddf5164944f0f40ce1cfca7cabce69df7ca
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Wed Mar 28 08:43:27 2012 -0400

    Additional sanity checks for LibreOffice Calc dead accessibles (bug 672787)

 src/orca/script_utilities.py                      |    5 ++++-
 src/orca/scripts/apps/soffice/script.py           |    5 ++++-
 src/orca/scripts/apps/soffice/speech_generator.py |    4 ++--
 3 files changed, 10 insertions(+), 4 deletions(-)
---
diff --git a/src/orca/script_utilities.py b/src/orca/script_utilities.py
index 05e2dad..2a1bf03 100644
--- a/src/orca/script_utilities.py
+++ b/src/orca/script_utilities.py
@@ -2935,7 +2935,10 @@ class Utilities:
         # Use ARIA "valuetext" attribute if present.  See
         # http://bugzilla.gnome.org/show_bug.cgi?id=552965
         #
-        attributes = obj.getAttributes()
+        try:
+            attributes = obj.getAttributes()
+        except:
+            return ""
         for attribute in attributes:
             if attribute.startswith("valuetext"):
                 return attribute[10:]
diff --git a/src/orca/scripts/apps/soffice/script.py b/src/orca/scripts/apps/soffice/script.py
index 16cc0e1..40803bc 100644
--- a/src/orca/scripts/apps/soffice/script.py
+++ b/src/orca/scripts/apps/soffice/script.py
@@ -1842,7 +1842,10 @@ class Script(default.Script):
         if not event.type.startswith('object:children-changed:add'):
             return
 
-        role = event.any_data.getRole()
+        try:
+            role = event.any_data.getRole()
+        except:
+            role = None
         if role == pyatspi.ROLE_TABLE:
             if self.isSpreadSheetCell(event.any_data, True):
                 orca.setLocusOfFocus(event, event.any_data)
diff --git a/src/orca/scripts/apps/soffice/speech_generator.py b/src/orca/scripts/apps/soffice/speech_generator.py
index 5ba72a7..6d26c07 100644
--- a/src/orca/scripts/apps/soffice/speech_generator.py
+++ b/src/orca/scripts/apps/soffice/speech_generator.py
@@ -348,8 +348,8 @@ class SpeechGenerator(speech_generator.SpeechGenerator):
         except NotImplementedError:
             parentTable = None
         index = self._script.utilities.cellIndex(obj)
-        if "lastColumn" in self._script.pointOfReference and \
-           self._script.pointOfReference["lastColumn"] != \
+        if parentTable and "lastColumn" in self._script.pointOfReference \
+           and self._script.pointOfReference["lastColumn"] != \
            parentTable.getColumnAtIndex(index):
             if table in self._script.dynamicColumnHeaders:
                 row = self._script.dynamicColumnHeaders[table]