[orca] Filter out some chrome events when inferring live regions

[Joanmarie Diggs <joanied src gnome org>]

commit 64f8ea438b78ce9d54b5ee36c4a22609c8312322
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Sat Dec 7 15:04:33 2013 +0100

    Filter out some chrome events when inferring live regions

 src/orca/scripts/toolkits/Gecko/script.py |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)
---
diff --git a/src/orca/scripts/toolkits/Gecko/script.py b/src/orca/scripts/toolkits/Gecko/script.py
index c3f79ba..dbbc81e 100644
--- a/src/orca/scripts/toolkits/Gecko/script.py
+++ b/src/orca/scripts/toolkits/Gecko/script.py
@@ -2070,6 +2070,22 @@ class Script(default.Script):
         # events that are not in the document.  Unfortunately, this is an
         # expensive call.  Instead we will do some heuristics to filter out
         # chrome events with the least amount of IPC as possible.
+        chromeEventRoles = [pyatspi.ROLE_AUTOCOMPLETE,
+                            pyatspi.ROLE_FRAME,
+                            pyatspi.ROLE_STATUS_BAR,
+                            pyatspi.ROLE_TOOL_BAR]
+
+        role = event.source.getRole()
+        if role in chromeEventRoles:
+            return False
+
+        try:
+            childRole = event.any_data.getRole()
+        except:
+            pass
+        else:
+            if childRole in chromeEventRoles:
+                return False
 
         # event.type specific checks
         if event.type.startswith('object:children-changed'):