[orca] Update Gedit spellcheck support for 3.18 and improve heuristic performance

[Joanmarie Diggs <joanied src gnome org>]

commit b3e221613a96ebb23932da78955a638fcdd0ce94
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Wed Oct 14 13:58:25 2015 -0400

    Update Gedit spellcheck support for 3.18 and improve heuristic performance

 src/orca/scripts/apps/gedit/spellcheck.py |   12 +++++++++---
 1 files changed, 9 insertions(+), 3 deletions(-)
---
diff --git a/src/orca/scripts/apps/gedit/spellcheck.py b/src/orca/scripts/apps/gedit/spellcheck.py
index 15d1f31..d85b821 100644
--- a/src/orca/scripts/apps/gedit/spellcheck.py
+++ b/src/orca/scripts/apps/gedit/spellcheck.py
@@ -36,11 +36,17 @@ class SpellCheck(spellcheck.SpellCheck):
         super(SpellCheck, self).__init__(script)
 
     def _isCandidateWindow(self, window):
-        if not (window and window.getRole() == pyatspi.ROLE_FRAME):
+        if not window:
             return False
 
-        isMenuBar = lambda x: x and x.getRole() == pyatspi.ROLE_MENU_BAR
-        if pyatspi.findDescendant(window, isMenuBar):
+        role = window.getRole()
+        if role == pyatspi.ROLE_DIALOG:
+            return True
+        if role != pyatspi.ROLE_FRAME:
+            return False
+
+        isSplitPane = lambda x: x and x.getRole() == pyatspi.ROLE_SPLIT_PANE
+        if pyatspi.findDescendant(window, isSplitPane):
             return False
 
         return True