[orca] Minimize context presented during mouse review

[Joanmarie Diggs <joanied src gnome org>]

commit b7eec07de590abdd86ad4482678a2fcd205aff3d
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Tue Jun 26 16:18:53 2018 -0400

    Minimize context presented during mouse review

 src/orca/mouse_review.py | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)
---
diff --git a/src/orca/mouse_review.py b/src/orca/mouse_review.py
index 2c6669806..4caaedb66 100644
--- a/src/orca/mouse_review.py
+++ b/src/orca/mouse_review.py
@@ -154,6 +154,14 @@ class _ItemContext:
 
         return _StringContext(self._obj, self._script, string, start, end)
 
+    def _getContainer(self):
+        roles = [pyatspi.ROLE_DIALOG,
+                 pyatspi.ROLE_FRAME,
+                 pyatspi.ROLE_PAGE_TAB,
+                 pyatspi.ROLE_WINDOW]
+        isContainer = lambda x: x and x.getRole() in roles
+        return pyatspi.findAncestor(self._obj, isContainer)
+
     def present(self, prior):
         """Presents this context to the user."""
 
@@ -173,7 +181,8 @@ class _ItemContext:
             return True
 
         if self._obj and self._obj != prior._obj:
-            self._script.presentObject(self._obj)
+            priorObj = prior._obj or self._getContainer()
+            self._script.presentObject(self._obj, priorObj=priorObj)
 
         return True