[orca] Use already-calculated event window for mouse input events

[Joanmarie Diggs <joanied src gnome org>]

commit 2688d5a66aa1835eefdc206cf1cf4425087f6b90
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Fri Jul 12 11:53:57 2019 -0400

    Use already-calculated event window for mouse input events

 src/orca/scripts/default.py | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)
---
diff --git a/src/orca/scripts/default.py b/src/orca/scripts/default.py
index a0ac46010..8ab458b5b 100644
--- a/src/orca/scripts/default.py
+++ b/src/orca/scripts/default.py
@@ -2372,11 +2372,10 @@ class Script(script.Script):
         if not mouseEvent.pressed:
             return
 
-        window = self.utilities.activeWindow()
-        windowChanged = orca_state.activeWindow != window
+        windowChanged = orca_state.activeWindow != mouseEvent.window
         if windowChanged:
-            orca_state.activeWindow = window
-            orca.setLocusOfFocus(None, window, False)
+            orca_state.activeWindow = mouseEvent.window
+            orca.setLocusOfFocus(None, mouseEvent.window, False)
 
         self.presentationInterrupt()
         obj = mouseEvent.obj