[orca/570658] Cache realActiveDescendant

[William Walker <wwalker src gnome org>]

commit a563bea99edff2b6a94d3a28b0b1fc4c5c866d74
Author: Willie Walker <william walker sun com>
Date:   Sat Jul 4 03:55:44 2009 -0400

    Cache realActiveDescendant

 src/orca/default.py |   20 +++++++++++++++-----
 1 files changed, 15 insertions(+), 5 deletions(-)
---
diff --git a/src/orca/default.py b/src/orca/default.py
index 0be44cd..06d84dd 100644
--- a/src/orca/default.py
+++ b/src/orca/default.py
@@ -77,6 +77,7 @@ class Script(script.Script):
     KEY_BINDING = 'keyBinding'
     NESTING_LEVEL = 'nestingLevel'
     NODE_LEVEL = 'nodeLevel'
+    REAL_ACTIVE_DESCENDANT = 'realActiveDescendant'
 
     def __init__(self, app):
         """Creates a new script for the given application.
@@ -6245,6 +6246,13 @@ class Script(script.Script):
         manages its descendants.
         """
 
+        try:
+            return self.generatorCache[self.REAL_ACTIVE_DESCENDANT][obj]
+        except:
+            if not self.generatorCache.has_key(self.REAL_ACTIVE_DESCENDANT):
+                self.generatorCache[self.REAL_ACTIVE_DESCENDANT] = {}
+            realActiveDescendant = None
+
         # If obj is a table cell and all of it's children are table cells
         # (probably cell renderers), then return the first child which has
         # a non zero length text string. If no such object is found, just
@@ -6264,7 +6272,7 @@ class Script(script.Script):
                         continue
                     else:
                         if text.getText(0, -1):
-                            return child
+                            realActiveDescendant = child
 
         # [[[TODO: WDW - this is an odd hacky thing I've somewhat drawn
         # from Gnopernicus.  The notion here is that we get an active
@@ -6281,10 +6289,12 @@ class Script(script.Script):
         # comment is here to remind us this is being done in poor taste
         # and we need to eventually clean up our act.]]]
         #
-        if obj and obj.childCount:
-            return obj[-1]
-        else:
-            return obj
+        if not realActiveDescendant and obj and obj.childCount:
+            realActiveDescendant = obj[-1]
+
+        self.generatorCache[self.REAL_ACTIVE_DESCENDANT][obj] = \
+            realActiveDescendant or obj
+        return self.generatorCache[self.REAL_ACTIVE_DESCENDANT][obj]
 
     def isDesiredFocusedItem(self, obj, rolesList):
         """Called to determine if the given object and it's hierarchy of