For particular window classes, do not bother checking if they have a …

…native UIA implementation, just assume they don't, as the implementation they have is rather broken. Currently this includes SysTreeview32 (because of the Windows Features treeview), WuDuiListView (because of the Windows Update available updates lists), ComboBox (because of the notification aria combo boxes, control panel). If these bugs are Fixed in Windows 7 before the real release, then perhaps we can take this code out.

source/UIAHandler.py

@@ -7,10 +7,13 @@
 import api
 import queueHandler
 import controlTypes
+import winUser
 import NVDAObjects.UIA
 import eventHandler
 from logHandler import log
 
+badUIAWindowClassNames=["SysTreeView32","WuDuiListView","ComboBox"]
+
 UIAControlTypesToNVDARoles={
 	UIA_ButtonControlTypeId:controlTypes.ROLE_BUTTON,
 	UIA_CalendarControlTypeId:controlTypes.ROLE_CALENDAR,
@@ -149,7 +152,11 @@ def isUIAWindow(self,hwnd):
 		now=time.time()
 		v=self.UIAWindowHandleCache.get(hwnd,None)
 		if not v or (now-v[1])>0.5:
-			isUIA=windll.UIAutomationCore.UiaHasServerSideProvider(hwnd)
+			windowClassName=winUser.getClassName(hwnd)
+			if windowClassName in badUIAWindowClassNames:
+				isUIA=False
+			else:
+				isUIA=windll.UIAutomationCore.UiaHasServerSideProvider(hwnd)
 			self.UIAWindowHandleCache[hwnd]=(isUIA,now)
 			return isUIA
 		return v[0]