UIA: assume Windows 7 is in use and remove constants that are now par…

…t of current interface (#8422)

* UIA handler: just assume UIA is available, but keep the UIA enabled key. Re #8415.

UIA support in NVDA assumes Windows 7 or later. Because NVDA supports Windows 7 (SP1) and later, just assume UIA is available. However, for cases where UIA should be turned off, turn this on if UIA enabled key (from config) is on.

* Config: remove minWinVersion key for UIA. Re #8415.

As NVDA supports Windows 7 (SP1) and later, there's no need to check if min Windows version is 7 anymore, thus the coresponding key in Config manager/UIA section is no longer applicable.

* UIA constants: remove constants added in current interface that ships with NVDA. Re #8416.

In the old days, when UIA handler supported Windows 7 and 8.x (IUIA1 through IUIA3), there were constants that were not part of the interface file that came with NVDA. now that iUIA5 is supported (and in the future, IUIA6), it makes no sense to continue to include constants that are now part of the interface itself. Thus constants included in latest UIA interface are no longer part of NVDA's own UIA handler module (not all are gone, however).

* Update what's new

source/UIAHandler.py

@@ -1,10 +1,9 @@
 #UIAHandler.py
 #A part of NonVisual Desktop Access (NVDA)
-#Copyright (C) 2008-2016 NV Access Limited
+#Copyright (C) 2008-2018 NV Access Limited, Joseph Lee
 #This file is covered by the GNU General Public License.
 #See the file COPYING for more details.
 
-import winVersion
 from comtypes import COMError
 import config
 from logHandler import log
@@ -13,14 +12,13 @@
 isUIAAvailable=False
 
 if config.conf and config.conf["UIA"]["enabled"]:
-	winver=winVersion.winVersion.major+(winVersion.winVersion.minor/10.0)
-	if winver>=config.conf["UIA"]["minWindowsVersion"]:
-		try:
-			from _UIAHandler import *
-			isUIAAvailable=True
-		except ImportError:
-			log.debugWarning("Unable to import _UIAHandler",exc_info=True)
-			pass
+	# Because Windows 7 SP1 (NT 6.1) or later is supported, just assume UIA can be used unless told otherwise.
+	try:
+		from _UIAHandler import *
+		isUIAAvailable=True
+	except ImportError:
+		log.debugWarning("Unable to import _UIAHandler",exc_info=True)
+		pass
 
 def initialize():
 	global handler

source/_UIAHandler.py

@@ -26,22 +26,9 @@
 
 from comtypes.gen.UIAutomationClient import *
 
-#Some new win8 UIA constants that could be missing
-UIA_StyleIdAttributeId=40034
-UIA_AnnotationAnnotationTypeIdPropertyId=30113
-UIA_AnnotationTypesAttributeId=40031
-AnnotationType_SpellingError=60001
-UIA_AnnotationObjectsAttributeId=40032
-StyleId_Heading1=70001
-StyleId_Heading9=70009
+#Some newer UIA constants that could be missing
 ItemIndex_Property_GUID=GUID("{92A053DA-2969-4021-BF27-514CFC2E4A69}")
 ItemCount_Property_GUID=GUID("{ABBF5C45-5CCC-47b7-BB4E-87CB87BBD162}")
-UIA_FullDescriptionPropertyId=30159
-UIA_LevelPropertyId=30154
-UIA_PositionInSetPropertyId=30152
-UIA_SizeOfSetPropertyId=30153
-UIA_LocalizedLandmarkTypePropertyId=30158
-UIA_LandmarkTypePropertyId=30157
 
 HorizontalTextAlignment_Left=0
 HorizontalTextAlignment_Centered=1

source/config/configSpec.py

@@ -181,7 +181,6 @@
 	followMouse = boolean(default=False)
 
 [UIA]
-	minWindowsVersion = float(default=6.1)
 	enabled = boolean(default=true)
 	useInMSWordWhenAvailable = boolean(default=false)
 

user_docs/en/changes.t2t

@@ -45,6 +45,7 @@ What's New in NVDA
  - listUsbDevices now yields dictionaries with device information including hardwareID and devicePath.
  - Dictionaries yielded by listComPorts now also contain a usbID entry for COM ports with USB VID/PID information in their hardware ID.
 - Updated wxPython to 4.0.3. (#7077)
+- As NVDA now only supports Windows 7 SP1 and later, the key "minWindowsVersion" used to check if UIA should be enabled for a particular release of Windows has been removed. (#8422)
 
 
 = 2018.2 =