Check Z-Order for making content accessible on the lock screen.

source/NVDAObjects/__init__.py

@@ -30,6 +30,7 @@
 	TreeInterceptor,
 )
 import braille
+from utils.security import _isObjectAboveLockScreen
 import vision
 import globalPluginHandler
 import brailleInput
@@ -1433,3 +1434,11 @@ def getSelectedItemsCount(self,maxCount=2):
 		For performance, this method will only count up to the given maxCount number, and if there is one more above that, then sys.maxint is returned stating that many items are selected.
 		"""
 		return 0
+
+	#: Type definition for auto prop '_get_isAboveLockScreen'
+	isAboveLockScreen: bool
+
+	def _get_isAboveLockScreen(self) -> bool:
+		if not isWindowsLocked():
+			return True
+		return _isObjectAboveLockScreen(self)

source/api.py

@@ -237,7 +237,10 @@ def setReviewPosition(
 	@param isCaret: Whether the review position is changed due to caret following.
 	@param isMouse: Whether the review position is changed due to mouse following.
 	"""
-	if _isSecureObjectWhileLockScreenActivated(reviewPosition.obj):
+	reviewObj = reviewPosition.obj
+	if isinstance(reviewObj, treeInterceptorHandler.TreeInterceptor):
+		reviewObj = reviewObj.rootNVDAObject
+	if _isSecureObjectWhileLockScreenActivated(reviewObj):
 		return False
 	globalVars.reviewPosition=reviewPosition.copy()
 	globalVars.reviewPositionObj=reviewPosition.obj

source/baseObject.py

@@ -1,24 +1,39 @@
 # A part of NonVisual Desktop Access (NVDA)
-# Copyright (C) 2007-2020 NV Access Limited, Christopher Toth, Babbage B.V., Julien Cochuyt
+# Copyright (C) 2007-2022 NV Access Limited, Christopher Toth, Babbage B.V., Julien Cochuyt
 # This file is covered by the GNU General Public License.
 # See the file COPYING for more details.
 
 """Contains the base classes that many of NVDA's classes such as NVDAObjects, virtualBuffers, appModules, synthDrivers inherit from. These base classes provide such things as auto properties, and methods and properties for scripting and key binding.
 """
 
+from typing import (
+	Any,
+	Callable,
+	Optional,
+	Set,
+	Union,
+)
 import weakref
 import garbageHandler
 from logHandler import log
 from abc import ABCMeta, abstractproperty
 
+GetterReturnT = Any
+GetterMethodT = Callable[["AutoPropertyObject"], GetterReturnT]
+
+
 class Getter(object):
 
 	def __init__(self,fget, abstract=False):
 		self.fget=fget
 		if abstract:
 			self._abstract = self.__isabstractmethod__ = abstract
 
-	def __get__(self,instance,owner):
+	def __get__(
+			self,
+			instance: Union[Any, None, "AutoPropertyObject"],
+			owner,
+	) -> Union[GetterReturnT, "Getter"]:
 		if isinstance(self.fget, classmethod):
 			return self.fget.__get__(instance, owner)()
 		elif instance is None:
@@ -31,16 +46,22 @@ def setter(self,func):
 	def deleter(self,func):
 		return (abstractproperty if self._abstract else property)(fget=self.fget,fdel=func)
 
+
 class CachingGetter(Getter):
 
-	def __get__(self, instance, owner):
+	def __get__(
+			self,
+			instance: Union[Any, None, "AutoPropertyObject"],
+			owner,
+	) -> Union[GetterReturnT, "CachingGetter"]:
 		if isinstance(self.fget, classmethod):
 			log.warning("Class properties do not support caching")
 			return self.fget.__get__(instance, owner)()
 		elif instance is None:
 			return self
 		return instance._getPropertyViaCache(self.fget)
 
+
 class AutoPropertyType(ABCMeta):
 
 	def __init__(self,name,bases,dict):
@@ -125,6 +146,7 @@ class AutoPropertyObject(garbageHandler.TrackedObject, metaclass=AutoPropertyTyp
 	#: @type: bool
 	cachePropertiesByDefault = False
 
+	_propertyCache: Set[GetterMethodT]
 
 	def __new__(cls, *args, **kwargs):
 		self = super(AutoPropertyObject, cls).__new__(cls)
@@ -134,7 +156,7 @@ def __new__(cls, *args, **kwargs):
 		self.__instances[self]=None
 		return self
 
-	def _getPropertyViaCache(self,getterMethod=None):
+	def _getPropertyViaCache(self, getterMethod: Optional[GetterMethodT] = None) -> GetterReturnT:
 		if not getterMethod:
 			raise ValueError("getterMethod is None")
 		missing=False

source/core.py

@@ -601,7 +601,6 @@ def onEndSession(evt):
 		wx.CallAfter(audioDucking.initialize)
 
 	from winAPI.messageWindow import WindowMessage
-	from winAPI import sessionTracking
 	import winUser
 	# #3763: In wxPython 3, the class name of frame windows changed from wxWindowClassNR to wxWindowNR.
 	# NVDA uses the main frame to check for and quit another instance of NVDA.
@@ -630,27 +629,12 @@ def __init__(self, windowName=None):
 			self.orientationCoordsCache = (0,0)
 			self.handlePowerStatusChange()
 
-			# Call must be paired with a call to sessionTracking.unregister
-			if not sessionTracking.register(self.handle):
-				import utils.security
-				wx.CallAfter(utils.security.warnSessionLockStateUnknown)
-
-		def destroy(self):
-			"""
-			NVDA must unregister session tracking before destroying the message window.
-			"""
-			# Requires an active message window and a handle to unregister.
-			sessionTracking.unregister(self.handle)
-			super().destroy()
-
 		def windowProc(self, hwnd, msg, wParam, lParam):
 			post_windowMessageReceipt.notify(msg=msg, wParam=wParam, lParam=lParam)
 			if msg == WindowMessage.POWER_BROADCAST and wParam == self.PBT_APMPOWERSTATUSCHANGE:
 				self.handlePowerStatusChange()
 			elif msg == winUser.WM_DISPLAYCHANGE:
 				self.handleScreenOrientationChange(lParam)
-			elif msg == WindowMessage.WTS_SESSION_CHANGE:
-				sessionTracking.handleSessionChange(sessionTracking.WindowsTrackedSession(wParam), lParam)
 
 		def handleScreenOrientationChange(self, lParam):
 			# TODO: move to winAPI
@@ -809,7 +793,8 @@ def run(self):
 				mouseHandler.pumpAll()
 				braille.pumpAll()
 				vision.pumpAll()
-			except:
+				sessionTracking.pumpAll()
+			except Exception:
 				log.exception("errors in this core pump cycle")
 			baseObject.AutoPropertyObject.invalidateCaches()
 			watchdog.asleep()
@@ -832,6 +817,9 @@ def run(self):
 		log.debug("initializing updateCheck")
 		updateCheck.initialize()
 
+	from winAPI import sessionTracking
+	sessionTracking.initialize()
+
 	_TrackNVDAInitialization.markInitializationComplete()
 
 	log.info("NVDA initialized")

source/globalVars.py

@@ -20,6 +20,7 @@
 import typing
 
 if typing.TYPE_CHECKING:
+	import documentBase  # noqa: F401 used for type checking only
 	import NVDAObjects  # noqa: F401 used for type checking only
 
 
@@ -70,7 +71,7 @@ class DefaultAppArgs(argparse.Namespace):
 mouseOldY=None
 navigatorObject: typing.Optional['NVDAObjects.NVDAObject'] = None
 reviewPosition=None
-reviewPositionObj=None
+reviewPositionObj: typing.Optional["documentBase.TextContainerObject"] = None
 lastProgressValue=0
 appArgs = DefaultAppArgs()
 unknownAppArgs: typing.List[str] = []

source/nvda.pyw

@@ -350,13 +350,19 @@ if mutex is None:
 	sys.exit(1)
 
 
-if _isSecureDesktop():
+def _serviceDebugEnabled() -> bool:
 	import winreg
 	try:
 		k = winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, r"SOFTWARE\NVDA")
-		if not winreg.QueryValueEx(k, u"serviceDebug")[0]:
-			globalVars.appArgs.secure = True
+		if winreg.QueryValueEx(k, "serviceDebug")[0]:
+			return True
 	except WindowsError:
+		pass
+	return False
+
+
+if _isSecureDesktop():
+	if not _serviceDebugEnabled():
 		globalVars.appArgs.secure = True
 	globalVars.appArgs.changeScreenReaderFlag = False
 	globalVars.appArgs.minimal = True

source/textInfos/__init__.py

@@ -1,7 +1,7 @@
 # A part of NonVisual Desktop Access (NVDA)
 # This file is covered by the GNU General Public License.
 # See the file COPYING for more details.
-# Copyright (C) 2006-2021 NV Access Limited, Babbage B.V., Accessolutions, Julien Cochuyt
+# Copyright (C) 2006-2022 NV Access Limited, Babbage B.V., Accessolutions, Julien Cochuyt
 
 """Framework for accessing text content in widgets.
 The core component of this framework is the L{TextInfo} class.
@@ -31,8 +31,10 @@
 from logHandler import log
 
 if typing.TYPE_CHECKING:
+	import documentBase  # noqa: F401 used for type checking only
 	import NVDAObjects
 
+
 SpeechSequence = List[Union[Any, str]]
 
 class Field(dict):
@@ -307,7 +309,11 @@ class TextInfo(baseObject.AutoPropertyObject):
 	@type bookmark: L{Bookmark}
 	"""
 
-	def __init__(self,obj,position):
+	def __init__(
+			self,
+			obj: "documentBase.TextContainerObject",
+			position
+	):
 		"""Constructor.
 		Subclasses must extend this, calling the superclass method first.
 		@param position: The initial position of this range; one of the POSITION_* constants or a position object supported by the implementation.
@@ -338,9 +344,9 @@ def _set_end(self, otherEndpoint: "TextInfoEndpoint"):
 		self.end.moveTo(otherEndpoint)
 
 	#: Typing information for auto-property: _get_obj
-	obj: "NVDAObjects.NVDAObject"
+	obj: "documentBase.TextContainerObject"
 
-	def _get_obj(self) -> "NVDAObjects.NVDAObject":
+	def _get_obj(self) -> "documentBase.TextContainerObject":
 		"""The object containing the range of text being represented."""
 		return self._obj()
 

source/treeInterceptorHandler.py

@@ -1,10 +1,13 @@
-# treeInterceptorHandler.py
 # A part of NonVisual Desktop Access (NVDA)
-# Copyright (C) 2006-2020 NV Access Limited, Davy Kager, Accessolutions, Julien Cochuyt
+# Copyright (C) 2006-2022 NV Access Limited, Davy Kager, Accessolutions, Julien Cochuyt
 # This file is covered by the GNU General Public License.
 # See the file COPYING for more details.
 
-from typing import Optional, Dict
+from typing import (
+	TYPE_CHECKING,
+	Dict,
+	Optional,
+)
 
 from logHandler import log
 import baseObject
@@ -18,6 +21,10 @@
 from speech.types import SpeechSequence
 from controlTypes import OutputReason
 
+if TYPE_CHECKING:
+	import NVDAObjects
+
+
 runningTable=set()
 
 def getTreeInterceptor(obj):
@@ -84,12 +91,11 @@ class TreeInterceptor(baseObject.ScriptableObject):
 
 	shouldTrapNonCommandGestures=False #: If true then gestures that do not have a script and are not a command gesture should be trapped from going through to Windows.
 
-	def __init__(self, rootNVDAObject):
+	def __init__(self, rootNVDAObject: "NVDAObjects.NVDAObject"):
 		super(TreeInterceptor, self).__init__()
 		self._passThrough = False
 		#: The root object of the tree wherein events and scripts are intercepted.
-		#: @type: L{NVDAObjects.NVDAObject}
-		self.rootNVDAObject = rootNVDAObject
+		self.rootNVDAObject: "NVDAObjects.NVDAObject" = rootNVDAObject
 
 	def terminate(self):
 		"""Terminate this interceptor.