def _get_isAlive(self): if not winUser.isWindow(self.rootNVDAObject.windowHandle): return False try: self.rootNVDAObject.UIAElement.currentProviderDescription except COMError: return False return True
def _get_isAlive(self):
if not winUser.isWindow(self.rootNVDAObject.windowHandle):
return False
try:
return self.rootNVDAObject.excelWorksheetObject.name==self.rootNVDAObject.excelApplicationObject.activeSheet.name
except (COMError,AttributeError,NameError):
log.debugWarning("could not compare sheet names",exc_info=True)
return False
def _get_isAlive(self): if self.isLoading: return True root=self.rootNVDAObject if not root: return False if not winUser.isWindow(root.windowHandle) or root.role == controlTypes.ROLE_UNKNOWN: return False return True
def _get_isAlive(self): if self.isLoading: return True root=self.rootNVDAObject if not root: return False states=root.states if not winUser.isWindow(root.windowHandle) or controlTypes.STATE_DEFUNCT in states or controlTypes.STATE_READONLY not in states: return False return True
def winEventCallback(handle,eventID,window,objectID,childID,threadID,timestamp):
try:
#Ignore all object IDs from alert onwards (sound, nativeom etc) as we don't support them
if objectID<=winUser.OBJID_ALERT:
return
#Ignore all locationChange events except ones for the caret
if eventID==winUser.EVENT_OBJECT_LOCATIONCHANGE and objectID!=winUser.OBJID_CARET:
return
if eventID==winUser.EVENT_OBJECT_DESTROY:
processDestroyWinEvent(window,objectID,childID)
return
#Change window objIDs to client objIDs for better reporting of objects
if (objectID==0) and (childID==0):
objectID=winUser.OBJID_CLIENT
#Ignore events with invalid window handles
isWindow = winUser.isWindow(window) if window else 0
if window==0 or (not isWindow and eventID in (winUser.EVENT_SYSTEM_SWITCHSTART,winUser.EVENT_SYSTEM_SWITCHEND,winUser.EVENT_SYSTEM_MENUEND,winUser.EVENT_SYSTEM_MENUPOPUPEND)):
window=winUser.getDesktopWindow()
elif not isWindow:
return
if childID<0:
tempWindow=window
while tempWindow and not winUser.getWindowStyle(tempWindow)&winUser.WS_POPUP and winUser.getClassName(tempWindow)=="MozillaWindowClass":
tempWindow=winUser.getAncestor(tempWindow,winUser.GA_PARENT)
if tempWindow and winUser.getClassName(tempWindow).startswith('Mozilla'):
window=tempWindow
windowClassName=winUser.getClassName(window)
#At the moment we can't handle show, hide or reorder events on Mozilla Firefox Location bar,as there are just too many of them
#Ignore show, hide and reorder on MozillaDropShadowWindowClass windows.
if windowClassName.startswith('Mozilla') and eventID in (winUser.EVENT_OBJECT_SHOW,winUser.EVENT_OBJECT_HIDE,winUser.EVENT_OBJECT_REORDER) and childID<0:
#Mozilla Gecko can sometimes fire win events on a catch-all window which isn't really the real window
#Move up the ancestry to find the real mozilla Window and use that
if winUser.getClassName(window)=='MozillaDropShadowWindowClass':
return
if eventID==winUser.EVENT_SYSTEM_FOREGROUND:
#We never want to see foreground events for the Program Manager or Shell (task bar)
if windowClassName in ("Progman","Shell_TrayWnd"):
return
# #3831: Event handling can be deferred if Windows takes a while to change the foreground window.
# See pumpAll for details.
global _deferUntilForegroundWindow,_foregroundDefers
_deferUntilForegroundWindow=window
_foregroundDefers=0
if windowClassName=="MSNHiddenWindowClass":
# HACK: Events get fired by this window in Windows Live Messenger 2009 when it starts.
# If we send a WM_NULL to this window at this point (which happens in accessibleObjectFromEvent), Messenger will silently exit (#677).
# Therefore, completely ignore these events, which is useless to us anyway.
return
if winEventLimiter.addEvent(eventID,window,objectID,childID,threadID):
core.requestPump()
except:
log.error("winEventCallback", exc_info=True)
def _get_isAlive(self): if self.isLoading: return True root=self.rootNVDAObject if not root: return False if not winUser.isWindow(root.windowHandle): return False try: isDefunct=bool(root.IAccessibleObject.states&IAccessibleHandler.IA2_STATE_DEFUNCT) except COMError: # If IAccessible2 states can not be fetched at all, defunct should be assumed as the object has clearly been disconnected or is dead isDefunct=True return not isDefunct
def _get_isAlive(self): if self.isLoading: return True root=self.rootNVDAObject if not root: return False if not winUser.isWindow(root.windowHandle) or controlTypes.STATE_DEFUNCT in root.states: return False try: if not NVDAObjects.IAccessible.getNVDAObjectFromEvent(root.windowHandle,winUser.OBJID_CLIENT,root.IA2UniqueID): return False except: return False return True
def __init__(self, handle=None, windowTitle=None, appName=None):
if handle:
if winUser.isWindow(handle) == 0:
raise ValueError(
"Cannot create object for non existing window")
else:
self.handle = handle
self.windowTitle = windowTitle
self.appName = appName
else:
self.handle = api.getForegroundObject().windowHandle
self.windowTitle = api.getForegroundObject().name
self.appName = appModuleHandler.getAppNameFromProcessID(
api.getForegroundObject().processID, True)
def winEventToNVDAEvent(eventID, window, objectID, childID, useCache=True):
"""Tries to convert a win event ID to an NVDA event name, and instanciate or fetch an NVDAObject for
the win event parameters.
@param eventID: the win event ID (type)
@type eventID: integer
@param window: the win event's window handle
@type window: integer
@param objectID: the win event's object ID
@type objectID: integer
@param childID: the win event's childID
@type childID: the win event's childID
@param useCache: C{True} to use the L{liveNVDAObjectTable} cache when
retrieving an NVDAObject, C{False} if the cache should not be used.
@type useCache: boolean
@returns: the NVDA event name and the NVDAObject the event is for
@rtype: tuple of string and L{NVDAObjects.IAccessible.IAccessible}
"""
NVDAEventName = winEventIDsToNVDAEventNames.get(eventID, None)
if not NVDAEventName:
return None
# Ignore any events with invalid window handles
if not window or not winUser.isWindow(window):
return None
# Make sure this window does not have a ghost window if possible
if NVDAObjects.window.GhostWindowFromHungWindow and NVDAObjects.window.GhostWindowFromHungWindow(
window):
return None
# We do not support MSAA object proxied from native UIA
if UIAHandler.handler and UIAHandler.handler.isUIAWindow(window):
return None
obj = None
if useCache:
# See if we already know an object by this win event info
obj = liveNVDAObjectTable.get((window, objectID, childID), None)
# If we don't yet have the object, then actually instanciate it.
if not obj:
obj = NVDAObjects.IAccessible.getNVDAObjectFromEvent(
window, objectID, childID)
# At this point if we don't have an object then we can't do any more
if not obj:
return None
# SDM MSAA objects sometimes don't contain enough information to be useful Sometimes there is a real
# window that does, so try to get the SDMChild property on the NVDAObject, and if successull use that as
# obj instead.
if 'bosa_sdm' in obj.windowClassName:
SDMChild = getattr(obj, 'SDMChild', None)
if SDMChild:
obj = SDMChild
return (NVDAEventName, obj)
def _get_isAlive(self):
if self.isLoading:
return True
root = self.rootNVDAObject
if not root:
return False
if not winUser.isWindow(root.windowHandle):
return False
try:
isDefunct = bool(root.IAccessibleObject.states
& IAccessibleHandler.IA2_STATE_DEFUNCT)
except COMError:
# If IAccessible2 states can not be fetched at all, defunct should be assumed as the object has clearly been disconnected or is dead
isDefunct = True
return not isDefunct
def _get_isAlive(self):
if self.isLoading:
return True
root = self.rootNVDAObject
if not root:
return False
if not winUser.isWindow(root.windowHandle
) or controlTypes.STATE_DEFUNCT in root.states:
return False
try:
if not NVDAObjects.IAccessible.getNVDAObjectFromEvent(
root.windowHandle, winUser.OBJID_CLIENT, root.IA2UniqueID):
return False
except:
return False
return True
def _get_isAlive(self):
if self.isLoading:
return True
root = self.rootNVDAObject
if not root:
return False
try:
if not root.IAccessibleRole:
# The root object is dead.
return False
except watchdog.CallCancelled:
# #1831: If the root object isn't responding, treat the buffer as dead.
# Otherwise, we'll keep querying it on every focus change and freezing.
return False
states = root.states
if not winUser.isWindow(root.windowHandle) or controlTypes.STATE_EDITABLE in states:
return False
return True
def winEventToNVDAEvent(eventID,window,objectID,childID,useCache=True):
"""Tries to convert a win event ID to an NVDA event name, and instanciate or fetch an NVDAObject for the win event parameters.
@param eventID: the win event ID (type)
@type eventID: integer
@param window: the win event's window handle
@type window: integer
@param objectID: the win event's object ID
@type objectID: integer
@param childID: the win event's childID
@type childID: the win event's childID
@param useCache: C{True} to use the L{liveNVDAObjectTable} cache when retrieving an NVDAObject, C{False} if the cache should not be used.
@type useCache: boolean
@returns: the NVDA event name and the NVDAObject the event is for
@rtype: tuple of string and L{NVDAObjects.IAccessible.IAccessible}
"""
NVDAEventName=winEventIDsToNVDAEventNames.get(eventID,None)
if not NVDAEventName:
return None
#Ignore any events with invalid window handles
if not window or not winUser.isWindow(window):
return None
#Make sure this window does not have a ghost window if possible
if NVDAObjects.window.GhostWindowFromHungWindow and NVDAObjects.window.GhostWindowFromHungWindow(window):
return None
#We do not support MSAA object proxied from native UIA
if UIAHandler.handler and UIAHandler.handler.isUIAWindow(window):
return None
obj=None
if useCache:
#See if we already know an object by this win event info
obj=liveNVDAObjectTable.get((window,objectID,childID),None)
#If we don't yet have the object, then actually instanciate it.
if not obj:
obj=NVDAObjects.IAccessible.getNVDAObjectFromEvent(window,objectID,childID)
#At this point if we don't have an object then we can't do any more
if not obj:
return None
#SDM MSAA objects sometimes don't contain enough information to be useful
#Sometimes there is a real window that does, so try to get the SDMChild property on the NVDAObject, and if successull use that as obj instead.
if 'bosa_sdm' in obj.windowClassName:
SDMChild=getattr(obj,'SDMChild',None)
if SDMChild: obj=SDMChild
return (NVDAEventName,obj)
def _get_isAlive(self):
if self.isLoading:
return True
root = self.rootNVDAObject
if not root:
return False
try:
if not root.IAccessibleRole:
# The root object is dead.
return False
except watchdog.CallCancelled:
# #1831: If the root object isn't responding, treat the buffer as dead.
# Otherwise, we'll keep querying it on every focus change and freezing.
return False
states = root.states
if not winUser.isWindow(
root.windowHandle) or controlTypes.STATE_EDITABLE in states:
return False
return True
def winEventToNVDAEvent(eventID,window,objectID,childID,useCache=True):
"""Tries to convert a win event ID to an NVDA event name, and instanciate or fetch an NVDAObject for the win event parameters.
@param eventID: the win event ID (type)
@type eventID: integer
@param window: the win event's window handle
@type window: integer
@param objectID: the win event's object ID
@type objectID: integer
@param childID: the win event's childID
@type childID: the win event's childID
@param useCache: C{True} to use the L{liveNVDAObjectTable} cache when retrieving an NVDAObject, C{False} if the cache should not be used.
@type useCache: boolean
@returns: the NVDA event name and the NVDAObject the event is for
@rtype: tuple of string and L{NVDAObjects.IAccessible.IAccessible}
"""
#We can't handle MSAA create events. (Destroys are handled elsewhere.)
if eventID == winUser.EVENT_OBJECT_CREATE:
return None
#Handle the special MSAA caret object's locationChange and show events as 'caret' events for the focus object
NVDAEventName=winEventIDsToNVDAEventNames.get(eventID,None)
if not NVDAEventName:
return None
#Ignore any events with invalid window handles
if not window or not winUser.isWindow(window):
return None
obj=None
if useCache:
#See if we already know an object by this win event info
obj=liveNVDAObjectTable.get((window,objectID,childID),None)
#If we don't yet have the object, then actually instanciate it.
if not obj:
obj=NVDAObjects.IAccessible.getNVDAObjectFromEvent(window,objectID,childID)
#At this point if we don't have an object then we can't do any more
if not obj:
return None
#SDM MSAA objects sometimes don't contain enough information to be useful
#Sometimes there is a real window that does, so try to get the SDMChild property on the NVDAObject, and if successull use that as obj instead.
if 'bosa_sdm' in obj.windowClassName:
SDMChild=getattr(obj,'SDMChild',None)
if SDMChild: obj=SDMChild
return (NVDAEventName,obj)
def _get_isAlive(self): if self.isLoading: return True root=self.rootNVDAObject if not root: return False if not winUser.isWindow(root.windowHandle): return False if not root.isInForeground: # #7818: Subsequent checks make COM calls. # The chances of a buffer dying while the window is in the background are # low, so don't make COM calls in this case; just treat it as alive. # This prevents freezes on every focus change if the browser process # stops responding; e.g. it froze, crashed or is being debugged. return True try: isDefunct=bool(root.IAccessibleObject.states&IAccessibleHandler.IA2_STATE_DEFUNCT) except COMError: # If IAccessible2 states can not be fetched at all, defunct should be assumed as the object has clearly been disconnected or is dead isDefunct=True return not isDefunct
def _get_isAlive(self): if self.isLoading: return True root=self.rootNVDAObject if not root: return False if not winUser.isWindow(root.windowHandle): return False if not root.isInForeground: # #7818: Subsequent checks make COM calls. # The chances of a buffer dying while the window is in the background are # low, so don't make COM calls in this case; just treat it as alive. # This prevents freezes on every focus change if the browser process # stops responding; e.g. it froze, crashed or is being debugged. return True try: isDefunct=bool(root.IAccessibleObject.states&IAccessibleHandler.IA2_STATE_DEFUNCT) except COMError: # If IAccessible2 states can not be fetched at all, defunct should be assumed as the object has clearly been disconnected or is dead isDefunct=True return not isDefunct
def _get_isAlive(self):
if self.isLoading:
return True
root=self.rootNVDAObject
if not root:
return False
if not winUser.isWindow(root.windowHandle):
return False
if root.appModule.appName.startswith('wwahost') and not winUser.isDescendantWindow(winUser.getForegroundWindow(),root.windowHandle):
# #4572: When a wwahost hosted app is in the background it gets suspended and all COM calls freeze.
# Therefore we don't have enough info to say whether its dead or not. We assume it is alive until we can get a better answer.
return True
try:
if not root.IAccessibleRole:
# The root object is dead.
return False
except watchdog.CallCancelled:
# #1831: If the root object isn't responding, treat the buffer as dead.
# Otherwise, we'll keep querying it on every focus change and freezing.
return False
states=root.states
if controlTypes.STATE_EDITABLE in states:
return False
return True
def _get_isAlive(self):
if self.isLoading:
return True
root=self.rootNVDAObject
if not root:
return False
if not winUser.isWindow(root.windowHandle):
return False
if root.appModule.appName.startswith('wwahost') and not winUser.isDescendantWindow(winUser.getForegroundWindow(),root.windowHandle):
# #4572: When a wwahost hosted app is in the background it gets suspended and all COM calls freeze.
# Therefore we don't have enough info to say whether its dead or not. We assume it is alive until we can get a better answer.
return True
try:
if not root.IAccessibleRole:
# The root object is dead.
return False
except watchdog.CallCancelled:
# #1831: If the root object isn't responding, treat the buffer as dead.
# Otherwise, we'll keep querying it on every focus change and freezing.
return False
states=root.states
if controlTypes.STATE_EDITABLE in states:
return False
return True
winKernel.PROCESS_TERMINATE | winKernel.SYNCHRONIZE, False, processID)
if not h:
raise OSError("Could not open process for termination")
try:
winKernel.TerminateProcess(h, 1)
winKernel.waitForSingleObject(h, 2000)
finally:
winKernel.closeHandle(h)
#Handle running multiple instances of NVDA
try:
oldAppWindowHandle = winUser.FindWindow(u'wxWindowClassNR', u'NVDA')
except:
oldAppWindowHandle = 0
if not winUser.isWindow(oldAppWindowHandle):
oldAppWindowHandle = 0
if oldAppWindowHandle and not globalVars.appArgs.easeOfAccess:
if globalVars.appArgs.check_running:
# NVDA is running.
sys.exit(0)
try:
terminateRunningNVDA(oldAppWindowHandle)
except:
sys.exit(1)
if globalVars.appArgs.quit or (oldAppWindowHandle
and globalVars.appArgs.easeOfAccess):
sys.exit(0)
elif globalVars.appArgs.check_running:
# NVDA is not running.
sys.exit(1)
def _get_isAlive(self): root = self.rootNVDAObject return winUser.isWindow(root.windowHandle)
def _get_isAlive(self): root = self.rootNVDAObject return winUser.isWindow(root.windowHandle)
def isAlive(self):
return winUser.isWindow(self.rootNVDAObject.windowHandle)
def winEventCallback(handle, eventID, window, objectID, childID, threadID,
timestamp): # noqa: C901
if isMSAADebugLoggingEnabled():
log.debug(
f"Hook received winEvent: {getWinEventLogInfo(window, objectID, childID, eventID, threadID)}"
)
try:
# Ignore all object IDs from alert onwards (sound, nativeom etc) as we don't support them
if objectID <= winUser.OBJID_ALERT:
if isMSAADebugLoggingEnabled():
log.debug(
f"objectID not supported. "
f"Dropping winEvent {getWinEventLogInfo(window, objectID, childID, eventID, threadID)}"
)
return
# Ignore all locationChange events except ones for the caret
if eventID == winUser.EVENT_OBJECT_LOCATIONCHANGE and objectID != winUser.OBJID_CARET:
if isMSAADebugLoggingEnabled():
log.debug(
f"locationChange for something other than the caret. "
f"Dropping winEvent {getWinEventLogInfo(window, objectID, childID, eventID, threadID)}"
)
return
if eventID == winUser.EVENT_OBJECT_DESTROY:
_processDestroyWinEvent(window, objectID, childID)
return
# Change window objIDs to client objIDs for better reporting of objects
if (objectID == 0) and (childID == 0):
objectID = winUser.OBJID_CLIENT
if isMSAADebugLoggingEnabled():
log.debug(
f"Changing OBJID_WINDOW to OBJID_CLIENT "
f"for winEvent: {getWinEventLogInfo(window, objectID, childID, eventID, threadID)}"
)
# Ignore events with invalid window handles
isWindow = winUser.isWindow(window) if window else 0
if window == 0 or (not isWindow and eventID in (
winUser.EVENT_SYSTEM_SWITCHSTART,
winUser.EVENT_SYSTEM_SWITCHEND,
winUser.EVENT_SYSTEM_MENUEND,
winUser.EVENT_SYSTEM_MENUPOPUPEND,
)):
if isMSAADebugLoggingEnabled():
log.debug(
f"Changing NULL or invalid window to desktop window "
f"for winEvent: {getWinEventLogInfo(window, objectID, childID, eventID, threadID)}"
)
window = winUser.getDesktopWindow()
elif not isWindow:
if isMSAADebugLoggingEnabled():
log.debug(
f"Invalid window. "
f"Dropping winEvent: {getWinEventLogInfo(window, objectID, childID, eventID, threadID)}"
)
return
windowClassName = winUser.getClassName(window)
if windowClassName == "ConsoleWindowClass":
# #10113: we need to use winEvents to track the real thread for console windows.
consoleWindowsToThreadIDs[window] = threadID
# Modern IME candidate list windows fire menu events which confuse us
# and can't be used properly in conjunction with input composition support.
if windowClassName == "Microsoft.IME.UIManager.CandidateWindow.Host" and eventID in MENU_EVENTIDS:
if isMSAADebugLoggingEnabled():
log.debug(
f"Dropping menu event for IME window. "
f"WinEvent: {getWinEventLogInfo(window, objectID, childID, eventID, threadID)}"
)
return
if eventID == winUser.EVENT_SYSTEM_FOREGROUND:
# We never want to see foreground events for the Program Manager or Shell (task bar)
if windowClassName in ("Progman", "Shell_TrayWnd"):
if isMSAADebugLoggingEnabled():
log.debug(
f"Progman or shell_trayWnd window. "
f"Dropping winEvent: {getWinEventLogInfo(window, objectID, childID, eventID, threadID)}"
)
return
# #3831: Event handling can be deferred if Windows takes a while to change the foreground window.
# See pumpAll for details.
global _deferUntilForegroundWindow, _foregroundDefers
_deferUntilForegroundWindow = window
_foregroundDefers = 0
if isMSAADebugLoggingEnabled():
log.debug(
f"Recording foreground defer "
f"for WinEvent: {getWinEventLogInfo(window, objectID, childID, eventID, threadID)}"
)
if windowClassName == "MSNHiddenWindowClass":
# HACK: Events get fired by this window in Windows Live Messenger 2009 when it starts. If we send a
# WM_NULL to this window at this point (which happens in accessibleObjectFromEvent), Messenger will
# silently exit (#677). Therefore, completely ignore these events, which is useless to us anyway.
return
if isMSAADebugLoggingEnabled():
log.debug(
f"Adding winEvent to limiter: {getWinEventLogInfo(window, objectID, childID, eventID, threadID)}"
)
if winEventLimiter.addEvent(eventID, window, objectID, childID,
threadID):
core.requestPump()
except Exception:
log.error("winEventCallback", exc_info=True)
def winEventCallback(handle, eventID, window, objectID, childID, threadID, timestamp): # noqa: C901
try:
# Ignore all object IDs from alert onwards (sound, nativeom etc) as we don't support them
if objectID <= winUser.OBJID_ALERT:
return
# Ignore all locationChange events except ones for the caret
if eventID == winUser.EVENT_OBJECT_LOCATIONCHANGE and objectID != winUser.OBJID_CARET:
return
if eventID == winUser.EVENT_OBJECT_DESTROY:
_processDestroyWinEvent(window, objectID, childID)
return
# Change window objIDs to client objIDs for better reporting of objects
if (objectID == 0) and (childID == 0):
objectID = winUser.OBJID_CLIENT
# Ignore events with invalid window handles
isWindow = winUser.isWindow(window) if window else 0
if window == 0 or (
not isWindow and eventID in (
winUser.EVENT_SYSTEM_SWITCHSTART,
winUser.EVENT_SYSTEM_SWITCHEND,
winUser.EVENT_SYSTEM_MENUEND,
winUser.EVENT_SYSTEM_MENUPOPUPEND,
)
):
window = winUser.getDesktopWindow()
elif not isWindow:
return
if childID < 0:
tempWindow = window
while (
tempWindow
and not winUser.getWindowStyle(tempWindow) & winUser.WS_POPUP
and winUser.getClassName(tempWindow) == "MozillaWindowClass"
):
tempWindow = winUser.getAncestor(tempWindow, winUser.GA_PARENT)
if tempWindow and winUser.getClassName(tempWindow).startswith('Mozilla'):
window = tempWindow
windowClassName = winUser.getClassName(window)
if windowClassName == "ConsoleWindowClass":
# #10113: we need to use winEvents to track the real thread for console windows.
consoleWindowsToThreadIDs[window] = threadID
# Modern IME candidate list windows fire menu events which confuse us
# and can't be used properly in conjunction with input composition support.
if windowClassName == "Microsoft.IME.UIManager.CandidateWindow.Host" and eventID in MENU_EVENTIDS:
return
# At the moment we can't handle show, hide or reorder events on Mozilla Firefox Location bar,
# as there are just too many of them Ignore show, hide and reorder on MozillaDropShadowWindowClass
# windows.
if (
windowClassName.startswith('Mozilla')
and eventID in (
winUser.EVENT_OBJECT_SHOW,
winUser.EVENT_OBJECT_HIDE,
winUser.EVENT_OBJECT_REORDER
) and childID < 0
):
# Mozilla Gecko can sometimes fire win events on a catch-all window which isn't really the real window
# Move up the ancestry to find the real mozilla Window and use that
if winUser.getClassName(window) == 'MozillaDropShadowWindowClass':
return
if eventID == winUser.EVENT_SYSTEM_FOREGROUND:
# We never want to see foreground events for the Program Manager or Shell (task bar)
if windowClassName in ("Progman", "Shell_TrayWnd"):
return
# #3831: Event handling can be deferred if Windows takes a while to change the foreground window.
# See pumpAll for details.
global _deferUntilForegroundWindow, _foregroundDefers
_deferUntilForegroundWindow = window
_foregroundDefers = 0
if windowClassName == "MSNHiddenWindowClass":
# HACK: Events get fired by this window in Windows Live Messenger 2009 when it starts. If we send a
# WM_NULL to this window at this point (which happens in accessibleObjectFromEvent), Messenger will
# silently exit (#677). Therefore, completely ignore these events, which is useless to us anyway.
return
if winEventLimiter.addEvent(eventID, window, objectID, childID, threadID):
core.requestPump()
except: # noqa: E722 Bare except
log.error("winEventCallback", exc_info=True)
def isAlive(self):
return bool(winUser.isWindow(self.handle))
def isAlive(self): return winUser.isWindow(self.rootNVDAObject.windowHandle)
def winEventToNVDAEvent(eventID, window, objectID, childID, useCache=True):
"""Tries to convert a win event ID to an NVDA event name, and instanciate or fetch an NVDAObject for
the win event parameters.
@param eventID: the win event ID (type)
@type eventID: integer
@param window: the win event's window handle
@type window: integer
@param objectID: the win event's object ID
@type objectID: integer
@param childID: the win event's childID
@type childID: the win event's childID
@param useCache: C{True} to use the L{liveNVDAObjectTable} cache when
retrieving an NVDAObject, C{False} if the cache should not be used.
@type useCache: boolean
@returns: the NVDA event name and the NVDAObject the event is for
@rtype: tuple of string and L{NVDAObjects.IAccessible.IAccessible}
"""
if isMSAADebugLoggingEnabled():
log.debug(
f"Creating NVDA event from winEvent: {getWinEventLogInfo(window, objectID, childID, eventID)}, "
f"use cache {useCache}"
)
NVDAEventName = internalWinEventHandler.winEventIDsToNVDAEventNames.get(eventID, None)
if not NVDAEventName:
log.debugWarning(f"No NVDA event name for {getWinEventName(eventID)}")
return None
if isMSAADebugLoggingEnabled():
log.debug(f"winEvent mapped to NVDA event: {NVDAEventName}")
# Ignore any events with invalid window handles
if not window or not winUser.isWindow(window):
if isMSAADebugLoggingEnabled():
log.debug(
f"Invalid window. Dropping winEvent {getWinEventLogInfo(window, objectID, childID, eventID)}"
)
return None
# Make sure this window does not have a ghost window if possible
if NVDAObjects.window.GhostWindowFromHungWindow and NVDAObjects.window.GhostWindowFromHungWindow(window):
if isMSAADebugLoggingEnabled():
log.debug(
f"Ghosted hung window. Dropping winEvent {getWinEventLogInfo(window, objectID, childID, eventID)}"
)
return None
# We do not support MSAA object proxied from native UIA
if UIAHandler.handler and UIAHandler.handler.isUIAWindow(window):
if isMSAADebugLoggingEnabled():
log.debug(
f"Native UIA window. Dropping winEvent {getWinEventLogInfo(window, objectID, childID, eventID)}"
)
return None
obj = None
if useCache:
# See if we already know an object by this win event info
obj = liveNVDAObjectTable.get((window, objectID, childID), None)
if isMSAADebugLoggingEnabled() and obj:
log.debug(
f"Fetched existing NVDAObject {obj} from liveNVDAObjectTable"
f" for winEvent {getWinEventLogInfo(window, objectID, childID)}"
)
# If we don't yet have the object, then actually instanciate it.
if not obj:
obj = NVDAObjects.IAccessible.getNVDAObjectFromEvent(window, objectID, childID)
# At this point if we don't have an object then we can't do any more
if not obj:
if isMSAADebugLoggingEnabled():
log.debug(
"Could not instantiate an NVDAObject for winEvent: "
f"{getWinEventLogInfo(window, objectID, childID, eventID)}"
)
return None
# SDM MSAA objects sometimes don't contain enough information to be useful Sometimes there is a real
# window that does, so try to get the SDMChild property on the NVDAObject, and if successull use that as
# obj instead.
if 'bosa_sdm' in obj.windowClassName:
SDMChild = getattr(obj, 'SDMChild', None)
if SDMChild:
obj = SDMChild
if isMSAADebugLoggingEnabled():
log.debug(
f"Successfully created NVDA event {NVDAEventName} for {obj} "
f"from winEvent {getWinEventLogInfo(window, objectID, childID, eventID)}"
)
return (NVDAEventName, obj)
