// Returns the list of class listeners for the given
// DType and RoutedEvent
// NOTE: Returns null if no matches found
// Helper method for GetClassListeners
// Invoked when trying to build the event route
// as well as when registering a new class handler
internal static RoutedEventHandlerInfoList GetDTypedClassListeners(
DependencyObjectType dType,
RoutedEvent routedEvent,
out ClassHandlersStore classListenersLists,
out int index)
{
// Get the ClassHandlersStore for the given DType
classListenersLists = (ClassHandlersStore)_dTypedClassListeners[dType];
RoutedEventHandlerInfoList handlers;
if (classListenersLists != null)
{
// Get the handlers for the given DType and RoutedEvent
index = classListenersLists.GetHandlersIndex(routedEvent);
if (index != -1)
{
handlers = classListenersLists.GetExistingHandlers(index);
return(handlers);
}
}
lock (Synchronized)
{
// Search the DTypeMap for the list of matching RoutedEventHandlerInfo
handlers = GetUpdatedDTypedClassListeners(dType, routedEvent, out classListenersLists, out index);
}
return(handlers);
}
// Helper method for GetDTypedClassListeners
// Returns updated list of class listeners for the given
// DType and RoutedEvent
// NOTE: Returns null if no matches found
// Invoked when trying to build the event route
// as well as when registering a new class handler
private static RoutedEventHandlerInfoList GetUpdatedDTypedClassListeners(
DependencyObjectType dType,
RoutedEvent routedEvent,
out ClassHandlersStore classListenersLists,
out int index)
{
// Get the ClassHandlersStore for the given DType
classListenersLists = (ClassHandlersStore)_dTypedClassListeners[dType];
RoutedEventHandlerInfoList handlers;
if (classListenersLists != null)
{
// Get the handlers for the given DType and RoutedEvent
index = classListenersLists.GetHandlersIndex(routedEvent);
if (index != -1)
{
handlers = classListenersLists.GetExistingHandlers(index);
return(handlers);
}
}
// Since matching handlers were not found at this level
// browse base classes to check for registered class handlers
DependencyObjectType tempDType = dType;
ClassHandlersStore tempClassListenersLists = null;
RoutedEventHandlerInfoList tempHandlers = null;
int tempIndex = -1;
while (tempIndex == -1 && tempDType.Id != _dependencyObjectType.Id)
{
tempDType = tempDType.BaseType;
tempClassListenersLists = (ClassHandlersStore)_dTypedClassListeners[tempDType];
if (tempClassListenersLists != null)
{
// Get the handlers for the DType and RoutedEvent
tempIndex = tempClassListenersLists.GetHandlersIndex(routedEvent);
if (tempIndex != -1)
{
tempHandlers = tempClassListenersLists.GetExistingHandlers(tempIndex);
}
}
}
if (classListenersLists == null)
{
if (dType.SystemType == typeof(UIElement) || dType.SystemType == typeof(ContentElement))
{
classListenersLists = new ClassHandlersStore(80); // Based on the number of class handlers for these classes
}
else
{
classListenersLists = new ClassHandlersStore(1);
}
_dTypedClassListeners[dType] = classListenersLists;
}
index = classListenersLists.CreateHandlersLink(routedEvent, tempHandlers);
return(tempHandlers);
}
// Helper method for GetDTypedClassListeners
// Returns updated list of class listeners for the given
// DType and RoutedEvent
// NOTE: Returns null if no matches found
// Invoked when trying to build the event route
// as well as when registering a new class handler
private static RoutedEventHandlerInfoList GetUpdatedDTypedClassListeners(
DependencyObjectType dType,
RoutedEvent routedEvent,
out ClassHandlersStore classListenersLists,
out int index)
{
// Get the ClassHandlersStore for the given DType
classListenersLists = (ClassHandlersStore)_dTypedClassListeners[dType];
RoutedEventHandlerInfoList handlers;
if (classListenersLists != null)
{
// Get the handlers for the given DType and RoutedEvent
index = classListenersLists.GetHandlersIndex(routedEvent);
if (index != -1)
{
handlers = classListenersLists.GetExistingHandlers(index);
return handlers;
}
}
// Since matching handlers were not found at this level
// browse base classes to check for registered class handlers
DependencyObjectType tempDType = dType;
ClassHandlersStore tempClassListenersLists = null;
RoutedEventHandlerInfoList tempHandlers = null;
int tempIndex = -1;
while (tempIndex == -1 && tempDType.Id != _dependencyObjectType.Id)
{
tempDType = tempDType.BaseType;
tempClassListenersLists = (ClassHandlersStore)_dTypedClassListeners[tempDType];
if (tempClassListenersLists != null)
{
// Get the handlers for the DType and RoutedEvent
tempIndex = tempClassListenersLists.GetHandlersIndex(routedEvent);
if (tempIndex != -1)
{
tempHandlers = tempClassListenersLists.GetExistingHandlers(tempIndex);
}
}
}
if (classListenersLists == null)
{
if (dType.SystemType == typeof(UIElement) || dType.SystemType == typeof(ContentElement))
{
classListenersLists = new ClassHandlersStore(80); // Based on the number of class handlers for these classes
}
else
{
classListenersLists = new ClassHandlersStore(1);
}
_dTypedClassListeners[dType] = classListenersLists;
}
index = classListenersLists.CreateHandlersLink(routedEvent, tempHandlers);
return tempHandlers;
}
// Returns the list of class listeners for the given
// DType and RoutedEvent
// NOTE: Returns null if no matches found
// Helper method for GetClassListeners
// Invoked when trying to build the event route
// as well as when registering a new class handler
internal static RoutedEventHandlerInfoList GetDTypedClassListeners(
DependencyObjectType dType,
RoutedEvent routedEvent,
out ClassHandlersStore classListenersLists,
out int index)
{
// Get the ClassHandlersStore for the given DType
classListenersLists = (ClassHandlersStore)_dTypedClassListeners[dType];
RoutedEventHandlerInfoList handlers;
if (classListenersLists != null)
{
// Get the handlers for the given DType and RoutedEvent
index = classListenersLists.GetHandlersIndex(routedEvent);
if (index != -1)
{
handlers = classListenersLists.GetExistingHandlers(index);
return handlers;
}
}
lock (Synchronized)
{
// Search the DTypeMap for the list of matching RoutedEventHandlerInfo
handlers = GetUpdatedDTypedClassListeners(dType, routedEvent, out classListenersLists, out index);
}
return handlers;
}