public CFNotificationObserverToken AddObserver(string name, INativeObject objectToObserve, Action <string, NSDictionary> notificationHandler,
CFNotificationSuspensionBehavior suspensionBehavior = CFNotificationSuspensionBehavior.DeliverImmediately)
{
if (darwinnc != null && darwinnc.Handle == Handle)
{
if (name == null)
{
throw new ArgumentNullException("name", "When using the Darwin Notification Center, the value passed must not be null");
}
}
var strHandle = name == null ? IntPtr.Zero : NSString.CreateNative(name);
name = name ?? NullNotificationName;
var token = new CFNotificationObserverToken()
{
stringName = name,
centerHandle = handle,
nameHandle = strHandle,
observedObject = objectToObserve == null ? IntPtr.Zero : objectToObserve.Handle,
listener = notificationHandler
};
//
// To allow callbacks to add observers, we duplicate the list of listeners on AddObserver
// We do the duplication on AddObserver, instead of making a copy on the notification
// callback, as we expect the notification callback to be a more common operation
// than the AddObserver operation
//
List <CFNotificationObserverToken> listenersForName;
lock (listeners){
if (!listeners.TryGetValue(name, out listenersForName))
{
listenersForName = new List <CFNotificationObserverToken> (1);
CFNotificationCenterAddObserver(center: handle,
observer: handle,
callback: NotificationCallback,
name: strHandle,
obj: token.observedObject,
suspensionBehavior: (IntPtr)suspensionBehavior);
}
else
{
listenersForName = new List <CFNotificationObserverToken> (listenersForName);
}
listenersForName.Add(token);
listeners [name] = listenersForName;
}
return(token);
}
public void AddObserver(string value, CFNotificationSuspensionBehavior suspensionBehavior = CFNotificationSuspensionBehavior.DeliverImmediately)
{
ObserverCount++;
centers [handle] = this;
var strHandle = value == null ? IntPtr.Zero : NSString.CreateNative(value);
AddObserver(center: handle,
observer: handle,
callback: NotificationCallback,
name: strHandle,
obj: IntPtr.Zero,
suspensionBehavior: suspensionBehavior);
if (value != null)
{
NSString.ReleaseNative(strHandle);
}
}
public void AddObserver(string value, CFNotificationSuspensionBehavior suspensionBehavior = CFNotificationSuspensionBehavior.DeliverImmediately)
{
ObserverCount++;
centers [handle] = this;
var strHandle = value == null ? IntPtr.Zero : NSString.CreateNative (value);
AddObserver (center: handle,
observer: handle,
callback: NotificationCallback,
name: strHandle,
obj: IntPtr.Zero,
suspensionBehavior: suspensionBehavior);
if (value != null)
NSString.ReleaseNative (strHandle);
}
static unsafe extern void AddObserver(CFNotificationCenterRef center, IntPtr observer, CFNotificationCallback callback, IntPtr name, IntPtr obj, CFNotificationSuspensionBehavior suspensionBehavior);
static extern unsafe void AddObserver(CFNotificationCenterRef center, IntPtr observer, CFNotificationCallback callback, IntPtr name, IntPtr obj, CFNotificationSuspensionBehavior suspensionBehavior);
public CFNotificationObserverToken AddObserver(string name, INativeObject objectToObserve, Action<string,NSDictionary> notificationHandler,
CFNotificationSuspensionBehavior suspensionBehavior = CFNotificationSuspensionBehavior.DeliverImmediately)
{
if (darwinnc != null && darwinnc.Handle == Handle){
if (name == null)
throw new ArgumentNullException ("name", "When using the Darwin Notification Center, the value passed must not be null");
}
var strHandle = name == null ? IntPtr.Zero : NSString.CreateNative (name);
var token = new CFNotificationObserverToken () {
stringName = name,
centerHandle = handle,
nameHandle = strHandle,
observedObject = objectToObserve == null ? IntPtr.Zero : objectToObserve.Handle,
listener = notificationHandler
};
//
// To allow callbacks to add observers, we duplicate the list of listeners on AddObserver
// We do the duplication on AddObserver, instead of making a copy on the notification
// callback, as we expect the notification callback to be a more common operation
// than the AddObserver operation
//
List<CFNotificationObserverToken> listenersForName;
lock (listeners){
if (!listeners.TryGetValue (name, out listenersForName)){
listenersForName = new List<CFNotificationObserverToken> (1);
CFNotificationCenterAddObserver (center: handle,
observer: handle,
callback: NotificationCallback,
name: strHandle,
obj: token.observedObject,
suspensionBehavior: (IntPtr) suspensionBehavior);
} else
listenersForName = new List<CFNotificationObserverToken> (listenersForName);
listenersForName.Add (token);
listeners [name] = listenersForName;
}
return token;
}
