private static WeakListenerInternal CreateWeakListener(object target, object state)
{
var eventInfo = (EventInfo)state;
var listenerInternal = new WeakListenerInternal(target, eventInfo);
listenerInternal.Handler = eventInfo.EventHandlerType == typeof(EventHandler)
? new EventHandler(listenerInternal.Raise)
: ServiceProvider.ReflectionManager.TryCreateDelegate(eventInfo.EventHandlerType,
listenerInternal, WeakListenerInternal.HandleMethod);
if (listenerInternal.Handler == null)
{
return(WeakListenerInternal.EmptyListener);
}
#if PCL_WINRT
var addMethod = eventInfo.AddMethod;
#else
var addMethod = eventInfo.GetAddMethod(true);
#endif
if (addMethod == null)
{
return(WeakListenerInternal.EmptyListener);
}
listenerInternal.RegToken = addMethod.InvokeEx(target, listenerInternal.Handler);
return(listenerInternal);
}
static WeakListenerInternal()
{
Empty = new WeakEventListenerWrapper[0];
AddSourceEventDelegate = AddSourceEvent;
UpdateSourceEventDelegate = UpdateSourceEvent;
HandleMethod = typeof(WeakListenerInternal).GetMethodEx("Raise", MemberFlags.Public | MemberFlags.Instance);
EmptyListener = new WeakListenerInternal();
}
static WeakListenerInternal()
{
Empty = new WeakEventListenerWrapper[0];
AddSourceEventDelegate = AddSourceEvent;
UpdateSourceEventDelegate = UpdateSourceEvent;
HandleMethod = typeof(WeakListenerInternal).GetMethodEx("Raise", MemberFlags.Public | MemberFlags.Instance);
EmptyListener = new WeakListenerInternal();
}
private static WeakListenerInternal CreateContextListener(object src, object state)
{
var listenerInternal = new WeakListenerInternal(src, null);
var handler = new EventHandler <ISourceValue, EventArgs>(listenerInternal.Raise);
listenerInternal.Handler = handler;
BindingServiceProvider.ContextManager.GetBindingContext(src).ValueChanged += handler;
return(listenerInternal);
}
private static WeakListenerInternal CreateContextListener(object src, object state)
{
var context = (IBindingContext)state;
var listenerInternal = new WeakListenerInternal(src, null);
var handler = new EventHandler <ISourceValue, EventArgs>(listenerInternal.Raise);
listenerInternal.Handler = handler;
context.ValueChanged += handler;
return(listenerInternal);
}
private static WeakListenerInternal CreateWeakListener(object target, object state)
{
var eventInfo = (EventInfo)state;
var listenerInternal = new WeakListenerInternal(target, eventInfo);
listenerInternal.Handler = eventInfo.EventHandlerType == typeof(EventHandler)
? new EventHandler(listenerInternal.Raise)
: ServiceProvider.ReflectionManager.TryCreateDelegate(eventInfo.EventHandlerType,
listenerInternal, WeakListenerInternal.HandleMethod);
if (listenerInternal.Handler == null)
return WeakListenerInternal.EmptyListener;
#if PCL_WINRT
var addMethod = eventInfo.AddMethod;
#else
var addMethod = eventInfo.GetAddMethod(true);
#endif
if (addMethod == null)
return WeakListenerInternal.EmptyListener;
listenerInternal.RegToken = addMethod.InvokeEx(target, listenerInternal.Handler);
return listenerInternal;
}
private static WeakListenerInternal CreateContextListener(object src, object state)
{
var context = (IBindingContext)state;
var listenerInternal = new WeakListenerInternal(src, null);
var handler = new EventHandler<ISourceValue, EventArgs>(listenerInternal.Raise);
listenerInternal.Handler = handler;
context.ValueChanged += handler;
return listenerInternal;
}
private static WeakListenerInternal UpdateSourceEvent(object source,
Func<object, object, WeakListenerInternal> addValue, WeakListenerInternal currentValue, object state)
{
var array = (object[])state;
var weakItem = (WeakEventListenerWrapper)array[1];
array[2] = currentValue.AddInternal(weakItem, true);
return currentValue;
}
private static WeakListenerInternal UpdateSourceEvent(object source,
Func <object, object, WeakListenerInternal> addValue, WeakListenerInternal currentValue, object state)
{
var array = (object[])state;
var weakItem = (WeakEventListenerWrapper)array[1];
array[2] = currentValue.AddInternal(weakItem, true);
return(currentValue);
}
