public static void AddListener <TReturn>(string eventType, Func <TReturn> handler)
{
MessengerInternal.AddListener(eventType, handler);
}
public static void RemoveListener(string eventType, Action handler)
{
MessengerInternal.RemoveListener(eventType, handler);
}
static public void AddListener(string eventType, Delegate callback)
{
MessengerInternal.OnListenerAdding(eventType, callback);
eventTable[eventType] = Delegate.Combine(eventTable[eventType], callback);
}
static public void RemoveListener(string eventType, Delegate handler)
{
MessengerInternal.OnListenerRemoving(eventType, handler);
eventTable[eventType] = Delegate.Remove(eventTable[eventType], handler);
MessengerInternal.OnListenerRemoved(eventType);
}
static public void AddListener(string eventType, Action handler)
{
MessengerInternal.AddListener(eventType, handler);
}
static public void RemoveListener <TReturn>(string eventType, Func <TReturn> handler)
{
MessengerInternal.RemoveListener(eventType, handler);
}
static public void RemoveListener(string eventType, Callback handler)
{
MessengerInternal.OnListenerRemoving(eventType, handler);
eventTable[eventType] = (Callback)eventTable[eventType] - handler;
MessengerInternal.OnListenerRemoved(eventType);
}
public Messenger()
{
_messengerInternal = new MessengerInternal();
_eventTable = _messengerInternal.EventTable;
}
static public void resetAllMessengers()
{
MessengerInternal.resetAllMessengers();
}
static public void AddListener(string eventType, Callback handler)
{
MessengerInternal.OnListenerAdding(eventType, handler);
eventTable[eventType] = (Callback)eventTable[eventType] + handler;
}
static public void addListener(MessageType messageType, OnMessageDelegate handler)
{
MessengerInternal.onAddListener(messageType, handler);
eventTable[messageType] = (OnMessageDelegate)eventTable[messageType] + handler;
}
// Messenger.cs v1.0 by Magnus Wolffelt, [email protected] // Version 1.4 by Julie Iaccarino, biscuitWizard @ github.com // // Inspired by and based on Rod Hyde's Messenger: // http://www.unifycommunity.com/wiki/index.php?title=CSharpMessenger // // This is a C# messenger (notification center). It uses delegates // and generics to provide type-checked messaging between event producers and // event consumers, without the need for producers or consumers to be aware of // each other. The major improvement from Hyde's implementation is that // there is more extensive error detection, preventing silent bugs. // // Usage example: // Messenger<float>.AddListener("myEvent", MyEventHandler); // ... // Messenger<float>.Broadcast("myEvent", 1.0f); // // Callback example: // Messenger<float>.AddListener<string>("myEvent", MyEventHandler); // private string MyEventHandler(float f1) { return "Test " + f1; } // ... // Messenger<float>.Broadcast<string>("myEvent", 1.0f, MyEventCallback); // private void MyEventCallback(string s1) { Debug.Log(s1"); } using System; using System.Collections.Generic; using System.Linq; public enum MessengerMode { DONT_REQUIRE_LISTENER, REQUIRE_LISTENER, } static internal class MessengerInternal { readonly public static Dictionary<string, Delegate> eventTable = new Dictionary<string, Delegate>(); static public readonly MessengerMode DEFAULT_MODE = MessengerMode.REQUIRE_LISTENER; static public void AddListener(string eventType, Delegate callback) { MessengerInternal.OnListenerAdding(eventType, callback); eventTable[eventType] = Delegate.Combine(eventTable[eventType], callback); } static public void RemoveListener(string eventType, Delegate handler) { MessengerInternal.OnListenerRemoving(eventType, handler); eventTable[eventType] = Delegate.Remove(eventTable[eventType], handler); MessengerInternal.OnListenerRemoved(eventType); } static public T[] GetInvocationList<T>(string eventType) { Delegate d; if (eventTable.TryGetValue(eventType, out d)) { if (d != null) { return d.GetInvocationList().Cast<T>().ToArray(); } else { throw MessengerInternal.CreateBroadcastSignatureException(eventType); } } return null; } static public void OnListenerAdding(string eventType, Delegate listenerBeingAdded) { if (!eventTable.ContainsKey(eventType)) { eventTable.Add(eventType, null); } var d = eventTable[eventType]; if (d != null && d.GetType() != listenerBeingAdded.GetType()) { throw new ListenerException(string.Format("Attempting to add listener with inconsistent signature for event type {0}. Current listeners have type {1} and listener being added has type {2}", eventType, d.GetType().Name, listenerBeingAdded.GetType().Name)); } } static public void OnListenerRemoving(string eventType, Delegate listenerBeingRemoved) { if (eventTable.ContainsKey(eventType)) { var d = eventTable[eventType]; if (d == null) { throw new ListenerException(string.Format("Attempting to remove listener with for event type {0} but current listener is null.", eventType)); } else if (d.GetType() != listenerBeingRemoved.GetType()) { throw new ListenerException(string.Format("Attempting to remove listener with inconsistent signature for event type {0}. Current listeners have type {1} and listener being removed has type {2}", eventType, d.GetType().Name, listenerBeingRemoved.GetType().Name)); } } else { throw new ListenerException(string.Format("Attempting to remove listener for type {0} but Messenger doesn't know about this event type.", eventType)); } } static public void OnListenerRemoved(string eventType) { if (eventTable[eventType] == null) { eventTable.Remove(eventType); } } static public void OnBroadcasting(string eventType, MessengerMode mode) { if (mode == MessengerMode.REQUIRE_LISTENER && !eventTable.ContainsKey(eventType)) { throw new MessengerInternal.BroadcastException(string.Format("Broadcasting message {0} but no listener found.", eventType)); } } static public BroadcastException CreateBroadcastSignatureException(string eventType) { return new BroadcastException(string.Format("Broadcasting message {0} but listeners have a different signature than the broadcaster.", eventType)); } public class BroadcastException : Exception { public BroadcastException(string msg) : base(msg) { } } public class ListenerException : Exception { public ListenerException(string msg) : base(msg) { } } } // No parameters static public class Messenger { static public void AddListener(string eventType, Action handler) { MessengerInternal.AddListener(eventType, handler); } static public void AddListener<TReturn>(string eventType, Func<TReturn> handler) { MessengerInternal.AddListener(eventType, handler); } static public void RemoveListener(string eventType, Action handler) { MessengerInternal.RemoveListener(eventType, handler); } static public void RemoveListener<TReturn>(string eventType, Func<TReturn> handler) { MessengerInternal.RemoveListener(eventType, handler); } static public void Broadcast(string eventType) { Broadcast(eventType, MessengerInternal.DEFAULT_MODE); } static public void Broadcast<TReturn>(string eventType, Action<TReturn> returnCall) { Broadcast(eventType, returnCall, MessengerInternal.DEFAULT_MODE); } static public void Broadcast(string eventType, MessengerMode mode) { MessengerInternal.OnBroadcasting(eventType, mode); var invocationList = MessengerInternal.GetInvocationList<Action>(eventType); foreach (var callback in invocationList) callback.Invoke(); } static public void Broadcast<TReturn>(string eventType, Action<TReturn> returnCall, MessengerMode mode) { MessengerInternal.OnBroadcasting(eventType, mode); var invocationList = MessengerInternal.GetInvocationList<Func<TReturn>>(eventType); foreach (var result in invocationList.Select(del => del.Invoke()).Cast<TReturn>()) { returnCall.Invoke(result); } } } // One parameter static public class Messenger<T> { static public void AddListener(string eventType, Action<T> handler) { MessengerInternal.AddListener(eventType, handler); } static public void AddListener<TReturn>(string eventType, Func<T, TReturn> handler) { MessengerInternal.AddListener(eventType, handler); } static public void RemoveListener(string eventType, Action<T> handler) { MessengerInternal.RemoveListener(eventType, handler); } static public void RemoveListener<TReturn>(string eventType, Func<T, TReturn> handler) { MessengerInternal.RemoveListener(eventType, handler); } static public void Broadcast(string eventType, T arg1) { Broadcast(eventType, arg1, MessengerInternal.DEFAULT_MODE); } static public void Broadcast<TReturn>(string eventType, T arg1, Action<TReturn> returnCall) { Broadcast(eventType, arg1, returnCall, MessengerInternal.DEFAULT_MODE); } static public void Broadcast(string eventType, T arg1, MessengerMode mode) { MessengerInternal.OnBroadcasting(eventType, mode); var invocationList = MessengerInternal.GetInvocationList<Action<T>>(eventType); foreach (var callback in invocationList) callback.Invoke(arg1); } static public void Broadcast<TReturn>(string eventType, T arg1, Action<TReturn> returnCall, MessengerMode mode) { MessengerInternal.OnBroadcasting(eventType, mode); var invocationList = MessengerInternal.GetInvocationList<Func<T, TReturn>>(eventType); foreach (var result in invocationList.Select(del => del.Invoke(arg1)).Cast<TReturn>()) { returnCall.Invoke(result); } } } // Two parameters static public class Messenger<T, U> { static public void AddListener(string eventType, Action<T, U> handler) { MessengerInternal.AddListener(eventType, handler); } static public void AddListener<TReturn>(string eventType, Func<T, U, TReturn> handler) { MessengerInternal.AddListener(eventType, handler); } static public void RemoveListener(string eventType, Action<T, U> handler) { MessengerInternal.RemoveListener(eventType, handler); } static public void RemoveListener<TReturn>(string eventType, Func<T, U, TReturn> handler) { MessengerInternal.RemoveListener(eventType, handler); } static public void Broadcast(string eventType, T arg1, U arg2) { Broadcast(eventType, arg1, arg2, MessengerInternal.DEFAULT_MODE); } static public void Broadcast<TReturn>(string eventType, T arg1, U arg2, Action<TReturn> returnCall) { Broadcast(eventType, arg1, arg2, returnCall, MessengerInternal.DEFAULT_MODE); } static public void Broadcast(string eventType, T arg1, U arg2, MessengerMode mode) { MessengerInternal.OnBroadcasting(eventType, mode); var invocationList = MessengerInternal.GetInvocationList<Action<T, U>>(eventType); foreach (var callback in invocationList) callback.Invoke(arg1, arg2); } static public void Broadcast<TReturn>(string eventType, T arg1, U arg2, Action<TReturn> returnCall, MessengerMode mode) { MessengerInternal.OnBroadcasting(eventType, mode); var invocationList = MessengerInternal.GetInvocationList<Func<T, U, TReturn>>(eventType); foreach (var result in invocationList.Select(del => del.Invoke(arg1, arg2)).Cast<TReturn>()) { returnCall.Invoke(result); } } } // Three parameters static public class Messenger<T, U, V> { static public void AddListener(string eventType, Action<T, U, V> handler) { MessengerInternal.AddListener(eventType, handler); } static public void AddListener<TReturn>(string eventType, Func<T, U, V, TReturn> handler) { MessengerInternal.AddListener(eventType, handler); } static public void RemoveListener(string eventType, Action<T, U, V> handler) { MessengerInternal.RemoveListener(eventType, handler); } static public void RemoveListener<TReturn>(string eventType, Func<T, U, V, TReturn> handler) { MessengerInternal.RemoveListener(eventType, handler); } static public void Broadcast(string eventType, T arg1, U arg2, V arg3) { Broadcast(eventType, arg1, arg2, arg3, MessengerInternal.DEFAULT_MODE); } static public void Broadcast<TReturn>(string eventType, T arg1, U arg2, V arg3, Action<TReturn> returnCall) { Broadcast(eventType, arg1, arg2, arg3, returnCall, MessengerInternal.DEFAULT_MODE); } static public void Broadcast(string eventType, T arg1, U arg2, V arg3, MessengerMode mode) { MessengerInternal.OnBroadcasting(eventType, mode); var invocationList = MessengerInternal.GetInvocationList<Action<T, U, V>>(eventType); foreach (var callback in invocationList) callback.Invoke(arg1, arg2, arg3); } static public void Broadcast<TReturn>(string eventType, T arg1, U arg2, V arg3, Action<TReturn> returnCall, MessengerMode mode) { MessengerInternal.OnBroadcasting(eventType, mode); var invocationList = MessengerInternal.GetInvocationList<Func<T, U, V, TReturn>>(eventType); foreach (var result in invocationList.Select(del => del.Invoke(arg1, arg2, arg3)).Cast<TReturn>()) { returnCall.Invoke(result); } } }
static public void RemoveAllListeners(string eventType)
{
eventTable[eventType] = null;
MessengerInternal.OnListenerRemoved(eventType);
}
static public void RemoveListener <TReturn>(object eventType, Func <TReturn> handler)
{
MessengerInternal.RemoveListener(eventType.ToString(), handler);
}
static public void RemoveListener(object eventType, Action handler)
{
MessengerInternal.RemoveListener(eventType.ToString(), handler);
}