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RPOSWindowMessageCenter.cs
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RPOSWindowMessageCenter.cs
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using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using UnityEngine;
[StructLayout(LayoutKind.Sequential)]
public struct RPOSWindowMessageCenter
{
public const RPOSWindowMessage kBegin = RPOSWindowMessage.WillShow;
public const RPOSWindowMessage kLast = RPOSWindowMessage.DidHide;
public const RPOSWindowMessage kEnd = RPOSWindowMessage.WillClose;
public const int kMessageCount = 4;
private RPOSWindowMessageResponder[] responders;
private bool init;
private static readonly RPOSWindowMessageHandler[] none;
static RPOSWindowMessageCenter()
{
none = new RPOSWindowMessageHandler[0];
}
public void Fire(RPOSWindow window, RPOSWindowMessage message)
{
if ((this.init && (message >= RPOSWindowMessage.WillShow)) && (message <= RPOSWindowMessage.DidHide))
{
this.responders[((int) message) - 2].Invoke(window, message);
}
}
public bool Add(RPOSWindowMessage message, RPOSWindowMessageHandler handler)
{
if (((message < RPOSWindowMessage.WillShow) || (message > RPOSWindowMessage.DidHide)) || (handler == null))
{
return false;
}
if (!this.init)
{
this.responders = new RPOSWindowMessageResponder[4];
this.init = true;
}
return this.responders[((int) message) - 2].Add(handler);
}
public bool Remove(RPOSWindowMessage message, RPOSWindowMessageHandler handler)
{
return (((this.init && (message >= RPOSWindowMessage.WillShow)) && ((message <= RPOSWindowMessage.DidHide) && (handler != null))) && this.responders[((int) message) - 2].Remove(handler));
}
public IEnumerable<RPOSWindowMessageHandler> EnumerateHandlers(RPOSWindowMessage message)
{
if ((this.init && (message >= RPOSWindowMessage.WillShow)) && (message <= RPOSWindowMessage.DidHide))
{
int index = ((int) message) - 2;
if (this.responders[index].init && (this.responders[index].count != 0))
{
return this.responders[index].handlers;
}
}
return none;
}
public int CountHandlers(RPOSWindowMessage message)
{
return (((this.init && (message >= RPOSWindowMessage.WillShow)) && (message <= RPOSWindowMessage.DidHide)) ? this.responders[((int) message) - 2].count : 0);
}
[StructLayout(LayoutKind.Sequential)]
private struct RPOSWindowMessageResponder
{
public HashSet<RPOSWindowMessageHandler> handlerGate;
public List<RPOSWindowMessageHandler> handlers;
public int count;
public bool init;
public bool Add(RPOSWindowMessageHandler handler)
{
if (handler == null)
{
return false;
}
if (!this.init)
{
this.handlerGate = new HashSet<RPOSWindowMessageHandler>();
this.handlers = new List<RPOSWindowMessageHandler>();
this.init = true;
this.handlerGate.Add(handler);
}
else if (!this.handlerGate.Add(handler))
{
return false;
}
this.handlers.Add(handler);
this.count++;
return true;
}
public bool Remove(RPOSWindowMessageHandler handler)
{
if ((!this.init || (handler == null)) || !this.handlerGate.Remove(handler))
{
return false;
}
this.handlers.Remove(handler);
this.count--;
return true;
}
private bool TryInvoke(RPOSWindow window, RPOSWindowMessage message, int i)
{
RPOSWindowMessageHandler handler = this.handlers[i];
try
{
return handler(window, message);
}
catch (Exception exception)
{
Debug.LogError(string.Concat(new object[] { "handler ", handler, " threw exception with message ", message, " on window ", window, " and will no longer execute. The exception is below\r\n", exception }), window);
return false;
}
}
public void Invoke(RPOSWindow window, RPOSWindowMessage message)
{
if (this.init && (this.count != 0))
{
if (((message - 2) & RPOSWindowMessage.DidOpen) == RPOSWindowMessage.DidOpen)
{
for (int i = this.count - 1; i >= 0; i--)
{
if (!this.TryInvoke(window, message, i))
{
this.handlerGate.Remove(this.handlers[i]);
this.handlers.RemoveAt(i);
this.count--;
}
}
}
else
{
for (int j = 0; j < this.count; j++)
{
if (!this.TryInvoke(window, message, j))
{
this.handlerGate.Remove(this.handlers[j]);
this.handlers.RemoveAt(j--);
this.count--;
}
}
}
}
}
}
}