/// <summary>
/// Invokes the delegate with the given arguments
/// If one target throws an exception the other targets
/// won't be handled anymore.
/// </summary>
/// <param name="args">the argument array to pass to the target</param>
public void Invoke(object[] args)
{
WeakMulticastDelegate current = this;
while (current != null)
{
int start = Environment.TickCount;
if (current._weakRef == null)
{
current._method.Invoke(null, args);
}
else if (current._weakRef.IsAlive)
{
current._method.Invoke(current._weakRef.Target, args);
}
if (Environment.TickCount - start > 500)
{
if (Log.IsWarnEnabled)
{
Log.Warn("Invoke took " + (Environment.TickCount - start) + "ms! " + current);
}
}
current = current._prev;
}
}
/// <summary>
/// Removes a normal delegate from this weak multicast delegate
/// </summary>
/// <param name="realDelegate">the normal delegate</param>
/// <returns>the new weak multicast delegate</returns>
private WeakMulticastDelegate Remove(Delegate realDelegate)
{
if (Equals(realDelegate))
{
return(_prev);
}
WeakMulticastDelegate current = _prev;
WeakMulticastDelegate last = this;
while (current != null)
{
if (current.Equals(realDelegate))
{
last._prev = current._prev;
current._prev = null;
break;
}
last = current;
current = current._prev;
}
return(this);
}
/// <summary>
/// Removes a normal delegate from a weak multicast delegate
/// </summary>
/// <param name="weakDelegate">the weak multicast delegate</param>
/// <param name="realDelegate">the normal delegate</param>
/// <returns>the new weak multicast delegate</returns>
public static WeakMulticastDelegate Remove(WeakMulticastDelegate weakDelegate, Delegate realDelegate)
{
if (realDelegate == null || weakDelegate == null)
{
return(null);
}
return(weakDelegate.Remove(realDelegate));
}
/// <summary>
/// Combines this weak multicast delegate with a normal delegate
/// </summary>
/// <param name="realDelegate">the normal delegate</param>
/// <returns>this delegate</returns>
private WeakMulticastDelegate Combine(Delegate realDelegate)
{
var head = new WeakMulticastDelegate(realDelegate);
head._prev = _prev;
_prev = head;
return(this);
}
/// <summary>
/// Combines a weak multicast delegate with a normal delegate
/// and makes sure the normal delegate has not been added yet.
/// </summary>
/// <param name="weakDelegate">the weak multicast delegate</param>
/// <param name="realDelegate">the normal delegate</param>
/// <returns>the new combined weak multicast delegate</returns>
public static WeakMulticastDelegate CombineUnique(WeakMulticastDelegate weakDelegate, Delegate realDelegate)
{
if (realDelegate == null)
{
return(null);
}
return((weakDelegate == null) ? new WeakMulticastDelegate(realDelegate) : weakDelegate.CombineUnique(realDelegate));
}
/// <summary>
/// Dumps the delegates in this multicast delegate to a string
/// </summary>
/// <returns>The string containing the formated dump</returns>
public string Dump()
{
var builder = new StringBuilder();
WeakMulticastDelegate current = this;
int count = 0;
while (current != null)
{
count++;
if (current._weakRef == null)
{
builder.Append("\t");
builder.Append(count);
builder.Append(") ");
builder.Append(current._method.Name);
builder.Append(Environment.NewLine);
}
else
{
if (current._weakRef.IsAlive)
{
builder.Append("\t");
builder.Append(count);
builder.Append(") ");
builder.Append(current._weakRef.Target);
builder.Append(".");
builder.Append(current._method.Name);
builder.Append(Environment.NewLine);
}
else
{
builder.Append("\t");
builder.Append(count);
builder.Append(") INVALID.");
builder.Append(current._method.Name);
builder.Append(Environment.NewLine);
}
}
current = current._prev;
}
return(builder.ToString());
}
/// <summary>
/// Combines this weak multicast delegate with a normal delegate
/// Makes sure the delegate target has not been added yet
/// </summary>
/// <param name="realDelegate">the real delegate</param>
/// <returns>the new weak multicast delegate</returns>
private WeakMulticastDelegate CombineUnique(Delegate realDelegate)
{
bool found = Equals(realDelegate);
if (!found && _prev != null)
{
WeakMulticastDelegate curNode = _prev;
while (!found && curNode != null)
{
if (curNode.Equals(realDelegate))
{
found = true;
}
curNode = curNode._prev;
}
}
return(found ? this : Combine(realDelegate));
}
/// <summary>
/// Invokes the delegate with the given arguments
/// If one target throws an exception the other targets
/// won't be affected.
/// </summary>
/// <param name="args">the argument array to pass to the target</param>
public void InvokeSafe(object[] args)
{
WeakMulticastDelegate current = this;
while (current != null)
{
int start = Environment.TickCount;
try
{
var target = current._weakRef.Target;
if (current._weakRef == null)
{
current._method.Invoke(null, args);
}
else if (target != null && current._weakRef.IsAlive)
{
current._method.Invoke(target, args);
}
}
catch (Exception ex)
{
if (Log.IsErrorEnabled)
{
Log.Error("InvokeSafe", ex);
}
}
if (Environment.TickCount - start > 500)
{
if (Log.IsWarnEnabled)
{
Log.Warn("InvokeSafe took " + (Environment.TickCount - start) + "ms! " + current);
}
}
current = current._prev;
}
}
/// <summary>
/// Combines a weak multicast delegate with a normal delegate
/// </summary>
/// <param name="weakDelegate">the weak multicast delegate</param>
/// <param name="realDelegate">the normal delegate</param>
/// <returns>the new combinded weak multicast delegate</returns>
public static WeakMulticastDelegate Combine(WeakMulticastDelegate weakDelegate, Delegate realDelegate)
{
if (realDelegate == null)
return null;
return (weakDelegate == null) ? new WeakMulticastDelegate(realDelegate) : weakDelegate.Combine(realDelegate);
}
/// <summary>
/// Removes a normal delegate from a weak multicast delegate
/// </summary>
/// <param name="weakDelegate">the weak multicast delegate</param>
/// <param name="realDelegate">the normal delegate</param>
/// <returns>the new weak multicast delegate</returns>
public static WeakMulticastDelegate Remove(WeakMulticastDelegate weakDelegate, Delegate realDelegate)
{
if (realDelegate == null || weakDelegate == null)
return null;
return weakDelegate.Remove(realDelegate);
}
/// <summary>
/// Combines this weak multicast delegate with a normal delegate
/// </summary>
/// <param name="realDelegate">the normal delegate</param>
/// <returns>this delegate</returns>
private WeakMulticastDelegate Combine(Delegate realDelegate)
{
var head = new WeakMulticastDelegate(realDelegate);
head._prev = _prev;
_prev = head;
return this;
}
