public PriorityQueueElement <T> Add(T value, int priority)
{
PriorityQueueElement <T> priorityQueueElement = new PriorityQueueElement <T>(value, priority, this.elementList.Count);
this.Add(priorityQueueElement);
return(priorityQueueElement);
}
private void Demote(PriorityQueueElement <T> element)
{
int num = element.Index;
int priority = element.Priority;
for (;;)
{
int num2 = num * 2 + 1;
if (num2 >= this.elementList.Count)
{
break;
}
if (num2 + 1 < this.elementList.Count && this.elementList[num2].Priority > this.elementList[num2 + 1].Priority)
{
num2++;
}
if (!this.ComparePriority(this.elementList[num2].Priority, priority))
{
break;
}
this.elementList[num2].Index = num;
this.elementList[num] = this.elementList[num2];
num = num2;
}
element.Index = num;
this.elementList[num] = element;
}
private void RemoveAt(int index)
{
int priority = this.elementList[index].Priority;
this.elementList[index].Invalidate();
PriorityQueueElement <T> priorityQueueElement = this.elementList[this.elementList.Count - 1];
this.elementList.RemoveAt(this.elementList.Count - 1);
if (!priorityQueueElement.Valid)
{
return;
}
priorityQueueElement.Index = index;
if (this.ComparePriority(priorityQueueElement.Priority, priority))
{
this.Promote(priorityQueueElement);
return;
}
if (this.ComparePriority(priority, priorityQueueElement.Priority))
{
this.Demote(priorityQueueElement);
return;
}
this.elementList[index] = priorityQueueElement;
}
public T Remove(PriorityQueueElement <T> element)
{
int index = element.Index;
if (!object.ReferenceEquals(this.elementList[index], element))
{
throw new ArgumentException("Index of element had been corrupted or Invalid container.");
}
this.RemoveAt(index);
return(element.Value);
}
private void Promote(PriorityQueueElement <T> element)
{
int num = element.Index;
int priority = element.Priority;
int num2 = (num - 1) / 2;
while (num > 0 && this.ComparePriority(priority, this.elementList[num2].Priority))
{
this.elementList[num2].Index = num;
this.elementList[num] = this.elementList[num2];
num = num2;
num2 = (num - 1) / 2;
}
element.Index = num;
this.elementList[num] = element;
}
public void Change(PriorityQueueElement <T> element, int newPriority)
{
int index = element.Index;
if (!object.ReferenceEquals(this.elementList[index], element))
{
throw new ArgumentException("Index of element had been corrupted or Invalid container.");
}
int priority = element.Priority;
element.Priority = newPriority;
if (this.ComparePriority(newPriority, priority))
{
this.Promote(element);
return;
}
if (this.ComparePriority(priority, newPriority))
{
this.Demote(element);
}
}
public void Add(PriorityQueueElement <T> priorityQueueElement)
{
priorityQueueElement.Index = this.elementList.Count;
this.elementList.Add(priorityQueueElement);
this.Promote(priorityQueueElement);
}