internal void LoadDataFromVirtualizer(IEnumerable data)
{
object firstNewDataObject = (object)null;
int num = -1;
if (!EnumerableFunctions.IsEmpty(data))
{
firstNewDataObject = EnumerableFunctions.FastElementAt <object>(data, 0);
if (firstNewDataObject != null)
{
num = EnumerableFunctions.FindIndexOf <DataPoint>((IEnumerable <DataPoint>) this.DataPoints, (Func <DataPoint, bool>)(item =>
{
if (item != firstNewDataObject)
{
return(item.DataContext == firstNewDataObject);
}
return(true);
}));
}
}
if (num < 0)
{
this.ItemsSource = data;
}
else
{
for (; num > 0; --num)
{
this.DataPoints.RemoveAt(0);
}
int index = 0;
foreach (object obj in data)
{
if (index >= 0 && index < this.DataPoints.Count && (this.DataPoints[index] == obj || this.DataPoints[index].DataContext == obj))
{
++index;
}
else
{
if (index >= 0)
{
while (index < this.DataPoints.Count)
{
this.DataPoints.RemoveAt(index);
}
index = -1;
}
DataPoint dataPoint = obj as DataPoint;
if (dataPoint == null || !this.IsDataPointCompatible(dataPoint))
{
dataPoint = this.CreateDataPoint();
dataPoint.DataContext = obj;
if (this.ItemsBinder != null)
{
this.ItemsBinder.Bind(dataPoint, dataPoint.DataContext);
}
}
this.DataPoints.Add(dataPoint);
}
}
}
}