public bool Merge(DirtyRange range)
{
DirtyRange r = this;
if (range.Start <= Start + Length &&
Start <= range.Start + range.Length)
{
int end = Math.Max(Start + Length, range.Start + range.Length);
Start = Math.Min(Start, range.Start);
Length = end - Start;
return(true);
}
return(false);
}
public bool Merge(DirtyRange range)
{
DirtyRange r = this;
if (range.start <= start + length &&
start <= range.start + range.length)
{
int end = Math.Max(this.start + this.length, range.start + range.length);
this.start = Math.Min(this.start, range.start);
this.length = end - this.start;
return(true);
}
return(false);
}
public void AddDirtyRange(int startIndex, int count, Type sourceType, bool fillEntireRange)
{
if ((startIndex < 0 || count <= 0) && !fillEntireRange)
{
throw new ArgumentException("Invalid range specified");
}
IEnumerable <DataType> data = _data;
//if (data == null)
// throw new InvalidOperationException("Cannot set a dirty region when source data has been garbage collected");
_isList = true;
if (data is IList == false)
{
if (data is ICollection == false || !(startIndex == 0 && count == (data as ICollection).Count && !fillEntireRange))
{
if (!(data is ICollection == false && data is IEnumerable && fillEntireRange))
{
throw new InvalidOperationException(sourceType.Name + "<" + sourceType.GetGenericArguments()[0].Name + "> source data must implement the IList<" + sourceType.GetGenericArguments()[0].Name + "> interface to set a dirty subrange");
}
}
else
{
if (data is ICollection && (startIndex == 0 && count == (data as ICollection).Count))
{
fillEntireRange = true;
}
}
_isList = false;
}
IList dataList = data as IList;
if (!fillEntireRange && ((startIndex + count) > dataList.Count))
{
throw new ArgumentException("Invalid range specified");
}
if (_dirtyRanges == null)
{
_dirtyRanges = new List <DirtyRange>();
}
if (fillEntireRange)
{
_dirtyRanges.Clear();
if (data is ICollection)
{
_dirtyRanges.Add(new DirtyRange(0, (data as ICollection).Count));
}
else
{
_dirtyRanges.Add(new DirtyRange(0, -1));//special case as length is not yet known
}
}
else
{
DirtyRange range = new DirtyRange(startIndex, count);
for (int i = 0; i < _dirtyRanges.Count; i++)
{
if (_dirtyRanges[i].Merge(range))
{
return;
}
}
_dirtyRanges.Add(range);
}
}
