private void SaveRequest(long offset, DirectionOfContent direction)
{
_lastRequest = new PageRequest();
_lastRequest.LastOffsetAsked = offset;
_lastRequest.LastAskTime = DateTime.Now;
_lastRequest.LastDirection = direction;
}
public void RequestForOffset(long offset, DirectionOfContent direction)
{
Log.Debug("RequestForOFfset " + offset + " " + direction);
if (_stream == null)
{
return;
}
if (!IsValidOffset(offset))
{
return;
}
if (IsInCurrentPage(offset))
{
return;
}
SaveRequest(offset, direction);
}
private void LoadPageForOffset(PageRequest request)
{
if (_stream == null)
{
return;
}
long requestedOffset = request.LastOffsetAsked;
DirectionOfContent direction = request.LastDirection;
long actualOffset = 0;
if (direction == DirectionOfContent.Previous)
{
long temp = requestedOffset - MAX_PAGE_SIZE_IN_BYTES + PAGE_OVERLAPPING_IN_BYTES;
actualOffset = Math.Max(0, temp);
}
if (direction == DirectionOfContent.Folowing)
{
if (_fileWatcher.SizeOfFile > MAX_PAGE_SIZE_IN_BYTES)
{
long temp = _fileWatcher.SizeOfFile - MAX_PAGE_SIZE_IN_BYTES;
actualOffset = Math.Min(requestedOffset - PAGE_OVERLAPPING_IN_BYTES, temp);
}
else
{
Log.Error("How the hell did you request this offset ??:" + requestedOffset);
actualOffset = requestedOffset - PAGE_OVERLAPPING_IN_BYTES;
}
}
if (actualOffset < 0)
{
Log.Error(" BUG : actual offset = " + actualOffset + "reseting it to 0");
actualOffset = 0;
}
_stream.SetPosition(actualOffset, SeekOrigin.Begin);
//var a = _stream.GetPosition();
FillCurrentPage(requestedOffset);
NewContentIsAvailable = true;
OnPageLoaded();
}
