internal static DxfXData FromBuffer(DxfCodePairBufferReader buffer, string applicationName)
{
DxfXDataItem last = null;
var items = new List <DxfXDataItem>();
while (buffer.ItemsRemain)
{
var pair = buffer.Peek();
if (pair.Code == (int)DxfXDataType.ApplicationName || pair.Code < 1000)
{
// new xdata or non-xdata
break;
}
var item = DxfXDataItem.FromBuffer(buffer);
if (item != null)
{
if (last is DxfXDataString xdataString && item is DxfXDataItemList list)
{
// re-build last and current item as named group
items.RemoveAt(items.Count - 1);
item = new DxfXDataNamedList(xdataString.Value, list.Items);
}
items.Add(item);
last = item;
}
}
return(new DxfXData(applicationName, items));
}
internal static DxfXDataItemList ListFromBuffer(DxfCodePairBufferReader buffer)
{
Debug.Assert(buffer.ItemsRemain);
DxfCodePair pair;
var items = new List <DxfXDataItem>();
while (buffer.ItemsRemain)
{
pair = buffer.Peek();
Debug.Assert(pair.Code >= 1000, "Unexpected non-XDATA code pair");
if (pair.Code == (int)DxfXDataType.ControlString && pair.StringValue == "}")
{
buffer.Advance();
break;
}
var item = DxfXDataItem.FromBuffer(buffer);
if (item != null)
{
items.Add(item);
}
}
return(new DxfXDataItemList(items));
}
internal static void PopulateFromBuffer(DxfCodePairBufferReader buffer, IDictionary <string, DxfXDataApplicationItemCollection> xdata, string applicationName)
{
xdata[applicationName] = new DxfXDataApplicationItemCollection();
while (buffer.ItemsRemain)
{
var pair = buffer.Peek();
if (pair.Code == (int)DxfXDataType.ApplicationName || pair.Code < 1000)
{
return;
}
var item = DxfXDataItem.FromBuffer(buffer);
if (item != null)
{
xdata[applicationName].Add(item);
}
}
}
internal static DxfXData FromBuffer(DxfCodePairBufferReader buffer, string applicationName)
{
var items = new List <DxfXDataItem>();
while (buffer.ItemsRemain)
{
var pair = buffer.Peek();
if (pair.Code == (int)DxfXDataType.ApplicationName || pair.Code < 1000)
{
// new xdata or non-xdata
break;
}
items.Add(DxfXDataItem.FromBuffer(buffer));
}
return(new DxfXData(applicationName, items));
}