internal static DxfXDataItem FromBuffer(DxfCodePairBufferReader buffer)
{
var pair = buffer.Peek();
buffer.Advance();
switch ((DxfXDataType)pair.Code)
{
case DxfXDataType.String:
return(new DxfXDataString(pair.StringValue));
case DxfXDataType.ControlString:
return(DxfXDataItemList.ListFromBuffer(buffer));
case DxfXDataType.Layer:
return(new DxfXDataLayerName(pair.StringValue));
case DxfXDataType.BinaryData:
return(new DxfXDataBinaryData(DxfCommonConverters.HexBytes(pair.StringValue)));
case DxfXDataType.Handle:
return(new DxfXDataHandle(DxfCommonConverters.UIntHandle(pair.StringValue)));
case DxfXDataType.RealTriple:
return(new DxfXData3Reals(ReadPoint(pair, buffer, pair.Code)));
case DxfXDataType.WorldSpacePosition:
return(new DxfXDataWorldSpacePosition(ReadPoint(pair, buffer, pair.Code)));
case DxfXDataType.WorldSpaceDisplacement:
return(new DxfXDataWorldSpaceDisplacement(ReadPoint(pair, buffer, pair.Code)));
case DxfXDataType.WorldDirection:
return(new DxfXDataWorldDirection(ReadPoint(pair, buffer, pair.Code)));
case DxfXDataType.Real:
return(new DxfXDataReal(pair.DoubleValue));
case DxfXDataType.Distance:
return(new DxfXDataDistance(pair.DoubleValue));
case DxfXDataType.ScaleFactor:
return(new DxfXDataScaleFactor(pair.DoubleValue));
case DxfXDataType.Integer:
return(new DxfXDataInteger(pair.ShortValue));
case DxfXDataType.Long:
return(new DxfXDataLong(pair.IntegerValue));
default:
return(null); // unexpected XDATA code pair
}
}
protected internal override IEnumerable <DxfCodePair> GetSpecificPairs(DxfAcadVersion version, bool outputHandles, HashSet <IDxfItem> writtenItems)
{
var list = new List <DxfCodePair>();
list.Add(new DxfCodePair(90, RawData.Length));
// write lines in 128-byte chunks (expands to 256 hex bytes)
var hex = DxfCommonConverters.HexBytes(RawData);
var lines = DxfCommonConverters.SplitIntoLines(hex, 256);
list.AddRange(lines.Select(l => new DxfCodePair(310, l)));
return(list);
}
private IEnumerable <string> GetHexStrings()
{
if (Data == null)
{
yield break;
}
var pos = 0;
while (pos < Data.Length)
{
var slice = Data.Skip(pos).Take(128).ToArray();
pos += slice.Length;
yield return(DxfCommonConverters.HexBytes(slice));
}
}
internal static DxfThumbnailImageSection ThumbnailImageSectionFromBuffer(DxfCodePairBufferReader buffer)
{
if (buffer.ItemsRemain)
{
var lengthPair = buffer.Peek();
buffer.Advance();
if (lengthPair.Code != 90)
{
return(null);
}
var length = lengthPair.IntegerValue;
var lines = new List <string>();
while (buffer.ItemsRemain)
{
var pair = buffer.Peek();
buffer.Advance();
if (DxfCodePair.IsSectionEnd(pair))
{
break;
}
Debug.Assert(pair.Code == 310);
lines.Add(pair.StringValue);
}
var section = new DxfThumbnailImageSection();
section.Clear();
section.RawData = DxfCommonConverters.HexBytes(string.Join(string.Empty, lines.ToArray()));
return(section);
}
return(null);
}
protected override DxfObject PostParse()
{
Data = _hexData.SelectMany(h => DxfCommonConverters.HexBytes(h)).ToArray();
_hexData.Clear();
return(this);
}
internal void AddValuePairs(List <DxfCodePair> pairs, DxfAcadVersion version, bool outputHandles)
{
var code = (int)Type;
switch (this)
{
case DxfXDataString s:
pairs.Add(new DxfCodePair(code, s.Value));
break;
case DxfXDataItemList l:
AddListValuePairs(l.Items, pairs, version, outputHandles);
break;
case DxfXDataLayerName l:
pairs.Add(new DxfCodePair(code, l.Value));
break;
case DxfXDataBinaryData b:
pairs.Add(new DxfCodePair(code, DxfCommonConverters.HexBytes(b.Value)));
break;
case DxfXDataHandle h:
pairs.Add(new DxfCodePair(code, DxfCommonConverters.UIntHandle(h.Value)));
break;
case DxfXData3Reals r:
pairs.Add(new DxfCodePair(code, r.Value.X));
pairs.Add(new DxfCodePair(code + 10, r.Value.Y));
pairs.Add(new DxfCodePair(code + 20, r.Value.Z));
break;
case DxfXDataWorldSpacePosition w:
pairs.Add(new DxfCodePair(code, w.Value.X));
pairs.Add(new DxfCodePair(code + 10, w.Value.Y));
pairs.Add(new DxfCodePair(code + 20, w.Value.Z));
break;
case DxfXDataWorldSpaceDisplacement w:
pairs.Add(new DxfCodePair(code, w.Value.X));
pairs.Add(new DxfCodePair(code + 10, w.Value.Y));
pairs.Add(new DxfCodePair(code + 20, w.Value.Z));
break;
case DxfXDataWorldDirection w:
pairs.Add(new DxfCodePair(code, w.Value.X));
pairs.Add(new DxfCodePair(code + 10, w.Value.Y));
pairs.Add(new DxfCodePair(code + 20, w.Value.Z));
break;
case DxfXDataReal r:
pairs.Add(new DxfCodePair(code, r.Value));
break;
case DxfXDataDistance d:
pairs.Add(new DxfCodePair(code, d.Value));
break;
case DxfXDataScaleFactor s:
pairs.Add(new DxfCodePair(code, s.Value));
break;
case DxfXDataInteger i:
pairs.Add(new DxfCodePair(code, i.Value));
break;
case DxfXDataLong l:
pairs.Add(new DxfCodePair(code, l.Value));
break;
default:
throw new InvalidOperationException("Unexpected XDATA item " + Type);
}
}
