internal override void BeforeWrite()
{
_bitmapPreviewData.Clear();
var str = DxfCommonConverters.HexBytes(BitmapData);
_bitmapPreviewData.AddRange(DxfCommonConverters.SplitIntoLines(str));
}
internal override void AfterRead()
{
var hex = string.Join(string.Empty, _bitmapPreviewData.ToArray());
_bitmapPreviewData.Clear(); // don't keep this around
BitmapData = DxfCommonConverters.HexBytes(hex);
}
public static IEnumerable <string> StringsFromByteArray(byte[] bytes)
{
// write lines in 128-byte chunks (expands to 256 hex bytes)
var hex = DxfCommonConverters.HexBytes(bytes);
var lines = DxfCommonConverters.SplitIntoLines(hex, 256);
return(lines);
}
internal override void BeforeWrite()
{
_bitmapPreviewData.Clear();
var str = DxfCommonConverters.HexBytes(BitmapData);
foreach (var line in DxfCommonConverters.SplitIntoLines(str))
{
_bitmapPreviewData.Add(line);
}
}
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
}
}
private void WriteBinary(byte[] value)
{
if (textWriter != null)
{
WriteLine(DxfCommonConverters.HexBytes(value));
}
else if (binWriter != null)
{
binWriter.Write((byte)value.Length);
binWriter.Write(value);
}
}
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 DxfXDataNamedList n:
pairs.Add(new DxfCodePair(code, n.Name));
AddListValuePairs(n.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);
}
}
public DxfCodePair GetCodePair()
{
if (_lineEnumerator.MoveNext())
{
var codeLine = _lineEnumerator.Current;
var codeLineNumber = _lineNumber;
int code;
if (string.IsNullOrEmpty(codeLine))
{
// a blank line when expecting a code means we can't parse any further
return(null);
}
else if (int.TryParse(codeLine, NumberStyles.Integer, CultureInfo.InvariantCulture, out code))
{
if (_lineEnumerator.MoveNext())
{
DxfCodePair pair = null;
var valueLine = _lineEnumerator.Current;
var expectedType = DxfCodePair.ExpectedType(code);
if (expectedType == typeof(short))
{
pair = GetCodePair <short>(code, valueLine, TryParseShortValue, (c, v) => new DxfCodePair(c, v), minValue: short.MinValue, maxValue: short.MaxValue);
}
else if (expectedType == typeof(double))
{
pair = GetCodePair <double>(code, valueLine, TryParseDoubleValue, (c, v) => new DxfCodePair(c, v));
}
else if (expectedType == typeof(int))
{
pair = GetCodePair <int>(code, valueLine, TryParseIntValue, (c, v) => new DxfCodePair(c, v), minValue: int.MinValue, maxValue: int.MaxValue);
}
else if (expectedType == typeof(long))
{
pair = GetCodePair <long>(code, valueLine, TryParseLongValue, (c, v) => new DxfCodePair(c, v), minValue: long.MinValue, maxValue: long.MaxValue);
}
else if (expectedType == typeof(string))
{
var value = valueLine.Trim();
if (_encoding == null)
{
// read as ASCII, transform UTF codes
value = DxfReader.TransformUnicodeCharacters(value);
}
pair = new DxfCodePair(code, DxfReader.TransformControlCharacters(value));
}
else if (expectedType == typeof(bool))
{
// this should really parse as a short, but it could be anything
double result;
if (double.TryParse(valueLine, NumberStyles.Float, CultureInfo.InvariantCulture, out result))
{
if (result < short.MinValue)
{
result = short.MinValue;
}
if (result > short.MaxValue)
{
result = short.MaxValue;
}
pair = DxfCodePair.IsPotentialShortAsBool(code)
? new DxfCodePair(code, (short)result)
: new DxfCodePair(code, result != 0.0);
}
else
{
throw new DxfReadException($"Unsupported value '{valueLine}' for code '{code}'", _lineNumber);
}
}
else if (expectedType == typeof(byte[]))
{
var data = DxfCommonConverters.HexBytes(valueLine);
pair = new DxfCodePair(code, data);
}
else
{
throw new DxfReadException("Unsupported code " + code, codeLineNumber);
}
if (pair != null)
{
pair.Offset = codeLineNumber;
}
return(pair);
}
else
{
throw new DxfReadException("Expected value", _lineNumber);
}
}
else
{
if (codeLineNumber == 1)
{
// parsing the very first code pair failed
throw new DxfReadException($"Not a valid DXF file header: `{codeLine}`.", _lineNumber);
}
else
{
throw new DxfReadException("Unexpected code value", _lineNumber);
}
}
}
else
{
return(null);
}
}
public static byte[] ByteArrayFromStrings(IEnumerable <string> lines)
{
return(DxfCommonConverters.HexBytes(string.Join(string.Empty, lines.ToArray())));
}
internal void AddValuePairs(List <DxfCodePair> pairs, DxfAcadVersion version, bool outputHandles)
{
var code = (int)Type;
switch (Type)
{
case DxfXDataType.String:
pairs.Add(new DxfCodePair(code, ((DxfXDataString)this).Value));
break;
case DxfXDataType.ControlString:
pairs.Add(new DxfCodePair(code, "{"));
foreach (var subItem in ((DxfXDataControlGroup)this).Items)
{
subItem.AddValuePairs(pairs, version, outputHandles);
}
pairs.Add(new DxfCodePair(code, "}"));
break;
case DxfXDataType.Layer:
pairs.Add(new DxfCodePair(code, ((DxfXDataLayerName)this).Value));
break;
case DxfXDataType.BinaryData:
pairs.Add(new DxfCodePair(code, DxfCommonConverters.HexBytes(((DxfXDataBinaryData)this).Value)));
break;
case DxfXDataType.Handle:
pairs.Add(new DxfCodePair(code, DxfCommonConverters.UIntHandle(((DxfXDataHandle)this).Value)));
break;
case DxfXDataType.RealTriple:
{
var point = ((DxfXData3Reals)this).Value;
pairs.Add(new DxfCodePair(code, point.X));
pairs.Add(new DxfCodePair(code + 10, point.Y));
pairs.Add(new DxfCodePair(code + 20, point.Z));
break;
}
case DxfXDataType.WorldSpacePosition:
{
var point = ((DxfXDataWorldSpacePosition)this).Value;
pairs.Add(new DxfCodePair(code, point.X));
pairs.Add(new DxfCodePair(code + 10, point.Y));
pairs.Add(new DxfCodePair(code + 20, point.Z));
break;
}
case DxfXDataType.WorldSpaceDisplacement:
{
var point = ((DxfXDataWorldSpaceDisplacement)this).Value;
pairs.Add(new DxfCodePair(code, point.X));
pairs.Add(new DxfCodePair(code + 10, point.Y));
pairs.Add(new DxfCodePair(code + 20, point.Z));
break;
}
case DxfXDataType.WorldDirection:
{
var point = ((DxfXDataWorldDirection)this).Value;
pairs.Add(new DxfCodePair(code, point.X));
pairs.Add(new DxfCodePair(code + 10, point.Y));
pairs.Add(new DxfCodePair(code + 20, point.Z));
break;
}
case DxfXDataType.Real:
pairs.Add(new DxfCodePair(code, ((DxfXDataReal)this).Value));
break;
case DxfXDataType.Distance:
pairs.Add(new DxfCodePair(code, ((DxfXDataDistance)this).Value));
break;
case DxfXDataType.ScaleFactor:
pairs.Add(new DxfCodePair(code, ((DxfXDataScaleFactor)this).Value));
break;
case DxfXDataType.Integer:
pairs.Add(new DxfCodePair(code, ((DxfXDataInteger)this).Value));
break;
case DxfXDataType.Long:
pairs.Add(new DxfCodePair(code, ((DxfXDataLong)this).Value));
break;
default:
throw new InvalidOperationException("Unexpected XDATA item " + Type);
}
}
