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);
}
}
}
public bool TryGetStyleFromXDataDifference(DxfXDataApplicationItemCollection xdataItemCollection, out DxfDimStyle style)
{
// style data is encoded as
// 1001 DSTYLE
// 1002 {
// ... style overrides
// 1002 }
style = default(DxfDimStyle);
if (xdataItemCollection == null)
{
return(false);
}
for (int i = 0; i < xdataItemCollection.Count - 1; i++)
{
if (xdataItemCollection[i] is DxfXDataString xdataString && xdataString.Value == XDataStyleName &&
xdataItemCollection[i + 1] is DxfXDataItemList itemList)
{
if (itemList.Items.Count % 2 != 0)
{
// must be an even number
return(false);
}
var codePairs = new List <DxfCodePair>();
for (int j = 0; j < itemList.Items.Count; j += 2)
{
if (!(itemList.Items[j] is DxfXDataInteger codeItem))
{
// must alternate between int/<data>
return(false);
}
DxfCodePair pair;
var valueItem = itemList.Items[j + 1];
var code = codeItem.Value;
switch (DxfCodePair.ExpectedType(code).Name)
{
case nameof(Boolean):
pair = new DxfCodePair(code, true);
break;
case nameof(Double) when valueItem is DxfXDataDistance dist:
pair = new DxfCodePair(code, dist.Value);
break;
case nameof(Double) when valueItem is DxfXDataReal real:
pair = new DxfCodePair(code, real.Value);
break;
case nameof(Double) when valueItem is DxfXDataScaleFactor scale:
pair = new DxfCodePair(code, scale.Value);
break;
case nameof(Int16) when valueItem is DxfXDataInteger i32:
pair = new DxfCodePair(code, i32.Value);
break;
case nameof(Int32) when valueItem is DxfXDataLong i32:
pair = new DxfCodePair(code, i32.Value);
break;
case nameof(Int64) when valueItem is DxfXDataLong i32:
pair = new DxfCodePair(code, i32.Value);
break;
case nameof(String) when valueItem is DxfXDataString str:
pair = new DxfCodePair(code, str.Value);
break;
default:
// unexpected code pair type
return(false);
}
codePairs.Add(pair);
}
if (codePairs.Count == 0)
{
// no difference to apply
return(false);
}
// if we made it this far, there is a difference that should be applied
style = Clone();
foreach (var pair in codePairs)
{
style.ApplyCodePair(pair);
}
return(true);
}
}
return(false);
}
