private void PrepareForWriting()
{
var nextHandle = DxfPointer.AssignHandles(this);
Header.NextAvailableHandle = nextHandle;
SetExtents();
UpdateTimes();
Normalize();
}
private DxfWriter PrepareWriter(Stream stream, bool asText)
{
UpdateTimes();
Normalize();
var writer = new DxfWriter(stream, asText);
writer.Open();
var nextHandle = DxfPointer.AssignHandles(this);
Header.NextAvailableHandle = nextHandle;
return(writer);
}
internal static DxfFile LoadFromReader(IDxfCodePairReader reader)
{
var file = new DxfFile();
file.Clear();
var buffer = new DxfCodePairBufferReader(reader);
var version = DxfAcadVersion.R14;
while (buffer.ItemsRemain)
{
var pair = buffer.Peek();
if (DxfCodePair.IsSectionStart(pair))
{
buffer.Advance(); // swallow (0, SECTION) pair
var section = DxfSection.FromBuffer(buffer, file, version);
if (section != null)
{
switch (section.Type)
{
case DxfSectionType.Blocks:
file.BlocksSection = (DxfBlocksSection)section;
break;
case DxfSectionType.Entities:
file.EntitiesSection = (DxfEntitiesSection)section;
break;
case DxfSectionType.Classes:
file.ClassSection = (DxfClassesSection)section;
break;
case DxfSectionType.Header:
file.HeaderSection = (DxfHeaderSection)section;
version = file.Header.Version;
break;
case DxfSectionType.Objects:
file.ObjectsSection = (DxfObjectsSection)section;
break;
case DxfSectionType.Tables:
file.TablesSection = (DxfTablesSection)section;
break;
case DxfSectionType.Thumbnail:
file.ThumbnailImageSection = (DxfThumbnailImageSection)section;
break;
}
}
}
else if (DxfCodePair.IsEof(pair))
{
// swallow and quit
buffer.Advance();
break;
}
else if (DxfCodePair.IsComment(pair))
{
// swallow comments
buffer.Advance();
}
else
{
// swallow unexpected code pair
buffer.Advance();
}
}
Debug.Assert(!buffer.ItemsRemain);
DxfPointer.BindPointers(file);
return(file);
}