private static DxfMText GetMText(DxfBufferReader <DxfEntity> buffer)
{
if (buffer.ItemsRemain)
{
var entity = buffer.Peek();
if (entity.EntityType == DxfEntityType.MText)
{
buffer.Advance();
return((DxfMText)entity);
}
}
return(new DxfMText());
}
private static DxfSeqend GetSeqend(DxfBufferReader <DxfEntity> buffer)
{
if (buffer.ItemsRemain)
{
var entity = buffer.Peek();
if (entity.EntityType == DxfEntityType.Seqend)
{
buffer.Advance();
return((DxfSeqend)entity);
}
}
return(new DxfSeqend());
}
internal static List<DxfEntity> GatherEntities(IEnumerable<DxfEntity> entities)
{
var buffer = new DxfBufferReader<DxfEntity>(entities, (e) => e == null);
var result = new List<DxfEntity>();
while (buffer.ItemsRemain)
{
var entity = buffer.Peek();
buffer.Advance();
switch (entity.EntityType)
{
case DxfEntityType.Attribute:
var att = (DxfAttribute)entity;
att.MText = GetMText(buffer);
break;
case DxfEntityType.AttributeDefinition:
var attdef = (DxfAttributeDefinition)entity;
attdef.MText = GetMText(buffer);
break;
case DxfEntityType.Insert:
var insert = (DxfInsert)entity;
if (insert.HasAttributes)
{
var attribs = new List<DxfAttribute>();
while (buffer.ItemsRemain)
{
var nextAtt = GetNextAttribute(buffer);
if (nextAtt == null) break;
attribs.Add(nextAtt);
}
insert.Attributes.AddRange(attribs);
insert.Seqend = GetSeqend(buffer);
}
break;
case DxfEntityType.Polyline:
var poly = (DxfPolyline)entity;
var verts = CollectWhileType(buffer, DxfEntityType.Vertex).Cast<DxfVertex>();
poly.Vertices.AddRange(verts);
poly.Seqend = GetSeqend(buffer);
break;
default:
break;
}
result.Add(entity);
}
return result;
}
private static DxfAttribute GetNextAttribute(DxfBufferReader <DxfEntity> buffer)
{
if (buffer.ItemsRemain)
{
var entity = buffer.Peek();
if (entity.EntityType == DxfEntityType.Attribute)
{
buffer.Advance();
var attribute = (DxfAttribute)entity;
attribute.MText = GetMText(buffer);
return(attribute);
}
}
return(null);
}
private static IEnumerable <DxfEntity> CollectWhileType(DxfBufferReader <DxfEntity> buffer, DxfEntityType type)
{
var result = new List <DxfEntity>();
while (buffer.ItemsRemain)
{
var entity = buffer.Peek();
if (entity.EntityType != type)
{
break;
}
buffer.Advance();
result.Add(entity);
}
return(result);
}
private static List <DxfObject> GatherObjects(IEnumerable <DxfObject> objects)
{
var buffer = new DxfBufferReader <DxfObject>(objects, o => o == null);
var result = new List <DxfObject>();
var defaultObjectHandles = new HashSet <uint>();
while (buffer.ItemsRemain)
{
var obj = buffer.Peek();
buffer.Advance();
switch (obj.ObjectType)
{
case DxfObjectType.DictionaryWithDefault:
var dict = (DxfDictionaryWithDefault)obj;
if (dict.DefaultObjectPointer.Handle != 0u)
{
defaultObjectHandles.Add(dict.DefaultObjectPointer.Handle);
}
break;
default:
break;
}
result.Add(obj);
}
// trim default objects from the resultant list because they shouldn't be directly accessible
for (int i = result.Count - 1; i >= 0; i--)
{
if (defaultObjectHandles.Contains(((IDxfItemInternal)result[i]).Handle))
{
result.RemoveAt(i);
}
}
return(result);
}
internal static List <DxfEntity> GatherEntities(IEnumerable <DxfEntity> entities)
{
var buffer = new DxfBufferReader <DxfEntity>(entities, (e) => e == null);
var result = new List <DxfEntity>();
while (buffer.ItemsRemain)
{
var entity = buffer.Peek();
buffer.Advance();
switch (entity.EntityType)
{
case DxfEntityType.Attribute:
var att = (DxfAttribute)entity;
att.MText = GetMText(buffer);
SetOwner(att.MText, att);
break;
case DxfEntityType.AttributeDefinition:
var attdef = (DxfAttributeDefinition)entity;
attdef.MText = GetMText(buffer);
SetOwner(attdef.MText, attdef);
break;
case DxfEntityType.Insert:
var insert = (DxfInsert)entity;
if (insert.HasAttributes)
{
var attribs = new List <DxfAttribute>();
while (buffer.ItemsRemain)
{
var nextAtt = GetNextAttribute(buffer);
if (nextAtt == null)
{
break;
}
attribs.Add(nextAtt);
}
foreach (var attrib in attribs)
{
insert.Attributes.Add(attrib);
SetOwner(attrib, insert);
}
insert.Seqend = GetSeqend(buffer);
SetOwner(insert.Seqend, insert);
}
break;
case DxfEntityType.Polyline:
var poly = (DxfPolyline)entity;
var verts = CollectWhileType(buffer, DxfEntityType.Vertex).Cast <DxfVertex>();
foreach (var vert in verts)
{
poly.Vertices.Add(vert);
SetOwner(vert, poly);
}
poly.Seqend = GetSeqend(buffer);
SetOwner(poly.Seqend, poly);
break;
default:
break;
}
result.Add(entity);
}
return(result);
}
private static List<DxfObject> GatherObjects(IEnumerable<DxfObject> objects)
{
var buffer = new DxfBufferReader<DxfObject>(objects, o => o == null);
var result = new List<DxfObject>();
var defaultObjectHandles = new HashSet<uint>();
while (buffer.ItemsRemain)
{
var obj = buffer.Peek();
buffer.Advance();
switch (obj.ObjectType)
{
case DxfObjectType.DictionaryWithDefault:
var dict = (DxfDictionaryWithDefault)obj;
if (dict.DefaultObjectPointer.Handle != 0u)
{
defaultObjectHandles.Add(dict.DefaultObjectPointer.Handle);
}
break;
default:
break;
}
result.Add(obj);
}
// trim default objects from the resultant list because they shouldn't be directly accessible
for (int i = result.Count - 1; i >= 0; i--)
{
if (defaultObjectHandles.Contains(((IDxfItemInternal)result[i]).Handle))
{
result.RemoveAt(i);
}
}
return result;
}
private static DxfSeqend GetSeqend(DxfBufferReader<DxfEntity> buffer)
{
if (buffer.ItemsRemain)
{
var entity = buffer.Peek();
if (entity.EntityType == DxfEntityType.Seqend)
{
buffer.Advance();
return (DxfSeqend)entity;
}
}
return new DxfSeqend();
}
private static DxfAttribute GetNextAttribute(DxfBufferReader<DxfEntity> buffer)
{
if (buffer.ItemsRemain)
{
var entity = buffer.Peek();
if (entity.EntityType == DxfEntityType.Attribute)
{
buffer.Advance();
var attribute = (DxfAttribute)entity;
attribute.MText = GetMText(buffer);
return attribute;
}
}
return null;
}
private static DxfMText GetMText(DxfBufferReader<DxfEntity> buffer)
{
if (buffer.ItemsRemain)
{
var entity = buffer.Peek();
if (entity.EntityType == DxfEntityType.MText)
{
buffer.Advance();
return (DxfMText)entity;
}
}
return new DxfMText();
}
private static IEnumerable<DxfEntity> CollectWhileType(DxfBufferReader<DxfEntity> buffer, DxfEntityType type)
{
var result = new List<DxfEntity>();
while (buffer.ItemsRemain)
{
var entity = buffer.Peek();
if (entity.EntityType != type)
break;
buffer.Advance();
result.Add(entity);
}
return result;
}
