private void _writeObject(PdfValue obj)
{
var r = _referenceTable[obj];
r.Position = _writer.PdfPosition;
_writer.WriteObj(this, r, obj);
}
internal PdfWriterReference AddObj(PdfValue obj)
{
if (!_referenceTable.TryGetValue(obj, out var reference))
{
obj.pdfAddToDocument(this);
reference = new PdfWriterReference(_xrefTable.Count);
_xrefTable.Add(reference);
_referenceTable.Add(obj, reference);
if (obj is PdfPage)
{
_pages.Add((PdfPage)obj);
}
if (obj.hasStream)
{
reference.Position = _writer.PdfPosition;
_writer.WriteObj(this, reference, obj);
}
else
{
_objToWrite.Add(obj);
}
}
return(reference);
}
public PdfValue ValueByName(string name)
{
for (int i = 0; i < Children.Count; ++i)
{
if (Children[i].Type == PdfValueType.Name)
{
if (((PdfName)Children[i]).Value == name)
{
PdfValue Token = Children[i + 1];
return(Token);
}
}
}
return(null);
}
internal PdfWriterReference GetReference(PdfValue obj)
{
return(_referenceTable[obj]);
}
internal void setValue(PdfValue value)
{
this._value = value;
}
private void _readXrefObject(int pos, PdfStreamReader reader, PdfValue firstToken)
{
int id = ((PdfInteger)firstToken).Value;
int revision = reader.ReadInt();
reader.ReadToken(PdfValueType.ObjectBegin);
_allocateXrefTable(id + 1);
var rr = new PdfReferenceReader(this, id, revision, pos);
if (!(_readObj(reader, false) is PdfObjectReader obj))
{
throw new PdfExceptionReader("Invalid Xref obj.");
}
rr.setValue(obj);
_xrefTable[id] = rr;
var dictionary = obj.Dictionary.Children;
PdfValueList w = null;
PdfValueList index = null;
int size = 0;
PdfReferenceReader prev = null;
for (int i = 0; i < dictionary.Count; ++i)
{
var entry = dictionary[i];
if (entry is PdfName)
{
switch (((PdfName)entry).Value)
{
case "W": w = ((PdfArray)dictionary[++i]).Children; break;
case "Index": index = ((PdfArray)dictionary[++i]).Children; break;
case "Size": size = ((PdfInteger)dictionary[++i]).Value; break;
case "Prev": prev = (PdfReferenceReader)dictionary[++i]; break;
case "Root": _rootReference = (PdfReferenceReader)dictionary[++i]; break;
case "Encrypt": _encryptReference = (PdfReferenceReader)dictionary[++i]; break;
case "Info": _infoReference = (PdfReferenceReader)dictionary[++i]; break;
case "ID": _id = ((PdfArray)dictionary[++i]).Children.ToArray(); break;
}
}
}
if (obj.NamedType != "XRef" || w == null || index == null)
{
throw new PdfExceptionReader("Invalid xref object.");
}
int s1 = ((PdfInteger)w[0]).Value;
int s2 = ((PdfInteger)w[1]).Value;
int s3 = ((PdfInteger)w[2]).Value;
id = ((PdfInteger)index[0]).Value;
_allocateXrefTable(((PdfInteger)index[1]).Value);
using (var r = new PdfXrefStreamReader(obj.GetUncompressStream())) {
while (!r.EOF)
{
int t = r.ReadValue(s1);
int v2 = r.ReadValue(s2);
int v3 = r.ReadValue(s3);
switch (t)
{
case 0: break;
case 1: pdfGetReference(id, v3).setPosition(v2); break;
case 2: pdfGetReference(id, 0).setCompressed(v3, pdfGetReference(v2, 0)); break;
default: throw new PdfExceptionReader("cross-reference stream type #" + t + " unknown.");
}
++id;
}
}
}
