internal IPDFObject GetObject(int index)
{
if (index < 0 || index >= _entries.Count)
{
return(null);
}
Entry entry = _entries[index];
if (entry == null)
{
return(null);
}
if (entry.Object != null)
{
return(entry.Object);
}
if (entry.EntryType == 2)
{
parseGenerationEntry(entry);
if (entry.Object == null)
{
return(entry.Object = new PDFNull());
}
return(entry.Object);
}
else
{
IPDFObject obj = _lexer.ParseEntry(index, entry.Offset, entry.Generation);
if (obj == null)
{
obj = new PDFNull();
}
entry.Object = obj;
return(obj);
}
}
private void parseGenerationEntry(Entry entry)
{
PDFDictionaryStream dictStream = GetObject(entry.Offset) as PDFDictionaryStream;
if (dictStream != null)
{
PDFNumber n = dictStream.Dictionary["N"] as PDFNumber;
if (n == null)
{
return;
}
int count = (int)n.GetValue();
if (count <= 0)
{
return;
}
n = dictStream.Dictionary["First"] as PDFNumber;
if (n == null)
{
return;
}
int first = (int)n.GetValue();
if (first < 0)
{
return;
}
dictStream.Decode();
List <int> objects = new List <int>();
List <int> offsets = new List <int>();
Lexer lexer = new Lexer(dictStream.GetStream(), this, null, 512);
lexer.Position = 0;
for (int i = 0; i < count; ++i)
{
bool succes;
int objNo = lexer.ReadInteger(out succes);
if (!succes)
{
break;
}
int offset = lexer.ReadInteger(out succes);
if (!succes)
{
break;
}
objects.Add(objNo);
offsets.Add(offset);
}
int l = objects.Count;
for (int i = 0; i < l; ++i)
{
lexer.Position = offsets[i] + first;
IPDFObject obj = lexer.ReadObject();
if (obj == null)
{
obj = new PDFNull();
}
int index = objects[i];
if (index >= 0 && index < _entries.Count)
{
if (_entries[index] == null)
{
_entries[index] = new Entry(0, 0);
}
if (entry.Offset == _entries[index].Offset)
{
_entries[index].Object = obj;
}
}
}
}
}