private ObjectCollection TraversePagesTree(Object top)
{
ObjectCollection retval = new ObjectCollection();
if (top.Type == "Page")
{
Utility.TraceLine("Found a page: " + top.ToString());
retval.Add(top);
return(retval);
}
if (top.Type == "Pages")
{
DictionaryItem kids = top.Dictionary.Get("Kids");
foreach (Object kid in kids.ValueAsObjects(m_objects))
{
retval.Add(TraversePagesTree(kid));
}
return(retval);
}
if (top.Type == "")
{
foreach (Object kid in top.DirectValueAsObjects(m_objects))
{
retval.Add(TraversePagesTree(kid));
}
return(retval);
}
throw new RuntimeException("Unknown object type \"" + top.Type + "\" in object " + top.Number +
" " + top.Generation + " pages tree");
}
public ObjectCollection ByType(string type)
{
ObjectCollection oc = new ObjectCollection();
foreach (Object o in List)
{
if ((o.Valid) && (o.Type == type))
{
oc.Add(o);
}
}
return(oc);
}
public ObjectCollection ValueAsObjects(ObjectCollection objs)
{
if (!Valid)
{
return(new ObjectCollection());
}
if (m_objects.Count == 0)
{
throw new RuntimeException("There are no objects to return");
}
ObjectCollection oc = new ObjectCollection();
foreach (ObjectReference or in m_objects)
{
oc.Add(objs.Get(or));
}
return(oc);
}
public Pdf(string filename)
{
PdfStream st = new PdfStream();
st.FillFromFile(filename);
long pos = st.Position;
ReadHeader(st);
// While we're still advancing through the stream, then all is good...
bool eof = false;
while (!eof && (st.Position != pos))
{
Utility.TraceLine("Starting read pass");
pos = st.Position;
ReadComment(st);
Object obj = ReadObject(st);
if (obj.Valid)
{
m_objects.Add(obj);
if (m_objects.Count == 1)
{
DictionaryItem di = obj.Dictionary.Get("Linearized");
if (di.Valid)
{
if (di.Type == DictionaryItem.ValueType.Number)
{
if (di.ValueAsInteger() == 1)
{
m_linflag = true;
m_linearized = true;
Utility.TraceLine("Linearized PDF document found");
Utility.TraceLine("PDF/A: Linearization of document is ignored (section 5.10)");
}
}
else
{
throw new ParseException("Linearized dictionary item is not a number");
}
}
}
}
ReadXref(st);
if (ReadTrailer(st))
{
if (m_linflag == true)
{
m_linflag = false;
Utility.TraceLine("Linearization trailer");
}
else
{
eof = true;
}
}
ReadStartXref(st);
if (!eof && (st.Position == pos))
{
st.ReadLine();
}
}
if (st.Position != st.Length)
{
m_pdfa = false;
Utility.TraceLine("PDF/A: Extraneous content after EOF marker breaches section 5.3 requirements");
}
}