protected virtual IPDFToken ProcessKeyword(PDFKeyword token)
{
switch (token.Name)
{
case "true": return(new PDFBoolean {
Value = true
});
case "false": return(new PDFBoolean {
Value = false
});
case "null": return(new PDFNull());
case "obj": return(new PDFToken(PDFTokenType.StartObject));
case "xref": return(new PDFToken(PDFTokenType.Xref));
case "startxref": return(new PDFToken(PDFTokenType.StartXref));
case "endobj": return(PDFObject.Parse(this));
case "trailer": return(PDFXref.Parse(this));
case "n": return(PDFXrefEntry.Parse(this, PDFTokenType.XrefEntryInUse));
case "f": return(PDFXrefEntry.Parse(this, PDFTokenType.XrefEntryFree));
case "R": return(PDFObjRef.Parse(this));
default: throw new InvalidDataException(String.Format("Unknown keyword '{0}'", token.Name));
}
}
public static PDFObject Parse(Stack <IPDFToken> tokens)
{
PDFObject obj = new PDFObject();
obj.Value = tokens.TryPop <IPDFElement>();
tokens.Pop(PDFTokenType.StartObject);
obj.Version = (int)tokens.Pop <PDFInteger>().Value;
obj.ID = (int)tokens.Pop <PDFInteger>().Value;
return(obj);
}
public static IEnumerable <PDFObject> FromObjStm(PDFStream sobj)
{
PDFInteger nobjsv;
if (sobj.Options.TryGet("N", out nobjsv))
{
int nobjs = (int)nobjsv.Value;
PDFObject[] objs = new PDFObject[nobjs];
PDFTokenStack stack = new PDFTokenStack();
PDFTokenizer tokens = new PDFTokenizer(new ByteStreamReader(sobj.Data));
foreach (IPDFToken token in tokens)
{
stack.ProcessToken(token);
}
for (int i = 0; i < nobjs; i++)
{
objs[i] = new PDFObject {
Value = stack.Pop <IPDFElement>()
};
}
for (int i = 0; i < nobjs; i++)
{
int offset = (int)stack.Pop <PDFInteger>().Value;
objs[i].ID = (int)stack.Pop <PDFInteger>().Value;
objs[i].Version = 0;
}
return(objs);
}
else
{
return(new PDFObject[0]);
}
}
public PDFObject AddRef(PDFObject parent)
{
this.RefCount++;
this.ReferencedBy.Add(parent);
return(this);
}