public PdfObject Visit(
PdfDataObject obj,
object data
)
{
return(obj.Accept(this, data));
}
/**
* <param name="file">Associated file.</param>
* <param name="dataObject">
* <para>Data object associated to the indirect object. It MUST be</para>
* <list type="bullet">
* <item><code>null</code>, if the indirect object is original or free.</item>
* <item>NOT <code>null</code>, if the indirect object is new and in-use.</item>
* </list>
* </param>
* <param name="xrefEntry">Cross-reference entry associated to the indirect object. If the
* indirect object is new, its offset field MUST be set to 0.</param>
*/
internal PdfIndirectObject(File file, PdfDataObject dataObject, XRefEntry xrefEntry)
{
this.file = file;
this.dataObject = Include(dataObject);
this.xrefEntry = xrefEntry;
this.original = (xrefEntry.Offset >= 0);
this.reference = new PdfReference(this);
}
public virtual PdfObject Visit(PdfIndirectObject obj, object data)
{
PdfDataObject dataObject = obj.DataObject;
if (dataObject != null)
{
dataObject.Accept(this, data);
}
return(obj);
}
public static PdfDictionary TryGetDictionary(PdfDataObject baseDataObject)
{
if (baseDataObject is PdfDictionary dictionary)
{
return(dictionary);
}
else if (baseDataObject is PdfStream stream)
{
return(stream.Header);
}
else
{
return(null);
}
}
public override bool Matches(Cloner cloner, PdfObject source)
{
if (source is PdfArray)
{
PdfArray array = (PdfArray)source;
if (array.Count > 0)
{
PdfDataObject arrayItem = array.Resolve(0);
if (arrayItem is PdfDictionary arrayItemDictionary)
{
return(arrayItemDictionary.ContainsKey(PdfName.Subtype) &&
arrayItemDictionary.ContainsKey(PdfName.Rect));
}
}
}
return(false);
}
/**
* <summary>Ensures a data object to be unresolved into its corresponding indirect reference, if
* available.</summary>
* <param name="object">Object to unresolve.</param>
* <returns><see cref="PdfReference"/>, if available; <code>object</code>, otherwise.</returns>
*/
public static PdfDirectObject Unresolve(PdfDataObject @object)
{
return(@object?.Unresolve());
}