private static void GetUsedNonFlushedOCGsFromXObject(PdfDictionary toXObject, PdfDictionary fromXObject, ICollection
<PdfIndirectReference> fromUsedOcgs, PdfDictionary toOcProperties) {
if (toXObject != null && !toXObject.IsFlushed()) {
if (toXObject.IsStream() && !toXObject.IsFlushed()) {
PdfStream toStream = (PdfStream)toXObject;
PdfStream fromStream = (PdfStream)fromXObject;
iText.Kernel.Pdf.OcgPropertiesCopier.GetUsedNonFlushedOCGsFromOcDict(toStream.GetAsDictionary(PdfName.OC),
fromStream.GetAsDictionary(PdfName.OC), fromUsedOcgs, toOcProperties);
iText.Kernel.Pdf.OcgPropertiesCopier.GetUsedNonFlushedOCGsFromResources(toStream.GetAsDictionary(PdfName.Resources
), fromStream.GetAsDictionary(PdfName.Resources), fromUsedOcgs, toOcProperties);
}
else {
foreach (PdfName name in toXObject.KeySet()) {
PdfObject toCurrObj = toXObject.Get(name);
PdfObject fromCurrObj = fromXObject.Get(name);
if (toCurrObj.IsStream() && !toCurrObj.IsFlushed()) {
PdfStream toStream = (PdfStream)toCurrObj;
PdfStream fromStream = (PdfStream)fromCurrObj;
iText.Kernel.Pdf.OcgPropertiesCopier.GetUsedNonFlushedOCGsFromXObject(toStream, fromStream, fromUsedOcgs,
toOcProperties);
}
}
}
}
}
private void FlushXObjects(ICollection <PdfObject> xObjects)
{
foreach (PdfObject obj in xObjects)
{
PdfStream xObject = (PdfStream)obj;
PdfDictionary innerResources = xObject.GetAsDictionary(PdfName.Resources);
ICollection <PdfObject> innerXObjects = null;
if (innerResources != null)
{
PdfDictionary innerXObjectsDict = innerResources.GetAsDictionary(PdfName.XObject);
innerXObjects = innerXObjectsDict != null?innerXObjectsDict.Values() : null;
}
obj.Flush();
if (innerXObjects != null)
{
FlushXObjects(innerXObjects);
}
}
}