private static ICollection<PdfIndirectReference> GetAllUsedNonFlushedOCGs(IDictionary<PdfPage, PdfPage> page2page
, PdfDictionary toOcProperties) {
// NOTE: the PDF is considered to be valid and therefore the presence of OСG in OCProperties.OCGs is not checked
ICollection<PdfIndirectReference> fromUsedOcgs = new LinkedHashSet<PdfIndirectReference>();
// Visit the pages in parallel to find non-flush OSGs
PdfPage[] fromPages = page2page.Keys.ToArray(new PdfPage[0]);
PdfPage[] toPages = page2page.Values.ToArray(new PdfPage[0]);
for (int i = 0; i < toPages.Length; i++) {
PdfPage fromPage = fromPages[i];
PdfPage toPage = toPages[i];
// Copy OCGs from annotations
IList<PdfAnnotation> toAnnotations = toPage.GetAnnotations();
IList<PdfAnnotation> fromAnnotations = fromPage.GetAnnotations();
for (int j = 0; j < toAnnotations.Count; j++) {
if (!toAnnotations[j].IsFlushed()) {
PdfDictionary toAnnotDict = toAnnotations[j].GetPdfObject();
PdfDictionary fromAnnotDict = fromAnnotations[j].GetPdfObject();
PdfAnnotation toAnnot = toAnnotations[j];
PdfAnnotation fromAnnot = fromAnnotations[j];
if (!toAnnotDict.IsFlushed()) {
iText.Kernel.Pdf.OcgPropertiesCopier.GetUsedNonFlushedOCGsFromOcDict(toAnnotDict.GetAsDictionary(PdfName.OC
), fromAnnotDict.GetAsDictionary(PdfName.OC), fromUsedOcgs, toOcProperties);
iText.Kernel.Pdf.OcgPropertiesCopier.GetUsedNonFlushedOCGsFromXObject(toAnnot.GetNormalAppearanceObject(),
fromAnnot.GetNormalAppearanceObject(), fromUsedOcgs, toOcProperties);
iText.Kernel.Pdf.OcgPropertiesCopier.GetUsedNonFlushedOCGsFromXObject(toAnnot.GetRolloverAppearanceObject(
), fromAnnot.GetRolloverAppearanceObject(), fromUsedOcgs, toOcProperties);
iText.Kernel.Pdf.OcgPropertiesCopier.GetUsedNonFlushedOCGsFromXObject(toAnnot.GetDownAppearanceObject(), fromAnnot
.GetDownAppearanceObject(), fromUsedOcgs, toOcProperties);
}
}
}
PdfDictionary toResources = toPage.GetPdfObject().GetAsDictionary(PdfName.Resources);
PdfDictionary fromResources = fromPage.GetPdfObject().GetAsDictionary(PdfName.Resources);
iText.Kernel.Pdf.OcgPropertiesCopier.GetUsedNonFlushedOCGsFromResources(toResources, fromResources, fromUsedOcgs
, toOcProperties);
}
return fromUsedOcgs;
}
/// <summary>Retrieves the names stored in the name tree</summary>
/// <returns>Map containing the PdfObjects stored in the tree</returns>
public virtual IDictionary <String, PdfObject> GetNames()
{
if (items.Count > 0)
{
return(items);
}
PdfDictionary dictionary = catalog.GetPdfObject().GetAsDictionary(PdfName.Names);
if (dictionary != null)
{
dictionary = dictionary.GetAsDictionary(treeType);
if (dictionary != null)
{
items = ReadTree(dictionary);
// A separate collection for keys is used for auto porting to C#, because in C#
// it is impossible to change the collection which you iterate in for loop
ICollection <String> keys = new HashSet <String>();
keys.AddAll(items.Keys);
foreach (String key in keys)
{
if (treeType.Equals(PdfName.Dests))
{
PdfArray arr = GetDestArray(items.Get(key));
if (arr != null)
{
items.Put(key, arr);
}
else
{
items.JRemove(key);
}
}
else
{
if (items.Get(key) == null)
{
items.JRemove(key);
}
}
}
}
}
if (treeType.Equals(PdfName.Dests))
{
PdfDictionary destinations = catalog.GetPdfObject().GetAsDictionary(PdfName.Dests);
if (destinations != null)
{
ICollection <PdfName> keys = destinations.KeySet();
foreach (PdfName key in keys)
{
PdfArray array = GetDestArray(destinations.Get(key));
if (array == null)
{
continue;
}
items.Put(key.GetValue(), array);
}
}
}
return(items);
}
/// <summary>Retrieves the names stored in the name tree</summary>
/// <returns>Map containing the PdfObjects stored in the tree</returns>
public virtual IDictionary <String, PdfObject> GetNames()
{
if (items.Count > 0)
{
return(items);
}
PdfDictionary dictionary = catalog.GetPdfObject().GetAsDictionary(PdfName.Names);
if (dictionary != null)
{
dictionary = dictionary.GetAsDictionary(treeType);
if (dictionary != null)
{
items = ReadTree(dictionary);
//@TODO It's done for auto porting to itextsharp, cuz u cannot change collection which you iterate
// in for loop (even if you change only value of a Map entry) in .NET. Java doesn't have such a problem.
// We should find a better solution in the future.
ICollection <String> keys = new HashSet <String>();
keys.AddAll(items.Keys);
foreach (String key in keys)
{
if (treeType.Equals(PdfName.Dests))
{
PdfArray arr = GetDestArray(items.Get(key));
if (arr != null)
{
items.Put(key, arr);
}
else
{
items.JRemove(key);
}
}
else
{
if (items.Get(key) == null)
{
items.JRemove(key);
}
}
}
}
}
if (treeType.Equals(PdfName.Dests))
{
PdfDictionary destinations = catalog.GetPdfObject().GetAsDictionary(PdfName.Dests);
if (destinations != null)
{
ICollection <PdfName> keys = destinations.KeySet();
foreach (PdfName key in keys)
{
PdfArray array = GetDestArray(destinations.Get(key));
if (array == null)
{
continue;
}
items.Put(key.GetValue(), array);
}
}
}
return(items);
}