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);
}
}
}
}
}
public virtual void SetLinkDestinationToPageAppendMode()
{
String input = sourceFolder + "100pages.pdf";
String output = destinationFolder + "setLinkDestinationToPageAppendMode.pdf";
PdfDocument pdfDoc = new PdfDocument(new PdfReader(input), new PdfWriter(output), new StampingProperties()
.UseAppendMode());
PdfPage page1 = pdfDoc.GetPage(1);
PdfPage page2 = pdfDoc.GetPage(2);
PdfIndirectReference page1IndRef = page1.GetPdfObject().GetIndirectReference();
PdfIndirectReference page2IndRef = page2.GetPdfObject().GetIndirectReference();
PdfDictionary aDict = ((PdfLinkAnnotation)page1.GetAnnotations()[0]).GetAction();
new PdfAction(aDict).Put(PdfName.D, PdfExplicitDestination.CreateXYZ(page2, 300, 400, 1).GetPdfObject());
PageFlushingHelper flushingHelper = new PageFlushingHelper(pdfDoc);
flushingHelper.AppendModeFlush(2);
flushingHelper.UnsafeFlushDeep(1);
// annotation is flushed
NUnit.Framework.Assert.IsTrue(aDict.IsFlushed());
// page is not flushed
NUnit.Framework.Assert.IsFalse(page1IndRef.CheckState(PdfObject.FLUSHED));
// page is released
NUnit.Framework.Assert.IsNull(page1IndRef.refersTo);
// page is not flushed
NUnit.Framework.Assert.IsFalse(page2IndRef.CheckState(PdfObject.FLUSHED));
// page is released
NUnit.Framework.Assert.IsNull(page2IndRef.refersTo);
// exception is not thrown
pdfDoc.Close();
}
private static void GetUsedNonFlushedOCGsFromResources(PdfDictionary toResources, PdfDictionary fromResources
, ICollection<PdfIndirectReference> fromUsedOcgs, PdfDictionary toOcProperties) {
if (toResources != null && !toResources.IsFlushed()) {
// Copy OCGs from properties
PdfDictionary toProperties = toResources.GetAsDictionary(PdfName.Properties);
PdfDictionary fromProperties = fromResources.GetAsDictionary(PdfName.Properties);
if (toProperties != null && !toProperties.IsFlushed()) {
foreach (PdfName name in toProperties.KeySet()) {
PdfObject toCurrObj = toProperties.Get(name);
PdfObject fromCurrObj = fromProperties.Get(name);
iText.Kernel.Pdf.OcgPropertiesCopier.GetUsedNonFlushedOCGsFromOcDict(toCurrObj, fromCurrObj, fromUsedOcgs,
toOcProperties);
}
}
// Copy OCGs from xObject
PdfDictionary toXObject = toResources.GetAsDictionary(PdfName.XObject);
PdfDictionary fromXObject = fromResources.GetAsDictionary(PdfName.XObject);
iText.Kernel.Pdf.OcgPropertiesCopier.GetUsedNonFlushedOCGsFromXObject(toXObject, fromXObject, fromUsedOcgs
, toOcProperties);
}
}
public virtual void ModifyAnnotationOnlyAppendMode()
{
String input = sourceFolder + "100pages.pdf";
String output = destinationFolder + "modifyAnnotOnly.pdf";
PdfDocument pdfDoc = new PdfDocument(new PdfReader(input), new PdfWriter(output), new StampingProperties()
.UseAppendMode());
PdfPage page = pdfDoc.GetPage(1);
PdfIndirectReference pageIndRef = page.GetPdfObject().GetIndirectReference();
PdfDictionary annotObj = page.GetAnnotations()[0].SetRectangle(new PdfArray(new Rectangle(0, 0, 300, 300))
).SetPage(page).GetPdfObject();
PageFlushingHelper flushingHelper = new PageFlushingHelper(pdfDoc);
flushingHelper.AppendModeFlush(1);
// annotation is flushed
NUnit.Framework.Assert.IsTrue(annotObj.IsFlushed());
// page is not flushed
NUnit.Framework.Assert.IsFalse(pageIndRef.CheckState(PdfObject.FLUSHED));
// page is released
NUnit.Framework.Assert.IsNull(pageIndRef.refersTo);
// exception is not thrown
pdfDoc.Close();
}
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;
}
public virtual void FlushSelfContainingObjectsWritingMode()
{
PdfDocument pdfDoc = new PdfDocument(new PdfWriter(new MemoryStream()));
PdfDictionary pageDict = pdfDoc.AddNewPage().GetPdfObject();
PdfDictionary dict1 = new PdfDictionary();
pageDict.Put(new PdfName("dict1"), dict1);
PdfArray arr1 = new PdfArray();
pageDict.Put(new PdfName("arr1"), arr1);
dict1.Put(new PdfName("dict1"), dict1);
dict1.Put(new PdfName("arr1"), arr1);
arr1.Add(arr1);
arr1.Add(dict1);
arr1.MakeIndirect(pdfDoc);
dict1.MakeIndirect(pdfDoc);
PageFlushingHelper flushingHelper = new PageFlushingHelper(pdfDoc);
flushingHelper.UnsafeFlushDeep(1);
NUnit.Framework.Assert.IsTrue(dict1.IsFlushed());
NUnit.Framework.Assert.IsTrue(arr1.IsFlushed());
pdfDoc.Close();
}
private bool FlushPage(int pageNum)
{
PdfPage page = pdfDoc.GetPage(pageNum);
if (page.IsFlushed())
{
return(false);
}
bool pageChanged = false;
if (!release)
{
pdfDoc.DispatchEvent(new PdfDocumentEvent(PdfDocumentEvent.END_PAGE, page));
InitCurrentLayers(pdfDoc);
}
PdfDictionary pageDict = page.GetPdfObject();
// Using PdfPage package internal methods in order to avoid PdfResources initialization: initializing PdfResources
// limits processing possibilities only to cases in which resources and specific resource type dictionaries are not flushed.
PdfDictionary resourcesDict = page.InitResources(false);
// inits /Resources dict entry if not inherited and not created yet
PdfResources resources = page.GetResources(false);
if (resources != null && resources.IsModified() && !resources.IsReadOnly())
{
resourcesDict = resources.GetPdfObject();
pageDict.Put(PdfName.Resources, resources.GetPdfObject());
pageDict.SetModified();
pageChanged = true;
}
if (!resourcesDict.IsFlushed())
{
FlushDictRecursively(resourcesDict, null);
FlushOrRelease(resourcesDict);
}
FlushDictRecursively(pageDict, pageContext);
if (release)
{
if (!page.GetPdfObject().IsModified())
{
pdfDoc.GetCatalog().GetPageTree().ReleasePage(pageNum);
page.UnsetForbidRelease();
page.GetPdfObject().Release();
}
}
else
{
if (pdfDoc.IsTagged() && !pdfDoc.GetStructTreeRoot().IsFlushed())
{
page.TryFlushPageTags();
}
if (!pdfDoc.IsAppendMode() || page.GetPdfObject().IsModified())
{
page.ReleaseInstanceFields();
page.GetPdfObject().Flush();
}
else
{
// it's append mode
pdfDoc.GetCatalog().GetPageTree().ReleasePage(pageNum);
page.UnsetForbidRelease();
page.GetPdfObject().Release();
}
}
layersRefs.Clear();
return(pageChanged);
}
