/// <summary>Use this method to set the XMP Metadata for each page.</summary>
/// <param name="xmpMetadata">The xmpMetadata to set.</param>
/// <exception cref="System.IO.IOException"/>
public virtual void SetXmpMetadata(byte[] xmpMetadata)
{
PdfStream xmp = ((PdfStream) new PdfStream().MakeIndirect(GetDocument()));
xmp.GetOutputStream().Write(xmpMetadata);
xmp.Put(PdfName.Type, PdfName.Metadata);
xmp.Put(PdfName.Subtype, PdfName.XML);
GetPdfObject().Put(PdfName.Metadata, xmp);
}
public virtual void SoundActionTest()
{
String fileName = "soundActionTest.pdf";
PdfDocument document = CreateDocument(new PdfWriter(destinationFolder + fileName), false);
Stream @is = new FileStream(sourceFolder + "sample.aif", FileMode.Open, FileAccess.Read);
PdfStream sound1 = new PdfStream(document, @is);
sound1.Put(PdfName.R, new PdfNumber(32117));
sound1.Put(PdfName.E, PdfName.Signed);
sound1.Put(PdfName.B, new PdfNumber(16));
sound1.Put(PdfName.C, new PdfNumber(1));
document.GetPage(2).SetAdditionalAction(PdfName.O, PdfAction.CreateSound(sound1));
document.Close();
NUnit.Framework.Assert.IsNull(new CompareTool().CompareByContent(destinationFolder + fileName, sourceFolder
+ "cmp_" + fileName, destinationFolder, "diff_"));
}
public virtual void CustomMemoryHandlerSingleTest()
{
MemoryLimitsAwareHandler handler = new MemoryLimitsAwareHandler();
handler.SetMaxSizeOfSingleDecompressedPdfStream(1000);
PdfDocument pdfDocument = new PdfDocument(new PdfReader(sourceFolder + "timing.pdf", new ReaderProperties(
).SetMemoryLimitsAwareHandler(handler)), new PdfWriter(new MemoryStream()));
PdfStream stream = pdfDocument.GetFirstPage().GetContentStream(0);
byte[] b = stream.GetBytes(false);
PdfArray array = new PdfArray();
stream.Put(PdfName.Filter, array);
NUnit.Framework.Assert.AreEqual(51, PdfReader.DecodeBytes(b, stream).Length);
array.Add(PdfName.Fl);
NUnit.Framework.Assert.AreEqual(40, PdfReader.DecodeBytes(b, stream).Length);
array.Add(PdfName.Fl);
NUnit.Framework.Assert.AreEqual(992, PdfReader.DecodeBytes(b, stream).Length);
array.Add(PdfName.Fl);
String expectedExceptionMessage = PdfException.DuringDecompressionSingleStreamOccupiedMoreMemoryThanAllowed;
String thrownExceptionMessage = null;
try {
PdfReader.DecodeBytes(b, stream);
}
catch (MemoryLimitsAwareException e) {
thrownExceptionMessage = e.Message;
}
NUnit.Framework.Assert.AreEqual(expectedExceptionMessage, thrownExceptionMessage);
}
protected internal virtual void UpdateCompressionFilter(PdfStream pdfStream)
{
PdfObject filter = pdfStream.Get(PdfName.Filter);
if (filter == null)
{
pdfStream.Put(PdfName.Filter, PdfName.FlateDecode);
}
else
{
PdfArray filters = new PdfArray();
filters.Add(PdfName.FlateDecode);
if (filter is PdfArray)
{
filters.AddAll((PdfArray)filter);
}
else
{
filters.Add(filter);
}
PdfObject decodeParms = pdfStream.Get(PdfName.DecodeParms);
if (decodeParms != null)
{
if (decodeParms is PdfDictionary)
{
PdfArray array = new PdfArray();
array.Add(new PdfNull());
array.Add(decodeParms);
pdfStream.Put(PdfName.DecodeParms, array);
}
else
{
if (decodeParms is PdfArray)
{
((PdfArray)decodeParms).Add(0, new PdfNull());
}
else
{
throw new PdfException(PdfException.DecodeParameterType1IsNotSupported).SetMessageParams(decodeParms.GetType
().ToString());
}
}
}
pdfStream.Put(PdfName.Filter, filters);
}
}
public virtual void TestJPXDecodeFilter()
{
PdfStream pdfStream = new PdfStream(FLATE_DECODED_BYTES);
pdfStream.Put(PdfName.Filter, new PdfArray(JavaUtil.ArraysAsList((PdfObject)PdfName.FlateDecode, (PdfObject
)PdfName.JPXDecode)));
NUnit.Framework.Assert.AreEqual(BYTES, pdfStream.GetBytes());
}
public virtual void SoundActionWithToLowVolumeTest()
{
PdfDocument document = CreateDocument(new PdfWriter(new MemoryStream()), false);
Stream @is = new FileStream(sourceFolder + "sample.aif", FileMode.Open, FileAccess.Read);
PdfStream sound1 = new PdfStream(document, @is);
sound1.Put(PdfName.R, new PdfNumber(32117));
sound1.Put(PdfName.E, PdfName.Signed);
sound1.Put(PdfName.B, new PdfNumber(16));
sound1.Put(PdfName.C, new PdfNumber(1));
try {
document.GetPage(2).SetAdditionalAction(PdfName.O, PdfAction.CreateSound(sound1, -1.1f, false, false, false
));
NUnit.Framework.Assert.Fail("Exception not thrown");
}
catch (Exception e) {
NUnit.Framework.Assert.AreEqual("volume", e.Message);
}
document.Close();
}
public virtual void TestJBIG2DecodeFilter()
{
PdfStream pdfStream = new PdfStream(FLATE_DECODED_BYTES);
pdfStream.Put(PdfName.Filter, new PdfArray(JavaUtil.ArraysAsList((PdfObject)PdfName.FlateDecode, (PdfObject
)PdfName.JBIG2Decode)));
NUnit.Framework.Assert.That(() => {
pdfStream.GetBytes(true);
}
, NUnit.Framework.Throws.InstanceOf <PdfException>().With.Message.EqualTo(MessageFormatUtil.Format(PdfException.Filter1IsNotSupported, PdfName.JBIG2Decode)))
;
}
public virtual void DifferentFiltersEmptyTest()
{
byte[] b = new byte[1000];
PdfArray array = new PdfArray();
array.Add(PdfName.Fl);
array.Add(PdfName.AHx);
array.Add(PdfName.A85);
array.Add(PdfName.RunLengthDecode);
PdfStream stream = new PdfStream(b);
stream.Put(PdfName.Filter, array);
NUnit.Framework.Assert.AreEqual(0, PdfReader.DecodeBytes(b, stream).Length);
}
public virtual void DefaultMemoryHandlerTest()
{
using (PdfDocument pdfDocument = new PdfDocument(new PdfReader(sourceFolder + "timing.pdf"), new PdfWriter
(new MemoryStream()))) {
PdfStream stream = pdfDocument.GetFirstPage().GetContentStream(0);
byte[] b = stream.GetBytes(false);
PdfArray array = new PdfArray();
stream.Put(PdfName.Filter, array);
NUnit.Framework.Assert.AreEqual(51, PdfReader.DecodeBytes(b, stream).Length);
array.Add(PdfName.Fl);
NUnit.Framework.Assert.AreEqual(40, PdfReader.DecodeBytes(b, stream).Length);
array.Add(PdfName.Fl);
NUnit.Framework.Assert.AreEqual(992, PdfReader.DecodeBytes(b, stream).Length);
array.Add(PdfName.Fl);
NUnit.Framework.Assert.AreEqual(1000000, PdfReader.DecodeBytes(b, stream).Length);
}
}
public virtual void OverriddenMemoryHandlerNoStreamsAreSuspiciousTest()
{
MemoryLimitsAwareHandler handler = new _MemoryLimitsAwareHandler_235();
handler.SetMaxSizeOfSingleDecompressedPdfStream(20);
using (PdfDocument pdfDocument = new PdfDocument(new PdfReader(sourceFolder + "timing.pdf", new ReaderProperties
().SetMemoryLimitsAwareHandler(handler)), new PdfWriter(new MemoryStream()))) {
PdfStream stream = pdfDocument.GetFirstPage().GetContentStream(0);
byte[] b = stream.GetBytes(false);
PdfArray array = new PdfArray();
stream.Put(PdfName.Filter, array);
array.Add(PdfName.Fl);
array.Add(PdfName.Fl);
// Limit is reached but the stream with several copies of the filter is not considered
// to be suspicious
PdfReader.DecodeBytes(b, stream);
}
}
public virtual void OneFilterCustomMemoryHandlerSingleTest()
{
MemoryLimitsAwareHandler handler = new MemoryLimitsAwareHandler();
handler.SetMaxSizeOfSingleDecompressedPdfStream(20);
using (PdfDocument pdfDocument = new PdfDocument(new PdfReader(sourceFolder + "timing.pdf", new ReaderProperties
().SetMemoryLimitsAwareHandler(handler)), new PdfWriter(new MemoryStream()))) {
PdfStream stream = pdfDocument.GetFirstPage().GetContentStream(0);
byte[] b = stream.GetBytes(false);
PdfArray array = new PdfArray();
stream.Put(PdfName.Filter, array);
// Limit is reached, but the stream has no filters. Therefore we don't consider ot to be suspicious
NUnit.Framework.Assert.AreEqual(51, PdfReader.DecodeBytes(b, stream).Length);
// Limit is reached, but the stream has only one filter. Therefore we don't consider ot to be suspicious
array.Add(PdfName.Fl);
NUnit.Framework.Assert.AreEqual(40, PdfReader.DecodeBytes(b, stream).Length);
}
}
public virtual void OverriddenMemoryHandlerAllStreamsAreSuspiciousTest()
{
NUnit.Framework.Assert.That(() => {
MemoryLimitsAwareHandler handler = new _MemoryLimitsAwareHandler_203();
handler.SetMaxSizeOfSingleDecompressedPdfStream(20);
using (PdfDocument pdfDocument = new PdfDocument(new PdfReader(sourceFolder + "timing.pdf", new ReaderProperties
().SetMemoryLimitsAwareHandler(handler)), new PdfWriter(new MemoryStream()))) {
PdfStream stream = pdfDocument.GetFirstPage().GetContentStream(0);
byte[] b = stream.GetBytes(false);
PdfArray array = new PdfArray();
stream.Put(PdfName.Filter, array);
array.Add(PdfName.Fl);
// Limit is reached, and the stream with one filter is considered to be suspicious
PdfReader.DecodeBytes(b, stream);
}
}
, NUnit.Framework.Throws.InstanceOf <MemoryLimitsAwareException>().With.Message.EqualTo(PdfException.DuringDecompressionSingleStreamOccupiedMoreMemoryThanAllowed))
;
}
public virtual void NoMemoryHandlerTest()
{
PdfDocument pdfDocument = new PdfDocument(new PdfWriter(new MemoryStream()));
FileStream @is = new FileStream(sourceFolder + "stream", FileMode.Open, FileAccess.Read);
byte[] b = new byte[51];
@is.Read(b);
PdfArray array = new PdfArray();
PdfStream stream = new PdfStream(b);
stream.Put(PdfName.Filter, array);
stream.MakeIndirect(pdfDocument);
NUnit.Framework.Assert.AreEqual(51, PdfReader.DecodeBytes(b, stream).Length);
array.Add(PdfName.Fl);
NUnit.Framework.Assert.AreEqual(40, PdfReader.DecodeBytes(b, stream).Length);
array.Add(PdfName.Fl);
NUnit.Framework.Assert.AreEqual(992, PdfReader.DecodeBytes(b, stream).Length);
array.Add(PdfName.Fl);
NUnit.Framework.Assert.AreEqual(1000000, PdfReader.DecodeBytes(b, stream).Length);
}
public virtual void CustomMemoryHandlerSingleTest()
{
MemoryLimitsAwareHandler handler = new MemoryLimitsAwareHandler();
handler.SetMaxSizeOfSingleDecompressedPdfStream(1000);
NUnit.Framework.Assert.That(() => {
using (PdfDocument pdfDocument = new PdfDocument(new PdfReader(sourceFolder + "timing.pdf", new ReaderProperties
().SetMemoryLimitsAwareHandler(handler)), new PdfWriter(new MemoryStream()))) {
PdfStream stream = pdfDocument.GetFirstPage().GetContentStream(0);
byte[] b = stream.GetBytes(false);
PdfArray array = new PdfArray();
stream.Put(PdfName.Filter, array);
NUnit.Framework.Assert.AreEqual(51, PdfReader.DecodeBytes(b, stream).Length);
array.Add(PdfName.Fl);
NUnit.Framework.Assert.AreEqual(40, PdfReader.DecodeBytes(b, stream).Length);
array.Add(PdfName.Fl);
NUnit.Framework.Assert.AreEqual(992, PdfReader.DecodeBytes(b, stream).Length);
array.Add(PdfName.Fl);
PdfReader.DecodeBytes(b, stream);
}
}
, NUnit.Framework.Throws.InstanceOf <MemoryLimitsAwareException>().With.Message.EqualTo(PdfException.DuringDecompressionSingleStreamOccupiedMoreMemoryThanAllowed))
;
}
/// <summary>Writes cross reference table and trailer to PDF.</summary>
/// <exception cref="System.IO.IOException"/>
/// <exception cref="iText.Kernel.PdfException"/>
protected internal virtual void WriteXrefTableAndTrailer(PdfDocument document, PdfObject fileId, PdfObject
crypto)
{
PdfWriter writer = document.GetWriter();
if (document.IsAppendMode())
{
// Increment generation number for all freed references.
foreach (int?objNr in freeReferences)
{
xref[(int)objNr].genNr++;
}
}
else
{
foreach (int?objNr in freeReferences)
{
xref[(int)objNr] = null;
}
}
freeReferences.Clear();
for (int i = count; i > 0; --i)
{
PdfIndirectReference lastRef = xref[i];
if (lastRef == null || (lastRef.IsFree() && lastRef.GetGenNumber() == 0) || (!lastRef.CheckState(PdfObject
.FLUSHED) && !(document.properties.appendMode && !lastRef.CheckState(PdfObject.MODIFIED))))
{
--count;
}
else
{
break;
}
}
IList <int> sections = new List <int>();
int first = 0;
int len = 1;
if (document.IsAppendMode())
{
first = 1;
len = 0;
}
for (int i_1 = 1; i_1 < Size(); i_1++)
{
PdfIndirectReference reference = xref[i_1];
if (reference != null)
{
if ((document.properties.appendMode && !reference.CheckState(PdfObject.MODIFIED)) || (reference.IsFree() &&
reference.GetGenNumber() == 0) || (!reference.CheckState(PdfObject.FLUSHED)))
{
reference = null;
}
}
if (reference == null)
{
if (len > 0)
{
sections.Add(first);
sections.Add(len);
}
len = 0;
}
else
{
if (len > 0)
{
len++;
}
else
{
first = i_1;
len = 1;
}
}
}
if (len > 0)
{
sections.Add(first);
sections.Add(len);
}
if (document.properties.appendMode && sections.Count == 0)
{
// no modifications.
xref = null;
return;
}
long startxref = writer.GetCurrentPos();
if (writer.IsFullCompression())
{
PdfStream xrefStream = ((PdfStream) new PdfStream().MakeIndirect(document));
xrefStream.MakeIndirect(document);
xrefStream.Put(PdfName.Type, PdfName.XRef);
xrefStream.Put(PdfName.ID, fileId);
if (crypto != null)
{
xrefStream.Put(PdfName.Encrypt, crypto);
}
xrefStream.Put(PdfName.Size, new PdfNumber(this.Size()));
List <PdfObject> tmpArray = new List <PdfObject>(3);
tmpArray.Add(new PdfNumber(1));
tmpArray.Add(new PdfNumber(4));
tmpArray.Add(new PdfNumber(2));
xrefStream.Put(PdfName.W, new PdfArray(tmpArray));
xrefStream.Put(PdfName.Info, document.GetDocumentInfo().GetPdfObject());
xrefStream.Put(PdfName.Root, document.GetCatalog().GetPdfObject());
PdfArray index = new PdfArray();
foreach (int?section in sections)
{
index.Add(new PdfNumber((int)section));
}
if (document.properties.appendMode)
{
PdfNumber lastXref = new PdfNumber(document.reader.GetLastXref());
xrefStream.Put(PdfName.Prev, lastXref);
}
xrefStream.Put(PdfName.Index, index);
iText.Kernel.Pdf.PdfXrefTable xrefTable = document.GetXref();
for (int k = 0; k < sections.Count; k += 2)
{
first = (int)sections[k];
len = (int)sections[k + 1];
for (int i_2 = first; i_2 < first + len; i_2++)
{
PdfIndirectReference reference = xrefTable.Get(i_2);
if (reference == null)
{
continue;
}
if (reference.IsFree())
{
xrefStream.GetOutputStream().Write(0);
//NOTE The object number of the next free object should be at this position due to spec.
xrefStream.GetOutputStream().Write(IntToBytes(0));
xrefStream.GetOutputStream().Write(ShortToBytes(reference.GetGenNumber()));
}
else
{
if (reference.GetObjStreamNumber() == 0)
{
xrefStream.GetOutputStream().Write(1);
System.Diagnostics.Debug.Assert(reference.GetOffset() < int.MaxValue);
xrefStream.GetOutputStream().Write(IntToBytes((int)reference.GetOffset()));
xrefStream.GetOutputStream().Write(ShortToBytes(reference.GetGenNumber()));
}
else
{
xrefStream.GetOutputStream().Write(2);
xrefStream.GetOutputStream().Write(IntToBytes(reference.GetObjStreamNumber()));
xrefStream.GetOutputStream().Write(ShortToBytes(reference.GetIndex()));
}
}
}
}
xrefStream.Flush();
}
else
{
writer.WriteString("xref\n");
iText.Kernel.Pdf.PdfXrefTable xrefTable = document.GetXref();
for (int k = 0; k < sections.Count; k += 2)
{
first = (int)sections[k];
len = (int)sections[k + 1];
writer.WriteInteger(first).WriteSpace().WriteInteger(len).WriteByte((byte)'\n');
for (int i_2 = first; i_2 < first + len; i_2++)
{
PdfIndirectReference reference = xrefTable.Get(i_2);
writer.WriteString(DecimalFormatUtil.FormatNumber(reference.GetOffset(), objectOffsetFormatter)).WriteSpace
().WriteString(DecimalFormatUtil.FormatNumber(reference.GetGenNumber(), objectGenerationFormatter)).WriteSpace
();
if (reference.IsFree())
{
writer.WriteBytes(freeXRefEntry);
}
else
{
writer.WriteBytes(inUseXRefEntry);
}
}
}
PdfDictionary trailer = document.GetTrailer();
// Remove all unused keys in case stamp mode in case original file has full compression, but destination file has not.
trailer.Remove(PdfName.W);
trailer.Remove(PdfName.Index);
trailer.Remove(PdfName.Type);
trailer.Remove(PdfName.Length);
trailer.Put(PdfName.Size, new PdfNumber(this.Size()));
trailer.Put(PdfName.ID, fileId);
if (crypto != null)
{
trailer.Put(PdfName.Encrypt, crypto);
}
writer.WriteString("trailer\n");
if (document.properties.appendMode)
{
PdfNumber lastXref = new PdfNumber(document.reader.GetLastXref());
trailer.Put(PdfName.Prev, lastXref);
}
writer.Write(document.GetTrailer());
writer.Write('\n');
}
WriteKeyInfo(writer);
writer.WriteString("startxref\n").WriteLong(startxref).WriteString("\n%%EOF\n");
xref = null;
}
protected internal virtual byte[] DecodeFlateBytes(PdfStream stream, byte[] bytes)
{
PdfObject filterObject = stream.Get(PdfName.Filter);
if (filterObject == null)
{
return(bytes);
}
// check if flateDecode filter is on top
PdfName filterName;
PdfArray filtersArray = null;
if (filterObject is PdfName)
{
filterName = (PdfName)filterObject;
}
else
{
if (filterObject is PdfArray)
{
filtersArray = (PdfArray)filterObject;
filterName = filtersArray.GetAsName(0);
}
else
{
throw new PdfException(PdfException.FilterIsNotANameOrArray);
}
}
if (!PdfName.FlateDecode.Equals(filterName))
{
return(bytes);
}
// get decode params if present
PdfDictionary decodeParams;
PdfArray decodeParamsArray = null;
PdfObject decodeParamsObject = stream.Get(PdfName.DecodeParms);
if (decodeParamsObject == null)
{
decodeParams = null;
}
else
{
if (decodeParamsObject.GetObjectType() == PdfObject.DICTIONARY)
{
decodeParams = (PdfDictionary)decodeParamsObject;
}
else
{
if (decodeParamsObject.GetObjectType() == PdfObject.ARRAY)
{
decodeParamsArray = (PdfArray)decodeParamsObject;
decodeParams = decodeParamsArray.GetAsDictionary(0);
}
else
{
throw new PdfException(PdfException.DecodeParameterType1IsNotSupported).SetMessageParams(decodeParamsObject
.GetType().ToString());
}
}
}
// decode
byte[] res = FlateDecodeFilter.FlateDecode(bytes, true);
if (res == null)
{
res = FlateDecodeFilter.FlateDecode(bytes, false);
}
bytes = FlateDecodeFilter.DecodePredictor(res, decodeParams);
//remove filter and decode params
filterObject = null;
if (filtersArray != null)
{
filtersArray.Remove(0);
if (filtersArray.Size() == 1)
{
filterObject = filtersArray.Get(0);
}
else
{
if (!filtersArray.IsEmpty())
{
filterObject = filtersArray;
}
}
}
decodeParamsObject = null;
if (decodeParamsArray != null)
{
decodeParamsArray.Remove(0);
if (decodeParamsArray.Size() == 1 && decodeParamsArray.Get(0).GetObjectType() != PdfObject.NULL)
{
decodeParamsObject = decodeParamsArray.Get(0);
}
else
{
if (!decodeParamsArray.IsEmpty())
{
decodeParamsObject = decodeParamsArray;
}
}
}
if (filterObject == null)
{
stream.Remove(PdfName.Filter);
}
else
{
stream.Put(PdfName.Filter, filterObject);
}
if (decodeParamsObject == null)
{
stream.Remove(PdfName.DecodeParms);
}
else
{
stream.Put(PdfName.DecodeParms, decodeParamsObject);
}
return(bytes);
}
/// <summary>Writes cross reference table and trailer to PDF.</summary>
/// <exception cref="System.IO.IOException"/>
protected internal virtual void WriteXrefTableAndTrailer(PdfDocument document, PdfObject fileId, PdfObject
crypto)
{
PdfWriter writer = document.GetWriter();
if (!document.properties.appendMode)
{
for (int i = count; i > 0; --i)
{
PdfIndirectReference lastRef = xref[i];
if (lastRef == null || lastRef.IsFree())
{
RemoveFreeRefFromList(i);
--count;
}
else
{
break;
}
}
}
IList <int> sections = new List <int>();
int first = 0;
int len = 0;
for (int i = 0; i < Size(); i++)
{
PdfIndirectReference reference = xref[i];
if (document.properties.appendMode && reference != null && !reference.CheckState(PdfObject.MODIFIED))
{
reference = null;
}
if (reference == null)
{
if (len > 0)
{
sections.Add(first);
sections.Add(len);
}
len = 0;
}
else
{
if (len > 0)
{
len++;
}
else
{
first = i;
len = 1;
}
}
}
if (len > 0)
{
sections.Add(first);
sections.Add(len);
}
if (document.properties.appendMode && sections.Count == 0)
{
// no modifications.
xref = null;
return;
}
long startxref = writer.GetCurrentPos();
if (writer.IsFullCompression())
{
PdfStream xrefStream = (PdfStream) new PdfStream().MakeIndirect(document);
xrefStream.MakeIndirect(document);
xrefStream.Put(PdfName.Type, PdfName.XRef);
xrefStream.Put(PdfName.ID, fileId);
if (crypto != null)
{
xrefStream.Put(PdfName.Encrypt, crypto);
}
xrefStream.Put(PdfName.Size, new PdfNumber(this.Size()));
List <PdfObject> tmpArray = new List <PdfObject>(3);
tmpArray.Add(new PdfNumber(1));
tmpArray.Add(new PdfNumber(4));
tmpArray.Add(new PdfNumber(2));
xrefStream.Put(PdfName.W, new PdfArray(tmpArray));
xrefStream.Put(PdfName.Info, document.GetDocumentInfo().GetPdfObject());
xrefStream.Put(PdfName.Root, document.GetCatalog().GetPdfObject());
PdfArray index = new PdfArray();
foreach (int?section in sections)
{
index.Add(new PdfNumber((int)section));
}
if (document.properties.appendMode)
{
PdfNumber lastXref = new PdfNumber(document.reader.GetLastXref());
xrefStream.Put(PdfName.Prev, lastXref);
}
xrefStream.Put(PdfName.Index, index);
iText.Kernel.Pdf.PdfXrefTable xrefTable = document.GetXref();
for (int k = 0; k < sections.Count; k += 2)
{
first = (int)sections[k];
len = (int)sections[k + 1];
for (int i = first; i < first + len; i++)
{
PdfIndirectReference reference = xrefTable.Get(i);
if (reference.IsFree())
{
xrefStream.GetOutputStream().Write(0);
System.Diagnostics.Debug.Assert(reference.GetOffset() < int.MaxValue);
xrefStream.GetOutputStream().Write(IntToBytes((int)reference.GetOffset()));
xrefStream.GetOutputStream().Write(ShortToBytes(reference.GetGenNumber()));
}
else
{
if (reference.GetObjStreamNumber() == 0)
{
xrefStream.GetOutputStream().Write(1);
System.Diagnostics.Debug.Assert(reference.GetOffset() < int.MaxValue);
xrefStream.GetOutputStream().Write(IntToBytes((int)reference.GetOffset()));
xrefStream.GetOutputStream().Write(ShortToBytes(reference.GetGenNumber()));
}
else
{
xrefStream.GetOutputStream().Write(2);
xrefStream.GetOutputStream().Write(IntToBytes(reference.GetObjStreamNumber()));
xrefStream.GetOutputStream().Write(ShortToBytes(reference.GetIndex()));
}
}
}
}
xrefStream.Flush();
}
else
{
writer.WriteString("xref\n");
iText.Kernel.Pdf.PdfXrefTable xrefTable = document.GetXref();
for (int k = 0; k < sections.Count; k += 2)
{
first = (int)sections[k];
len = (int)sections[k + 1];
writer.WriteInteger(first).WriteSpace().WriteInteger(len).WriteByte((byte)'\n');
for (int i = first; i < first + len; i++)
{
PdfIndirectReference reference = xrefTable.Get(i);
StringBuilder off = new StringBuilder("0000000000").Append(reference.GetOffset());
StringBuilder gen = new StringBuilder("00000").Append(reference.GetGenNumber());
writer.WriteString(off.JSubstring(off.Length - 10, off.Length)).WriteSpace().WriteString(gen.JSubstring(gen
.Length - 5, gen.Length)).WriteSpace();
if (reference.IsFree())
{
writer.WriteBytes(freeXRefEntry);
}
else
{
writer.WriteBytes(inUseXRefEntry);
}
}
}
PdfDictionary trailer = document.GetTrailer();
// Remove all unused keys in case stamp mode in case original file has full compression, but destination file has not.
trailer.Remove(PdfName.W);
trailer.Remove(PdfName.Index);
trailer.Remove(PdfName.Type);
trailer.Remove(PdfName.Length);
trailer.Put(PdfName.Size, new PdfNumber(this.Size()));
trailer.Put(PdfName.ID, fileId);
if (crypto != null)
{
trailer.Put(PdfName.Encrypt, crypto);
}
writer.WriteString("trailer\n");
if (document.properties.appendMode)
{
PdfNumber lastXref = new PdfNumber(document.reader.GetLastXref());
trailer.Put(PdfName.Prev, lastXref);
}
writer.Write(document.GetTrailer());
writer.Write('\n');
}
WriteKeyInfo(document);
writer.WriteString("startxref\n").WriteLong(startxref).WriteString("\n%%EOF\n");
xref = null;
freeReferencesLinkedList.Clear();
}
private void Write(PdfStream pdfStream)
{
try {
bool userDefinedCompression = pdfStream.GetCompressionLevel() != CompressionConstants.UNDEFINED_COMPRESSION;
if (!userDefinedCompression)
{
int defaultCompressionLevel = document != null?document.GetWriter().GetCompressionLevel() : CompressionConstants
.DEFAULT_COMPRESSION;
pdfStream.SetCompressionLevel(defaultCompressionLevel);
}
bool toCompress = pdfStream.GetCompressionLevel() != CompressionConstants.NO_COMPRESSION;
bool allowCompression = !pdfStream.ContainsKey(PdfName.Filter) && IsNotMetadataPdfStream(pdfStream);
if (pdfStream.GetInputStream() != null)
{
Stream fout = this;
DeflaterOutputStream def = null;
OutputStreamEncryption ose = null;
if (crypto != null && !crypto.IsEmbeddedFilesOnly())
{
fout = ose = crypto.GetEncryptionStream(fout);
}
if (toCompress && (allowCompression || userDefinedCompression))
{
UpdateCompressionFilter(pdfStream);
fout = def = new DeflaterOutputStream(fout, pdfStream.GetCompressionLevel(), 0x8000);
}
this.Write((PdfDictionary)pdfStream);
WriteBytes(iText.Kernel.Pdf.PdfOutputStream.stream);
long beginStreamContent = GetCurrentPos();
byte[] buf = new byte[4192];
while (true)
{
int n = pdfStream.GetInputStream().Read(buf);
if (n <= 0)
{
break;
}
fout.Write(buf, 0, n);
}
if (def != null)
{
def.Finish();
}
if (ose != null)
{
ose.Finish();
}
PdfNumber length = pdfStream.GetAsNumber(PdfName.Length);
length.SetValue((int)(GetCurrentPos() - beginStreamContent));
pdfStream.UpdateLength(length.IntValue());
WriteBytes(iText.Kernel.Pdf.PdfOutputStream.endstream);
}
else
{
//When document is opened in stamping mode the output stream can be uninitialized.
//We have to initialize it and write all data from streams input to streams output.
if (pdfStream.GetOutputStream() == null && pdfStream.GetIndirectReference().GetReader() != null)
{
// If new specific compression is set for stream,
// then compressed stream should be decoded and written with new compression settings
byte[] bytes = pdfStream.GetIndirectReference().GetReader().ReadStreamBytes(pdfStream, false);
if (userDefinedCompression)
{
bytes = DecodeFlateBytes(pdfStream, bytes);
}
pdfStream.InitOutputStream(new ByteArrayOutputStream(bytes.Length));
pdfStream.GetOutputStream().Write(bytes);
}
System.Diagnostics.Debug.Assert(pdfStream.GetOutputStream() != null, "PdfStream lost OutputStream");
ByteArrayOutputStream byteArrayStream;
try {
if (toCompress && !ContainsFlateFilter(pdfStream) && (allowCompression || userDefinedCompression))
{
// compress
UpdateCompressionFilter(pdfStream);
byteArrayStream = new ByteArrayOutputStream();
DeflaterOutputStream zip = new DeflaterOutputStream(byteArrayStream, pdfStream.GetCompressionLevel());
if (pdfStream is PdfObjectStream)
{
PdfObjectStream objectStream = (PdfObjectStream)pdfStream;
((ByteArrayOutputStream)objectStream.GetIndexStream().GetOutputStream()).WriteTo(zip);
((ByteArrayOutputStream)objectStream.GetOutputStream().GetOutputStream()).WriteTo(zip);
}
else
{
System.Diagnostics.Debug.Assert(pdfStream.GetOutputStream() != null, "Error in outputStream");
((ByteArrayOutputStream)pdfStream.GetOutputStream().GetOutputStream()).WriteTo(zip);
}
zip.Finish();
}
else
{
if (pdfStream is PdfObjectStream)
{
PdfObjectStream objectStream = (PdfObjectStream)pdfStream;
byteArrayStream = new ByteArrayOutputStream();
((ByteArrayOutputStream)objectStream.GetIndexStream().GetOutputStream()).WriteTo(byteArrayStream);
((ByteArrayOutputStream)objectStream.GetOutputStream().GetOutputStream()).WriteTo(byteArrayStream);
}
else
{
System.Diagnostics.Debug.Assert(pdfStream.GetOutputStream() != null, "Error in outputStream");
byteArrayStream = (ByteArrayOutputStream)pdfStream.GetOutputStream().GetOutputStream();
}
}
if (CheckEncryption(pdfStream))
{
ByteArrayOutputStream encodedStream = new ByteArrayOutputStream();
OutputStreamEncryption ose = crypto.GetEncryptionStream(encodedStream);
byteArrayStream.WriteTo(ose);
ose.Finish();
byteArrayStream = encodedStream;
}
}
catch (System.IO.IOException ioe) {
throw new PdfException(PdfException.IoException, ioe);
}
pdfStream.Put(PdfName.Length, new PdfNumber(byteArrayStream.Length));
pdfStream.UpdateLength((int)byteArrayStream.Length);
this.Write((PdfDictionary)pdfStream);
WriteBytes(iText.Kernel.Pdf.PdfOutputStream.stream);
byteArrayStream.WriteTo(this);
byteArrayStream.Dispose();
WriteBytes(iText.Kernel.Pdf.PdfOutputStream.endstream);
}
}
catch (System.IO.IOException e) {
throw new PdfException(PdfException.CannotWriteToPdfStream, e, pdfStream);
}
}
/// <summary>Writes cross reference table and trailer to PDF.</summary>
protected internal virtual void WriteXrefTableAndTrailer(PdfDocument document, PdfObject fileId, PdfObject
crypto)
{
PdfWriter writer = document.GetWriter();
if (!document.properties.appendMode)
{
for (int i = count; i > 0; --i)
{
PdfIndirectReference lastRef = xref[i];
if (lastRef == null || lastRef.IsFree())
{
RemoveFreeRefFromList(i);
--count;
}
else
{
break;
}
}
}
IList <int> sections = CreateSections(document, false);
if (document.properties.appendMode && sections.Count == 0)
{
// no modifications.
xref = null;
return;
}
long startxref = writer.GetCurrentPos();
long xRefStmPos = -1;
if (writer.IsFullCompression())
{
PdfStream xrefStream = (PdfStream) new PdfStream().MakeIndirect(document);
xrefStream.MakeIndirect(document);
xrefStream.Put(PdfName.Type, PdfName.XRef);
xrefStream.Put(PdfName.ID, fileId);
if (crypto != null)
{
xrefStream.Put(PdfName.Encrypt, crypto);
}
xrefStream.Put(PdfName.Size, new PdfNumber(this.Size()));
int offsetSize = GetOffsetSize(Math.Max(startxref, Size()));
xrefStream.Put(PdfName.W, new PdfArray(JavaUtil.ArraysAsList((PdfObject) new PdfNumber(1), new PdfNumber(offsetSize
), new PdfNumber(2))));
xrefStream.Put(PdfName.Info, document.GetDocumentInfo().GetPdfObject());
xrefStream.Put(PdfName.Root, document.GetCatalog().GetPdfObject());
PdfArray index = new PdfArray();
foreach (int?section in sections)
{
index.Add(new PdfNumber((int)section));
}
if (document.properties.appendMode && !document.reader.hybridXref)
{
// "not meaningful in hybrid-reference files"
PdfNumber lastXref = new PdfNumber(document.reader.GetLastXref());
xrefStream.Put(PdfName.Prev, lastXref);
}
xrefStream.Put(PdfName.Index, index);
iText.Kernel.Pdf.PdfXrefTable xrefTable = document.GetXref();
for (int k = 0; k < sections.Count; k += 2)
{
int first = (int)sections[k];
int len = (int)sections[k + 1];
for (int i = first; i < first + len; i++)
{
PdfIndirectReference reference = xrefTable.Get(i);
if (reference.IsFree())
{
xrefStream.GetOutputStream().Write(0);
xrefStream.GetOutputStream().Write(reference.GetOffset(), offsetSize);
xrefStream.GetOutputStream().Write(reference.GetGenNumber(), 2);
}
else
{
if (reference.GetObjStreamNumber() == 0)
{
xrefStream.GetOutputStream().Write(1);
xrefStream.GetOutputStream().Write(reference.GetOffset(), offsetSize);
xrefStream.GetOutputStream().Write(reference.GetGenNumber(), 2);
}
else
{
xrefStream.GetOutputStream().Write(2);
xrefStream.GetOutputStream().Write(reference.GetObjStreamNumber(), offsetSize);
xrefStream.GetOutputStream().Write(reference.GetIndex(), 2);
}
}
}
}
xrefStream.Flush();
xRefStmPos = startxref;
}
// For documents with hybrid cross-reference table, i.e. containing xref streams as well as regular xref sections,
// we write additional regular xref section at the end of the document because the /Prev reference from
// xref stream to a regular xref section doesn't seem to be valid
bool needsRegularXref = !writer.IsFullCompression() || document.properties.appendMode && document.reader.hybridXref;
if (needsRegularXref)
{
startxref = writer.GetCurrentPos();
writer.WriteString("xref\n");
iText.Kernel.Pdf.PdfXrefTable xrefTable = document.GetXref();
if (xRefStmPos != -1)
{
// Get rid of all objects from object stream. This is done for hybrid documents
sections = CreateSections(document, true);
}
for (int k = 0; k < sections.Count; k += 2)
{
int first = (int)sections[k];
int len = (int)sections[k + 1];
writer.WriteInteger(first).WriteSpace().WriteInteger(len).WriteByte((byte)'\n');
for (int i = first; i < first + len; i++)
{
PdfIndirectReference reference = xrefTable.Get(i);
StringBuilder off = new StringBuilder("0000000000").Append(reference.GetOffset());
StringBuilder gen = new StringBuilder("00000").Append(reference.GetGenNumber());
writer.WriteString(off.JSubstring(off.Length - 10, off.Length)).WriteSpace().WriteString(gen.JSubstring(gen
.Length - 5, gen.Length)).WriteSpace();
if (reference.IsFree())
{
writer.WriteBytes(freeXRefEntry);
}
else
{
writer.WriteBytes(inUseXRefEntry);
}
}
}
PdfDictionary trailer = document.GetTrailer();
// Remove all unused keys in case stamp mode in case original file has full compression, but destination file has not.
trailer.Remove(PdfName.W);
trailer.Remove(PdfName.Index);
trailer.Remove(PdfName.Type);
trailer.Remove(PdfName.Length);
trailer.Put(PdfName.Size, new PdfNumber(this.Size()));
trailer.Put(PdfName.ID, fileId);
if (xRefStmPos != -1)
{
trailer.Put(PdfName.XRefStm, new PdfNumber(xRefStmPos));
}
if (crypto != null)
{
trailer.Put(PdfName.Encrypt, crypto);
}
writer.WriteString("trailer\n");
if (document.properties.appendMode)
{
PdfNumber lastXref = new PdfNumber(document.reader.GetLastXref());
trailer.Put(PdfName.Prev, lastXref);
}
writer.Write(document.GetTrailer());
writer.Write('\n');
}
WriteKeyInfo(document);
writer.WriteString("startxref\n").WriteLong(startxref).WriteString("\n%%EOF\n");
xref = null;
freeReferencesLinkedList.Clear();
}