/// <summary>
/// Adds a cross reference entry to the table. Used when parsing the trailer.
/// </summary>
public void Add(PdfReference iref)
{
if (iref.ObjectID.IsEmpty)
iref.ObjectID = new PdfObjectID(GetNewObjectNumber());
if (this.objectTable.ContainsKey(iref.ObjectID))
throw new InvalidOperationException("Object already in table.");
this.objectTable.Add(iref.ObjectID, iref);
}
/// <summary>
/// Adds a cross reference entry to the table. Used when parsing the trailer.
/// </summary>
public void Add(PdfReference iref)
{
#if DEBUG
if (iref.ObjectID.ObjectNumber == 948)
GetType();
#endif
if (iref.ObjectID.IsEmpty)
iref.ObjectID = new PdfObjectID(GetNewObjectNumber());
if (ObjectTable.ContainsKey(iref.ObjectID))
throw new InvalidOperationException("Object already in table.");
ObjectTable.Add(iref.ObjectID, iref);
}
/// <summary>
/// Calculates the transitive closure of the specified PdfObject with the specified depth, i.e. all indirect objects
/// recursively reachable from the specified object in up to maximally depth steps.
/// </summary>
public PdfReference[] TransitiveClosure(PdfObject pdfObject, int depth)
{
CheckConsistence();
Dictionary<PdfItem, object> objects = new Dictionary<PdfItem, object>();
this.overflow = new Dictionary<PdfItem, object>();
TransitiveClosureImplementation(objects, pdfObject, ref depth);
TryAgain:
if (this.overflow.Count > 0)
{
PdfObject[] array = new PdfObject[this.overflow.Count];
this.overflow.Keys.CopyTo(array, 0);
this.overflow = new Dictionary<PdfItem, object>();
for (int idx = 0; idx < array.Length; idx++)
{
//PdfObject o = array[idx];
//o.GetType();
PdfObject obj = array[idx];
//if (!objects.Contains(obj))
// objects.Add(obj, null);
TransitiveClosureImplementation(objects, obj, ref depth);
}
goto TryAgain;
}
CheckConsistence();
ICollection collection = objects.Keys;
int count = collection.Count;
PdfReference[] irefs = new PdfReference[count];
collection.CopyTo(irefs, 0);
#if true_
for (int i = 0; i < count; i++)
for (int j = 0; j < count; j++)
if (i != j)
{
Debug.Assert(Object.ReferenceEquals(irefs[i].Document, this.document));
Debug.Assert(irefs[i] != irefs[j]);
Debug.Assert(!Object.ReferenceEquals(irefs[i], irefs[j]));
Debug.Assert(!Object.ReferenceEquals(irefs[i].Value, irefs[j].Value));
Debug.Assert(!Object.ReferenceEquals(irefs[i].ObjectID, irefs[j].Value.ObjectID));
Debug.Assert(irefs[i].ObjectNumber != irefs[j].Value.ObjectNumber);
Debug.Assert(Object.ReferenceEquals(irefs[i].Document, irefs[j].Document));
GetType();
}
#endif
return irefs;
}
/// <summary>
/// Recursively converts the page tree into a flat array.
/// </summary>
PdfDictionary[] GetKids(PdfReference iref, PdfPage.InheritedValues values, PdfDictionary parent)
{
// TODO: inherit inheritable keys...
PdfDictionary kid = (PdfDictionary)iref.Value;
if (kid.Elements.GetName(Keys.Type) == "/Page")
{
PdfPage.InheritValues(kid, values);
return new PdfDictionary[] { kid };
}
else
{
Debug.Assert(kid.Elements.GetName(Keys.Type) == "/Pages");
PdfPage.InheritValues(kid, ref values);
ArrayList list = new ArrayList();
PdfArray kids = kid.Elements["/Kids"] as PdfArray;
foreach (PdfReference xref2 in kids)
list.AddRange(GetKids(xref2, values, kid));
int count = list.Count;
Debug.Assert(count == kid.Elements.GetInteger("/Count"));
return (PdfDictionary[])list.ToArray(typeof(PdfDictionary));
}
}
/// <summary>
/// Retrieves the raw data for the colorspace.
/// </summary>
/// <returns>The raw data from the PdfArray of PdfReference.</returns>
protected virtual IEnumerable<byte> GetRawPalette(PdfReference reference)
{
if (reference == null) throw new ArgumentNullException("reference", "The reference index was null.");
var value = (reference.Value as PdfDictionary);
if (value == null) return(new byte[0]);
return (value.Stream.UnfilteredValue);
}
public void CheckConsistence()
{
Dictionary<PdfReference, object> ht1 = new Dictionary<PdfReference, object>();
foreach (PdfReference iref in this.objectTable.Values)
{
Debug.Assert(!ht1.ContainsKey(iref), "Duplicate iref.");
Debug.Assert(iref.Value != null);
ht1.Add(iref, null);
}
Dictionary<PdfObjectID, object> ht2 = new Dictionary<PdfObjectID, object>();
foreach (PdfReference iref in this.objectTable.Values)
{
Debug.Assert(!ht2.ContainsKey(iref.ObjectID), "Duplicate iref.");
ht2.Add(iref.ObjectID, null);
}
ICollection collection = this.objectTable.Values;
int count = collection.Count;
PdfReference[] irefs = new PdfReference[count];
collection.CopyTo(irefs, 0);
#if true_
for (int i = 0; i < count; i++)
for (int j = 0; j < count; j++)
if (i != j)
{
Debug.Assert(Object.ReferenceEquals(irefs[i].Document, this.document));
Debug.Assert(irefs[i] != irefs[j]);
Debug.Assert(!Object.ReferenceEquals(irefs[i], irefs[j]));
Debug.Assert(!Object.ReferenceEquals(irefs[i].Value, irefs[j].Value));
Debug.Assert(!Object.ReferenceEquals(irefs[i].ObjectID, irefs[j].Value.ObjectID));
Debug.Assert(irefs[i].ObjectNumber != irefs[j].Value.ObjectNumber);
Debug.Assert(Object.ReferenceEquals(irefs[i].Document, irefs[j].Document));
GetType();
}
#endif
}
/// <summary>
/// Parses whatever comes until the specified stop symbol is reached.
/// </summary>
void ParseObject(Symbol stop)
{
#if DEBUG_
ParseObjectCounter++;
Debug.WriteLine(ParseObjectCounter.ToString());
if (ParseObjectCounter == 178)
GetType();
#endif
Symbol symbol;
while ((symbol = ScanNextToken()) != Symbol.Eof)
{
if (symbol == stop)
return;
switch (symbol)
{
case Symbol.Comment:
// ignore comments
break;
case Symbol.Null:
this.stack.Shift(PdfNull.Value);
break;
case Symbol.Boolean:
this.stack.Shift(new PdfBoolean(this.lexer.TokenToBoolean));
break;
case Symbol.Integer:
this.stack.Shift(new PdfInteger(this.lexer.TokenToInteger));
break;
case Symbol.UInteger:
this.stack.Shift(new PdfUInteger(this.lexer.TokenToUInteger));
break;
case Symbol.Real:
this.stack.Shift(new PdfReal(this.lexer.TokenToReal));
break;
case Symbol.String:
//this.stack.Shift(new PdfString(this.lexer.Token, PdfStringFlags.PDFDocEncoding));
this.stack.Shift(new PdfString(this.lexer.Token, PdfStringFlags.RawEncoding));
break;
case Symbol.UnicodeString:
this.stack.Shift(new PdfString(this.lexer.Token, PdfStringFlags.Unicode));
break;
case Symbol.HexString:
this.stack.Shift(new PdfString(this.lexer.Token, PdfStringFlags.HexLiteral));
break;
case Symbol.UnicodeHexString:
this.stack.Shift(new PdfString(this.lexer.Token, PdfStringFlags.Unicode | PdfStringFlags.HexLiteral));
break;
case Symbol.Name:
this.stack.Shift(new PdfName(this.lexer.Token));
break;
case Symbol.R:
{
Debug.Assert(this.stack.GetItem(-1) is PdfInteger && this.stack.GetItem(-2) is PdfInteger);
PdfObjectID objectID = new PdfObjectID(this.stack.GetInteger(-2), this.stack.GetInteger(-1));
PdfReference iref = this.document.irefTable[objectID];
if (iref == null)
{
// If a document has more than one PdfXRefTable it is possible that the first trailer has
// indirect references to objects whos iref entry is not yet read in.
if (this.document.irefTable.IsUnderConstruction)
{
// XRefTable not complete when trailer is read. Create temporary irefs that are
// removed later in PdfTrailer.FixXRefs.
iref = new PdfReference(objectID, 0);
this.stack.Reduce(iref, 2);
break;
}
// PDF Reference section 3.2.9:
// An indirect reference to an undefined object is not an error;
// it is simply treated as a reference to the null object.
this.stack.Reduce(PdfNull.Value, 2);
// Let's see what null objects are good for...
//Debug.Assert(false, "Null object detected!");
//this.stack.Reduce(PdfNull.Value, 2);
}
else
this.stack.Reduce(iref, 2);
break;
}
case Symbol.BeginArray:
PdfArray array = new PdfArray(this.document);
ReadArray(array, false);
this.stack.Shift(array);
break;
case Symbol.BeginDictionary:
PdfDictionary dict = new PdfDictionary(this.document);
ReadDictionary(dict, false);
this.stack.Shift(dict);
break;
case Symbol.BeginStream:
throw new NotImplementedException();
default:
string error = this.lexer.Token;
Debug.Assert(false, "Unexpected: " + error);
break;
}
}
throw new PdfReaderException("Unexpected end of file.");
}
PdfItem ReadReference(PdfReference iref, bool includeReferences)
{
throw new NotImplementedException("ReadReference");
}
public void Remove(PdfReference iref)
{
ObjectTable.Remove(iref.ObjectID);
}
/// <summary>
/// Recursively converts the page tree into a flat array.
/// </summary>
PdfDictionary[] GetKids(PdfReference iref, PdfPage.InheritedValues values, PdfDictionary parent)
{
// TODO: inherit inheritable keys...
PdfDictionary kid = (PdfDictionary)iref.Value;
if (kid.Elements.GetName(Keys.Type) == "/Page")
{
PdfPage.InheritValues(kid, values);
return new PdfDictionary[] { kid };
}
else
{
Debug.Assert(kid.Elements.GetName(Keys.Type) == "/Pages");
PdfPage.InheritValues(kid, ref values);
List<PdfDictionary> list = new List<PdfDictionary>();
PdfArray kids = kid.Elements["/Kids"] as PdfArray;
//newTHHO 15.10.2007 begin
if (kids == null)
{
PdfReference xref3 = kid.Elements["/Kids"] as PdfReference;
kids = xref3.Value as PdfArray;
}
//newTHHO 15.10.2007 end
foreach (PdfReference xref2 in kids)
list.AddRange(GetKids(xref2, values, kid));
int count = list.Count;
Debug.Assert(count == kid.Elements.GetInteger("/Count"));
//return (PdfDictionary[])list.ToArray(typeof(PdfDictionary));
return list.ToArray();
}
}
/// <summary>
/// Adds a cloned object to this table.
/// </summary>
/// <param name="externalID">The object identifier in the forein object.</param>
/// <param name="iref">The cross reference to the clone of the forein object, which belongs to
/// this document. In general the clone has a different object identifier.</param>
public void Add(PdfObjectID externalID, PdfReference iref)
{
this.externalIDs[externalID.ToString()] = iref;
}
public void Remove(PdfReference iref)
{
this.objectTable.Remove(iref.ObjectID);
}
/// <summary>
/// Reads the compressed object with the specified index in the object stream
/// of the object with the specified object id.
/// </summary>
internal PdfReference ReadCompressedObject(PdfObjectID objectID, int index)
{
PdfReference iref;
#if true
Debug.Assert(_document._irefTable.ObjectTable.ContainsKey(objectID));
if (!_document._irefTable.ObjectTable.TryGetValue(objectID, out iref))
{
throw new NotImplementedException("This case is not coded or something else went wrong");
}
#else
// We should never come here because the object stream must be a type 1 entry in the xref stream
// and iref was created before.
// Has the specified object already an iref in the object table?
if (!_document._irefTable.ObjectTable.TryGetValue(objectID, out iref))
{
try
{
#if true_
iref = new PdfReference(objectID,);
iref.ObjectID = objectID;
_document._irefTable.Add(os);
#else
PdfDictionary dict = (PdfDictionary)ReadObject(null, objectID, false, false);
PdfObjectStream os = new PdfObjectStream(dict);
iref = new PdfReference(os);
iref.ObjectID = objectID;
_document._irefTable.Add(os);
#endif
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
throw;
}
}
#endif
// Read in object stream object when we come here for the very first time.
if (iref.Value == null)
{
try
{
Debug.Assert(_document._irefTable.Contains(iref.ObjectID));
PdfDictionary pdfObject = (PdfDictionary)ReadObject(null, iref.ObjectID, false, false);
PdfObjectStream objectStream = new PdfObjectStream(pdfObject);
Debug.Assert(objectStream.Reference == iref);
// objectStream.Reference = iref; Superfluous, see Assert in line before.
Debug.Assert(objectStream.Reference.Value != null, "Something went wrong.");
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
throw;
}
}
Debug.Assert(iref.Value != null);
PdfObjectStream objectStreamStream = iref.Value as PdfObjectStream;
if (objectStreamStream == null)
{
Debug.Assert(((PdfDictionary)iref.Value).Elements.GetName("/Type") == "/ObjStm");
objectStreamStream = new PdfObjectStream((PdfDictionary)iref.Value);
Debug.Assert(objectStreamStream.Reference == iref);
// objectStream.Reference = iref; Superfluous, see Assert in line before.
Debug.Assert(objectStreamStream.Reference.Value != null, "Something went wrong.");
}
Debug.Assert(objectStreamStream != null);
//PdfObjectStream objectStreamStream = (PdfObjectStream)iref.Value;
if (objectStreamStream == null)
throw new Exception("Something went wrong here.");
return objectStreamStream.ReadCompressedObject(index);
}
/// <summary>
/// Reads cross reference stream(s).
/// </summary>
private PdfTrailer ReadXRefStream(PdfCrossReferenceTable xrefTable)
{
// Read cross reference stream.
//Debug.Assert(_lexer.Symbol == Symbol.Integer);
int number = _lexer.TokenToInteger;
int generation = ReadInteger();
Debug.Assert(generation == 0);
ReadSymbol(Symbol.Obj);
ReadSymbol(Symbol.BeginDictionary);
PdfObjectID objectID = new PdfObjectID(number, generation);
PdfCrossReferenceStream xrefStream = new PdfCrossReferenceStream(_document);
ReadDictionary(xrefStream, false);
ReadSymbol(Symbol.BeginStream);
ReadStream(xrefStream);
//xrefTable.Add(new PdfReference(objectID, position));
PdfReference iref = new PdfReference(xrefStream);
iref.ObjectID = objectID;
iref.Value = xrefStream;
xrefTable.Add(iref);
Debug.Assert(xrefStream.Stream != null);
//string sValue = new RawEncoding().GetString(xrefStream.Stream.UnfilteredValue,);
//sValue.GetType();
byte[] bytesRaw = xrefStream.Stream.UnfilteredValue;
byte[] bytes = bytesRaw;
// HACK: Should be done in UnfilteredValue.
if (xrefStream.Stream.HasDecodeParams)
{
int predictor = xrefStream.Stream.DecodePredictor;
int columns = xrefStream.Stream.DecodeColumns;
bytes = DecodeCrossReferenceStream(bytesRaw, columns, predictor);
}
#if DEBUG_
for (int idx = 0; idx < bytes.Length; idx++)
{
if (idx % 4 == 0)
Console.WriteLine();
Console.Write("{0:000} ", (int)bytes[idx]);
}
Console.WriteLine();
#endif
// bytes.GetType();
// Add to table.
// xrefTable.Add(new PdfReference(objectID, -1));
int size = xrefStream.Elements.GetInteger(PdfCrossReferenceStream.Keys.Size);
PdfArray index = xrefStream.Elements.GetValue(PdfCrossReferenceStream.Keys.Index) as PdfArray;
int prev = xrefStream.Elements.GetInteger(PdfCrossReferenceStream.Keys.Prev);
PdfArray w = (PdfArray)xrefStream.Elements.GetValue(PdfCrossReferenceStream.Keys.W);
// E.g.: W[1 2 1] ¤ Index[7 12] ¤ Size 19
// Setup subsections.
int subsectionCount;
int[][] subsections = null;
int subsectionEntryCount = 0;
if (index == null)
{
// Setup with default values.
subsectionCount = 1;
subsections = new int[subsectionCount][];
subsections[0] = new int[] { 0, size }; // HACK: What is size? Contratiction in PDF reference.
subsectionEntryCount = size;
}
else
{
// Read subsections from array.
Debug.Assert(index.Elements.Count % 2 == 0);
subsectionCount = index.Elements.Count / 2;
subsections = new int[subsectionCount][];
for (int idx = 0; idx < subsectionCount; idx++)
{
subsections[idx] = new int[] { index.Elements.GetInteger(2 * idx), index.Elements.GetInteger(2 * idx + 1) };
subsectionEntryCount += subsections[idx][1];
}
}
// W key.
Debug.Assert(w.Elements.Count == 3);
int[] wsize = { w.Elements.GetInteger(0), w.Elements.GetInteger(1), w.Elements.GetInteger(2) };
int wsum = StreamHelper.WSize(wsize);
if (wsum * subsectionEntryCount != bytes.Length)
GetType();
Debug.Assert(wsum * subsectionEntryCount == bytes.Length, "Check implementation here.");
int testcount = subsections[0][1];
int[] currentSubsection = subsections[0];
#if DEBUG && CORE
if (PdfDiagnostics.TraceXrefStreams)
{
for (int idx = 0; idx < testcount; idx++)
{
uint field1 = StreamHelper.ReadBytes(bytes, idx * wsum, wsize[0]);
uint field2 = StreamHelper.ReadBytes(bytes, idx * wsum + wsize[0], wsize[1]);
uint field3 = StreamHelper.ReadBytes(bytes, idx * wsum + wsize[0] + wsize[1], wsize[2]);
string res = String.Format("{0,2:00}: {1} {2,5} {3} // ", idx, field1, field2, field3);
switch (field1)
{
case 0:
res += "Fee list: object number, generation number";
break;
case 1:
res += "Not compresed: offset, generation number";
break;
case 2:
res += "Compressed: object stream object number, index in stream";
break;
default:
res += "??? Type undefined";
break;
}
Debug.WriteLine(res);
}
}
#endif
int index2 = -1;
for (int ssc = 0; ssc < subsectionCount; ssc++)
{
int abc = subsections[ssc][1];
for (int idx = 0; idx < abc; idx++)
{
index2++;
PdfCrossReferenceStream.CrossReferenceStreamEntry item =
new PdfCrossReferenceStream.CrossReferenceStreamEntry();
item.Type = StreamHelper.ReadBytes(bytes, index2 * wsum, wsize[0]);
item.Field2 = StreamHelper.ReadBytes(bytes, index2 * wsum + wsize[0], wsize[1]);
item.Field3 = StreamHelper.ReadBytes(bytes, index2 * wsum + wsize[0] + wsize[1], wsize[2]);
xrefStream.Entries.Add(item);
switch (item.Type)
{
case 0:
// Nothing to do, not needed.
break;
case 1: // offset / generation number
//// Even it is restricted, an object can exists in more than one subsection.
//// (PDF Reference Implementation Notes 15).
int position = (int)item.Field2;
objectID = ReadObjectNumber(position);
#if DEBUG
if (objectID.ObjectNumber == 1074)
GetType();
#endif
Debug.Assert(objectID.GenerationNumber == item.Field3);
//// Ignore the latter one.
if (!xrefTable.Contains(objectID))
{
#if DEBUG
GetType();
#endif
// Add iref for all uncrompressed objects.
xrefTable.Add(new PdfReference(objectID, position));
}
break;
case 2:
// Nothing to do yet.
break;
}
}
}
return xrefStream;
}
internal PdfFormXObject(PdfDocument thisDocument, PdfImportedObjectTable importedObjectTable, XPdfForm form)
: base(thisDocument)
{
Debug.Assert(importedObjectTable != null);
Debug.Assert(ReferenceEquals(thisDocument, importedObjectTable.Owner));
Elements.SetName(Keys.Type, "/XObject");
Elements.SetName(Keys.Subtype, "/Form");
if (form.IsTemplate)
{
Debug.Assert(importedObjectTable == null);
// TODO more initialization here???
return;
}
XPdfForm pdfForm = form;
// Get import page
PdfPages importPages = importedObjectTable.ExternalDocument.Pages;
if (pdfForm.PageNumber < 1 || pdfForm.PageNumber > importPages.Count)
{
PSSR.ImportPageNumberOutOfRange(pdfForm.PageNumber, importPages.Count, form._path);
}
PdfPage importPage = importPages[pdfForm.PageNumber - 1];
// Import resources
PdfItem res = importPage.Elements["/Resources"];
if (res != null) // unlikely but possible
{
#if true
// Get root object
PdfObject root;
if (res is PdfReference)
{
root = ((PdfReference)res).Value;
}
else
{
root = (PdfDictionary)res;
}
root = ImportClosure(importedObjectTable, thisDocument, root);
// If the root was a direct object, make it indirect.
if (root.Reference == null)
{
thisDocument._irefTable.Add(root);
}
Debug.Assert(root.Reference != null);
Elements["/Resources"] = root.Reference;
#else
// Get transitive closure
PdfObject[] resources = importPage.Owner.Internals.GetClosure(resourcesRoot);
int count = resources.Length;
#if DEBUG_
for (int idx = 0; idx < count; idx++)
{
Debug.Assert(resources[idx].XRef != null);
Debug.Assert(resources[idx].XRef.Document != null);
Debug.Assert(resources[idx].Document != null);
if (resources[idx].ObjectID.ObjectNumber == 12)
{
GetType();
}
}
#endif
// 1st step. Already imported objects are reused and new ones are cloned.
for (int idx = 0; idx < count; idx++)
{
PdfObject obj = resources[idx];
if (importedObjectTable.Contains(obj.ObjectID))
{
// external object was already imported
PdfReference iref = importedObjectTable[obj.ObjectID];
Debug.Assert(iref != null);
Debug.Assert(iref.Value != null);
Debug.Assert(iref.Document == Owner);
// replace external object by the already clone counterpart
resources[idx] = iref.Value;
}
else
{
// External object was not imported earlier and must be cloned
PdfObject clone = obj.Clone();
Debug.Assert(clone.Reference == null);
clone.Document = Owner;
if (obj.Reference != null)
{
// add it to this (the importer) document
Owner.irefTable.Add(clone);
Debug.Assert(clone.Reference != null);
// save old object identifier
importedObjectTable.Add(obj.ObjectID, clone.Reference);
//Debug.WriteLine("Cloned: " + obj.ObjectID.ToString());
}
else
{
// The root object (the /Resources value) is not an indirect object
Debug.Assert(idx == 0);
// add it to this (the importer) document
Owner.irefTable.Add(clone);
Debug.Assert(clone.Reference != null);
}
// replace external object by its clone
resources[idx] = clone;
}
}
#if DEBUG_
for (int idx = 0; idx < count; idx++)
{
Debug.Assert(resources[idx].XRef != null);
Debug.Assert(resources[idx].XRef.Document != null);
Debug.Assert(resources[idx].Document != null);
if (resources[idx].ObjectID.ObjectNumber == 12)
{
GetType();
}
}
#endif
// 2nd step. Fix up indirect references that still refers to the import document.
for (int idx = 0; idx < count; idx++)
{
PdfObject obj = resources[idx];
Debug.Assert(obj.Owner != null);
FixUpObject(importedObjectTable, importedObjectTable.Owner, obj);
}
// Set resources key to the root of the clones
Elements["/Resources"] = resources[0].Reference;
#endif
}
// Take /Rotate into account.
PdfRectangle rect = importPage.Elements.GetRectangle(PdfPage.Keys.MediaBox);
// Reduce rotation to 0, 90, 180, or 270.
int rotate = (importPage.Elements.GetInteger(PdfPage.Keys.Rotate) % 360 + 360) % 360;
//rotate = 0;
if (rotate == 0)
{
// Set bounding box to media box.
Elements["/BBox"] = rect;
}
else
{
// TODO: Have to adjust bounding box? (I think not, but I'm not sure -> wait for problem)
Elements["/BBox"] = rect;
// Rotate the image such that it is upright.
XMatrix matrix = new XMatrix();
double width = rect.Width;
double height = rect.Height;
matrix.RotateAtPrepend(-rotate, new XPoint(width / 2, height / 2));
// Translate the image such that its center lies on the center of the rotated bounding box.
double offset = (height - width) / 2;
if (rotate == 90)
{
// TODO It seems we can simplify this as the sign of offset changes too.
if (height > width)
{
matrix.TranslatePrepend(offset, offset); // Tested.
}
else
{
matrix.TranslatePrepend(offset, offset); // TODO Test case.
}
}
else if (rotate == 270)
{
// TODO It seems we can simplify this as the sign of offset changes too.
if (height > width)
{
matrix.TranslatePrepend(-offset, -offset); // Tested.
}
else
{
matrix.TranslatePrepend(-offset, -offset); // Tested.
}
}
//string item = "[" + PdfEncoders.ToString(matrix) + "]";
//Elements[Keys.Matrix] = new PdfLiteral(item);
Elements.SetMatrix(Keys.Matrix, matrix);
}
// Preserve filter because the content keeps unmodified.
PdfContent content = importPage.Contents.CreateSingleContent();
#if !DEBUG
content.Compressed = true;
#endif
PdfItem filter = content.Elements["/Filter"];
if (filter != null)
{
Elements["/Filter"] = filter.Clone();
}
// (no cloning needed because the bytes keep untouched)
Stream = content.Stream; // new PdfStream(bytes, this);
Elements.SetInteger("/Length", content.Stream.Value.Length);
}
/// <summary>
/// Replace all indirect references to external objects by their cloned counterparts
/// owned by the importer document.
/// </summary>
void FixUpObject_old(PdfImportedObjectTable iot, PdfObject value)
{
// TODO: merge with PdfXObject.FixUpObject
PdfDictionary dict;
PdfArray array;
if ((dict = value as PdfDictionary) != null)
{
// Set document for cloned direct objects
if (dict.Owner == null)
{
dict.Document = Owner;
}
else
{
Debug.Assert(dict.Owner == Owner);
}
// Search for indirect references in all keys
PdfName[] names = dict.Elements.KeyNames;
foreach (PdfName name in names)
{
PdfItem item = dict.Elements[name];
// Is item an iref?
PdfReference iref = item as PdfReference;
if (iref != null)
{
// Does the iref already belong to this document?
if (iref.Document == Owner)
{
// Yes: fine
continue;
}
else
{
Debug.Assert(iref.Document == iot.ExternalDocument);
// No: replace with iref of cloned object
PdfReference newXRef = iot[iref.ObjectID];
Debug.Assert(newXRef != null);
Debug.Assert(newXRef.Document == Owner);
dict.Elements[name] = newXRef;
}
}
else if (item is PdfObject)
{
// Fix up inner objects
FixUpObject_old(iot, (PdfObject)item);
}
}
}
else if ((array = value as PdfArray) != null)
{
// Set document for cloned direct objects
if (array.Owner == null)
{
array.Document = Owner;
}
else
{
Debug.Assert(array.Owner == Owner);
}
// Search for indirect references in all array elements
int count = array.Elements.Count;
for (int idx = 0; idx < count; idx++)
{
PdfItem item = array.Elements[idx];
// Is item an iref?
PdfReference iref = item as PdfReference;
if (iref != null)
{
// Does the iref belongs to this document?
if (iref.Document == Owner)
{
// Yes: fine
continue;
}
else
{
Debug.Assert(iref.Document == iot.ExternalDocument);
// No: replace with iref of cloned object
PdfReference newXRef = iot[iref.ObjectID];
Debug.Assert(newXRef != null);
Debug.Assert(newXRef.Document == Owner);
array.Elements[idx] = newXRef;
}
}
else if (item is PdfObject)
{
// Fix up inner objects
FixUpObject_old(iot, (PdfObject)item);
}
}
}
}
void TransitiveClosureImplementation(Dictionary <PdfItem, object> objects, PdfObject pdfObject /*, ref int depth*/)
{
try
{
_nestingLevel++;
if (_nestingLevel >= 1000)
{
if (!_overflow.ContainsKey(pdfObject))
{
_overflow.Add(pdfObject, null);
}
return;
}
#if DEBUG_
//enterCount++;
if (enterCount == 5400)
{
GetType();
}
//if (!Object.ReferenceEquals(pdfObject.Owner, _document))
// GetType();
//////Debug.Assert(Object.ReferenceEquals(pdfObject27.Document, _document));
// if (item is PdfObject && ((PdfObject)item).ObjectID.ObjectNumber == 5)
// Debug.WriteLine("items: " + ((PdfObject)item).ObjectID.ToString());
//if (pdfObject.ObjectNumber == 5)
// GetType();
#endif
IEnumerable enumerable = null; //(IEnumerator)pdfObject;
PdfDictionary dict;
PdfArray array;
if ((dict = pdfObject as PdfDictionary) != null)
{
enumerable = dict.Elements.Values;
}
else if ((array = pdfObject as PdfArray) != null)
{
enumerable = array.Elements;
}
else
{
Debug.Assert(false, "Should not come here.");
}
if (enumerable != null)
{
foreach (PdfItem item in enumerable)
{
PdfReference iref = item as PdfReference;
if (iref != null)
{
// Is this an indirect reference to an object that does not exist?
//if (iref.Document == null)
//{
// Debug.WriteLine("Dead object detected: " + iref.ObjectID.ToString());
// PdfReference dead = DeadObject;
// iref.ObjectID = dead.ObjectID;
// iref.Document = _document;
// iref.SetObject(dead.Value);
// PdfDictionary dict = (PdfDictionary)dead.Value;
// dict.Elements["/DeadObjectCount"] =
// new PdfInteger(dict.Elements.GetInteger("/DeadObjectCount") + 1);
// iref = dead;
//}
if (!ReferenceEquals(iref.Document, _document))
{
GetType();
Debug.WriteLine(String.Format("Bad iref: {0}", iref.ObjectID.ToString()));
}
Debug.Assert(ReferenceEquals(iref.Document, _document) || iref.Document == null, "External object detected!");
#if DEBUG_
if (iref.ObjectID.ObjectNumber == 23)
{
GetType();
}
#endif
if (!objects.ContainsKey(iref))
{
PdfObject value = iref.Value;
// Ignore unreachable objets.
if (iref.Document != null)
{
// ... from trailer hack
if (value == null)
{
iref = ObjectTable[iref.ObjectID];
Debug.Assert(iref.Value != null);
value = iref.Value;
}
Debug.Assert(ReferenceEquals(iref.Document, _document));
objects.Add(iref, null);
//Debug.WriteLine(String.Format("objects.Add('{0}', null);", iref.ObjectID.ToString()));
if (value is PdfArray || value is PdfDictionary)
{
TransitiveClosureImplementation(objects, value /*, ref depth*/);
}
}
//else
//{
// objects2.Add(this[iref.ObjectID], null);
//}
}
}
else
{
PdfObject pdfObject28 = item as PdfObject;
//if (pdfObject28 != null)
// Debug.Assert(Object.ReferenceEquals(pdfObject28.Document, _document));
if (pdfObject28 != null && (pdfObject28 is PdfDictionary || pdfObject28 is PdfArray))
{
TransitiveClosureImplementation(objects, pdfObject28 /*, ref depth*/);
}
}
}
}
}
finally
{
_nestingLevel--;
}
}
public void Write(PdfReference iref)
{
WriteSeparator(CharCat.Character);
WriteRaw(iref.ToString());
this.lastCat = CharCat.Character;
}
/// <summary>
/// Reads the compressed object with the specified index.
/// </summary>
internal void ReadReferences(PdfCrossReferenceTable xrefTable)
{
////// Create parser for stream.
////Parser parser = new Parser(_document, new MemoryStream(Stream.Value));
for (int idx = 0; idx < _header.Length; idx++)
{
int objectNumber = _header[idx][0];
int offset = _header[idx][1];
PdfObjectID objectID = new PdfObjectID(objectNumber);
// HACK: -1 indicates compressed object.
PdfReference iref = new PdfReference(objectID, -1);
////iref.ObjectID = objectID;
////iref.Value = xrefStream;
if (!xrefTable.Contains(iref.ObjectID))
{
xrefTable.Add(iref);
}
else
{
GetType();
}
}
}