public int Compare(object x, object y)
{
PdfFileObject a = x as PdfFileObject;
PdfFileObject b = y as PdfFileObject;
return(a.ObjID.CompareTo(b.ObjID));
}
private PdfFileObject ParseTrailer(long xref)
{
PdfFileObject pfo = new PdfFileObject(this);
pfo.OriginalText = "";
pfo.ObjID = 0;
pfo.Type = PdfObjectTypes.Trailer;
this.inputStream.Seek(xref, SeekOrigin.Begin);
StreamReader sr = new StreamReader(this.inputStream);
string line;
bool istrailer = false;
while ((line = sr.ReadLine()) != null)
{
line = line.Trim();
if (line == "startxref")
{
return(pfo);
}
if (line.StartsWith("trailer"))
{
pfo.OriginalText = "";
istrailer = true;
}
if (istrailer)
{
pfo.OriginalText += line + "\r";
}
}
throw new Exception("Cannot find trailer");
}
internal void PopulateRelatedObjects(Hashtable container)
{
if (!container.ContainsKey(this.ObjID))
{
container.Add(this.ObjID, this);
Match m = regex1.Match(this.OriginalText);
while (m.Success)
{
int num = int.Parse(m.Groups["id"].Value);
bool notparent = m.Groups["parent"].Length == 0;
if (notparent)
{
if (!container.Contains(num))
{
PdfFileObject pfo = this.pdfFileParser.ReadObject(num);
if (pfo != null)
{
pfo.PopulateRelatedObjects(container);
}
}
}
m = m.NextMatch();
}
}
}
internal PdfFileObject CreateFileObject(PdfParser analyzer)
{
PdfFileObject pfo = new PdfFileObject(analyzer);
pfo.ObjID = this.ObjID;
pfo.OriginalObjectAbsolutePosition = this.Address;
pfo.OriginalObjectLength = this.Length;
pfo.StreamPosition = this.StreamPosition;
pfo.StreamLength = this.StreamLength;
return(pfo);
}
internal List <PdfFileObject> GetStreamObjects()
{
List <PdfFileObject> objects = new List <PdfFileObject>();
if (this.Type != PdfObjectTypes.ObjStm)
{
return(objects);
}
string txt = this.StreamContent2Inflated;
if (txt == null)
{
return(new List <PdfFileObject>());
}
int n = this.GetInt32Value("N").Value;
string regex = "";
for (int x = 0; x < n; x++)
{
regex += @"(\d+)\s+(\d+)\s+";
}
Match m = Regex.Match(txt, regex);
for (int x = 0; x < n; x++)
{
PdfFileObject pfo = new PdfFileObject(this.pdfFileParser);
pfo.ObjID = int.Parse(m.Groups[x * 2 + 1].Value);
int position = int.Parse(m.Groups[x * 2 + 2].Value);
if (x == n - 1)
{
pfo.OriginalText = pfo.ObjID + " 0 obj " + txt.Substring(m.Length + position) + "\nendobj\n";
}
else
{
int length = int.Parse(m.Groups[x * 2 + 4].Value) - position;
pfo.OriginalText = pfo.ObjID + " 0 obj " + txt.Substring(m.Length + position, length) + "\nendobj\n";
}
objects.Add(pfo);
}
return(objects);
}
internal virtual void Transform(Hashtable TransformationTable)
{
if (transformed)
{
throw new Exception("Already transformed!");
}
transformed = true;
if (this.Type == PdfObjectTypes.Page)
{
}
this.TransformationTable = TransformationTable;
this.TransformatedObjID = (int)this.TransformationTable[this.ObjID];
this.filterEval = new MatchEvaluator(this.FilterEval);
this.TransformatedTextPart = this.OriginalTextPart;
if (this.Type == PdfObjectTypes.Page && this.MediaBoxText == "")
{
PdfFileObject parent = this.GetParent();
while (parent != null)
{
string mb = parent.MediaBoxText;
if (mb == "")
{
parent = parent.GetParent();
}
else
{
this.TransformatedTextPart = Regex.Replace(this.TransformatedTextPart, @"/Type\s*/Page", "/Type /Page\r" + mb);
parent = null;
}
}
}
this.TransformatedTextPart = Regex.Replace(this.TransformatedTextPart
, @"(?'id'\d+)(?'rest' 0 (obj|R))(?'end'[^G])", this.filterEval, RegexOptions.ExplicitCapture);
this.TransformatedTextPart = Regex.Replace(this.TransformatedTextPart
, @"/Parent\s+(\d+ 0 R)*", "/Parent 2 0 R \r");
}
internal List<PdfFileObject> GetStreamObjects()
{
List<PdfFileObject> objects = new List<PdfFileObject>();
if (this.Type != PdfObjectTypes.ObjStm)
return objects;
string txt = this.StreamContent2Inflated;
if (txt == null)
return new List<PdfFileObject>();
int n = this.GetInt32Value("N").Value;
string regex = "";
for (int x = 0; x < n; x++)
{
regex += @"(\d+)\s+(\d+)\s+";
}
Match m = Regex.Match(txt, regex);
for (int x = 0; x < n; x++)
{
PdfFileObject pfo = new PdfFileObject(this.pdfFileParser);
pfo.ObjID = int.Parse(m.Groups[x * 2 + 1].Value);
int position = int.Parse(m.Groups[x * 2 + 2].Value);
if (x == n - 1)
{
pfo.OriginalText = pfo.ObjID + " 0 obj " + txt.Substring(m.Length + position) + "\nendobj\n";
}
else
{
int length = int.Parse(m.Groups[x * 2 + 4].Value) - position;
pfo.OriginalText = pfo.ObjID + " 0 obj " + txt.Substring(m.Length + position, length) + "\nendobj\n";
}
objects.Add(pfo);
}
return objects;
}
internal Dictionary <int, PdfFileObject> LoadObjects(Stream s)
{
s.Seek(0, SeekOrigin.Begin);
Dictionary <int, PdfFileObject> objects = new Dictionary <int, PdfFileObject>();
int c = 0, objIDCandidate = 0, streamLengthCandidate = -1;
long streamPositionCandidate = -2;
long addressCandidate = -1, step = 0, position = 0;
ObjectAddress oa = null;
while ((c = s.ReadByte()) != -1)
{
switch (step)
{
case 0:
if (oa != null)
{
if (c == ' ' || c == '\r' || c == '\n')
{
oa.Length++;
}
else
{
PdfFileObject pfo = oa.CreateFileObject(this);
if (pfo.OriginalObjectAbsolutePosition == this.startxref)
{
this.trailer = pfo;
}
objects[oa.ObjID] = pfo;
this.inputStream.Seek(position + 1, SeekOrigin.Begin);
oa = null;
streamPositionCandidate = -2;
streamLengthCandidate = -1;
}
}
if (c > 48 && c < 58)
{
addressCandidate = position;
objIDCandidate = c - 48;
step = 1;
}
break;
case 1:
if (c > 47 && c < 58)
{
objIDCandidate = objIDCandidate * 10 + c - 48;
}
else
{
step = (c == ' ') ? 2 : 0;
}
break;
case 2:
step = (c == '0') ? 3 : 0;
break;
case 3:
step = (c == ' ') ? 4 : 0;
break;
case 4:
step = (c == 'o') ? 5 : 0;
break;
case 5:
step = (c == 'b') ? 6 : 0;
break;
case 6:
if (c == 'j')
{
step = 7;
}
else
{
step = 0;
}
break;
case 7:
if (objIDCandidate != lastObjID)
{
lastObjID = objIDCandidate;
}
if (objIDCandidate == 8)
{
if (c == '>')
{
}
}
if (c == 'e')
{
// possible beginning of stream
step = 29;
}
if (c == 's')
{
step = 9;
break;
}
break;
case 8:
if (c == 's')
{
step++;
break;
}
if (c == 'e')
{
step = 29;
break;
}
if (c == '\r' || c == '\n' || c == ' ')
{
break;
}
step = 7;
break;
case 9:
step = (c == 't') ? 10 : 7;
break;
case 10:
step = (c == 'r') ? 11 : 7;
break;
case 11:
step = (c == 'e') ? 12 : 7;
break;
case 12:
step = (c == 'a') ? 13 : 7;
break;
case 13:
step = (c == 'm') ? 14 : 7;
break;
case 14:
step = (c == '\r' || c == '\n' || c == ' ') ? 15 : 7;
break;
case 15:
if (c == '\r' || c == '\n' || c == ' ')
{
}
else
{
step++;
streamPositionCandidate = position;
}
break;
case 16:
if (c == 'e')
{
step++;
break;
}
streamLengthCandidate = (int)(position - streamPositionCandidate + 1);
break;
case 17:
step = (c == 'n') ? 18 : 16;
break;
case 18:
step = (c == 'd') ? 19 : 16;
break;
case 19:
if (c == 'o')
{
step = 32;
break;
}
if (c == 's')
{
step = 20;
break;
}
step = 16;
break;
case 20:
step = (c == 't') ? 21 : 16;
break;
case 21:
step = (c == 'r') ? 22 : 16;
break;
case 22:
step = (c == 'e') ? 23 : 16;
break;
case 23:
step = (c == 'a') ? 24 : 16;
break;
case 24:
step = (c == 'm') ? 25 : 16;
break;
case 25:
step = (c == '\r' || c == '\n' || c == ' ') ? 28 : 16;
break;
case 28:
step = (c == 'e') ? 29 : 7;
break;
case 29:
step = (c == 'n') ? 30 : 7;
break;
case 30:
step = (c == 'd') ? 31 : 7;
break;
case 31:
step = (c == 'o') ? 32 : 7;
break;
case 32:
step = (c == 'b') ? 33 : 7;
break;
case 33:
if (c == 'j')
{
step = 0;
if (objIDCandidate == 140)
{
}
oa = new ObjectAddress(objIDCandidate, addressCandidate
, (int)(position - addressCandidate + 1), streamPositionCandidate, streamLengthCandidate);
}
else
{
step = 7;
}
break;
}
position++;
}
List <PdfFileObject> ObjStms = new List <PdfFileObject>();
foreach (PdfFileObject pfo in objects.Values)
{
if (pfo.Type == PdfObjectTypes.ObjStm)
{
ObjStms.Add(pfo);
}
}
foreach (PdfFileObject ObjStm in ObjStms)
{
foreach (PdfFileObject pfo2 in ObjStm.GetStreamObjects())
{
objects[pfo2.ObjID] = pfo2;
}
}
return(objects);
}
internal PdfFileObject CreateFileObject(PdfParser analyzer)
{
PdfFileObject pfo = new PdfFileObject(analyzer);
pfo.ObjID = this.ObjID;
pfo.OriginalObjectAbsolutePosition = this.Address;
pfo.OriginalObjectLength = this.Length;
pfo.StreamPosition = this.StreamPosition;
pfo.StreamLength = this.StreamLength;
return pfo;
}
internal Dictionary<int, PdfFileObject> LoadObjects(Stream s)
{
s.Seek(0, SeekOrigin.Begin);
Dictionary<int, PdfFileObject> objects = new Dictionary<int, PdfFileObject>();
int c = 0, objIDCandidate = 0, streamLengthCandidate = -1;
long streamPositionCandidate = -2;
long addressCandidate = -1, step = 0, position = 0;
ObjectAddress oa = null;
while ((c = s.ReadByte()) != -1)
{
switch (step)
{
case 0:
if (oa != null)
{
if (c == ' ' || c == '\r' || c == '\n')
{
oa.Length++;
}
else
{
PdfFileObject pfo = oa.CreateFileObject(this);
if (pfo.OriginalObjectAbsolutePosition == this.startxref)
{
this.trailer = pfo;
}
objects[oa.ObjID] = pfo;
this.inputStream.Seek(position+1, SeekOrigin.Begin);
oa = null;
streamPositionCandidate = -2;
streamLengthCandidate = -1;
}
}
if (c > 48 && c < 58)
{
addressCandidate = position;
objIDCandidate = c - 48;
step = 1;
}
break;
case 1:
if (c > 47 && c < 58)
{
objIDCandidate = objIDCandidate * 10 + c - 48;
}
else
{
step = (c == ' ') ? 2 : 0;
}
break;
case 2:
step = (c == '0') ? 3 : 0;
break;
case 3:
step = (c == ' ') ? 4 : 0;
break;
case 4:
step = (c == 'o') ? 5 : 0;
break;
case 5:
step = (c == 'b') ? 6 : 0;
break;
case 6:
if (c == 'j')
{
step = 7;
}
else
{
step = 0;
}
break;
case 7:
if (objIDCandidate !=lastObjID)
{
lastObjID = objIDCandidate;
}
if (objIDCandidate == 8)
{
if (c == '>')
{
}
}
if (c == 'e')
{
// possible beginning of stream
step = 29;
}
if (c == 's')
{
step = 9;
break;
}
break;
case 8:
if (c == 's')
{
step++;
break;
}
if (c == 'e')
{
step = 29;
break;
}
if (c == '\r' || c == '\n' || c == ' ')
{
break;
}
step = 7;
break;
case 9:
step = (c == 't') ? 10 : 7;
break;
case 10:
step = (c == 'r') ? 11 : 7;
break;
case 11:
step = (c == 'e') ? 12 : 7;
break;
case 12:
step = (c == 'a') ? 13 : 7;
break;
case 13:
step = (c == 'm') ? 14 : 7;
break;
case 14:
step = (c == '\r' || c == '\n' || c == ' ') ? 15 : 7;
break;
case 15:
if (c == '\r' ||c == '\n' || c == ' ')
{
}
else
{
step++;
streamPositionCandidate = position;
}
break;
case 16:
if (c == 'e')
{
step++;
break;
}
streamLengthCandidate = (int)(position - streamPositionCandidate + 1);
break;
case 17:
step = (c == 'n') ? 18 : 16;
break;
case 18:
step = (c == 'd') ? 19 : 16;
break;
case 19:
if (c == 'o')
{
step = 32;
break;
}
if (c == 's')
{
step = 20;
break;
}
step = 16;
break;
case 20:
step = (c == 't') ? 21 : 16;
break;
case 21:
step = (c == 'r') ? 22 : 16;
break;
case 22:
step = (c == 'e') ? 23 : 16;
break;
case 23:
step = (c == 'a') ? 24 : 16;
break;
case 24:
step = (c == 'm') ? 25 : 16;
break;
case 25:
step = (c == '\r' || c == '\n' || c == ' ') ? 28 : 16;
break;
case 28:
step = (c == 'e') ? 29 : 7;
break;
case 29:
step = (c == 'n') ? 30 : 7;
break;
case 30:
step = (c == 'd') ? 31 : 7;
break;
case 31:
step = (c == 'o') ? 32 : 7;
break;
case 32:
step = (c == 'b') ? 33 : 7;
break;
case 33:
if (c == 'j')
{
step = 0;
if (objIDCandidate == 140)
{
}
oa = new ObjectAddress(objIDCandidate, addressCandidate
,(int)( position - addressCandidate+1),streamPositionCandidate,streamLengthCandidate);
}
else
{
step = 7;
}
break;
}
position++;
}
List<PdfFileObject> ObjStms = new List<PdfFileObject>();
foreach (PdfFileObject pfo in objects.Values)
{
if (pfo.Type == PdfObjectTypes.ObjStm)
{
ObjStms.Add(pfo);
}
}
foreach (PdfFileObject ObjStm in ObjStms)
{
foreach (PdfFileObject pfo2 in ObjStm.GetStreamObjects())
{
objects[pfo2.ObjID] = pfo2;
}
}
return objects;
}
private PdfFileObject ParseTrailer(long xref)
{
PdfFileObject pfo = new PdfFileObject(this);
pfo.OriginalText = "";
pfo.ObjID = 0;
pfo.Type = PdfObjectTypes.Trailer;
this.inputStream.Seek(xref, SeekOrigin.Begin);
StreamReader sr = new StreamReader(this.inputStream);
string line;
bool istrailer = false;
while ((line = sr.ReadLine()) != null)
{
line = line.Trim();
if (line == "startxref")
{
return pfo;
}
if (line.StartsWith("trailer"))
{
pfo.OriginalText = "";
istrailer = true;
}
if (istrailer)
{
pfo.OriginalText += line + "\r";
}
}
throw new Exception("Cannot find trailer");
}
public void Add(PdfParser pdfParser, int[] PageNumbers)
{
if (this.CancelPending)
{
return;
}
this.PdfMergerProgress(this, new PdfMergerProgressEventArgs(this.elementCount,
0, 0, "Analyzing PDF Structure"));
PdfFileObject[] pages = pdfParser.GetAllPages();
ArrayList selectedPages = new ArrayList();
#region gets needed objects
Hashtable relatedObjects = new Hashtable();
if (PageNumbers == null)
{
List <int> ps = new List <int>();
for (int p = 0; p < pages.Length; p++)
{
ps.Add(p);
}
PageNumbers = ps.ToArray();
}
int currentPageIndex = 1, pageCount = PageNumbers.Length;
int step = Math.Max(pageCount / 20, 10);
foreach (int pageNumber in PageNumbers)
{
if (this.CancelPending)
{
return;
}
if (currentPageIndex % step == 0 || currentPageIndex == pageCount)
{
this.PdfMergerProgress(this, new PdfMergerProgressEventArgs(this.elementCount,
currentPageIndex, pageCount, "Analyzing Page {0} of {1}"));
}
PdfFileObject selectedPage = pages[pageNumber];
selectedPages.Add(selectedPage);
selectedPage.PopulateRelatedObjects(relatedObjects);
currentPageIndex++;
}
ArrayList neededObjects = new ArrayList();
neededObjects.AddRange(relatedObjects.Values);
neededObjects.Sort(new PdfFileObjectNumberComparer());
#endregion
#region creates IDs transformation table
int objectIndex = 1;
int objectCount = neededObjects.Count;
step = Math.Max(objectCount / 20, 50);
Hashtable transformationTable = new Hashtable();
foreach (PdfFileObject pfo in neededObjects)
{
if (this.CancelPending)
{
return;
}
if (objectIndex % step == 0 || objectIndex == objectCount)
{
this.PdfMergerProgress(this, new PdfMergerProgressEventArgs(this.elementCount,
objectIndex, objectCount, "Rebuilding Indexes for object {0} of {1}"));
}
string hash = OptimizeStreams?pfo.Hash:null;
if (hash != null && this.alreadyUsedObjects.ContainsKey(hash))
{
pfo.excludedByHashComparison = true;
transformationTable.Add(pfo.ObjID, (int)this.alreadyUsedObjects[hash]);
}
else
{
number++;
transformationTable.Add(pfo.ObjID, number);
if (hash != null)
{
this.alreadyUsedObjects.Add(hash, number);
}
}
objectIndex++;
}
#endregion
objectIndex = 1;
foreach (PdfFileObject pfo in neededObjects)
{
if (this.CancelPending)
{
return;
}
if (objectIndex % step == 0 || objectIndex == objectCount)
{
this.PdfMergerProgress(this, new PdfMergerProgressEventArgs(this.elementCount,
objectIndex, objectCount, "Writing object {0} of {1}"));
}
pfo.Transform(transformationTable);
if (!pfo.excludedByHashComparison)
{
this.xrefs.Add(pos);
this.pos += pfo.WriteToStream(this.target);
}
pfo.TransformatedTextPart = null;
objectIndex++;
}
foreach (PdfFileObject selectedPage in selectedPages)
{
this.pageNumbers.Add(selectedPage.TransformatedObjID);
}
this.elementCount++;
}
