using System;
using System.Collections;
using System.IO;
using iTextSharp.text;
/*
* $Id: PdfCopy.cs,v 1.23 2007/08/31 11:56:12 psoares33 Exp $
* $Name: $
*
* Copyright 1999, 2000, 2001, 2002 Bruno Lowagie
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (the "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* This module by Mark Thompson. Copyright (C) 2002 Mark Thompson
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
namespace iTextSharp.text.pdf {
/**
* Make copies of PDF documents. Documents can be edited after reading and
* before writing them out.
* @author Mark Thompson
*/
public class PdfCopy : PdfWriter {
/**
* This class holds information about indirect references, since they are
* renumbered by iText.
*/
internal class IndirectReferences {
PdfIndirectReference theRef;
bool hasCopied;
internal IndirectReferences(PdfIndirectReference refi) {
theRef = refi;
hasCopied = false;
}
internal void SetCopied() { hasCopied = true; }
internal bool Copied {
get {
return hasCopied;
}
}
internal PdfIndirectReference Ref {
get {
return theRef;
}
}
};
protected Hashtable indirects;
protected Hashtable indirectMap;
protected int currentObjectNum = 1;
protected PdfReader reader;
protected PdfIndirectReference acroForm;
protected int[] namePtr = {0};
/** Holds value of property rotateContents. */
private bool rotateContents = true;
protected internal PdfArray fieldArray;
protected internal Hashtable fieldTemplates;
/**
* A key to allow us to hash indirect references
*/
protected class RefKey {
internal int num;
internal int gen;
internal RefKey(int num, int gen) {
this.num = num;
this.gen = gen;
}
internal RefKey(PdfIndirectReference refi) {
num = refi.Number;
gen = refi.Generation;
}
internal RefKey(PRIndirectReference refi) {
num = refi.Number;
gen = refi.Generation;
}
public override int GetHashCode() {
return (gen<<16)+num;
}
public override bool Equals(Object o) {
if (!(o is RefKey)) return false;
RefKey other = (RefKey)o;
return this.gen == other.gen && this.num == other.num;
}
public override String ToString() {
return "" + num + " " + gen;
}
}
/**
* Constructor
* @param document
* @param os outputstream
*/
public PdfCopy(Document document, Stream os) : base(new PdfDocument(), os) {
document.AddDocListener(pdf);
pdf.AddWriter(this);
indirectMap = new Hashtable();
}
/** Checks if the content is automatically adjusted to compensate
* the original page rotation.
* @return the auto-rotation status
*/
/** Flags the content to be automatically adjusted to compensate
* the original page rotation. The default is <CODE>true</CODE>.
* @param rotateContents <CODE>true</CODE> to set auto-rotation, <CODE>false</CODE>
* otherwise
*/
public bool RotateContents {
set {
rotateContents = value;
}
get {
return rotateContents;
}
}
/**
* Grabs a page from the input document
* @param reader the reader of the document
* @param pageNumber which page to get
* @return the page
*/
public override PdfImportedPage GetImportedPage(PdfReader reader, int pageNumber) {
if (currentPdfReaderInstance != null) {
if (currentPdfReaderInstance.Reader != reader) {
try {
currentPdfReaderInstance.Reader.Close();
currentPdfReaderInstance.ReaderFile.Close();
}
catch (IOException) {
// empty on purpose
}
currentPdfReaderInstance = reader.GetPdfReaderInstance(this);
}
}
else {
currentPdfReaderInstance = reader.GetPdfReaderInstance(this);
}
return currentPdfReaderInstance.GetImportedPage(pageNumber);
}
/**
* Translate a PRIndirectReference to a PdfIndirectReference
* In addition, translates the object numbers, and copies the
* referenced object to the output file.
* NB: PRIndirectReferences (and PRIndirectObjects) really need to know what
* file they came from, because each file has its own namespace. The translation
* we do from their namespace to ours is *at best* heuristic, and guaranteed to
* fail under some circumstances.
*/
protected virtual PdfIndirectReference CopyIndirect(PRIndirectReference inp) {
PdfIndirectReference theRef;
RefKey key = new RefKey(inp);
IndirectReferences iRef = (IndirectReferences)indirects[key] ;
if (iRef != null) {
theRef = iRef.Ref;
if (iRef.Copied) {
return theRef;
}
}
else {
theRef = body.PdfIndirectReference;
iRef = new IndirectReferences(theRef);
indirects[key] = iRef;
}
PdfObject obj = PdfReader.GetPdfObjectRelease(inp);
if (obj != null && obj.IsDictionary()) {
PdfObject type = PdfReader.GetPdfObjectRelease(((PdfDictionary)obj).Get(PdfName.TYPE));
if (type != null && PdfName.PAGE.Equals(type)) {
return theRef;
}
}
iRef.SetCopied();
obj = CopyObject(obj);
AddToBody(obj, theRef);
return theRef;
}
/**
* Translate a PRDictionary to a PdfDictionary. Also translate all of the
* objects contained in it.
*/
protected PdfDictionary CopyDictionary(PdfDictionary inp) {
PdfDictionary outp = new PdfDictionary();
PdfObject type = PdfReader.GetPdfObjectRelease(inp.Get(PdfName.TYPE));
foreach (PdfName key in inp.Keys) {
PdfObject value = inp.Get(key);
if (type != null && PdfName.PAGE.Equals(type)) {
if (!key.Equals(PdfName.B) && !key.Equals(PdfName.PARENT))
outp.Put(key, CopyObject(value));
}
else
outp.Put(key, CopyObject(value));
}
return outp;
}
/**
* Translate a PRStream to a PdfStream. The data part copies itself.
*/
protected PdfStream CopyStream(PRStream inp) {
PRStream outp = new PRStream(inp, null);
foreach (PdfName key in inp.Keys) {
PdfObject value = inp.Get(key);
outp.Put(key, CopyObject(value));
}
return outp;
}
/**
* Translate a PRArray to a PdfArray. Also translate all of the objects contained
* in it
*/
protected PdfArray CopyArray(PdfArray inp) {
PdfArray outp = new PdfArray();
foreach (PdfObject value in inp.ArrayList) {
outp.Add(CopyObject(value));
}
return outp;
}
/**
* Translate a PR-object to a Pdf-object
*/
protected PdfObject CopyObject(PdfObject inp) {
if (inp == null)
return PdfNull.PDFNULL;
switch (inp.Type) {
case PdfObject.DICTIONARY:
return CopyDictionary((PdfDictionary)inp);
case PdfObject.INDIRECT:
return CopyIndirect((PRIndirectReference)inp);
case PdfObject.ARRAY:
return CopyArray((PdfArray)inp);
case PdfObject.NUMBER:
case PdfObject.NAME:
case PdfObject.STRING:
case PdfObject.NULL:
case PdfObject.BOOLEAN:
case 0:
return inp;
case PdfObject.STREAM:
return CopyStream((PRStream)inp);
// return in;
default:
if (inp.Type < 0) {
String lit = ((PdfLiteral)inp).ToString();
if (lit.Equals("true") || lit.Equals("false")) {
return new PdfBoolean(lit);
}
return new PdfLiteral(lit);
}
return null;
}
}
/**
* convenience method. Given an importedpage, set our "globals"
*/
protected int SetFromIPage(PdfImportedPage iPage) {
int pageNum = iPage.PageNumber;
PdfReaderInstance inst = currentPdfReaderInstance = iPage.PdfReaderInstance;
reader = inst.Reader;
SetFromReader(reader);
return pageNum;
}
/**
* convenience method. Given a reader, set our "globals"
*/
protected void SetFromReader(PdfReader reader) {
this.reader = reader;
indirects = (Hashtable)indirectMap[reader] ;
if (indirects == null) {
indirects = new Hashtable();
indirectMap[reader] = indirects;
PdfDictionary catalog = reader.Catalog;
PRIndirectReference refi = null;
PdfObject o = catalog.Get(PdfName.ACROFORM);
if (o == null || o.Type != PdfObject.INDIRECT)
return;
refi = (PRIndirectReference)o;
if (acroForm == null) acroForm = body.PdfIndirectReference;
indirects[new RefKey(refi)] = new IndirectReferences(acroForm);
}
}
/**
* Add an imported page to our output
* @param iPage an imported page
* @throws IOException, BadPdfFormatException
*/
public void AddPage(PdfImportedPage iPage) {
int pageNum = SetFromIPage(iPage);
PdfDictionary thePage = reader.GetPageN(pageNum);
PRIndirectReference origRef = reader.GetPageOrigRef(pageNum);
reader.ReleasePage(pageNum);
RefKey key = new RefKey(origRef);
PdfIndirectReference pageRef;
IndirectReferences iRef = (IndirectReferences)indirects[key] ;
if (iRef != null && !iRef.Copied) {
pageReferences.Add(iRef.Ref);
iRef.SetCopied();
}
pageRef = CurrentPage;
if (iRef == null) {
iRef = new IndirectReferences(pageRef);
indirects[key] = iRef;
}
iRef.SetCopied();
PdfDictionary newPage = CopyDictionary(thePage);
root.AddPage(newPage);
++currentPageNumber;
}
/**
* Copy the acroform for an input document. Note that you can only have one,
* we make no effort to merge them.
* @param reader The reader of the input file that is being copied
* @throws IOException, BadPdfFormatException
*/
public void CopyAcroForm(PdfReader reader) {
SetFromReader(reader);
PdfDictionary catalog = reader.Catalog;
PRIndirectReference hisRef = null;
PdfObject o = catalog.Get(PdfName.ACROFORM);
if (o != null && o.Type == PdfObject.INDIRECT)
hisRef = (PRIndirectReference)o;
if (hisRef == null) return; // bugfix by John Engla
RefKey key = new RefKey(hisRef);
PdfIndirectReference myRef;
IndirectReferences iRef = (IndirectReferences)indirects[key] ;
if (iRef != null) {
acroForm = myRef = iRef.Ref;
}
else {
acroForm = myRef = body.PdfIndirectReference;
iRef = new IndirectReferences(myRef);
indirects[key] = iRef;
}
if (! iRef.Copied) {
iRef.SetCopied();
PdfDictionary theForm = CopyDictionary((PdfDictionary)PdfReader.GetPdfObject(hisRef));
AddToBody(theForm, myRef);
}
}
/*
* the getCatalog method is part of PdfWriter.
* we wrap this so that we can extend it
*/
protected override PdfDictionary GetCatalog(PdfIndirectReference rootObj) {
PdfDictionary theCat = pdf.GetCatalog(rootObj);
if (fieldArray == null) {
if (acroForm != null) theCat.Put(PdfName.ACROFORM, acroForm);
}
else
AddFieldResources(theCat);
WriteOutlines(theCat, false);
return theCat;
}
private void AddFieldResources(PdfDictionary catalog) {
if (fieldArray == null)
return;
PdfDictionary acroForm = new PdfDictionary();
catalog.Put(PdfName.ACROFORM, acroForm);
acroForm.Put(PdfName.FIELDS, fieldArray);
acroForm.Put(PdfName.DA, new PdfString("/Helv 0 Tf 0 g "));
if (fieldTemplates.Count == 0)
return;
PdfDictionary dr = new PdfDictionary();
acroForm.Put(PdfName.DR, dr);
foreach (PdfTemplate template in fieldTemplates.Keys) {
PdfFormField.MergeResources(dr, (PdfDictionary)template.Resources);
}
if (dr.Get(PdfName.ENCODING) == null)
dr.Put(PdfName.ENCODING, PdfName.WIN_ANSI_ENCODING);
PdfDictionary fonts = (PdfDictionary)PdfReader.GetPdfObject(dr.Get(PdfName.FONT));
if (fonts == null) {
fonts = new PdfDictionary();
dr.Put(PdfName.FONT, fonts);
}
if (!fonts.Contains(PdfName.HELV)) {
PdfDictionary dic = new PdfDictionary(PdfName.FONT);
dic.Put(PdfName.BASEFONT, PdfName.HELVETICA);
dic.Put(PdfName.ENCODING, PdfName.WIN_ANSI_ENCODING);
dic.Put(PdfName.NAME, PdfName.HELV);
dic.Put(PdfName.SUBTYPE, PdfName.TYPE1);
fonts.Put(PdfName.HELV, AddToBody(dic).IndirectReference);
}
if (!fonts.Contains(PdfName.ZADB)) {
PdfDictionary dic = new PdfDictionary(PdfName.FONT);
dic.Put(PdfName.BASEFONT, PdfName.ZAPFDINGBATS);
dic.Put(PdfName.NAME, PdfName.ZADB);
dic.Put(PdfName.SUBTYPE, PdfName.TYPE1);
fonts.Put(PdfName.ZADB, AddToBody(dic).IndirectReference);
}
}
/**
* Signals that the <CODE>Document</CODE> was closed and that no other
* <CODE>Elements</CODE> will be added.
* <P>
* The pages-tree is built and written to the outputstream.
* A Catalog is constructed, as well as an Info-object,
* the referencetable is composed and everything is written
* to the outputstream embedded in a Trailer.
*/
public override void Close() {
if (open) {
PdfReaderInstance ri = currentPdfReaderInstance;
pdf.Close();
base.Close();
if (ri != null) {
try {
ri.Reader.Close();
ri.ReaderFile.Close();
}
catch (IOException) {
// empty on purpose
}
}
}
}
public override void AddAnnotation(PdfAnnotation annot) { }
internal override PdfIndirectReference Add(PdfPage page, PdfContents contents) { return null; }
public override void FreeReader(PdfReader reader) {
indirectMap.Remove(reader);
if (currentPdfReaderInstance != null) {
if (currentPdfReaderInstance.Reader == reader) {
try {
currentPdfReaderInstance.Reader.Close();
currentPdfReaderInstance.ReaderFile.Close();
}
catch (IOException) {
// empty on purpose
}
currentPdfReaderInstance = null;
}
}
}
/**
* Create a page stamp. New content and annotations, including new fields, are allowed.
* The fields added cannot have parents in another pages. This method modifies the PdfReader instance.<p>
* The general usage to stamp something in a page is:
* <p>
* <pre>
* PdfImportedPage page = copy.getImportedPage(reader, 1);
* PdfCopy.PageStamp ps = copy.createPageStamp(page);
* ps.addAnnotation(PdfAnnotation.createText(copy, new Rectangle(50, 180, 70, 200), "Hello", "No Thanks", true, "Comment"));
* PdfContentByte under = ps.getUnderContent();
* under.addImage(img);
* PdfContentByte over = ps.getOverContent();
* over.beginText();
* over.setFontAndSize(bf, 18);
* over.setTextMatrix(30, 30);
* over.showText("total page " + totalPage);
* over.endText();
* ps.alterContents();
* copy.addPage(page);
* </pre>
* @param iPage an imported page
* @return the <CODE>PageStamp</CODE>
*/
public PageStamp CreatePageStamp(PdfImportedPage iPage) {
int pageNum = iPage.PageNumber;
PdfReader reader = iPage.PdfReaderInstance.Reader;
PdfDictionary pageN = reader.GetPageN(pageNum);
return new PageStamp(reader, pageN, this);
}
public class PageStamp {
PdfDictionary pageN;
PdfCopy.StampContent under;
PdfCopy.StampContent over;
PageResources pageResources;
PdfReader reader;
PdfCopy cstp;
internal PageStamp(PdfReader reader, PdfDictionary pageN, PdfCopy cstp) {
this.pageN = pageN;
this.reader = reader;
this.cstp = cstp;
}
public PdfContentByte GetUnderContent(){
if (under == null) {
if (pageResources == null) {
pageResources = new PageResources();
PdfDictionary resources = (PdfDictionary)PdfReader.GetPdfObject(pageN.Get(PdfName.RESOURCES));
pageResources.SetOriginalResources(resources, cstp.namePtr);
}
under = new PdfCopy.StampContent(cstp, pageResources);
}
return under;
}
public PdfContentByte GetOverContent(){
if (over == null) {
if (pageResources == null) {
pageResources = new PageResources();
PdfDictionary resources = (PdfDictionary)PdfReader.GetPdfObject(pageN.Get(PdfName.RESOURCES));
pageResources.SetOriginalResources(resources, cstp.namePtr);
}
over = new PdfCopy.StampContent(cstp, pageResources);
}
return over;
}
public void AlterContents() {
if (over == null && under == null)
return;
PdfArray ar = null;
PdfObject content = PdfReader.GetPdfObject(pageN.Get(PdfName.CONTENTS), pageN);
if (content == null) {
ar = new PdfArray();
pageN.Put(PdfName.CONTENTS, ar);
}
else if (content.IsArray()) {
ar = (PdfArray)content;
}
else if (content.IsStream()) {
ar = new PdfArray();
ar.Add(pageN.Get(PdfName.CONTENTS));
pageN.Put(PdfName.CONTENTS, ar);
}
else {
ar = new PdfArray();
pageN.Put(PdfName.CONTENTS, ar);
}
ByteBuffer out_p = new ByteBuffer();
if (under != null) {
out_p.Append(PdfContents.SAVESTATE);
ApplyRotation(pageN, out_p);
out_p.Append(under.InternalBuffer);
out_p.Append(PdfContents.RESTORESTATE);
}
if (over != null)
out_p.Append(PdfContents.SAVESTATE);
PdfStream stream = new PdfStream(out_p.ToByteArray());
stream.FlateCompress();
PdfIndirectReference ref1 = cstp.AddToBody(stream).IndirectReference;
ar.AddFirst(ref1);
out_p.Reset();
if (over != null) {
out_p.Append(' ');
out_p.Append(PdfContents.RESTORESTATE);
out_p.Append(PdfContents.SAVESTATE);
ApplyRotation(pageN, out_p);
out_p.Append(over.InternalBuffer);
out_p.Append(PdfContents.RESTORESTATE);
stream = new PdfStream(out_p.ToByteArray());
stream.FlateCompress();
ar.Add(cstp.AddToBody(stream).IndirectReference);
}
pageN.Put(PdfName.RESOURCES, pageResources.Resources);
}
void ApplyRotation(PdfDictionary pageN, ByteBuffer out_p) {
if (!cstp.rotateContents)
return;
Rectangle page = reader.GetPageSizeWithRotation(pageN);
int rotation = page.Rotation;
switch (rotation) {
case 90:
out_p.Append(PdfContents.ROTATE90);
out_p.Append(page.Top);
out_p.Append(' ').Append('0').Append(PdfContents.ROTATEFINAL);
break;
case 180:
out_p.Append(PdfContents.ROTATE180);
out_p.Append(page.Right);
out_p.Append(' ');
out_p.Append(page.Top);
out_p.Append(PdfContents.ROTATEFINAL);
break;
case 270:
out_p.Append(PdfContents.ROTATE270);
out_p.Append('0').Append(' ');
out_p.Append(page.Right);
out_p.Append(PdfContents.ROTATEFINAL);
break;
}
}
private void AddDocumentField(PdfIndirectReference refi) {
if (cstp.fieldArray == null)
cstp.fieldArray = new PdfArray();
cstp.fieldArray.Add(refi);
}
private void ExpandFields(PdfFormField field, ArrayList allAnnots) {
allAnnots.Add(field);
ArrayList kids = field.Kids;
if (kids != null) {
for (int k = 0; k < kids.Count; ++k)
ExpandFields((PdfFormField)kids[k], allAnnots);
}
}
public void AddAnnotation(PdfAnnotation annot) {
ArrayList allAnnots = new ArrayList();
if (annot.IsForm()) {
PdfFormField field = (PdfFormField)annot;
if (field.Parent != null)
return;
ExpandFields(field, allAnnots);
if (cstp.fieldTemplates == null)
cstp.fieldTemplates = new Hashtable();
}
else
allAnnots.Add(annot);
for (int k = 0; k < allAnnots.Count; ++k) {
annot = (PdfAnnotation)allAnnots[k];
if (annot.IsForm()) {
if (!annot.IsUsed()) {
Hashtable templates = annot.Templates;
if (templates != null) {
foreach (object tpl in templates.Keys) {
cstp.fieldTemplates[tpl] = null;
}
}
}
PdfFormField field = (PdfFormField)annot;
if (field.Parent == null)
AddDocumentField(field.IndirectReference);
}
if (annot.IsAnnotation()) {
PdfObject pdfobj = PdfReader.GetPdfObject(pageN.Get(PdfName.ANNOTS), pageN);
PdfArray annots = null;
if (pdfobj == null || !pdfobj.IsArray()) {
annots = new PdfArray();
pageN.Put(PdfName.ANNOTS, annots);
}
else
annots = (PdfArray)pdfobj;
annots.Add(annot.IndirectReference);
if (!annot.IsUsed()) {
PdfRectangle rect = (PdfRectangle)annot.Get(PdfName.RECT);
if (rect != null && (rect.Left != 0 || rect.Right != 0 || rect.Top != 0 || rect.Bottom != 0)) {
int rotation = reader.GetPageRotation(pageN);
Rectangle pageSize = reader.GetPageSizeWithRotation(pageN);
switch (rotation) {
case 90:
annot.Put(PdfName.RECT, new PdfRectangle(
pageSize.Top - rect.Bottom,
rect.Left,
pageSize.Top - rect.Top,
rect.Right));
break;
case 180:
annot.Put(PdfName.RECT, new PdfRectangle(
pageSize.Right - rect.Left,
pageSize.Top - rect.Bottom,
pageSize.Right - rect.Right,
pageSize.Top - rect.Top));
break;
case 270:
annot.Put(PdfName.RECT, new PdfRectangle(
rect.Bottom,
pageSize.Right - rect.Left,
rect.Top,
pageSize.Right - rect.Right));
break;
}
}
}
}
if (!annot.IsUsed()) {
annot.SetUsed();
cstp.AddToBody(annot, annot.IndirectReference);
}
}
}
}
public class StampContent : PdfContentByte {
PageResources pageResources;
/** Creates a new instance of StampContent */
internal StampContent(PdfWriter writer, PageResources pageResources) : base(writer) {
this.pageResources = pageResources;
}
/**
* Gets a duplicate of this <CODE>PdfContentByte</CODE>. All
* the members are copied by reference but the buffer stays different.
*
* @return a copy of this <CODE>PdfContentByte</CODE>
*/
public override PdfContentByte Duplicate {
get {
return new PdfCopy.StampContent(writer, pageResources);
}
}
internal override PageResources PageResources {
get {
return pageResources;
}
}
}
}
}
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