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iText, a free Java-PDF library
/*
* $Id: PdfCopy.java 3594 2008-10-08 10:01:33Z psoares33 $
*
* Copyright (C) 2002 Mark Thompson
*
* 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.
*
* 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/
*/
package com.lowagie.text.pdf;
import java.io.IOException;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Iterator;
import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.ExceptionConverter;
import com.lowagie.text.Rectangle;
import java.util.ArrayList;
/**
* Make copies of PDF documents. Documents can be edited after reading and
* before writing them out.
* @author Mark Thompson
*/
public class PdfCopy extends PdfWriter {
/**
* This class holds information about indirect references, since they are
* renumbered by iText.
*/
static class IndirectReferences {
PdfIndirectReference theRef;
boolean hasCopied;
IndirectReferences(PdfIndirectReference ref) {
theRef = ref;
hasCopied = false;
}
void setCopied() { hasCopied = true; }
boolean getCopied() { return hasCopied; }
PdfIndirectReference getRef() { return theRef; }
};
protected HashMap indirects;
protected HashMap indirectMap;
protected int currentObjectNum = 1;
protected PdfReader reader;
protected PdfIndirectReference acroForm;
protected int[] namePtr = {0};
/** Holds value of property rotateContents. */
private boolean rotateContents = true;
protected PdfArray fieldArray;
protected HashMap fieldTemplates;
/**
* A key to allow us to hash indirect references
*/
protected static class RefKey {
int num;
int gen;
RefKey(int num, int gen) {
this.num = num;
this.gen = gen;
}
RefKey(PdfIndirectReference ref) {
num = ref.getNumber();
gen = ref.getGeneration();
}
RefKey(PRIndirectReference ref) {
num = ref.getNumber();
gen = ref.getGeneration();
}
public int hashCode() {
return (gen<<16)+num;
}
public boolean equals(Object o) {
if (!(o instanceof RefKey)) return false;
RefKey other = (RefKey)o;
return this.gen == other.gen && this.num == other.num;
}
public String toString() {
return Integer.toString(num) + ' ' + gen;
}
}
/**
* Constructor
* @param document
* @param os outputstream
*/
public PdfCopy(Document document, OutputStream os) throws DocumentException {
super(new PdfDocument(), os);
document.addDocListener(pdf);
pdf.addWriter(this);
indirectMap = new HashMap();
}
/** Getter for property rotateContents.
* @return Value of property rotateContents.
*
*/
public boolean isRotateContents() {
return this.rotateContents;
}
/** Setter for property rotateContents.
* @param rotateContents New value of property rotateContents.
*
*/
public void setRotateContents(boolean rotateContents) {
this.rotateContents = 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 PdfImportedPage getImportedPage(PdfReader reader, int pageNumber) {
if (currentPdfReaderInstance != null) {
if (currentPdfReaderInstance.getReader() != reader) {
try {
currentPdfReaderInstance.getReader().close();
currentPdfReaderInstance.getReaderFile().close();
}
catch (IOException ioe) {
// 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 PdfIndirectReference copyIndirect(PRIndirectReference in) throws IOException, BadPdfFormatException {
PdfIndirectReference theRef;
RefKey key = new RefKey(in);
IndirectReferences iRef = (IndirectReferences)indirects.get(key);
if (iRef != null) {
theRef = iRef.getRef();
if (iRef.getCopied()) {
return theRef;
}
}
else {
theRef = body.getPdfIndirectReference();
iRef = new IndirectReferences(theRef);
indirects.put(key, iRef);
}
PdfObject obj = PdfReader.getPdfObjectRelease(in);
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 in)
throws IOException, BadPdfFormatException {
PdfDictionary out = new PdfDictionary();
PdfObject type = PdfReader.getPdfObjectRelease(in.get(PdfName.TYPE));
for (Iterator it = in.getKeys().iterator(); it.hasNext();) {
PdfName key = (PdfName)it.next();
PdfObject value = in.get(key);
// System.out.println("Copy " + key);
if (type != null && PdfName.PAGE.equals(type)) {
if (!key.equals(PdfName.B) && !key.equals(PdfName.PARENT))
out.put(key, copyObject(value));
}
else
out.put(key, copyObject(value));
}
return out;
}
/**
* Translate a PRStream to a PdfStream. The data part copies itself.
*/
protected PdfStream copyStream(PRStream in) throws IOException, BadPdfFormatException {
PRStream out = new PRStream(in, null);
for (Iterator it = in.getKeys().iterator(); it.hasNext();) {
PdfName key = (PdfName) it.next();
PdfObject value = in.get(key);
out.put(key, copyObject(value));
}
return out;
}
/**
* Translate a PRArray to a PdfArray. Also translate all of the objects contained
* in it
*/
protected PdfArray copyArray(PdfArray in) throws IOException, BadPdfFormatException {
PdfArray out = new PdfArray();
for (Iterator i = in.getArrayList().iterator(); i.hasNext();) {
PdfObject value = (PdfObject)i.next();
out.add(copyObject(value));
}
return out;
}
/**
* Translate a PR-object to a Pdf-object
*/
protected PdfObject copyObject(PdfObject in) throws IOException,BadPdfFormatException {
if (in == null)
return PdfNull.PDFNULL;
switch (in.type) {
case PdfObject.DICTIONARY:
// System.out.println("Dictionary: " + in.toString());
return copyDictionary((PdfDictionary)in);
case PdfObject.INDIRECT:
return copyIndirect((PRIndirectReference)in);
case PdfObject.ARRAY:
return copyArray((PdfArray)in);
case PdfObject.NUMBER:
case PdfObject.NAME:
case PdfObject.STRING:
case PdfObject.NULL:
case PdfObject.BOOLEAN:
case 0:
return in;
case PdfObject.STREAM:
return copyStream((PRStream)in);
// return in;
default:
if (in.type < 0) {
String lit = ((PdfLiteral)in).toString();
if (lit.equals("true") || lit.equals("false")) {
return new PdfBoolean(lit);
}
return new PdfLiteral(lit);
}
System.out.println("CANNOT COPY type " + in.type);
return null;
}
}
/**
* convenience method. Given an imported page, set our "globals"
*/
protected int setFromIPage(PdfImportedPage iPage) {
int pageNum = iPage.getPageNumber();
PdfReaderInstance inst = currentPdfReaderInstance = iPage.getPdfReaderInstance();
reader = inst.getReader();
setFromReader(reader);
return pageNum;
}
/**
* convenience method. Given a reader, set our "globals"
*/
protected void setFromReader(PdfReader reader) {
this.reader = reader;
indirects = (HashMap)indirectMap.get(reader);
if (indirects == null) {
indirects = new HashMap();
indirectMap.put(reader,indirects);
PdfDictionary catalog = reader.getCatalog();
PRIndirectReference ref = null;
PdfObject o = catalog.get(PdfName.ACROFORM);
if (o == null || o.type() != PdfObject.INDIRECT)
return;
ref = (PRIndirectReference)o;
if (acroForm == null) acroForm = body.getPdfIndirectReference();
indirects.put(new RefKey(ref), new IndirectReferences(acroForm));
}
}
/**
* Add an imported page to our output
* @param iPage an imported page
* @throws IOException, BadPdfFormatException
*/
public void addPage(PdfImportedPage iPage) throws IOException, BadPdfFormatException {
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.get(key);
if (iRef != null && !iRef.getCopied()) {
pageReferences.add(iRef.getRef());
iRef.setCopied();
}
pageRef = getCurrentPage();
if (iRef == null) {
iRef = new IndirectReferences(pageRef);
indirects.put(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) throws IOException, BadPdfFormatException {
setFromReader(reader);
PdfDictionary catalog = reader.getCatalog();
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 Englar
RefKey key = new RefKey(hisRef);
PdfIndirectReference myRef;
IndirectReferences iRef = (IndirectReferences)indirects.get(key);
if (iRef != null) {
acroForm = myRef = iRef.getRef();
}
else {
acroForm = myRef = body.getPdfIndirectReference();
iRef = new IndirectReferences(myRef);
indirects.put(key, iRef);
}
if (! iRef.getCopied()) {
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 PdfDictionary getCatalog(PdfIndirectReference rootObj) {
try {
PdfDictionary theCat = pdf.getCatalog(rootObj);
if (fieldArray == null) {
if (acroForm != null) theCat.put(PdfName.ACROFORM, acroForm);
}
else
addFieldResources(theCat);
return theCat;
}
catch (IOException e) {
throw new ExceptionConverter(e);
}
}
private void addFieldResources(PdfDictionary catalog) throws IOException {
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.isEmpty())
return;
PdfDictionary dr = new PdfDictionary();
acroForm.put(PdfName.DR, dr);
for (Iterator it = fieldTemplates.keySet().iterator(); it.hasNext();) {
PdfTemplate template = (PdfTemplate)it.next();
PdfFormField.mergeResources(dr, (PdfDictionary)template.getResources());
}
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).getIndirectReference());
}
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).getIndirectReference());
}
}
/**
* Signals that the Document was closed and that no other
* Elements will be added.
*
* The pages-tree is built and written to the outputstream.
* A Catalog is constructed, as well as an Info-object,
* the reference table is composed and everything is written
* to the outputstream embedded in a Trailer.
*/
public void close() {
if (open) {
PdfReaderInstance ri = currentPdfReaderInstance;
pdf.close();
super.close();
if (ri != null) {
try {
ri.getReader().close();
ri.getReaderFile().close();
}
catch (IOException ioe) {
// empty on purpose
}
}
}
}
public PdfIndirectReference add(PdfOutline outline) { return null; }
public void addAnnotation(PdfAnnotation annot) { }
PdfIndirectReference add(PdfPage page, PdfContents contents) throws PdfException { return null; }
public void freeReader(PdfReader reader) throws IOException {
indirectMap.remove(reader);
if (currentPdfReaderInstance != null) {
if (currentPdfReaderInstance.getReader() == reader) {
try {
currentPdfReaderInstance.getReader().close();
currentPdfReaderInstance.getReaderFile().close();
}
catch (IOException ioe) {
// 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.
* The general usage to stamp something in a page is:
*
*
* 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);
*
* @param iPage an imported page
* @return the PageStamp
*/
public PageStamp createPageStamp(PdfImportedPage iPage) {
int pageNum = iPage.getPageNumber();
PdfReader reader = iPage.getPdfReaderInstance().getReader();
PdfDictionary pageN = reader.getPageN(pageNum);
return new PageStamp(reader, pageN, this);
}
public static class PageStamp {
PdfDictionary pageN;
PdfCopy.StampContent under;
PdfCopy.StampContent over;
PageResources pageResources;
PdfReader reader;
PdfCopy cstp;
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() throws IOException {
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 = new ByteBuffer();
if (under != null) {
out.append(PdfContents.SAVESTATE);
applyRotation(pageN, out);
out.append(under.getInternalBuffer());
out.append(PdfContents.RESTORESTATE);
}
if (over != null)
out.append(PdfContents.SAVESTATE);
PdfStream stream = new PdfStream(out.toByteArray());
stream.flateCompress(cstp.getCompressionLevel());
PdfIndirectReference ref1 = cstp.addToBody(stream).getIndirectReference();
ar.addFirst(ref1);
out.reset();
if (over != null) {
out.append(' ');
out.append(PdfContents.RESTORESTATE);
out.append(PdfContents.SAVESTATE);
applyRotation(pageN, out);
out.append(over.getInternalBuffer());
out.append(PdfContents.RESTORESTATE);
stream = new PdfStream(out.toByteArray());
stream.flateCompress(cstp.getCompressionLevel());
ar.add(cstp.addToBody(stream).getIndirectReference());
}
pageN.put(PdfName.RESOURCES, pageResources.getResources());
}
void applyRotation(PdfDictionary pageN, ByteBuffer out) {
if (!cstp.rotateContents)
return;
Rectangle page = reader.getPageSizeWithRotation(pageN);
int rotation = page.getRotation();
switch (rotation) {
case 90:
out.append(PdfContents.ROTATE90);
out.append(page.getTop());
out.append(' ').append('0').append(PdfContents.ROTATEFINAL);
break;
case 180:
out.append(PdfContents.ROTATE180);
out.append(page.getRight());
out.append(' ');
out.append(page.getTop());
out.append(PdfContents.ROTATEFINAL);
break;
case 270:
out.append(PdfContents.ROTATE270);
out.append('0').append(' ');
out.append(page.getRight());
out.append(PdfContents.ROTATEFINAL);
break;
}
}
private void addDocumentField(PdfIndirectReference ref) {
if (cstp.fieldArray == null)
cstp.fieldArray = new PdfArray();
cstp.fieldArray.add(ref);
}
private void expandFields(PdfFormField field, ArrayList allAnnots) {
allAnnots.add(field);
ArrayList kids = field.getKids();
if (kids != null) {
for (int k = 0; k < kids.size(); ++k)
expandFields((PdfFormField)kids.get(k), allAnnots);
}
}
public void addAnnotation(PdfAnnotation annot) {
try {
ArrayList allAnnots = new ArrayList();
if (annot.isForm()) {
PdfFormField field = (PdfFormField)annot;
if (field.getParent() != null)
return;
expandFields(field, allAnnots);
if (cstp.fieldTemplates == null)
cstp.fieldTemplates = new HashMap();
}
else
allAnnots.add(annot);
for (int k = 0; k < allAnnots.size(); ++k) {
annot = (PdfAnnotation)allAnnots.get(k);
if (annot.isForm()) {
if (!annot.isUsed()) {
HashMap templates = annot.getTemplates();
if (templates != null)
cstp.fieldTemplates.putAll(templates);
}
PdfFormField field = (PdfFormField)annot;
if (field.getParent() == null)
addDocumentField(field.getIndirectReference());
}
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.getIndirectReference());
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.getTop() - rect.bottom(),
rect.left(),
pageSize.getTop() - rect.top(),
rect.right()));
break;
case 180:
annot.put(PdfName.RECT, new PdfRectangle(
pageSize.getRight() - rect.left(),
pageSize.getTop() - rect.bottom(),
pageSize.getRight() - rect.right(),
pageSize.getTop() - rect.top()));
break;
case 270:
annot.put(PdfName.RECT, new PdfRectangle(
rect.bottom(),
pageSize.getRight() - rect.left(),
rect.top(),
pageSize.getRight() - rect.right()));
break;
}
}
}
}
if (!annot.isUsed()) {
annot.setUsed();
cstp.addToBody(annot, annot.getIndirectReference());
}
}
}
catch (IOException e) {
throw new ExceptionConverter(e);
}
}
}
public static class StampContent extends PdfContentByte {
PageResources pageResources;
/** Creates a new instance of StampContent */
StampContent(PdfWriter writer, PageResources pageResources) {
super(writer);
this.pageResources = pageResources;
}
/**
* Gets a duplicate of this PdfContentByte. All
* the members are copied by reference but the buffer stays different.
*
* @return a copy of this PdfContentByte
*/
public PdfContentByte getDuplicate() {
return new PdfCopy.StampContent(writer, pageResources);
}
PageResources getPageResources() {
return pageResources;
}
}
}