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iText, a free Java-PDF library
/*
* $Id: PdfCopyFieldsImp.java 2869 2007-07-10 15:20:20Z psoares33 $
* $Name$
* Copyright 2004 by Paulo Soares.
*
* 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.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.StringTokenizer;
import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.ExceptionConverter;
/**
*
* @author psoares
*/
class PdfCopyFieldsImp extends PdfWriter {
private static final PdfName iTextTag = new PdfName("_iTextTag_");
private static final Integer zero = new Integer(0);
ArrayList readers = new ArrayList();
HashMap readers2intrefs = new HashMap();
HashMap pages2intrefs = new HashMap();
HashMap visited = new HashMap();
ArrayList fields = new ArrayList();
RandomAccessFileOrArray file;
HashMap fieldTree = new HashMap();
ArrayList pageRefs = new ArrayList();
ArrayList pageDics = new ArrayList();
PdfDictionary resources = new PdfDictionary();
PdfDictionary form;
boolean closing = false;
Document nd;
private HashMap tabOrder;
private ArrayList calculationOrder = new ArrayList();
private ArrayList calculationOrderRefs;
PdfCopyFieldsImp(OutputStream os) throws DocumentException {
this(os, '\0');
}
PdfCopyFieldsImp(OutputStream os, char pdfVersion) throws DocumentException {
super(new PdfDocument(), os);
pdf.addWriter(this);
if (pdfVersion != 0)
super.setPdfVersion(pdfVersion);
nd = new Document();
nd.addDocListener(pdf);
}
void addDocument(PdfReader reader, List pagesToKeep) throws DocumentException {
if (!readers2intrefs.containsKey(reader) && reader.isTampered())
throw new DocumentException("The document was reused.");
reader = new PdfReader(reader);
reader.selectPages(pagesToKeep);
if (reader.getNumberOfPages() == 0)
return;
reader.setTampered(false);
addDocument(reader);
}
void addDocument(PdfReader reader) throws DocumentException {
if (!reader.isOpenedWithFullPermissions())
throw new IllegalArgumentException("PdfReader not opened with owner password");
openDoc();
if (readers2intrefs.containsKey(reader)) {
reader = new PdfReader(reader);
}
else {
if (reader.isTampered())
throw new DocumentException("The document was reused.");
reader.consolidateNamedDestinations();
reader.setTampered(true);
}
reader.shuffleSubsetNames();
readers2intrefs.put(reader, new IntHashtable());
readers.add(reader);
int len = reader.getNumberOfPages();
IntHashtable refs = new IntHashtable();
for (int p = 1; p <= len; ++p) {
refs.put(reader.getPageOrigRef(p).getNumber(), 1);
reader.releasePage(p);
}
pages2intrefs.put(reader, refs);
visited.put(reader, new IntHashtable());
fields.add(reader.getAcroFields());
updateCalculationOrder(reader);
}
private static String getCOName(PdfReader reader, PRIndirectReference ref) {
String name = "";
while (ref != null) {
PdfObject obj = PdfReader.getPdfObject(ref);
if (obj == null || obj.type() != PdfObject.DICTIONARY)
break;
PdfDictionary dic = (PdfDictionary)obj;
PdfString t = (PdfString)PdfReader.getPdfObject(dic.get(PdfName.T));
if (t != null) {
name = t.toUnicodeString()+ "." + name;
}
ref = (PRIndirectReference)dic.get(PdfName.PARENT);
}
if (name.endsWith("."))
name = name.substring(0, name.length() - 1);
return name;
}
private void updateCalculationOrder(PdfReader reader) {
PdfDictionary catalog = reader.getCatalog();
PdfDictionary acro = (PdfDictionary)PdfReader.getPdfObject(catalog.get(PdfName.ACROFORM));
if (acro == null)
return;
PdfArray co = (PdfArray)PdfReader.getPdfObject(acro.get(PdfName.CO));
if (co == null || co.size() == 0)
return;
AcroFields af = reader.getAcroFields();
ArrayList coa = co.getArrayList();
for (int k = 0; k < coa.size(); ++k) {
PdfObject obj = (PdfObject)coa.get(k);
if (obj == null || !obj.isIndirect())
continue;
String name = getCOName(reader, (PRIndirectReference)obj);
if (af.getFieldItem(name) == null)
continue;
name = "." + name;
if (calculationOrder.contains(name))
continue;
calculationOrder.add(name);
}
}
void propagate(PdfObject obj, PdfIndirectReference refo, boolean restricted) throws IOException {
if (obj == null)
return;
// if (refo != null)
// addToBody(obj, refo);
if (obj instanceof PdfIndirectReference)
return;
switch (obj.type()) {
case PdfObject.DICTIONARY:
case PdfObject.STREAM: {
PdfDictionary dic = (PdfDictionary)obj;
for (Iterator it = dic.getKeys().iterator(); it.hasNext();) {
PdfName key = (PdfName)it.next();
if (restricted && (key.equals(PdfName.PARENT) || key.equals(PdfName.KIDS)))
continue;
PdfObject ob = dic.get(key);
if (ob != null && ob.isIndirect()) {
PRIndirectReference ind = (PRIndirectReference)ob;
if (!setVisited(ind) && !isPage(ind)) {
PdfIndirectReference ref = getNewReference(ind);
propagate(PdfReader.getPdfObjectRelease(ind), ref, restricted);
}
}
else
propagate(ob, null, restricted);
}
break;
}
case PdfObject.ARRAY: {
ArrayList list = ((PdfArray)obj).getArrayList();
//PdfArray arr = new PdfArray();
for (Iterator it = list.iterator(); it.hasNext();) {
PdfObject ob = (PdfObject)it.next();
if (ob != null && ob.isIndirect()) {
PRIndirectReference ind = (PRIndirectReference)ob;
if (!isVisited(ind) && !isPage(ind)) {
PdfIndirectReference ref = getNewReference(ind);
propagate(PdfReader.getPdfObjectRelease(ind), ref, restricted);
}
}
else
propagate(ob, null, restricted);
}
break;
}
case PdfObject.INDIRECT: {
throw new RuntimeException("Reference pointing to reference.");
}
}
}
private void adjustTabOrder(PdfArray annots, PdfIndirectReference ind, PdfNumber nn) {
int v = nn.intValue();
ArrayList t = (ArrayList)tabOrder.get(annots);
if (t == null) {
t = new ArrayList();
int size = annots.size() - 1;
for (int k = 0; k < size; ++k) {
t.add(zero);
}
t.add(new Integer(v));
tabOrder.put(annots, t);
annots.add(ind);
}
else {
int size = t.size() - 1;
for (int k = size; k >= 0; --k) {
if (((Integer)t.get(k)).intValue() <= v) {
t.add(k + 1, new Integer(v));
annots.getArrayList().add(k + 1, ind);
size = -2;
break;
}
}
if (size != -2) {
t.add(0, new Integer(v));
annots.getArrayList().add(0, ind);
}
}
}
protected PdfArray branchForm(HashMap level, PdfIndirectReference parent, String fname) throws IOException {
PdfArray arr = new PdfArray();
for (Iterator it = level.entrySet().iterator(); it.hasNext();) {
Map.Entry entry = (Map.Entry) it.next();
String name = (String) entry.getKey();
Object obj = entry.getValue();
PdfIndirectReference ind = getPdfIndirectReference();
PdfDictionary dic = new PdfDictionary();
if (parent != null)
dic.put(PdfName.PARENT, parent);
dic.put(PdfName.T, new PdfString(name, PdfObject.TEXT_UNICODE));
String fname2 = fname + "." + name;
int coidx = calculationOrder.indexOf(fname2);
if (coidx >= 0)
calculationOrderRefs.set(coidx, ind);
if (obj instanceof HashMap) {
dic.put(PdfName.KIDS, branchForm((HashMap)obj, ind, fname2));
arr.add(ind);
addToBody(dic, ind);
}
else {
ArrayList list = (ArrayList)obj;
dic.mergeDifferent((PdfDictionary)list.get(0));
if (list.size() == 3) {
dic.mergeDifferent((PdfDictionary)list.get(2));
int page = ((Integer)list.get(1)).intValue();
PdfDictionary pageDic = (PdfDictionary)pageDics.get(page - 1);
PdfArray annots = (PdfArray)PdfReader.getPdfObject(pageDic.get(PdfName.ANNOTS));
if (annots == null) {
annots = new PdfArray();
pageDic.put(PdfName.ANNOTS, annots);
}
PdfNumber nn = (PdfNumber)dic.get(iTextTag);
dic.remove(iTextTag);
adjustTabOrder(annots, ind, nn);
}
else {
PdfArray kids = new PdfArray();
for (int k = 1; k < list.size(); k += 2) {
int page = ((Integer)list.get(k)).intValue();
PdfDictionary pageDic = (PdfDictionary)pageDics.get(page - 1);
PdfArray annots = (PdfArray)PdfReader.getPdfObject(pageDic.get(PdfName.ANNOTS));
if (annots == null) {
annots = new PdfArray();
pageDic.put(PdfName.ANNOTS, annots);
}
PdfDictionary widget = new PdfDictionary();
widget.merge((PdfDictionary)list.get(k + 1));
widget.put(PdfName.PARENT, ind);
PdfNumber nn = (PdfNumber)widget.get(iTextTag);
widget.remove(iTextTag);
PdfIndirectReference wref = addToBody(widget).getIndirectReference();
adjustTabOrder(annots, wref, nn);
kids.add(wref);
propagate(widget, null, false);
}
dic.put(PdfName.KIDS, kids);
}
arr.add(ind);
addToBody(dic, ind);
propagate(dic, null, false);
}
}
return arr;
}
protected void createAcroForms() throws IOException {
if (fieldTree.isEmpty())
return;
form = new PdfDictionary();
form.put(PdfName.DR, resources);
propagate(resources, null, false);
form.put(PdfName.DA, new PdfString("/Helv 0 Tf 0 g "));
tabOrder = new HashMap();
calculationOrderRefs = new ArrayList(calculationOrder);
form.put(PdfName.FIELDS, branchForm(fieldTree, null, ""));
PdfArray co = new PdfArray();
for (int k = 0; k < calculationOrderRefs.size(); ++k) {
Object obj = calculationOrderRefs.get(k);
if (obj instanceof PdfIndirectReference)
co.add((PdfIndirectReference)obj);
}
if (co.size() > 0)
form.put(PdfName.CO, co);
}
public void close() {
if (closing) {
super.close();
return;
}
closing = true;
try {
closeIt();
}
catch (Exception e) {
throw new ExceptionConverter(e);
}
}
protected void closeIt() throws IOException {
for (int k = 0; k < readers.size(); ++k) {
((PdfReader)readers.get(k)).removeFields();
}
for (int r = 0; r < readers.size(); ++r) {
PdfReader reader = (PdfReader)readers.get(r);
for (int page = 1; page <= reader.getNumberOfPages(); ++page) {
pageRefs.add(getNewReference(reader.getPageOrigRef(page)));
pageDics.add(reader.getPageN(page));
}
}
mergeFields();
createAcroForms();
for (int r = 0; r < readers.size(); ++r) {
PdfReader reader = (PdfReader)readers.get(r);
for (int page = 1; page <= reader.getNumberOfPages(); ++page) {
PdfDictionary dic = reader.getPageN(page);
PdfIndirectReference pageRef = getNewReference(reader.getPageOrigRef(page));
PdfIndirectReference parent = root.addPageRef(pageRef);
dic.put(PdfName.PARENT, parent);
propagate(dic, pageRef, false);
}
}
for (Iterator it = readers2intrefs.entrySet().iterator(); it.hasNext();) {
Map.Entry entry = (Map.Entry) it.next();
PdfReader reader = (PdfReader) entry.getKey();
try {
file = reader.getSafeFile();
file.reOpen();
IntHashtable t = (IntHashtable) entry.getValue();
int keys[] = t.toOrderedKeys();
for (int k = 0; k < keys.length; ++k) {
PRIndirectReference ref = new PRIndirectReference(reader, keys[k]);
addToBody(PdfReader.getPdfObjectRelease(ref), t.get(keys[k]));
}
}
finally {
try {
file.close();
reader.close();
}
catch (Exception e) {
// empty on purpose
}
}
}
pdf.close();
}
void addPageOffsetToField(HashMap fd, int pageOffset) {
if (pageOffset == 0)
return;
for (Iterator it = fd.values().iterator(); it.hasNext();) {
ArrayList page = ((AcroFields.Item)it.next()).page;
for (int k = 0; k < page.size(); ++k)
page.set(k, new Integer(((Integer)page.get(k)).intValue() + pageOffset));
}
}
void createWidgets(ArrayList list, AcroFields.Item item) {
for (int k = 0; k < item.merged.size(); ++k) {
list.add(item.page.get(k));
PdfDictionary merged = (PdfDictionary)item.merged.get(k);
PdfObject dr = merged.get(PdfName.DR);
if (dr != null)
PdfFormField.mergeResources(resources, (PdfDictionary)PdfReader.getPdfObject(dr));
PdfDictionary widget = new PdfDictionary();
for (Iterator it = merged.getKeys().iterator(); it.hasNext();) {
PdfName key = (PdfName)it.next();
if (widgetKeys.containsKey(key))
widget.put(key, merged.get(key));
}
widget.put(iTextTag, new PdfNumber(((Integer)item.tabOrder.get(k)).intValue() + 1));
list.add(widget);
}
}
void mergeField(String name, AcroFields.Item item) {
HashMap map = fieldTree;
StringTokenizer tk = new StringTokenizer(name, ".");
if (!tk.hasMoreTokens())
return;
while (true) {
String s = tk.nextToken();
Object obj = map.get(s);
if (tk.hasMoreTokens()) {
if (obj == null) {
obj = new HashMap();
map.put(s, obj);
map = (HashMap)obj;
continue;
}
else if (obj instanceof HashMap)
map = (HashMap)obj;
else
return;
}
else {
if (obj instanceof HashMap)
return;
PdfDictionary merged = (PdfDictionary)item.merged.get(0);
if (obj == null) {
PdfDictionary field = new PdfDictionary();
for (Iterator it = merged.getKeys().iterator(); it.hasNext();) {
PdfName key = (PdfName)it.next();
if (fieldKeys.containsKey(key))
field.put(key, merged.get(key));
}
ArrayList list = new ArrayList();
list.add(field);
createWidgets(list, item);
map.put(s, list);
}
else {
ArrayList list = (ArrayList)obj;
PdfDictionary field = (PdfDictionary)list.get(0);
PdfName type1 = (PdfName)field.get(PdfName.FT);
PdfName type2 = (PdfName)merged.get(PdfName.FT);
if (type1 == null || !type1.equals(type2))
return;
int flag1 = 0;
PdfObject f1 = field.get(PdfName.FF);
if (f1 != null && f1.isNumber())
flag1 = ((PdfNumber)f1).intValue();
int flag2 = 0;
PdfObject f2 = merged.get(PdfName.FF);
if (f2 != null && f2.isNumber())
flag2 = ((PdfNumber)f2).intValue();
if (type1.equals(PdfName.BTN)) {
if (((flag1 ^ flag2) & PdfFormField.FF_PUSHBUTTON) != 0)
return;
if ((flag1 & PdfFormField.FF_PUSHBUTTON) == 0 && ((flag1 ^ flag2) & PdfFormField.FF_RADIO) != 0)
return;
}
else if (type1.equals(PdfName.CH)) {
if (((flag1 ^ flag2) & PdfFormField.FF_COMBO) != 0)
return;
}
createWidgets(list, item);
}
return;
}
}
}
void mergeWithMaster(HashMap fd) {
for (Iterator it = fd.entrySet().iterator(); it.hasNext();) {
Map.Entry entry = (Map.Entry) it.next();
String name = (String) entry.getKey();
mergeField(name, (AcroFields.Item) entry.getValue());
}
}
void mergeFields() {
int pageOffset = 0;
for (int k = 0; k < fields.size(); ++k) {
HashMap fd = ((AcroFields)fields.get(k)).getFields();
addPageOffsetToField(fd, pageOffset);
mergeWithMaster(fd);
pageOffset += ((PdfReader)readers.get(k)).getNumberOfPages();
}
}
public PdfIndirectReference getPageReference(int page) {
return (PdfIndirectReference)pageRefs.get(page - 1);
}
protected PdfDictionary getCatalog(PdfIndirectReference rootObj) {
try {
PdfDictionary cat = pdf.getCatalog(rootObj);
if (form != null) {
PdfIndirectReference ref = addToBody(form).getIndirectReference();
cat.put(PdfName.ACROFORM, ref);
}
writeOutlines(cat, false);
return cat;
}
catch (IOException e) {
throw new ExceptionConverter(e);
}
}
protected PdfIndirectReference getNewReference(PRIndirectReference ref) {
return new PdfIndirectReference(0, getNewObjectNumber(ref.getReader(), ref.getNumber(), 0));
}
protected int getNewObjectNumber(PdfReader reader, int number, int generation) {
IntHashtable refs = (IntHashtable)readers2intrefs.get(reader);
int n = refs.get(number);
if (n == 0) {
n = getIndirectReferenceNumber();
refs.put(number, n);
}
return n;
}
protected boolean isVisited(PdfReader reader, int number, int generation) {
IntHashtable refs = (IntHashtable)readers2intrefs.get(reader);
return refs.containsKey(number);
}
protected boolean isVisited(PRIndirectReference ref) {
IntHashtable refs = (IntHashtable)visited.get(ref.getReader());
return refs.containsKey(ref.getNumber());
}
protected boolean setVisited(PRIndirectReference ref) {
IntHashtable refs = (IntHashtable)visited.get(ref.getReader());
return (refs.put(ref.getNumber(), 1) != 0);
}
protected boolean isPage(PRIndirectReference ref) {
IntHashtable refs = (IntHashtable)pages2intrefs.get(ref.getReader());
return refs.containsKey(ref.getNumber());
}
RandomAccessFileOrArray getReaderFile(PdfReader reader) {
return file;
}
public void openDoc() {
if (!nd.isOpen())
nd.open();
}
protected static final HashMap widgetKeys = new HashMap();
protected static final HashMap fieldKeys = new HashMap();
static {
Integer one = new Integer(1);
widgetKeys.put(PdfName.SUBTYPE, one);
widgetKeys.put(PdfName.CONTENTS, one);
widgetKeys.put(PdfName.RECT, one);
widgetKeys.put(PdfName.NM, one);
widgetKeys.put(PdfName.M, one);
widgetKeys.put(PdfName.F, one);
widgetKeys.put(PdfName.BS, one);
widgetKeys.put(PdfName.BORDER, one);
widgetKeys.put(PdfName.AP, one);
widgetKeys.put(PdfName.AS, one);
widgetKeys.put(PdfName.C, one);
widgetKeys.put(PdfName.A, one);
widgetKeys.put(PdfName.STRUCTPARENT, one);
widgetKeys.put(PdfName.OC, one);
widgetKeys.put(PdfName.H, one);
widgetKeys.put(PdfName.MK, one);
widgetKeys.put(PdfName.DA, one);
widgetKeys.put(PdfName.Q, one);
fieldKeys.put(PdfName.AA, one);
fieldKeys.put(PdfName.FT, one);
fieldKeys.put(PdfName.TU, one);
fieldKeys.put(PdfName.TM, one);
fieldKeys.put(PdfName.FF, one);
fieldKeys.put(PdfName.V, one);
fieldKeys.put(PdfName.DV, one);
fieldKeys.put(PdfName.DS, one);
fieldKeys.put(PdfName.RV, one);
fieldKeys.put(PdfName.OPT, one);
fieldKeys.put(PdfName.MAXLEN, one);
fieldKeys.put(PdfName.TI, one);
fieldKeys.put(PdfName.I, one);
fieldKeys.put(PdfName.LOCK, one);
fieldKeys.put(PdfName.SV, one);
}
}