com.lowagie.text.pdf.PRAcroForm Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of itext2 Show documentation
Show all versions of itext2 Show documentation
Itext is a java library to create and manipulate PDFs.
This is a fork of version 2.1.7 the last MPL/LGPL version.
It's focused basically on mantain compatibility with newer bouncycastle releases and small bugfixes.
/*
* $Id: PRAcroForm.java 3735 2009-02-26 01:44:03Z xlv $
*
* Copyright 2001, 2002 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.
*
* This class written by Mark Thompson, Copyright (C) 2002 by 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/
*/
package com.lowagie.text.pdf;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
/**
* This class captures an AcroForm on input. Basically, it extends Dictionary
* by indexing the fields of an AcroForm
* @author Mark Thompson
*/
public class PRAcroForm extends PdfDictionary {
/**
* This class holds the information for a single field
*/
public static class FieldInformation {
String name;
PdfDictionary info;
PRIndirectReference ref;
FieldInformation(String name, PdfDictionary info, PRIndirectReference ref) {
this.name = name; this.info = info; this.ref = ref;
}
public String getName() { return name; }
public PdfDictionary getInfo() { return info; }
public PRIndirectReference getRef() { return ref; }
};
ArrayList fields;
ArrayList stack;
HashMap fieldByName;
PdfReader reader;
/**
* Constructor
* @param reader reader of the input file
*/
public PRAcroForm(PdfReader reader) {
this.reader = reader;
fields = new ArrayList();
fieldByName = new HashMap();
stack = new ArrayList();
}
/**
* Number of fields found
* @return size
*/
public int size() {
return fields.size();
}
public ArrayList getFields() {
return fields;
}
public FieldInformation getField(String name) {
return (FieldInformation)fieldByName.get(name);
}
/**
* Given the title (/T) of a reference, return the associated reference
* @param name a string containing the path
* @return a reference to the field, or null
*/
public PRIndirectReference getRefByName(String name) {
FieldInformation fi = (FieldInformation)fieldByName.get(name);
if (fi == null) return null;
return fi.getRef();
}
/**
* Read, and comprehend the acroform
* @param root the document root
*/
public void readAcroForm(PdfDictionary root) {
if (root == null)
return;
hashMap = root.hashMap;
pushAttrib(root);
PdfArray fieldlist = (PdfArray)PdfReader.getPdfObjectRelease(root.get(PdfName.FIELDS));
iterateFields(fieldlist, null, null);
}
/**
* After reading, we index all of the fields. Recursive.
* @param fieldlist An array of fields
* @param fieldDict the last field dictionary we encountered (recursively)
* @param title the pathname of the field, up to this point or null
*/
protected void iterateFields(PdfArray fieldlist, PRIndirectReference fieldDict, String title) {
for (Iterator it = fieldlist.listIterator(); it.hasNext();) {
PRIndirectReference ref = (PRIndirectReference)it.next();
PdfDictionary dict = (PdfDictionary) PdfReader.getPdfObjectRelease(ref);
// if we are not a field dictionary, pass our parent's values
PRIndirectReference myFieldDict = fieldDict;
String myTitle = title;
PdfString tField = (PdfString)dict.get(PdfName.T);
boolean isFieldDict = tField != null;
if (isFieldDict) {
myFieldDict = ref;
if (title == null) myTitle = tField.toString();
else myTitle = title + '.' + tField.toString();
}
PdfArray kids = (PdfArray)dict.get(PdfName.KIDS);
if (kids != null) {
pushAttrib(dict);
ArrayList elements = new ArrayList(kids.getArrayList());
Iterator kidIter = elements.iterator();
while(kidIter.hasNext()) {
PdfIndirectReference kidRef = (PdfIndirectReference) kidIter.next();
if (ref.getNumber() == kidRef.getNumber()) {
kidIter.remove();
}
}
iterateFields(new PdfArray(elements), myFieldDict, myTitle);
stack.remove(stack.size() - 1); // pop
}
else { // leaf node
if (myFieldDict != null) {
PdfDictionary mergedDict = (PdfDictionary)stack.get(stack.size() - 1);
if (isFieldDict)
mergedDict = mergeAttrib(mergedDict, dict);
mergedDict.put(PdfName.T, new PdfString(myTitle));
FieldInformation fi = new FieldInformation(myTitle, mergedDict, myFieldDict);
fields.add(fi);
fieldByName.put(myTitle, fi);
}
}
}
}
/**
* merge field attributes from two dictionaries
* @param parent one dictionary
* @param child the other dictionary
* @return a merged dictionary
*/
protected PdfDictionary mergeAttrib(PdfDictionary parent, PdfDictionary child) {
PdfDictionary targ = new PdfDictionary();
if (parent != null) targ.putAll(parent);
for (Iterator it = child.getKeys().iterator(); it.hasNext();) {
PdfName key = (PdfName) it.next();
if (key.equals(PdfName.DR) || key.equals(PdfName.DA) ||
key.equals(PdfName.Q) || key.equals(PdfName.FF) ||
key.equals(PdfName.DV) || key.equals(PdfName.V)
|| key.equals(PdfName.FT)
|| key.equals(PdfName.F)) {
targ.put(key,child.get(key));
}
}
return targ;
}
/**
* stack a level of dictionary. Merge in a dictionary from this level
*/
protected void pushAttrib(PdfDictionary dict) {
PdfDictionary dic = null;
if (!stack.isEmpty()) {
dic = (PdfDictionary)stack.get(stack.size() - 1);
}
dic = mergeAttrib(dic, dict);
stack.add(dic);
}
}