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iText, a free Java-PDF library
/*
* 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.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.Writer;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.StringTokenizer;
import com.lowagie.text.xml.simpleparser.IanaEncodings;
import com.lowagie.text.xml.simpleparser.SimpleXMLDocHandler;
import com.lowagie.text.xml.simpleparser.SimpleXMLParser;
/**
*
* @author Paulo Soares ([email protected])
*/
public class SimpleNamedDestination implements SimpleXMLDocHandler {
private HashMap xmlNames;
private HashMap xmlLast;
private SimpleNamedDestination() {
}
public static HashMap getNamedDestination(PdfReader reader, boolean fromNames) {
IntHashtable pages = new IntHashtable();
int numPages = reader.getNumberOfPages();
for (int k = 1; k <= numPages; ++k)
pages.put(reader.getPageOrigRef(k).getNumber(), k);
HashMap names = fromNames ? reader.getNamedDestinationFromNames() : reader.getNamedDestinationFromStrings();
for (Iterator it = names.entrySet().iterator(); it.hasNext();) {
Map.Entry entry = (Map.Entry)it.next();
ArrayList arr = ((PdfArray)entry.getValue()).getArrayList();
StringBuffer s = new StringBuffer();
try {
s.append(pages.get(((PdfIndirectReference)arr.get(0)).getNumber()));
s.append(' ').append(arr.get(1).toString().substring(1));
for (int k = 2; k < arr.size(); ++k)
s.append(' ').append(arr.get(k).toString());
entry.setValue(s.toString());
}
catch (Exception e) {
it.remove();
}
}
return names;
}
/**
* Exports the destinations to XML. The DTD for this XML is:
*
*
* <?xml version='1.0' encoding='UTF-8'?>
* <!ELEMENT Name (#PCDATA)>
* <!ATTLIST Name
* Page CDATA #IMPLIED
* >
* <!ELEMENT Destination (Name)*>
*
* @param names the names
* @param out the export destination. The stream is not closed
* @param encoding the encoding according to IANA conventions
* @param onlyASCII codes above 127 will always be escaped with &#nn; if true,
* whatever the encoding
* @throws IOException on error
*/
public static void exportToXML(HashMap names, OutputStream out, String encoding, boolean onlyASCII) throws IOException {
String jenc = IanaEncodings.getJavaEncoding(encoding);
Writer wrt = new BufferedWriter(new OutputStreamWriter(out, jenc));
exportToXML(names, wrt, encoding, onlyASCII);
}
/**
* Exports the destinations to XML.
* @param names the names
* @param wrt the export destination. The writer is not closed
* @param encoding the encoding according to IANA conventions
* @param onlyASCII codes above 127 will always be escaped with &#nn; if true,
* whatever the encoding
* @throws IOException on error
*/
public static void exportToXML(HashMap names, Writer wrt, String encoding, boolean onlyASCII) throws IOException {
wrt.write("\n\n");
for (Iterator it = names.entrySet().iterator(); it.hasNext();) {
Map.Entry entry = (Map.Entry)it.next();
String key = (String)entry.getKey();
String value = (String)entry.getValue();
wrt.write(" ");
wrt.write(SimpleXMLParser.escapeXML(escapeBinaryString(key), onlyASCII));
wrt.write(" \n");
}
wrt.write(" \n");
wrt.flush();
}
/**
* Import the names from XML.
* @param in the XML source. The stream is not closed
* @throws IOException on error
* @return the names
*/
public static HashMap importFromXML(InputStream in) throws IOException {
SimpleNamedDestination names = new SimpleNamedDestination();
SimpleXMLParser.parse(names, in);
return names.xmlNames;
}
/**
* Import the names from XML.
* @param in the XML source. The reader is not closed
* @throws IOException on error
* @return the names
*/
public static HashMap importFromXML(Reader in) throws IOException {
SimpleNamedDestination names = new SimpleNamedDestination();
SimpleXMLParser.parse(names, in);
return names.xmlNames;
}
static PdfArray createDestinationArray(String value, PdfWriter writer) {
PdfArray ar = new PdfArray();
StringTokenizer tk = new StringTokenizer(value);
int n = Integer.parseInt(tk.nextToken());
ar.add(writer.getPageReference(n));
if (!tk.hasMoreTokens()) {
ar.add(PdfName.XYZ);
ar.add(new float[]{0, 10000, 0});
}
else {
String fn = tk.nextToken();
if (fn.startsWith("/"))
fn = fn.substring(1);
ar.add(new PdfName(fn));
for (int k = 0; k < 4 && tk.hasMoreTokens(); ++k) {
fn = tk.nextToken();
if (fn.equals("null"))
ar.add(PdfNull.PDFNULL);
else
ar.add(new PdfNumber(fn));
}
}
return ar;
}
public static PdfDictionary outputNamedDestinationAsNames(HashMap names, PdfWriter writer) {
PdfDictionary dic = new PdfDictionary();
for (Iterator it = names.entrySet().iterator(); it.hasNext();) {
Map.Entry entry = (Map.Entry)it.next();
try {
String key = (String)entry.getKey();
String value = (String)entry.getValue();
PdfArray ar = createDestinationArray(value, writer);
PdfName kn = new PdfName(key);
dic.put(kn, ar);
}
catch (Exception e) {
// empty on purpose
}
}
return dic;
}
public static PdfDictionary outputNamedDestinationAsStrings(HashMap names, PdfWriter writer) throws IOException {
HashMap n2 = new HashMap(names);
for (Iterator it = n2.entrySet().iterator(); it.hasNext();) {
Map.Entry entry = (Map.Entry)it.next();
try {
String value = (String)entry.getValue();
PdfArray ar = createDestinationArray(value, writer);
entry.setValue(writer.addToBody(ar).getIndirectReference());
}
catch (Exception e) {
it.remove();
}
}
return PdfNameTree.writeTree(n2, writer);
}
public static String escapeBinaryString(String s) {
StringBuffer buf = new StringBuffer();
char cc[] = s.toCharArray();
int len = cc.length;
for (int k = 0; k < len; ++k) {
char c = cc[k];
if (c < ' ') {
buf.append('\\');
String octal = "00" + Integer.toOctalString((int)c);
buf.append(octal.substring(octal.length() - 3));
}
else if (c == '\\')
buf.append("\\\\");
else
buf.append(c);
}
return buf.toString();
}
public static String unEscapeBinaryString(String s) {
StringBuffer buf = new StringBuffer();
char cc[] = s.toCharArray();
int len = cc.length;
for (int k = 0; k < len; ++k) {
char c = cc[k];
if (c == '\\') {
if (++k >= len) {
buf.append('\\');
break;
}
c = cc[k];
if (c >= '0' && c <= '7') {
int n = c - '0';
++k;
for (int j = 0; j < 2 && k < len; ++j) {
c = cc[k];
if (c >= '0' && c <= '7') {
++k;
n = n * 8 + c - '0';
}
else {
break;
}
}
--k;
buf.append((char)n);
}
else
buf.append(c);
}
else
buf.append(c);
}
return buf.toString();
}
public void endDocument() {
}
public void endElement(String tag) {
if (tag.equals("Destination")) {
if (xmlLast == null && xmlNames != null)
return;
else
throw new RuntimeException("Destination end tag out of place.");
}
if (!tag.equals("Name"))
throw new RuntimeException("Invalid end tag - " + tag);
if (xmlLast == null || xmlNames == null)
throw new RuntimeException("Name end tag out of place.");
if (!xmlLast.containsKey("Page"))
throw new RuntimeException("Page attribute missing.");
xmlNames.put(unEscapeBinaryString((String)xmlLast.get("Name")), xmlLast.get("Page"));
xmlLast = null;
}
public void startDocument() {
}
public void startElement(String tag, HashMap h) {
if (xmlNames == null) {
if (tag.equals("Destination")) {
xmlNames = new HashMap();
return;
}
else
throw new RuntimeException("Root element is not Destination.");
}
if (!tag.equals("Name"))
throw new RuntimeException("Tag " + tag + " not allowed.");
if (xmlLast != null)
throw new RuntimeException("Nested tags are not allowed.");
xmlLast = new HashMap(h);
xmlLast.put("Name", "");
}
public void text(String str) {
if (xmlLast == null)
return;
String name = (String)xmlLast.get("Name");
name += str;
xmlLast.put("Name", name);
}
}