/*
*
* This file is part of the iText (R) project.
Copyright (c) 1998-2017 iText Group NV
* Authors: Bruno Lowagie, Paulo Soares, et al.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
* ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
* OF THIRD PARTY RIGHTS
*
* This program 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 Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public License
* along with this program; if not, see http://www.gnu.org/licenses or write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA, 02110-1301 USA, or download the license from the following URL:
* http://itextpdf.com/terms-of-use/
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License.
*
* In accordance with Section 7(b) of the GNU Affero General Public License,
* a covered work must retain the producer line in every PDF that is created
* or manipulated using iText.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the iText software without
* disclosing the source code of your own applications.
* These activities include: offering paid services to customers as an ASP,
* serving PDFs on the fly in a web application, shipping iText with a closed
* source product.
*
* For more information, please contact iText Software Corp. at this
* address: sales@itextpdf.com
*/
package com.itextpdf.text.pdf;
import java.io.IOException;
import java.io.PrintStream;
import java.util.Iterator;
/**
* List a PDF file in human-readable form (for debugging reasons mostly)
* @author Mark Thompson
*/
public class PdfLister {
/** the printStream you want to write the output to. */
PrintStream out;
/**
* Create a new lister object.
* @param out
*/
public PdfLister(PrintStream out) {
this.out = out;
}
/**
* Visualizes a PDF object.
* @param object a com.itextpdf.text.pdf object
*/
public void listAnyObject(PdfObject object)
{
switch (object.type()) {
case PdfObject.ARRAY:
listArray((PdfArray)object);
break;
case PdfObject.DICTIONARY:
listDict((PdfDictionary) object);
break;
case PdfObject.STRING:
out.println("(" + object.toString() + ")");
break;
default:
out.println(object.toString());
break;
}
}
/**
* Visualizes a PdfDictionary object.
* @param dictionary a com.itextpdf.text.pdf.PdfDictionary object
*/
public void listDict(PdfDictionary dictionary)
{
out.println("<<");
PdfObject value;
for (PdfName key: dictionary.getKeys()) {
value = dictionary.get(key);
out.print(key.toString());
out.print(' ');
listAnyObject(value);
}
out.println(">>");
}
/**
* Visualizes a PdfArray object.
* @param array a com.itextpdf.text.pdf.PdfArray object
*/
public void listArray(PdfArray array)
{
out.println('[');
for (Iterator<PdfObject> i = array.listIterator(); i.hasNext(); ) {
PdfObject item = i.next();
listAnyObject(item);
}
out.println(']');
}
/**
* Visualizes a Stream.
* @param stream
* @param reader
*/
public void listStream(PRStream stream, PdfReaderInstance reader)
{
try {
listDict(stream);
out.println("startstream");
byte[] b = PdfReader.getStreamBytes(stream);
// byte buf[] = new byte[Math.min(stream.getLength(), 4096)];
// int r = 0;
// stream.openStream(reader);
// for (;;) {
// r = stream.readStream(buf, 0, buf.length);
// if (r == 0) break;
// out.write(buf, 0, r);
// }
// stream.closeStream();
int len = b.length - 1;
for (int k = 0; k < len; ++k) {
if (b[k] == '\r' && b[k + 1] != '\n')
b[k] = (byte)'\n';
}
out.println(new String(b));
out.println("endstream");
} catch (IOException e) {
System.err.println("I/O exception: " + e);
// } catch (java.util.zip.DataFormatException e) {
// System.err.println("Data Format Exception: " + e);
}
}
/**
* Visualizes an imported page
* @param iPage
*/
public void listPage(PdfImportedPage iPage)
{
int pageNum = iPage.getPageNumber();
PdfReaderInstance readerInst = iPage.getPdfReaderInstance();
PdfReader reader = readerInst.getReader();
PdfDictionary page = reader.getPageN(pageNum);
listDict(page);
PdfObject obj = PdfReader.getPdfObject(page.get(PdfName.CONTENTS));
if (obj == null)
return;
switch (obj.type) {
case PdfObject.STREAM:
listStream((PRStream)obj, readerInst);
break;
case PdfObject.ARRAY:
for (Iterator<PdfObject> i = ((PdfArray)obj).listIterator(); i.hasNext();) {
PdfObject o = PdfReader.getPdfObject(i.next());
listStream((PRStream)o, readerInst);
out.println("-----------");
}
break;
}
}
}