itextpdf.jar is a component in iText 5 Java library to provide core functionalities. iText Java library allows you to generate and manage PDF documents.

The Source Code files are provided at iText GitHub site.

You can compile it to generate your JAR file, using pom.xml as the build configuration file.

The source code of itextpdf-5.5.14.jar is provided below:

⏎ com/itextpdf/text/DocListener.java

/*
 *
 * This file is part of the iText (R) project.
    Copyright (c) 1998-2020 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;

/**
 * A class that implements <CODE>DocListener</CODE> will perform some
 * actions when some actions are performed on a <CODE>Document</CODE>.
 *
 * @see		ElementListener
 * @see		Document
 * @see		DocWriter
 */

public interface DocListener extends ElementListener {
    
    // methods
    
	/**
	 * Signals that the <CODE>Document</CODE> has been opened and that
	 * <CODE>Elements</CODE> can be added.
	 */
    
    public void open(); // [L1]
    
    /**
     * Signals that the <CODE>Document</CODE> was closed and that no other
     * <CODE>Elements</CODE> will be added.
     * <P>
     * The outputstream of every writer implementing <CODE>DocListener</CODE> will be closed.
     */
        
    public void close(); // [L2] 
    
    /**
     * Signals that an new page has to be started.
     *
     * @return	<CODE>true</CODE> if the page was added, <CODE>false</CODE> if not.
     */
        
    public boolean newPage(); // [L3]
    
    /**
     * Sets the pagesize.
     *
     * @param	pageSize	the new pagesize
     * @return	a <CODE>boolean</CODE>
     */
        
    public boolean setPageSize(Rectangle pageSize); // [L4]
        
    /**
     * Sets the margins.
     *
     * @param	marginLeft		the margin on the left
     * @param	marginRight		the margin on the right
     * @param	marginTop		the margin on the top
     * @param	marginBottom	the margin on the bottom
     * @return	a <CODE>boolean</CODE>
     */
        
    public boolean setMargins(float marginLeft, float marginRight, float marginTop, float marginBottom);  // [L5]
        
    /**
     * Parameter that allows you to do left/right  margin mirroring (odd/even pages)
     * @param marginMirroring
     * @return true if successful
     */
    public boolean setMarginMirroring(boolean marginMirroring); // [L6]
    
    /**
     * Parameter that allows you to do top/bottom margin mirroring (odd/even pages)
     * @param marginMirroringTopBottom
     * @return true if successful
     * @since	2.1.6
     */
    public boolean setMarginMirroringTopBottom(boolean marginMirroringTopBottom); // [L6]
        
    /**
     * Sets the page number.
     *
     * @param	pageN		the new page number
     */
        
    public void setPageCount(int pageN); // [L7]
    
    /**
     * Sets the page number to 0.
     */
        
    public void resetPageCount(); // [L8]

}

⏎ com/itextpdf/text/DocListener.java

Or download all of them as a single archive file:

File name: itextpdf-5.5.14-fyi.zip
File size: 2163839 bytes
Release date: 2009-10-09
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⇒ iText-2.1.6.jar - iText, a JAVA-PDF library

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