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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.

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/*
 * Copyright 2003 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 com.lowagie.text.Rectangle;

/** An event called for a single cell.
 * @author Paulo Soares ([email protected])
 */
public interface PdfPCellEvent {
    /** This method is called at the end of the cell rendering. The text or graphics are added to
     * one of the 4 PdfContentByte contained in
     * canvases.

     * The indexes to canvases are:
     * 

     * PdfPTable.BASECANVAS - the original PdfContentByte. Anything placed here
     * will be under the cell.
     * 
PdfPTable.BACKGROUNDCANVAS - the layer where the background goes to.
     * 
PdfPTable.LINECANVAS - the layer where the lines go to.
     * 
PdfPTable.TEXTCANVAS - the layer where the text go to. Anything placed here
     * will be over the cell.
     * 
     * The layers are placed in sequence on top of each other.
     * 
     * @param cell the cell
     * @param position the coordinates of the cell
     * @param canvases an array of PdfContentByte
     */    
    public void cellLayout(PdfPCell cell, Rectangle position, PdfContentByte[] canvases);
}