| /* |
| * $Id$ |
| * Copyright (C) 2001 The Apache Software Foundation. All rights reserved. |
| * For details on use and redistribution please refer to the |
| * LICENSE file included with these sources. |
| */ |
| |
| package org.apache.fop.pdf; |
| |
| // Java |
| import java.io.PrintWriter; |
| import java.io.UnsupportedEncodingException; |
| import java.util.Vector; |
| // Fop |
| import org.apache.fop.messaging.MessageHandler; |
| |
| /** |
| * class representing a /Pages object. |
| * |
| * A /Pages object is an ordered collection of pages (/Page objects) |
| * (Actually, /Pages can contain further /Pages as well but this |
| * implementation doesn't allow this) |
| */ |
| public class PDFPages extends PDFObject { |
| |
| /** |
| * the /Page objects |
| */ |
| protected Vector kids = new Vector(); |
| |
| /** |
| * the number of /Page objects |
| */ |
| protected int count = 0; |
| |
| // private PDFPages parent; |
| |
| /** |
| * create a /Pages object. NOTE: The PDFPages |
| * object must be created before the PDF document is |
| * generated, but it is not written to the stream immediately. |
| * It must aslo be allocated an object ID (so that the kids |
| * can refer to the parent) so that the XRef table needs to |
| * be updated before this object is written. |
| * |
| * @param number the object's number |
| */ |
| public PDFPages(int number) { |
| super(number); |
| } |
| |
| /** |
| * add a /Page object. |
| * |
| * @param page the PDFPage to add. |
| */ |
| public void addPage(PDFPage page) { |
| this.kids.addElement(page.referencePDF()); |
| page.setParent(this); |
| this.incrementCount(); |
| } |
| |
| /** |
| * get the count of /Page objects |
| * |
| * @return the number of pages |
| */ |
| public int getCount() { |
| return this.count; |
| } |
| |
| /** |
| * increment the count of /Page objects |
| */ |
| public void incrementCount() { |
| this.count++; |
| // MessageHandler.logln("Incrementing count to " + this.getCount()); |
| } |
| |
| /** |
| * represent the object in PDF |
| * |
| * @return the PDF string |
| */ |
| public byte[] toPDF() { |
| StringBuffer p = new StringBuffer(this.number + " " + this.generation |
| + " obj\n<< /Type /Pages\n/Count " |
| + this.getCount() + "\n/Kids ["); |
| for (int i = 0; i < kids.size(); i++) { |
| p = p.append(kids.elementAt(i) + " "); |
| } |
| p = p.append("] >>\nendobj\n"); |
| |
| try { |
| return p.toString().getBytes(PDFDocument.ENCODING); |
| } catch (UnsupportedEncodingException ue) { |
| return p.toString().getBytes(); |
| } |
| } |
| |
| } |