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pagination/reverse_page_order

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/* $Id: reverse_page_order.java,v 1.7 2013/01/15 10:12:01 stm Exp $

 * Reverse page order:

 * Create pages in reverse page order

 *

 * Create page no. 5 first, then page no. 4, etc.

 *

 * Required software: PDFlib/PDFlib+PDI/PPS 9

 * Required data: PDF document

 */

package com.pdflib.cookbook.pdflib.pagination;


import com.pdflib.pdflib;

import com.pdflib.PDFlibException;


public class reverse_page_order

{

    public static void main (String argv[])

    {

    /* This is where the data files are. Adjust as necessary. */

    String searchpath = "../input";

    String outfile = "reverse_page_order.pdf";

    String title = "Reverse Page Order";


    pdflib p = null;

    int lastpage = 5, pageno, font, step = 1;


    try {

        p = new pdflib();


        p.set_option("searchpath={" + searchpath + "}");


        /* This means we must check return values of load_font() etc. */

        p.set_option("errorpolicy=return");


        if (p.begin_document(outfile, "") == -1)

            throw new Exception("Error: " + p.get_errmsg());


        p.set_info("Creator", "PDFlib Cookbook");

        p.set_info("Title", title + " $Revision: 1.7 $");


        font = p.load_font("Helvetica-Bold", "unicode", "");


        if (font == -1)

        throw new Exception("Error: " + p.get_errmsg());


        /* Loop over all subsequent pages in reverse order */

        for (pageno = lastpage, step = 1; pageno > 0; pageno--, step++)

        {

            if (pageno == lastpage)

                /* Create the first page */

                p.begin_page_ext(0, 0, "width=a4.width height=a4.height");

            else

                /* Insert subsequent pages before what is (currently) the

                 * first page */

                p.begin_page_ext(0, 0,

                    "width=a4.width height=a4.height pagenumber=1");


            /* Place a text line indicating the page number */

            p.setfont(font, 24);

            p.fit_textline("Page " + pageno + " created in step " + step,

                100, 500, "");


            p.end_page_ext("");

        }


        p.end_document("");


        } catch (PDFlibException e) {

            System.err.print("PDFlib exception occurred:\n");

            System.err.print("[" + e.get_errnum() + "] " + e.get_apiname() +

                ": " + e.get_errmsg() + "\n");

        } catch (Exception e) {

            System.err.println(e.getMessage());

        } finally {

            if (p != null) {

                p.delete();

            }

        }

    }

}