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pdfua/tag_out_of_order

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/* $Id: tag_out_of_order.java,v 1.5 2014/01/30 14:05:28 rjs Exp $

 * tag_out_of_order

 *

 * This topic demonstrates how to create Tagged PDF out of order, using

 * the following features:

 * - suspend/resume_page() for adding content to a previous page

 * - query the current structure element id and index with get_option()

 * - the "parent" and "index" tagging options for adding structure elements

 *   at a previous location in the structure tree

 *

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

 * Required data: font

 */

package com.pdflib.cookbook.pdflib.pdfua;


import com.pdflib.pdflib;

import com.pdflib.PDFlibException;


public class tag_out_of_order {

    public static void main(String argv[]) {

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

        String searchpath = "../input";

        String outfile = "tag_out_of_order.pdf";

        String title = "Create Tagged PDF content out of order";


        pdflib p = null;

        int font, x = 50, y1 = 600, y2 = 550;

        int id_parent;

        int index1, index2, index3;

        int exitcode = 0;


        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,

                "pdfua=PDF/UA-1 tag={tagname=Document} lang=en") == -1)

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


            /* Automatically create spaces between chunks of text */

            p.set_option("autospace=true");


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

            p.set_info("Title", title + " $Revision: 1.5 $");


            font = p.load_font("DejaVuSerif", "unicode", "embedding");

            if (font == -1)

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


            p.create_bookmark(title, "");


            // ***************************************************

            // First pass: create partial content on each page.

            // ***************************************************


            id_parent = (int) p.get_option("activeitemid", "");


            // Create page 1

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


            p.setfont(font, 24);


            p.fit_textline("Heading of Chapter 1", x, y1, "tag={tagname=H1}");


            /* Fetch the number of kids of the parent */

            index1 = (int) p.get_option("activeitemkidcount", "");


            // Suspend page 1 to resume it later

            p.suspend_page("");


            // Create page 2

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


            p.setfont(font, 24);

            p.fit_textline("Heading of Chapter 2", x, y1, "tag={tagname=H1}");

            index2 = (int) p.get_option("activeitemkidcount", "");


            // Suspend page 2 to resume it later

            p.suspend_page("");


            // Create page 3

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


            p.setfont(font, 24);

            p.fit_textline("Heading of Chapter 3", x, y1, "tag={tagname=H1}");

            index3 = (int) p.get_option("activeitemkidcount", "");


            // Suspend page 3 to resume it later

            p.suspend_page("");


            // ***************************************************

            // Second pass: add more content to each page.

            // ***************************************************


            // Revisit page 1

            p.resume_page("pagenumber=1");


            // insert more content after the H1 element

            p.fit_textline("Contents of chapter 1...", x, y2, "fontsize=12 "

                + "tag={tagname=P parent=" + id_parent + " index=" + index1

                + "}");


            // Since we inserted an element we must increase subsequent indices

            index2++;

            index3++;


            p.end_page_ext("");


            // Revisit page 2

            p.resume_page("pagenumber=2");


            // insert more content after the H1 element

            p.fit_textline("Contents of chapter 2...", x, y2, "fontsize=12 "

                + "tag={tagname=P parent=" + id_parent + " index=" + index2

                + "}");


            // Since we inserted an element we must increase the subsequent

            // index

            index3++;


            p.end_page_ext("");


            // Revisit page 3

            p.resume_page("pagenumber=3");


            // insert more content after the H1 element

            p.fit_textline("Contents of chapter 3...", x, y2, "fontsize=12 "

                + "tag={tagname=P parent=" + id_parent + " index=" + index3

                + "}");


            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");

            exitcode = 1;

        }

        catch (Exception e) {

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

            exitcode = 1;

        }

        finally {

            if (p != null) {

                p.delete();

            }

            System.exit(exitcode);

        }

    }

}