blocks/starter_block

 * Block starter:

 * Import a PDF page containing blocks, and process all blocks

 *

 * The blocks are retrieved via pCOS, and the block filling functions are used

 * to visualize the blocks on the output page. A real-world application would

 * of course fill the blocks with data retrieved from some external data source.

 *

 * Required software: PPS 7

 * Required data: PDF document

 */

package com.pdflib.cookbook.pdflib.blocks;

import com.pdflib.pdflib;

import com.pdflib.PDFlibException;

public class starter_block

{

    public static void main (String argv[])

    {

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

    String searchpath = "../input";

    String outfile = "starter_block.pdf";

    String title = "Starter Block";

    pdflib p = null;

    double width, height;

    String infile = "boilerplate.pdf";

    int i, page, indoc, blockcount;

    String optlist;

    try {

        p = new pdflib();

        p.set_parameter("SearchPath", searchpath);

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

        p.set_parameter("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: 1.12 $");

        /* Open a PDF containing blocks */

        indoc = p.open_pdi_document(infile, "");

        if (indoc == -1)

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

        /* Open the first page */

        page = p.open_pdi_page(indoc, 1, "");

        if (page == -1)

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

        width = p.pcos_get_number(indoc, "pages[0]/width");

        height = p.pcos_get_number(indoc, "pages[0]/height");

        p.begin_page_ext(width, height, "");

        /* Place the imported page on the output page */

        p.fit_pdi_page(page, 0, 0, "");

        blockcount = (int) p.pcos_get_number(indoc,

            "length:pages[0]/PieceInfo/PDFlib/Private/Blocks");

        if (blockcount == 0)

            throw new Exception("Error: " + infile +

                "does not contain any PDFlib blocks");

        /* Loop over all blocks on the page */

        for (i = 0; i <  blockcount; i++)

        {

        String blockname;

        String blocktype;

        /* Fetch the name and type of the i-th block on the first

         * page (one of Text/Image/PDF)

         */

        blockname = p.pcos_get_string(indoc,

            "pages[0]/PieceInfo/PDFlib/Private/Blocks[" + i + "]/Name");

        blocktype = p.pcos_get_string(indoc,

            "pages[0]/PieceInfo/PDFlib/Private/Blocks[" + i + "]/Subtype");

        /* Visualize all text blocks */

        if (blocktype.equals("Text"))

        {

            optlist = "fontname=Helvetica encoding=unicode " +

                "fillcolor={rgb 1 0 0} bordercolor={gray 0} linewidth=0.25";

            /* We simply use the block name as content */

            if (p.fill_textblock(page, blockname, blockname, optlist) == -1)

                System.err.println("Warning: " + p.get_errmsg());

        }

        }

        p.end_page_ext("");

        p.close_pdi_page(page);

        p.end_document("");

        p.close_pdi_document(indoc);

        } 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();

            }

        }

    }

}