/* $Id: starter_block.java,v 1.12 2007/11/29 11:46:19 katja Exp $
 * 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();
            }
        }
    }
}