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blocks/linked_textblocks

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/* $Id: linked_textblocks.java,v 1.5 2013/01/15 10:11:56 stm Exp $

 * Linked text blocks:

 * Link multiple Textflow blocks

 *

 * Import a PDF page representing an advertisement template containing multiple

 * blocks for one product offer each. Several product offers represented in a

 * Textflow are filled into the appropriate number of blocks depending on the

 * length of the Textflow.

 *

 * Required software: PPS 9

 * Required data: PDF document containing blocks

 */

package com.pdflib.cookbook.pdflib.blocks;


import com.pdflib.pdflib;

import com.pdflib.PDFlibException;


public class linked_textblocks

{

    public static void main (String argv[])

    {

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

    String searchpath = "../input";

    String outfile = "linked_textblocks.pdf";

    String title = "Linked Text Blocks";


    pdflib p = null;

    double width, height;

    String infile = "advertisement_blocks.pdf";

    int tf, i, inpage, indoc;

    String optlist;

   

    /* Number of Textflow blocks which can be filled */

    final int nblocks = 6;

   

    /* Name prefix of the blocks contained on the imported page */

    final String blockname = "model_";

   

    final String models =

        "Our paper planes are the ideal way of passing the time. We offer " +

        "revolutionary new developments of the traditional common paper " +

        "planes. If your lesson, conference, or lecture turn out to be " +

        "deadly boring, you can have a wonderful time with our planes. All " +

        "our models are folded from one paper sheet. They are exclusively " +

        "folded without using any adhesive. Several models are equipped with " +

        "a folded landing gear enabling a safe landing on the intended " +

        "location provided that you have aimed well. Other models are able " +

        "to fly loops or cover long distances. Let them start from a vista " +

        "point in the mountains and see where they touch the ground. Have a " +

        "look at our new paper plane models! With our Long Distance Glider " +

        "you can send all your messages even when sitting in a hall or in " +

        "the cinema pretty near the back. Try our Giant Wing, an " +

        "unbelievable sailplane! It is amazingly robust and can even do " +

        "aerobatics. ";

 

    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: 1.5 $");


        /* 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 */

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

        if (inpage == -1)

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

       

        /* Get the width and height of the imported page */

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

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

       

        /* Start the output page with the size given by the imported page */

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


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

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

       

        /* Fill one or more blocks with the Textflow */

        String text = models;

       

        tf = -1;

         

        for (i = 1; i <= nblocks; i++)

        {

            /* Option list for text blocks; the font and encoding should be

             * defined and the Textflow handle supplied. In addition we slightly

             * rotate the block rectangles by 3 degrees. Other options have

             * already been set in the properties of the blocks contained in

             * the input document, such as:

             * "fitmethod=clip" to clip the text when it doesn't fit completely

             * into the block while avoiding any text shrinking.

             * "margin=4" to set some space between the text and the borders of

             * the block rectangle.

             * "fontsize=16" for a font size of 16.

             * "backgroundcolor={gray 0.9}" to colorize the block rectangle with

             * a light gray.

             */

            optlist =

                "fontname=Helvetica encoding=unicode rotate=3 "+

                "textflowhandle=" + tf;

           

            tf = p.fill_textblock(inpage, blockname+i, text, optlist);

               

            text = null;

               

            if (tf == -1) {

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

                break;

            }

               

            /* Check result of most recent call to fit_textflow() */

            int reason = (int) p.info_textflow(tf, "returnreason");

            String result = p.get_string(reason, "");

               

            /* End loop if all text was placed */

            if (result.equals("_stop"))

            {

                p.delete_textflow(tf);

                break;

            }

        }


        p.end_page_ext("");

           

        p.close_pdi_page(inpage);


        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();

            }

        }

    }

}