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text_output/starter_textflow

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/* $Id: starter_textflow.java,v 1.12 2013/01/15 10:12:08 stm Exp $

 * Textflow starter:

 * Create multi-column text output which may span multiple pages

 *

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

 * Required data: none

 */

package com.pdflib.cookbook.pdflib.text_output;


import com.pdflib.pdflib;

import com.pdflib.PDFlibException;


public class starter_textflow

{

    public static void main (String argv[])

    {

    pdflib p = null;


    String outfile = "starter_textflow.pdf";

    String title = "Starter Textflow";

    int i, tf = -1;

    String result;

    final double llx1= 50, lly1=50, urx1=250, ury1=800;

    final double llx2=300, lly2=50, urx2=500, ury2=800;


    /* Repeat the dummy text to produce more contents */

    final int count = 50;


    final String optlist1 =

        "fontname=Helvetica fontsize=10.5 encoding=unicode " +

        "fillcolor={gray 0} alignment=justify";


    final String optlist2 =

        "fontname=Helvetica-Bold fontsize=14 encoding=unicode " +

        "fillcolor={rgb 1 0 0} charref";


    /* Dummy text for filling the columns. Soft hyphens are marked with the

     * character reference "­" (character references are enabled by the

     * charref option).

     */

    final String text =

        "Lorem ipsum dolor sit amet, consectetur adi­pi­sicing elit, " +

        "sed do eius­mod tempor incidi­dunt ut labore et dolore " +

        "magna ali­qua. Ut enim ad minim ve­niam, quis nostrud " +

        "exer­citation ull­amco la­bo­ris nisi ut " +

        "ali­quip ex ea commodo con­sequat. Duis aute irure dolor " +

        "in repre­henderit in voluptate velit esse cillum dolore eu " +

        "fugiat nulla pari­atur. Excep­teur sint occae­cat " +

        "cupi­datat non proident, sunt in culpa qui officia " +

        "dese­runt mollit anim id est laborum. ";


    try {

        p = new pdflib();


        /* 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: 1.12 $");


        /* Create some amount of dummy text and feed it to a Textflow

         * object with alternating options.

         */

        for (i=1; i<=count; i++)

        {

        String num = i + " ";


        tf = p.add_textflow(tf, num, optlist2);

        if (tf == -1)

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


        tf = p.add_textflow(tf, text, optlist1);

        if (tf == -1)

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

        }


        /* Loop until all of the text is placed; create new pages

         * as long as more text needs to be placed. Two columns will

         * be created on all pages.

         */

        do

        {

            /* Add "showborder" to visualize the fitbox borders */

            String optlist = "verticalalign=justify linespreadlimit=120% ";


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


            /* Fill the first column */

            result = p.fit_textflow(tf, llx1, lly1, urx1, ury1, optlist);


            /* Fill the second column if we have more text*/

            if (!result.equals("_stop"))

                result = p.fit_textflow(tf, llx2, lly2, urx2, ury2,optlist);


            p.end_page_ext("");


            /* "_boxfull" means we must continue because there is more text;

             * "_nextpage" is interpreted as "start new column"

             */

        } while (result.equals("_boxfull") || result.equals("_nextpage"));


        /* Check for errors */

        if (!result.equals("_stop"))

        {

            /* "_boxempty" happens if the box is very small and doesn't

             * hold any text at all.

             */

            if (result.equals( "_boxempty"))

                throw new Exception ("Error: Textflow box too small");

            else

            {

                /* Any other return value is a user exit caused by

                 * the "return" option; this requires dedicated code to

                 * deal with.

                 */

                throw new Exception ("User return '" + result +

                        "' found in Textflow");

            }

        }


        p.delete_textflow(tf);


        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();

            }

        }

    }

}