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text_output/drop_caps

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/* $Id: drop_caps.java,v 1.4 2013/01/15 10:12:08 stm Exp $

 * Drop caps:

 * Create an initial drop cap at the beginning of some text

 *

 * Set the initial character of a Textflow in larger type and drop it down

 * a bit into the text.

 * Place the initial character which covers several lines of text at a certain

 * text position within a Textflow. The "matchbox" and "matchbox end" inline

 * options indicate the rectangle of the character's fitbox. The "textrise"

 * option with an appropriate negative value will drop the character some lines

 * down. The "createwrapbox" option indicates that the matchbox will be inserted

 * as wrap box for further text to wrap around.

 *

 * 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 drop_caps

{

    public static void main (String argv[])

    {

    pdflib p = null;

    String searchpath = "../input";

    String outfile = "drop_caps.pdf";

    String title = "Drop Caps";

   

    int tf = -1;

    String result, text, optlist = "";

       

    final double llx = 100, lly = 50, urx = 450, ury = 800;

    final int t_fontsize = 16;      // font size of the text

    final int t_leading = 20;       // leading of the text

    final int c_num = 3;            // no. of lines for the drop cap to cover

   

    int c_textrise = -((c_num - 1) * t_leading); // text rise of the drop cap

    double c_fontsize = -(c_textrise * 1.8);     // font size of the drop cap


    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: 1.4 $");

       

        /* Option list for the output of the initial drop character defining

         * the two macros "cap_start" and "cap_end" for starting and ending the

         * drop cap.

         * The "matchbox" and "matchbox end" inline options indicate the

         * rectangle of the character's fitbox. The "textrise" option with an

         * appropriate negative value will drop the character some lines down.

         * The "createwrapbox" option indicates that the matchbox will be

         * inserted as wrap box for further text to wrap around.

         */

        optlist = "fontname=Helvetica encoding=unicode alignment=justify " +

            "charref " +

            "macro " +

            "{cap_start {fontsize=" + c_fontsize + " leading=" + t_leading +

            "            textrise=" + c_textrise +

            " matchbox={createwrapbox boxheight={leading textrise}}} " +

            "cap_end {matchbox=end fontsize=" + t_fontsize + " textrise=0}}";

         

        /* Text to be placed on the page. Soft hyphens are marked with the

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

         * "charref" option).

         */

        text =

            "<&cap_start>O<&cap_end>ur Paper Planes are the ideal way of " +

            "passing the time. We offer revolutionary " +

            "new develop&shy;ments of the traditional com&shy;mon " +

            "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 fol&shy;ded from one paper " +

            "sheet. They are exclu&shy;sively folded with&shy;out using any " +

            "adhesive. Several models are equipped with a folded landing " +

            "gear enabling a safe landing on the intended loca&shy;tion " +

            "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. ";

       

 

        /* Create the Textflow using the optlist defined above */

        tf = p.create_textflow(text, optlist);

        if (tf == -1)

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

       

        do

        {

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

     

        /* Fit the Textflow. It will wrap around the matchbox defined for the

         * initial drop cap.

         */

        result = p.fit_textflow(tf, llx, lly, urx, ury, "");

   

        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();

            }

        }

    }

}