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text_output/current_text_position

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

 * Current text position:

 * Demonstrate how the current text position can be used to output simple text,

 * text lines, or Textflows next to one another.

 *

 * Use set_text_pos() to set the position for text output on the page.

 * Output some simple text using show(). The text position will be implicitly

 * moved at the end of the output text.

 * Use get_option() with "textx" and "texty" to retrieve the current text

 * position.

 * Based on these values output a text line using fit_textline().

 * Output a Textflow at the current text position below the text line.

 * Retrieve the current text position at the end of the Textflow and output a Z

 * line there.

 *

 * 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 current_text_position

{

    public static void main (String argv[])

    {

    pdflib p = null;


    String outfile = "current_text_position.pdf";

    String title = "Current Text Position";

    int i, tf = -1, font, fsize = 12;

    String result;

    final double llx=150, lly=50, urx=330, ury=700;

    double textx, texty;

   


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

    final int count = 3;


    final String optlist1 =

        "fontname=Helvetica fontsize=" + fsize + " 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: 1.4 $");

       

        /* Load font */

        font = p.load_font("Helvetica-Bold", "unicode", "");


        if (font == -1)

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

       

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

       

        p.setfont(font, fsize);

        p.setcolor("fillstroke", "rgb", 1, 0, 0, 0);

       

       

        /* ------------------------------------------------------------------

         * Use simple text output functions for text output. The current text

         * position is moved to the end of the output text.

         * ------------------------------------------------------------------

         */

       

        /* Set the position for text output on the page */

        p.set_text_pos(llx, ury + 50);

       

        /* Output text at the current text position */

        p.show("LORE IPSUM ");

       

        /* Output text at the end of the preceding text */

        p.show("DOLOR SIT AMET,");

       

        /* Retrieve the current text position */

        textx = p.get_option("textx", "");

        texty = p.get_option("texty", "");

       

        /* Output text while setting the current text position to about one

         * line below

         */

        p.show_xy("CONSECTETUR", llx, texty -= (fsize*1.2));

       

        /* -----------------------------------------------------

         * Output a text line based on the current text position

         * -----------------------------------------------------

         */

        p.fit_textline("ADIPISICING ELIT...", llx, (texty -= fsize*1.2), "");

       

       

        /* -----------------------------------------------------------------

         * Output a Textflow and use the current text position at the end of

         * the Textflow to stroke some lines

         * -----------------------------------------------------------------

         */

       

        /* 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());

        }

       

        /* Retrieve the current text position */

        textx = p.get_option("textx", "");

        texty = p.get_option("texty", "");

       

        texty -= 30;


        /* Loop until all of the text is placed. "_boxfull" means we must

         * continue because there is more text

         */

        do {

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

            result = p.fit_textflow(tf, llx, lly, urx, texty, optlist);

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

       

        /* Draw a Z line after the Textflow if the Textflow has been placed

         * correctly

         */

        if (result.equals("_stop")) {

            /* Get the current text position at the end of the Textflow */

            textx = p.get_option("textx", "");

            texty = p.get_option("texty", "");

           

            /* Stroke Z line at the end of the Textflow */

            p.setcolor("stroke", "rgb", 1, 0, 0, 0);

            p.setlinewidth(2);

                     

            texty += 4;

            p.moveto(textx, texty);

            p.lineto(urx, texty);

            p.lineto(llx, lly);

            p.lineto(urx, lly);

            p.stroke();

        }


        /* Check for errors */

        else {

            /* "_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_page_ext("");


        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();

            }

        }

    }

}