fonts/escape_sequences

 * Escape sequences:

 * Use escape sequences in text lines to output octal or hexadecimal values

 *

 * Enable the resolution of escape sequences by setting the "escapesequence"

 * parameter to "true".

 * Output simple text in octal as well as hexadecimal notation using

 * fit_textline().

 *

 * Required software: PDFlib Lite/PDFlib/PDFlib+PDI/PPS 7

 * Required data: none

 */

package com.pdflib.cookbook.pdflib.fonts;

import com.pdflib.pdflib;

import com.pdflib.PDFlibException;

public class escape_sequences

{

public static void main (String argv[])

    {

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

    String searchpath = "../input";

    String outfile = "escape_sequences.pdf";

    String title = "Escape Sequences";

    pdflib p = null;

    int font;

    int x=100, xoff=200, y=650, yoff=35;

    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: 1.10 $");

        /* For PDFlib Lite: change "unicode" to "winansi" */

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

        if (font == -1)

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

        /* Enable escape sequences to be resolved */

        p.set_parameter("escapesequence", "true");

        /* Start page */

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

        /* Set the font and font size */

        p.setfont(font, 18);

        /* Output some descriptive text, i.e. the header for a kind of

         * input/output table

         */

        p.fit_textline("Input", x, y, "underline underlinewidth=1");

        p.fit_textline("Output", x+xoff, y, "underline underlinewidth=1");

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

         * Output some text in octal notation using escape sequences

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

         */

        /* Show the input text.

         * In PDFlib with Java, four backslashes are needed to output just one

         * of them. First, the Java compiler resolves each pair of backslashes

         * to one backslash. Then, these two backslashes are resolved by PDFlib

         * to one backslash, e.g. "\\\\160" will result in the literal string

         * "\160" in the output.

         */

        p.fit_textline("\\\\160", x, y-=yoff, "");

        /* Output the character "p" by supplying it in octal notation

         * using the escape sequence "\\160". Two backslashes are needed since

         * the Java compiler will resolve "\\" to "\". Then, PDFlib will

         * interpret the "\" escape sequence as hexadecimal notation provided

         * that the "escapesequence" parameter has been set to "true" as done

         * above. 

         */

        p.fit_textline("\\160", x+xoff, y, "");

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

         * Output some German umlauts in hexadecimal notation using escape

         * sequences

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

         */

        /* Show the input text (for a description see above) */

        p.fit_textline("\\\\xC4", x, y-=yoff, "");

        /* Output the character "Ä" by supplying it in hexadecimal notation

         * using the escape sequence "\\xC4" (for a description see above). 

         */

        p.fit_textline("\\xC4", x+xoff, y, "");

        /* Show the input text (for a description see above) */

        p.fit_textline("\\\\xD6", x, y-=yoff, "");

        /* Output the character "Ö" by supplying it in hexadecimal notation

         * using the escape sequence "\\xD6" (for a description see above). 

         */

        p.fit_textline("\\xD6", x+xoff, y, "");

        /* Show the input text (for a description see above) */

        p.fit_textline("\\\\xDC", x, y-=yoff, "");

        /* Output the character "Ü" by supplying it in hexadecimal notation

         * using the escape sequence "\\xDC" (for a description see above). 

         */

        p.fit_textline("\\xDC", x+xoff, y, "");

        /* Finish page */

        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();

            }

        }

    }

}