pdfdashpattern.java

java itext java itext java itext

/*
 * $Id: PdfDashPattern.java,v 1.11 2001/12/10 13:53:21 blowagie Exp $
 * $Name:  $
 *
 * Copyright 1999, 2000, 2001 by Bruno Lowagie.
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Library General Public License as published
 * by the Free Software Foundation; either version 2 of the License, or any
 * later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
 * details.
 *
 * You should have received a copy of the GNU Library General Public License along
 * with this library; if not, write to the Free Foundation, Inc., 59 Temple Place,
 * Suite 330, Boston, MA 02111-1307 USA.
 *
 * If you didn't download this code from the following link, you should check if
 * you aren't using an obsolete version:
 * http://www.lowagie.com/iText/
 *
 * ir-arch Bruno Lowagie,
 * Adolf Baeyensstraat 121
 * 9040 Sint-Amandsberg
 * BELGIUM
 * tel. [phone]
 * [e-mail]
 *
 */

package com.lowagie.text.pdf;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import com.lowagie.text.DocWriter;

/**
 * A <CODE>PdfDashPattern</CODE> defines a dash pattern as described in
 * the PDF Reference Manual version 1.3 p 325 (section 8.4.3).
 *
 * @see		PdfArray
 */

class PdfDashPattern extends PdfArray {
    
    // membervariables
    
/** This is the length of a dash. */
    private float dash = -1;
    
/** This is the length of a gap. */
    private float gap = -1;
    
/** This is the phase. */
    private float phase;
    
    // constructors
    
/**
 * Constructs a new <CODE>PdfDashPattern</CODE>.
 */
    
    PdfDashPattern() {
        super();
    }
    
/**
 * Constructs a new <CODE>PdfDashPattern</CODE>.
 */
    
    PdfDashPattern(float dash) {
        super(new PdfNumber(dash));
        this.dash = dash;
    }
    
/**
 * Constructs a new <CODE>PdfDashPattern</CODE>.
 */
    
    PdfDashPattern(float dash, float gap) {
        super(new PdfNumber(dash));
        add(new PdfNumber(gap));
        this.dash = dash;
        this.gap = gap;
    }
    
/**
 * Constructs a new <CODE>PdfDashPattern</CODE>.
 */
    
    PdfDashPattern(float dash, float gap, float phase) {
        super(new PdfNumber(dash));
        add(new PdfNumber(gap));
        this.dash = dash;
        this.gap = gap;
        this.phase = phase;
    }
    
/**
 * Returns the PDF representation of this <CODE>PdfArray</CODE>.
 *
 * @return		an array of <CODE>byte</CODE>s
 */
    
    final public byte[] toPdf(PdfEncryption crypto) {
        try {
            ByteArrayOutputStream stream = new ByteArrayOutputStream();
            stream.write(DocWriter.getISOBytes("["));
            
            if (dash >= 0) {
                stream.write(new PdfNumber(dash).toPdf(null));
                if (gap >= 0) {
                    stream.write(DocWriter.getISOBytes(" "));
                    stream.write(new PdfNumber(gap).toPdf(null));
                }
            }
            stream.write(DocWriter.getISOBytes("]"));
            if (phase >=0) {
                stream.write(DocWriter.getISOBytes(" "));
                stream.write(new PdfNumber(phase).toPdf(null));
            }
            
            return stream.toByteArray();
        }
        catch(IOException ioe) {
            throw new RuntimeException(ioe.getMessage());
        }
    }
}