/*
 * $Id: 0931d7ea9db4cc9ba676821b05ac9bda94a0817e $
 *
 * This file is part of the iText (R) project.
 * Copyright (c) 1998-2015 iText Group NV
 * Authors: Bruno Lowagie, Paulo Soares, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
 * ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
 * OF THIRD PARTY RIGHTS
 *
 * This program 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 Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * a covered work must retain the producer line in every PDF that is created
 * or manipulated using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */
package com.itextpdf.text.pdf;

import java.io.IOException;
import java.io.OutputStream;

/**
 * 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
 */

public 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 = -1;
    
    // constructors
    
/**
 * Constructs a new <CODE>PdfDashPattern</CODE>.
 */
    
    public PdfDashPattern() {
        super();
    }
    
/**
 * Constructs a new <CODE>PdfDashPattern</CODE>.
 */
    
    public PdfDashPattern(float dash) {
        super(new PdfNumber(dash));
        this.dash = dash;
    }
    
/**
 * Constructs a new <CODE>PdfDashPattern</CODE>.
 */
    
    public 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>.
 */
    
    public PdfDashPattern(float dash, float gap, float phase) {
        super(new PdfNumber(dash));
        add(new PdfNumber(gap));
        this.dash = dash;
        this.gap = gap;
        this.phase = phase;
    }
    
    public void add(float n) {
        add(new PdfNumber(n));
    }
    
/**
 * Returns the PDF representation of this <CODE>PdfArray</CODE>.
 */
    
    public void toPdf(PdfWriter writer, OutputStream os) throws IOException {
        os.write('[');

        if (dash >= 0) {
            new PdfNumber(dash).toPdf(writer, os);
            if (gap >= 0) {
                os.write(' ');
                new PdfNumber(gap).toPdf(writer, os);
            }
        }
        os.write(']');
        if (phase >=0) {
            os.write(' ');
            new PdfNumber(phase).toPdf(writer, os);
        }
    }
}