using System;
using System.Collections;
using iTextSharp.text;
using iTextSharp.text.pdf;

/*
 * 
 * $Id: VerticalPositionMark.cs,v 1.2 2008/05/13 11:25:38 psoares33 Exp $
 *
 * Copyright 2008 by Bruno Lowagie
 *
 * The contents of this file are subject to the Mozilla Public License Version 1.1
 * (the "License"); you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the License.
 *
 * The Original Code is 'iText, a free JAVA-PDF library'.
 *
 * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
 * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
 * All Rights Reserved.
 * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
 * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
 *
 * Contributor(s): all the names of the contributors are added in the source code
 * where applicable.
 *
 * Alternatively, the contents of this file may be used under the terms of the
 * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
 * provisions of LGPL are applicable instead of those above.  If you wish to
 * allow use of your version of this file only under the terms of the LGPL
 * License and not to allow others to use your version of this file under
 * the MPL, indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by the LGPL.
 * If you do not delete the provisions above, a recipient may use your version
 * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the MPL as stated above or 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.
 *
 * 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/
 */

namespace iTextSharp.text.pdf.draw {

    /**
    * Helper class implementing the DrawInterface. Can be used to add
    * horizontal or vertical separators. Won't draw anything unless
    * you implement the draw method.
    * @since   2.1.2
    */

    public class VerticalPositionMark : IDrawInterface, IElement {

        /** Another implementation of the DrawInterface; its draw method will overrule LineSeparator.Draw(). */
        protected IDrawInterface drawInterface = null;

        /** The offset for the line. */
        protected float offset = 0;
        
        /**
        * Creates a vertical position mark that won't draw anything unless
        * you define a DrawInterface.
        */
        public VerticalPositionMark() { 
        }

        /**
        * Creates a vertical position mark that won't draw anything unless
        * you define a DrawInterface.
        * @param   drawInterface   the drawInterface for this vertical position mark.
        * @param   offset          the offset for this vertical position mark.
        */
        public VerticalPositionMark(IDrawInterface drawInterface, float offset) {
            this.drawInterface = drawInterface;
            this.offset = offset;
        }
        
        /**
        * @see com.lowagie.text.pdf.draw.DrawInterface#draw(com.lowagie.text.pdf.PdfContentByte, float, float, float, float, float)
        */
        public virtual void Draw(PdfContentByte canvas, float llx, float lly, float urx, float ury, float y) {
            if (drawInterface != null) {
                drawInterface.Draw(canvas, llx, lly, urx, ury, y + offset);
            }
        }
        
        /**
        * @see com.lowagie.text.Element#process(com.lowagie.text.ElementListener)
        */
        public bool Process(IElementListener listener) {
            try {
                return listener.Add(this);
            } catch (DocumentException) {
                return false;
            }
        }

        /**
        * @see com.lowagie.text.Element#type()
        */
        public int Type {
            get {
                return Element.YMARK;
            }
        }

        /**
        * @see com.lowagie.text.Element#isContent()
        */
        public bool IsContent() {
            return true;
        }

        /**
        * @see com.lowagie.text.Element#isNestable()
        */
        public bool IsNestable() {
            return false;
        }

        /**
        * @see com.lowagie.text.Element#getChunks()
        */
        public ArrayList Chunks {
            get {
                ArrayList list = new ArrayList();
                list.Add(new Chunk(this, true));
                return list;
            }
        }

        /**
        * Setter for the interface with the overruling Draw() method.
        * @param drawInterface a DrawInterface implementation
        */
        public virtual IDrawInterface DrawInterface {
            set {
                drawInterface = value;
            }
            get {
                return drawInterface;
            }
        }

        /**
        * Setter for the offset. The offset is relative to the current
        * Y position. If you want to underline something, you have to
        * choose a negative offset.
        * @param offset    an offset
        */
        public virtual float Offset {
            set {
                offset = value;
            }
            get {
                return offset;
            }
        }
    }
}