using System;
using System.Collections.Generic;
using iTextSharp.text;
using iTextSharp.text.pdf;
/*
 * $Id: PdfPageEventForwarder.cs 125 2010-02-21 22:51:06Z psoares33 $
 * 
 *
 * This file is part of the iText project.
 * Copyright (c) 1998-2012 1T3XT BVBA
 * 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 1T3XT,
 * 1T3XT 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,
 * you 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
 */

namespace iTextSharp.text.pdf.events {

    /**
    * If you want to add more than one page eventa to a PdfWriter,
    * you have to construct a PdfPageEventForwarder, add the
    * different events to this object and add the forwarder to
    * the PdfWriter.
    */

    public class PdfPageEventForwarder : IPdfPageEvent {

        /** ArrayList containing all the PageEvents that have to be executed. */
        protected List<IPdfPageEvent> events = new List<IPdfPageEvent>();
        
        /** 
        * Add a page eventa to the forwarder.
        * @param eventa an eventa that has to be added to the forwarder.
        */
        public void AddPageEvent(IPdfPageEvent eventa) {
            events.Add(eventa);
        }
        
        /**
        * Called when the document is opened.
        * 
        * @param writer
        *            the <CODE>PdfWriter</CODE> for this document
        * @param document
        *            the document
        */
        public virtual void OnOpenDocument(PdfWriter writer, Document document) {
            foreach (IPdfPageEvent eventa in events) {
                eventa.OnOpenDocument(writer, document);
            }
        }

        /**
        * Called when a page is initialized.
        * <P>
        * Note that if even if a page is not written this method is still called.
        * It is preferable to use <CODE>onEndPage</CODE> to avoid infinite loops.
        * 
        * @param writer
        *            the <CODE>PdfWriter</CODE> for this document
        * @param document
        *            the document
        */
        public virtual void OnStartPage(PdfWriter writer, Document document) {
            foreach (IPdfPageEvent eventa in events) {
                eventa.OnStartPage(writer, document);
            }
        }

        /**
        * Called when a page is finished, just before being written to the
        * document.
        * 
        * @param writer
        *            the <CODE>PdfWriter</CODE> for this document
        * @param document
        *            the document
        */
        public virtual void OnEndPage(PdfWriter writer, Document document) {
            foreach (IPdfPageEvent eventa in events) {
                eventa.OnEndPage(writer, document);
            }
        }

        /**
        * Called when the document is closed.
        * <P>
        * Note that this method is called with the page number equal to the last
        * page plus one.
        * 
        * @param writer
        *            the <CODE>PdfWriter</CODE> for this document
        * @param document
        *            the document
        */
        public virtual void OnCloseDocument(PdfWriter writer, Document document) {
            foreach (IPdfPageEvent eventa in events) {
                eventa.OnCloseDocument(writer, document);
            }
        }

        /**
        * Called when a Paragraph is written.
        * <P>
        * <CODE>paragraphPosition</CODE> will hold the height at which the
        * paragraph will be written to. This is useful to insert bookmarks with
        * more control.
        * 
        * @param writer
        *            the <CODE>PdfWriter</CODE> for this document
        * @param document
        *            the document
        * @param paragraphPosition
        *            the position the paragraph will be written to
        */
        public virtual void OnParagraph(PdfWriter writer, Document document,
                float paragraphPosition) {
            foreach (IPdfPageEvent eventa in events) {
                eventa.OnParagraph(writer, document, paragraphPosition);
            }
        }

        /**
        * Called when a Paragraph is written.
        * <P>
        * <CODE>paragraphPosition</CODE> will hold the height of the end of the
        * paragraph.
        * 
        * @param writer
        *            the <CODE>PdfWriter</CODE> for this document
        * @param document
        *            the document
        * @param paragraphPosition
        *            the position of the end of the paragraph
        */
        public virtual void OnParagraphEnd(PdfWriter writer, Document document,
                float paragraphPosition) {
            foreach (IPdfPageEvent eventa in events) {
                eventa.OnParagraphEnd(writer, document, paragraphPosition);
            }
        }

        /**
        * Called when a Chapter is written.
        * <P>
        * <CODE>position</CODE> will hold the height at which the chapter will be
        * written to.
        * 
        * @param writer
        *            the <CODE>PdfWriter</CODE> for this document
        * @param document
        *            the document
        * @param paragraphPosition
        *            the position the chapter will be written to
        * @param title
        *            the title of the Chapter
        */
        public virtual void OnChapter(PdfWriter writer, Document document,
                float paragraphPosition, Paragraph title) {
            foreach (IPdfPageEvent eventa in events) {
                eventa.OnChapter(writer, document, paragraphPosition, title);
            }
        }

        /**
        * Called when the end of a Chapter is reached.
        * <P>
        * <CODE>position</CODE> will hold the height of the end of the chapter.
        * 
        * @param writer
        *            the <CODE>PdfWriter</CODE> for this document
        * @param document
        *            the document
        * @param position
        *            the position of the end of the chapter.
        */
        public virtual void OnChapterEnd(PdfWriter writer, Document document, float position) {
            foreach (IPdfPageEvent eventa in events) {
                eventa.OnChapterEnd(writer, document, position);
            }
        }

        /**
        * Called when a Section is written.
        * <P>
        * <CODE>position</CODE> will hold the height at which the section will be
        * written to.
        * 
        * @param writer
        *            the <CODE>PdfWriter</CODE> for this document
        * @param document
        *            the document
        * @param paragraphPosition
        *            the position the section will be written to
        * @param depth
        *            the number depth of the Section
        * @param title
        *            the title of the section
        */
        public virtual void OnSection(PdfWriter writer, Document document,
                float paragraphPosition, int depth, Paragraph title) {
            foreach (IPdfPageEvent eventa in events) {
                eventa.OnSection(writer, document, paragraphPosition, depth, title);
            }
        }

        /**
        * Called when the end of a Section is reached.
        * <P>
        * <CODE>position</CODE> will hold the height of the section end.
        * 
        * @param writer
        *            the <CODE>PdfWriter</CODE> for this document
        * @param document
        *            the document
        * @param position
        *            the position of the end of the section
        */
        public virtual void OnSectionEnd(PdfWriter writer, Document document, float position) {
            foreach (IPdfPageEvent eventa in events) {
                eventa.OnSectionEnd(writer, document, position);
            }
        }

        /**
        * Called when a <CODE>Chunk</CODE> with a generic tag is written.
        * <P>
        * It is usefull to pinpoint the <CODE>Chunk</CODE> location to generate
        * bookmarks, for example.
        * 
        * @param writer
        *            the <CODE>PdfWriter</CODE> for this document
        * @param document
        *            the document
        * @param rect
        *            the <CODE>Rectangle</CODE> containing the <CODE>Chunk
        *            </CODE>
        * @param text
        *            the text of the tag
        */
        public virtual void OnGenericTag(PdfWriter writer, Document document,
                Rectangle rect, String text) {
            foreach (IPdfPageEvent eventa in events) {
                eventa.OnGenericTag(writer, document, rect, text);
            }
        }
    }
}
