001/*
002 * $Id: HTMLWorker.java 4666 2011-01-29 12:53:09Z blowagie $
003 *
004 * This file is part of the iText (R) project.
005 * Copyright (c) 1998-2011 1T3XT BVBA
006 * Authors: Bruno Lowagie, Paulo Soares, et al.
007 *
008 * This program is free software; you can redistribute it and/or modify
009 * it under the terms of the GNU Affero General Public License version 3
010 * as published by the Free Software Foundation with the addition of the
011 * following permission added to Section 15 as permitted in Section 7(a):
012 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
013 * 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
014 *
015 * This program is distributed in the hope that it will be useful, but
016 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
017 * or FITNESS FOR A PARTICULAR PURPOSE.
018 * See the GNU Affero General Public License for more details.
019 * You should have received a copy of the GNU Affero General Public License
020 * along with this program; if not, see http://www.gnu.org/licenses or write to
021 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
022 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
023 * http://itextpdf.com/terms-of-use/
024 *
025 * The interactive user interfaces in modified source and object code versions
026 * of this program must display Appropriate Legal Notices, as required under
027 * Section 5 of the GNU Affero General Public License.
028 *
029 * In accordance with Section 7(b) of the GNU Affero General Public License,
030 * a covered work must retain the producer line in every PDF that is created
031 * or manipulated using iText.
032 *
033 * You can be released from the requirements of the license by purchasing
034 * a commercial license. Buying such a license is mandatory as soon as you
035 * develop commercial activities involving the iText software without
036 * disclosing the source code of your own applications.
037 * These activities include: offering paid services to customers as an ASP,
038 * serving PDFs on the fly in a web application, shipping iText with a closed
039 * source product.
040 *
041 * For more information, please contact iText Software Corp. at this
042 * address: sales@itextpdf.com
043 */
044package com.itextpdf.text.html.simpleparser;
045
046import java.io.IOException;
047import java.util.Map;
048
049import com.itextpdf.text.DocumentException;
050
051/**
052 * Interface that needs to be implemented by every tag that is supported by HTMLWorker.
053 * @since 5.0.6
054 */
055public interface HTMLTagProcessor {
056        
057        /**
058         * Implement this class to tell the HTMLWorker what to do
059         * when an open tag is encountered.
060         * @param worker        the HTMLWorker
061         * @param tag           the tag that was encountered
062         * @param attrs         the current attributes of the tag
063         * @throws DocumentException
064         * @throws IOException
065         */
066        public abstract void startElement(HTMLWorker worker, String tag, Map<String, String> attrs) throws DocumentException, IOException;
067        
068        /**
069         * Implement this class to tell the HTMLWorker what to do
070         * when an close tag is encountered.
071         * @param worker        the HTMLWorker
072         * @param tag           the tag that was encountered
073         * @throws DocumentException
074         */
075        public abstract void endElement(HTMLWorker worker, String tag) throws DocumentException;
076}