/*
*
* This file is part of the iText (R) project.
Copyright (c) 1998-2017 iText Group NV
* Authors: Balder Van Camp, Emiel Ackermann, 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.tool.xml.html;
import java.util.List;
import com.itextpdf.text.Element;
import com.itextpdf.tool.xml.Tag;
import com.itextpdf.tool.xml.WorkerContext;
/**
* @author redlab_b
*
*/
public interface TagProcessor {
/**
* This method is called when a tag has been encountered.
* @param ctx the WorkerContext
* @param tag the tag encountered
*
* @return Element an Element to add to the current content;
*/
List<Element> startElement(WorkerContext ctx, Tag tag);
/**
* This method is called if there is text content encountered between the
* opening and closing tags this TagProcessor is mapped to.
* @param ctx the WorkerContext
* @param tag the tag encountered
* @param content the text content between the tags this TagProcessor is
* mapped to.
*
* @return the element to add to the currentContent list
*/
List<Element> content(WorkerContext ctx, Tag tag, String content);
/**
* This method is called when a closing tag has been encountered of the
* TagProcessor implementation that is mapped to the tag.
* @param ctx the WorkerContext
* @param tag the tag encountered
* @param currentContent a list of content possibly created by TagProcessing
* of inner tags, and by <code>startElement</code> and
* <code>content</code> methods of this <code>TagProcessor</code>
* .
*
* @return the resulting element to add to the document or a content stack.
*/
List<Element> endElement(WorkerContext ctx, Tag tag, List<Element> currentContent);
/**
* @return true if the tag implementation must keep it's own currentContent
* stack.
*/
boolean isStackOwner();
}