001/* 
002    Licensed to the Apache Software Foundation (ASF) under one
003    or more contributor license agreements.  See the NOTICE file
004    distributed with this work for additional information
005    regarding copyright ownership.  The ASF licenses this file
006    to you under the Apache License, Version 2.0 (the
007    "License"); you may not use this file except in compliance
008    with the License.  You may obtain a copy of the License at
009
010       http://www.apache.org/licenses/LICENSE-2.0
011
012    Unless required by applicable law or agreed to in writing,
013    software distributed under the License is distributed on an
014    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015    KIND, either express or implied.  See the License for the
016    specific language governing permissions and limitations
017    under the License.  
018 */
019package org.apache.wiki.tags;
020
021import java.io.IOException;
022
023import org.apache.wiki.WikiEngine;
024import org.apache.wiki.WikiPage;
025import org.apache.wiki.attachment.Attachment;
026
027/**
028 *  Returns the parent of the currently requested page.  Weblog entries are recognized
029 *  as subpages of the weblog page.
030 *
031 *  @since 2.0
032 */
033public class ParentPageNameTag
034    extends WikiTagBase
035{
036    private static final long serialVersionUID = 0L;
037    
038    /**
039     * {@inheritDoc}
040     */
041    @Override
042    public final int doWikiStartTag()
043        throws IOException
044    {
045        WikiEngine engine = m_wikiContext.getEngine();
046        WikiPage   page   = m_wikiContext.getPage();
047
048        if( page != null )
049        {
050            if( page instanceof Attachment )
051            {
052                pageContext.getOut().print( engine.beautifyTitle( ((Attachment)page).getParentName()) );
053            }
054            else
055            {
056                String name = page.getName();
057
058                int entrystart = name.indexOf("_blogentry_");
059
060                if( entrystart != -1 )
061                {
062                    name = name.substring( 0, entrystart );
063                }
064
065                int commentstart = name.indexOf("_comments_");
066
067                if( commentstart != -1 )
068                {
069                    name = name.substring( 0, commentstart );
070                }
071
072                pageContext.getOut().print( engine.beautifyTitle(name) );
073            }
074        }
075
076        return SKIP_BODY;
077    }
078}