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     */
019    package org.apache.wiki.tags;
020    
021    import java.io.IOException;
022    import javax.servlet.jsp.JspWriter;
023    
024    import org.apache.wiki.WikiContext;
025    
026    /**
027     *  Writes a link to the upload page.  Body of the link becomes the actual text.
028     *  The link is written regardless to whether the page exists or not.
029     *
030     *  <P><B>Attributes</B></P>
031     *  <UL>
032     *    <LI>page - Page name to refer to.  Default is the current page.
033     *    <LI>format - either "anchor" or "url" to output either an <A>... or just the HREF part of one.
034     *  </UL>
035     *
036     *  @since 2.0
037     */
038    public class UploadLinkTag
039        extends WikiLinkTag
040    {
041        private static final long serialVersionUID = 0L;
042        
043        public final int doWikiStartTag()
044            throws IOException
045        {
046            String     pageName = m_pageName;
047    
048            if( m_pageName == null )
049            {
050                if( m_wikiContext.getPage() != null )
051                {
052                    pageName = m_wikiContext.getPage().getName();
053                }
054                else
055                {
056                    return SKIP_BODY;
057                }
058            }
059    
060            JspWriter out = pageContext.getOut();
061    
062            String url = m_wikiContext.getURL( WikiContext.UPLOAD,
063                                               pageName );
064    
065            switch( m_format )
066            {
067              case ANCHOR:
068                out.print("<a target=\"_new\" class=\"uploadlink\" href=\""+url+"\">");
069                break;
070              case URL:
071                out.print( url );
072                break;
073            }
074    
075            return EVAL_BODY_INCLUDE;
076        }
077    
078    }