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    import org.apache.wiki.WikiEngine;
026    import org.apache.wiki.WikiPage;
027    
028    /**
029     *  Writes a link to the Wiki PageInfo.  Body of the link becomes the actual text.
030     *
031     *  <P><B>Attributes</B></P>
032     *  <UL>
033     *    <LI>page - Page name to refer to.  Default is the current page.
034     *    <LI>title - Is used in page actions to display hover text (tooltip)
035     *    <LI>accesskey - Set an accesskey (ALT+[Char])
036     *  </UL>
037     *
038     *  @since 2.0
039     */
040    // FIXME: Refactor together with LinkToTag and EditLinkTag.
041    public class PageInfoLinkTag
042        extends WikiLinkTag
043    {
044        private static final long serialVersionUID = 0L;
045        public String m_title = "";
046        public String m_accesskey = "";
047        
048        public void setTitle( String title )
049        {
050            m_title = title;
051        }
052    
053        public void setAccesskey( String access )
054        {
055            m_accesskey = access;
056        }
057        
058        public final int doWikiStartTag()
059            throws IOException
060        {
061            WikiEngine engine = m_wikiContext.getEngine();
062            String     pageName = m_pageName;
063    
064            if( m_pageName == null )
065            {
066                WikiPage p = m_wikiContext.getPage();
067    
068                if( p != null )
069                {
070                    pageName = p.getName();
071                }
072                else
073                {
074                    return SKIP_BODY;
075                }
076            }
077    
078            if( engine.pageExists(pageName) )
079            {
080                JspWriter out = pageContext.getOut();
081    
082                String url = m_wikiContext.getURL( WikiContext.INFO, pageName );
083    
084                switch( m_format )
085                {
086                  case ANCHOR:
087                    out.print("<a class=\"pageinfo\" href=\""+url+"\" accesskey=\"" 
088                              + m_accesskey + "\" title=\"" + m_title + "\">");
089                    break;
090                  case URL:
091                    out.print( url );
092                    break;
093                }
094    
095                return EVAL_BODY_INCLUDE;
096            }
097    
098            return SKIP_BODY;
099        }
100    }