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 org.apache.wiki.api.core.ContextEnum;
022import org.apache.wiki.api.core.Engine;
023import org.apache.wiki.i18n.InternationalizationManager;
024import org.apache.wiki.preferences.Preferences;
025import org.apache.wiki.rss.RSSGenerator;
026
027import javax.servlet.jsp.JspWriter;
028import java.io.IOException;
029import java.text.MessageFormat;
030import java.util.ResourceBundle;
031
032/**
033 *  Writes an image link to a JSPWiki RSS file.  If RSS generation has
034 *  been turned off in jspwiki.properties, returns an empty string.
035 *
036 *  @since 2.0
037 */
038public class RSSImageLinkTag
039    extends WikiTagBase
040{
041    private static final long serialVersionUID = 0L;
042
043    protected String m_title;
044    private   String m_mode;
045    private   String m_pageName;
046
047    /**
048     *  {@inheritDoc}
049     */
050    @Override
051    public void initTag()
052    {
053        super.initTag();
054        m_title = null;
055        m_mode  = RSSGenerator.MODE_FULL;
056        m_pageName = null;
057    }
058
059    /**
060     *  Sets the title for the link.  If not defined, no title is shown.
061     *
062     *  @param title A string for the title.
063     */
064    public void setTitle( final String title )
065    {
066        m_title = title;
067    }
068
069    public void setMode( final String mode )
070    {
071        m_mode = mode;
072    }
073
074
075    /**
076     *  Returns the title.
077     *
078     *  @return The title.
079     */
080    public String getTitle()
081    {
082        return m_title;
083    }
084
085    /**
086     *  {@inheritDoc}
087     */
088    @Override
089    public final int doWikiStartTag() throws IOException {
090        final Engine engine = m_wikiContext.getEngine();
091        final JspWriter out = pageContext.getOut();
092        final ResourceBundle rb = Preferences.getBundle( m_wikiContext, InternationalizationManager.CORE_BUNDLE );
093        if( engine.getManager( RSSGenerator.class ) != null && engine.getManager( RSSGenerator.class ).isEnabled() ) {
094            if( RSSGenerator.MODE_FULL.equals(m_mode) ) {
095                final String rssURL = engine.getGlobalRSSURL();
096                if( rssURL != null ) {
097                    out.print("<a class=\"feed\" href=\""+rssURL);
098                    out.print( " title='"+rb.getString( "rss.title.full" )+"'>" );
099                    out.print( "&nbsp;</a> ");
100                }
101            } else {
102                final String page = m_pageName != null ? m_pageName : m_wikiContext.getPage().getName();
103                final String params = "page="+page+"&mode="+m_mode;
104                out.print( "<a href='"+m_wikiContext.getURL( ContextEnum.PAGE_NONE.getRequestContext(), "rss.jsp", params ));
105                out.print( "' class='feed'" );
106                out.print( " title='"+MessageFormat.format( rb.getString( "rss.title" ), page )+"'>" );
107                out.print( "&nbsp;</a> ");
108            }
109        }
110
111        return SKIP_BODY;
112    }
113
114}