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.Attachment;
022import org.apache.wiki.api.core.ContextEnum;
023import org.apache.wiki.api.core.Page;
024import org.apache.wiki.attachment.AttachmentManager;
025
026import javax.servlet.jsp.JspWriter;
027import java.io.IOException;
028
029
030/**
031 * Writes a link to a Wiki page.  Body of the link becomes the actual text.
032 * The link is written regardless to whether the page exists or not.
033 * <P><B>Attributes</B></P>
034 * <UL>
035 * <LI>page - Page name to refer to.  Default is the current page.
036 * <LI>format - either "anchor" or "url" to output either an <A>... or just the HREF part of one.
037 * <LI>template - Which template should we link to.
038 * <LI>title - Is used in page actions to display hover text (tooltip)
039 * <LI>accesskey - Set an accesskey (ALT+[Char])
040 * </UL>
041 *
042 * @since 2.0
043 */
044public class LinkToTag extends WikiLinkTag {
045
046    private static final long serialVersionUID = 0L;
047
048    private String m_version;
049    public String m_title = "";
050    public String m_accesskey = "";
051
052    @Override
053    public void initTag() {
054        super.initTag();
055        m_version = null;
056    }
057
058    public String getVersion() {
059        return m_version;
060    }
061
062    public void setVersion( final String arg ) {
063        m_version = arg;
064    }
065
066    public void setTitle( final String title ) {
067        m_title = title;
068    }
069
070    public void setAccesskey( final String access ) {
071        m_accesskey = access;
072    }
073
074    @Override
075    public int doWikiStartTag() throws IOException {
076        String pageName = m_pageName;
077        boolean isattachment = false;
078
079        if( m_pageName == null ) {
080            final Page p = m_wikiContext.getPage();
081
082            if( p != null ) {
083                pageName = p.getName();
084
085                isattachment = p instanceof Attachment;
086            } else {
087                return SKIP_BODY;
088            }
089        }
090
091        final JspWriter out = pageContext.getOut();
092        final String url;
093        final String linkclass;
094        String forceDownload = "";
095
096        if( isattachment ) {
097            url = m_wikiContext.getURL( ContextEnum.PAGE_ATTACH.getRequestContext(), pageName, ( getVersion() != null ) ? "version=" + getVersion() : null );
098            linkclass = "attachment";
099
100            if( m_wikiContext.getEngine().getManager( AttachmentManager.class ).forceDownload( pageName ) ) {
101                forceDownload = "download ";
102            }
103
104        } else {
105            final StringBuilder params = new StringBuilder();
106            if( getVersion() != null ) {
107                params.append( "version=" ).append( getVersion() );
108            }
109            if( getTemplate() != null ) {
110                params.append( params.length() > 0 ? "&amp;" : "" ).append( "skin=" ).append( getTemplate() );
111            }
112
113            url = m_wikiContext.getURL( ContextEnum.PAGE_VIEW.getRequestContext(), pageName, params.toString() );
114            linkclass = "wikipage";
115        }
116
117        switch( m_format ) {
118        case ANCHOR:
119            out.print( "<a class=\"" + linkclass +
120                       "\" href=\"" + url +
121                       "\" accesskey=\"" + m_accesskey +
122                       "\" title=\"" + m_title + "\" " + forceDownload + ">" );
123            break;
124        case URL:
125            out.print( url );
126            break;
127        }
128
129        return EVAL_BODY_INCLUDE;
130    }
131
132}