    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.logging.log4j.LogManager;
    022import org.apache.logging.log4j.Logger;
    023import org.apache.wiki.api.core.Context;
    024import org.apache.wiki.render.RenderingManager;
    025
    026import javax.servlet.jsp.JspException;
    027import javax.servlet.jsp.PageContext;
    028import javax.servlet.jsp.tagext.BodyContent;
    029import javax.servlet.jsp.tagext.BodyTagSupport;
    030
    031/**
    032 *  Converts the body text into HTML content.
    033 *
    034 *  @since 2.0
    035 */
    036public class TranslateTag
    037    extends BodyTagSupport
    038{
    039    private static final long serialVersionUID = 0L;
    040
    041    private static final Logger LOG = LogManager.getLogger( TranslateTag.class );
    042
    043    @Override
    044    public final int doAfterBody() throws JspException {
    045        try {
    046            Context context = (Context) pageContext.getAttribute( Context.ATTR_CONTEXT, PageContext.REQUEST_SCOPE );
    047
    048            //  Because the TranslateTag should not affect any of the real page attributes we have to make a clone here.
    049            context = context.deepClone();
    050
    051            //  Get the page data.
    052            final BodyContent bc = getBodyContent();
    053            String wikiText = bc.getString();
    054            bc.clearBody();
    055
    056            if( wikiText != null ) {
    057                wikiText = wikiText.trim();
    058                final String result = context.getEngine().getManager( RenderingManager.class ).textToHTML( context, wikiText );
    059                getPreviousOut().write( result );
    060            }
    061        } catch( final Exception e ) {
    062            LOG.error( "Tag failed", e );
    063            throw new JspException( "Tag failed, check logs: " + e.getMessage() );
    064        }
    065
    066        return SKIP_BODY;
    067    }
    068
    069}