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 javax.servlet.jsp.JspException; 022 import javax.servlet.jsp.PageContext; 023 import javax.servlet.jsp.tagext.BodyContent; 024 import javax.servlet.jsp.tagext.BodyTagSupport; 025 026 import org.apache.wiki.WikiContext; 027 028 import org.apache.log4j.Logger; 029 030 /** 031 * Converts the body text into HTML content. 032 * 033 * @since 2.0 034 */ 035 public class TranslateTag 036 extends BodyTagSupport 037 { 038 private static final long serialVersionUID = 0L; 039 040 static Logger log = Logger.getLogger( TranslateTag.class ); 041 042 public final int doAfterBody() 043 throws JspException 044 { 045 try 046 { 047 WikiContext context = (WikiContext) pageContext.getAttribute( WikiTagBase.ATTR_CONTEXT, 048 PageContext.REQUEST_SCOPE ); 049 050 // 051 // Because the TranslateTag should not affect any of the real page attributes 052 // we have to make a clone here. 053 // 054 055 context = context.deepClone(); 056 057 // 058 // Get the page data. 059 // 060 BodyContent bc = getBodyContent(); 061 String wikiText = bc.getString(); 062 bc.clearBody(); 063 064 if( wikiText != null ) 065 { 066 wikiText = wikiText.trim(); 067 068 String result = context.getEngine().textToHTML( context, wikiText ); 069 070 getPreviousOut().write( result ); 071 } 072 } 073 catch( Exception e ) 074 { 075 log.error( "Tag failed", e ); 076 throw new JspException( "Tag failed, check logs: "+e.getMessage() ); 077 } 078 079 return SKIP_BODY; 080 } 081 }