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 java.io.IOException; 022 023import org.apache.log4j.Logger; 024import org.apache.wiki.WikiEngine; 025import org.apache.wiki.WikiPage; 026import org.apache.wiki.api.exceptions.ProviderException; 027 028/** 029 * Returns the currently requested page or attachment size. 030 * 031 * @since 2.0 032 */ 033public class PageSizeTag 034 extends WikiTagBase 035{ 036 private static final long serialVersionUID = 0L; 037 private static final Logger log = Logger.getLogger( PageSizeTag.class ); 038 039 public final int doWikiStartTag() 040 throws IOException 041 { 042 WikiEngine engine = m_wikiContext.getEngine(); 043 WikiPage page = m_wikiContext.getPage(); 044 045 try 046 { 047 if( page != null ) 048 { 049 long size = page.getSize(); 050 051 if( size == -1 && engine.pageExists(page) ) // should never happen with attachments 052 { 053 size = engine.getPureText( page.getName(), page.getVersion() ).length(); 054 page.setSize( size ); 055 } 056 057 pageContext.getOut().write( Long.toString(size) ); 058 } 059 } 060 catch( ProviderException e ) 061 { 062 log.warn("Providers did not work: ",e); 063 pageContext.getOut().write("Error determining page size: "+e.getMessage()); 064 } 065 066 return SKIP_BODY; 067 } 068}