001package org.apache.maven.doxia.module.twiki.parser; 002 003/* 004 * Licensed to the Apache Software Foundation (ASF) under one 005 * or more contributor license agreements. See the NOTICE file 006 * distributed with this work for additional information 007 * regarding copyright ownership. The ASF licenses this file 008 * to you under the Apache License, Version 2.0 (the 009 * "License"); you may not use this file except in compliance 010 * with the License. You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, 015 * software distributed under the License is distributed on an 016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 017 * KIND, either express or implied. See the License for the 018 * specific language governing permissions and limitations 019 * under the License. 020 */ 021 022import java.util.ArrayList; 023import java.util.List; 024import java.util.regex.Matcher; 025import java.util.regex.Pattern; 026 027import org.apache.maven.doxia.parser.ParseException; 028import org.apache.maven.doxia.util.ByLineSource; 029 030/** 031 * Parse verbatim blocks 032 * 033 * @author Christian Nardi 034 * @version $Id: VerbatimBlockParser.html 905940 2014-04-12 16:27:29Z hboutemy $ 035 * @since 1.1 036 */ 037public class VerbatimBlockParser 038 implements BlockParser 039{ 040 /** 041 * pattern to detect verbatim start tags 042 */ 043 private static final Pattern VERBATIM_START_PATTERN = Pattern.compile( "\\s*<verbatim>" ); 044 045 private static final Pattern VERBATIM_END_PATTERN = Pattern.compile( "</verbatim>" ); 046 047 /** {@inheritDoc} */ 048 public final boolean accept( final String line ) 049 { 050 return VERBATIM_START_PATTERN.matcher( line ).lookingAt(); 051 } 052 053 /** 054 * {@inheritDoc} 055 */ 056 public final Block visit( final String line, final ByLineSource source ) 057 throws ParseException 058 { 059 if ( !accept( line ) ) 060 { 061 throw new IllegalAccessError( "call accept before this ;)" ); 062 } 063 064 final List<Block> lines = new ArrayList<Block>(); 065 Matcher matcher = VERBATIM_START_PATTERN.matcher( line ); 066 matcher.find(); 067 String l = line.substring( matcher.end() ); 068 069 while ( l != null ) 070 { 071 matcher = VERBATIM_END_PATTERN.matcher( l ); 072 if ( matcher.find() ) 073 { 074 lines.add( new TextBlock( l.substring( 0, matcher.start() ) + "\n" ) ); 075 break; 076 } 077 lines.add( new TextBlock( l + "\n" ) ); 078 l = source.getNextLine(); 079 } 080 081 return new VerbatimBlock( lines.toArray( new Block[] {} ) ); 082 } 083}