001package org.apache.maven.doxia.module.confluence.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 org.apache.maven.doxia.parser.ParseException; 023import org.apache.maven.doxia.util.ByLineSource; 024 025/** 026 * <p>FigureBlockParser class.</p> 027 * 028 * @since 1.1 029 */ 030public class FigureBlockParser 031 implements BlockParser 032{ 033 /** {@inheritDoc} */ 034 public boolean accept( String line, ByLineSource source ) 035 { 036 return line.startsWith( "!" ) && line.lastIndexOf( "!" ) > 1; 037 } 038 039 /** {@inheritDoc} */ 040 public Block visit( String line, ByLineSource source ) 041 throws ParseException 042 { 043 String image = line.substring( 1, line.lastIndexOf( "!" ) ); 044 if ( image.contains( "|" ) ) 045 { 046 // DOXIA-303: handle figure attributes 047 image = image.substring( 0, image.indexOf( "|" ) ); 048 } 049 050 line = line.substring( line.lastIndexOf( "!" ) + 1 ).trim(); 051 052 if ( line.startsWith( "\\\\" ) ) 053 { 054 // ignore linebreak at start of caption 055 line = line.substring( 2 ); 056 } 057 058 String caption = line + appendUntilEmptyLine( source ); 059 060 if ( caption.trim().length() > 0 ) 061 { 062 return new FigureBlock( image, caption ); 063 } 064 065 return new FigureBlock( image ); 066 } 067 068 /** 069 * Slurp lines from the source starting with the given line appending them together into a StringBuilder until an 070 * empty line is reached, and while the source contains more lines. 071 * 072 * @param source the source to read new lines from 073 * @return a StringBuilder appended with lines 074 * @throws ParseException 075 */ 076 private String appendUntilEmptyLine( ByLineSource source ) 077 throws ParseException 078 { 079 StringBuilder text = new StringBuilder(); 080 081 String line; 082 083 while ( ( line = source.getNextLine() ) != null ) 084 { 085 086 if ( line.trim().length() == 0 ) 087 { 088 break; 089 } 090 091 if ( text.length() == 0 ) 092 { 093 text.append( line.trim() ); 094 } 095 else 096 { 097 text.append( " " ).append( line.trim() ); 098 } 099 100 } 101 102 return text.toString(); 103 } 104}