1 package org.apache.maven.doxia.module.confluence.parser;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import org.apache.maven.doxia.parser.ParseException;
23 import org.apache.maven.doxia.util.ByLineSource;
24
25 /**
26 * <p>FigureBlockParser class.</p>
27 *
28 * @version $Id: FigureBlockParser.java 763889 2009-04-10 08:57:55Z bentmann $
29 * @since 1.1
30 */
31 public class FigureBlockParser
32 implements BlockParser
33 {
34 /** {@inheritDoc} */
35 public boolean accept( String line, ByLineSource source )
36 {
37 return line.startsWith( "!" ) && line.lastIndexOf( "!" ) > 1;
38 }
39
40 /** {@inheritDoc} */
41 public Block visit( String line, ByLineSource source )
42 throws ParseException
43 {
44 String image = line.substring( 1, line.lastIndexOf( "!" ) );
45 if ( image.indexOf( "|" ) >= 0 )
46 {
47 // DOXIA-303: handle figure attributes
48 image = image.substring( 0, image.indexOf( "|" ) );
49 }
50
51 line = line.substring( line.lastIndexOf( "!" ) + 1 ).trim();
52
53 if ( line.startsWith( "\\\\" ) )
54 {
55 // ignore linebreak at start of caption
56 line = line.substring( 2 );
57 }
58
59 String caption = line + appendUntilEmptyLine( source );
60
61 if ( caption.trim().length() > 0 )
62 {
63 return new FigureBlock( image, caption );
64 }
65
66 return new FigureBlock( image );
67 }
68
69 /**
70 * Slurp lines from the source starting with the given line appending them together into a StringBuffer until an
71 * empty line is reached, and while the source contains more lines.
72 *
73 * @param source the source to read new lines from
74 * @return a StringBuffer appended with lines
75 * @throws ParseException
76 */
77 private String appendUntilEmptyLine( ByLineSource source )
78 throws ParseException
79 {
80 StringBuffer text = new StringBuffer();
81
82 String line;
83
84 while ( ( line = source.getNextLine() ) != null )
85 {
86
87 if ( line.trim().length() == 0 )
88 {
89 break;
90 }
91
92 if ( text.length() == 0 )
93 {
94 text.append( line.trim() );
95 }
96 else
97 {
98 text.append( " " + line.trim() );
99 }
100
101 }
102
103 return text.toString();
104 }
105 }