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 * @since 1.1
29 */
30 public class FigureBlockParser
31 implements BlockParser
32 {
33 /** {@inheritDoc} */
34 public boolean accept( String line, ByLineSource source )
35 {
36 return line.startsWith( "!" ) && line.lastIndexOf( "!" ) > 1;
37 }
38
39 /** {@inheritDoc} */
40 public Block visit( String line, ByLineSource source )
41 throws ParseException
42 {
43 String image = line.substring( 1, line.lastIndexOf( "!" ) );
44 if ( image.contains( "|" ) )
45 {
46 // DOXIA-303: handle figure attributes
47 image = image.substring( 0, image.indexOf( "|" ) );
48 }
49
50 line = line.substring( line.lastIndexOf( "!" ) + 1 ).trim();
51
52 if ( line.startsWith( "\\\\" ) )
53 {
54 // ignore linebreak at start of caption
55 line = line.substring( 2 );
56 }
57
58 String caption = line + appendUntilEmptyLine( source );
59
60 if ( caption.trim().length() > 0 )
61 {
62 return new FigureBlock( image, caption );
63 }
64
65 return new FigureBlock( image );
66 }
67
68 /**
69 * Slurp lines from the source starting with the given line appending them together into a StringBuilder until an
70 * empty line is reached, and while the source contains more lines.
71 *
72 * @param source the source to read new lines from
73 * @return a StringBuilder appended with lines
74 * @throws ParseException
75 */
76 private String appendUntilEmptyLine( ByLineSource source )
77 throws ParseException
78 {
79 StringBuilder text = new StringBuilder();
80
81 String line;
82
83 while ( ( line = source.getNextLine() ) != null )
84 {
85
86 if ( line.trim().length() == 0 )
87 {
88 break;
89 }
90
91 if ( text.length() == 0 )
92 {
93 text.append( line.trim() );
94 }
95 else
96 {
97 text.append( " " ).append( line.trim() );
98 }
99
100 }
101
102 return text.toString();
103 }
104 }