| package org.apache.maven.doxia.module.confluence.parser; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| import org.apache.maven.doxia.parser.ParseException; |
| import org.apache.maven.doxia.util.ByLineSource; |
| |
| /** |
| * <p>ParagraphBlockParser class.</p> |
| * |
| * @version $Id$ |
| */ |
| public class ParagraphBlockParser |
| implements BlockParser |
| { |
| private BlockParser[] parsers; |
| |
| /** |
| * <p>Constructor for ParagraphBlockParser.</p> |
| * |
| * @param parsers the parsers. |
| */ |
| public ParagraphBlockParser( BlockParser[] parsers ) |
| { |
| super(); |
| this.parsers = parsers; |
| } |
| |
| /** {@inheritDoc} */ |
| public boolean accept( String line, ByLineSource source ) |
| { |
| return true; |
| } |
| |
| /** |
| * Visit the Block. |
| * |
| * @param line the line to visit. |
| * @param source the source. |
| * @param generateParagraphTags whether to generate a paragraph. |
| * @return the visited Block. |
| * |
| * @throws org.apache.maven.doxia.parser.ParseException if any |
| */ |
| public Block visit( String line, ByLineSource source, boolean generateParagraphTags ) |
| throws ParseException |
| { |
| if ( generateParagraphTags ) |
| { |
| return this.visit( line, source ); |
| } |
| else |
| { |
| ChildBlocksBuilder builder = new ChildBlocksBuilder( line ); |
| return new ParagraphBlock( builder.getBlocks(), generateParagraphTags ); |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| public Block visit( String line, ByLineSource source ) |
| throws ParseException |
| { |
| |
| ChildBlocksBuilder builder = new ChildBlocksBuilder( appendUntilEmptyLine( line, source ) ); |
| return new ParagraphBlock( builder.getBlocks() ); |
| } |
| |
| /** |
| * Slurp lines from the source starting with the given line appending them together into a StringBuilder until an |
| * empty line is reached, and while the source contains more lines. The result can be passed to the |
| * {@link #getBlocks(String)} method. |
| * |
| * @param line the first line |
| * @param source the source to read new lines from |
| * @return a StringBuilder appended with lines |
| * @throws ParseException |
| */ |
| private String appendUntilEmptyLine( String line, ByLineSource source ) |
| throws ParseException |
| { |
| StringBuilder text = new StringBuilder(); |
| |
| do |
| { |
| |
| if ( line.trim().length() == 0 ) |
| { |
| break; |
| } |
| |
| boolean accepted = false; |
| for ( BlockParser parser : parsers ) |
| { |
| if ( parser.accept( line, source ) ) |
| { |
| accepted = true; |
| break; |
| } |
| } |
| if ( accepted ) |
| { |
| // Slightly fragile - if any of the parsers need to do this in order to decide whether to accept a line, |
| // then it will barf because of the contract of ByLineSource |
| source.ungetLine(); |
| break; |
| } |
| |
| if ( text.length() == 0 ) |
| { |
| text.append( line.trim() ); |
| } |
| else |
| { |
| text.append( " " ).append( line.trim() ); |
| } |
| |
| } |
| while ( ( line = source.getNextLine() ) != null ); |
| |
| return text.toString(); |
| } |
| |
| } |