| /******************************************************************************* |
| * Copyright (c) 2012, 2015 Stefan Seelmann and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Stefan Seelmann - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.mylyn.wikitext.markdown.internal.block; |
| |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| import org.eclipse.mylyn.wikitext.parser.Attributes; |
| import org.eclipse.mylyn.wikitext.parser.DocumentBuilder.BlockType; |
| import org.eclipse.mylyn.wikitext.parser.markup.Block; |
| |
| /** |
| * Markdown blockquote. |
| * |
| * @author Stefan Seelmann |
| */ |
| public class QuoteBlock extends NestableBlock { |
| |
| private static final Pattern startPattern = Pattern.compile(">\\s?(.*)"); //$NON-NLS-1$ |
| |
| private static final Pattern linePattern = Pattern.compile("(?:>\\s?)?(.*)"); //$NON-NLS-1$ |
| |
| private int blockLineCount = 0; |
| |
| private Block nestedBlock = null; |
| |
| @Override |
| public boolean canStart(String line, int lineOffset) { |
| return startPattern.matcher(line.substring(lineOffset)).matches(); |
| } |
| |
| @Override |
| protected int processLineContent(String line, int offset) { |
| |
| String text = line.substring(offset); |
| // start of block |
| if (blockLineCount == 0) { |
| builder.beginBlock(BlockType.QUOTE, new Attributes()); |
| } |
| |
| // empty line: end of block |
| if (markupLanguage.isEmptyLine(text)) { |
| setClosed(true); |
| return offset; |
| } |
| |
| // extract the content |
| Matcher matcher = linePattern.matcher(text); |
| if (!matcher.matches()) { |
| setClosed(true); |
| return offset; |
| } |
| int contentStart = offset + matcher.start(1); |
| |
| if (nestedBlock != null) { |
| int processed = nestedBlock.processLine(line, contentStart); |
| if (nestedBlock.isClosed()) { |
| nestedBlock = null; |
| if (processed >= contentStart && processed < line.length()) { |
| processNextBlock(line, contentStart); |
| } |
| } |
| } else { |
| processNextBlock(line, contentStart); |
| } |
| |
| blockLineCount++; |
| return -1; |
| } |
| |
| private void processNextBlock(String line, int contentStart) { |
| // determine nested block, at least the paragraph block must match |
| for (Block block : getMarkupLanguage().getBlocks()) { |
| if (block.canStart(line, contentStart)) { |
| nestedBlock = clone(block); |
| break; |
| } |
| } |
| // delegate content processing to nested block |
| nestedBlock.processLine(line, contentStart); |
| if (nestedBlock.isClosed()) { |
| nestedBlock = null; |
| } |
| } |
| |
| private Block clone(Block block) { |
| Block clonedBlock = block.clone(); |
| clonedBlock.setParser(getParser()); |
| clonedBlock.setState(getState()); |
| return clonedBlock; |
| } |
| |
| @Override |
| public void setClosed(boolean closed) { |
| if (nestedBlock != null) { |
| nestedBlock.setClosed(true); |
| nestedBlock = null; |
| } |
| if (closed && !isClosed()) { |
| builder.endBlock(); |
| } |
| super.setClosed(closed); |
| } |
| } |