| /******************************************************************************* |
| * Copyright (c) 2013 David Green and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * David Green - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.mylyn.wikitext.textile.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.ListAttributes; |
| import org.eclipse.mylyn.wikitext.parser.markup.Block; |
| |
| public class DefinitionListBlock extends Block { |
| |
| private static final Pattern START_PATTERN = Pattern.compile("(?:(;\\s+(.+))|(-\\s+(.+?)\\s*(:=)\\s*((.+?)\\s*(=:)?)?))"); //$NON-NLS-1$ |
| |
| private static final Pattern END_ITEM_PATTERN = Pattern.compile("(.*?)\\s*(=:)\\s*"); //$NON-NLS-1$ |
| |
| private static final Pattern COLON_START_PATTERN = Pattern.compile(":\\s+(.+)"); //$NON-NLS-1$ |
| |
| private Matcher matcher; |
| |
| private int blockLineCount; |
| |
| private int levelsOpen = 0; |
| |
| private int linesThisItem = 0; |
| |
| @Override |
| protected int processLineContent(String line, int offset) { |
| ++blockLineCount; |
| if (blockLineCount == 1) { |
| beginBlock(BlockType.DEFINITION_LIST, new ListAttributes()); |
| handleStartTerm(); |
| return -1; |
| } else { |
| matcher = START_PATTERN.matcher(line); |
| if (matcher.matches()) { |
| closeItems(); |
| handleStartTerm(); |
| return -1; |
| } else { |
| String content = line; |
| int contentOffset = 0; |
| boolean closeThisLine = false; |
| if (levelsOpen < 2) { |
| Matcher ddMatcher = COLON_START_PATTERN.matcher(line); |
| if (ddMatcher.matches()) { |
| content = ddMatcher.group(1); |
| contentOffset = ddMatcher.start(1); |
| |
| closeItems(); |
| beginBlock(BlockType.DEFINITION_ITEM, new Attributes()); |
| linesThisItem = 0; |
| closeThisLine = true; |
| } else { |
| setClosed(true); |
| return 0; |
| } |
| } else { |
| // continuation of list item. blank line is termination |
| if (markupLanguage.isEmptyLine(line)) { |
| setClosed(true); |
| return 0; |
| } |
| Matcher endMatcher = END_ITEM_PATTERN.matcher(line); |
| if (endMatcher.matches()) { |
| content = endMatcher.group(1); |
| } |
| } |
| if (markupLanguage.isEmptyLine(content)) { |
| closeItems(); |
| return -1; |
| } |
| if (++linesThisItem > 1) { |
| builder.lineBreak(); |
| } |
| markupLanguage.emitMarkupLine(getParser(), state, contentOffset, content, offset); |
| if (closeThisLine) { |
| endBlock(); |
| } |
| } |
| } |
| return -1; |
| } |
| |
| protected void handleStartTerm() { |
| linesThisItem = 0; |
| int textLineOffset; |
| String term = matcher.group(2); |
| String definition = null; |
| int definitionOffset = 0; |
| int definitionSegmentOffset = 0; |
| boolean definitionEnd = false; |
| if (term == null) { |
| term = matcher.group(4); |
| textLineOffset = matcher.start(4); |
| definition = matcher.group(7); |
| definitionOffset = matcher.start(7); |
| definitionEnd = matcher.group(8) != null; |
| definitionSegmentOffset = matcher.start(5); |
| state.setLineSegmentEndOffset(definitionSegmentOffset); |
| } else { |
| textLineOffset = matcher.start(2); |
| } |
| |
| beginBlock(BlockType.DEFINITION_TERM, new Attributes()); |
| markupLanguage.emitMarkupLine(getParser(), state, textLineOffset, term, 0); |
| endBlock(); |
| |
| if (definition != null) { |
| // since it's a mid-line block, we must set the offsets here |
| state.setLineCharacterOffset(definitionSegmentOffset); |
| beginBlock(BlockType.DEFINITION_ITEM, new Attributes()); |
| |
| markupLanguage.emitMarkupLine(getParser(), state, definitionOffset, definition, 0); |
| if (definitionEnd) { |
| endBlock(); |
| } else { |
| linesThisItem = 1; |
| } |
| } |
| } |
| |
| private void closeItems() { |
| while (levelsOpen > 1) { |
| endBlock(); |
| } |
| } |
| |
| public void beginBlock(BlockType type, Attributes attributes) { |
| ++levelsOpen; |
| builder.beginBlock(type, attributes); |
| } |
| |
| public void endBlock() { |
| --levelsOpen; |
| builder.endBlock(); |
| } |
| |
| @Override |
| public void setClosed(boolean closed) { |
| if (closed && !isClosed()) { |
| while (levelsOpen > 0) { |
| endBlock(); |
| } |
| } |
| super.setClosed(closed); |
| } |
| |
| @Override |
| public boolean canStart(String line, int lineOffset) { |
| blockLineCount = 0; |
| matcher = START_PATTERN.matcher(line); |
| if (lineOffset > 0) { |
| matcher.region(lineOffset, line.length()); |
| } |
| if (matcher.matches()) { |
| return true; |
| } |
| matcher = null; |
| return false; |
| } |
| |
| } |