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/*******************************************************************************
* Copyright (c) 2012 Stefan Seelmann and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Stefan Seelmann - initial API and implementation
*******************************************************************************/
package org.eclipse.mylyn.internal.wikitext.markdown.core.block;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.eclipse.mylyn.wikitext.core.parser.Attributes;
import org.eclipse.mylyn.wikitext.core.parser.DocumentBuilder.BlockType;
import org.eclipse.mylyn.wikitext.core.parser.markup.Block;
/**
* Markdown code block.
*
* @author Stefan Seelmann
*/
public class CodeBlock extends Block {
private static final Pattern startPattern = Pattern.compile("(?: {4}|\\t)((?: {4}|\\t)*)(.*)"); //$NON-NLS-1$
private int blockLineCount = 0;
@Override
public boolean canStart(String line, int lineOffset) {
if (lineOffset == 0) {
return startPattern.matcher(line).matches();
} else {
return false;
}
}
@Override
protected int processLineContent(String line, int offset) {
// start of block
if (blockLineCount == 0) {
builder.beginBlock(BlockType.PREFORMATTED, new Attributes());
builder.beginBlock(BlockType.CODE, new Attributes());
}
// extract the content
Matcher matcher = startPattern.matcher(line);
if (!matcher.matches()) {
setClosed(true);
return 0;
}
String intent = matcher.group(1);
String content = matcher.group(2);
// next line, does not convert to line break
if (blockLineCount > 0) {
builder.characters("\n"); //$NON-NLS-1$
}
// emit, replace intention tabs by 4 spaces, encode ampersands (&) and angle brackets (< and >)
if (intent != null) {
builder.characters(intent.replace("\t", " ")); //$NON-NLS-1$ //$NON-NLS-2$
}
builder.characters(content);
blockLineCount++;
return -1;
}
@Override
public void setClosed(boolean closed) {
if (closed && !isClosed()) {
builder.endBlock();
builder.endBlock();
}
super.setClosed(closed);
}
}
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