/*******************************************************************************
* Copyright (c) 2007, 2011 David Green 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:
* David Green - initial API and implementation
*******************************************************************************/
package org.eclipse.mylyn.wikitext.textile.internal.validation;
import java.text.MessageFormat;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.eclipse.mylyn.wikitext.validation.ValidationProblem;
import org.eclipse.mylyn.wikitext.validation.ValidationRule;
/**
* @author David Green
*/
public class BlockWhitespaceRule extends ValidationRule {
private static final Pattern pattern = Pattern.compile("((?:bc|bq|pre|table|p)(?:\\.){1,2})(.)?", Pattern.MULTILINE); //$NON-NLS-1$
@Override
public ValidationProblem findProblem(String markup, int offset, int length) {
Matcher matcher = pattern.matcher(markup);
if (offset > 0) {
matcher.region(offset, offset + length);
}
while (matcher.find()) {
int start = matcher.start();
boolean startOfLine = false;
if (start == 0) {
startOfLine = true;
} else {
char c = markup.charAt(start - 1);
if (c == '\r' || c == '\n') {
startOfLine = true;
}
}
if (startOfLine) {
String followingCharacter = matcher.group(2);
if (followingCharacter == null || !followingCharacter.equals(" ")) { //$NON-NLS-1$
int problemLength = matcher.end(1) - start;
String matched = matcher.group(1);
return new ValidationProblem(ValidationProblem.Severity.WARNING, MessageFormat.format(
Messages.getString("BlockWhitespaceRule.2"), //$NON-NLS-1$
matched), start, problemLength);
}
}
}
return null;
}
}