redocs/org.eclipse.statet.redocs.wikitext.r.textile/src/org/eclipse/statet/internal/redocs/wikitext/r/textile/core/TextileValidator.java

/*=============================================================================#
 # Copyright (c) 2014, 2019 Stephan Wahlbrink and others.
 # 
 # This program and the accompanying materials are made available under the
 # terms of the Eclipse Public License 2.0 which is available at
 # https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
 # which is available at https://www.apache.org/licenses/LICENSE-2.0.
 # 
 # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
 # 
 # Contributors:
 #     Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation
 #=============================================================================*/

package org.eclipse.statet.internal.redocs.wikitext.r.textile.core;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.osgi.util.NLS;

import org.eclipse.statet.jcommons.text.core.TextLineInformation;

import org.eclipse.statet.docmlet.wikitext.core.WikitextProblemReporter;
import org.eclipse.statet.docmlet.wikitext.core.model.IWikidocModelInfo;
import org.eclipse.statet.docmlet.wikitext.core.model.WikitextModel;
import org.eclipse.statet.docmlet.wikitext.core.model.WikitextSourceUnit;
import org.eclipse.statet.internal.redocs.wikitext.r.textile.Messages;
import org.eclipse.statet.ltk.core.SourceContent;
import org.eclipse.statet.ltk.issues.core.BasicProblem;
import org.eclipse.statet.ltk.issues.core.Problem;
import org.eclipse.statet.ltk.issues.core.ProblemRequestor;


public class TextileValidator extends WikitextProblemReporter {
	
	
	private static final Pattern BLOCK_START_PATTERN= Pattern.compile("\\A((?:bc|bq|pre|table|p)\\.\\.?+)(.)?"); //$NON-NLS-1$
	
	
	public TextileValidator() {
	}
	
	
	@Override
	public void run(final WikitextSourceUnit su, final SourceContent content,
			final IWikidocModelInfo model,
			final ProblemRequestor requestor, final int level, final IProgressMonitor monitor) {
		
		final Matcher matcher= BLOCK_START_PATTERN.matcher(content.getText());
		
		final TextLineInformation lines= content.getLines();
		final int numLines= lines.getNumberOfLines();
		int start= 0;
		for (int line= 0; line < numLines; line++) {
			final int end= lines.getEndOffset(line);
			matcher.region(start, end);
			if (matcher.find()) {
				final String followingCharacter= matcher.group(2);
				if (followingCharacter == null || !followingCharacter.equals(" ")) { //$NON-NLS-1$
					final String matched= matcher.group(1);
					requestor.acceptProblems(new BasicProblem(WikitextModel.WIKIDOC_TYPE_ID,
							Problem.SEVERITY_WARNING, 0,
							NLS.bind(Messages.Validation_BlockWhitespace_message, matched),
							line, start, matcher.end(1) ));
				}
			}
			start= end;
		}
	}
	
}