/*******************************************************************************
 * Copyright (c) 2001, 2004 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *     Jens Lukowski/Innoopract - initial renaming/restructuring
 *     
 *******************************************************************************/
package org.eclipse.wst.sse.ui.extensions.openon;

import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IRegion;

/**
 * Interface for Open On... navigation
 * 
 * @author amywu
 */
public interface IOpenOn {
	/**
	 * Returns the entire region relevant to the current offset where an
	 * openable source region is found. null if offset does not contain an
	 * openable source.
	 * 
	 * @param document
	 *            IDocument
	 * @param offset
	 *            int
	 * @return IRegion entire region of openable source
	 */
	public IRegion getOpenOnRegion(IDocument document, int offset);

	/**
	 * Opens the file/source relevant to region if possible.
	 * 
	 * @param viewer
	 *            ITextViewer
	 * @param region
	 *            Region to examine
	 */
	public void openOn(IDocument document, IRegion region);
}