/*******************************************************************************
 * Copyright (c) 2000, 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
 *******************************************************************************/

package org.eclipse.ui;

/**
 * Should be implemented by editors that wish to contribute to the
 * navigation history. The message <code>createNavigationLocation</code>
 * will be sent when a new location is marked in the history.
 * 
 * @since 2.1
 */
public interface INavigationLocationProvider {
    /**
     * Creates an empty navigation location. The message <code>restoreState</code>
     * will be sent to the location to restore its state.
     * 
     * @return INavigationLocation
     */
    public INavigationLocation createEmptyNavigationLocation();

    /**
     * Creates a navigation location describing the current state.
     * 
     * @return INavigationLocation
     */
    public INavigationLocation createNavigationLocation();
}
