/*
 * (c) Copyright IBM Corp. 2000, 2001.
 * All Rights Reserved.
 */
package org.eclipse.compare;

/**
 * Interface common to all objects that provide a means for registering
 * for content change notification.
 * <p>
 * Clients may implement this interface.
 * </p>
 *
 * @see IContentChangeListener
 */
public interface IContentChangeNotifier {
	
	/**
	 * Adds a content change listener to this notifier.
	 * Has no effect if an identical listener is already registered.
	 *
	 * @param listener a content changed listener
	 */
	void addContentChangeListener(IContentChangeListener listener);
	
	/**
	 * Removes the given content changed listener from this notifier.
	 * Has no effect if the listener is not registered.
	 *
	 * @param listener a content changed listener
	 */
	void removeContentChangeListener(IContentChangeListener listener);
}