/*
Copyright 2011-2016 Google Inc. All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package com.google.security.zynamics.binnavi.Gui.GraphWindows.Undo;

/**
 * Interface for listener objects that want to be notified about changes in selection histories.
 */
public interface ISelectionHistoryListener {
  /**
   * Signals the end of a Redo operation.
   */
  void finishedRedo();

  /**
   * Signals the end of an Undo operation.
   */
  void finishedUndo();

  /**
   * Invoked after a snapshot was added to the selection history.
   *
   * @param snapshot The added snapshot.
   */
  void snapshotAdded(CSelectionSnapshot snapshot);

  /**
   * Invoked after a snapshot was removed from the selection history.
   */
  void snapshotRemoved();

  /**
   * Signals the start of a Redo operation.
   */
  void startedRedo();

  /**
   * Signals the start of an Undo operation.
   */
  void startedUndo();
}
