platform/vcs-impl/src/com/intellij/openapi/vcs/changes/committed/CommittedChangesNavigation.java

/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * 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.intellij.openapi.vcs.changes.committed;

import com.intellij.openapi.vcs.VcsException;

public interface CommittedChangesNavigation {
  boolean canGoBack();
  boolean canGoForward();
  void goBack() throws VcsException;
  void goForward();
  void onBeforeClose();
}