// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package org.chromium.content_public.browser;
/**
* The NavigationController Java wrapper to allow communicating with the native
* NavigationController object.
*/
public interface NavigationController {
/**
* @return Whether back navigation is possible from the "current entry".
*/
boolean canGoBack();
/**
* @return Whether forward navigation is possible from the "current entry".
*/
boolean canGoForward();
/**
* @param offset The offset into the navigation history.
* @return Whether we can move in history by given offset
*/
boolean canGoToOffset(int offset);
/**
* Navigates to the specified offset from the "current entry". Does nothing if the offset is
* out of bounds.
* @param offset The offset into the navigation history.
*/
void goToOffset(int offset);
/**
* Navigates to the specified index in the navigation entry for this page.
* @param index The navigation index to navigate to.
*/
void goToNavigationIndex(int index);
/**
* Goes to the navigation entry before the current one.
*/
void goBack();
/**
* Goes to the navigation entry following the current one.
*/
void goForward();
}