NavigationController.java revision 116680a4aac90f2aa7413d9095a592090648e557
1// Copyright 2014 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5package org.chromium.content_public.browser; 6 7/** 8 * The NavigationController Java wrapper to allow communicating with the native 9 * NavigationController object. 10 */ 11public interface NavigationController { 12 /** 13 * @return Whether back navigation is possible from the "current entry". 14 */ 15 boolean canGoBack(); 16 17 /** 18 * @return Whether forward navigation is possible from the "current entry". 19 */ 20 boolean canGoForward(); 21 22 /** 23 * @param offset The offset into the navigation history. 24 * @return Whether we can move in history by given offset 25 */ 26 boolean canGoToOffset(int offset); 27 28 /** 29 * Navigates to the specified offset from the "current entry". Does nothing if the offset is 30 * out of bounds. 31 * @param offset The offset into the navigation history. 32 */ 33 void goToOffset(int offset); 34 35 /** 36 * Navigates to the specified index in the navigation entry for this page. 37 * @param index The navigation index to navigate to. 38 */ 39 void goToNavigationIndex(int index); 40 41 /** 42 * Goes to the navigation entry before the current one. 43 */ 44 void goBack(); 45 46 /** 47 * Goes to the navigation entry following the current one. 48 */ 49 void goForward(); 50 51 /** 52 * Loads the current navigation if there is a pending lazy load (after tab restore). 53 */ 54 public void loadIfNecessary(); 55 56 /** 57 * Requests the current navigation to be loaded upon the next call to loadIfNecessary(). 58 */ 59 public void requestRestoreLoad(); 60 61 /** 62 * Reload the current page. 63 */ 64 public void reload(boolean checkForRepost); 65 66 /** 67 * Reload the current page, ignoring the contents of the cache. 68 */ 69 public void reloadIgnoringCache(boolean checkForRepost); 70 71 /** 72 * Cancel the pending reload. 73 */ 74 public void cancelPendingReload(); 75 76 /** 77 * Continue the pending reload. 78 */ 79 public void continuePendingReload(); 80} 81