19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2006 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage android.webkit; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.io.Serializable; 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This class contains the back/forward list for a WebView. 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WebView.copyBackForwardList() will return a copy of this class used to 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * inspect the entries in the list. 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class WebBackForwardList implements Cloneable, Serializable { 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 29fcc1f75bdf21a89f0a40c323efae4d6a817cced5Jesse Greenwald * @hide 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 31fcc1f75bdf21a89f0a40c323efae4d6a817cced5Jesse Greenwald public WebBackForwardList() { 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Return the current history item. This method returns null if the list is 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * empty. 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The current history item. 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public synchronized WebHistoryItem getCurrentItem() { 40fcc1f75bdf21a89f0a40c323efae4d6a817cced5Jesse Greenwald throw new MustOverrideException(); 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Get the index of the current history item. This index can be used to 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * directly index into the array list. 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The current index from 0...n or -1 if the list is empty. 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public synchronized int getCurrentIndex() { 49fcc1f75bdf21a89f0a40c323efae4d6a817cced5Jesse Greenwald throw new MustOverrideException(); 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Get the history item at the given index. The index range is from 0...n 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * where 0 is the first item and n is the last item. 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param index The index to retrieve. 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public synchronized WebHistoryItem getItemAtIndex(int index) { 58fcc1f75bdf21a89f0a40c323efae4d6a817cced5Jesse Greenwald throw new MustOverrideException(); 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Get the total size of the back/forward list. 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The size of the list. 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public synchronized int getSize() { 66fcc1f75bdf21a89f0a40c323efae4d6a817cced5Jesse Greenwald throw new MustOverrideException(); 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Clone the entire object to be used in the UI thread by clients of 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WebView. This creates a copy that should never be modified by any of the 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * webkit package classes. 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected synchronized WebBackForwardList clone() { 75fcc1f75bdf21a89f0a40c323efae4d6a817cced5Jesse Greenwald throw new MustOverrideException(); 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 79