1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.content; 18 19 /** 20 * Representation of an owner of {@link UndoOperation} objects in an {@link UndoManager}. 21 * 22 * @hide 23 */ 24 public class UndoOwner { 25 final String mTag; 26 27 UndoManager mManager; 28 Object mData; 29 int mOpCount; 30 31 // For saving/restoring state. 32 int mStateSeq; 33 int mSavedIdx; 34 35 UndoOwner(String tag) { 36 mTag = tag; 37 } 38 39 /** 40 * Return the unique tag name identifying this owner. This is the tag 41 * supplied to {@link UndoManager#getOwner(String, Object) UndoManager.getOwner} 42 * and is immutable. 43 */ 44 public String getTag() { 45 return mTag; 46 } 47 48 /** 49 * Return the actual data object of the owner. This is the data object 50 * supplied to {@link UndoManager#getOwner(String, Object) UndoManager.getOwner}. An 51 * owner may have a null data if it was restored from a previously saved state with 52 * no getOwner call to associate it with its data. 53 */ 54 public Object getData() { 55 return mData; 56 } 57 } 58
