| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * 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 android.content; |
| |
| /** |
| * Representation of an owner of {@link UndoOperation} objects in an {@link UndoManager}. |
| * |
| * @hide |
| */ |
| public class UndoOwner { |
| final String mTag; |
| final UndoManager mManager; |
| |
| Object mData; |
| int mOpCount; |
| |
| // For saving/restoring state. |
| int mStateSeq; |
| int mSavedIdx; |
| |
| UndoOwner(String tag, UndoManager manager) { |
| if (tag == null) { |
| throw new NullPointerException("tag can't be null"); |
| } |
| if (manager == null) { |
| throw new NullPointerException("manager can't be null"); |
| } |
| mTag = tag; |
| mManager = manager; |
| } |
| |
| /** |
| * Return the unique tag name identifying this owner. This is the tag |
| * supplied to {@link UndoManager#getOwner(String, Object) UndoManager.getOwner} |
| * and is immutable. |
| */ |
| public String getTag() { |
| return mTag; |
| } |
| |
| /** |
| * Return the actual data object of the owner. This is the data object |
| * supplied to {@link UndoManager#getOwner(String, Object) UndoManager.getOwner}. An |
| * owner may have a null data if it was restored from a previously saved state with |
| * no getOwner call to associate it with its data. |
| */ |
| public Object getData() { |
| return mData; |
| } |
| |
| @Override |
| public String toString() { |
| return "UndoOwner:[mTag=" + mTag + |
| " mManager=" + mManager + |
| " mData=" + mData + |
| " mData=" + mData + |
| " mOpCount=" + mOpCount + |
| " mStateSeq=" + mStateSeq + |
| " mSavedIdx=" + mSavedIdx + "]"; |
| } |
| } |