1/* 2 * Copyright (C) 2016 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 17package android.support.transition; 18 19import android.os.IBinder; 20import android.support.annotation.NonNull; 21import android.view.View; 22 23 24/** 25 * Backport of WindowId. 26 * 27 * <p>Since the use of WindowId in Transition API is limited to identifying windows, we can just 28 * wrap a window token and use it as an identifier.</p> 29 */ 30class WindowIdPort { 31 32 private final IBinder mToken; 33 34 private WindowIdPort(IBinder token) { 35 mToken = token; 36 } 37 38 static WindowIdPort getWindowId(@NonNull View view) { 39 return new WindowIdPort(view.getWindowToken()); 40 } 41 42 @Override 43 public boolean equals(Object obj) { 44 return obj instanceof WindowIdPort && ((WindowIdPort) obj).mToken.equals(this.mToken); 45 } 46 47} 48