1 /* 2 * Copyright (C) 2021 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 package com.android.launcher3.util; 17 18 import java.util.ArrayList; 19 20 /** 21 * Utility class to hold a list of runnable 22 */ 23 public class RunnableList { 24 25 private ArrayList<Runnable> mList = null; 26 private boolean mDestroyed = false; 27 28 /** 29 * Ads a runnable to this list 30 */ add(Runnable runnable)31 public void add(Runnable runnable) { 32 if (runnable == null) { 33 return; 34 } 35 if (mDestroyed) { 36 runnable.run(); 37 return; 38 } 39 if (mList == null) { 40 mList = new ArrayList<>(); 41 } 42 mList.add(runnable); 43 } 44 45 /** 46 * Destroys the list, executing any pending callbacks. All new callbacks are 47 * immediately executed 48 */ executeAllAndDestroy()49 public void executeAllAndDestroy() { 50 mDestroyed = true; 51 executeAllAndClear(); 52 } 53 54 /** 55 * Executes all previously added runnable and clears the list 56 */ executeAllAndClear()57 public void executeAllAndClear() { 58 if (mList != null) { 59 ArrayList<Runnable> list = mList; 60 mList = null; 61 int count = list.size(); 62 for (int i = 0; i < count; i++) { 63 list.get(i).run(); 64 } 65 } 66 } 67 } 68