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 com.android.server.wm; 18 19 import android.view.InputChannel; 20 import android.view.InputDevice; 21 import android.view.InputEvent; 22 import android.view.InputEventReceiver; 23 import android.view.MotionEvent; 24 import android.view.WindowManagerPolicy.PointerEventListener; 25 26 import com.android.server.UiThread; 27 28 import java.util.ArrayList; 29 30 public class PointerEventDispatcher extends InputEventReceiver { 31 ArrayList<PointerEventListener> mListeners = new ArrayList<PointerEventListener>(); 32 PointerEventListener[] mListenersArray = new PointerEventListener[0]; 33 34 public PointerEventDispatcher(InputChannel inputChannel) { 35 super(inputChannel, UiThread.getHandler().getLooper()); 36 } 37 38 @Override 39 public void onInputEvent(InputEvent event) { 40 try { 41 if (event instanceof MotionEvent 42 && (event.getSource() & InputDevice.SOURCE_CLASS_POINTER) != 0) { 43 final MotionEvent motionEvent = (MotionEvent)event; 44 PointerEventListener[] listeners; 45 synchronized (mListeners) { 46 if (mListenersArray == null) { 47 mListenersArray = new PointerEventListener[mListeners.size()]; 48 mListeners.toArray(mListenersArray); 49 } 50 listeners = mListenersArray; 51 } 52 for (int i = 0; i < listeners.length; ++i) { 53 listeners[i].onPointerEvent(motionEvent); 54 } 55 } 56 } finally { 57 finishInputEvent(event, false); 58 } 59 } 60 61 /** 62 * Add the specified listener to the list. 63 * @param listener The listener to add. 64 */ 65 public void registerInputEventListener(PointerEventListener listener) { 66 synchronized (mListeners) { 67 if (mListeners.contains(listener)) { 68 throw new IllegalStateException("registerInputEventListener: trying to register" + 69 listener + " twice."); 70 } 71 mListeners.add(listener); 72 mListenersArray = null; 73 } 74 } 75 76 /** 77 * Remove the specified listener from the list. 78 * @param listener The listener to remove. 79 */ 80 public void unregisterInputEventListener(PointerEventListener listener) { 81 synchronized (mListeners) { 82 if (!mListeners.contains(listener)) { 83 throw new IllegalStateException("registerInputEventListener: " + listener + 84 " not registered."); 85 } 86 mListeners.remove(listener); 87 mListenersArray = null; 88 } 89 } 90 } 91
