/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.server.wm;
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import android.view.InputChannel;
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import android.view.InputDevice;
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import android.view.InputEvent;
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import android.view.InputEventReceiver;
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import android.view.MotionEvent;
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import android.view.WindowManagerPolicyConstants.PointerEventListener;
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import com.android.server.UiThread;
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import java.util.ArrayList;
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public class PointerEventDispatcher extends InputEventReceiver {
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private final InputChannel mInputChannel;
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private final ArrayList<PointerEventListener> mListeners = new ArrayList<>();
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private PointerEventListener[] mListenersArray = new PointerEventListener[0];
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public PointerEventDispatcher(InputChannel inputChannel) {
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super(inputChannel, UiThread.getHandler().getLooper());
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mInputChannel = inputChannel;
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}
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@Override
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public void onInputEvent(InputEvent event) {
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try {
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if (event instanceof MotionEvent
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&& (event.getSource() & InputDevice.SOURCE_CLASS_POINTER) != 0) {
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final MotionEvent motionEvent = (MotionEvent) event;
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PointerEventListener[] listeners;
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synchronized (mListeners) {
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if (mListenersArray == null) {
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mListenersArray = new PointerEventListener[mListeners.size()];
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mListeners.toArray(mListenersArray);
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}
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listeners = mListenersArray;
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}
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for (int i = 0; i < listeners.length; ++i) {
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listeners[i].onPointerEvent(motionEvent);
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}
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}
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} finally {
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finishInputEvent(event, false);
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}
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}
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/**
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* Add the specified listener to the list.
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* @param listener The listener to add.
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*/
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public void registerInputEventListener(PointerEventListener listener) {
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synchronized (mListeners) {
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if (mListeners.contains(listener)) {
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throw new IllegalStateException("registerInputEventListener: trying to register" +
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listener + " twice.");
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}
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mListeners.add(listener);
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mListenersArray = null;
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}
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}
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/**
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* Remove the specified listener from the list.
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* @param listener The listener to remove.
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*/
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public void unregisterInputEventListener(PointerEventListener listener) {
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synchronized (mListeners) {
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if (!mListeners.contains(listener)) {
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throw new IllegalStateException("registerInputEventListener: " + listener +
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" not registered.");
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}
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mListeners.remove(listener);
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mListenersArray = null;
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}
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}
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/** Dispose the associated input channel and clean up the listeners. */
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@Override
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public void dispose() {
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super.dispose();
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mInputChannel.dispose();
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synchronized (mListeners) {
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mListeners.clear();
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mListenersArray = null;
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}
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}
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}
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