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/*
* 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 org.godotengine.godot.input;
import android.os.Handler;
import android.os.Message;
import android.os.SystemClock;
import android.util.Log;
import android.util.SparseArray;
import android.view.InputDevice;
import android.view.MotionEvent;
import java.lang.ref.WeakReference;
import java.util.ArrayDeque;
import java.util.HashMap;
import java.util.Map;
import java.util.Queue;
public class InputManagerV9 implements InputManagerCompat {
private static final String LOG_TAG = "InputManagerV9";
private static final int MESSAGE_TEST_FOR_DISCONNECT = 101;
private static final long CHECK_ELAPSED_TIME = 3000L;
private static final int ON_DEVICE_ADDED = 0;
private static final int ON_DEVICE_CHANGED = 1;
private static final int ON_DEVICE_REMOVED = 2;
private final SparseArray<long[]> mDevices;
private final Map<InputDeviceListener, Handler> mListeners;
private final Handler mDefaultHandler;
private static class PollingMessageHandler extends Handler {
private final WeakReference<InputManagerV9> mInputManager;
PollingMessageHandler(InputManagerV9 im) {
mInputManager = new WeakReference<InputManagerV9>(im);
}
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
switch (msg.what) {
case MESSAGE_TEST_FOR_DISCONNECT:
InputManagerV9 imv = mInputManager.get();
if (null != imv) {
long time = SystemClock.elapsedRealtime();
int size = imv.mDevices.size();
for (int i = 0; i < size; i++) {
long[] lastContact = imv.mDevices.valueAt(i);
if (null != lastContact) {
if (time - lastContact[0] > CHECK_ELAPSED_TIME) {
// check to see if the device has been
// disconnected
int id = imv.mDevices.keyAt(i);
if (null == InputDevice.getDevice(id)) {
// disconnected!
imv.notifyListeners(ON_DEVICE_REMOVED, id);
imv.mDevices.remove(id);
} else {
lastContact[0] = time;
}
}
}
}
sendEmptyMessageDelayed(MESSAGE_TEST_FOR_DISCONNECT,
CHECK_ELAPSED_TIME);
}
break;
}
}
}
public InputManagerV9() {
mDevices = new SparseArray<long[]>();
mListeners = new HashMap<InputDeviceListener, Handler>();
mDefaultHandler = new PollingMessageHandler(this);
// as a side-effect, populates our collection of watched
// input devices
getInputDeviceIds();
}
@Override
public InputDevice getInputDevice(int id) {
return InputDevice.getDevice(id);
}
@Override
public int[] getInputDeviceIds() {
// add any hitherto unknown devices to our
// collection of watched input devices
int[] activeDevices = InputDevice.getDeviceIds();
long time = SystemClock.elapsedRealtime();
for (int id : activeDevices) {
long[] lastContact = mDevices.get(id);
if (null == lastContact) {
// we have a new device
mDevices.put(id, new long[] { time });
}
}
return activeDevices;
}
@Override
public void registerInputDeviceListener(InputDeviceListener listener, Handler handler) {
mListeners.remove(listener);
if (handler == null) {
handler = mDefaultHandler;
}
mListeners.put(listener, handler);
}
@Override
public void unregisterInputDeviceListener(InputDeviceListener listener) {
mListeners.remove(listener);
}
private void notifyListeners(int why, int deviceId) {
// the state of some device has changed
if (!mListeners.isEmpty()) {
// yes... this will cause an object to get created... hopefully
// it won't happen very often
for (InputDeviceListener listener : mListeners.keySet()) {
Handler handler = mListeners.get(listener);
DeviceEvent odc = DeviceEvent.getDeviceEvent(why, deviceId, listener);
handler.post(odc);
}
}
}
private static class DeviceEvent implements Runnable {
private int mMessageType;
private int mId;
private InputDeviceListener mListener;
private static Queue<DeviceEvent> sEventQueue = new ArrayDeque<DeviceEvent>();
private DeviceEvent() {
}
static DeviceEvent getDeviceEvent(int messageType, int id,
InputDeviceListener listener) {
DeviceEvent curChanged = sEventQueue.poll();
if (null == curChanged) {
curChanged = new DeviceEvent();
}
curChanged.mMessageType = messageType;
curChanged.mId = id;
curChanged.mListener = listener;
return curChanged;
}
@Override
public void run() {
switch (mMessageType) {
case ON_DEVICE_ADDED:
mListener.onInputDeviceAdded(mId);
break;
case ON_DEVICE_CHANGED:
mListener.onInputDeviceChanged(mId);
break;
case ON_DEVICE_REMOVED:
mListener.onInputDeviceRemoved(mId);
break;
default:
Log.e(LOG_TAG, "Unknown Message Type");
break;
}
// dump this runnable back in the queue
sEventQueue.offer(this);
}
}
@Override
public void onGenericMotionEvent(MotionEvent event) {
// detect new devices
int id = event.getDeviceId();
long[] timeArray = mDevices.get(id);
if (null == timeArray) {
notifyListeners(ON_DEVICE_ADDED, id);
timeArray = new long[1];
mDevices.put(id, timeArray);
}
long time = SystemClock.elapsedRealtime();
timeArray[0] = time;
}
@Override
public void onPause() {
mDefaultHandler.removeMessages(MESSAGE_TEST_FOR_DISCONNECT);
}
@Override
public void onResume() {
mDefaultHandler.sendEmptyMessage(MESSAGE_TEST_FOR_DISCONNECT);
}
}
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