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/*
* Copyright (C) 2020 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 android.hardware.input;
import android.annotation.CallbackExecutor;
import android.annotation.NonNull;
import android.app.ActivityThread;
import android.content.Context;
import android.hardware.vibrator.IVibrator;
import android.os.Binder;
import android.os.IVibratorStateListener;
import android.os.VibrationAttributes;
import android.os.VibrationEffect;
import android.os.Vibrator;
import android.os.VibratorInfo;
import android.util.ArrayMap;
import android.util.Log;
import com.android.internal.annotations.GuardedBy;
import com.android.internal.util.Preconditions;
import java.util.concurrent.Executor;
/**
* Vibrator implementation that communicates with the input device vibrators.
*/
final class InputDeviceVibrator extends Vibrator {
private static final String TAG = "InputDeviceVibrator";
// mDeviceId represents InputDevice ID the vibrator belongs to
private final int mDeviceId;
private final VibratorInfo mVibratorInfo;
private final Binder mToken;
private final InputManager mInputManager;
@GuardedBy("mDelegates")
private final ArrayMap<OnVibratorStateChangedListener,
OnVibratorStateChangedListenerDelegate> mDelegates = new ArrayMap<>();
InputDeviceVibrator(InputManager inputManager, int deviceId, int vibratorId) {
mInputManager = inputManager;
mDeviceId = deviceId;
mVibratorInfo = new VibratorInfo.Builder(vibratorId)
.setCapabilities(IVibrator.CAP_AMPLITUDE_CONTROL)
// The supported effect and braking lists are known to be empty for input devices,
// which is different from not being set (that means the device support is unknown).
.setSupportedEffects(new int[0])
.setSupportedBraking(new int[0])
.build();
mToken = new Binder();
}
private class OnVibratorStateChangedListenerDelegate extends
IVibratorStateListener.Stub {
private final Executor mExecutor;
private final OnVibratorStateChangedListener mListener;
OnVibratorStateChangedListenerDelegate(@NonNull OnVibratorStateChangedListener listener,
@NonNull Executor executor) {
mExecutor = executor;
mListener = listener;
}
@Override
public void onVibrating(boolean isVibrating) {
mExecutor.execute(() -> mListener.onVibratorStateChanged(isVibrating));
}
}
@Override
protected VibratorInfo getInfo() {
return mVibratorInfo;
}
@Override
public boolean hasVibrator() {
return true;
}
@Override
public boolean isVibrating() {
return mInputManager.isVibrating(mDeviceId);
}
/**
* Adds a listener for vibrator state changes. Callbacks will be executed on the main thread.
* If the listener was previously added and not removed, this call will be ignored.
*
* @param listener listener to be added
*/
@Override
public void addVibratorStateListener(@NonNull OnVibratorStateChangedListener listener) {
Preconditions.checkNotNull(listener);
Context context = ActivityThread.currentApplication();
addVibratorStateListener(context.getMainExecutor(), listener);
}
/**
* Adds a listener for vibrator state change. If the listener was previously added and not
* removed, this call will be ignored.
*
* @param listener Listener to be added.
* @param executor The {@link Executor} on which the listener's callbacks will be executed on.
*/
@Override
public void addVibratorStateListener(
@NonNull @CallbackExecutor Executor executor,
@NonNull OnVibratorStateChangedListener listener) {
Preconditions.checkNotNull(listener);
Preconditions.checkNotNull(executor);
synchronized (mDelegates) {
// If listener is already registered, reject and return.
if (mDelegates.containsKey(listener)) {
Log.w(TAG, "Listener already registered.");
return;
}
final OnVibratorStateChangedListenerDelegate delegate =
new OnVibratorStateChangedListenerDelegate(listener, executor);
if (!mInputManager.registerVibratorStateListener(mDeviceId, delegate)) {
Log.w(TAG, "Failed to register vibrate state listener");
return;
}
mDelegates.put(listener, delegate);
}
}
/**
* Removes the listener for vibrator state changes. If the listener was not previously
* registered, this call will do nothing.
*
* @param listener Listener to be removed.
*/
@Override
public void removeVibratorStateListener(@NonNull OnVibratorStateChangedListener listener) {
Preconditions.checkNotNull(listener);
synchronized (mDelegates) {
// Check if the listener is registered, otherwise will return.
if (mDelegates.containsKey(listener)) {
final OnVibratorStateChangedListenerDelegate delegate = mDelegates.get(listener);
if (!mInputManager.unregisterVibratorStateListener(mDeviceId, delegate)) {
Log.w(TAG, "Failed to unregister vibrate state listener");
return;
}
mDelegates.remove(listener);
}
}
}
@Override
public boolean hasAmplitudeControl() {
return mVibratorInfo.hasCapability(IVibrator.CAP_AMPLITUDE_CONTROL);
}
/**
* @hide
*/
@Override
public void vibrate(int uid, String opPkg, @NonNull VibrationEffect effect, String reason,
@NonNull VibrationAttributes attributes) {
mInputManager.vibrate(mDeviceId, effect, mToken);
}
@Override
public void cancel() {
mInputManager.cancelVibrate(mDeviceId, mToken);
}
@Override
public void cancel(int usageFilter) {
cancel();
}
}
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