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/**
* Copyright (C) 2018,2020 The LineageOS 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.lineageos.internal.buttons;
import android.content.ContentResolver;
import android.content.Context;
import android.content.res.Resources;
import android.database.ContentObserver;
import android.media.AudioManager;
import android.media.session.MediaController;
import android.media.session.MediaSessionLegacyHelper;
import android.media.session.MediaSessionManager;
import android.media.session.PlaybackState;
import android.os.Handler;
import android.os.Message;
import android.os.UserHandle;
import android.util.Slog;
import android.view.KeyEvent;
import android.view.ViewConfiguration;
import lineageos.providers.LineageSettings;
import java.util.List;
public final class LineageButtons {
private final String TAG = "LineageButtons";
private final boolean DEBUG = false;
private static final int MSG_DISPATCH_VOLKEY_WITH_WAKELOCK = 1;
private final Context mContext;
private final ButtonHandler mHandler;
private final MediaSessionManager mMediaSessionManager;
private boolean mIsLongPress = false;
private boolean mVolBtnMusicControls = false;
private class ButtonHandler extends Handler {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_DISPATCH_VOLKEY_WITH_WAKELOCK:
KeyEvent ev = (KeyEvent) msg.obj;
mIsLongPress = true;
if (DEBUG) {
Slog.d(TAG, "Dispatching key to audio service");
}
onSkipTrackEvent(ev);
break;
}
}
}
public LineageButtons(Context context) {
mContext = context;
mHandler = new ButtonHandler();
mMediaSessionManager = mContext.getSystemService(MediaSessionManager.class);
SettingsObserver observer = new SettingsObserver(new Handler());
observer.observe();
}
public boolean handleVolumeKey(KeyEvent event, boolean isInteractive) {
final boolean down = event.getAction() == KeyEvent.ACTION_DOWN;
final int keyCode = event.getKeyCode();
if (isInteractive) {
// nothing to do here for now
if (DEBUG) {
Slog.d(TAG, "Skipping because interactive");
}
return false;
}
switch (keyCode) {
case KeyEvent.KEYCODE_VOLUME_DOWN:
case KeyEvent.KEYCODE_VOLUME_UP:
if (!mVolBtnMusicControls) {
return false;
}
if (down) {
mIsLongPress = false;
// queue skip event
int newKeyCode = (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN
? KeyEvent.KEYCODE_MEDIA_PREVIOUS
: KeyEvent.KEYCODE_MEDIA_NEXT);
KeyEvent newEvent = new KeyEvent(event.getDownTime(), event.getEventTime(),
event.getAction(), newKeyCode, 0);
if (DEBUG) {
Slog.d(TAG, "Queueing media " +
(keyCode == KeyEvent.KEYCODE_VOLUME_DOWN ? "previous" : "next") +
" event " + newEvent);
}
Message msg = mHandler.obtainMessage(MSG_DISPATCH_VOLKEY_WITH_WAKELOCK,
newEvent);
msg.setAsynchronous(true);
mHandler.sendMessageDelayed(msg, ViewConfiguration.getLongPressTimeout());
} else {
// cancel skip event
mHandler.removeMessages(MSG_DISPATCH_VOLKEY_WITH_WAKELOCK);
if (mIsLongPress) {
// if key was long pressed, media next/prev action has been performed,
// so don't change volume
break;
}
// sendVolumeKeyEvent will only change the volume on ACTION_DOWN,
// so fake the ACTION_DOWN event.
KeyEvent newEvent = new KeyEvent(KeyEvent.ACTION_DOWN, keyCode);
MediaSessionLegacyHelper.getHelper(mContext).sendVolumeKeyEvent(newEvent,
AudioManager.USE_DEFAULT_STREAM_TYPE, true);
}
break;
default:
// key unhandled
return false;
}
return true;
}
private void triggerKeyEvents(KeyEvent evDown, MediaController controller) {
final KeyEvent evUp = KeyEvent.changeAction(evDown, KeyEvent.ACTION_UP);
mHandler.post(() -> controller.dispatchMediaButtonEvent(evDown));
mHandler.postDelayed(() -> controller.dispatchMediaButtonEvent(evUp), 20);
}
public void onSkipTrackEvent(KeyEvent ev) {
if (mMediaSessionManager != null) {
final List<MediaController> sessions = mMediaSessionManager.getActiveSessionsForUser(
null, UserHandle.USER_ALL);
for (MediaController mediaController : sessions) {
if (PlaybackState.STATE_PLAYING ==
getMediaControllerPlaybackState(mediaController)) {
triggerKeyEvents(ev, mediaController);
break;
}
}
}
}
private int getMediaControllerPlaybackState(MediaController controller) {
if (controller != null) {
final PlaybackState playbackState = controller.getPlaybackState();
if (playbackState != null) {
return playbackState.getState();
}
}
return PlaybackState.STATE_NONE;
}
class SettingsObserver extends ContentObserver {
SettingsObserver(Handler handler) {
super(handler);
}
void observe() {
ContentResolver resolver = mContext.getContentResolver();
resolver.registerContentObserver(LineageSettings.System.getUriFor(
LineageSettings.System.VOLBTN_MUSIC_CONTROLS),
false, this, UserHandle.USER_ALL);
update();
}
@Override
public void onChange(boolean selfChange) {
update();
}
private void update() {
ContentResolver resolver = mContext.getContentResolver();
Resources res = mContext.getResources();
mVolBtnMusicControls = LineageSettings.System.getIntForUser(
resolver, LineageSettings.System.VOLBTN_MUSIC_CONTROLS, 1,
UserHandle.USER_CURRENT) == 1;
if (DEBUG) {
Slog.d(TAG, "music controls enabled = " + mVolBtnMusicControls);
}
}
}
}
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