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BackgroundedPlugin.java
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BackgroundedPlugin.java
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/*******************************************************************************
* Copyright 2013 Chris Rhoden, Rebecca Nesson, Public Radio Exchange
*
* 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.prx.playerhater.plugins;
import android.app.PendingIntent;
import android.content.Context;
import android.net.Uri;
import android.os.Handler;
import android.os.Handler.Callback;
import android.os.HandlerThread;
import android.os.Looper;
import android.os.Message;
import org.prx.playerhater.PlayerHater;
import org.prx.playerhater.PlayerHaterPlugin;
import org.prx.playerhater.Song;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
public class BackgroundedPlugin extends HandlerThread implements
PlayerHaterPlugin, Callback {
private static final int SONG_CHANGED = 0;
private static final int DURATION_CHANGED = 1;
private static final int NEXT_TRACK_UNAVAILABLE = 2;
private static final int NEXT_TRACK_AVAILABLE = 3;
private static final int ART_CHANGED_URI = 4;
private static final int ALBUM_CHANGED = 5;
private static final int ARTIST_CHANGED = 6;
private static final int TITLE_CHANGED = 7;
private static final int PLAYBACK_STOPPED = 8;
private static final int PLAYBACK_STARTED = 9;
private static final int PLAYBACK_RESUMED = 10;
private static final int PLAYBACK_PAUSED = 11;
private static final int AUDIO_LOADING = 12;
private static final int INTENT_CHANGED = 13;
private static final int SONG_FINISHED = 14;
private static final int SERVICE_BOUND = 15;
private static final int PLAYER_HATER_LOADED = 16;
private static final int SERVICE_STOPPING = 17;
private static final int CHANGES_COMPLETE = 18;
private static final int TRANSPORT_CONTROL_FLAGS_CHANGED = 19;
private static final int CHANGES_COMPLETE_INTERNAL = -1;
private static final Integer[] DEFAULT_FOREGROUND_ACTIONS = {
CHANGES_COMPLETE, SERVICE_BOUND, PLAYER_HATER_LOADED,
SERVICE_STOPPING };
private final PlayerHaterPlugin mPlugin;
private final Set<Integer> mForegroundActions;
private TargetableHandler mHandler;
public BackgroundedPlugin(PlayerHaterPlugin plugin) {
this(plugin, DEFAULT_FOREGROUND_ACTIONS);
}
public BackgroundedPlugin(PlayerHaterPlugin plugin,
Integer... foregroundActions) {
this(plugin, Looper.getMainLooper(), foregroundActions);
}
public BackgroundedPlugin(PlayerHaterPlugin plugin,
Looper foregroundLooper, Integer... foregroundActions) {
super("BackgroundedPlugin");
mPlugin = plugin;
mForegroundActions = new HashSet<Integer>(
Arrays.asList(foregroundActions));
start();
mHandler = new HandlerPair(this, mForegroundActions, foregroundLooper);
}
@Override
public void onPlayerHaterLoaded(Context context, PlayerHater playerHater) {
if (shouldHandleMessage(PLAYER_HATER_LOADED)) {
mPlugin.onPlayerHaterLoaded(context, playerHater);
} else {
mHandler.obtainTargettedMessage(PLAYER_HATER_LOADED,
new LoadedObject(context, playerHater)).sendToTarget();
}
}
@Override
public void onSongChanged(Song song) {
mHandler.removeTargettedMessages(CHANGES_COMPLETE_INTERNAL);
if (shouldHandleMessage(SONG_CHANGED)) {
mPlugin.onSongChanged(song);
} else {
mHandler.obtainTargettedMessage(SONG_CHANGED, song).sendToTarget();
}
mHandler.sendTargettedEmptyMessage(CHANGES_COMPLETE_INTERNAL);
}
@Override
public void onDurationChanged(int duration) {
mHandler.removeTargettedMessages(CHANGES_COMPLETE_INTERNAL);
if (shouldHandleMessage(DURATION_CHANGED)) {
mPlugin.onDurationChanged(duration);
} else {
mHandler.obtainTargettedMessage(DURATION_CHANGED, duration)
.sendToTarget();
}
mHandler.sendTargettedEmptyMessage(CHANGES_COMPLETE_INTERNAL);
}
@Override
public void onAudioLoading() {
mHandler.removeTargettedMessages(CHANGES_COMPLETE_INTERNAL);
if (shouldHandleMessage(AUDIO_LOADING)) {
mPlugin.onAudioLoading();
} else {
mHandler.sendTargettedEmptyMessage(AUDIO_LOADING);
}
mHandler.sendTargettedEmptyMessage(CHANGES_COMPLETE_INTERNAL);
}
@Override
public void onAudioPaused() {
mHandler.removeTargettedMessages(CHANGES_COMPLETE_INTERNAL);
if (shouldHandleMessage(PLAYBACK_PAUSED)) {
mPlugin.onAudioPaused();
} else {
mHandler.sendTargettedEmptyMessage(PLAYBACK_PAUSED);
}
mHandler.sendTargettedEmptyMessage(CHANGES_COMPLETE_INTERNAL);
}
@Override
public void onAudioResumed() {
mHandler.removeTargettedMessages(CHANGES_COMPLETE_INTERNAL);
if (shouldHandleMessage(PLAYBACK_RESUMED)) {
mPlugin.onAudioResumed();
} else {
mHandler.sendTargettedEmptyMessage(PLAYBACK_RESUMED);
}
mHandler.sendTargettedEmptyMessage(CHANGES_COMPLETE_INTERNAL);
}
@Override
public void onAudioStarted() {
mHandler.removeTargettedMessages(CHANGES_COMPLETE_INTERNAL);
if (shouldHandleMessage(PLAYBACK_STARTED)) {
mPlugin.onAudioStarted();
} else {
mHandler.sendTargettedEmptyMessage(PLAYBACK_STARTED);
}
mHandler.sendTargettedEmptyMessage(CHANGES_COMPLETE_INTERNAL);
}
@Override
public void onAudioStopped() {
mHandler.removeTargettedMessages(CHANGES_COMPLETE_INTERNAL);
if (shouldHandleMessage(PLAYBACK_STOPPED)) {
mPlugin.onAudioStopped();
} else {
mHandler.sendTargettedEmptyMessage(PLAYBACK_STOPPED);
}
mHandler.sendTargettedEmptyMessage(CHANGES_COMPLETE_INTERNAL);
}
@Override
public void onTitleChanged(String title) {
mHandler.removeTargettedMessages(CHANGES_COMPLETE_INTERNAL);
if (shouldHandleMessage(TITLE_CHANGED)) {
mPlugin.onTitleChanged(title);
} else {
mHandler.obtainTargettedMessage(TITLE_CHANGED, title)
.sendToTarget();
}
mHandler.sendTargettedEmptyMessage(CHANGES_COMPLETE_INTERNAL);
}
@Override
public void onAlbumTitleChanged(String title) {
mHandler.removeTargettedMessages(CHANGES_COMPLETE_INTERNAL);
if (shouldHandleMessage(ALBUM_CHANGED)) {
mPlugin.onAlbumTitleChanged(title);
} else {
mHandler.obtainTargettedMessage(ALBUM_CHANGED, title)
.sendToTarget();
}
mHandler.sendTargettedEmptyMessage(CHANGES_COMPLETE_INTERNAL);
}
@Override
public void onArtistChanged(String artist) {
mHandler.removeTargettedMessages(CHANGES_COMPLETE_INTERNAL);
if (shouldHandleMessage(ARTIST_CHANGED)) {
mPlugin.onArtistChanged(artist);
} else {
mHandler.obtainTargettedMessage(ARTIST_CHANGED, artist)
.sendToTarget();
}
mHandler.sendTargettedEmptyMessage(CHANGES_COMPLETE_INTERNAL);
}
@Override
public void onAlbumArtChanged(Uri url) {
mHandler.removeTargettedMessages(CHANGES_COMPLETE_INTERNAL);
if (shouldHandleMessage(ART_CHANGED_URI)) {
mPlugin.onAlbumArtChanged(url);
} else {
mHandler.obtainTargettedMessage(ART_CHANGED_URI, url)
.sendToTarget();
}
mHandler.sendTargettedEmptyMessage(CHANGES_COMPLETE_INTERNAL);
}
@Override
public void onNextSongAvailable(Song nextTrack) {
mHandler.removeTargettedMessages(CHANGES_COMPLETE_INTERNAL);
if (shouldHandleMessage(NEXT_TRACK_AVAILABLE)) {
mPlugin.onNextSongAvailable(nextTrack);
} else {
mHandler.obtainTargettedMessage(NEXT_TRACK_AVAILABLE, nextTrack)
.sendToTarget();
}
mHandler.sendTargettedEmptyMessage(CHANGES_COMPLETE_INTERNAL);
}
@Override
public void onNextSongUnavailable() {
mHandler.removeTargettedMessages(CHANGES_COMPLETE_INTERNAL);
if (shouldHandleMessage(NEXT_TRACK_UNAVAILABLE)) {
mPlugin.onNextSongUnavailable();
} else {
mHandler.sendTargettedEmptyMessage(NEXT_TRACK_UNAVAILABLE);
}
mHandler.sendTargettedEmptyMessage(CHANGES_COMPLETE_INTERNAL);
}
@Override
public void onPendingIntentChanged(PendingIntent pending) {
mHandler.removeTargettedMessages(CHANGES_COMPLETE_INTERNAL);
if (shouldHandleMessage(INTENT_CHANGED)) {
mPlugin.onPendingIntentChanged(pending);
} else {
mHandler.obtainTargettedMessage(INTENT_CHANGED, pending)
.sendToTarget();
}
mHandler.sendTargettedEmptyMessage(CHANGES_COMPLETE_INTERNAL);
}
@Override
public void onSongFinished(Song song, int reason) {
mHandler.removeTargettedMessages(CHANGES_COMPLETE_INTERNAL);
if (shouldHandleMessage(SONG_FINISHED)) {
mPlugin.onSongFinished(song, reason);
} else {
mHandler.obtainTargettedMessage(SONG_FINISHED, reason, 0, song)
.sendToTarget();
}
mHandler.sendTargettedEmptyMessage(CHANGES_COMPLETE_INTERNAL);
}
@Override
public void onTransportControlFlagsChanged(int transportControlFlags) {
mHandler.removeTargettedMessages(CHANGES_COMPLETE_INTERNAL);
if (shouldHandleMessage(TRANSPORT_CONTROL_FLAGS_CHANGED)) {
mPlugin.onTransportControlFlagsChanged(transportControlFlags);
} else {
mHandler.obtainTargettedMessage(TRANSPORT_CONTROL_FLAGS_CHANGED,
transportControlFlags, 0).sendToTarget();
}
mHandler.sendTargettedEmptyMessage(CHANGES_COMPLETE_INTERNAL);
}
private boolean shouldHandleMessage(int messageId) {
return false;
// No. return ((Looper.myLooper() == mLooper) &&
// mForegroundActions.contains(messageId));
}
@Override
public void onChangesComplete() {
// This is automatically handled by the thing.
}
@Override
public boolean handleMessage(Message msg) {
switch (msg.what) {
case CHANGES_COMPLETE_INTERNAL:
if (!mHandler.hasTargettedMessages(CHANGES_COMPLETE)) {
mHandler.sendTargettedEmptyMessage(CHANGES_COMPLETE);
}
break;
case SONG_CHANGED:
mPlugin.onSongChanged((Song) msg.obj);
break;
case DURATION_CHANGED:
mPlugin.onDurationChanged((Integer) msg.obj);
break;
case NEXT_TRACK_UNAVAILABLE:
mPlugin.onNextSongUnavailable();
break;
case NEXT_TRACK_AVAILABLE:
mPlugin.onNextSongAvailable((Song) msg.obj);
break;
case ART_CHANGED_URI:
mPlugin.onAlbumArtChanged((Uri) msg.obj);
break;
case ALBUM_CHANGED:
mPlugin.onAlbumTitleChanged((String) msg.obj);
break;
case ARTIST_CHANGED:
mPlugin.onArtistChanged((String) msg.obj);
break;
case TITLE_CHANGED:
mPlugin.onTitleChanged((String) msg.obj);
break;
case PLAYBACK_STOPPED:
mPlugin.onAudioStopped();
break;
case PLAYBACK_STARTED:
mPlugin.onAudioStarted();
break;
case PLAYBACK_RESUMED:
mPlugin.onAudioResumed();
break;
case PLAYBACK_PAUSED:
mPlugin.onAudioPaused();
break;
case AUDIO_LOADING:
mPlugin.onAudioLoading();
break;
case INTENT_CHANGED:
mPlugin.onPendingIntentChanged((PendingIntent) msg.obj);
break;
case SONG_FINISHED:
mPlugin.onSongFinished((Song) msg.obj, msg.arg1);
break;
case PLAYER_HATER_LOADED:
LoadedObject o = (LoadedObject) msg.obj;
mPlugin.onPlayerHaterLoaded(o.context, o.playerHater);
break;
case TRANSPORT_CONTROL_FLAGS_CHANGED:
mPlugin.onTransportControlFlagsChanged(msg.arg1);
break;
case CHANGES_COMPLETE:
mPlugin.onChangesComplete();
break;
default:
return false;
}
return true;
}
private static class LoadedObject {
public final Context context;
public final PlayerHater playerHater;
public LoadedObject(Context context, PlayerHater playerHater) {
this.context = context;
this.playerHater = playerHater;
}
}
private static class TargetableHandler extends Handler {
public TargetableHandler() {
super();
}
@SuppressWarnings("unused")
public Message obtainTargettedMessage(int what) {
return obtainMessage(what);
}
public Message obtainTargettedMessage(int what, Object obj) {
return obtainMessage(what, obj);
}
public Message obtainTargettedMessage(int what, int arg1, int arg2) {
return obtainMessage(what, arg1, arg2);
}
public Message obtainTargettedMessage(int what, int arg1, int arg2,
Object obj) {
return obtainMessage(what, arg1, arg2, obj);
}
public boolean sendTargettedEmptyMessage(int what) {
return sendEmptyMessage(what);
}
public void removeTargettedMessages(int what) {
removeMessages(what);
}
public boolean hasTargettedMessages(int what) {
return hasMessages(what);
}
}
private static class HandlerPair extends TargetableHandler {
private final Callback mCallback;
private final OtherHandler mOtherHandler;
private final Set<Integer> mOtherActions;
private HandlerPair(Callback callback, Set<Integer> otherLooperActions,
Looper otherLooper) {
super();
mCallback = callback;
mOtherActions = otherLooperActions;
mOtherHandler = new OtherHandler(otherLooper, this);
}
@Override
public Message obtainTargettedMessage(int what) {
if (mOtherActions.contains(what)) {
return mOtherHandler.obtainMessage(what);
}
return obtainMessage(what);
}
@Override
public Message obtainTargettedMessage(int what, Object obj) {
if (mOtherActions.contains(what)) {
return mOtherHandler.obtainMessage(what, obj);
}
return obtainMessage(what, obj);
}
@Override
public Message obtainTargettedMessage(int what, int arg1, int arg2) {
if (mOtherActions.contains(what)) {
return mOtherHandler.obtainMessage(what, arg1, arg2);
}
return obtainMessage(what, arg1, arg2);
}
@Override
public Message obtainTargettedMessage(int what, int arg1, int arg2,
Object obj) {
if (mOtherActions.contains(what)) {
return mOtherHandler.obtainMessage(what, arg1, arg2, obj);
}
return obtainMessage(what, arg1, arg2, obj);
}
@Override
public boolean sendTargettedEmptyMessage(int what) {
if (mOtherActions.contains(what)) {
return mOtherHandler.sendEmptyMessage(what);
}
return sendEmptyMessage(what);
}
@Override
public void handleMessage(Message msg) {
handleMessage(msg, false);
}
@Override
public void removeTargettedMessages(int what) {
if (mOtherActions.contains(what)) {
mOtherHandler.removeMessages(what);
} else {
removeMessages(what);
}
}
@Override
public boolean hasTargettedMessages(int what) {
if (mOtherActions.contains(what)) {
return mOtherHandler.hasMessages(what);
}
return hasMessages(what);
}
public void handleMessage(Message msg, boolean inverted) {
if ((inverted && !mOtherActions.contains(msg.what))
|| (!inverted && mOtherActions.contains(msg.what))) {
Message newMessage = obtainTargettedMessage(msg.what);
newMessage.copyFrom(msg);
newMessage.sendToTarget();
} else {
mCallback.handleMessage(msg);
}
}
static class OtherHandler extends Handler {
private final HandlerPair mHandler;
private OtherHandler(Looper looper, HandlerPair handler) {
super(looper);
mHandler = handler;
}
@Override
public void handleMessage(Message msg) {
mHandler.handleMessage(msg, true);
}
}
}
}