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/*
* Copyright (C) 2017 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 com.android.car.media.drawer;
import android.content.Context;
import android.graphics.PorterDuff;
import android.graphics.drawable.Drawable;
import android.media.MediaDescription;
import android.media.browse.MediaBrowser;
import android.media.session.MediaSession;
import android.util.Log;
import androidx.car.drawer.DrawerItemViewHolder;
import com.android.car.media.MediaPlaybackModel;
import com.android.car.media.R;
import java.util.ArrayList;
import java.util.List;
/**
* {@link MediaItemsFetcher} implementation that fetches items from a specific {@link MediaBrowser}
* node.
* <p>
* It optionally supports surfacing the Media app's queue as the last item.
*/
class MediaBrowserItemsFetcher implements MediaItemsFetcher {
private static final String TAG = "Media.BrowserFetcher";
/**
* An id that can be returned from {@link MediaBrowser.MediaItem#getMediaId()} to indicate that
* a {@link android.media.browse.MediaBrowser.MediaItem} representing the play queue has been
* clicked.
*/
static final String PLAY_QUEUE_MEDIA_ID = "com.android.car.media.drawer.PLAY_QUEUE";
private final Context mContext;
private final MediaPlaybackModel mMediaPlaybackModel;
private final String mMediaId;
private final boolean mShowQueueItem;
private final MediaItemOnClickListener mItemClickListener;
private ItemsUpdatedCallback mCallback;
private List<MediaBrowser.MediaItem> mItems = new ArrayList<>();
private boolean mQueueAvailable;
MediaBrowserItemsFetcher(Context context, MediaPlaybackModel model,
MediaItemOnClickListener listener, String mediaId, boolean showQueueItem) {
mContext = context;
mMediaPlaybackModel = model;
mItemClickListener = listener;
mMediaId = mediaId;
mShowQueueItem = showQueueItem;
}
@Override
public void start(ItemsUpdatedCallback callback) {
mCallback = callback;
updateQueueAvailability();
if (mMediaPlaybackModel.isConnected()) {
mMediaPlaybackModel.getMediaBrowser().subscribe(mMediaId, mSubscriptionCallback);
} else {
mItems.clear();
callback.onItemsUpdated();
}
mMediaPlaybackModel.addListener(mModelListener);
}
private final MediaPlaybackModel.Listener mModelListener =
new MediaPlaybackModel.AbstractListener() {
@Override
public void onQueueChanged(List<MediaSession.QueueItem> queue) {
updateQueueAvailability();
}
@Override
public void onSessionDestroyed(CharSequence destroyedMediaClientName) {
updateQueueAvailability();
}
@Override
public void onMediaConnectionSuspended() {
if (mCallback != null) {
mCallback.onItemsUpdated();
}
}
};
private final MediaBrowser.SubscriptionCallback mSubscriptionCallback =
new MediaBrowser.SubscriptionCallback() {
@Override
public void onChildrenLoaded(String parentId, List<MediaBrowser.MediaItem> children) {
mItems.clear();
mItems.addAll(children);
mCallback.onItemsUpdated();
}
@Override
public void onError(String parentId) {
mItems.clear();
mCallback.onItemsUpdated();
}
};
private void updateQueueAvailability() {
if (mShowQueueItem && !mMediaPlaybackModel.getQueue().isEmpty()) {
mQueueAvailable = true;
}
}
@Override
public int getItemCount() {
int size = mItems.size();
if (mQueueAvailable) {
size++;
}
return size;
}
@Override
public boolean usesSmallLayout(int position) {
if (mQueueAvailable && position == mItems.size()) {
return true;
}
return MediaItemsFetcher.usesSmallLayout(mItems.get(position).getDescription());
}
@Override
public void populateViewHolder(DrawerItemViewHolder holder, int position) {
if (mQueueAvailable && position == mItems.size()) {
holder.getTitle().setText(mMediaPlaybackModel.getQueueTitle());
return;
}
MediaBrowser.MediaItem item = mItems.get(position);
MediaItemsFetcher.populateViewHolderFrom(holder, item.getDescription());
if (holder.getEndIcon() == null) {
return;
}
if (item.isBrowsable()) {
int iconColor = mContext.getColor(R.color.car_tint);
Drawable drawable = mContext.getDrawable(R.drawable.ic_chevron_right);
drawable.setColorFilter(iconColor, PorterDuff.Mode.SRC_IN);
holder.getEndIcon().setImageDrawable(drawable);
} else {
holder.getEndIcon().setImageDrawable(null);
}
}
@Override
public void onItemClick(int position) {
if (mItemClickListener == null) {
return;
}
MediaBrowser.MediaItem item = mQueueAvailable && position == mItems.size()
? createPlayQueueMediaItem()
: mItems.get(position);
mItemClickListener.onMediaItemClicked(item);
}
/**
* Creates and returns a {@link android.media.browse.MediaBrowser.MediaItem} that represents an
* entry for the play queue. A play queue media item will have a media id of
* {@link #PLAY_QUEUE_MEDIA_ID} and is {@link MediaBrowser.MediaItem#FLAG_BROWSABLE}.
*/
private MediaBrowser.MediaItem createPlayQueueMediaItem() {
MediaDescription description = new MediaDescription.Builder()
.setMediaId(PLAY_QUEUE_MEDIA_ID)
.setTitle(mMediaPlaybackModel.getQueueTitle())
.build();
return new MediaBrowser.MediaItem(description, MediaBrowser.MediaItem.FLAG_BROWSABLE);
}
@Override
public void cleanup() {
mMediaPlaybackModel.removeListener(mModelListener);
mMediaPlaybackModel.getMediaBrowser().unsubscribe(mMediaId);
mCallback = null;
}
@Override
public int getScrollPosition() {
return MediaItemsFetcher.DONT_SCROLL;
}
}
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