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package com.android.car.media;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.view.View;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.TextView;
import com.android.car.media.common.MediaItemMetadata;
import com.android.car.media.common.PlaybackModel;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
/**
* Common controller for displaying current track's metadata.
*/
public class MetadataController {
private static final DateFormat TIME_FORMAT = new SimpleDateFormat("m:ss", Locale.US);
@NonNull
private final TextView mTitle;
@NonNull
private final TextView mSubtitle;
@Nullable
private final TextView mTime;
@NonNull
private final SeekBar mSeekBar;
@Nullable
private final ImageView mAlbumArt;
@Nullable
private PlaybackModel mModel;
private boolean mUpdatesPaused;
private boolean mNeedsMetadataUpdate;
private int mAlbumArtSize;
private final PlaybackModel.PlaybackObserver mPlaybackObserver =
new PlaybackModel.PlaybackObserver() {
@Override
public void onPlaybackStateChanged() {
updateState();
}
@Override
public void onSourceChanged() {
updateState();
updateMetadata();
}
@Override
public void onMetadataChanged() {
updateMetadata();
}
};
/**
* Create a new MetadataController that operates on the provided Views
* @param title Displays the track's title. Must not be {@code null}.
* @param subtitle Displays the track's artist. Must not be {@code null}.
* @param time Displays the track's progress as text. May be {@code null}.
* @param seekBar Displays the track's progress visually. Must not be {@code null}.
* @param albumArt Displays the track's album art. May be {@code null}.
*/
public MetadataController(@NonNull TextView title, @NonNull TextView subtitle,
@Nullable TextView time, @NonNull SeekBar seekBar, @Nullable ImageView albumArt) {
mTitle = title;
mSubtitle = subtitle;
mTime = time;
mSeekBar = seekBar;
mSeekBar.setOnTouchListener((view, event) -> true);
mAlbumArt = albumArt;
mAlbumArtSize = title.getContext().getResources()
.getDimensionPixelSize(R.dimen.playback_album_art_size_large);
}
/**
* Registers the {@link PlaybackModel} this widget will use to follow playback state.
* Consumers of this class must unregister the {@link PlaybackModel} by calling this method with
* null.
*
* @param model {@link PlaybackModel} to subscribe, or null to unsubscribe.
*/
public void setModel(@Nullable PlaybackModel model) {
if (mModel != null) {
mModel.unregisterObserver(mPlaybackObserver);
}
mModel = model;
if (mModel != null) {
mModel.registerObserver(mPlaybackObserver);
}
}
private void updateState() {
updateProgress();
mSeekBar.removeCallbacks(mSeekBarRunnable);
if (mModel != null && mModel.isPlaying()) {
mSeekBar.post(mSeekBarRunnable);
}
}
private void updateMetadata() {
if(mUpdatesPaused) {
mNeedsMetadataUpdate = true;
return;
}
mNeedsMetadataUpdate = false;
MediaItemMetadata metadata = mModel != null ? mModel.getMetadata() : null;
mTitle.setText(metadata != null ? metadata.getTitle() : null);
mSubtitle.setText(metadata != null ? metadata.getSubtitle() : null);
if (mAlbumArt != null && metadata != null && (metadata.getAlbumArtUri() != null
|| metadata.getAlbumArtBitmap() != null)) {
mAlbumArt.setVisibility(View.VISIBLE);
metadata.getAlbumArt(mAlbumArt.getContext(), mAlbumArtSize, mAlbumArtSize, true)
.thenAccept(mAlbumArt::setImageBitmap);
} else if (mAlbumArt != null) {
mAlbumArt.setVisibility(View.GONE);
}
}
private static final long SEEK_BAR_UPDATE_TIME_INTERVAL_MS = 1000;
private final Runnable mSeekBarRunnable = new Runnable() {
@Override
public void run() {
if (mModel == null || !mModel.isPlaying()) {
return;
}
updateProgress();
mSeekBar.postDelayed(this, SEEK_BAR_UPDATE_TIME_INTERVAL_MS);
}
};
private void updateProgress() {
if (mModel == null) {
mTime.setVisibility(View.INVISIBLE);
mSeekBar.setVisibility(View.INVISIBLE);
return;
}
long maxProgress = mModel.getMaxProgress();
int visibility = maxProgress > 0 ? View.VISIBLE : View.INVISIBLE;
if (mTime != null) {
String time = String.format("%s / %s",
TIME_FORMAT.format(new Date(mModel.getProgress())),
TIME_FORMAT.format(new Date(maxProgress)));
mTime.setVisibility(visibility);
mTime.setText(time);
}
mSeekBar.setVisibility(visibility);
mSeekBar.setMax((int) mModel.getMaxProgress());
mSeekBar.setProgress((int) mModel.getProgress());
}
public void pauseUpdates() {
mUpdatesPaused = true;
}
public void resumeUpdates() {
mUpdatesPaused = false;
if (mNeedsMetadataUpdate) {
updateMetadata();
}
}
}
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