1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.systemui.pip.tv;
18
19import android.app.ActivityManager;
20import android.app.PendingIntent.CanceledException;
21import android.app.RemoteAction;
22import android.content.Context;
23import android.graphics.Color;
24import android.media.session.MediaController;
25import android.media.session.PlaybackState;
26import android.os.Handler;
27import android.os.RemoteException;
28import android.util.Log;
29import android.view.View;
30import android.view.Gravity;
31import android.view.LayoutInflater;
32import android.widget.ImageView;
33import android.widget.LinearLayout;
34import android.util.AttributeSet;
35
36import com.android.systemui.R;
37
38import static android.media.session.PlaybackState.ACTION_PAUSE;
39import static android.media.session.PlaybackState.ACTION_PLAY;
40
41import java.util.ArrayList;
42import java.util.List;
43
44
45/**
46 * A view containing PIP controls including fullscreen, close, and media controls.
47 */
48public class PipControlsView extends LinearLayout {
49
50    private static final String TAG = PipControlsView.class.getSimpleName();
51
52    private static final float DISABLED_ACTION_ALPHA = 0.54f;
53
54    /**
55     * An interface to listen user action.
56     */
57    public abstract static interface Listener {
58        /**
59         * Called when an user clicks close PIP button.
60         */
61        public abstract void onClosed();
62    };
63
64    private MediaController mMediaController;
65
66    private final PipManager mPipManager = PipManager.getInstance();
67    private final LayoutInflater mLayoutInflater;
68    private final Handler mHandler;
69    private Listener mListener;
70
71    private PipControlButtonView mFullButtonView;
72    private PipControlButtonView mCloseButtonView;
73    private PipControlButtonView mPlayPauseButtonView;
74    private ArrayList<PipControlButtonView> mCustomButtonViews = new ArrayList<>();
75    private List<RemoteAction> mCustomActions = new ArrayList<>();
76
77    private PipControlButtonView mFocusedChild;
78
79    private MediaController.Callback mMediaControllerCallback = new MediaController.Callback() {
80        @Override
81        public void onPlaybackStateChanged(PlaybackState state) {
82            updateUserActions();
83        }
84    };
85
86    private final PipManager.MediaListener mPipMediaListener = new PipManager.MediaListener() {
87        @Override
88        public void onMediaControllerChanged() {
89            updateMediaController();
90        }
91    };
92
93    private final OnFocusChangeListener mFocusChangeListener = new OnFocusChangeListener() {
94        @Override
95        public void onFocusChange(View view, boolean hasFocus) {
96            if (hasFocus) {
97                mFocusedChild = (PipControlButtonView) view;
98            } else if (mFocusedChild == view) {
99                mFocusedChild = null;
100            }
101        }
102    };
103
104    public PipControlsView(Context context) {
105        this(context, null, 0, 0);
106    }
107
108    public PipControlsView(Context context, AttributeSet attrs) {
109        this(context, attrs, 0, 0);
110    }
111
112    public PipControlsView(Context context, AttributeSet attrs, int defStyleAttr) {
113        this(context, attrs, defStyleAttr, 0);
114    }
115
116    public PipControlsView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
117        super(context, attrs, defStyleAttr, defStyleRes);
118        mLayoutInflater = (LayoutInflater) getContext()
119                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
120        mLayoutInflater.inflate(R.layout.tv_pip_controls, this);
121        mHandler = new Handler();
122
123        setOrientation(LinearLayout.HORIZONTAL);
124        setGravity(Gravity.TOP | Gravity.CENTER_HORIZONTAL);
125    }
126
127    @Override
128    public void onFinishInflate() {
129        super.onFinishInflate();
130
131        mFullButtonView = findViewById(R.id.full_button);
132        mFullButtonView.setOnFocusChangeListener(mFocusChangeListener);
133        mFullButtonView.setOnClickListener(new View.OnClickListener() {
134            @Override
135            public void onClick(View v) {
136                mPipManager.movePipToFullscreen();
137            }
138        });
139
140        mCloseButtonView = findViewById(R.id.close_button);
141        mCloseButtonView.setOnFocusChangeListener(mFocusChangeListener);
142        mCloseButtonView.setOnClickListener(new View.OnClickListener() {
143            @Override
144            public void onClick(View v) {
145                mPipManager.closePip();
146                if (mListener != null) {
147                    mListener.onClosed();
148                }
149            }
150        });
151
152        mPlayPauseButtonView = findViewById(R.id.play_pause_button);
153        mPlayPauseButtonView.setOnFocusChangeListener(mFocusChangeListener);
154        mPlayPauseButtonView.setOnClickListener(new View.OnClickListener() {
155            @Override
156            public void onClick(View v) {
157                if (mMediaController == null || mMediaController.getPlaybackState() == null) {
158                    return;
159                }
160                long actions = mMediaController.getPlaybackState().getActions();
161                int state = mMediaController.getPlaybackState().getState();
162                if (mPipManager.getPlaybackState() == PipManager.PLAYBACK_STATE_PAUSED) {
163                    mMediaController.getTransportControls().play();
164                } else if (mPipManager.getPlaybackState() == PipManager.PLAYBACK_STATE_PLAYING) {
165                    mMediaController.getTransportControls().pause();
166                }
167                // View will be updated later in {@link mMediaControllerCallback}
168            }
169        });
170    }
171
172    @Override
173    public void onAttachedToWindow() {
174        super.onAttachedToWindow();
175        updateMediaController();
176        mPipManager.addMediaListener(mPipMediaListener);
177    }
178
179    @Override
180    public void onDetachedFromWindow() {
181        super.onDetachedFromWindow();
182        mPipManager.removeMediaListener(mPipMediaListener);
183        if (mMediaController != null) {
184            mMediaController.unregisterCallback(mMediaControllerCallback);
185        }
186    }
187
188    private void updateMediaController() {
189        MediaController newController = mPipManager.getMediaController();
190        if (mMediaController == newController) {
191            return;
192        }
193        if (mMediaController != null) {
194            mMediaController.unregisterCallback(mMediaControllerCallback);
195        }
196        mMediaController = newController;
197        if (mMediaController != null) {
198            mMediaController.registerCallback(mMediaControllerCallback);
199        }
200        updateUserActions();
201    }
202
203    /**
204     * Updates the actions for the PIP. If there are no custom actions, then the media session
205     * actions are shown.
206     */
207    private void updateUserActions() {
208        if (!mCustomActions.isEmpty()) {
209            // Ensure we have as many buttons as actions
210            while (mCustomButtonViews.size() < mCustomActions.size()) {
211                PipControlButtonView buttonView = (PipControlButtonView) mLayoutInflater.inflate(
212                        R.layout.tv_pip_custom_control, this, false);
213                addView(buttonView);
214                mCustomButtonViews.add(buttonView);
215            }
216
217            // Update the visibility of all views
218            for (int i = 0; i < mCustomButtonViews.size(); i++) {
219                mCustomButtonViews.get(i).setVisibility(i < mCustomActions.size()
220                        ? View.VISIBLE
221                        : View.GONE);
222            }
223
224            // Update the state and visibility of the action buttons, and hide the rest
225            for (int i = 0; i < mCustomActions.size(); i++) {
226                final RemoteAction action = mCustomActions.get(i);
227                PipControlButtonView actionView = mCustomButtonViews.get(i);
228
229                // TODO: Check if the action drawable has changed before we reload it
230                action.getIcon().loadDrawableAsync(getContext(), d -> {
231                    d.setTint(Color.WHITE);
232                    actionView.setImageDrawable(d);
233                }, mHandler);
234                actionView.setText(action.getContentDescription());
235                if (action.isEnabled()) {
236                    actionView.setOnClickListener(v -> {
237                        try {
238                            action.getActionIntent().send();
239                        } catch (CanceledException e) {
240                            Log.w(TAG, "Failed to send action", e);
241                        }
242                    });
243                }
244                actionView.setEnabled(action.isEnabled());
245                actionView.setAlpha(action.isEnabled() ? 1f : DISABLED_ACTION_ALPHA);
246            }
247
248            // Hide the media session buttons
249            mPlayPauseButtonView.setVisibility(View.GONE);
250        } else {
251            int state = mPipManager.getPlaybackState();
252            if (state == PipManager.PLAYBACK_STATE_UNAVAILABLE) {
253                mPlayPauseButtonView.setVisibility(View.GONE);
254            } else {
255                mPlayPauseButtonView.setVisibility(View.VISIBLE);
256                if (state == PipManager.PLAYBACK_STATE_PLAYING) {
257                    mPlayPauseButtonView.setImageResource(R.drawable.ic_pause_white);
258                    mPlayPauseButtonView.setText(R.string.pip_pause);
259                } else {
260                    mPlayPauseButtonView.setImageResource(R.drawable.ic_play_arrow_white);
261                    mPlayPauseButtonView.setText(R.string.pip_play);
262                }
263            }
264
265            // Hide all the custom action buttons
266            for (int i = 0; i < mCustomButtonViews.size(); i++) {
267                mCustomButtonViews.get(i).setVisibility(View.GONE);
268            }
269        }
270    }
271
272    /**
273     * Resets to initial state.
274     */
275    public void reset() {
276        mFullButtonView.reset();
277        mCloseButtonView.reset();
278        mPlayPauseButtonView.reset();
279        mFullButtonView.requestFocus();
280        for (int i = 0; i < mCustomButtonViews.size(); i++) {
281            mCustomButtonViews.get(i).reset();
282        }
283    }
284
285    /**
286     * Sets the {@link Listener} to listen user actions.
287     */
288    public void setListener(Listener listener) {
289        mListener = listener;
290    }
291
292    /**
293     * Updates the set of activity-defined actions.
294     */
295    public void setActions(List<RemoteAction> actions) {
296        mCustomActions.clear();
297        mCustomActions.addAll(actions);
298        updateUserActions();
299    }
300
301    /**
302     * Returns the focused control button view to animate focused button.
303     */
304    PipControlButtonView getFocusedButton() {
305        return mFocusedChild;
306    }
307}
308