1/*
2 * Copyright (C) 2015 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 */
16package com.android.messaging.ui;
17
18import android.animation.ObjectAnimator;
19import android.animation.TimeAnimator;
20import android.animation.TimeAnimator.TimeListener;
21import android.content.Context;
22import android.graphics.drawable.ClipDrawable;
23import android.graphics.drawable.Drawable;
24import android.os.SystemClock;
25import android.util.AttributeSet;
26import android.view.Gravity;
27import android.widget.ProgressBar;
28
29/**
30 * Shows a styled progress bar that is synchronized with the playback state of an audio attachment.
31 */
32public class AudioPlaybackProgressBar extends ProgressBar implements PlaybackStateView {
33    private long mDurationInMillis;
34    private final TimeAnimator mUpdateAnimator;
35    private long mCumulativeTime = 0;
36    private long mCurrentPlayStartTime = 0;
37    private boolean mIncoming = false;
38
39    public AudioPlaybackProgressBar(final Context context, final AttributeSet attrs) {
40        super(context, attrs);
41
42        mUpdateAnimator = new TimeAnimator();
43        mUpdateAnimator.setRepeatCount(ObjectAnimator.INFINITE);
44        mUpdateAnimator.setTimeListener(new TimeListener() {
45            @Override
46            public void onTimeUpdate(final TimeAnimator animation, final long totalTime,
47                    final long deltaTime) {
48                int progress = 0;
49                if (mDurationInMillis > 0) {
50                    progress = (int) (((mCumulativeTime + SystemClock.elapsedRealtime() -
51                            mCurrentPlayStartTime) * 1.0f / mDurationInMillis) * 100);
52                    progress = Math.max(Math.min(progress, 100), 0);
53                }
54                setProgress(progress);
55            }
56        });
57        updateAppearance();
58    }
59
60    /**
61     * Sets the duration of the audio that's being played, in milliseconds.
62     */
63    public void setDuration(final long durationInMillis) {
64        mDurationInMillis = durationInMillis;
65    }
66
67    @Override
68    public void restart() {
69        reset();
70        resume();
71    }
72
73    @Override
74    public void reset() {
75        stopUpdateTicks();
76        setProgress(0);
77        mCumulativeTime = 0;
78        mCurrentPlayStartTime = 0;
79    }
80
81    @Override
82    public void resume() {
83        mCurrentPlayStartTime = SystemClock.elapsedRealtime();
84        startUpdateTicks();
85    }
86
87    @Override
88    public void pause() {
89        mCumulativeTime += SystemClock.elapsedRealtime() - mCurrentPlayStartTime;
90        stopUpdateTicks();
91    }
92
93    private void startUpdateTicks() {
94        if (!mUpdateAnimator.isStarted()) {
95            mUpdateAnimator.start();
96        }
97    }
98
99    private void stopUpdateTicks() {
100        if (mUpdateAnimator.isStarted()) {
101            mUpdateAnimator.end();
102        }
103    }
104
105    private void updateAppearance() {
106        final Drawable drawable =
107                ConversationDrawables.get().getAudioProgressDrawable(mIncoming);
108        final ClipDrawable clipDrawable = new ClipDrawable(drawable, Gravity.START,
109                ClipDrawable.HORIZONTAL);
110        setProgressDrawable(clipDrawable);
111        setBackground(ConversationDrawables.get()
112                .getAudioProgressBackgroundDrawable(mIncoming));
113    }
114
115    public void setVisualStyle(final boolean incoming) {
116        if (mIncoming != incoming) {
117            mIncoming = incoming;
118            updateAppearance();
119        }
120    }
121}
122