1/*
2 * Copyright (C) 2014 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.statusbar;
18
19import com.android.internal.app.IBatteryStats;
20import com.android.keyguard.KeyguardUpdateMonitor;
21import com.android.keyguard.KeyguardUpdateMonitorCallback;
22import com.android.systemui.R;
23import com.android.systemui.statusbar.phone.KeyguardIndicationTextView;
24
25import android.content.BroadcastReceiver;
26import android.content.Context;
27import android.content.Intent;
28import android.content.IntentFilter;
29import android.os.BatteryManager;
30import android.os.BatteryStats;
31import android.os.Handler;
32import android.os.Message;
33import android.os.RemoteException;
34import android.os.ServiceManager;
35import android.os.UserHandle;
36import android.text.TextUtils;
37import android.text.format.Formatter;
38import android.util.Log;
39import android.view.View;
40
41/**
42 * Controls the little text indicator on the keyguard.
43 */
44public class KeyguardIndicationController {
45
46    private static final String TAG = "KeyguardIndicationController";
47
48    private static final int MSG_HIDE_TRANSIENT = 1;
49
50    private final Context mContext;
51    private final KeyguardIndicationTextView mTextView;
52    private final IBatteryStats mBatteryInfo;
53
54    private String mRestingIndication;
55    private String mTransientIndication;
56    private boolean mVisible;
57
58    private boolean mPowerPluggedIn;
59    private boolean mPowerCharged;
60
61    public KeyguardIndicationController(Context context, KeyguardIndicationTextView textView) {
62        mContext = context;
63        mTextView = textView;
64
65        mBatteryInfo = IBatteryStats.Stub.asInterface(
66                ServiceManager.getService(BatteryStats.SERVICE_NAME));
67        KeyguardUpdateMonitor.getInstance(context).registerCallback(mUpdateMonitor);
68        context.registerReceiverAsUser(
69                mReceiver, UserHandle.OWNER, new IntentFilter(Intent.ACTION_TIME_TICK), null, null);
70    }
71
72    public void setVisible(boolean visible) {
73        mVisible = visible;
74        mTextView.setVisibility(visible ? View.VISIBLE : View.GONE);
75        if (visible) {
76            hideTransientIndication();
77            updateIndication();
78        }
79    }
80
81    /**
82     * Sets the indication that is shown if nothing else is showing.
83     */
84    public void setRestingIndication(String restingIndication) {
85        mRestingIndication = restingIndication;
86        updateIndication();
87    }
88
89    /**
90     * Hides transient indication in {@param delayMs}.
91     */
92    public void hideTransientIndicationDelayed(long delayMs) {
93        mHandler.sendMessageDelayed(
94                mHandler.obtainMessage(MSG_HIDE_TRANSIENT), delayMs);
95    }
96
97    /**
98     * Shows {@param transientIndication} until it is hidden by {@link #hideTransientIndication}.
99     */
100    public void showTransientIndication(int transientIndication) {
101        showTransientIndication(mContext.getResources().getString(transientIndication));
102    }
103
104    /**
105     * Shows {@param transientIndication} until it is hidden by {@link #hideTransientIndication}.
106     */
107    public void showTransientIndication(String transientIndication) {
108        mTransientIndication = transientIndication;
109        mHandler.removeMessages(MSG_HIDE_TRANSIENT);
110        updateIndication();
111    }
112
113    /**
114     * Hides transient indication.
115     */
116    public void hideTransientIndication() {
117        if (mTransientIndication != null) {
118            mTransientIndication = null;
119            mHandler.removeMessages(MSG_HIDE_TRANSIENT);
120            updateIndication();
121        }
122    }
123
124    private void updateIndication() {
125        if (mVisible) {
126            mTextView.switchIndication(computeIndication());
127        }
128    }
129
130    private String computeIndication() {
131        if (!TextUtils.isEmpty(mTransientIndication)) {
132            return mTransientIndication;
133        }
134        if (mPowerPluggedIn) {
135            return computePowerIndication();
136        }
137        return mRestingIndication;
138    }
139
140    private String computePowerIndication() {
141        if (mPowerCharged) {
142            return mContext.getResources().getString(R.string.keyguard_charged);
143        }
144
145        // Try fetching charging time from battery stats.
146        try {
147            long chargingTimeRemaining = mBatteryInfo.computeChargeTimeRemaining();
148            if (chargingTimeRemaining > 0) {
149                String chargingTimeFormatted = Formatter.formatShortElapsedTimeRoundingUpToMinutes(
150                        mContext, chargingTimeRemaining);
151                return mContext.getResources().getString(
152                        R.string.keyguard_indication_charging_time, chargingTimeFormatted);
153            }
154        } catch (RemoteException e) {
155            Log.e(TAG, "Error calling IBatteryStats: ", e);
156        }
157
158        // Fall back to simple charging label.
159        return mContext.getResources().getString(R.string.keyguard_plugged_in);
160    }
161
162    KeyguardUpdateMonitorCallback mUpdateMonitor = new KeyguardUpdateMonitorCallback() {
163        @Override
164        public void onRefreshBatteryInfo(KeyguardUpdateMonitor.BatteryStatus status) {
165            boolean isChargingOrFull = status.status == BatteryManager.BATTERY_STATUS_CHARGING
166                    || status.status == BatteryManager.BATTERY_STATUS_FULL;
167            mPowerPluggedIn = status.isPluggedIn() && isChargingOrFull;
168            mPowerCharged = status.isCharged();
169            updateIndication();
170        }
171    };
172
173    BroadcastReceiver mReceiver = new BroadcastReceiver() {
174        @Override
175        public void onReceive(Context context, Intent intent) {
176            if (mVisible) {
177                updateIndication();
178            }
179        }
180    };
181
182    private final Handler mHandler = new Handler() {
183        @Override
184        public void handleMessage(Message msg) {
185            if (msg.what == MSG_HIDE_TRANSIENT && mTransientIndication != null) {
186                mTransientIndication = null;
187                updateIndication();
188            }
189        }
190    };
191}
192