1/*
2 * Copyright (C) 2008 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.server;
18
19import android.bluetooth.BluetoothAdapter;
20import android.bluetooth.BluetoothDevice;
21import android.content.ContentResolver;
22import android.content.Context;
23import android.content.Intent;
24import android.media.AudioManager;
25import android.media.Ringtone;
26import android.media.RingtoneManager;
27import android.net.Uri;
28import android.os.Handler;
29import android.os.Message;
30import android.os.SystemClock;
31import android.os.UEventObserver;
32import android.provider.Settings;
33import android.server.BluetoothService;
34import android.util.Log;
35import android.util.Slog;
36
37import java.io.FileNotFoundException;
38import java.io.FileReader;
39
40/**
41 * <p>DockObserver monitors for a docking station.
42 */
43class DockObserver extends UEventObserver {
44    private static final String TAG = DockObserver.class.getSimpleName();
45    private static final boolean LOG = false;
46
47    private static final String DOCK_UEVENT_MATCH = "DEVPATH=/devices/virtual/switch/dock";
48    private static final String DOCK_STATE_PATH = "/sys/class/switch/dock/state";
49
50    private static final int MSG_DOCK_STATE = 0;
51
52    private int mDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
53    private int mPreviousDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
54
55    private boolean mSystemReady;
56
57    private final Context mContext;
58
59    private PowerManagerService mPowerManager;
60
61    public DockObserver(Context context, PowerManagerService pm) {
62        mContext = context;
63        mPowerManager = pm;
64        init();  // set initial status
65
66        startObserving(DOCK_UEVENT_MATCH);
67    }
68
69    @Override
70    public void onUEvent(UEventObserver.UEvent event) {
71        if (Log.isLoggable(TAG, Log.VERBOSE)) {
72            Slog.v(TAG, "Dock UEVENT: " + event.toString());
73        }
74
75        synchronized (this) {
76            try {
77                int newState = Integer.parseInt(event.get("SWITCH_STATE"));
78                if (newState != mDockState) {
79                    mPreviousDockState = mDockState;
80                    mDockState = newState;
81                    if (mSystemReady) {
82                        // Don't force screen on when undocking from the desk dock.
83                        // The change in power state will do this anyway.
84                        // FIXME - we should be configurable.
85                        if ((mPreviousDockState != Intent.EXTRA_DOCK_STATE_DESK
86                                && mPreviousDockState != Intent.EXTRA_DOCK_STATE_LE_DESK
87                                && mPreviousDockState != Intent.EXTRA_DOCK_STATE_HE_DESK) ||
88                                mDockState != Intent.EXTRA_DOCK_STATE_UNDOCKED) {
89                            mPowerManager.userActivityWithForce(SystemClock.uptimeMillis(),
90                                    false, true);
91                        }
92                        update();
93                    }
94                }
95            } catch (NumberFormatException e) {
96                Slog.e(TAG, "Could not parse switch state from event " + event);
97            }
98        }
99    }
100
101    private final void init() {
102        char[] buffer = new char[1024];
103
104        try {
105            FileReader file = new FileReader(DOCK_STATE_PATH);
106            int len = file.read(buffer, 0, 1024);
107            file.close();
108            mPreviousDockState = mDockState = Integer.valueOf((new String(buffer, 0, len)).trim());
109        } catch (FileNotFoundException e) {
110            Slog.w(TAG, "This kernel does not have dock station support");
111        } catch (Exception e) {
112            Slog.e(TAG, "" , e);
113        }
114    }
115
116    void systemReady() {
117        synchronized (this) {
118            // don't bother broadcasting undocked here
119            if (mDockState != Intent.EXTRA_DOCK_STATE_UNDOCKED) {
120                update();
121            }
122            mSystemReady = true;
123        }
124    }
125
126    private final void update() {
127        mHandler.sendEmptyMessage(MSG_DOCK_STATE);
128    }
129
130    private final Handler mHandler = new Handler() {
131        @Override
132        public void handleMessage(Message msg) {
133            switch (msg.what) {
134                case MSG_DOCK_STATE:
135                    synchronized (this) {
136                        Slog.i(TAG, "Dock state changed: " + mDockState);
137
138                        final ContentResolver cr = mContext.getContentResolver();
139
140                        if (Settings.Secure.getInt(cr,
141                                Settings.Secure.DEVICE_PROVISIONED, 0) == 0) {
142                            Slog.i(TAG, "Device not provisioned, skipping dock broadcast");
143                            return;
144                        }
145                        // Pack up the values and broadcast them to everyone
146                        Intent intent = new Intent(Intent.ACTION_DOCK_EVENT);
147                        intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
148                        intent.putExtra(Intent.EXTRA_DOCK_STATE, mDockState);
149
150                        // Check if this is Bluetooth Dock
151                        String address = BluetoothService.readDockBluetoothAddress();
152                        if (address != null)
153                            intent.putExtra(BluetoothDevice.EXTRA_DEVICE,
154                                    BluetoothAdapter.getDefaultAdapter().getRemoteDevice(address));
155
156                        // User feedback to confirm dock connection. Particularly
157                        // useful for flaky contact pins...
158                        if (Settings.System.getInt(cr,
159                                Settings.System.DOCK_SOUNDS_ENABLED, 1) == 1)
160                        {
161                            String whichSound = null;
162                            if (mDockState == Intent.EXTRA_DOCK_STATE_UNDOCKED) {
163                                if ((mPreviousDockState == Intent.EXTRA_DOCK_STATE_DESK) ||
164                                    (mPreviousDockState == Intent.EXTRA_DOCK_STATE_LE_DESK) ||
165                                    (mPreviousDockState == Intent.EXTRA_DOCK_STATE_HE_DESK)) {
166                                    whichSound = Settings.System.DESK_UNDOCK_SOUND;
167                                } else if (mPreviousDockState == Intent.EXTRA_DOCK_STATE_CAR) {
168                                    whichSound = Settings.System.CAR_UNDOCK_SOUND;
169                                }
170                            } else {
171                                if ((mDockState == Intent.EXTRA_DOCK_STATE_DESK) ||
172                                    (mDockState == Intent.EXTRA_DOCK_STATE_LE_DESK) ||
173                                    (mDockState == Intent.EXTRA_DOCK_STATE_HE_DESK)) {
174                                    whichSound = Settings.System.DESK_DOCK_SOUND;
175                                } else if (mDockState == Intent.EXTRA_DOCK_STATE_CAR) {
176                                    whichSound = Settings.System.CAR_DOCK_SOUND;
177                                }
178                            }
179
180                            if (whichSound != null) {
181                                final String soundPath = Settings.System.getString(cr, whichSound);
182                                if (soundPath != null) {
183                                    final Uri soundUri = Uri.parse("file://" + soundPath);
184                                    if (soundUri != null) {
185                                        final Ringtone sfx = RingtoneManager.getRingtone(mContext, soundUri);
186                                        if (sfx != null) {
187                                            sfx.setStreamType(AudioManager.STREAM_SYSTEM);
188                                            sfx.play();
189                                        }
190                                    }
191                                }
192                            }
193                        }
194
195                        mContext.sendStickyBroadcast(intent);
196                    }
197                    break;
198            }
199        }
200    };
201}
202