DockObserver.java revision 9773ebb7783ecd29957b43acbe5b26ba459a7458 
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 com.android.server.power.PowerManagerService;
20
21import android.bluetooth.BluetoothAdapter;
22import android.bluetooth.BluetoothDevice;
23import android.content.ContentResolver;
24import android.content.Context;
25import android.content.Intent;
26import android.media.AudioManager;
27import android.media.Ringtone;
28import android.media.RingtoneManager;
29import android.net.Uri;
30import android.os.Handler;
31import android.os.Message;
32import android.os.SystemClock;
33import android.os.UEventObserver;
34import android.provider.Settings;
35import android.util.Log;
36import android.util.Slog;
37
38import java.io.FileNotFoundException;
39import java.io.FileReader;
40
41/**
42 * <p>DockObserver monitors for a docking station.
43 */
44class DockObserver extends UEventObserver {
45    private static final String TAG = DockObserver.class.getSimpleName();
46    private static final boolean LOG = false;
47
48    private static final String DOCK_UEVENT_MATCH = "DEVPATH=/devices/virtual/switch/dock";
49    private static final String DOCK_STATE_PATH = "/sys/class/switch/dock/state";
50
51    private static final int MSG_DOCK_STATE = 0;
52
53    private int mDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
54    private int mPreviousDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
55
56    private boolean mSystemReady;
57
58    private final Context mContext;
59
60    private PowerManagerService mPowerManager;
61
62    public DockObserver(Context context, PowerManagerService pm) {
63        mContext = context;
64        mPowerManager = pm;
65        init();  // set initial status
66
67        startObserving(DOCK_UEVENT_MATCH);
68    }
69
70    @Override
71    public void onUEvent(UEventObserver.UEvent event) {
72        if (Log.isLoggable(TAG, Log.VERBOSE)) {
73            Slog.v(TAG, "Dock UEVENT: " + event.toString());
74        }
75
76        synchronized (this) {
77            try {
78                int newState = Integer.parseInt(event.get("SWITCH_STATE"));
79                if (newState != mDockState) {
80                    mPreviousDockState = mDockState;
81                    mDockState = newState;
82                    if (mSystemReady) {
83                        // Don't force screen on when undocking from the desk dock.
84                        // The change in power state will do this anyway.
85                        // FIXME - we should be configurable.
86                        if ((mPreviousDockState != Intent.EXTRA_DOCK_STATE_DESK
87                                && mPreviousDockState != Intent.EXTRA_DOCK_STATE_LE_DESK
88                                && mPreviousDockState != Intent.EXTRA_DOCK_STATE_HE_DESK) ||
89                                mDockState != Intent.EXTRA_DOCK_STATE_UNDOCKED) {
90                            mPowerManager.userActivityWithForce(SystemClock.uptimeMillis(),
91                                    false, true);
92                        }
93                        update();
94                    }
95                }
96            } catch (NumberFormatException e) {
97                Slog.e(TAG, "Could not parse switch state from event " + event);
98            }
99        }
100    }
101
102    private final void init() {
103        char[] buffer = new char[1024];
104
105        try {
106            FileReader file = new FileReader(DOCK_STATE_PATH);
107            int len = file.read(buffer, 0, 1024);
108            file.close();
109            mPreviousDockState = mDockState = Integer.valueOf((new String(buffer, 0, len)).trim());
110        } catch (FileNotFoundException e) {
111            Slog.w(TAG, "This kernel does not have dock station support");
112        } catch (Exception e) {
113            Slog.e(TAG, "" , e);
114        }
115    }
116
117    void systemReady() {
118        synchronized (this) {
119            // don't bother broadcasting undocked here
120            if (mDockState != Intent.EXTRA_DOCK_STATE_UNDOCKED) {
121                update();
122            }
123            mSystemReady = true;
124        }
125    }
126
127    private final void update() {
128        mHandler.sendEmptyMessage(MSG_DOCK_STATE);
129    }
130
131    private final Handler mHandler = new Handler() {
132        @Override
133        public void handleMessage(Message msg) {
134            switch (msg.what) {
135                case MSG_DOCK_STATE:
136                    synchronized (this) {
137                        Slog.i(TAG, "Dock state changed: " + mDockState);
138
139                        final ContentResolver cr = mContext.getContentResolver();
140
141                        if (Settings.Secure.getInt(cr,
142                                Settings.Secure.DEVICE_PROVISIONED, 0) == 0) {
143                            Slog.i(TAG, "Device not provisioned, skipping dock broadcast");
144                            return;
145                        }
146                        // Pack up the values and broadcast them to everyone
147                        Intent intent = new Intent(Intent.ACTION_DOCK_EVENT);
148                        intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
149                        intent.putExtra(Intent.EXTRA_DOCK_STATE, mDockState);
150
151                        // Check if this is Bluetooth Dock
152                        // TODO(BT): Get Dock address.
153                        String address = null;
154                        if (address != null)
155                            intent.putExtra(BluetoothDevice.EXTRA_DEVICE,
156                                    BluetoothAdapter.getDefaultAdapter().getRemoteDevice(address));
157
158                        // User feedback to confirm dock connection. Particularly
159                        // useful for flaky contact pins...
160                        if (Settings.System.getInt(cr,
161                                Settings.System.DOCK_SOUNDS_ENABLED, 1) == 1)
162                        {
163                            String whichSound = null;
164                            if (mDockState == Intent.EXTRA_DOCK_STATE_UNDOCKED) {
165                                if ((mPreviousDockState == Intent.EXTRA_DOCK_STATE_DESK) ||
166                                    (mPreviousDockState == Intent.EXTRA_DOCK_STATE_LE_DESK) ||
167                                    (mPreviousDockState == Intent.EXTRA_DOCK_STATE_HE_DESK)) {
168                                    whichSound = Settings.System.DESK_UNDOCK_SOUND;
169                                } else if (mPreviousDockState == Intent.EXTRA_DOCK_STATE_CAR) {
170                                    whichSound = Settings.System.CAR_UNDOCK_SOUND;
171                                }
172                            } else {
173                                if ((mDockState == Intent.EXTRA_DOCK_STATE_DESK) ||
174                                    (mDockState == Intent.EXTRA_DOCK_STATE_LE_DESK) ||
175                                    (mDockState == Intent.EXTRA_DOCK_STATE_HE_DESK)) {
176                                    whichSound = Settings.System.DESK_DOCK_SOUND;
177                                } else if (mDockState == Intent.EXTRA_DOCK_STATE_CAR) {
178                                    whichSound = Settings.System.CAR_DOCK_SOUND;
179                                }
180                            }
181
182                            if (whichSound != null) {
183                                final String soundPath = Settings.System.getString(cr, whichSound);
184                                if (soundPath != null) {
185                                    final Uri soundUri = Uri.parse("file://" + soundPath);
186                                    if (soundUri != null) {
187                                        final Ringtone sfx = RingtoneManager.getRingtone(mContext, soundUri);
188                                        if (sfx != null) {
189                                            sfx.setStreamType(AudioManager.STREAM_SYSTEM);
190                                            sfx.play();
191                                        }
192                                    }
193                                }
194                            }
195                        }
196
197                        mContext.sendStickyBroadcast(intent);
198                    }
199                    break;
200            }
201        }
202    };
203}
204