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                                mDockState != Intent.EXTRA_DOCK_STATE_UNDOCKED) {
87                            mPowerManager.userActivityWithForce(SystemClock.uptimeMillis(),
88                                    false, true);
89                        }
90                        update();
91                    }
92                }
93            } catch (NumberFormatException e) {
94                Slog.e(TAG, "Could not parse switch state from event " + event);
95            }
96        }
97    }
98
99    private final void init() {
100        char[] buffer = new char[1024];
101
102        try {
103            FileReader file = new FileReader(DOCK_STATE_PATH);
104            int len = file.read(buffer, 0, 1024);
105            mPreviousDockState = mDockState = Integer.valueOf((new String(buffer, 0, len)).trim());
106
107        } catch (FileNotFoundException e) {
108            Slog.w(TAG, "This kernel does not have dock station support");
109        } catch (Exception e) {
110            Slog.e(TAG, "" , e);
111        }
112    }
113
114    void systemReady() {
115        synchronized (this) {
116            // don't bother broadcasting undocked here
117            if (mDockState != Intent.EXTRA_DOCK_STATE_UNDOCKED) {
118                update();
119            }
120            mSystemReady = true;
121        }
122    }
123
124    private final void update() {
125        mHandler.sendEmptyMessage(MSG_DOCK_STATE);
126    }
127
128    private final Handler mHandler = new Handler() {
129        @Override
130        public void handleMessage(Message msg) {
131            switch (msg.what) {
132                case MSG_DOCK_STATE:
133                    synchronized (this) {
134                        Slog.i(TAG, "Dock state changed: " + mDockState);
135
136                        final ContentResolver cr = mContext.getContentResolver();
137
138                        if (Settings.Secure.getInt(cr,
139                                Settings.Secure.DEVICE_PROVISIONED, 0) == 0) {
140                            Slog.i(TAG, "Device not provisioned, skipping dock broadcast");
141                            return;
142                        }
143                        // Pack up the values and broadcast them to everyone
144                        Intent intent = new Intent(Intent.ACTION_DOCK_EVENT);
145                        intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
146                        intent.putExtra(Intent.EXTRA_DOCK_STATE, mDockState);
147
148                        // Check if this is Bluetooth Dock
149                        String address = BluetoothService.readDockBluetoothAddress();
150                        if (address != null)
151                            intent.putExtra(BluetoothDevice.EXTRA_DEVICE,
152                                    BluetoothAdapter.getDefaultAdapter().getRemoteDevice(address));
153
154                        // User feedback to confirm dock connection. Particularly
155                        // useful for flaky contact pins...
156                        if (Settings.System.getInt(cr,
157                                Settings.System.DOCK_SOUNDS_ENABLED, 1) == 1)
158                        {
159                            String whichSound = null;
160                            if (mDockState == Intent.EXTRA_DOCK_STATE_UNDOCKED) {
161                                if (mPreviousDockState == Intent.EXTRA_DOCK_STATE_DESK) {
162                                    whichSound = Settings.System.DESK_UNDOCK_SOUND;
163                                } else if (mPreviousDockState == Intent.EXTRA_DOCK_STATE_CAR) {
164                                    whichSound = Settings.System.CAR_UNDOCK_SOUND;
165                                }
166                            } else {
167                                if (mDockState == Intent.EXTRA_DOCK_STATE_DESK) {
168                                    whichSound = Settings.System.DESK_DOCK_SOUND;
169                                } else if (mDockState == Intent.EXTRA_DOCK_STATE_CAR) {
170                                    whichSound = Settings.System.CAR_DOCK_SOUND;
171                                }
172                            }
173
174                            if (whichSound != null) {
175                                final String soundPath = Settings.System.getString(cr, whichSound);
176                                if (soundPath != null) {
177                                    final Uri soundUri = Uri.parse("file://" + soundPath);
178                                    if (soundUri != null) {
179                                        final Ringtone sfx = RingtoneManager.getRingtone(mContext, soundUri);
180                                        if (sfx != null) {
181                                            sfx.setStreamType(AudioManager.STREAM_SYSTEM);
182                                            sfx.play();
183                                        }
184                                    }
185                                }
186                            }
187                        }
188
189                        mContext.sendStickyBroadcast(intent);
190                    }
191                    break;
192            }
193        }
194    };
195}
196