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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.server;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.media.AudioManager;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Handler;
import android.os.Message;
import android.os.PowerManager;
import android.os.SystemClock;
import android.os.UEventObserver;
import android.os.UserHandle;
import android.provider.Settings;
import android.util.Log;
import android.util.Slog;
import java.io.FileNotFoundException;
import java.io.FileReader;
/**
* <p>DockObserver monitors for a docking station.
*/
final class DockObserver extends UEventObserver {
private static final String TAG = DockObserver.class.getSimpleName();
private static final String DOCK_UEVENT_MATCH = "DEVPATH=/devices/virtual/switch/dock";
private static final String DOCK_STATE_PATH = "/sys/class/switch/dock/state";
private static final int MSG_DOCK_STATE_CHANGED = 0;
private final Object mLock = new Object();
private int mDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
private int mPreviousDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
private boolean mSystemReady;
private final Context mContext;
private final PowerManager mPowerManager;
private final PowerManager.WakeLock mWakeLock;
public DockObserver(Context context) {
mContext = context;
mPowerManager = (PowerManager)mContext.getSystemService(Context.POWER_SERVICE);
mWakeLock = mPowerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
init(); // set initial status
startObserving(DOCK_UEVENT_MATCH);
}
@Override
public void onUEvent(UEventObserver.UEvent event) {
if (Log.isLoggable(TAG, Log.VERBOSE)) {
Slog.v(TAG, "Dock UEVENT: " + event.toString());
}
synchronized (mLock) {
try {
int newState = Integer.parseInt(event.get("SWITCH_STATE"));
if (newState != mDockState) {
mPreviousDockState = mDockState;
mDockState = newState;
if (mSystemReady) {
// Wake up immediately when docked or undocked.
mPowerManager.wakeUp(SystemClock.uptimeMillis());
updateLocked();
}
}
} catch (NumberFormatException e) {
Slog.e(TAG, "Could not parse switch state from event " + event);
}
}
}
private void init() {
synchronized (mLock) {
try {
char[] buffer = new char[1024];
FileReader file = new FileReader(DOCK_STATE_PATH);
try {
int len = file.read(buffer, 0, 1024);
mDockState = Integer.valueOf((new String(buffer, 0, len)).trim());
mPreviousDockState = mDockState;
} finally {
file.close();
}
} catch (FileNotFoundException e) {
Slog.w(TAG, "This kernel does not have dock station support");
} catch (Exception e) {
Slog.e(TAG, "" , e);
}
}
}
void systemReady() {
synchronized (mLock) {
// don't bother broadcasting undocked here
if (mDockState != Intent.EXTRA_DOCK_STATE_UNDOCKED) {
updateLocked();
}
mSystemReady = true;
}
}
private void updateLocked() {
mWakeLock.acquire();
mHandler.sendEmptyMessage(MSG_DOCK_STATE_CHANGED);
}
private void handleDockStateChange() {
synchronized (mLock) {
Slog.i(TAG, "Dock state changed: " + mDockState);
// Skip the dock intent if not yet provisioned.
final ContentResolver cr = mContext.getContentResolver();
if (Settings.Global.getInt(cr,
Settings.Global.DEVICE_PROVISIONED, 0) == 0) {
Slog.i(TAG, "Device not provisioned, skipping dock broadcast");
return;
}
// Pack up the values and broadcast them to everyone
Intent intent = new Intent(Intent.ACTION_DOCK_EVENT);
intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
intent.putExtra(Intent.EXTRA_DOCK_STATE, mDockState);
// Play a sound to provide feedback to confirm dock connection.
// Particularly useful for flaky contact pins...
if (Settings.Global.getInt(cr,
Settings.Global.DOCK_SOUNDS_ENABLED, 1) == 1) {
String whichSound = null;
if (mDockState == Intent.EXTRA_DOCK_STATE_UNDOCKED) {
if ((mPreviousDockState == Intent.EXTRA_DOCK_STATE_DESK) ||
(mPreviousDockState == Intent.EXTRA_DOCK_STATE_LE_DESK) ||
(mPreviousDockState == Intent.EXTRA_DOCK_STATE_HE_DESK)) {
whichSound = Settings.Global.DESK_UNDOCK_SOUND;
} else if (mPreviousDockState == Intent.EXTRA_DOCK_STATE_CAR) {
whichSound = Settings.Global.CAR_UNDOCK_SOUND;
}
} else {
if ((mDockState == Intent.EXTRA_DOCK_STATE_DESK) ||
(mDockState == Intent.EXTRA_DOCK_STATE_LE_DESK) ||
(mDockState == Intent.EXTRA_DOCK_STATE_HE_DESK)) {
whichSound = Settings.Global.DESK_DOCK_SOUND;
} else if (mDockState == Intent.EXTRA_DOCK_STATE_CAR) {
whichSound = Settings.Global.CAR_DOCK_SOUND;
}
}
if (whichSound != null) {
final String soundPath = Settings.Global.getString(cr, whichSound);
if (soundPath != null) {
final Uri soundUri = Uri.parse("file://" + soundPath);
if (soundUri != null) {
final Ringtone sfx = RingtoneManager.getRingtone(mContext, soundUri);
if (sfx != null) {
sfx.setStreamType(AudioManager.STREAM_SYSTEM);
sfx.play();
}
}
}
}
}
// Send the dock event intent.
// There are many components in the system watching for this so as to
// adjust audio routing, screen orientation, etc.
mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL);
// Release the wake lock that was acquired when the message was posted.
mWakeLock.release();
}
}
private final Handler mHandler = new Handler(true /*async*/) {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_DOCK_STATE_CHANGED:
handleDockStateChange();
break;
}
}
};
}
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