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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.app.Activity;
import android.app.KeyguardManager;
import android.content.ActivityNotFoundException;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Handler;
import android.os.Message;
import android.os.SystemClock;
import android.os.UEventObserver;
import android.provider.Settings;
import android.util.Log;
import com.android.internal.widget.LockPatternUtils;
import java.io.FileReader;
import java.io.FileNotFoundException;
/**
* <p>DockObserver monitors for a docking station.
*/
class DockObserver extends UEventObserver {
private static final String TAG = DockObserver.class.getSimpleName();
private static final boolean LOG = false;
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 int mDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
private boolean mSystemReady;
private final Context mContext;
private PowerManagerService mPowerManager;
private KeyguardManager.KeyguardLock mKeyguardLock;
private boolean mKeyguardDisabled;
private LockPatternUtils mLockPatternUtils;
// The broadcast receiver which receives the result of the ordered broadcast sent when
// the dock state changes. The original ordered broadcast is sent with an initial result
// code of RESULT_OK. If any of the registered broadcast receivers changes this value, e.g.,
// to RESULT_CANCELED, then the intent to start a dock app will not be sent.
private final BroadcastReceiver mResultReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if (getResultCode() != Activity.RESULT_OK) {
return;
}
// Launch a dock activity
String category;
switch (mDockState) {
case Intent.EXTRA_DOCK_STATE_CAR:
category = Intent.CATEGORY_CAR_DOCK;
break;
case Intent.EXTRA_DOCK_STATE_DESK:
category = Intent.CATEGORY_DESK_DOCK;
break;
default:
category = null;
break;
}
if (category != null) {
intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(category);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
try {
mContext.startActivity(intent);
} catch (ActivityNotFoundException e) {
Log.w(TAG, e.getCause());
}
}
}
};
public DockObserver(Context context, PowerManagerService pm) {
mContext = context;
mPowerManager = pm;
mLockPatternUtils = new LockPatternUtils(context.getContentResolver());
init(); // set initial status
startObserving(DOCK_UEVENT_MATCH);
}
@Override
public void onUEvent(UEventObserver.UEvent event) {
if (Log.isLoggable(TAG, Log.VERBOSE)) {
Log.v(TAG, "Dock UEVENT: " + event.toString());
}
synchronized (this) {
try {
int newState = Integer.parseInt(event.get("SWITCH_STATE"));
if (newState != mDockState) {
mDockState = newState;
if (mSystemReady) {
update();
}
}
} catch (NumberFormatException e) {
Log.e(TAG, "Could not parse switch state from event " + event);
}
}
}
private final void init() {
char[] buffer = new char[1024];
try {
FileReader file = new FileReader(DOCK_STATE_PATH);
int len = file.read(buffer, 0, 1024);
mDockState = Integer.valueOf((new String(buffer, 0, len)).trim());
} catch (FileNotFoundException e) {
Log.w(TAG, "This kernel does not have dock station support");
} catch (Exception e) {
Log.e(TAG, "" , e);
}
}
void systemReady() {
synchronized (this) {
KeyguardManager keyguardManager =
(KeyguardManager)mContext.getSystemService(Context.KEYGUARD_SERVICE);
mKeyguardLock = keyguardManager.newKeyguardLock(TAG);
// don't bother broadcasting undocked here
if (mDockState != Intent.EXTRA_DOCK_STATE_UNDOCKED) {
update();
}
mSystemReady = true;
}
}
private final void update() {
mHandler.sendEmptyMessage(0);
}
private final Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
synchronized (this) {
Log.i(TAG, "Dock state changed: " + mDockState);
if (Settings.Secure.getInt(mContext.getContentResolver(),
Settings.Secure.DEVICE_PROVISIONED, 0) == 0) {
Log.i(TAG, "Device not provisioned, skipping dock broadcast");
return;
}
// Pack up the values and broadcast them to everyone
mPowerManager.userActivityWithForce(SystemClock.uptimeMillis(), false, true);
Intent intent = new Intent(Intent.ACTION_DOCK_EVENT);
intent.putExtra(Intent.EXTRA_DOCK_STATE, mDockState);
// Send the ordered broadcast; the result receiver will receive after all
// broadcasts have been sent. If any broadcast receiver changes the result
// code from the initial value of RESULT_OK, then the result receiver will
// not launch the corresponding dock application. This gives apps a chance
// to override the behavior and stay in their app even when the device is
// placed into a dock.
mContext.sendStickyOrderedBroadcast(
intent, mResultReceiver, null, Activity.RESULT_OK, null, null);
}
}
};
}
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