/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.server;
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import android.content.ContentResolver;
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import android.content.Context;
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import android.content.Intent;
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import android.content.pm.PackageManager;
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import android.media.AudioManager;
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import android.media.Ringtone;
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import android.media.RingtoneManager;
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import android.net.Uri;
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import android.os.Binder;
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import android.os.Handler;
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import android.os.Message;
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import android.os.PowerManager;
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import android.os.SystemClock;
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import android.os.UEventObserver;
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import android.os.UserHandle;
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import android.provider.Settings;
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import android.util.Log;
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import android.util.Slog;
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import com.android.internal.util.DumpUtils;
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import java.io.FileDescriptor;
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import java.io.FileNotFoundException;
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import java.io.FileReader;
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import java.io.PrintWriter;
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/**
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* DockObserver monitors for a docking station.
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*/
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final class DockObserver extends SystemService {
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private static final String TAG = "DockObserver";
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private static final String DOCK_UEVENT_MATCH = "DEVPATH=/devices/virtual/switch/dock";
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private static final String DOCK_STATE_PATH = "/sys/class/switch/dock/state";
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private static final int MSG_DOCK_STATE_CHANGED = 0;
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private final PowerManager mPowerManager;
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private final PowerManager.WakeLock mWakeLock;
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private final Object mLock = new Object();
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private boolean mSystemReady;
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private int mActualDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
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private int mReportedDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
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private int mPreviousDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
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private boolean mUpdatesStopped;
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private final boolean mAllowTheaterModeWakeFromDock;
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public DockObserver(Context context) {
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super(context);
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mPowerManager = (PowerManager)context.getSystemService(Context.POWER_SERVICE);
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mWakeLock = mPowerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
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mAllowTheaterModeWakeFromDock = context.getResources().getBoolean(
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com.android.internal.R.bool.config_allowTheaterModeWakeFromDock);
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init(); // set initial status
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mObserver.startObserving(DOCK_UEVENT_MATCH);
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}
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@Override
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public void onStart() {
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publishBinderService(TAG, new BinderService());
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}
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@Override
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public void onBootPhase(int phase) {
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if (phase == PHASE_ACTIVITY_MANAGER_READY) {
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synchronized (mLock) {
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mSystemReady = true;
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// don't bother broadcasting undocked here
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if (mReportedDockState != Intent.EXTRA_DOCK_STATE_UNDOCKED) {
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updateLocked();
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}
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}
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}
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}
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private void init() {
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synchronized (mLock) {
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try {
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char[] buffer = new char[1024];
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FileReader file = new FileReader(DOCK_STATE_PATH);
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try {
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int len = file.read(buffer, 0, 1024);
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setActualDockStateLocked(Integer.parseInt((new String(buffer, 0, len)).trim()));
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mPreviousDockState = mActualDockState;
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} finally {
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file.close();
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}
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} catch (FileNotFoundException e) {
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Slog.w(TAG, "This kernel does not have dock station support");
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} catch (Exception e) {
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Slog.e(TAG, "" , e);
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}
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}
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}
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private void setActualDockStateLocked(int newState) {
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mActualDockState = newState;
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if (!mUpdatesStopped) {
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setDockStateLocked(newState);
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}
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}
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private void setDockStateLocked(int newState) {
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if (newState != mReportedDockState) {
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mReportedDockState = newState;
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if (mSystemReady) {
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// Wake up immediately when docked or undocked except in theater mode.
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if (mAllowTheaterModeWakeFromDock
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|| Settings.Global.getInt(getContext().getContentResolver(),
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Settings.Global.THEATER_MODE_ON, 0) == 0) {
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mPowerManager.wakeUp(SystemClock.uptimeMillis(),
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"android.server:DOCK");
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}
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updateLocked();
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}
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}
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}
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private void updateLocked() {
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mWakeLock.acquire();
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mHandler.sendEmptyMessage(MSG_DOCK_STATE_CHANGED);
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}
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private void handleDockStateChange() {
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synchronized (mLock) {
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Slog.i(TAG, "Dock state changed from " + mPreviousDockState + " to "
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+ mReportedDockState);
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final int previousDockState = mPreviousDockState;
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mPreviousDockState = mReportedDockState;
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// Skip the dock intent if not yet provisioned.
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final ContentResolver cr = getContext().getContentResolver();
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if (Settings.Global.getInt(cr,
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Settings.Global.DEVICE_PROVISIONED, 0) == 0) {
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Slog.i(TAG, "Device not provisioned, skipping dock broadcast");
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return;
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}
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// Pack up the values and broadcast them to everyone
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Intent intent = new Intent(Intent.ACTION_DOCK_EVENT);
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intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
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intent.putExtra(Intent.EXTRA_DOCK_STATE, mReportedDockState);
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boolean dockSoundsEnabled = Settings.Global.getInt(cr,
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Settings.Global.DOCK_SOUNDS_ENABLED, 1) == 1;
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boolean dockSoundsEnabledWhenAccessibility = Settings.Global.getInt(cr,
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Settings.Global.DOCK_SOUNDS_ENABLED_WHEN_ACCESSIBILITY, 1) == 1;
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boolean accessibilityEnabled = Settings.Secure.getInt(cr,
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Settings.Secure.ACCESSIBILITY_ENABLED, 0) == 1;
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// Play a sound to provide feedback to confirm dock connection.
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// Particularly useful for flaky contact pins...
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if ((dockSoundsEnabled) ||
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(accessibilityEnabled && dockSoundsEnabledWhenAccessibility)) {
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String whichSound = null;
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if (mReportedDockState == Intent.EXTRA_DOCK_STATE_UNDOCKED) {
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if ((previousDockState == Intent.EXTRA_DOCK_STATE_DESK) ||
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(previousDockState == Intent.EXTRA_DOCK_STATE_LE_DESK) ||
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(previousDockState == Intent.EXTRA_DOCK_STATE_HE_DESK)) {
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whichSound = Settings.Global.DESK_UNDOCK_SOUND;
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} else if (previousDockState == Intent.EXTRA_DOCK_STATE_CAR) {
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whichSound = Settings.Global.CAR_UNDOCK_SOUND;
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}
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} else {
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if ((mReportedDockState == Intent.EXTRA_DOCK_STATE_DESK) ||
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(mReportedDockState == Intent.EXTRA_DOCK_STATE_LE_DESK) ||
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(mReportedDockState == Intent.EXTRA_DOCK_STATE_HE_DESK)) {
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whichSound = Settings.Global.DESK_DOCK_SOUND;
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} else if (mReportedDockState == Intent.EXTRA_DOCK_STATE_CAR) {
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whichSound = Settings.Global.CAR_DOCK_SOUND;
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}
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}
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if (whichSound != null) {
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final String soundPath = Settings.Global.getString(cr, whichSound);
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if (soundPath != null) {
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final Uri soundUri = Uri.parse("file://" + soundPath);
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if (soundUri != null) {
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final Ringtone sfx = RingtoneManager.getRingtone(
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getContext(), soundUri);
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if (sfx != null) {
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sfx.setStreamType(AudioManager.STREAM_SYSTEM);
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sfx.play();
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}
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}
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}
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}
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}
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// Send the dock event intent.
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// There are many components in the system watching for this so as to
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// adjust audio routing, screen orientation, etc.
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getContext().sendStickyBroadcastAsUser(intent, UserHandle.ALL);
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}
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}
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private final Handler mHandler = new Handler(true /*async*/) {
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@Override
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public void handleMessage(Message msg) {
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switch (msg.what) {
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case MSG_DOCK_STATE_CHANGED:
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handleDockStateChange();
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mWakeLock.release();
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break;
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}
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}
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};
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private final UEventObserver mObserver = new UEventObserver() {
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@Override
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public void onUEvent(UEventObserver.UEvent event) {
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if (Log.isLoggable(TAG, Log.VERBOSE)) {
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Slog.v(TAG, "Dock UEVENT: " + event.toString());
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}
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try {
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synchronized (mLock) {
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setActualDockStateLocked(Integer.parseInt(event.get("SWITCH_STATE")));
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}
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} catch (NumberFormatException e) {
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Slog.e(TAG, "Could not parse switch state from event " + event);
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}
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}
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};
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private final class BinderService extends Binder {
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@Override
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protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
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if (!DumpUtils.checkDumpPermission(getContext(), TAG, pw)) return;
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final long ident = Binder.clearCallingIdentity();
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try {
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synchronized (mLock) {
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if (args == null || args.length == 0 || "-a".equals(args[0])) {
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pw.println("Current Dock Observer Service state:");
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if (mUpdatesStopped) {
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pw.println(" (UPDATES STOPPED -- use 'reset' to restart)");
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}
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pw.println(" reported state: " + mReportedDockState);
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pw.println(" previous state: " + mPreviousDockState);
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pw.println(" actual state: " + mActualDockState);
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} else if (args.length == 3 && "set".equals(args[0])) {
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String key = args[1];
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String value = args[2];
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try {
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if ("state".equals(key)) {
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mUpdatesStopped = true;
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setDockStateLocked(Integer.parseInt(value));
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} else {
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pw.println("Unknown set option: " + key);
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}
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} catch (NumberFormatException ex) {
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pw.println("Bad value: " + value);
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}
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} else if (args.length == 1 && "reset".equals(args[0])) {
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mUpdatesStopped = false;
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setDockStateLocked(mActualDockState);
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} else {
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pw.println("Dump current dock state, or:");
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pw.println(" set state <value>");
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pw.println(" reset");
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}
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}
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} finally {
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Binder.restoreCallingIdentity(ident);
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}
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}
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}
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}
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