src.com.android.server.DockObserver Maven / Gradle / Ivy
/*
* 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.Binder;
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.Pair;
import android.util.Slog;
import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.util.DumpUtils;
import com.android.server.ExtconUEventObserver.ExtconInfo;
import java.io.FileDescriptor;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* DockObserver monitors for a docking station.
*/
final class DockObserver extends SystemService {
private static final String TAG = "DockObserver";
private static final int MSG_DOCK_STATE_CHANGED = 0;
private final PowerManager mPowerManager;
private final PowerManager.WakeLock mWakeLock;
private final Object mLock = new Object();
private boolean mSystemReady;
private int mActualDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
private int mReportedDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
private int mPreviousDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
private boolean mUpdatesStopped;
private final boolean mAllowTheaterModeWakeFromDock;
private final List mExtconStateConfigs;
static final class ExtconStateProvider {
private final Map mState;
ExtconStateProvider(Map state) {
mState = state;
}
String getValue(String key) {
return mState.get(key);
}
static ExtconStateProvider fromString(String stateString) {
Map states = new HashMap<>();
String[] lines = stateString.split("\n");
for (String line : lines) {
String[] fields = line.split("=");
if (fields.length == 2) {
states.put(fields[0], fields[1]);
} else {
Slog.e(TAG, "Invalid line: " + line);
}
}
return new ExtconStateProvider(states);
}
static ExtconStateProvider fromFile(String stateFilePath) {
char[] buffer = new char[1024];
try (FileReader file = new FileReader(stateFilePath)) {
int len = file.read(buffer, 0, 1024);
String stateString = (new String(buffer, 0, len)).trim();
return ExtconStateProvider.fromString(stateString);
} catch (FileNotFoundException e) {
Slog.w(TAG, "No state file found at: " + stateFilePath);
return new ExtconStateProvider(new HashMap<>());
} catch (Exception e) {
Slog.e(TAG, "" , e);
return new ExtconStateProvider(new HashMap<>());
}
}
}
/**
* Represents a mapping from extcon state to EXTRA_DOCK_STATE value. Each
* instance corresponds to an entry in config_dockExtconStateMapping.
*/
private static final class ExtconStateConfig {
// The EXTRA_DOCK_STATE that will be used if the extcon key-value pairs match
public final int extraStateValue;
// A list of key-value pairs that must be present in the extcon state for a match
// to be considered. An empty list is considered a matching wildcard.
public final List> keyValuePairs = new ArrayList<>();
ExtconStateConfig(int extraStateValue) {
this.extraStateValue = extraStateValue;
}
}
private static List loadExtconStateConfigs(Context context) {
String[] rows = context.getResources().getStringArray(
com.android.internal.R.array.config_dockExtconStateMapping);
try {
ArrayList configs = new ArrayList<>();
for (String row : rows) {
String[] rowFields = row.split(",");
ExtconStateConfig config = new ExtconStateConfig(Integer.parseInt(rowFields[0]));
for (int i = 1; i < rowFields.length; i++) {
String[] keyValueFields = rowFields[i].split("=");
if (keyValueFields.length != 2) {
throw new IllegalArgumentException("Invalid key-value: " + rowFields[i]);
}
config.keyValuePairs.add(Pair.create(keyValueFields[0], keyValueFields[1]));
}
configs.add(config);
}
return configs;
} catch (IllegalArgumentException | ArrayIndexOutOfBoundsException e) {
Slog.e(TAG, "Could not parse extcon state config", e);
return new ArrayList<>();
}
}
public DockObserver(Context context) {
super(context);
mPowerManager = (PowerManager)context.getSystemService(Context.POWER_SERVICE);
mWakeLock = mPowerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
mAllowTheaterModeWakeFromDock = context.getResources().getBoolean(
com.android.internal.R.bool.config_allowTheaterModeWakeFromDock);
mExtconStateConfigs = loadExtconStateConfigs(context);
List infos = ExtconInfo.getExtconInfoForTypes(new String[] {
ExtconInfo.EXTCON_DOCK
});
if (!infos.isEmpty()) {
ExtconInfo info = infos.get(0);
Slog.i(TAG, "Found extcon info devPath: " + info.getDevicePath()
+ ", statePath: " + info.getStatePath());
// set initial status
setDockStateFromProviderLocked(ExtconStateProvider.fromFile(info.getStatePath()));
mPreviousDockState = mActualDockState;
mExtconUEventObserver.startObserving(info);
} else {
Slog.i(TAG, "No extcon dock device found in this kernel.");
}
}
@Override
public void onStart() {
publishBinderService(TAG, new BinderService());
}
@Override
public void onBootPhase(int phase) {
if (phase == PHASE_ACTIVITY_MANAGER_READY) {
synchronized (mLock) {
mSystemReady = true;
// don't bother broadcasting undocked here
if (mReportedDockState != Intent.EXTRA_DOCK_STATE_UNDOCKED) {
updateLocked();
}
}
}
}
private void setActualDockStateLocked(int newState) {
mActualDockState = newState;
if (!mUpdatesStopped) {
setDockStateLocked(newState);
}
}
private void setDockStateLocked(int newState) {
if (newState != mReportedDockState) {
mReportedDockState = newState;
if (mSystemReady) {
// Wake up immediately when docked or undocked except in theater mode.
if (mAllowTheaterModeWakeFromDock
|| Settings.Global.getInt(getContext().getContentResolver(),
Settings.Global.THEATER_MODE_ON, 0) == 0) {
mPowerManager.wakeUp(SystemClock.uptimeMillis(),
"android.server:DOCK");
}
updateLocked();
}
}
}
private void updateLocked() {
mWakeLock.acquire();
mHandler.sendEmptyMessage(MSG_DOCK_STATE_CHANGED);
}
private void handleDockStateChange() {
synchronized (mLock) {
Slog.i(TAG, "Dock state changed from " + mPreviousDockState + " to "
+ mReportedDockState);
final int previousDockState = mPreviousDockState;
mPreviousDockState = mReportedDockState;
// Skip the dock intent if not yet provisioned.
final ContentResolver cr = getContext().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, mReportedDockState);
boolean dockSoundsEnabled = Settings.Global.getInt(cr,
Settings.Global.DOCK_SOUNDS_ENABLED, 1) == 1;
boolean dockSoundsEnabledWhenAccessibility = Settings.Global.getInt(cr,
Settings.Global.DOCK_SOUNDS_ENABLED_WHEN_ACCESSIBILITY, 1) == 1;
boolean accessibilityEnabled = Settings.Secure.getInt(cr,
Settings.Secure.ACCESSIBILITY_ENABLED, 0) == 1;
// Play a sound to provide feedback to confirm dock connection.
// Particularly useful for flaky contact pins...
if ((dockSoundsEnabled) ||
(accessibilityEnabled && dockSoundsEnabledWhenAccessibility)) {
String whichSound = null;
if (mReportedDockState == Intent.EXTRA_DOCK_STATE_UNDOCKED) {
if ((previousDockState == Intent.EXTRA_DOCK_STATE_DESK) ||
(previousDockState == Intent.EXTRA_DOCK_STATE_LE_DESK) ||
(previousDockState == Intent.EXTRA_DOCK_STATE_HE_DESK)) {
whichSound = Settings.Global.DESK_UNDOCK_SOUND;
} else if (previousDockState == Intent.EXTRA_DOCK_STATE_CAR) {
whichSound = Settings.Global.CAR_UNDOCK_SOUND;
}
} else {
if ((mReportedDockState == Intent.EXTRA_DOCK_STATE_DESK) ||
(mReportedDockState == Intent.EXTRA_DOCK_STATE_LE_DESK) ||
(mReportedDockState == Intent.EXTRA_DOCK_STATE_HE_DESK)) {
whichSound = Settings.Global.DESK_DOCK_SOUND;
} else if (mReportedDockState == 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(
getContext(), 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.
getContext().sendStickyBroadcastAsUser(intent, UserHandle.ALL);
}
}
private final Handler mHandler = new Handler(true /*async*/) {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_DOCK_STATE_CHANGED:
handleDockStateChange();
mWakeLock.release();
break;
}
}
};
private int getDockedStateExtraValue(ExtconStateProvider state) {
for (ExtconStateConfig config : mExtconStateConfigs) {
boolean match = true;
for (Pair keyValue : config.keyValuePairs) {
String stateValue = state.getValue(keyValue.first);
match = match && keyValue.second.equals(stateValue);
if (!match) {
break;
}
}
if (match) {
return config.extraStateValue;
}
}
return Intent.EXTRA_DOCK_STATE_DESK;
}
@VisibleForTesting
void setDockStateFromProviderForTesting(ExtconStateProvider provider) {
synchronized (mLock) {
setDockStateFromProviderLocked(provider);
}
}
private void setDockStateFromProviderLocked(ExtconStateProvider provider) {
int state = Intent.EXTRA_DOCK_STATE_UNDOCKED;
if ("1".equals(provider.getValue("DOCK"))) {
state = getDockedStateExtraValue(provider);
}
setActualDockStateLocked(state);
}
private final ExtconUEventObserver mExtconUEventObserver = new ExtconUEventObserver() {
@Override
public void onUEvent(ExtconInfo extconInfo, UEventObserver.UEvent event) {
synchronized (mLock) {
String stateString = event.get("STATE");
if (stateString != null) {
setDockStateFromProviderLocked(ExtconStateProvider.fromString(stateString));
} else {
Slog.e(TAG, "Extcon event missing STATE: " + event);
}
}
}
};
private final class BinderService extends Binder {
@Override
protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
if (!DumpUtils.checkDumpPermission(getContext(), TAG, pw)) return;
final long ident = Binder.clearCallingIdentity();
try {
synchronized (mLock) {
if (args == null || args.length == 0 || "-a".equals(args[0])) {
pw.println("Current Dock Observer Service state:");
if (mUpdatesStopped) {
pw.println(" (UPDATES STOPPED -- use 'reset' to restart)");
}
pw.println(" reported state: " + mReportedDockState);
pw.println(" previous state: " + mPreviousDockState);
pw.println(" actual state: " + mActualDockState);
} else if (args.length == 3 && "set".equals(args[0])) {
String key = args[1];
String value = args[2];
try {
if ("state".equals(key)) {
mUpdatesStopped = true;
setDockStateLocked(Integer.parseInt(value));
} else {
pw.println("Unknown set option: " + key);
}
} catch (NumberFormatException ex) {
pw.println("Bad value: " + value);
}
} else if (args.length == 1 && "reset".equals(args[0])) {
mUpdatesStopped = false;
setDockStateLocked(mActualDockState);
} else {
pw.println("Dump current dock state, or:");
pw.println(" set state ");
pw.println(" reset");
}
}
} finally {
Binder.restoreCallingIdentity(ident);
}
}
}
}
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