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/*
* Copyright (C) 2015 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.telecom;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import com.android.internal.util.IndentingPrintWriter;
import java.util.Collections;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
/** Listens for and caches car dock state. */
class DockManager {
interface Listener {
void onDockChanged(boolean isDocked);
}
/** Receiver for car dock plugged and unplugged events. */
private class DockBroadcastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
if (Intent.ACTION_DOCK_EVENT.equals(intent.getAction())) {
int dockState = intent.getIntExtra(
Intent.EXTRA_DOCK_STATE, Intent.EXTRA_DOCK_STATE_UNDOCKED);
onDockChanged(dockState);
}
}
}
private final DockBroadcastReceiver mReceiver;
/**
* ConcurrentHashMap constructor params: 8 is initial table size, 0.9f is
* load factor before resizing, 1 means we only expect a single thread to
* access the map so make only a single shard
*/
private final Set<Listener> mListeners = Collections.newSetFromMap(
new ConcurrentHashMap<Listener, Boolean>(8, 0.9f, 1));
private int mDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
DockManager(Context context) {
mReceiver = new DockBroadcastReceiver();
// Register for misc other intent broadcasts.
IntentFilter intentFilter = new IntentFilter(Intent.ACTION_DOCK_EVENT);
context.registerReceiver(mReceiver, intentFilter);
}
void addListener(Listener listener) {
mListeners.add(listener);
}
void removeListener(Listener listener) {
if (listener != null) {
mListeners.remove(listener);
}
}
boolean isDocked() {
switch (mDockState) {
case Intent.EXTRA_DOCK_STATE_DESK:
case Intent.EXTRA_DOCK_STATE_HE_DESK:
case Intent.EXTRA_DOCK_STATE_LE_DESK:
case Intent.EXTRA_DOCK_STATE_CAR:
return true;
default:
return false;
}
}
private void onDockChanged(int dockState) {
if (mDockState != dockState) {
Log.v(this, "onDockChanged: is docked?%b", dockState == Intent.EXTRA_DOCK_STATE_CAR);
mDockState = dockState;
for (Listener listener : mListeners) {
listener.onDockChanged(isDocked());
}
}
}
/**
* Dumps the state of the {@link DockManager}.
*
* @param pw The {@code IndentingPrintWriter} to write the state to.
*/
public void dump(IndentingPrintWriter pw) {
pw.println("mIsDocked: " + isDocked());
}
}
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