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/*
* Copyright (C) 2007 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 android.server.search;
import com.android.internal.content.PackageMonitor;
import android.app.ISearchManager;
import android.app.SearchManager;
import android.app.SearchableInfo;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.ResolveInfo;
import android.database.ContentObserver;
import android.os.Process;
import android.provider.Settings;
import android.util.Log;
import java.util.List;
/**
* The search manager service handles the search UI, and maintains a registry of searchable
* activities.
*/
public class SearchManagerService extends ISearchManager.Stub {
// general debugging support
private static final String TAG = "SearchManagerService";
// Context that the service is running in.
private final Context mContext;
// This field is initialized lazily in getSearchables(), and then never modified.
private Searchables mSearchables;
private ContentObserver mGlobalSearchObserver;
/**
* Initializes the Search Manager service in the provided system context.
* Only one instance of this object should be created!
*
* @param context to use for accessing DB, window manager, etc.
*/
public SearchManagerService(Context context) {
mContext = context;
mContext.registerReceiver(new BootCompletedReceiver(),
new IntentFilter(Intent.ACTION_BOOT_COMPLETED));
mGlobalSearchObserver = new GlobalSearchProviderObserver(
mContext.getContentResolver());
}
private synchronized Searchables getSearchables() {
if (mSearchables == null) {
Log.i(TAG, "Building list of searchable activities");
new MyPackageMonitor().register(mContext, true);
mSearchables = new Searchables(mContext);
mSearchables.buildSearchableList();
}
return mSearchables;
}
/**
* Creates the initial searchables list after boot.
*/
private final class BootCompletedReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
new Thread() {
@Override
public void run() {
Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND);
mContext.unregisterReceiver(BootCompletedReceiver.this);
getSearchables();
}
}.start();
}
}
/**
* Refreshes the "searchables" list when packages are added/removed.
*/
class MyPackageMonitor extends PackageMonitor {
@Override
public void onSomePackagesChanged() {
// Update list of searchable activities
getSearchables().buildSearchableList();
// Inform all listeners that the list of searchables has been updated.
Intent intent = new Intent(SearchManager.INTENT_ACTION_SEARCHABLES_CHANGED);
intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
mContext.sendBroadcast(intent);
}
}
class GlobalSearchProviderObserver extends ContentObserver {
private final ContentResolver mResolver;
public GlobalSearchProviderObserver(ContentResolver resolver) {
super(null);
mResolver = resolver;
mResolver.registerContentObserver(
Settings.Secure.getUriFor(Settings.Secure.SEARCH_GLOBAL_SEARCH_ACTIVITY),
false /* notifyDescendants */,
this);
}
@Override
public void onChange(boolean selfChange) {
getSearchables().buildSearchableList();
Intent intent = new Intent(SearchManager.INTENT_GLOBAL_SEARCH_ACTIVITY_CHANGED);
intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
mContext.sendBroadcast(intent);
}
}
//
// Searchable activities API
//
/**
* Returns the SearchableInfo for a given activity.
*
* @param launchActivity The activity from which we're launching this search.
* @return Returns a SearchableInfo record describing the parameters of the search,
* or null if no searchable metadata was available.
*/
public SearchableInfo getSearchableInfo(final ComponentName launchActivity) {
if (launchActivity == null) {
Log.e(TAG, "getSearchableInfo(), activity == null");
return null;
}
return getSearchables().getSearchableInfo(launchActivity);
}
/**
* Returns a list of the searchable activities that can be included in global search.
*/
public List<SearchableInfo> getSearchablesInGlobalSearch() {
return getSearchables().getSearchablesInGlobalSearchList();
}
public List<ResolveInfo> getGlobalSearchActivities() {
return getSearchables().getGlobalSearchActivities();
}
/**
* Gets the name of the global search activity.
*/
public ComponentName getGlobalSearchActivity() {
return getSearchables().getGlobalSearchActivity();
}
/**
* Gets the name of the web search activity.
*/
public ComponentName getWebSearchActivity() {
return getSearchables().getWebSearchActivity();
}
}
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