1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.server.search;
18
19import android.app.ActivityManager;
20import android.app.AppGlobals;
21import android.app.IActivityManager;
22import android.app.ISearchManager;
23import android.app.SearchManager;
24import android.app.SearchableInfo;
25import android.content.ComponentName;
26import android.content.ContentResolver;
27import android.content.Context;
28import android.content.Intent;
29import android.content.pm.IPackageManager;
30import android.content.pm.PackageManager;
31import android.content.pm.ResolveInfo;
32import android.database.ContentObserver;
33import android.os.Binder;
34import android.os.Bundle;
35import android.os.Handler;
36import android.os.RemoteException;
37import android.os.UserHandle;
38import android.os.UserManager;
39import android.provider.Settings;
40import android.util.Log;
41import android.util.SparseArray;
42
43import com.android.internal.annotations.GuardedBy;
44import com.android.internal.content.PackageMonitor;
45import com.android.internal.os.BackgroundThread;
46import com.android.internal.util.DumpUtils;
47import com.android.internal.util.IndentingPrintWriter;
48import com.android.server.LocalServices;
49import com.android.server.SystemService;
50import com.android.server.statusbar.StatusBarManagerInternal;
51
52import java.io.FileDescriptor;
53import java.io.PrintWriter;
54import java.util.List;
55
56/**
57 * The search manager service handles the search UI, and maintains a registry of
58 * searchable activities.
59 */
60public class SearchManagerService extends ISearchManager.Stub {
61    private static final String TAG = "SearchManagerService";
62    final Handler mHandler;
63
64    public static class Lifecycle extends SystemService {
65        private SearchManagerService mService;
66
67        public Lifecycle(Context context) {
68            super(context);
69        }
70
71        @Override
72        public void onStart() {
73            mService = new SearchManagerService(getContext());
74            publishBinderService(Context.SEARCH_SERVICE, mService);
75        }
76
77        @Override
78        public void onUnlockUser(final int userId) {
79            mService.mHandler.post(new Runnable() {
80                @Override
81                public void run() {
82                    mService.onUnlockUser(userId);
83                }
84            });
85        }
86
87        @Override
88        public void onCleanupUser(int userHandle) {
89            mService.onCleanupUser(userHandle);
90        }
91    }
92
93    // Context that the service is running in.
94    private final Context mContext;
95
96    // This field is initialized lazily in getSearchables(), and then never modified.
97    @GuardedBy("mSearchables")
98    private final SparseArray<Searchables> mSearchables = new SparseArray<>();
99
100    /**
101     * Initializes the Search Manager service in the provided system context.
102     * Only one instance of this object should be created!
103     *
104     * @param context to use for accessing DB, window manager, etc.
105     */
106    public SearchManagerService(Context context)  {
107        mContext = context;
108        new MyPackageMonitor().register(context, null, UserHandle.ALL, true);
109        new GlobalSearchProviderObserver(context.getContentResolver());
110        mHandler = BackgroundThread.getHandler();
111    }
112
113    private Searchables getSearchables(int userId) {
114        return getSearchables(userId, false);
115    }
116
117    private Searchables getSearchables(int userId, boolean forceUpdate) {
118        final long token = Binder.clearCallingIdentity();
119        try {
120            final UserManager um = mContext.getSystemService(UserManager.class);
121            if (um.getUserInfo(userId) == null) {
122                throw new IllegalStateException("User " + userId + " doesn't exist");
123            }
124            if (!um.isUserUnlockingOrUnlocked(userId)) {
125                throw new IllegalStateException("User " + userId + " isn't unlocked");
126            }
127        } finally {
128            Binder.restoreCallingIdentity(token);
129        }
130        synchronized (mSearchables) {
131            Searchables searchables = mSearchables.get(userId);
132            if (searchables == null) {
133                searchables = new Searchables(mContext, userId);
134                searchables.updateSearchableList();
135                mSearchables.append(userId, searchables);
136            } else if (forceUpdate) {
137                searchables.updateSearchableList();
138            }
139            return searchables;
140        }
141    }
142
143    private void onUnlockUser(int userId) {
144        try {
145            getSearchables(userId, true);
146        } catch (IllegalStateException ignored) {
147            // We're just trying to warm a cache, so we don't mind if the user
148            // was stopped or destroyed before we got here.
149        }
150    }
151
152    private void onCleanupUser(int userId) {
153        synchronized (mSearchables) {
154            mSearchables.remove(userId);
155        }
156    }
157
158    /**
159     * Refreshes the "searchables" list when packages are added/removed.
160     */
161    class MyPackageMonitor extends PackageMonitor {
162
163        @Override
164        public void onSomePackagesChanged() {
165            updateSearchables();
166        }
167
168        @Override
169        public void onPackageModified(String pkg) {
170            updateSearchables();
171        }
172
173        private void updateSearchables() {
174            final int changingUserId = getChangingUserId();
175            synchronized (mSearchables) {
176                // Update list of searchable activities
177                for (int i = 0; i < mSearchables.size(); i++) {
178                    if (changingUserId == mSearchables.keyAt(i)) {
179                        mSearchables.valueAt(i).updateSearchableList();
180                        break;
181                    }
182                }
183            }
184            // Inform all listeners that the list of searchables has been updated.
185            Intent intent = new Intent(SearchManager.INTENT_ACTION_SEARCHABLES_CHANGED);
186            intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING
187                    | Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
188            mContext.sendBroadcastAsUser(intent, new UserHandle(changingUserId));
189        }
190    }
191
192    class GlobalSearchProviderObserver extends ContentObserver {
193        private final ContentResolver mResolver;
194
195        public GlobalSearchProviderObserver(ContentResolver resolver) {
196            super(null);
197            mResolver = resolver;
198            mResolver.registerContentObserver(
199                    Settings.Secure.getUriFor(Settings.Secure.SEARCH_GLOBAL_SEARCH_ACTIVITY),
200                    false /* notifyDescendants */,
201                    this);
202        }
203
204        @Override
205        public void onChange(boolean selfChange) {
206            synchronized (mSearchables) {
207                for (int i = 0; i < mSearchables.size(); i++) {
208                    mSearchables.valueAt(i).updateSearchableList();
209                }
210            }
211            Intent intent = new Intent(SearchManager.INTENT_GLOBAL_SEARCH_ACTIVITY_CHANGED);
212            intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
213            mContext.sendBroadcastAsUser(intent, UserHandle.ALL);
214        }
215    }
216
217    //
218    // Searchable activities API
219    //
220
221    /**
222     * Returns the SearchableInfo for a given activity.
223     *
224     * @param launchActivity The activity from which we're launching this search.
225     * @return Returns a SearchableInfo record describing the parameters of the search,
226     * or null if no searchable metadata was available.
227     */
228    @Override
229    public SearchableInfo getSearchableInfo(final ComponentName launchActivity) {
230        if (launchActivity == null) {
231            Log.e(TAG, "getSearchableInfo(), activity == null");
232            return null;
233        }
234        return getSearchables(UserHandle.getCallingUserId()).getSearchableInfo(launchActivity);
235    }
236
237    /**
238     * Returns a list of the searchable activities that can be included in global search.
239     */
240    @Override
241    public List<SearchableInfo> getSearchablesInGlobalSearch() {
242        return getSearchables(UserHandle.getCallingUserId()).getSearchablesInGlobalSearchList();
243    }
244
245    @Override
246    public List<ResolveInfo> getGlobalSearchActivities() {
247        return getSearchables(UserHandle.getCallingUserId()).getGlobalSearchActivities();
248    }
249
250    /**
251     * Gets the name of the global search activity.
252     */
253    @Override
254    public ComponentName getGlobalSearchActivity() {
255        return getSearchables(UserHandle.getCallingUserId()).getGlobalSearchActivity();
256    }
257
258    /**
259     * Gets the name of the web search activity.
260     */
261    @Override
262    public ComponentName getWebSearchActivity() {
263        return getSearchables(UserHandle.getCallingUserId()).getWebSearchActivity();
264    }
265
266    @Override
267    public void launchAssist(Bundle args) {
268        StatusBarManagerInternal statusBarManager =
269                LocalServices.getService(StatusBarManagerInternal.class);
270        if (statusBarManager != null) {
271            statusBarManager.startAssist(args);
272        }
273    }
274
275    private ComponentName getLegacyAssistComponent(int userHandle) {
276        try {
277            userHandle = ActivityManager.handleIncomingUser(Binder.getCallingPid(),
278                    Binder.getCallingUid(), userHandle, true, false, "getLegacyAssistComponent", null);
279            IPackageManager pm = AppGlobals.getPackageManager();
280            Intent assistIntent = new Intent(Intent.ACTION_ASSIST);
281            ResolveInfo info =
282                    pm.resolveIntent(assistIntent,
283                            assistIntent.resolveTypeIfNeeded(mContext.getContentResolver()),
284                            PackageManager.MATCH_DEFAULT_ONLY, userHandle);
285            if (info != null) {
286                return new ComponentName(
287                        info.activityInfo.applicationInfo.packageName,
288                        info.activityInfo.name);
289            }
290        } catch (RemoteException re) {
291            // Local call
292            Log.e(TAG, "RemoteException in getLegacyAssistComponent: " + re);
293        } catch (Exception e) {
294            Log.e(TAG, "Exception in getLegacyAssistComponent: " + e);
295        }
296        return null;
297    }
298
299    @Override
300    public boolean launchLegacyAssist(String hint, int userHandle, Bundle args) {
301        ComponentName comp = getLegacyAssistComponent(userHandle);
302        if (comp == null) {
303            return false;
304        }
305        long ident = Binder.clearCallingIdentity();
306        try {
307            Intent intent = new Intent(Intent.ACTION_ASSIST);
308            intent.setComponent(comp);
309            IActivityManager am = ActivityManager.getService();
310            return am.launchAssistIntent(intent, ActivityManager.ASSIST_CONTEXT_BASIC, hint,
311                    userHandle, args);
312        } catch (RemoteException e) {
313        } finally {
314            Binder.restoreCallingIdentity(ident);
315        }
316        return true;
317    }
318
319    @Override
320    public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
321        if (!DumpUtils.checkDumpPermission(mContext, TAG, pw)) return;
322
323        IndentingPrintWriter ipw = new IndentingPrintWriter(pw, "  ");
324        synchronized (mSearchables) {
325            for (int i = 0; i < mSearchables.size(); i++) {
326                ipw.print("\nUser: "); ipw.println(mSearchables.keyAt(i));
327                ipw.increaseIndent();
328                mSearchables.valueAt(i).dump(fd, ipw, args);
329                ipw.decreaseIndent();
330            }
331        }
332    }
333}
334