1 /* 2 * Copyright (C) 2011 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 17 package com.android.server; 18 19 import com.android.internal.annotations.GuardedBy; 20 import com.android.internal.content.PackageMonitor; 21 import com.android.internal.inputmethod.InputMethodUtils; 22 import com.android.internal.textservice.ISpellCheckerService; 23 import com.android.internal.textservice.ISpellCheckerSession; 24 import com.android.internal.textservice.ISpellCheckerSessionListener; 25 import com.android.internal.textservice.ITextServicesManager; 26 import com.android.internal.textservice.ITextServicesSessionListener; 27 28 import org.xmlpull.v1.XmlPullParserException; 29 30 import android.annotation.NonNull; 31 import android.annotation.Nullable; 32 import android.annotation.UserIdInt; 33 import android.app.ActivityManagerNative; 34 import android.app.AppGlobals; 35 import android.content.BroadcastReceiver; 36 import android.content.ComponentName; 37 import android.content.ContentResolver; 38 import android.content.Context; 39 import android.content.Intent; 40 import android.content.IntentFilter; 41 import android.content.ServiceConnection; 42 import android.content.pm.ApplicationInfo; 43 import android.content.pm.PackageManager; 44 import android.content.pm.ResolveInfo; 45 import android.content.pm.ServiceInfo; 46 import android.os.Binder; 47 import android.os.Bundle; 48 import android.os.IBinder; 49 import android.os.Process; 50 import android.os.RemoteException; 51 import android.os.UserHandle; 52 import android.os.UserManager; 53 import android.provider.Settings; 54 import android.service.textservice.SpellCheckerService; 55 import android.text.TextUtils; 56 import android.util.Slog; 57 import android.view.inputmethod.InputMethodManager; 58 import android.view.inputmethod.InputMethodSubtype; 59 import android.view.textservice.SpellCheckerInfo; 60 import android.view.textservice.SpellCheckerSubtype; 61 62 import java.io.FileDescriptor; 63 import java.io.IOException; 64 import java.io.PrintWriter; 65 import java.util.Arrays; 66 import java.util.ArrayList; 67 import java.util.HashMap; 68 import java.util.List; 69 import java.util.Locale; 70 import java.util.Map; 71 import java.util.concurrent.CopyOnWriteArrayList; 72 73 public class TextServicesManagerService extends ITextServicesManager.Stub { 74 private static final String TAG = TextServicesManagerService.class.getSimpleName(); 75 private static final boolean DBG = false; 76 77 private final Context mContext; 78 private boolean mSystemReady; 79 private final TextServicesMonitor mMonitor; 80 private final HashMap<String, SpellCheckerInfo> mSpellCheckerMap = new HashMap<>(); 81 private final ArrayList<SpellCheckerInfo> mSpellCheckerList = new ArrayList<>(); 82 private final HashMap<String, SpellCheckerBindGroup> mSpellCheckerBindGroups = new HashMap<>(); 83 private final TextServicesSettings mSettings; 84 @NonNull 85 private final UserManager mUserManager; 86 87 public static final class Lifecycle extends SystemService { 88 private TextServicesManagerService mService; 89 90 public Lifecycle(Context context) { 91 super(context); 92 mService = new TextServicesManagerService(context); 93 } 94 95 @Override 96 public void onStart() { 97 publishBinderService(Context.TEXT_SERVICES_MANAGER_SERVICE, mService); 98 } 99 100 @Override 101 public void onSwitchUser(@UserIdInt int userHandle) { 102 // Called on the system server's main looper thread. 103 // TODO: Dispatch this to a worker thread as needed. 104 mService.onSwitchUser(userHandle); 105 } 106 107 @Override 108 public void onBootPhase(int phase) { 109 // Called on the system server's main looper thread. 110 // TODO: Dispatch this to a worker thread as needed. 111 if (phase == SystemService.PHASE_ACTIVITY_MANAGER_READY) { 112 mService.systemRunning(); 113 } 114 } 115 116 @Override 117 public void onUnlockUser(@UserIdInt int userHandle) { 118 // Called on the system server's main looper thread. 119 // TODO: Dispatch this to a worker thread as needed. 120 mService.onUnlockUser(userHandle); 121 } 122 } 123 124 void systemRunning() { 125 synchronized (mSpellCheckerMap) { 126 if (!mSystemReady) { 127 mSystemReady = true; 128 resetInternalState(mSettings.getCurrentUserId()); 129 } 130 } 131 } 132 133 void onSwitchUser(@UserIdInt int userId) { 134 synchronized (mSpellCheckerMap) { 135 resetInternalState(userId); 136 } 137 } 138 139 void onUnlockUser(@UserIdInt int userId) { 140 synchronized(mSpellCheckerMap) { 141 final int currentUserId = mSettings.getCurrentUserId(); 142 if (userId != currentUserId) { 143 return; 144 } 145 resetInternalState(currentUserId); 146 } 147 } 148 149 public TextServicesManagerService(Context context) { 150 mSystemReady = false; 151 mContext = context; 152 153 mUserManager = mContext.getSystemService(UserManager.class); 154 155 final IntentFilter broadcastFilter = new IntentFilter(); 156 broadcastFilter.addAction(Intent.ACTION_USER_ADDED); 157 broadcastFilter.addAction(Intent.ACTION_USER_REMOVED); 158 mContext.registerReceiver(new TextServicesBroadcastReceiver(), broadcastFilter); 159 160 int userId = UserHandle.USER_SYSTEM; 161 try { 162 userId = ActivityManagerNative.getDefault().getCurrentUser().id; 163 } catch (RemoteException e) { 164 Slog.w(TAG, "Couldn't get current user ID; guessing it's 0", e); 165 } 166 mMonitor = new TextServicesMonitor(); 167 mMonitor.register(context, null, true); 168 final boolean useCopyOnWriteSettings = 169 !mSystemReady || !mUserManager.isUserUnlockingOrUnlocked(userId); 170 mSettings = new TextServicesSettings(context.getContentResolver(), userId, 171 useCopyOnWriteSettings); 172 173 // "resetInternalState" initializes the states for the foreground user 174 resetInternalState(userId); 175 } 176 177 private void resetInternalState(@UserIdInt int userId) { 178 final boolean useCopyOnWriteSettings = 179 !mSystemReady || !mUserManager.isUserUnlockingOrUnlocked(userId); 180 mSettings.switchCurrentUser(userId, useCopyOnWriteSettings); 181 updateCurrentProfileIds(); 182 unbindServiceLocked(); 183 buildSpellCheckerMapLocked(mContext, mSpellCheckerList, mSpellCheckerMap, mSettings); 184 SpellCheckerInfo sci = getCurrentSpellChecker(null); 185 if (sci == null) { 186 sci = findAvailSpellCheckerLocked(null); 187 if (sci != null) { 188 // Set the current spell checker if there is one or more spell checkers 189 // available. In this case, "sci" is the first one in the available spell 190 // checkers. 191 setCurrentSpellCheckerLocked(sci.getId()); 192 } 193 } 194 } 195 196 void updateCurrentProfileIds() { 197 mSettings.setCurrentProfileIds( 198 mUserManager.getProfileIdsWithDisabled(mSettings.getCurrentUserId())); 199 } 200 201 private class TextServicesMonitor extends PackageMonitor { 202 private boolean isChangingPackagesOfCurrentUser() { 203 final int userId = getChangingUserId(); 204 final boolean retval = userId == mSettings.getCurrentUserId(); 205 if (DBG) { 206 Slog.d(TAG, "--- ignore this call back from a background user: " + userId); 207 } 208 return retval; 209 } 210 211 @Override 212 public void onSomePackagesChanged() { 213 if (!isChangingPackagesOfCurrentUser()) { 214 return; 215 } 216 synchronized (mSpellCheckerMap) { 217 buildSpellCheckerMapLocked( 218 mContext, mSpellCheckerList, mSpellCheckerMap, mSettings); 219 // TODO: Update for each locale 220 SpellCheckerInfo sci = getCurrentSpellChecker(null); 221 // If no spell checker is enabled, just return. The user should explicitly 222 // enable the spell checker. 223 if (sci == null) return; 224 final String packageName = sci.getPackageName(); 225 final int change = isPackageDisappearing(packageName); 226 if (// Package disappearing 227 change == PACKAGE_PERMANENT_CHANGE || change == PACKAGE_TEMPORARY_CHANGE 228 // Package modified 229 || isPackageModified(packageName)) { 230 sci = findAvailSpellCheckerLocked(packageName); 231 if (sci != null) { 232 setCurrentSpellCheckerLocked(sci.getId()); 233 } 234 } 235 } 236 } 237 } 238 239 class TextServicesBroadcastReceiver extends BroadcastReceiver { 240 @Override 241 public void onReceive(Context context, Intent intent) { 242 final String action = intent.getAction(); 243 if (Intent.ACTION_USER_ADDED.equals(action) 244 || Intent.ACTION_USER_REMOVED.equals(action)) { 245 updateCurrentProfileIds(); 246 return; 247 } 248 Slog.w(TAG, "Unexpected intent " + intent); 249 } 250 } 251 252 private static void buildSpellCheckerMapLocked(Context context, 253 ArrayList<SpellCheckerInfo> list, HashMap<String, SpellCheckerInfo> map, 254 TextServicesSettings settings) { 255 list.clear(); 256 map.clear(); 257 final PackageManager pm = context.getPackageManager(); 258 // Note: We do not specify PackageManager.MATCH_ENCRYPTION_* flags here because the default 259 // behavior of PackageManager is exactly what we want. It by default picks up appropriate 260 // services depending on the unlock state for the specified user. 261 final List<ResolveInfo> services = pm.queryIntentServicesAsUser( 262 new Intent(SpellCheckerService.SERVICE_INTERFACE), PackageManager.GET_META_DATA, 263 settings.getCurrentUserId()); 264 final int N = services.size(); 265 for (int i = 0; i < N; ++i) { 266 final ResolveInfo ri = services.get(i); 267 final ServiceInfo si = ri.serviceInfo; 268 final ComponentName compName = new ComponentName(si.packageName, si.name); 269 if (!android.Manifest.permission.BIND_TEXT_SERVICE.equals(si.permission)) { 270 Slog.w(TAG, "Skipping text service " + compName 271 + ": it does not require the permission " 272 + android.Manifest.permission.BIND_TEXT_SERVICE); 273 continue; 274 } 275 if (DBG) Slog.d(TAG, "Add: " + compName); 276 try { 277 final SpellCheckerInfo sci = new SpellCheckerInfo(context, ri); 278 if (sci.getSubtypeCount() <= 0) { 279 Slog.w(TAG, "Skipping text service " + compName 280 + ": it does not contain subtypes."); 281 continue; 282 } 283 list.add(sci); 284 map.put(sci.getId(), sci); 285 } catch (XmlPullParserException e) { 286 Slog.w(TAG, "Unable to load the spell checker " + compName, e); 287 } catch (IOException e) { 288 Slog.w(TAG, "Unable to load the spell checker " + compName, e); 289 } 290 } 291 if (DBG) { 292 Slog.d(TAG, "buildSpellCheckerMapLocked: " + list.size() + "," + map.size()); 293 } 294 } 295 296 // --------------------------------------------------------------------------------------- 297 // Check whether or not this is a valid IPC. Assumes an IPC is valid when either 298 // 1) it comes from the system process 299 // 2) the calling process' user id is identical to the current user id TSMS thinks. 300 private boolean calledFromValidUser() { 301 final int uid = Binder.getCallingUid(); 302 final int userId = UserHandle.getUserId(uid); 303 if (DBG) { 304 Slog.d(TAG, "--- calledFromForegroundUserOrSystemProcess ? " 305 + "calling uid = " + uid + " system uid = " + Process.SYSTEM_UID 306 + " calling userId = " + userId + ", foreground user id = " 307 + mSettings.getCurrentUserId() + ", calling pid = " + Binder.getCallingPid()); 308 try { 309 final String[] packageNames = AppGlobals.getPackageManager().getPackagesForUid(uid); 310 for (int i = 0; i < packageNames.length; ++i) { 311 if (DBG) { 312 Slog.d(TAG, "--- process name for "+ uid + " = " + packageNames[i]); 313 } 314 } 315 } catch (RemoteException e) { 316 } 317 } 318 319 if (uid == Process.SYSTEM_UID || userId == mSettings.getCurrentUserId()) { 320 return true; 321 } 322 323 // Permits current profile to use TSFM as long as the current text service is the system's 324 // one. This is a tentative solution and should be replaced with fully functional multiuser 325 // support. 326 // TODO: Implement multiuser support in TSMS. 327 final boolean isCurrentProfile = mSettings.isCurrentProfile(userId); 328 if (DBG) { 329 Slog.d(TAG, "--- userId = "+ userId + " isCurrentProfile = " + isCurrentProfile); 330 } 331 if (mSettings.isCurrentProfile(userId)) { 332 final SpellCheckerInfo spellCheckerInfo = getCurrentSpellCheckerWithoutVerification(); 333 if (spellCheckerInfo != null) { 334 final ServiceInfo serviceInfo = spellCheckerInfo.getServiceInfo(); 335 final boolean isSystemSpellChecker = 336 (serviceInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0; 337 if (DBG) { 338 Slog.d(TAG, "--- current spell checker = "+ spellCheckerInfo.getPackageName() 339 + " isSystem = " + isSystemSpellChecker); 340 } 341 if (isSystemSpellChecker) { 342 return true; 343 } 344 } 345 } 346 347 // Unlike InputMethodManagerService#calledFromValidUser, INTERACT_ACROSS_USERS_FULL isn't 348 // taken into account here. Anyway this method is supposed to be removed once multiuser 349 // support is implemented. 350 if (DBG) { 351 Slog.d(TAG, "--- IPC from userId:" + userId + " is being ignored. \n" 352 + getStackTrace()); 353 } 354 return false; 355 } 356 357 private boolean bindCurrentSpellCheckerService( 358 Intent service, ServiceConnection conn, int flags) { 359 if (service == null || conn == null) { 360 Slog.e(TAG, "--- bind failed: service = " + service + ", conn = " + conn); 361 return false; 362 } 363 return mContext.bindServiceAsUser(service, conn, flags, 364 new UserHandle(mSettings.getCurrentUserId())); 365 } 366 367 private void unbindServiceLocked() { 368 for (SpellCheckerBindGroup scbg : mSpellCheckerBindGroups.values()) { 369 scbg.removeAll(); 370 } 371 mSpellCheckerBindGroups.clear(); 372 } 373 374 private SpellCheckerInfo findAvailSpellCheckerLocked(String prefPackage) { 375 final int spellCheckersCount = mSpellCheckerList.size(); 376 if (spellCheckersCount == 0) { 377 Slog.w(TAG, "no available spell checker services found"); 378 return null; 379 } 380 if (prefPackage != null) { 381 for (int i = 0; i < spellCheckersCount; ++i) { 382 final SpellCheckerInfo sci = mSpellCheckerList.get(i); 383 if (prefPackage.equals(sci.getPackageName())) { 384 if (DBG) { 385 Slog.d(TAG, "findAvailSpellCheckerLocked: " + sci.getPackageName()); 386 } 387 return sci; 388 } 389 } 390 } 391 392 // Look up a spell checker based on the system locale. 393 // TODO: Still there is a room to improve in the following logic: e.g., check if the package 394 // is pre-installed or not. 395 final Locale systemLocal = mContext.getResources().getConfiguration().locale; 396 final ArrayList<Locale> suitableLocales = 397 InputMethodUtils.getSuitableLocalesForSpellChecker(systemLocal); 398 if (DBG) { 399 Slog.w(TAG, "findAvailSpellCheckerLocked suitableLocales=" 400 + Arrays.toString(suitableLocales.toArray(new Locale[suitableLocales.size()]))); 401 } 402 final int localeCount = suitableLocales.size(); 403 for (int localeIndex = 0; localeIndex < localeCount; ++localeIndex) { 404 final Locale locale = suitableLocales.get(localeIndex); 405 for (int spellCheckersIndex = 0; spellCheckersIndex < spellCheckersCount; 406 ++spellCheckersIndex) { 407 final SpellCheckerInfo info = mSpellCheckerList.get(spellCheckersIndex); 408 final int subtypeCount = info.getSubtypeCount(); 409 for (int subtypeIndex = 0; subtypeIndex < subtypeCount; ++subtypeIndex) { 410 final SpellCheckerSubtype subtype = info.getSubtypeAt(subtypeIndex); 411 final Locale subtypeLocale = InputMethodUtils.constructLocaleFromString( 412 subtype.getLocale()); 413 if (locale.equals(subtypeLocale)) { 414 // TODO: We may have more spell checkers that fall into this category. 415 // Ideally we should pick up the most suitable one instead of simply 416 // returning the first found one. 417 return info; 418 } 419 } 420 } 421 } 422 423 if (spellCheckersCount > 1) { 424 Slog.w(TAG, "more than one spell checker service found, picking first"); 425 } 426 return mSpellCheckerList.get(0); 427 } 428 429 // TODO: Save SpellCheckerService by supported languages. Currently only one spell 430 // checker is saved. 431 @Override 432 public SpellCheckerInfo getCurrentSpellChecker(String locale) { 433 // TODO: Make this work even for non-current users? 434 if (!calledFromValidUser()) { 435 return null; 436 } 437 return getCurrentSpellCheckerWithoutVerification(); 438 } 439 440 private SpellCheckerInfo getCurrentSpellCheckerWithoutVerification() { 441 synchronized (mSpellCheckerMap) { 442 final String curSpellCheckerId = mSettings.getSelectedSpellChecker(); 443 if (DBG) { 444 Slog.w(TAG, "getCurrentSpellChecker: " + curSpellCheckerId); 445 } 446 if (TextUtils.isEmpty(curSpellCheckerId)) { 447 return null; 448 } 449 return mSpellCheckerMap.get(curSpellCheckerId); 450 } 451 } 452 453 // TODO: Respect allowImplicitlySelectedSubtype 454 // TODO: Save SpellCheckerSubtype by supported languages by looking at "locale". 455 @Override 456 public SpellCheckerSubtype getCurrentSpellCheckerSubtype( 457 String locale, boolean allowImplicitlySelectedSubtype) { 458 // TODO: Make this work even for non-current users? 459 if (!calledFromValidUser()) { 460 return null; 461 } 462 synchronized (mSpellCheckerMap) { 463 final int subtypeHashCode = 464 mSettings.getSelectedSpellCheckerSubtype(SpellCheckerSubtype.SUBTYPE_ID_NONE); 465 if (DBG) { 466 Slog.w(TAG, "getCurrentSpellCheckerSubtype: " + subtypeHashCode); 467 } 468 final SpellCheckerInfo sci = getCurrentSpellChecker(null); 469 if (sci == null || sci.getSubtypeCount() == 0) { 470 if (DBG) { 471 Slog.w(TAG, "Subtype not found."); 472 } 473 return null; 474 } 475 if (subtypeHashCode == SpellCheckerSubtype.SUBTYPE_ID_NONE 476 && !allowImplicitlySelectedSubtype) { 477 return null; 478 } 479 String candidateLocale = null; 480 if (subtypeHashCode == 0) { 481 // Spell checker language settings == "auto" 482 final InputMethodManager imm = mContext.getSystemService(InputMethodManager.class); 483 if (imm != null) { 484 final InputMethodSubtype currentInputMethodSubtype = 485 imm.getCurrentInputMethodSubtype(); 486 if (currentInputMethodSubtype != null) { 487 final String localeString = currentInputMethodSubtype.getLocale(); 488 if (!TextUtils.isEmpty(localeString)) { 489 // 1. Use keyboard locale if available in the spell checker 490 candidateLocale = localeString; 491 } 492 } 493 } 494 if (candidateLocale == null) { 495 // 2. Use System locale if available in the spell checker 496 candidateLocale = mContext.getResources().getConfiguration().locale.toString(); 497 } 498 } 499 SpellCheckerSubtype candidate = null; 500 for (int i = 0; i < sci.getSubtypeCount(); ++i) { 501 final SpellCheckerSubtype scs = sci.getSubtypeAt(i); 502 if (subtypeHashCode == 0) { 503 final String scsLocale = scs.getLocale(); 504 if (candidateLocale.equals(scsLocale)) { 505 return scs; 506 } else if (candidate == null) { 507 if (candidateLocale.length() >= 2 && scsLocale.length() >= 2 508 && candidateLocale.startsWith(scsLocale)) { 509 // Fall back to the applicable language 510 candidate = scs; 511 } 512 } 513 } else if (scs.hashCode() == subtypeHashCode) { 514 if (DBG) { 515 Slog.w(TAG, "Return subtype " + scs.hashCode() + ", input= " + locale 516 + ", " + scs.getLocale()); 517 } 518 // 3. Use the user specified spell check language 519 return scs; 520 } 521 } 522 // 4. Fall back to the applicable language and return it if not null 523 // 5. Simply just return it even if it's null which means we could find no suitable 524 // spell check languages 525 return candidate; 526 } 527 } 528 529 @Override 530 public void getSpellCheckerService(String sciId, String locale, 531 ITextServicesSessionListener tsListener, ISpellCheckerSessionListener scListener, 532 Bundle bundle) { 533 if (!calledFromValidUser()) { 534 return; 535 } 536 if (!mSystemReady) { 537 return; 538 } 539 if (TextUtils.isEmpty(sciId) || tsListener == null || scListener == null) { 540 Slog.e(TAG, "getSpellCheckerService: Invalid input."); 541 return; 542 } 543 synchronized(mSpellCheckerMap) { 544 if (!mSpellCheckerMap.containsKey(sciId)) { 545 return; 546 } 547 final SpellCheckerInfo sci = mSpellCheckerMap.get(sciId); 548 final int uid = Binder.getCallingUid(); 549 if (mSpellCheckerBindGroups.containsKey(sciId)) { 550 final SpellCheckerBindGroup bindGroup = mSpellCheckerBindGroups.get(sciId); 551 if (bindGroup != null) { 552 final InternalDeathRecipient recipient = 553 mSpellCheckerBindGroups.get(sciId).addListener( 554 tsListener, locale, scListener, uid, bundle); 555 if (recipient == null) { 556 if (DBG) { 557 Slog.w(TAG, "Didn't create a death recipient."); 558 } 559 return; 560 } 561 if (bindGroup.mSpellChecker == null & bindGroup.mConnected) { 562 Slog.e(TAG, "The state of the spell checker bind group is illegal."); 563 bindGroup.removeAll(); 564 } else if (bindGroup.mSpellChecker != null) { 565 if (DBG) { 566 Slog.w(TAG, "Existing bind found. Return a spell checker session now. " 567 + "Listeners count = " + bindGroup.mListeners.size()); 568 } 569 try { 570 final ISpellCheckerSession session = 571 bindGroup.mSpellChecker.getISpellCheckerSession( 572 recipient.mScLocale, recipient.mScListener, bundle); 573 if (session != null) { 574 tsListener.onServiceConnected(session); 575 return; 576 } else { 577 if (DBG) { 578 Slog.w(TAG, "Existing bind already expired. "); 579 } 580 bindGroup.removeAll(); 581 } 582 } catch (RemoteException e) { 583 Slog.e(TAG, "Exception in getting spell checker session: " + e); 584 bindGroup.removeAll(); 585 } 586 } 587 } 588 } 589 final long ident = Binder.clearCallingIdentity(); 590 try { 591 startSpellCheckerServiceInnerLocked( 592 sci, locale, tsListener, scListener, uid, bundle); 593 } finally { 594 Binder.restoreCallingIdentity(ident); 595 } 596 } 597 return; 598 } 599 600 @Override 601 public boolean isSpellCheckerEnabled() { 602 if (!calledFromValidUser()) { 603 return false; 604 } 605 synchronized(mSpellCheckerMap) { 606 return isSpellCheckerEnabledLocked(); 607 } 608 } 609 610 private void startSpellCheckerServiceInnerLocked(SpellCheckerInfo info, String locale, 611 ITextServicesSessionListener tsListener, ISpellCheckerSessionListener scListener, 612 int uid, Bundle bundle) { 613 if (DBG) { 614 Slog.w(TAG, "Start spell checker session inner locked."); 615 } 616 final String sciId = info.getId(); 617 final InternalServiceConnection connection = new InternalServiceConnection( 618 sciId, locale, bundle); 619 final Intent serviceIntent = new Intent(SpellCheckerService.SERVICE_INTERFACE); 620 serviceIntent.setComponent(info.getComponent()); 621 if (DBG) { 622 Slog.w(TAG, "bind service: " + info.getId()); 623 } 624 if (!bindCurrentSpellCheckerService(serviceIntent, connection, 625 Context.BIND_AUTO_CREATE | Context.BIND_FOREGROUND_SERVICE_WHILE_AWAKE)) { 626 Slog.e(TAG, "Failed to get a spell checker service."); 627 return; 628 } 629 final SpellCheckerBindGroup group = new SpellCheckerBindGroup( 630 connection, tsListener, locale, scListener, uid, bundle); 631 mSpellCheckerBindGroups.put(sciId, group); 632 } 633 634 @Override 635 public SpellCheckerInfo[] getEnabledSpellCheckers() { 636 // TODO: Make this work even for non-current users? 637 if (!calledFromValidUser()) { 638 return null; 639 } 640 if (DBG) { 641 Slog.d(TAG, "getEnabledSpellCheckers: " + mSpellCheckerList.size()); 642 for (int i = 0; i < mSpellCheckerList.size(); ++i) { 643 Slog.d(TAG, "EnabledSpellCheckers: " + mSpellCheckerList.get(i).getPackageName()); 644 } 645 } 646 return mSpellCheckerList.toArray(new SpellCheckerInfo[mSpellCheckerList.size()]); 647 } 648 649 @Override 650 public void finishSpellCheckerService(ISpellCheckerSessionListener listener) { 651 if (!calledFromValidUser()) { 652 return; 653 } 654 if (DBG) { 655 Slog.d(TAG, "FinishSpellCheckerService"); 656 } 657 synchronized(mSpellCheckerMap) { 658 final ArrayList<SpellCheckerBindGroup> removeList = new ArrayList<>(); 659 for (SpellCheckerBindGroup group : mSpellCheckerBindGroups.values()) { 660 if (group == null) continue; 661 // Use removeList to avoid modifying mSpellCheckerBindGroups in this loop. 662 removeList.add(group); 663 } 664 final int removeSize = removeList.size(); 665 for (int i = 0; i < removeSize; ++i) { 666 removeList.get(i).removeListener(listener); 667 } 668 } 669 } 670 671 @Override 672 public void setCurrentSpellChecker(String locale, String sciId) { 673 if (!calledFromValidUser()) { 674 return; 675 } 676 synchronized(mSpellCheckerMap) { 677 if (mContext.checkCallingOrSelfPermission( 678 android.Manifest.permission.WRITE_SECURE_SETTINGS) 679 != PackageManager.PERMISSION_GRANTED) { 680 throw new SecurityException( 681 "Requires permission " 682 + android.Manifest.permission.WRITE_SECURE_SETTINGS); 683 } 684 setCurrentSpellCheckerLocked(sciId); 685 } 686 } 687 688 @Override 689 public void setCurrentSpellCheckerSubtype(String locale, int hashCode) { 690 if (!calledFromValidUser()) { 691 return; 692 } 693 synchronized(mSpellCheckerMap) { 694 if (mContext.checkCallingOrSelfPermission( 695 android.Manifest.permission.WRITE_SECURE_SETTINGS) 696 != PackageManager.PERMISSION_GRANTED) { 697 throw new SecurityException( 698 "Requires permission " 699 + android.Manifest.permission.WRITE_SECURE_SETTINGS); 700 } 701 setCurrentSpellCheckerSubtypeLocked(hashCode); 702 } 703 } 704 705 @Override 706 public void setSpellCheckerEnabled(boolean enabled) { 707 if (!calledFromValidUser()) { 708 return; 709 } 710 synchronized(mSpellCheckerMap) { 711 if (mContext.checkCallingOrSelfPermission( 712 android.Manifest.permission.WRITE_SECURE_SETTINGS) 713 != PackageManager.PERMISSION_GRANTED) { 714 throw new SecurityException( 715 "Requires permission " 716 + android.Manifest.permission.WRITE_SECURE_SETTINGS); 717 } 718 setSpellCheckerEnabledLocked(enabled); 719 } 720 } 721 722 private void setCurrentSpellCheckerLocked(String sciId) { 723 if (DBG) { 724 Slog.w(TAG, "setCurrentSpellChecker: " + sciId); 725 } 726 if (TextUtils.isEmpty(sciId) || !mSpellCheckerMap.containsKey(sciId)) return; 727 final SpellCheckerInfo currentSci = getCurrentSpellChecker(null); 728 if (currentSci != null && currentSci.getId().equals(sciId)) { 729 // Do nothing if the current spell checker is same as new spell checker. 730 return; 731 } 732 final long ident = Binder.clearCallingIdentity(); 733 try { 734 mSettings.putSelectedSpellChecker(sciId); 735 setCurrentSpellCheckerSubtypeLocked(0); 736 } finally { 737 Binder.restoreCallingIdentity(ident); 738 } 739 } 740 741 private void setCurrentSpellCheckerSubtypeLocked(int hashCode) { 742 if (DBG) { 743 Slog.w(TAG, "setCurrentSpellCheckerSubtype: " + hashCode); 744 } 745 final SpellCheckerInfo sci = getCurrentSpellChecker(null); 746 int tempHashCode = 0; 747 for (int i = 0; sci != null && i < sci.getSubtypeCount(); ++i) { 748 if(sci.getSubtypeAt(i).hashCode() == hashCode) { 749 tempHashCode = hashCode; 750 break; 751 } 752 } 753 final long ident = Binder.clearCallingIdentity(); 754 try { 755 mSettings.putSelectedSpellCheckerSubtype(tempHashCode); 756 } finally { 757 Binder.restoreCallingIdentity(ident); 758 } 759 } 760 761 private void setSpellCheckerEnabledLocked(boolean enabled) { 762 if (DBG) { 763 Slog.w(TAG, "setSpellCheckerEnabled: " + enabled); 764 } 765 final long ident = Binder.clearCallingIdentity(); 766 try { 767 mSettings.setSpellCheckerEnabled(enabled); 768 } finally { 769 Binder.restoreCallingIdentity(ident); 770 } 771 } 772 773 private boolean isSpellCheckerEnabledLocked() { 774 final long ident = Binder.clearCallingIdentity(); 775 try { 776 final boolean retval = mSettings.isSpellCheckerEnabled(); 777 if (DBG) { 778 Slog.w(TAG, "getSpellCheckerEnabled: " + retval); 779 } 780 return retval; 781 } finally { 782 Binder.restoreCallingIdentity(ident); 783 } 784 } 785 786 @Override 787 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 788 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 789 != PackageManager.PERMISSION_GRANTED) { 790 791 pw.println("Permission Denial: can't dump TextServicesManagerService from from pid=" 792 + Binder.getCallingPid() 793 + ", uid=" + Binder.getCallingUid()); 794 return; 795 } 796 797 synchronized(mSpellCheckerMap) { 798 pw.println("Current Text Services Manager state:"); 799 pw.println(" Spell Checkers:"); 800 int spellCheckerIndex = 0; 801 for (final SpellCheckerInfo info : mSpellCheckerMap.values()) { 802 pw.println(" Spell Checker #" + spellCheckerIndex); 803 info.dump(pw, " "); 804 ++spellCheckerIndex; 805 } 806 pw.println(""); 807 pw.println(" Spell Checker Bind Groups:"); 808 for (final Map.Entry<String, SpellCheckerBindGroup> ent 809 : mSpellCheckerBindGroups.entrySet()) { 810 final SpellCheckerBindGroup grp = ent.getValue(); 811 pw.println(" " + ent.getKey() + " " + grp + ":"); 812 pw.println(" " + "mInternalConnection=" + grp.mInternalConnection); 813 pw.println(" " + "mSpellChecker=" + grp.mSpellChecker); 814 pw.println(" " + "mBound=" + grp.mBound + " mConnected=" + grp.mConnected); 815 final int N = grp.mListeners.size(); 816 for (int i = 0; i < N; i++) { 817 final InternalDeathRecipient listener = grp.mListeners.get(i); 818 pw.println(" " + "Listener #" + i + ":"); 819 pw.println(" " + "mTsListener=" + listener.mTsListener); 820 pw.println(" " + "mScListener=" + listener.mScListener); 821 pw.println(" " + "mGroup=" + listener.mGroup); 822 pw.println(" " + "mScLocale=" + listener.mScLocale 823 + " mUid=" + listener.mUid); 824 } 825 } 826 pw.println(""); 827 pw.println(" mSettings:"); 828 mSettings.dumpLocked(pw, " "); 829 } 830 } 831 832 // SpellCheckerBindGroup contains active text service session listeners. 833 // If there are no listeners anymore, the SpellCheckerBindGroup instance will be removed from 834 // mSpellCheckerBindGroups 835 private class SpellCheckerBindGroup { 836 private final String TAG = SpellCheckerBindGroup.class.getSimpleName(); 837 private final InternalServiceConnection mInternalConnection; 838 private final CopyOnWriteArrayList<InternalDeathRecipient> mListeners = 839 new CopyOnWriteArrayList<>(); 840 public boolean mBound; 841 public ISpellCheckerService mSpellChecker; 842 public boolean mConnected; 843 844 public SpellCheckerBindGroup(InternalServiceConnection connection, 845 ITextServicesSessionListener listener, String locale, 846 ISpellCheckerSessionListener scListener, int uid, Bundle bundle) { 847 mInternalConnection = connection; 848 mBound = true; 849 mConnected = false; 850 addListener(listener, locale, scListener, uid, bundle); 851 } 852 853 public void onServiceConnected(ISpellCheckerService spellChecker) { 854 if (DBG) { 855 Slog.d(TAG, "onServiceConnected"); 856 } 857 858 for (InternalDeathRecipient listener : mListeners) { 859 try { 860 final ISpellCheckerSession session = spellChecker.getISpellCheckerSession( 861 listener.mScLocale, listener.mScListener, listener.mBundle); 862 synchronized(mSpellCheckerMap) { 863 if (mListeners.contains(listener)) { 864 listener.mTsListener.onServiceConnected(session); 865 } 866 } 867 } catch (RemoteException e) { 868 Slog.e(TAG, "Exception in getting the spell checker session." 869 + "Reconnect to the spellchecker. ", e); 870 removeAll(); 871 return; 872 } 873 } 874 synchronized(mSpellCheckerMap) { 875 mSpellChecker = spellChecker; 876 mConnected = true; 877 } 878 } 879 880 public InternalDeathRecipient addListener(ITextServicesSessionListener tsListener, 881 String locale, ISpellCheckerSessionListener scListener, int uid, Bundle bundle) { 882 if (DBG) { 883 Slog.d(TAG, "addListener: " + locale); 884 } 885 InternalDeathRecipient recipient = null; 886 synchronized(mSpellCheckerMap) { 887 try { 888 final int size = mListeners.size(); 889 for (int i = 0; i < size; ++i) { 890 if (mListeners.get(i).hasSpellCheckerListener(scListener)) { 891 // do not add the lister if the group already contains this. 892 return null; 893 } 894 } 895 recipient = new InternalDeathRecipient( 896 this, tsListener, locale, scListener, uid, bundle); 897 scListener.asBinder().linkToDeath(recipient, 0); 898 mListeners.add(recipient); 899 } catch(RemoteException e) { 900 // do nothing 901 } 902 cleanLocked(); 903 } 904 return recipient; 905 } 906 907 public void removeListener(ISpellCheckerSessionListener listener) { 908 if (DBG) { 909 Slog.w(TAG, "remove listener: " + listener.hashCode()); 910 } 911 synchronized(mSpellCheckerMap) { 912 final int size = mListeners.size(); 913 final ArrayList<InternalDeathRecipient> removeList = new ArrayList<>(); 914 for (int i = 0; i < size; ++i) { 915 final InternalDeathRecipient tempRecipient = mListeners.get(i); 916 if(tempRecipient.hasSpellCheckerListener(listener)) { 917 if (DBG) { 918 Slog.w(TAG, "found existing listener."); 919 } 920 removeList.add(tempRecipient); 921 } 922 } 923 final int removeSize = removeList.size(); 924 for (int i = 0; i < removeSize; ++i) { 925 if (DBG) { 926 Slog.w(TAG, "Remove " + removeList.get(i)); 927 } 928 final InternalDeathRecipient idr = removeList.get(i); 929 idr.mScListener.asBinder().unlinkToDeath(idr, 0); 930 mListeners.remove(idr); 931 } 932 cleanLocked(); 933 } 934 } 935 936 // cleanLocked may remove elements from mSpellCheckerBindGroups 937 private void cleanLocked() { 938 if (DBG) { 939 Slog.d(TAG, "cleanLocked"); 940 } 941 // If there are no more active listeners, clean up. Only do this 942 // once. 943 if (mBound && mListeners.isEmpty()) { 944 mBound = false; 945 final String sciId = mInternalConnection.mSciId; 946 SpellCheckerBindGroup cur = mSpellCheckerBindGroups.get(sciId); 947 if (cur == this) { 948 if (DBG) { 949 Slog.d(TAG, "Remove bind group."); 950 } 951 mSpellCheckerBindGroups.remove(sciId); 952 } 953 mContext.unbindService(mInternalConnection); 954 } 955 } 956 957 public void removeAll() { 958 Slog.e(TAG, "Remove the spell checker bind unexpectedly."); 959 synchronized(mSpellCheckerMap) { 960 final int size = mListeners.size(); 961 for (int i = 0; i < size; ++i) { 962 final InternalDeathRecipient idr = mListeners.get(i); 963 idr.mScListener.asBinder().unlinkToDeath(idr, 0); 964 } 965 mListeners.clear(); 966 cleanLocked(); 967 } 968 } 969 } 970 971 private class InternalServiceConnection implements ServiceConnection { 972 private final String mSciId; 973 private final String mLocale; 974 private final Bundle mBundle; 975 public InternalServiceConnection( 976 String id, String locale, Bundle bundle) { 977 mSciId = id; 978 mLocale = locale; 979 mBundle = bundle; 980 } 981 982 @Override 983 public void onServiceConnected(ComponentName name, IBinder service) { 984 synchronized(mSpellCheckerMap) { 985 onServiceConnectedInnerLocked(name, service); 986 } 987 } 988 989 private void onServiceConnectedInnerLocked(ComponentName name, IBinder service) { 990 if (DBG) { 991 Slog.w(TAG, "onServiceConnected: " + name); 992 } 993 final ISpellCheckerService spellChecker = 994 ISpellCheckerService.Stub.asInterface(service); 995 final SpellCheckerBindGroup group = mSpellCheckerBindGroups.get(mSciId); 996 if (group != null && this == group.mInternalConnection) { 997 group.onServiceConnected(spellChecker); 998 } 999 } 1000 1001 @Override 1002 public void onServiceDisconnected(ComponentName name) { 1003 synchronized(mSpellCheckerMap) { 1004 final SpellCheckerBindGroup group = mSpellCheckerBindGroups.get(mSciId); 1005 if (group != null && this == group.mInternalConnection) { 1006 mSpellCheckerBindGroups.remove(mSciId); 1007 } 1008 } 1009 } 1010 } 1011 1012 private class InternalDeathRecipient implements IBinder.DeathRecipient { 1013 public final ITextServicesSessionListener mTsListener; 1014 public final ISpellCheckerSessionListener mScListener; 1015 public final String mScLocale; 1016 private final SpellCheckerBindGroup mGroup; 1017 public final int mUid; 1018 public final Bundle mBundle; 1019 public InternalDeathRecipient(SpellCheckerBindGroup group, 1020 ITextServicesSessionListener tsListener, String scLocale, 1021 ISpellCheckerSessionListener scListener, int uid, Bundle bundle) { 1022 mTsListener = tsListener; 1023 mScListener = scListener; 1024 mScLocale = scLocale; 1025 mGroup = group; 1026 mUid = uid; 1027 mBundle = bundle; 1028 } 1029 1030 public boolean hasSpellCheckerListener(ISpellCheckerSessionListener listener) { 1031 return listener.asBinder().equals(mScListener.asBinder()); 1032 } 1033 1034 @Override 1035 public void binderDied() { 1036 mGroup.removeListener(mScListener); 1037 } 1038 } 1039 1040 private static class TextServicesSettings { 1041 private final ContentResolver mResolver; 1042 @UserIdInt 1043 private int mCurrentUserId; 1044 @GuardedBy("mLock") 1045 private int[] mCurrentProfileIds = new int[0]; 1046 private Object mLock = new Object(); 1047 1048 /** 1049 * On-memory data store to emulate when {@link #mCopyOnWrite} is {@code true}. 1050 */ 1051 private final HashMap<String, String> mCopyOnWriteDataStore = new HashMap<>(); 1052 private boolean mCopyOnWrite = false; 1053 1054 public TextServicesSettings(ContentResolver resolver, @UserIdInt int userId, 1055 boolean copyOnWrite) { 1056 mResolver = resolver; 1057 switchCurrentUser(userId, copyOnWrite); 1058 } 1059 1060 /** 1061 * Must be called when the current user is changed. 1062 * 1063 * @param userId The user ID. 1064 * @param copyOnWrite If {@code true}, for each settings key 1065 * (e.g. {@link Settings.Secure#SELECTED_SPELL_CHECKER}) we use the actual settings on the 1066 * {@link Settings.Secure} until we do the first write operation. 1067 */ 1068 public void switchCurrentUser(@UserIdInt int userId, boolean copyOnWrite) { 1069 if (DBG) { 1070 Slog.d(TAG, "--- Swtich the current user from " + mCurrentUserId + " to " 1071 + userId + ", new ime = " + getSelectedSpellChecker()); 1072 } 1073 if (mCurrentUserId != userId || mCopyOnWrite != copyOnWrite) { 1074 mCopyOnWriteDataStore.clear(); 1075 // TODO: mCurrentProfileIds should be cleared here. 1076 } 1077 // TSMS settings are kept per user, so keep track of current user 1078 mCurrentUserId = userId; 1079 mCopyOnWrite = copyOnWrite; 1080 // TODO: mCurrentProfileIds should be updated here. 1081 } 1082 1083 private void putString(final String key, final String str) { 1084 if (mCopyOnWrite) { 1085 mCopyOnWriteDataStore.put(key, str); 1086 } else { 1087 Settings.Secure.putStringForUser(mResolver, key, str, mCurrentUserId); 1088 } 1089 } 1090 1091 @Nullable 1092 private String getString(@NonNull final String key, @Nullable final String defaultValue) { 1093 final String result; 1094 if (mCopyOnWrite && mCopyOnWriteDataStore.containsKey(key)) { 1095 result = mCopyOnWriteDataStore.get(key); 1096 } else { 1097 result = Settings.Secure.getStringForUser(mResolver, key, mCurrentUserId); 1098 } 1099 return result != null ? result : defaultValue; 1100 } 1101 1102 private void putInt(final String key, final int value) { 1103 if (mCopyOnWrite) { 1104 mCopyOnWriteDataStore.put(key, String.valueOf(value)); 1105 } else { 1106 Settings.Secure.putIntForUser(mResolver, key, value, mCurrentUserId); 1107 } 1108 } 1109 1110 private int getInt(final String key, final int defaultValue) { 1111 if (mCopyOnWrite && mCopyOnWriteDataStore.containsKey(key)) { 1112 final String result = mCopyOnWriteDataStore.get(key); 1113 return result != null ? Integer.parseInt(result) : 0; 1114 } 1115 return Settings.Secure.getIntForUser(mResolver, key, defaultValue, mCurrentUserId); 1116 } 1117 1118 private void putBoolean(final String key, final boolean value) { 1119 putInt(key, value ? 1 : 0); 1120 } 1121 1122 private boolean getBoolean(final String key, final boolean defaultValue) { 1123 return getInt(key, defaultValue ? 1 : 0) == 1; 1124 } 1125 1126 public void setCurrentProfileIds(int[] currentProfileIds) { 1127 synchronized (mLock) { 1128 mCurrentProfileIds = currentProfileIds; 1129 } 1130 } 1131 1132 public boolean isCurrentProfile(@UserIdInt int userId) { 1133 synchronized (mLock) { 1134 if (userId == mCurrentUserId) return true; 1135 for (int i = 0; i < mCurrentProfileIds.length; i++) { 1136 if (userId == mCurrentProfileIds[i]) return true; 1137 } 1138 return false; 1139 } 1140 } 1141 1142 @UserIdInt 1143 public int getCurrentUserId() { 1144 return mCurrentUserId; 1145 } 1146 1147 public void putSelectedSpellChecker(@Nullable String sciId) { 1148 if (TextUtils.isEmpty(sciId)) { 1149 // OK to coalesce to null, since getSelectedSpellChecker() can take care of the 1150 // empty data scenario. 1151 putString(Settings.Secure.SELECTED_SPELL_CHECKER, null); 1152 } else { 1153 putString(Settings.Secure.SELECTED_SPELL_CHECKER, sciId); 1154 } 1155 } 1156 1157 public void putSelectedSpellCheckerSubtype(int hashCode) { 1158 putInt(Settings.Secure.SELECTED_SPELL_CHECKER_SUBTYPE, hashCode); 1159 } 1160 1161 public void setSpellCheckerEnabled(boolean enabled) { 1162 putBoolean(Settings.Secure.SPELL_CHECKER_ENABLED, enabled); 1163 } 1164 1165 @NonNull 1166 public String getSelectedSpellChecker() { 1167 return getString(Settings.Secure.SELECTED_SPELL_CHECKER, ""); 1168 } 1169 1170 public int getSelectedSpellCheckerSubtype(final int defaultValue) { 1171 return getInt(Settings.Secure.SELECTED_SPELL_CHECKER_SUBTYPE, defaultValue); 1172 } 1173 1174 public boolean isSpellCheckerEnabled() { 1175 return getBoolean(Settings.Secure.SPELL_CHECKER_ENABLED, true); 1176 } 1177 1178 public void dumpLocked(final PrintWriter pw, final String prefix) { 1179 pw.println(prefix + "mCurrentUserId=" + mCurrentUserId); 1180 pw.println(prefix + "mCurrentProfileIds=" + Arrays.toString(mCurrentProfileIds)); 1181 pw.println(prefix + "mCopyOnWrite=" + mCopyOnWrite); 1182 } 1183 } 1184 1185 // ---------------------------------------------------------------------- 1186 // Utilities for debug 1187 private static String getStackTrace() { 1188 final StringBuilder sb = new StringBuilder(); 1189 try { 1190 throw new RuntimeException(); 1191 } catch (RuntimeException e) { 1192 final StackTraceElement[] frames = e.getStackTrace(); 1193 // Start at 1 because the first frame is here and we don't care about it 1194 for (int j = 1; j < frames.length; ++j) { 1195 sb.append(frames[j].toString() + "\n"); 1196 } 1197 } 1198 return sb.toString(); 1199 } 1200 } 1201
