1/* 2 * Copyright (C) 2008 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; 18 19import static android.os.ParcelFileDescriptor.*; 20 21import android.app.ActivityManagerNative; 22import android.app.AppGlobals; 23import android.app.IUserSwitchObserver; 24import android.app.IWallpaperManager; 25import android.app.IWallpaperManagerCallback; 26import android.app.PendingIntent; 27import android.app.WallpaperInfo; 28import android.app.backup.BackupManager; 29import android.app.backup.WallpaperBackupHelper; 30import android.content.BroadcastReceiver; 31import android.content.ComponentName; 32import android.content.Context; 33import android.content.Intent; 34import android.content.IntentFilter; 35import android.content.ServiceConnection; 36import android.content.pm.IPackageManager; 37import android.content.pm.PackageManager; 38import android.content.pm.ResolveInfo; 39import android.content.pm.ServiceInfo; 40import android.content.pm.PackageManager.NameNotFoundException; 41import android.content.pm.UserInfo; 42import android.content.res.Resources; 43import android.os.Binder; 44import android.os.Bundle; 45import android.os.Environment; 46import android.os.FileUtils; 47import android.os.IBinder; 48import android.os.IRemoteCallback; 49import android.os.RemoteException; 50import android.os.FileObserver; 51import android.os.ParcelFileDescriptor; 52import android.os.RemoteCallbackList; 53import android.os.SELinux; 54import android.os.ServiceManager; 55import android.os.SystemClock; 56import android.os.UserHandle; 57import android.os.UserManager; 58import android.service.wallpaper.IWallpaperConnection; 59import android.service.wallpaper.IWallpaperEngine; 60import android.service.wallpaper.IWallpaperService; 61import android.service.wallpaper.WallpaperService; 62import android.util.Slog; 63import android.util.SparseArray; 64import android.util.Xml; 65import android.view.Display; 66import android.view.IWindowManager; 67import android.view.WindowManager; 68 69import java.io.FileDescriptor; 70import java.io.IOException; 71import java.io.InputStream; 72import java.io.File; 73import java.io.FileNotFoundException; 74import java.io.FileInputStream; 75import java.io.FileOutputStream; 76import java.io.PrintWriter; 77import java.util.List; 78 79import org.xmlpull.v1.XmlPullParser; 80import org.xmlpull.v1.XmlPullParserException; 81import org.xmlpull.v1.XmlSerializer; 82 83import com.android.internal.content.PackageMonitor; 84import com.android.internal.util.FastXmlSerializer; 85import com.android.internal.util.JournaledFile; 86 87class WallpaperManagerService extends IWallpaperManager.Stub { 88 static final String TAG = "WallpaperService"; 89 static final boolean DEBUG = false; 90 91 final Object mLock = new Object[0]; 92 93 /** 94 * Minimum time between crashes of a wallpaper service for us to consider 95 * restarting it vs. just reverting to the static wallpaper. 96 */ 97 static final long MIN_WALLPAPER_CRASH_TIME = 10000; 98 static final String WALLPAPER = "wallpaper"; 99 static final String WALLPAPER_INFO = "wallpaper_info.xml"; 100 101 /** 102 * Name of the component used to display bitmap wallpapers from either the gallery or 103 * built-in wallpapers. 104 */ 105 static final ComponentName IMAGE_WALLPAPER = new ComponentName("com.android.systemui", 106 "com.android.systemui.ImageWallpaper"); 107 108 /** 109 * Observes the wallpaper for changes and notifies all IWallpaperServiceCallbacks 110 * that the wallpaper has changed. The CREATE is triggered when there is no 111 * wallpaper set and is created for the first time. The CLOSE_WRITE is triggered 112 * everytime the wallpaper is changed. 113 */ 114 private class WallpaperObserver extends FileObserver { 115 116 final WallpaperData mWallpaper; 117 final File mWallpaperDir; 118 final File mWallpaperFile; 119 120 public WallpaperObserver(WallpaperData wallpaper) { 121 super(getWallpaperDir(wallpaper.userId).getAbsolutePath(), 122 CLOSE_WRITE | DELETE | DELETE_SELF); 123 mWallpaperDir = getWallpaperDir(wallpaper.userId); 124 mWallpaper = wallpaper; 125 mWallpaperFile = new File(mWallpaperDir, WALLPAPER); 126 } 127 128 @Override 129 public void onEvent(int event, String path) { 130 if (path == null) { 131 return; 132 } 133 synchronized (mLock) { 134 // changing the wallpaper means we'll need to back up the new one 135 long origId = Binder.clearCallingIdentity(); 136 BackupManager bm = new BackupManager(mContext); 137 bm.dataChanged(); 138 Binder.restoreCallingIdentity(origId); 139 140 File changedFile = new File(mWallpaperDir, path); 141 if (mWallpaperFile.equals(changedFile)) { 142 notifyCallbacksLocked(mWallpaper); 143 if (mWallpaper.wallpaperComponent == null || event != CLOSE_WRITE 144 || mWallpaper.imageWallpaperPending) { 145 if (event == CLOSE_WRITE) { 146 mWallpaper.imageWallpaperPending = false; 147 } 148 bindWallpaperComponentLocked(IMAGE_WALLPAPER, true, 149 false, mWallpaper, null); 150 saveSettingsLocked(mWallpaper); 151 } 152 } 153 } 154 } 155 } 156 157 final Context mContext; 158 final IWindowManager mIWindowManager; 159 final IPackageManager mIPackageManager; 160 final MyPackageMonitor mMonitor; 161 WallpaperData mLastWallpaper; 162 163 SparseArray<WallpaperData> mWallpaperMap = new SparseArray<WallpaperData>(); 164 165 int mCurrentUserId; 166 167 static class WallpaperData { 168 169 int userId; 170 171 File wallpaperFile; 172 173 /** 174 * Client is currently writing a new image wallpaper. 175 */ 176 boolean imageWallpaperPending; 177 178 /** 179 * Resource name if using a picture from the wallpaper gallery 180 */ 181 String name = ""; 182 183 /** 184 * The component name of the currently set live wallpaper. 185 */ 186 ComponentName wallpaperComponent; 187 188 /** 189 * The component name of the wallpaper that should be set next. 190 */ 191 ComponentName nextWallpaperComponent; 192 193 WallpaperConnection connection; 194 long lastDiedTime; 195 boolean wallpaperUpdating; 196 WallpaperObserver wallpaperObserver; 197 198 /** 199 * List of callbacks registered they should each be notified when the wallpaper is changed. 200 */ 201 private RemoteCallbackList<IWallpaperManagerCallback> callbacks 202 = new RemoteCallbackList<IWallpaperManagerCallback>(); 203 204 int width = -1; 205 int height = -1; 206 207 WallpaperData(int userId) { 208 this.userId = userId; 209 wallpaperFile = new File(getWallpaperDir(userId), WALLPAPER); 210 } 211 } 212 213 class WallpaperConnection extends IWallpaperConnection.Stub 214 implements ServiceConnection { 215 final WallpaperInfo mInfo; 216 final Binder mToken = new Binder(); 217 IWallpaperService mService; 218 IWallpaperEngine mEngine; 219 WallpaperData mWallpaper; 220 IRemoteCallback mReply; 221 222 public WallpaperConnection(WallpaperInfo info, WallpaperData wallpaper) { 223 mInfo = info; 224 mWallpaper = wallpaper; 225 } 226 227 @Override 228 public void onServiceConnected(ComponentName name, IBinder service) { 229 synchronized (mLock) { 230 if (mWallpaper.connection == this) { 231 mWallpaper.lastDiedTime = SystemClock.uptimeMillis(); 232 mService = IWallpaperService.Stub.asInterface(service); 233 attachServiceLocked(this, mWallpaper); 234 // XXX should probably do saveSettingsLocked() later 235 // when we have an engine, but I'm not sure about 236 // locking there and anyway we always need to be able to 237 // recover if there is something wrong. 238 saveSettingsLocked(mWallpaper); 239 } 240 } 241 } 242 243 @Override 244 public void onServiceDisconnected(ComponentName name) { 245 synchronized (mLock) { 246 mService = null; 247 mEngine = null; 248 if (mWallpaper.connection == this) { 249 Slog.w(TAG, "Wallpaper service gone: " + mWallpaper.wallpaperComponent); 250 if (!mWallpaper.wallpaperUpdating 251 && (mWallpaper.lastDiedTime + MIN_WALLPAPER_CRASH_TIME) 252 > SystemClock.uptimeMillis() 253 && mWallpaper.userId == mCurrentUserId) { 254 Slog.w(TAG, "Reverting to built-in wallpaper!"); 255 clearWallpaperLocked(true, mWallpaper.userId, null); 256 } 257 } 258 } 259 } 260 261 @Override 262 public void attachEngine(IWallpaperEngine engine) { 263 synchronized (mLock) { 264 mEngine = engine; 265 } 266 } 267 268 @Override 269 public void engineShown(IWallpaperEngine engine) { 270 synchronized (mLock) { 271 if (mReply != null) { 272 long ident = Binder.clearCallingIdentity(); 273 try { 274 mReply.sendResult(null); 275 } catch (RemoteException e) { 276 Binder.restoreCallingIdentity(ident); 277 } 278 mReply = null; 279 } 280 } 281 } 282 283 @Override 284 public ParcelFileDescriptor setWallpaper(String name) { 285 synchronized (mLock) { 286 if (mWallpaper.connection == this) { 287 return updateWallpaperBitmapLocked(name, mWallpaper); 288 } 289 return null; 290 } 291 } 292 } 293 294 class MyPackageMonitor extends PackageMonitor { 295 @Override 296 public void onPackageUpdateFinished(String packageName, int uid) { 297 synchronized (mLock) { 298 if (mCurrentUserId != getChangingUserId()) { 299 return; 300 } 301 WallpaperData wallpaper = mWallpaperMap.get(mCurrentUserId); 302 if (wallpaper != null) { 303 if (wallpaper.wallpaperComponent != null 304 && wallpaper.wallpaperComponent.getPackageName().equals(packageName)) { 305 wallpaper.wallpaperUpdating = false; 306 ComponentName comp = wallpaper.wallpaperComponent; 307 clearWallpaperComponentLocked(wallpaper); 308 if (!bindWallpaperComponentLocked(comp, false, false, 309 wallpaper, null)) { 310 Slog.w(TAG, "Wallpaper no longer available; reverting to default"); 311 clearWallpaperLocked(false, wallpaper.userId, null); 312 } 313 } 314 } 315 } 316 } 317 318 @Override 319 public void onPackageModified(String packageName) { 320 synchronized (mLock) { 321 if (mCurrentUserId != getChangingUserId()) { 322 return; 323 } 324 WallpaperData wallpaper = mWallpaperMap.get(mCurrentUserId); 325 if (wallpaper != null) { 326 if (wallpaper.wallpaperComponent == null 327 || !wallpaper.wallpaperComponent.getPackageName().equals(packageName)) { 328 return; 329 } 330 doPackagesChangedLocked(true, wallpaper); 331 } 332 } 333 } 334 335 @Override 336 public void onPackageUpdateStarted(String packageName, int uid) { 337 synchronized (mLock) { 338 if (mCurrentUserId != getChangingUserId()) { 339 return; 340 } 341 WallpaperData wallpaper = mWallpaperMap.get(mCurrentUserId); 342 if (wallpaper != null) { 343 if (wallpaper.wallpaperComponent != null 344 && wallpaper.wallpaperComponent.getPackageName().equals(packageName)) { 345 wallpaper.wallpaperUpdating = true; 346 } 347 } 348 } 349 } 350 351 @Override 352 public boolean onHandleForceStop(Intent intent, String[] packages, int uid, boolean doit) { 353 synchronized (mLock) { 354 boolean changed = false; 355 if (mCurrentUserId != getChangingUserId()) { 356 return false; 357 } 358 WallpaperData wallpaper = mWallpaperMap.get(mCurrentUserId); 359 if (wallpaper != null) { 360 boolean res = doPackagesChangedLocked(doit, wallpaper); 361 changed |= res; 362 } 363 return changed; 364 } 365 } 366 367 @Override 368 public void onSomePackagesChanged() { 369 synchronized (mLock) { 370 if (mCurrentUserId != getChangingUserId()) { 371 return; 372 } 373 WallpaperData wallpaper = mWallpaperMap.get(mCurrentUserId); 374 if (wallpaper != null) { 375 doPackagesChangedLocked(true, wallpaper); 376 } 377 } 378 } 379 380 boolean doPackagesChangedLocked(boolean doit, WallpaperData wallpaper) { 381 boolean changed = false; 382 if (wallpaper.wallpaperComponent != null) { 383 int change = isPackageDisappearing(wallpaper.wallpaperComponent 384 .getPackageName()); 385 if (change == PACKAGE_PERMANENT_CHANGE 386 || change == PACKAGE_TEMPORARY_CHANGE) { 387 changed = true; 388 if (doit) { 389 Slog.w(TAG, "Wallpaper uninstalled, removing: " 390 + wallpaper.wallpaperComponent); 391 clearWallpaperLocked(false, wallpaper.userId, null); 392 } 393 } 394 } 395 if (wallpaper.nextWallpaperComponent != null) { 396 int change = isPackageDisappearing(wallpaper.nextWallpaperComponent 397 .getPackageName()); 398 if (change == PACKAGE_PERMANENT_CHANGE 399 || change == PACKAGE_TEMPORARY_CHANGE) { 400 wallpaper.nextWallpaperComponent = null; 401 } 402 } 403 if (wallpaper.wallpaperComponent != null 404 && isPackageModified(wallpaper.wallpaperComponent.getPackageName())) { 405 try { 406 mContext.getPackageManager().getServiceInfo( 407 wallpaper.wallpaperComponent, 0); 408 } catch (NameNotFoundException e) { 409 Slog.w(TAG, "Wallpaper component gone, removing: " 410 + wallpaper.wallpaperComponent); 411 clearWallpaperLocked(false, wallpaper.userId, null); 412 } 413 } 414 if (wallpaper.nextWallpaperComponent != null 415 && isPackageModified(wallpaper.nextWallpaperComponent.getPackageName())) { 416 try { 417 mContext.getPackageManager().getServiceInfo( 418 wallpaper.nextWallpaperComponent, 0); 419 } catch (NameNotFoundException e) { 420 wallpaper.nextWallpaperComponent = null; 421 } 422 } 423 return changed; 424 } 425 } 426 427 public WallpaperManagerService(Context context) { 428 if (DEBUG) Slog.v(TAG, "WallpaperService startup"); 429 mContext = context; 430 mIWindowManager = IWindowManager.Stub.asInterface( 431 ServiceManager.getService(Context.WINDOW_SERVICE)); 432 mIPackageManager = AppGlobals.getPackageManager(); 433 mMonitor = new MyPackageMonitor(); 434 mMonitor.register(context, null, UserHandle.ALL, true); 435 getWallpaperDir(UserHandle.USER_OWNER).mkdirs(); 436 loadSettingsLocked(UserHandle.USER_OWNER); 437 } 438 439 private static File getWallpaperDir(int userId) { 440 return Environment.getUserSystemDirectory(userId); 441 } 442 443 @Override 444 protected void finalize() throws Throwable { 445 super.finalize(); 446 for (int i = 0; i < mWallpaperMap.size(); i++) { 447 WallpaperData wallpaper = mWallpaperMap.valueAt(i); 448 wallpaper.wallpaperObserver.stopWatching(); 449 } 450 } 451 452 public void systemReady() { 453 if (DEBUG) Slog.v(TAG, "systemReady"); 454 WallpaperData wallpaper = mWallpaperMap.get(UserHandle.USER_OWNER); 455 switchWallpaper(wallpaper, null); 456 wallpaper.wallpaperObserver = new WallpaperObserver(wallpaper); 457 wallpaper.wallpaperObserver.startWatching(); 458 459 IntentFilter userFilter = new IntentFilter(); 460 userFilter.addAction(Intent.ACTION_USER_REMOVED); 461 userFilter.addAction(Intent.ACTION_USER_STOPPING); 462 mContext.registerReceiver(new BroadcastReceiver() { 463 @Override 464 public void onReceive(Context context, Intent intent) { 465 String action = intent.getAction(); 466 if (Intent.ACTION_USER_REMOVED.equals(action)) { 467 onRemoveUser(intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 468 UserHandle.USER_NULL)); 469 } 470 // TODO: Race condition causing problems when cleaning up on stopping a user. 471 // Comment this out for now. 472 // else if (Intent.ACTION_USER_STOPPING.equals(action)) { 473 // onStoppingUser(intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 474 // UserHandle.USER_NULL)); 475 // } 476 } 477 }, userFilter); 478 479 try { 480 ActivityManagerNative.getDefault().registerUserSwitchObserver( 481 new IUserSwitchObserver.Stub() { 482 @Override 483 public void onUserSwitching(int newUserId, IRemoteCallback reply) { 484 switchUser(newUserId, reply); 485 } 486 487 @Override 488 public void onUserSwitchComplete(int newUserId) throws RemoteException { 489 } 490 }); 491 } catch (RemoteException e) { 492 // TODO Auto-generated catch block 493 e.printStackTrace(); 494 } 495 } 496 497 String getName() { 498 synchronized (mLock) { 499 return mWallpaperMap.get(0).name; 500 } 501 } 502 503 void onStoppingUser(int userId) { 504 if (userId < 1) return; 505 synchronized (mLock) { 506 WallpaperData wallpaper = mWallpaperMap.get(userId); 507 if (wallpaper != null) { 508 if (wallpaper.wallpaperObserver != null) { 509 wallpaper.wallpaperObserver.stopWatching(); 510 wallpaper.wallpaperObserver = null; 511 } 512 mWallpaperMap.remove(userId); 513 } 514 } 515 } 516 517 void onRemoveUser(int userId) { 518 if (userId < 1) return; 519 synchronized (mLock) { 520 onStoppingUser(userId); 521 File wallpaperFile = new File(getWallpaperDir(userId), WALLPAPER); 522 wallpaperFile.delete(); 523 File wallpaperInfoFile = new File(getWallpaperDir(userId), WALLPAPER_INFO); 524 wallpaperInfoFile.delete(); 525 } 526 } 527 528 void switchUser(int userId, IRemoteCallback reply) { 529 synchronized (mLock) { 530 mCurrentUserId = userId; 531 WallpaperData wallpaper = mWallpaperMap.get(userId); 532 if (wallpaper == null) { 533 wallpaper = new WallpaperData(userId); 534 mWallpaperMap.put(userId, wallpaper); 535 loadSettingsLocked(userId); 536 } 537 // Not started watching yet, in case wallpaper data was loaded for other reasons. 538 if (wallpaper.wallpaperObserver == null) { 539 wallpaper.wallpaperObserver = new WallpaperObserver(wallpaper); 540 wallpaper.wallpaperObserver.startWatching(); 541 } 542 switchWallpaper(wallpaper, reply); 543 } 544 } 545 546 void switchWallpaper(WallpaperData wallpaper, IRemoteCallback reply) { 547 synchronized (mLock) { 548 RuntimeException e = null; 549 try { 550 ComponentName cname = wallpaper.wallpaperComponent != null ? 551 wallpaper.wallpaperComponent : wallpaper.nextWallpaperComponent; 552 if (bindWallpaperComponentLocked(cname, true, false, wallpaper, reply)) { 553 return; 554 } 555 } catch (RuntimeException e1) { 556 e = e1; 557 } 558 Slog.w(TAG, "Failure starting previous wallpaper", e); 559 clearWallpaperLocked(false, wallpaper.userId, reply); 560 } 561 } 562 563 public void clearWallpaper() { 564 if (DEBUG) Slog.v(TAG, "clearWallpaper"); 565 synchronized (mLock) { 566 clearWallpaperLocked(false, UserHandle.getCallingUserId(), null); 567 } 568 } 569 570 void clearWallpaperLocked(boolean defaultFailed, int userId, IRemoteCallback reply) { 571 WallpaperData wallpaper = mWallpaperMap.get(userId); 572 File f = new File(getWallpaperDir(userId), WALLPAPER); 573 if (f.exists()) { 574 f.delete(); 575 } 576 final long ident = Binder.clearCallingIdentity(); 577 RuntimeException e = null; 578 try { 579 wallpaper.imageWallpaperPending = false; 580 if (userId != mCurrentUserId) return; 581 if (bindWallpaperComponentLocked(defaultFailed 582 ? IMAGE_WALLPAPER 583 : null, true, false, wallpaper, reply)) { 584 return; 585 } 586 } catch (IllegalArgumentException e1) { 587 e = e1; 588 } finally { 589 Binder.restoreCallingIdentity(ident); 590 } 591 592 // This can happen if the default wallpaper component doesn't 593 // exist. This should be a system configuration problem, but 594 // let's not let it crash the system and just live with no 595 // wallpaper. 596 Slog.e(TAG, "Default wallpaper component not found!", e); 597 clearWallpaperComponentLocked(wallpaper); 598 if (reply != null) { 599 try { 600 reply.sendResult(null); 601 } catch (RemoteException e1) { 602 } 603 } 604 } 605 606 public boolean hasNamedWallpaper(String name) { 607 synchronized (mLock) { 608 List<UserInfo> users; 609 long ident = Binder.clearCallingIdentity(); 610 try { 611 users = ((UserManager) mContext.getSystemService(Context.USER_SERVICE)).getUsers(); 612 } finally { 613 Binder.restoreCallingIdentity(ident); 614 } 615 for (UserInfo user: users) { 616 WallpaperData wd = mWallpaperMap.get(user.id); 617 if (wd == null) { 618 // User hasn't started yet, so load her settings to peek at the wallpaper 619 loadSettingsLocked(user.id); 620 wd = mWallpaperMap.get(user.id); 621 } 622 if (wd != null && name.equals(wd.name)) { 623 return true; 624 } 625 } 626 } 627 return false; 628 } 629 630 public void setDimensionHints(int width, int height) throws RemoteException { 631 checkPermission(android.Manifest.permission.SET_WALLPAPER_HINTS); 632 synchronized (mLock) { 633 int userId = UserHandle.getCallingUserId(); 634 WallpaperData wallpaper = mWallpaperMap.get(userId); 635 if (wallpaper == null) { 636 throw new IllegalStateException("Wallpaper not yet initialized for user " + userId); 637 } 638 if (width <= 0 || height <= 0) { 639 throw new IllegalArgumentException("width and height must be > 0"); 640 } 641 642 if (width != wallpaper.width || height != wallpaper.height) { 643 wallpaper.width = width; 644 wallpaper.height = height; 645 saveSettingsLocked(wallpaper); 646 if (mCurrentUserId != userId) return; // Don't change the properties now 647 if (wallpaper.connection != null) { 648 if (wallpaper.connection.mEngine != null) { 649 try { 650 wallpaper.connection.mEngine.setDesiredSize( 651 width, height); 652 } catch (RemoteException e) { 653 } 654 notifyCallbacksLocked(wallpaper); 655 } 656 } 657 } 658 } 659 } 660 661 public int getWidthHint() throws RemoteException { 662 synchronized (mLock) { 663 WallpaperData wallpaper = mWallpaperMap.get(UserHandle.getCallingUserId()); 664 return wallpaper.width; 665 } 666 } 667 668 public int getHeightHint() throws RemoteException { 669 synchronized (mLock) { 670 WallpaperData wallpaper = mWallpaperMap.get(UserHandle.getCallingUserId()); 671 return wallpaper.height; 672 } 673 } 674 675 public ParcelFileDescriptor getWallpaper(IWallpaperManagerCallback cb, 676 Bundle outParams) { 677 synchronized (mLock) { 678 // This returns the current user's wallpaper, if called by a system service. Else it 679 // returns the wallpaper for the calling user. 680 int callingUid = Binder.getCallingUid(); 681 int wallpaperUserId = 0; 682 if (callingUid == android.os.Process.SYSTEM_UID) { 683 wallpaperUserId = mCurrentUserId; 684 } else { 685 wallpaperUserId = UserHandle.getUserId(callingUid); 686 } 687 WallpaperData wallpaper = mWallpaperMap.get(wallpaperUserId); 688 try { 689 if (outParams != null) { 690 outParams.putInt("width", wallpaper.width); 691 outParams.putInt("height", wallpaper.height); 692 } 693 wallpaper.callbacks.register(cb); 694 File f = new File(getWallpaperDir(wallpaperUserId), WALLPAPER); 695 if (!f.exists()) { 696 return null; 697 } 698 return ParcelFileDescriptor.open(f, MODE_READ_ONLY); 699 } catch (FileNotFoundException e) { 700 /* Shouldn't happen as we check to see if the file exists */ 701 Slog.w(TAG, "Error getting wallpaper", e); 702 } 703 return null; 704 } 705 } 706 707 public WallpaperInfo getWallpaperInfo() { 708 int userId = UserHandle.getCallingUserId(); 709 synchronized (mLock) { 710 WallpaperData wallpaper = mWallpaperMap.get(userId); 711 if (wallpaper.connection != null) { 712 return wallpaper.connection.mInfo; 713 } 714 return null; 715 } 716 } 717 718 public ParcelFileDescriptor setWallpaper(String name) { 719 checkPermission(android.Manifest.permission.SET_WALLPAPER); 720 synchronized (mLock) { 721 if (DEBUG) Slog.v(TAG, "setWallpaper"); 722 int userId = UserHandle.getCallingUserId(); 723 WallpaperData wallpaper = mWallpaperMap.get(userId); 724 if (wallpaper == null) { 725 throw new IllegalStateException("Wallpaper not yet initialized for user " + userId); 726 } 727 final long ident = Binder.clearCallingIdentity(); 728 try { 729 ParcelFileDescriptor pfd = updateWallpaperBitmapLocked(name, wallpaper); 730 if (pfd != null) { 731 wallpaper.imageWallpaperPending = true; 732 } 733 return pfd; 734 } finally { 735 Binder.restoreCallingIdentity(ident); 736 } 737 } 738 } 739 740 ParcelFileDescriptor updateWallpaperBitmapLocked(String name, WallpaperData wallpaper) { 741 if (name == null) name = ""; 742 try { 743 File dir = getWallpaperDir(wallpaper.userId); 744 if (!dir.exists()) { 745 dir.mkdir(); 746 FileUtils.setPermissions( 747 dir.getPath(), 748 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 749 -1, -1); 750 } 751 File file = new File(dir, WALLPAPER); 752 ParcelFileDescriptor fd = ParcelFileDescriptor.open(file, 753 MODE_CREATE|MODE_READ_WRITE); 754 if (!SELinux.restorecon(file)) { 755 return null; 756 } 757 wallpaper.name = name; 758 return fd; 759 } catch (FileNotFoundException e) { 760 Slog.w(TAG, "Error setting wallpaper", e); 761 } 762 return null; 763 } 764 765 public void setWallpaperComponent(ComponentName name) { 766 checkPermission(android.Manifest.permission.SET_WALLPAPER_COMPONENT); 767 synchronized (mLock) { 768 if (DEBUG) Slog.v(TAG, "setWallpaperComponent name=" + name); 769 int userId = UserHandle.getCallingUserId(); 770 WallpaperData wallpaper = mWallpaperMap.get(userId); 771 if (wallpaper == null) { 772 throw new IllegalStateException("Wallpaper not yet initialized for user " + userId); 773 } 774 final long ident = Binder.clearCallingIdentity(); 775 try { 776 wallpaper.imageWallpaperPending = false; 777 bindWallpaperComponentLocked(name, false, true, wallpaper, null); 778 } finally { 779 Binder.restoreCallingIdentity(ident); 780 } 781 } 782 } 783 784 boolean bindWallpaperComponentLocked(ComponentName componentName, boolean force, 785 boolean fromUser, WallpaperData wallpaper, IRemoteCallback reply) { 786 if (DEBUG) Slog.v(TAG, "bindWallpaperComponentLocked: componentName=" + componentName); 787 // Has the component changed? 788 if (!force) { 789 if (wallpaper.connection != null) { 790 if (wallpaper.wallpaperComponent == null) { 791 if (componentName == null) { 792 if (DEBUG) Slog.v(TAG, "bindWallpaperComponentLocked: still using default"); 793 // Still using default wallpaper. 794 return true; 795 } 796 } else if (wallpaper.wallpaperComponent.equals(componentName)) { 797 // Changing to same wallpaper. 798 if (DEBUG) Slog.v(TAG, "same wallpaper"); 799 return true; 800 } 801 } 802 } 803 804 try { 805 if (componentName == null) { 806 String defaultComponent = 807 mContext.getString(com.android.internal.R.string.default_wallpaper_component); 808 if (defaultComponent != null) { 809 // See if there is a default wallpaper component specified 810 componentName = ComponentName.unflattenFromString(defaultComponent); 811 if (DEBUG) Slog.v(TAG, "Use default component wallpaper:" + componentName); 812 } 813 if (componentName == null) { 814 // Fall back to static image wallpaper 815 componentName = IMAGE_WALLPAPER; 816 //clearWallpaperComponentLocked(); 817 //return; 818 if (DEBUG) Slog.v(TAG, "Using image wallpaper"); 819 } 820 } 821 int serviceUserId = wallpaper.userId; 822 ServiceInfo si = mIPackageManager.getServiceInfo(componentName, 823 PackageManager.GET_META_DATA | PackageManager.GET_PERMISSIONS, serviceUserId); 824 if (!android.Manifest.permission.BIND_WALLPAPER.equals(si.permission)) { 825 String msg = "Selected service does not require " 826 + android.Manifest.permission.BIND_WALLPAPER 827 + ": " + componentName; 828 if (fromUser) { 829 throw new SecurityException(msg); 830 } 831 Slog.w(TAG, msg); 832 return false; 833 } 834 835 WallpaperInfo wi = null; 836 837 Intent intent = new Intent(WallpaperService.SERVICE_INTERFACE); 838 if (componentName != null && !componentName.equals(IMAGE_WALLPAPER)) { 839 // Make sure the selected service is actually a wallpaper service. 840 List<ResolveInfo> ris = 841 mIPackageManager.queryIntentServices(intent, 842 intent.resolveTypeIfNeeded(mContext.getContentResolver()), 843 PackageManager.GET_META_DATA, serviceUserId); 844 for (int i=0; i<ris.size(); i++) { 845 ServiceInfo rsi = ris.get(i).serviceInfo; 846 if (rsi.name.equals(si.name) && 847 rsi.packageName.equals(si.packageName)) { 848 try { 849 wi = new WallpaperInfo(mContext, ris.get(i)); 850 } catch (XmlPullParserException e) { 851 if (fromUser) { 852 throw new IllegalArgumentException(e); 853 } 854 Slog.w(TAG, e); 855 return false; 856 } catch (IOException e) { 857 if (fromUser) { 858 throw new IllegalArgumentException(e); 859 } 860 Slog.w(TAG, e); 861 return false; 862 } 863 break; 864 } 865 } 866 if (wi == null) { 867 String msg = "Selected service is not a wallpaper: " 868 + componentName; 869 if (fromUser) { 870 throw new SecurityException(msg); 871 } 872 Slog.w(TAG, msg); 873 return false; 874 } 875 } 876 877 // Bind the service! 878 if (DEBUG) Slog.v(TAG, "Binding to:" + componentName); 879 WallpaperConnection newConn = new WallpaperConnection(wi, wallpaper); 880 intent.setComponent(componentName); 881 intent.putExtra(Intent.EXTRA_CLIENT_LABEL, 882 com.android.internal.R.string.wallpaper_binding_label); 883 intent.putExtra(Intent.EXTRA_CLIENT_INTENT, PendingIntent.getActivityAsUser( 884 mContext, 0, 885 Intent.createChooser(new Intent(Intent.ACTION_SET_WALLPAPER), 886 mContext.getText(com.android.internal.R.string.chooser_wallpaper)), 887 0, null, new UserHandle(serviceUserId))); 888 if (!mContext.bindService(intent, newConn, Context.BIND_AUTO_CREATE, serviceUserId)) { 889 String msg = "Unable to bind service: " 890 + componentName; 891 if (fromUser) { 892 throw new IllegalArgumentException(msg); 893 } 894 Slog.w(TAG, msg); 895 return false; 896 } 897 if (wallpaper.userId == mCurrentUserId && mLastWallpaper != null) { 898 detachWallpaperLocked(mLastWallpaper); 899 } 900 wallpaper.wallpaperComponent = componentName; 901 wallpaper.connection = newConn; 902 wallpaper.lastDiedTime = SystemClock.uptimeMillis(); 903 newConn.mReply = reply; 904 try { 905 if (wallpaper.userId == mCurrentUserId) { 906 if (DEBUG) 907 Slog.v(TAG, "Adding window token: " + newConn.mToken); 908 mIWindowManager.addWindowToken(newConn.mToken, 909 WindowManager.LayoutParams.TYPE_WALLPAPER); 910 mLastWallpaper = wallpaper; 911 } 912 } catch (RemoteException e) { 913 } 914 } catch (RemoteException e) { 915 String msg = "Remote exception for " + componentName + "\n" + e; 916 if (fromUser) { 917 throw new IllegalArgumentException(msg); 918 } 919 Slog.w(TAG, msg); 920 return false; 921 } 922 return true; 923 } 924 925 void detachWallpaperLocked(WallpaperData wallpaper) { 926 if (wallpaper.connection != null) { 927 if (wallpaper.connection.mReply != null) { 928 try { 929 wallpaper.connection.mReply.sendResult(null); 930 } catch (RemoteException e) { 931 } 932 wallpaper.connection.mReply = null; 933 } 934 if (wallpaper.connection.mEngine != null) { 935 try { 936 wallpaper.connection.mEngine.destroy(); 937 } catch (RemoteException e) { 938 } 939 } 940 mContext.unbindService(wallpaper.connection); 941 try { 942 if (DEBUG) 943 Slog.v(TAG, "Removing window token: " + wallpaper.connection.mToken); 944 mIWindowManager.removeWindowToken(wallpaper.connection.mToken); 945 } catch (RemoteException e) { 946 } 947 wallpaper.connection.mService = null; 948 wallpaper.connection.mEngine = null; 949 wallpaper.connection = null; 950 } 951 } 952 953 void clearWallpaperComponentLocked(WallpaperData wallpaper) { 954 wallpaper.wallpaperComponent = null; 955 detachWallpaperLocked(wallpaper); 956 } 957 958 void attachServiceLocked(WallpaperConnection conn, WallpaperData wallpaper) { 959 try { 960 conn.mService.attach(conn, conn.mToken, 961 WindowManager.LayoutParams.TYPE_WALLPAPER, false, 962 wallpaper.width, wallpaper.height); 963 } catch (RemoteException e) { 964 Slog.w(TAG, "Failed attaching wallpaper; clearing", e); 965 if (!wallpaper.wallpaperUpdating) { 966 bindWallpaperComponentLocked(null, false, false, wallpaper, null); 967 } 968 } 969 } 970 971 private void notifyCallbacksLocked(WallpaperData wallpaper) { 972 final int n = wallpaper.callbacks.beginBroadcast(); 973 for (int i = 0; i < n; i++) { 974 try { 975 wallpaper.callbacks.getBroadcastItem(i).onWallpaperChanged(); 976 } catch (RemoteException e) { 977 978 // The RemoteCallbackList will take care of removing 979 // the dead object for us. 980 } 981 } 982 wallpaper.callbacks.finishBroadcast(); 983 final Intent intent = new Intent(Intent.ACTION_WALLPAPER_CHANGED); 984 mContext.sendBroadcastAsUser(intent, new UserHandle(mCurrentUserId)); 985 } 986 987 private void checkPermission(String permission) { 988 if (PackageManager.PERMISSION_GRANTED!= mContext.checkCallingOrSelfPermission(permission)) { 989 throw new SecurityException("Access denied to process: " + Binder.getCallingPid() 990 + ", must have permission " + permission); 991 } 992 } 993 994 private static JournaledFile makeJournaledFile(int userId) { 995 final String base = new File(getWallpaperDir(userId), WALLPAPER_INFO).getAbsolutePath(); 996 return new JournaledFile(new File(base), new File(base + ".tmp")); 997 } 998 999 private void saveSettingsLocked(WallpaperData wallpaper) { 1000 JournaledFile journal = makeJournaledFile(wallpaper.userId); 1001 FileOutputStream stream = null; 1002 try { 1003 stream = new FileOutputStream(journal.chooseForWrite(), false); 1004 XmlSerializer out = new FastXmlSerializer(); 1005 out.setOutput(stream, "utf-8"); 1006 out.startDocument(null, true); 1007 1008 out.startTag(null, "wp"); 1009 out.attribute(null, "width", Integer.toString(wallpaper.width)); 1010 out.attribute(null, "height", Integer.toString(wallpaper.height)); 1011 out.attribute(null, "name", wallpaper.name); 1012 if (wallpaper.wallpaperComponent != null 1013 && !wallpaper.wallpaperComponent.equals(IMAGE_WALLPAPER)) { 1014 out.attribute(null, "component", 1015 wallpaper.wallpaperComponent.flattenToShortString()); 1016 } 1017 out.endTag(null, "wp"); 1018 1019 out.endDocument(); 1020 stream.close(); 1021 journal.commit(); 1022 } catch (IOException e) { 1023 try { 1024 if (stream != null) { 1025 stream.close(); 1026 } 1027 } catch (IOException ex) { 1028 // Ignore 1029 } 1030 journal.rollback(); 1031 } 1032 } 1033 1034 private void migrateFromOld() { 1035 File oldWallpaper = new File(WallpaperBackupHelper.WALLPAPER_IMAGE_KEY); 1036 File oldInfo = new File(WallpaperBackupHelper.WALLPAPER_INFO_KEY); 1037 if (oldWallpaper.exists()) { 1038 File newWallpaper = new File(getWallpaperDir(0), WALLPAPER); 1039 oldWallpaper.renameTo(newWallpaper); 1040 } 1041 if (oldInfo.exists()) { 1042 File newInfo = new File(getWallpaperDir(0), WALLPAPER_INFO); 1043 oldInfo.renameTo(newInfo); 1044 } 1045 } 1046 1047 private void loadSettingsLocked(int userId) { 1048 if (DEBUG) Slog.v(TAG, "loadSettingsLocked"); 1049 1050 JournaledFile journal = makeJournaledFile(userId); 1051 FileInputStream stream = null; 1052 File file = journal.chooseForRead(); 1053 if (!file.exists()) { 1054 // This should only happen one time, when upgrading from a legacy system 1055 migrateFromOld(); 1056 } 1057 WallpaperData wallpaper = mWallpaperMap.get(userId); 1058 if (wallpaper == null) { 1059 wallpaper = new WallpaperData(userId); 1060 mWallpaperMap.put(userId, wallpaper); 1061 } 1062 boolean success = false; 1063 try { 1064 stream = new FileInputStream(file); 1065 XmlPullParser parser = Xml.newPullParser(); 1066 parser.setInput(stream, null); 1067 1068 int type; 1069 do { 1070 type = parser.next(); 1071 if (type == XmlPullParser.START_TAG) { 1072 String tag = parser.getName(); 1073 if ("wp".equals(tag)) { 1074 wallpaper.width = Integer.parseInt(parser.getAttributeValue(null, "width")); 1075 wallpaper.height = Integer.parseInt(parser 1076 .getAttributeValue(null, "height")); 1077 wallpaper.name = parser.getAttributeValue(null, "name"); 1078 String comp = parser.getAttributeValue(null, "component"); 1079 wallpaper.nextWallpaperComponent = comp != null 1080 ? ComponentName.unflattenFromString(comp) 1081 : null; 1082 if (wallpaper.nextWallpaperComponent == null 1083 || "android".equals(wallpaper.nextWallpaperComponent 1084 .getPackageName())) { 1085 wallpaper.nextWallpaperComponent = IMAGE_WALLPAPER; 1086 } 1087 1088 if (DEBUG) { 1089 Slog.v(TAG, "mWidth:" + wallpaper.width); 1090 Slog.v(TAG, "mHeight:" + wallpaper.height); 1091 Slog.v(TAG, "mName:" + wallpaper.name); 1092 Slog.v(TAG, "mNextWallpaperComponent:" 1093 + wallpaper.nextWallpaperComponent); 1094 } 1095 } 1096 } 1097 } while (type != XmlPullParser.END_DOCUMENT); 1098 success = true; 1099 } catch (NullPointerException e) { 1100 Slog.w(TAG, "failed parsing " + file + " " + e); 1101 } catch (NumberFormatException e) { 1102 Slog.w(TAG, "failed parsing " + file + " " + e); 1103 } catch (XmlPullParserException e) { 1104 Slog.w(TAG, "failed parsing " + file + " " + e); 1105 } catch (IOException e) { 1106 Slog.w(TAG, "failed parsing " + file + " " + e); 1107 } catch (IndexOutOfBoundsException e) { 1108 Slog.w(TAG, "failed parsing " + file + " " + e); 1109 } 1110 try { 1111 if (stream != null) { 1112 stream.close(); 1113 } 1114 } catch (IOException e) { 1115 // Ignore 1116 } 1117 1118 if (!success) { 1119 wallpaper.width = -1; 1120 wallpaper.height = -1; 1121 wallpaper.name = ""; 1122 } 1123 1124 // We always want to have some reasonable width hint. 1125 WindowManager wm = (WindowManager)mContext.getSystemService(Context.WINDOW_SERVICE); 1126 Display d = wm.getDefaultDisplay(); 1127 int baseSize = d.getMaximumSizeDimension(); 1128 if (wallpaper.width < baseSize) { 1129 wallpaper.width = baseSize; 1130 } 1131 if (wallpaper.height < baseSize) { 1132 wallpaper.height = baseSize; 1133 } 1134 } 1135 1136 // Called by SystemBackupAgent after files are restored to disk. 1137 void settingsRestored() { 1138 // TODO: If necessary, make it work for secondary users as well. This currently assumes 1139 // restores only to the primary user 1140 if (DEBUG) Slog.v(TAG, "settingsRestored"); 1141 WallpaperData wallpaper = null; 1142 boolean success = false; 1143 synchronized (mLock) { 1144 loadSettingsLocked(0); 1145 wallpaper = mWallpaperMap.get(0); 1146 if (wallpaper.nextWallpaperComponent != null 1147 && !wallpaper.nextWallpaperComponent.equals(IMAGE_WALLPAPER)) { 1148 if (!bindWallpaperComponentLocked(wallpaper.nextWallpaperComponent, false, false, 1149 wallpaper, null)) { 1150 // No such live wallpaper or other failure; fall back to the default 1151 // live wallpaper (since the profile being restored indicated that the 1152 // user had selected a live rather than static one). 1153 bindWallpaperComponentLocked(null, false, false, wallpaper, null); 1154 } 1155 success = true; 1156 } else { 1157 // If there's a wallpaper name, we use that. If that can't be loaded, then we 1158 // use the default. 1159 if ("".equals(wallpaper.name)) { 1160 if (DEBUG) Slog.v(TAG, "settingsRestored: name is empty"); 1161 success = true; 1162 } else { 1163 if (DEBUG) Slog.v(TAG, "settingsRestored: attempting to restore named resource"); 1164 success = restoreNamedResourceLocked(wallpaper); 1165 } 1166 if (DEBUG) Slog.v(TAG, "settingsRestored: success=" + success); 1167 if (success) { 1168 bindWallpaperComponentLocked(wallpaper.nextWallpaperComponent, false, false, 1169 wallpaper, null); 1170 } 1171 } 1172 } 1173 1174 if (!success) { 1175 Slog.e(TAG, "Failed to restore wallpaper: '" + wallpaper.name + "'"); 1176 wallpaper.name = ""; 1177 getWallpaperDir(0).delete(); 1178 } 1179 1180 synchronized (mLock) { 1181 saveSettingsLocked(wallpaper); 1182 } 1183 } 1184 1185 boolean restoreNamedResourceLocked(WallpaperData wallpaper) { 1186 if (wallpaper.name.length() > 4 && "res:".equals(wallpaper.name.substring(0, 4))) { 1187 String resName = wallpaper.name.substring(4); 1188 1189 String pkg = null; 1190 int colon = resName.indexOf(':'); 1191 if (colon > 0) { 1192 pkg = resName.substring(0, colon); 1193 } 1194 1195 String ident = null; 1196 int slash = resName.lastIndexOf('/'); 1197 if (slash > 0) { 1198 ident = resName.substring(slash+1); 1199 } 1200 1201 String type = null; 1202 if (colon > 0 && slash > 0 && (slash-colon) > 1) { 1203 type = resName.substring(colon+1, slash); 1204 } 1205 1206 if (pkg != null && ident != null && type != null) { 1207 int resId = -1; 1208 InputStream res = null; 1209 FileOutputStream fos = null; 1210 try { 1211 Context c = mContext.createPackageContext(pkg, Context.CONTEXT_RESTRICTED); 1212 Resources r = c.getResources(); 1213 resId = r.getIdentifier(resName, null, null); 1214 if (resId == 0) { 1215 Slog.e(TAG, "couldn't resolve identifier pkg=" + pkg + " type=" + type 1216 + " ident=" + ident); 1217 return false; 1218 } 1219 1220 res = r.openRawResource(resId); 1221 if (wallpaper.wallpaperFile.exists()) { 1222 wallpaper.wallpaperFile.delete(); 1223 } 1224 fos = new FileOutputStream(wallpaper.wallpaperFile); 1225 1226 byte[] buffer = new byte[32768]; 1227 int amt; 1228 while ((amt=res.read(buffer)) > 0) { 1229 fos.write(buffer, 0, amt); 1230 } 1231 // mWallpaperObserver will notice the close and send the change broadcast 1232 1233 Slog.v(TAG, "Restored wallpaper: " + resName); 1234 return true; 1235 } catch (NameNotFoundException e) { 1236 Slog.e(TAG, "Package name " + pkg + " not found"); 1237 } catch (Resources.NotFoundException e) { 1238 Slog.e(TAG, "Resource not found: " + resId); 1239 } catch (IOException e) { 1240 Slog.e(TAG, "IOException while restoring wallpaper ", e); 1241 } finally { 1242 if (res != null) { 1243 try { 1244 res.close(); 1245 } catch (IOException ex) {} 1246 } 1247 if (fos != null) { 1248 FileUtils.sync(fos); 1249 try { 1250 fos.close(); 1251 } catch (IOException ex) {} 1252 } 1253 } 1254 } 1255 } 1256 return false; 1257 } 1258 1259 @Override 1260 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1261 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1262 != PackageManager.PERMISSION_GRANTED) { 1263 1264 pw.println("Permission Denial: can't dump wallpaper service from from pid=" 1265 + Binder.getCallingPid() 1266 + ", uid=" + Binder.getCallingUid()); 1267 return; 1268 } 1269 1270 synchronized (mLock) { 1271 pw.println("Current Wallpaper Service state:"); 1272 for (int i = 0; i < mWallpaperMap.size(); i++) { 1273 WallpaperData wallpaper = mWallpaperMap.valueAt(i); 1274 pw.println(" User " + wallpaper.userId + ":"); 1275 pw.print(" mWidth="); 1276 pw.print(wallpaper.width); 1277 pw.print(" mHeight="); 1278 pw.println(wallpaper.height); 1279 pw.print(" mName="); 1280 pw.println(wallpaper.name); 1281 pw.print(" mWallpaperComponent="); 1282 pw.println(wallpaper.wallpaperComponent); 1283 if (wallpaper.connection != null) { 1284 WallpaperConnection conn = wallpaper.connection; 1285 pw.print(" Wallpaper connection "); 1286 pw.print(conn); 1287 pw.println(":"); 1288 if (conn.mInfo != null) { 1289 pw.print(" mInfo.component="); 1290 pw.println(conn.mInfo.getComponent()); 1291 } 1292 pw.print(" mToken="); 1293 pw.println(conn.mToken); 1294 pw.print(" mService="); 1295 pw.println(conn.mService); 1296 pw.print(" mEngine="); 1297 pw.println(conn.mEngine); 1298 pw.print(" mLastDiedTime="); 1299 pw.println(wallpaper.lastDiedTime - SystemClock.uptimeMillis()); 1300 } 1301 } 1302 } 1303 } 1304} 1305