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 17 package com.android.server; 18 19 import static android.os.ParcelFileDescriptor.*; 20 21 import android.app.ActivityManagerNative; 22 import android.app.AppGlobals; 23 import android.app.IUserSwitchObserver; 24 import android.app.IWallpaperManager; 25 import android.app.IWallpaperManagerCallback; 26 import android.app.PendingIntent; 27 import android.app.WallpaperInfo; 28 import android.app.backup.BackupManager; 29 import android.app.backup.WallpaperBackupHelper; 30 import android.content.BroadcastReceiver; 31 import android.content.ComponentName; 32 import android.content.Context; 33 import android.content.Intent; 34 import android.content.IntentFilter; 35 import android.content.ServiceConnection; 36 import android.content.pm.IPackageManager; 37 import android.content.pm.PackageManager; 38 import android.content.pm.ResolveInfo; 39 import android.content.pm.ServiceInfo; 40 import android.content.pm.PackageManager.NameNotFoundException; 41 import android.content.pm.UserInfo; 42 import android.content.res.Resources; 43 import android.os.Binder; 44 import android.os.Bundle; 45 import android.os.Environment; 46 import android.os.FileUtils; 47 import android.os.IBinder; 48 import android.os.IRemoteCallback; 49 import android.os.RemoteException; 50 import android.os.FileObserver; 51 import android.os.ParcelFileDescriptor; 52 import android.os.RemoteCallbackList; 53 import android.os.SELinux; 54 import android.os.ServiceManager; 55 import android.os.SystemClock; 56 import android.os.UserHandle; 57 import android.os.UserManager; 58 import android.service.wallpaper.IWallpaperConnection; 59 import android.service.wallpaper.IWallpaperEngine; 60 import android.service.wallpaper.IWallpaperService; 61 import android.service.wallpaper.WallpaperService; 62 import android.util.Slog; 63 import android.util.SparseArray; 64 import android.util.Xml; 65 import android.view.Display; 66 import android.view.IWindowManager; 67 import android.view.WindowManager; 68 69 import java.io.FileDescriptor; 70 import java.io.IOException; 71 import java.io.InputStream; 72 import java.io.File; 73 import java.io.FileNotFoundException; 74 import java.io.FileInputStream; 75 import java.io.FileOutputStream; 76 import java.io.PrintWriter; 77 import java.util.List; 78 79 import org.xmlpull.v1.XmlPullParser; 80 import org.xmlpull.v1.XmlPullParserException; 81 import org.xmlpull.v1.XmlSerializer; 82 83 import com.android.internal.content.PackageMonitor; 84 import com.android.internal.util.FastXmlSerializer; 85 import com.android.internal.util.JournaledFile; 86 87 class 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.bindServiceAsUser(intent, newConn, Context.BIND_AUTO_CREATE, 889 new UserHandle(serviceUserId))) { 890 String msg = "Unable to bind service: " 891 + componentName; 892 if (fromUser) { 893 throw new IllegalArgumentException(msg); 894 } 895 Slog.w(TAG, msg); 896 return false; 897 } 898 if (wallpaper.userId == mCurrentUserId && mLastWallpaper != null) { 899 detachWallpaperLocked(mLastWallpaper); 900 } 901 wallpaper.wallpaperComponent = componentName; 902 wallpaper.connection = newConn; 903 wallpaper.lastDiedTime = SystemClock.uptimeMillis(); 904 newConn.mReply = reply; 905 try { 906 if (wallpaper.userId == mCurrentUserId) { 907 if (DEBUG) 908 Slog.v(TAG, "Adding window token: " + newConn.mToken); 909 mIWindowManager.addWindowToken(newConn.mToken, 910 WindowManager.LayoutParams.TYPE_WALLPAPER); 911 mLastWallpaper = wallpaper; 912 } 913 } catch (RemoteException e) { 914 } 915 } catch (RemoteException e) { 916 String msg = "Remote exception for " + componentName + "\n" + e; 917 if (fromUser) { 918 throw new IllegalArgumentException(msg); 919 } 920 Slog.w(TAG, msg); 921 return false; 922 } 923 return true; 924 } 925 926 void detachWallpaperLocked(WallpaperData wallpaper) { 927 if (wallpaper.connection != null) { 928 if (wallpaper.connection.mReply != null) { 929 try { 930 wallpaper.connection.mReply.sendResult(null); 931 } catch (RemoteException e) { 932 } 933 wallpaper.connection.mReply = null; 934 } 935 if (wallpaper.connection.mEngine != null) { 936 try { 937 wallpaper.connection.mEngine.destroy(); 938 } catch (RemoteException e) { 939 } 940 } 941 mContext.unbindService(wallpaper.connection); 942 try { 943 if (DEBUG) 944 Slog.v(TAG, "Removing window token: " + wallpaper.connection.mToken); 945 mIWindowManager.removeWindowToken(wallpaper.connection.mToken); 946 } catch (RemoteException e) { 947 } 948 wallpaper.connection.mService = null; 949 wallpaper.connection.mEngine = null; 950 wallpaper.connection = null; 951 } 952 } 953 954 void clearWallpaperComponentLocked(WallpaperData wallpaper) { 955 wallpaper.wallpaperComponent = null; 956 detachWallpaperLocked(wallpaper); 957 } 958 959 void attachServiceLocked(WallpaperConnection conn, WallpaperData wallpaper) { 960 try { 961 conn.mService.attach(conn, conn.mToken, 962 WindowManager.LayoutParams.TYPE_WALLPAPER, false, 963 wallpaper.width, wallpaper.height); 964 } catch (RemoteException e) { 965 Slog.w(TAG, "Failed attaching wallpaper; clearing", e); 966 if (!wallpaper.wallpaperUpdating) { 967 bindWallpaperComponentLocked(null, false, false, wallpaper, null); 968 } 969 } 970 } 971 972 private void notifyCallbacksLocked(WallpaperData wallpaper) { 973 final int n = wallpaper.callbacks.beginBroadcast(); 974 for (int i = 0; i < n; i++) { 975 try { 976 wallpaper.callbacks.getBroadcastItem(i).onWallpaperChanged(); 977 } catch (RemoteException e) { 978 979 // The RemoteCallbackList will take care of removing 980 // the dead object for us. 981 } 982 } 983 wallpaper.callbacks.finishBroadcast(); 984 final Intent intent = new Intent(Intent.ACTION_WALLPAPER_CHANGED); 985 mContext.sendBroadcastAsUser(intent, new UserHandle(mCurrentUserId)); 986 } 987 988 private void checkPermission(String permission) { 989 if (PackageManager.PERMISSION_GRANTED!= mContext.checkCallingOrSelfPermission(permission)) { 990 throw new SecurityException("Access denied to process: " + Binder.getCallingPid() 991 + ", must have permission " + permission); 992 } 993 } 994 995 private static JournaledFile makeJournaledFile(int userId) { 996 final String base = new File(getWallpaperDir(userId), WALLPAPER_INFO).getAbsolutePath(); 997 return new JournaledFile(new File(base), new File(base + ".tmp")); 998 } 999 1000 private void saveSettingsLocked(WallpaperData wallpaper) { 1001 JournaledFile journal = makeJournaledFile(wallpaper.userId); 1002 FileOutputStream stream = null; 1003 try { 1004 stream = new FileOutputStream(journal.chooseForWrite(), false); 1005 XmlSerializer out = new FastXmlSerializer(); 1006 out.setOutput(stream, "utf-8"); 1007 out.startDocument(null, true); 1008 1009 out.startTag(null, "wp"); 1010 out.attribute(null, "width", Integer.toString(wallpaper.width)); 1011 out.attribute(null, "height", Integer.toString(wallpaper.height)); 1012 out.attribute(null, "name", wallpaper.name); 1013 if (wallpaper.wallpaperComponent != null 1014 && !wallpaper.wallpaperComponent.equals(IMAGE_WALLPAPER)) { 1015 out.attribute(null, "component", 1016 wallpaper.wallpaperComponent.flattenToShortString()); 1017 } 1018 out.endTag(null, "wp"); 1019 1020 out.endDocument(); 1021 stream.close(); 1022 journal.commit(); 1023 } catch (IOException e) { 1024 try { 1025 if (stream != null) { 1026 stream.close(); 1027 } 1028 } catch (IOException ex) { 1029 // Ignore 1030 } 1031 journal.rollback(); 1032 } 1033 } 1034 1035 private void migrateFromOld() { 1036 File oldWallpaper = new File(WallpaperBackupHelper.WALLPAPER_IMAGE_KEY); 1037 File oldInfo = new File(WallpaperBackupHelper.WALLPAPER_INFO_KEY); 1038 if (oldWallpaper.exists()) { 1039 File newWallpaper = new File(getWallpaperDir(0), WALLPAPER); 1040 oldWallpaper.renameTo(newWallpaper); 1041 } 1042 if (oldInfo.exists()) { 1043 File newInfo = new File(getWallpaperDir(0), WALLPAPER_INFO); 1044 oldInfo.renameTo(newInfo); 1045 } 1046 } 1047 1048 private void loadSettingsLocked(int userId) { 1049 if (DEBUG) Slog.v(TAG, "loadSettingsLocked"); 1050 1051 JournaledFile journal = makeJournaledFile(userId); 1052 FileInputStream stream = null; 1053 File file = journal.chooseForRead(); 1054 if (!file.exists()) { 1055 // This should only happen one time, when upgrading from a legacy system 1056 migrateFromOld(); 1057 } 1058 WallpaperData wallpaper = mWallpaperMap.get(userId); 1059 if (wallpaper == null) { 1060 wallpaper = new WallpaperData(userId); 1061 mWallpaperMap.put(userId, wallpaper); 1062 } 1063 boolean success = false; 1064 try { 1065 stream = new FileInputStream(file); 1066 XmlPullParser parser = Xml.newPullParser(); 1067 parser.setInput(stream, null); 1068 1069 int type; 1070 do { 1071 type = parser.next(); 1072 if (type == XmlPullParser.START_TAG) { 1073 String tag = parser.getName(); 1074 if ("wp".equals(tag)) { 1075 wallpaper.width = Integer.parseInt(parser.getAttributeValue(null, "width")); 1076 wallpaper.height = Integer.parseInt(parser 1077 .getAttributeValue(null, "height")); 1078 wallpaper.name = parser.getAttributeValue(null, "name"); 1079 String comp = parser.getAttributeValue(null, "component"); 1080 wallpaper.nextWallpaperComponent = comp != null 1081 ? ComponentName.unflattenFromString(comp) 1082 : null; 1083 if (wallpaper.nextWallpaperComponent == null 1084 || "android".equals(wallpaper.nextWallpaperComponent 1085 .getPackageName())) { 1086 wallpaper.nextWallpaperComponent = IMAGE_WALLPAPER; 1087 } 1088 1089 if (DEBUG) { 1090 Slog.v(TAG, "mWidth:" + wallpaper.width); 1091 Slog.v(TAG, "mHeight:" + wallpaper.height); 1092 Slog.v(TAG, "mName:" + wallpaper.name); 1093 Slog.v(TAG, "mNextWallpaperComponent:" 1094 + wallpaper.nextWallpaperComponent); 1095 } 1096 } 1097 } 1098 } while (type != XmlPullParser.END_DOCUMENT); 1099 success = true; 1100 } catch (FileNotFoundException e) { 1101 Slog.w(TAG, "no current wallpaper -- first boot?"); 1102 } catch (NullPointerException e) { 1103 Slog.w(TAG, "failed parsing " + file + " " + e); 1104 } catch (NumberFormatException e) { 1105 Slog.w(TAG, "failed parsing " + file + " " + e); 1106 } catch (XmlPullParserException e) { 1107 Slog.w(TAG, "failed parsing " + file + " " + e); 1108 } catch (IOException e) { 1109 Slog.w(TAG, "failed parsing " + file + " " + e); 1110 } catch (IndexOutOfBoundsException e) { 1111 Slog.w(TAG, "failed parsing " + file + " " + e); 1112 } 1113 try { 1114 if (stream != null) { 1115 stream.close(); 1116 } 1117 } catch (IOException e) { 1118 // Ignore 1119 } 1120 1121 if (!success) { 1122 wallpaper.width = -1; 1123 wallpaper.height = -1; 1124 wallpaper.name = ""; 1125 } 1126 1127 // We always want to have some reasonable width hint. 1128 WindowManager wm = (WindowManager)mContext.getSystemService(Context.WINDOW_SERVICE); 1129 Display d = wm.getDefaultDisplay(); 1130 int baseSize = d.getMaximumSizeDimension(); 1131 if (wallpaper.width < baseSize) { 1132 wallpaper.width = baseSize; 1133 } 1134 if (wallpaper.height < baseSize) { 1135 wallpaper.height = baseSize; 1136 } 1137 } 1138 1139 // Called by SystemBackupAgent after files are restored to disk. 1140 void settingsRestored() { 1141 // TODO: If necessary, make it work for secondary users as well. This currently assumes 1142 // restores only to the primary user 1143 if (DEBUG) Slog.v(TAG, "settingsRestored"); 1144 WallpaperData wallpaper = null; 1145 boolean success = false; 1146 synchronized (mLock) { 1147 loadSettingsLocked(0); 1148 wallpaper = mWallpaperMap.get(0); 1149 if (wallpaper.nextWallpaperComponent != null 1150 && !wallpaper.nextWallpaperComponent.equals(IMAGE_WALLPAPER)) { 1151 if (!bindWallpaperComponentLocked(wallpaper.nextWallpaperComponent, false, false, 1152 wallpaper, null)) { 1153 // No such live wallpaper or other failure; fall back to the default 1154 // live wallpaper (since the profile being restored indicated that the 1155 // user had selected a live rather than static one). 1156 bindWallpaperComponentLocked(null, false, false, wallpaper, null); 1157 } 1158 success = true; 1159 } else { 1160 // If there's a wallpaper name, we use that. If that can't be loaded, then we 1161 // use the default. 1162 if ("".equals(wallpaper.name)) { 1163 if (DEBUG) Slog.v(TAG, "settingsRestored: name is empty"); 1164 success = true; 1165 } else { 1166 if (DEBUG) Slog.v(TAG, "settingsRestored: attempting to restore named resource"); 1167 success = restoreNamedResourceLocked(wallpaper); 1168 } 1169 if (DEBUG) Slog.v(TAG, "settingsRestored: success=" + success); 1170 if (success) { 1171 bindWallpaperComponentLocked(wallpaper.nextWallpaperComponent, false, false, 1172 wallpaper, null); 1173 } 1174 } 1175 } 1176 1177 if (!success) { 1178 Slog.e(TAG, "Failed to restore wallpaper: '" + wallpaper.name + "'"); 1179 wallpaper.name = ""; 1180 getWallpaperDir(0).delete(); 1181 } 1182 1183 synchronized (mLock) { 1184 saveSettingsLocked(wallpaper); 1185 } 1186 } 1187 1188 boolean restoreNamedResourceLocked(WallpaperData wallpaper) { 1189 if (wallpaper.name.length() > 4 && "res:".equals(wallpaper.name.substring(0, 4))) { 1190 String resName = wallpaper.name.substring(4); 1191 1192 String pkg = null; 1193 int colon = resName.indexOf(':'); 1194 if (colon > 0) { 1195 pkg = resName.substring(0, colon); 1196 } 1197 1198 String ident = null; 1199 int slash = resName.lastIndexOf('/'); 1200 if (slash > 0) { 1201 ident = resName.substring(slash+1); 1202 } 1203 1204 String type = null; 1205 if (colon > 0 && slash > 0 && (slash-colon) > 1) { 1206 type = resName.substring(colon+1, slash); 1207 } 1208 1209 if (pkg != null && ident != null && type != null) { 1210 int resId = -1; 1211 InputStream res = null; 1212 FileOutputStream fos = null; 1213 try { 1214 Context c = mContext.createPackageContext(pkg, Context.CONTEXT_RESTRICTED); 1215 Resources r = c.getResources(); 1216 resId = r.getIdentifier(resName, null, null); 1217 if (resId == 0) { 1218 Slog.e(TAG, "couldn't resolve identifier pkg=" + pkg + " type=" + type 1219 + " ident=" + ident); 1220 return false; 1221 } 1222 1223 res = r.openRawResource(resId); 1224 if (wallpaper.wallpaperFile.exists()) { 1225 wallpaper.wallpaperFile.delete(); 1226 } 1227 fos = new FileOutputStream(wallpaper.wallpaperFile); 1228 1229 byte[] buffer = new byte[32768]; 1230 int amt; 1231 while ((amt=res.read(buffer)) > 0) { 1232 fos.write(buffer, 0, amt); 1233 } 1234 // mWallpaperObserver will notice the close and send the change broadcast 1235 1236 Slog.v(TAG, "Restored wallpaper: " + resName); 1237 return true; 1238 } catch (NameNotFoundException e) { 1239 Slog.e(TAG, "Package name " + pkg + " not found"); 1240 } catch (Resources.NotFoundException e) { 1241 Slog.e(TAG, "Resource not found: " + resId); 1242 } catch (IOException e) { 1243 Slog.e(TAG, "IOException while restoring wallpaper ", e); 1244 } finally { 1245 if (res != null) { 1246 try { 1247 res.close(); 1248 } catch (IOException ex) {} 1249 } 1250 if (fos != null) { 1251 FileUtils.sync(fos); 1252 try { 1253 fos.close(); 1254 } catch (IOException ex) {} 1255 } 1256 } 1257 } 1258 } 1259 return false; 1260 } 1261 1262 @Override 1263 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1264 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1265 != PackageManager.PERMISSION_GRANTED) { 1266 1267 pw.println("Permission Denial: can't dump wallpaper service from from pid=" 1268 + Binder.getCallingPid() 1269 + ", uid=" + Binder.getCallingUid()); 1270 return; 1271 } 1272 1273 synchronized (mLock) { 1274 pw.println("Current Wallpaper Service state:"); 1275 for (int i = 0; i < mWallpaperMap.size(); i++) { 1276 WallpaperData wallpaper = mWallpaperMap.valueAt(i); 1277 pw.println(" User " + wallpaper.userId + ":"); 1278 pw.print(" mWidth="); 1279 pw.print(wallpaper.width); 1280 pw.print(" mHeight="); 1281 pw.println(wallpaper.height); 1282 pw.print(" mName="); 1283 pw.println(wallpaper.name); 1284 pw.print(" mWallpaperComponent="); 1285 pw.println(wallpaper.wallpaperComponent); 1286 if (wallpaper.connection != null) { 1287 WallpaperConnection conn = wallpaper.connection; 1288 pw.print(" Wallpaper connection "); 1289 pw.print(conn); 1290 pw.println(":"); 1291 if (conn.mInfo != null) { 1292 pw.print(" mInfo.component="); 1293 pw.println(conn.mInfo.getComponent()); 1294 } 1295 pw.print(" mToken="); 1296 pw.println(conn.mToken); 1297 pw.print(" mService="); 1298 pw.println(conn.mService); 1299 pw.print(" mEngine="); 1300 pw.println(conn.mEngine); 1301 pw.print(" mLastDiedTime="); 1302 pw.println(wallpaper.lastDiedTime - SystemClock.uptimeMillis()); 1303 } 1304 } 1305 } 1306 } 1307 } 1308
