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.wallpaper; 18 19 import static android.app.WallpaperManager.FLAG_LOCK; 20 import static android.app.WallpaperManager.FLAG_SYSTEM; 21 import static android.os.ParcelFileDescriptor.MODE_CREATE; 22 import static android.os.ParcelFileDescriptor.MODE_READ_ONLY; 23 import static android.os.ParcelFileDescriptor.MODE_READ_WRITE; 24 import static android.os.ParcelFileDescriptor.MODE_TRUNCATE; 25 import static android.view.Display.DEFAULT_DISPLAY; 26 import static android.view.WindowManager.LayoutParams.TYPE_WALLPAPER; 27 28 import android.app.ActivityManager; 29 import android.app.AppGlobals; 30 import android.app.AppOpsManager; 31 import android.app.IWallpaperManager; 32 import android.app.IWallpaperManagerCallback; 33 import android.app.PendingIntent; 34 import android.app.UserSwitchObserver; 35 import android.app.WallpaperInfo; 36 import android.app.WallpaperManager; 37 import android.app.admin.DevicePolicyManager; 38 import android.app.backup.WallpaperBackupHelper; 39 import android.content.BroadcastReceiver; 40 import android.content.ComponentName; 41 import android.content.Context; 42 import android.content.Intent; 43 import android.content.IntentFilter; 44 import android.content.ServiceConnection; 45 import android.content.pm.IPackageManager; 46 import android.content.pm.PackageManager; 47 import android.content.pm.PackageManager.NameNotFoundException; 48 import android.content.pm.ResolveInfo; 49 import android.content.pm.ServiceInfo; 50 import android.content.pm.UserInfo; 51 import android.content.res.Resources; 52 import android.graphics.Bitmap; 53 import android.graphics.BitmapFactory; 54 import android.graphics.BitmapRegionDecoder; 55 import android.graphics.Point; 56 import android.graphics.Rect; 57 import android.os.Binder; 58 import android.os.Bundle; 59 import android.os.Environment; 60 import android.os.FileObserver; 61 import android.os.FileUtils; 62 import android.os.Handler; 63 import android.os.IBinder; 64 import android.os.IRemoteCallback; 65 import android.os.Process; 66 import android.os.ParcelFileDescriptor; 67 import android.os.RemoteCallbackList; 68 import android.os.RemoteException; 69 import android.os.SELinux; 70 import android.os.ServiceManager; 71 import android.os.SystemClock; 72 import android.os.UserHandle; 73 import android.os.UserManager; 74 import android.service.wallpaper.IWallpaperConnection; 75 import android.service.wallpaper.IWallpaperEngine; 76 import android.service.wallpaper.IWallpaperService; 77 import android.service.wallpaper.WallpaperService; 78 import android.system.ErrnoException; 79 import android.system.Os; 80 import android.util.EventLog; 81 import android.util.Slog; 82 import android.util.SparseArray; 83 import android.util.Xml; 84 import android.view.Display; 85 import android.view.IWindowManager; 86 import android.view.WindowManager; 87 88 import com.android.internal.R; 89 import com.android.internal.content.PackageMonitor; 90 import com.android.internal.os.BackgroundThread; 91 import com.android.internal.util.DumpUtils; 92 import com.android.internal.util.FastXmlSerializer; 93 import com.android.internal.util.JournaledFile; 94 import com.android.server.EventLogTags; 95 import com.android.server.FgThread; 96 import com.android.server.SystemService; 97 98 import libcore.io.IoUtils; 99 100 import org.xmlpull.v1.XmlPullParser; 101 import org.xmlpull.v1.XmlPullParserException; 102 import org.xmlpull.v1.XmlSerializer; 103 104 import java.io.BufferedOutputStream; 105 import java.io.File; 106 import java.io.FileDescriptor; 107 import java.io.FileInputStream; 108 import java.io.FileNotFoundException; 109 import java.io.FileOutputStream; 110 import java.io.IOException; 111 import java.io.InputStream; 112 import java.io.PrintWriter; 113 import java.nio.charset.StandardCharsets; 114 import java.util.Arrays; 115 import java.util.List; 116 import java.util.Objects; 117 118 public class WallpaperManagerService extends IWallpaperManager.Stub { 119 static final String TAG = "WallpaperManagerService"; 120 static final boolean DEBUG = false; 121 static final boolean DEBUG_LIVE = DEBUG || true; 122 123 public static class Lifecycle extends SystemService { 124 private WallpaperManagerService mService; 125 126 public Lifecycle(Context context) { 127 super(context); 128 } 129 130 @Override 131 public void onStart() { 132 mService = new WallpaperManagerService(getContext()); 133 publishBinderService(Context.WALLPAPER_SERVICE, mService); 134 } 135 136 @Override 137 public void onBootPhase(int phase) { 138 if (phase == SystemService.PHASE_ACTIVITY_MANAGER_READY) { 139 mService.systemReady(); 140 } else if (phase == SystemService.PHASE_THIRD_PARTY_APPS_CAN_START) { 141 mService.switchUser(UserHandle.USER_SYSTEM, null); 142 } 143 } 144 145 @Override 146 public void onUnlockUser(int userHandle) { 147 mService.onUnlockUser(userHandle); 148 } 149 } 150 151 final Object mLock = new Object(); 152 153 /** 154 * Minimum time between crashes of a wallpaper service for us to consider 155 * restarting it vs. just reverting to the static wallpaper. 156 */ 157 static final long MIN_WALLPAPER_CRASH_TIME = 10000; 158 static final int MAX_WALLPAPER_COMPONENT_LOG_LENGTH = 128; 159 static final String WALLPAPER = "wallpaper_orig"; 160 static final String WALLPAPER_CROP = "wallpaper"; 161 static final String WALLPAPER_LOCK_ORIG = "wallpaper_lock_orig"; 162 static final String WALLPAPER_LOCK_CROP = "wallpaper_lock"; 163 static final String WALLPAPER_INFO = "wallpaper_info.xml"; 164 165 // All the various per-user state files we need to be aware of 166 static final String[] sPerUserFiles = new String[] { 167 WALLPAPER, WALLPAPER_CROP, 168 WALLPAPER_LOCK_ORIG, WALLPAPER_LOCK_CROP, 169 WALLPAPER_INFO 170 }; 171 172 /** 173 * Observes the wallpaper for changes and notifies all IWallpaperServiceCallbacks 174 * that the wallpaper has changed. The CREATE is triggered when there is no 175 * wallpaper set and is created for the first time. The CLOSE_WRITE is triggered 176 * every time the wallpaper is changed. 177 */ 178 private class WallpaperObserver extends FileObserver { 179 180 final int mUserId; 181 final WallpaperData mWallpaper; 182 final File mWallpaperDir; 183 final File mWallpaperFile; 184 final File mWallpaperLockFile; 185 186 public WallpaperObserver(WallpaperData wallpaper) { 187 super(getWallpaperDir(wallpaper.userId).getAbsolutePath(), 188 CLOSE_WRITE | MOVED_TO | DELETE | DELETE_SELF); 189 mUserId = wallpaper.userId; 190 mWallpaperDir = getWallpaperDir(wallpaper.userId); 191 mWallpaper = wallpaper; 192 mWallpaperFile = new File(mWallpaperDir, WALLPAPER); 193 mWallpaperLockFile = new File(mWallpaperDir, WALLPAPER_LOCK_ORIG); 194 } 195 196 private WallpaperData dataForEvent(boolean sysChanged, boolean lockChanged) { 197 WallpaperData wallpaper = null; 198 synchronized (mLock) { 199 if (lockChanged) { 200 wallpaper = mLockWallpaperMap.get(mUserId); 201 } 202 if (wallpaper == null) { 203 // no lock-specific wallpaper exists, or sys case, handled together 204 wallpaper = mWallpaperMap.get(mUserId); 205 } 206 } 207 return (wallpaper != null) ? wallpaper : mWallpaper; 208 } 209 210 @Override 211 public void onEvent(int event, String path) { 212 if (path == null) { 213 return; 214 } 215 final boolean moved = (event == MOVED_TO); 216 final boolean written = (event == CLOSE_WRITE || moved); 217 final File changedFile = new File(mWallpaperDir, path); 218 219 // System and system+lock changes happen on the system wallpaper input file; 220 // lock-only changes happen on the dedicated lock wallpaper input file 221 final boolean sysWallpaperChanged = (mWallpaperFile.equals(changedFile)); 222 final boolean lockWallpaperChanged = (mWallpaperLockFile.equals(changedFile)); 223 WallpaperData wallpaper = dataForEvent(sysWallpaperChanged, lockWallpaperChanged); 224 225 if (DEBUG) { 226 Slog.v(TAG, "Wallpaper file change: evt=" + event 227 + " path=" + path 228 + " sys=" + sysWallpaperChanged 229 + " lock=" + lockWallpaperChanged 230 + " imagePending=" + wallpaper.imageWallpaperPending 231 + " whichPending=0x" + Integer.toHexString(wallpaper.whichPending) 232 + " written=" + written); 233 } 234 235 if (moved && lockWallpaperChanged) { 236 // We just migrated sys -> lock to preserve imagery for an impending 237 // new system-only wallpaper. Tell keyguard about it and make sure it 238 // has the right SELinux label. 239 if (DEBUG) { 240 Slog.i(TAG, "Sys -> lock MOVED_TO"); 241 } 242 SELinux.restorecon(changedFile); 243 notifyLockWallpaperChanged(); 244 return; 245 } 246 247 synchronized (mLock) { 248 if (sysWallpaperChanged || lockWallpaperChanged) { 249 notifyCallbacksLocked(wallpaper); 250 if (wallpaper.wallpaperComponent == null 251 || event != CLOSE_WRITE // includes the MOVED_TO case 252 || wallpaper.imageWallpaperPending) { 253 if (written) { 254 // The image source has finished writing the source image, 255 // so we now produce the crop rect (in the background), and 256 // only publish the new displayable (sub)image as a result 257 // of that work. 258 if (DEBUG) { 259 Slog.v(TAG, "Wallpaper written; generating crop"); 260 } 261 SELinux.restorecon(changedFile); 262 if (moved) { 263 // This is a restore, so generate the crop using any just-restored new 264 // crop guidelines, making sure to preserve our local dimension hints. 265 // We also make sure to reapply the correct SELinux label. 266 if (DEBUG) { 267 Slog.v(TAG, "moved-to, therefore restore; reloading metadata"); 268 } 269 loadSettingsLocked(wallpaper.userId, true); 270 } 271 generateCrop(wallpaper); 272 if (DEBUG) { 273 Slog.v(TAG, "Crop done; invoking completion callback"); 274 } 275 wallpaper.imageWallpaperPending = false; 276 if (wallpaper.setComplete != null) { 277 try { 278 wallpaper.setComplete.onWallpaperChanged(); 279 } catch (RemoteException e) { 280 // if this fails we don't really care; the setting app may just 281 // have crashed and that sort of thing is a fact of life. 282 } 283 } 284 if (sysWallpaperChanged) { 285 // If this was the system wallpaper, rebind... 286 bindWallpaperComponentLocked(mImageWallpaper, true, 287 false, wallpaper, null); 288 } 289 if (lockWallpaperChanged 290 || (wallpaper.whichPending & FLAG_LOCK) != 0) { 291 if (DEBUG) { 292 Slog.i(TAG, "Lock-relevant wallpaper changed"); 293 } 294 // either a lock-only wallpaper commit or a system+lock event. 295 // if it's system-plus-lock we need to wipe the lock bookkeeping; 296 // we're falling back to displaying the system wallpaper there. 297 if (!lockWallpaperChanged) { 298 mLockWallpaperMap.remove(wallpaper.userId); 299 } 300 // and in any case, tell keyguard about it 301 notifyLockWallpaperChanged(); 302 } 303 saveSettingsLocked(wallpaper.userId); 304 } 305 } 306 } 307 } 308 } 309 } 310 311 void notifyLockWallpaperChanged() { 312 final IWallpaperManagerCallback cb = mKeyguardListener; 313 if (cb != null) { 314 try { 315 cb.onWallpaperChanged(); 316 } catch (RemoteException e) { 317 // Oh well it went away; no big deal 318 } 319 } 320 } 321 322 /** 323 * Once a new wallpaper has been written via setWallpaper(...), it needs to be cropped 324 * for display. 325 */ 326 private void generateCrop(WallpaperData wallpaper) { 327 boolean success = false; 328 329 Rect cropHint = new Rect(wallpaper.cropHint); 330 331 if (DEBUG) { 332 Slog.v(TAG, "Generating crop for new wallpaper(s): 0x" 333 + Integer.toHexString(wallpaper.whichPending) 334 + " to " + wallpaper.cropFile.getName() 335 + " crop=(" + cropHint.width() + 'x' + cropHint.height() 336 + ") dim=(" + wallpaper.width + 'x' + wallpaper.height + ')'); 337 } 338 339 // Analyse the source; needed in multiple cases 340 BitmapFactory.Options options = new BitmapFactory.Options(); 341 options.inJustDecodeBounds = true; 342 BitmapFactory.decodeFile(wallpaper.wallpaperFile.getAbsolutePath(), options); 343 if (options.outWidth <= 0 || options.outHeight <= 0) { 344 Slog.w(TAG, "Invalid wallpaper data"); 345 success = false; 346 } else { 347 boolean needCrop = false; 348 boolean needScale = false; 349 350 // Empty crop means use the full image 351 if (cropHint.isEmpty()) { 352 cropHint.left = cropHint.top = 0; 353 cropHint.right = options.outWidth; 354 cropHint.bottom = options.outHeight; 355 } else { 356 // force the crop rect to lie within the measured bounds 357 cropHint.offset( 358 (cropHint.right > options.outWidth ? options.outWidth - cropHint.right : 0), 359 (cropHint.bottom > options.outHeight ? options.outHeight - cropHint.bottom : 0)); 360 361 // If the crop hint was larger than the image we just overshot. Patch things up. 362 if (cropHint.left < 0) { 363 cropHint.left = 0; 364 } 365 if (cropHint.top < 0) { 366 cropHint.top = 0; 367 } 368 369 // Don't bother cropping if what we're left with is identity 370 needCrop = (options.outHeight > cropHint.height() 371 || options.outWidth > cropHint.width()); 372 } 373 374 // scale if the crop height winds up not matching the recommended metrics 375 needScale = (wallpaper.height != cropHint.height()); 376 377 if (DEBUG) { 378 Slog.v(TAG, "crop: w=" + cropHint.width() + " h=" + cropHint.height()); 379 Slog.v(TAG, "dims: w=" + wallpaper.width + " h=" + wallpaper.height); 380 Slog.v(TAG, "meas: w=" + options.outWidth + " h=" + options.outHeight); 381 Slog.v(TAG, "crop?=" + needCrop + " scale?=" + needScale); 382 } 383 384 if (!needCrop && !needScale) { 385 // Simple case: the nominal crop fits what we want, so we take 386 // the whole thing and just copy the image file directly. 387 if (DEBUG) { 388 Slog.v(TAG, "Null crop of new wallpaper; copying"); 389 } 390 success = FileUtils.copyFile(wallpaper.wallpaperFile, wallpaper.cropFile); 391 if (!success) { 392 wallpaper.cropFile.delete(); 393 // TODO: fall back to default wallpaper in this case 394 } 395 } else { 396 // Fancy case: crop and scale. First, we decode and scale down if appropriate. 397 FileOutputStream f = null; 398 BufferedOutputStream bos = null; 399 try { 400 BitmapRegionDecoder decoder = BitmapRegionDecoder.newInstance( 401 wallpaper.wallpaperFile.getAbsolutePath(), false); 402 403 // This actually downsamples only by powers of two, but that's okay; we do 404 // a proper scaling blit later. This is to minimize transient RAM use. 405 // We calculate the largest power-of-two under the actual ratio rather than 406 // just let the decode take care of it because we also want to remap where the 407 // cropHint rectangle lies in the decoded [super]rect. 408 final BitmapFactory.Options scaler; 409 final int actualScale = cropHint.height() / wallpaper.height; 410 int scale = 1; 411 while (2*scale < actualScale) { 412 scale *= 2; 413 } 414 if (scale > 1) { 415 scaler = new BitmapFactory.Options(); 416 scaler.inSampleSize = scale; 417 if (DEBUG) { 418 Slog.v(TAG, "Downsampling cropped rect with scale " + scale); 419 } 420 } else { 421 scaler = null; 422 } 423 Bitmap cropped = decoder.decodeRegion(cropHint, scaler); 424 decoder.recycle(); 425 426 if (cropped == null) { 427 Slog.e(TAG, "Could not decode new wallpaper"); 428 } else { 429 // We've got the extracted crop; now we want to scale it properly to 430 // the desired rectangle. That's a height-biased operation: make it 431 // fit the hinted height, and accept whatever width we end up with. 432 cropHint.offsetTo(0, 0); 433 cropHint.right /= scale; // adjust by downsampling factor 434 cropHint.bottom /= scale; 435 final float heightR = ((float)wallpaper.height) / ((float)cropHint.height()); 436 if (DEBUG) { 437 Slog.v(TAG, "scale " + heightR + ", extracting " + cropHint); 438 } 439 final int destWidth = (int)(cropHint.width() * heightR); 440 final Bitmap finalCrop = Bitmap.createScaledBitmap(cropped, 441 destWidth, wallpaper.height, true); 442 if (DEBUG) { 443 Slog.v(TAG, "Final extract:"); 444 Slog.v(TAG, " dims: w=" + wallpaper.width 445 + " h=" + wallpaper.height); 446 Slog.v(TAG, " out: w=" + finalCrop.getWidth() 447 + " h=" + finalCrop.getHeight()); 448 } 449 450 f = new FileOutputStream(wallpaper.cropFile); 451 bos = new BufferedOutputStream(f, 32*1024); 452 finalCrop.compress(Bitmap.CompressFormat.JPEG, 100, bos); 453 bos.flush(); // don't rely on the implicit flush-at-close when noting success 454 success = true; 455 } 456 } catch (Exception e) { 457 if (DEBUG) { 458 Slog.e(TAG, "Error decoding crop", e); 459 } 460 } finally { 461 IoUtils.closeQuietly(bos); 462 IoUtils.closeQuietly(f); 463 } 464 } 465 } 466 467 if (!success) { 468 Slog.e(TAG, "Unable to apply new wallpaper"); 469 wallpaper.cropFile.delete(); 470 } 471 472 if (wallpaper.cropFile.exists()) { 473 boolean didRestorecon = SELinux.restorecon(wallpaper.cropFile.getAbsoluteFile()); 474 if (DEBUG) { 475 Slog.v(TAG, "restorecon() of crop file returned " + didRestorecon); 476 } 477 } 478 } 479 480 final Context mContext; 481 final IWindowManager mIWindowManager; 482 final IPackageManager mIPackageManager; 483 final MyPackageMonitor mMonitor; 484 final AppOpsManager mAppOpsManager; 485 WallpaperData mLastWallpaper; 486 IWallpaperManagerCallback mKeyguardListener; 487 boolean mWaitingForUnlock; 488 boolean mShuttingDown; 489 490 /** 491 * ID of the current wallpaper, changed every time anything sets a wallpaper. 492 * This is used for external detection of wallpaper update activity. 493 */ 494 int mWallpaperId; 495 496 /** 497 * Name of the component used to display bitmap wallpapers from either the gallery or 498 * built-in wallpapers. 499 */ 500 final ComponentName mImageWallpaper; 501 502 /** 503 * Name of the default wallpaper component; might be different from mImageWallpaper 504 */ 505 final ComponentName mDefaultWallpaperComponent; 506 507 final SparseArray<WallpaperData> mWallpaperMap = new SparseArray<WallpaperData>(); 508 final SparseArray<WallpaperData> mLockWallpaperMap = new SparseArray<WallpaperData>(); 509 510 final SparseArray<Boolean> mUserRestorecon = new SparseArray<Boolean>(); 511 int mCurrentUserId; 512 513 static class WallpaperData { 514 515 int userId; 516 517 final File wallpaperFile; // source image 518 final File cropFile; // eventual destination 519 520 /** 521 * True while the client is writing a new wallpaper 522 */ 523 boolean imageWallpaperPending; 524 525 /** 526 * Which new wallpapers are being written; mirrors the 'which' 527 * selector bit field to setWallpaper(). 528 */ 529 int whichPending; 530 531 /** 532 * Callback once the set + crop is finished 533 */ 534 IWallpaperManagerCallback setComplete; 535 536 /** 537 * Is the OS allowed to back up this wallpaper imagery? 538 */ 539 boolean allowBackup; 540 541 /** 542 * Resource name if using a picture from the wallpaper gallery 543 */ 544 String name = ""; 545 546 /** 547 * The component name of the currently set live wallpaper. 548 */ 549 ComponentName wallpaperComponent; 550 551 /** 552 * The component name of the wallpaper that should be set next. 553 */ 554 ComponentName nextWallpaperComponent; 555 556 /** 557 * The ID of this wallpaper 558 */ 559 int wallpaperId; 560 561 WallpaperConnection connection; 562 long lastDiedTime; 563 boolean wallpaperUpdating; 564 WallpaperObserver wallpaperObserver; 565 566 /** 567 * List of callbacks registered they should each be notified when the wallpaper is changed. 568 */ 569 private RemoteCallbackList<IWallpaperManagerCallback> callbacks 570 = new RemoteCallbackList<IWallpaperManagerCallback>(); 571 572 int width = -1; 573 int height = -1; 574 575 /** 576 * The crop hint supplied for displaying a subset of the source image 577 */ 578 final Rect cropHint = new Rect(0, 0, 0, 0); 579 580 final Rect padding = new Rect(0, 0, 0, 0); 581 582 WallpaperData(int userId, String inputFileName, String cropFileName) { 583 this.userId = userId; 584 final File wallpaperDir = getWallpaperDir(userId); 585 wallpaperFile = new File(wallpaperDir, inputFileName); 586 cropFile = new File(wallpaperDir, cropFileName); 587 } 588 589 // Called during initialization of a given user's wallpaper bookkeeping 590 boolean cropExists() { 591 return cropFile.exists(); 592 } 593 594 boolean sourceExists() { 595 return wallpaperFile.exists(); 596 } 597 } 598 599 int makeWallpaperIdLocked() { 600 do { 601 ++mWallpaperId; 602 } while (mWallpaperId == 0); 603 return mWallpaperId; 604 } 605 606 class WallpaperConnection extends IWallpaperConnection.Stub 607 implements ServiceConnection { 608 609 /** Time in milliseconds until we expect the wallpaper to reconnect (unless we're in the 610 * middle of an update). If exceeded, the wallpaper gets reset to the system default. */ 611 private static final long WALLPAPER_RECONNECT_TIMEOUT_MS = 10000; 612 613 final WallpaperInfo mInfo; 614 final Binder mToken = new Binder(); 615 IWallpaperService mService; 616 IWallpaperEngine mEngine; 617 WallpaperData mWallpaper; 618 IRemoteCallback mReply; 619 620 boolean mDimensionsChanged = false; 621 boolean mPaddingChanged = false; 622 623 private Runnable mResetRunnable = () -> { 624 synchronized (mLock) { 625 if (mShuttingDown) { 626 // Don't expect wallpaper services to relaunch during shutdown 627 if (DEBUG_LIVE) { 628 Slog.i(TAG, "Ignoring relaunch timeout during shutdown"); 629 } 630 return; 631 } 632 633 if (!mWallpaper.wallpaperUpdating 634 && mWallpaper.userId == mCurrentUserId) { 635 Slog.w(TAG, "Wallpaper reconnect timed out for " + mWallpaper.wallpaperComponent 636 + ", reverting to built-in wallpaper!"); 637 clearWallpaperLocked(true, FLAG_SYSTEM, mWallpaper.userId, 638 null); 639 } 640 } 641 }; 642 643 public WallpaperConnection(WallpaperInfo info, WallpaperData wallpaper) { 644 mInfo = info; 645 mWallpaper = wallpaper; 646 } 647 648 @Override 649 public void onServiceConnected(ComponentName name, IBinder service) { 650 synchronized (mLock) { 651 if (mWallpaper.connection == this) { 652 mService = IWallpaperService.Stub.asInterface(service); 653 attachServiceLocked(this, mWallpaper); 654 // XXX should probably do saveSettingsLocked() later 655 // when we have an engine, but I'm not sure about 656 // locking there and anyway we always need to be able to 657 // recover if there is something wrong. 658 saveSettingsLocked(mWallpaper.userId); 659 FgThread.getHandler().removeCallbacks(mResetRunnable); 660 } 661 } 662 } 663 664 @Override 665 public void onServiceDisconnected(ComponentName name) { 666 synchronized (mLock) { 667 Slog.w(TAG, "Wallpaper service gone: " + name); 668 if (!Objects.equals(name, mWallpaper.wallpaperComponent)) { 669 Slog.e(TAG, "Does not match expected wallpaper component " 670 + mWallpaper.wallpaperComponent); 671 } 672 mService = null; 673 mEngine = null; 674 if (mWallpaper.connection == this) { 675 // There is an inherent ordering race between this callback and the 676 // package monitor that receives notice that a package is being updated, 677 // so we cannot quite trust at this moment that we know for sure that 678 // this is not an update. If we think this is a genuine non-update 679 // wallpaper outage, we do our "wait for reset" work as a continuation, 680 // a short time in the future, specifically to allow any pending package 681 // update message on this same looper thread to be processed. 682 if (!mWallpaper.wallpaperUpdating) { 683 mContext.getMainThreadHandler().postDelayed(() -> processDisconnect(this), 684 1000); 685 } 686 } 687 } 688 } 689 690 private void processDisconnect(final ServiceConnection connection) { 691 synchronized (mLock) { 692 // The wallpaper disappeared. If this isn't a system-default one, track 693 // crashes and fall back to default if it continues to misbehave. 694 if (connection == mWallpaper.connection) { 695 final ComponentName wpService = mWallpaper.wallpaperComponent; 696 if (!mWallpaper.wallpaperUpdating 697 && mWallpaper.userId == mCurrentUserId 698 && !Objects.equals(mDefaultWallpaperComponent, wpService) 699 && !Objects.equals(mImageWallpaper, wpService)) { 700 // There is a race condition which causes 701 // {@link #mWallpaper.wallpaperUpdating} to be false even if it is 702 // currently updating since the broadcast notifying us is async. 703 // This race is overcome by the general rule that we only reset the 704 // wallpaper if its service was shut down twice 705 // during {@link #MIN_WALLPAPER_CRASH_TIME} millis. 706 if (mWallpaper.lastDiedTime != 0 707 && mWallpaper.lastDiedTime + MIN_WALLPAPER_CRASH_TIME 708 > SystemClock.uptimeMillis()) { 709 Slog.w(TAG, "Reverting to built-in wallpaper!"); 710 clearWallpaperLocked(true, FLAG_SYSTEM, mWallpaper.userId, null); 711 } else { 712 mWallpaper.lastDiedTime = SystemClock.uptimeMillis(); 713 714 // If we didn't reset it right away, do so after we couldn't connect to 715 // it for an extended amount of time to avoid having a black wallpaper. 716 final Handler fgHandler = FgThread.getHandler(); 717 fgHandler.removeCallbacks(mResetRunnable); 718 fgHandler.postDelayed(mResetRunnable, WALLPAPER_RECONNECT_TIMEOUT_MS); 719 if (DEBUG_LIVE) { 720 Slog.i(TAG, "Started wallpaper reconnect timeout for " + wpService); 721 } 722 } 723 final String flattened = wpService.flattenToString(); 724 EventLog.writeEvent(EventLogTags.WP_WALLPAPER_CRASHED, 725 flattened.substring(0, Math.min(flattened.length(), 726 MAX_WALLPAPER_COMPONENT_LOG_LENGTH))); 727 } 728 } else { 729 if (DEBUG_LIVE) { 730 Slog.i(TAG, "Wallpaper changed during disconnect tracking; ignoring"); 731 } 732 } 733 } 734 } 735 736 @Override 737 public void attachEngine(IWallpaperEngine engine) { 738 synchronized (mLock) { 739 mEngine = engine; 740 if (mDimensionsChanged) { 741 try { 742 mEngine.setDesiredSize(mWallpaper.width, mWallpaper.height); 743 } catch (RemoteException e) { 744 Slog.w(TAG, "Failed to set wallpaper dimensions", e); 745 } 746 mDimensionsChanged = false; 747 } 748 if (mPaddingChanged) { 749 try { 750 mEngine.setDisplayPadding(mWallpaper.padding); 751 } catch (RemoteException e) { 752 Slog.w(TAG, "Failed to set wallpaper padding", e); 753 } 754 mPaddingChanged = false; 755 } 756 } 757 } 758 759 @Override 760 public void engineShown(IWallpaperEngine engine) { 761 synchronized (mLock) { 762 if (mReply != null) { 763 long ident = Binder.clearCallingIdentity(); 764 try { 765 mReply.sendResult(null); 766 } catch (RemoteException e) { 767 Binder.restoreCallingIdentity(ident); 768 } 769 mReply = null; 770 } 771 } 772 } 773 774 @Override 775 public ParcelFileDescriptor setWallpaper(String name) { 776 synchronized (mLock) { 777 if (mWallpaper.connection == this) { 778 return updateWallpaperBitmapLocked(name, mWallpaper, null); 779 } 780 return null; 781 } 782 } 783 } 784 785 class MyPackageMonitor extends PackageMonitor { 786 @Override 787 public void onPackageUpdateFinished(String packageName, int uid) { 788 synchronized (mLock) { 789 if (mCurrentUserId != getChangingUserId()) { 790 return; 791 } 792 WallpaperData wallpaper = mWallpaperMap.get(mCurrentUserId); 793 if (wallpaper != null) { 794 final ComponentName wpService = wallpaper.wallpaperComponent; 795 if (wpService != null && wpService.getPackageName().equals(packageName)) { 796 if (DEBUG_LIVE) { 797 Slog.i(TAG, "Wallpaper " + wpService + " update has finished"); 798 } 799 wallpaper.wallpaperUpdating = false; 800 clearWallpaperComponentLocked(wallpaper); 801 if (!bindWallpaperComponentLocked(wpService, false, false, 802 wallpaper, null)) { 803 Slog.w(TAG, "Wallpaper " + wpService 804 + " no longer available; reverting to default"); 805 clearWallpaperLocked(false, FLAG_SYSTEM, wallpaper.userId, null); 806 } 807 } 808 } 809 } 810 } 811 812 @Override 813 public void onPackageModified(String packageName) { 814 synchronized (mLock) { 815 if (mCurrentUserId != getChangingUserId()) { 816 return; 817 } 818 WallpaperData wallpaper = mWallpaperMap.get(mCurrentUserId); 819 if (wallpaper != null) { 820 if (wallpaper.wallpaperComponent == null 821 || !wallpaper.wallpaperComponent.getPackageName().equals(packageName)) { 822 return; 823 } 824 doPackagesChangedLocked(true, wallpaper); 825 } 826 } 827 } 828 829 @Override 830 public void onPackageUpdateStarted(String packageName, int uid) { 831 synchronized (mLock) { 832 if (mCurrentUserId != getChangingUserId()) { 833 return; 834 } 835 WallpaperData wallpaper = mWallpaperMap.get(mCurrentUserId); 836 if (wallpaper != null) { 837 if (wallpaper.wallpaperComponent != null 838 && wallpaper.wallpaperComponent.getPackageName().equals(packageName)) { 839 if (DEBUG_LIVE) { 840 Slog.i(TAG, "Wallpaper service " + wallpaper.wallpaperComponent 841 + " is updating"); 842 } 843 wallpaper.wallpaperUpdating = true; 844 if (wallpaper.connection != null) { 845 FgThread.getHandler().removeCallbacks( 846 wallpaper.connection.mResetRunnable); 847 } 848 } 849 } 850 } 851 } 852 853 @Override 854 public boolean onHandleForceStop(Intent intent, String[] packages, int uid, boolean doit) { 855 synchronized (mLock) { 856 boolean changed = false; 857 if (mCurrentUserId != getChangingUserId()) { 858 return false; 859 } 860 WallpaperData wallpaper = mWallpaperMap.get(mCurrentUserId); 861 if (wallpaper != null) { 862 boolean res = doPackagesChangedLocked(doit, wallpaper); 863 changed |= res; 864 } 865 return changed; 866 } 867 } 868 869 @Override 870 public void onSomePackagesChanged() { 871 synchronized (mLock) { 872 if (mCurrentUserId != getChangingUserId()) { 873 return; 874 } 875 WallpaperData wallpaper = mWallpaperMap.get(mCurrentUserId); 876 if (wallpaper != null) { 877 doPackagesChangedLocked(true, wallpaper); 878 } 879 } 880 } 881 882 boolean doPackagesChangedLocked(boolean doit, WallpaperData wallpaper) { 883 boolean changed = false; 884 if (wallpaper.wallpaperComponent != null) { 885 int change = isPackageDisappearing(wallpaper.wallpaperComponent 886 .getPackageName()); 887 if (change == PACKAGE_PERMANENT_CHANGE 888 || change == PACKAGE_TEMPORARY_CHANGE) { 889 changed = true; 890 if (doit) { 891 Slog.w(TAG, "Wallpaper uninstalled, removing: " 892 + wallpaper.wallpaperComponent); 893 clearWallpaperLocked(false, FLAG_SYSTEM, wallpaper.userId, null); 894 } 895 } 896 } 897 if (wallpaper.nextWallpaperComponent != null) { 898 int change = isPackageDisappearing(wallpaper.nextWallpaperComponent 899 .getPackageName()); 900 if (change == PACKAGE_PERMANENT_CHANGE 901 || change == PACKAGE_TEMPORARY_CHANGE) { 902 wallpaper.nextWallpaperComponent = null; 903 } 904 } 905 if (wallpaper.wallpaperComponent != null 906 && isPackageModified(wallpaper.wallpaperComponent.getPackageName())) { 907 try { 908 mContext.getPackageManager().getServiceInfo(wallpaper.wallpaperComponent, 909 PackageManager.MATCH_DIRECT_BOOT_AWARE 910 | PackageManager.MATCH_DIRECT_BOOT_UNAWARE); 911 } catch (NameNotFoundException e) { 912 Slog.w(TAG, "Wallpaper component gone, removing: " 913 + wallpaper.wallpaperComponent); 914 clearWallpaperLocked(false, FLAG_SYSTEM, wallpaper.userId, null); 915 } 916 } 917 if (wallpaper.nextWallpaperComponent != null 918 && isPackageModified(wallpaper.nextWallpaperComponent.getPackageName())) { 919 try { 920 mContext.getPackageManager().getServiceInfo(wallpaper.nextWallpaperComponent, 921 PackageManager.MATCH_DIRECT_BOOT_AWARE 922 | PackageManager.MATCH_DIRECT_BOOT_UNAWARE); 923 } catch (NameNotFoundException e) { 924 wallpaper.nextWallpaperComponent = null; 925 } 926 } 927 return changed; 928 } 929 } 930 931 public WallpaperManagerService(Context context) { 932 if (DEBUG) Slog.v(TAG, "WallpaperService startup"); 933 mContext = context; 934 mShuttingDown = false; 935 mImageWallpaper = ComponentName.unflattenFromString( 936 context.getResources().getString(R.string.image_wallpaper_component)); 937 mDefaultWallpaperComponent = WallpaperManager.getDefaultWallpaperComponent(context); 938 mIWindowManager = IWindowManager.Stub.asInterface( 939 ServiceManager.getService(Context.WINDOW_SERVICE)); 940 mIPackageManager = AppGlobals.getPackageManager(); 941 mAppOpsManager = (AppOpsManager) mContext.getSystemService(Context.APP_OPS_SERVICE); 942 mMonitor = new MyPackageMonitor(); 943 mMonitor.register(context, null, UserHandle.ALL, true); 944 getWallpaperDir(UserHandle.USER_SYSTEM).mkdirs(); 945 loadSettingsLocked(UserHandle.USER_SYSTEM, false); 946 } 947 948 private static File getWallpaperDir(int userId) { 949 return Environment.getUserSystemDirectory(userId); 950 } 951 952 @Override 953 protected void finalize() throws Throwable { 954 super.finalize(); 955 for (int i = 0; i < mWallpaperMap.size(); i++) { 956 WallpaperData wallpaper = mWallpaperMap.valueAt(i); 957 wallpaper.wallpaperObserver.stopWatching(); 958 } 959 } 960 961 void systemReady() { 962 if (DEBUG) Slog.v(TAG, "systemReady"); 963 WallpaperData wallpaper = mWallpaperMap.get(UserHandle.USER_SYSTEM); 964 // If we think we're going to be using the system image wallpaper imagery, make 965 // sure we have something to render 966 if (mImageWallpaper.equals(wallpaper.nextWallpaperComponent)) { 967 // No crop file? Make sure we've finished the processing sequence if necessary 968 if (!wallpaper.cropExists()) { 969 if (DEBUG) { 970 Slog.i(TAG, "No crop; regenerating from source"); 971 } 972 generateCrop(wallpaper); 973 } 974 // Still nothing? Fall back to default. 975 if (!wallpaper.cropExists()) { 976 if (DEBUG) { 977 Slog.i(TAG, "Unable to regenerate crop; resetting"); 978 } 979 clearWallpaperLocked(false, FLAG_SYSTEM, UserHandle.USER_SYSTEM, null); 980 } 981 } else { 982 if (DEBUG) { 983 Slog.i(TAG, "Nondefault wallpaper component; gracefully ignoring"); 984 } 985 } 986 987 IntentFilter userFilter = new IntentFilter(); 988 userFilter.addAction(Intent.ACTION_USER_REMOVED); 989 mContext.registerReceiver(new BroadcastReceiver() { 990 @Override 991 public void onReceive(Context context, Intent intent) { 992 final String action = intent.getAction(); 993 if (Intent.ACTION_USER_REMOVED.equals(action)) { 994 onRemoveUser(intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 995 UserHandle.USER_NULL)); 996 } 997 } 998 }, userFilter); 999 1000 final IntentFilter shutdownFilter = new IntentFilter(Intent.ACTION_SHUTDOWN); 1001 mContext.registerReceiver(new BroadcastReceiver() { 1002 @Override 1003 public void onReceive(Context context, Intent intent) { 1004 if (Intent.ACTION_SHUTDOWN.equals(intent.getAction())) { 1005 if (DEBUG) { 1006 Slog.i(TAG, "Shutting down"); 1007 } 1008 synchronized (mLock) { 1009 mShuttingDown = true; 1010 } 1011 } 1012 } 1013 }, shutdownFilter); 1014 1015 try { 1016 ActivityManager.getService().registerUserSwitchObserver( 1017 new UserSwitchObserver() { 1018 @Override 1019 public void onUserSwitching(int newUserId, IRemoteCallback reply) { 1020 switchUser(newUserId, reply); 1021 } 1022 }, TAG); 1023 } catch (RemoteException e) { 1024 e.rethrowAsRuntimeException(); 1025 } 1026 } 1027 1028 /** Called by SystemBackupAgent */ 1029 public String getName() { 1030 // Verify caller is the system 1031 if (Binder.getCallingUid() != android.os.Process.SYSTEM_UID) { 1032 throw new RuntimeException("getName() can only be called from the system process"); 1033 } 1034 synchronized (mLock) { 1035 return mWallpaperMap.get(0).name; 1036 } 1037 } 1038 1039 void stopObserver(WallpaperData wallpaper) { 1040 if (wallpaper != null) { 1041 if (wallpaper.wallpaperObserver != null) { 1042 wallpaper.wallpaperObserver.stopWatching(); 1043 wallpaper.wallpaperObserver = null; 1044 } 1045 } 1046 } 1047 1048 void stopObserversLocked(int userId) { 1049 stopObserver(mWallpaperMap.get(userId)); 1050 stopObserver(mLockWallpaperMap.get(userId)); 1051 mWallpaperMap.remove(userId); 1052 mLockWallpaperMap.remove(userId); 1053 } 1054 1055 void onUnlockUser(final int userId) { 1056 synchronized (mLock) { 1057 if (mCurrentUserId == userId) { 1058 if (mWaitingForUnlock) { 1059 // If we're switching users, now is when we transition the wallpaper 1060 switchUser(userId, null); 1061 } 1062 1063 // Make sure that the SELinux labeling of all the relevant files is correct. 1064 // This corrects for mislabeling bugs that might have arisen from move-to 1065 // operations involving the wallpaper files. This isn't timing-critical, 1066 // so we do it in the background to avoid holding up the user unlock operation. 1067 if (mUserRestorecon.get(userId) != Boolean.TRUE) { 1068 mUserRestorecon.put(userId, Boolean.TRUE); 1069 Runnable relabeler = new Runnable() { 1070 @Override 1071 public void run() { 1072 final File wallpaperDir = getWallpaperDir(userId); 1073 for (String filename : sPerUserFiles) { 1074 File f = new File(wallpaperDir, filename); 1075 if (f.exists()) { 1076 SELinux.restorecon(f); 1077 } 1078 } 1079 } 1080 }; 1081 BackgroundThread.getHandler().post(relabeler); 1082 } 1083 } 1084 } 1085 } 1086 1087 void onRemoveUser(int userId) { 1088 if (userId < 1) return; 1089 1090 final File wallpaperDir = getWallpaperDir(userId); 1091 synchronized (mLock) { 1092 stopObserversLocked(userId); 1093 for (String filename : sPerUserFiles) { 1094 new File(wallpaperDir, filename).delete(); 1095 } 1096 mUserRestorecon.remove(userId); 1097 } 1098 } 1099 1100 void switchUser(int userId, IRemoteCallback reply) { 1101 synchronized (mLock) { 1102 mCurrentUserId = userId; 1103 WallpaperData wallpaper = getWallpaperSafeLocked(userId, FLAG_SYSTEM); 1104 // Not started watching yet, in case wallpaper data was loaded for other reasons. 1105 if (wallpaper.wallpaperObserver == null) { 1106 wallpaper.wallpaperObserver = new WallpaperObserver(wallpaper); 1107 wallpaper.wallpaperObserver.startWatching(); 1108 } 1109 switchWallpaper(wallpaper, reply); 1110 } 1111 } 1112 1113 void switchWallpaper(WallpaperData wallpaper, IRemoteCallback reply) { 1114 synchronized (mLock) { 1115 mWaitingForUnlock = false; 1116 final ComponentName cname = wallpaper.wallpaperComponent != null ? 1117 wallpaper.wallpaperComponent : wallpaper.nextWallpaperComponent; 1118 if (!bindWallpaperComponentLocked(cname, true, false, wallpaper, reply)) { 1119 // We failed to bind the desired wallpaper, but that might 1120 // happen if the wallpaper isn't direct-boot aware 1121 ServiceInfo si = null; 1122 try { 1123 si = mIPackageManager.getServiceInfo(cname, 1124 PackageManager.MATCH_DIRECT_BOOT_UNAWARE, wallpaper.userId); 1125 } catch (RemoteException ignored) { 1126 } 1127 1128 if (si == null) { 1129 Slog.w(TAG, "Failure starting previous wallpaper; clearing"); 1130 clearWallpaperLocked(false, FLAG_SYSTEM, wallpaper.userId, reply); 1131 } else { 1132 Slog.w(TAG, "Wallpaper isn't direct boot aware; using fallback until unlocked"); 1133 // We might end up persisting the current wallpaper data 1134 // while locked, so pretend like the component was actually 1135 // bound into place 1136 wallpaper.wallpaperComponent = wallpaper.nextWallpaperComponent; 1137 final WallpaperData fallback = new WallpaperData(wallpaper.userId, 1138 WALLPAPER_LOCK_ORIG, WALLPAPER_LOCK_CROP); 1139 ensureSaneWallpaperData(fallback); 1140 bindWallpaperComponentLocked(mImageWallpaper, true, false, fallback, reply); 1141 mWaitingForUnlock = true; 1142 } 1143 } 1144 } 1145 } 1146 1147 @Override 1148 public void clearWallpaper(String callingPackage, int which, int userId) { 1149 if (DEBUG) Slog.v(TAG, "clearWallpaper"); 1150 checkPermission(android.Manifest.permission.SET_WALLPAPER); 1151 if (!isWallpaperSupported(callingPackage) || !isSetWallpaperAllowed(callingPackage)) { 1152 return; 1153 } 1154 userId = ActivityManager.handleIncomingUser(Binder.getCallingPid(), 1155 Binder.getCallingUid(), userId, false, true, "clearWallpaper", null); 1156 1157 synchronized (mLock) { 1158 clearWallpaperLocked(false, which, userId, null); 1159 } 1160 } 1161 1162 void clearWallpaperLocked(boolean defaultFailed, int which, int userId, IRemoteCallback reply) { 1163 if (which != FLAG_SYSTEM && which != FLAG_LOCK) { 1164 throw new IllegalArgumentException("Must specify exactly one kind of wallpaper to read"); 1165 } 1166 1167 WallpaperData wallpaper = null; 1168 if (which == FLAG_LOCK) { 1169 wallpaper = mLockWallpaperMap.get(userId); 1170 if (wallpaper == null) { 1171 // It's already gone; we're done. 1172 if (DEBUG) { 1173 Slog.i(TAG, "Lock wallpaper already cleared"); 1174 } 1175 return; 1176 } 1177 } else { 1178 wallpaper = mWallpaperMap.get(userId); 1179 if (wallpaper == null) { 1180 // Might need to bring it in the first time to establish our rewrite 1181 loadSettingsLocked(userId, false); 1182 wallpaper = mWallpaperMap.get(userId); 1183 } 1184 } 1185 if (wallpaper == null) { 1186 return; 1187 } 1188 1189 final long ident = Binder.clearCallingIdentity(); 1190 try { 1191 if (wallpaper.wallpaperFile.exists()) { 1192 wallpaper.wallpaperFile.delete(); 1193 wallpaper.cropFile.delete(); 1194 if (which == FLAG_LOCK) { 1195 mLockWallpaperMap.remove(userId); 1196 final IWallpaperManagerCallback cb = mKeyguardListener; 1197 if (cb != null) { 1198 if (DEBUG) { 1199 Slog.i(TAG, "Notifying keyguard of lock wallpaper clear"); 1200 } 1201 try { 1202 cb.onWallpaperChanged(); 1203 } catch (RemoteException e) { 1204 // Oh well it went away; no big deal 1205 } 1206 } 1207 saveSettingsLocked(userId); 1208 return; 1209 } 1210 } 1211 1212 RuntimeException e = null; 1213 try { 1214 wallpaper.imageWallpaperPending = false; 1215 if (userId != mCurrentUserId) return; 1216 if (bindWallpaperComponentLocked(defaultFailed 1217 ? mImageWallpaper 1218 : null, true, false, wallpaper, reply)) { 1219 return; 1220 } 1221 } catch (IllegalArgumentException e1) { 1222 e = e1; 1223 } 1224 1225 // This can happen if the default wallpaper component doesn't 1226 // exist. This should be a system configuration problem, but 1227 // let's not let it crash the system and just live with no 1228 // wallpaper. 1229 Slog.e(TAG, "Default wallpaper component not found!", e); 1230 clearWallpaperComponentLocked(wallpaper); 1231 if (reply != null) { 1232 try { 1233 reply.sendResult(null); 1234 } catch (RemoteException e1) { 1235 } 1236 } 1237 } finally { 1238 Binder.restoreCallingIdentity(ident); 1239 } 1240 } 1241 1242 public boolean hasNamedWallpaper(String name) { 1243 synchronized (mLock) { 1244 List<UserInfo> users; 1245 long ident = Binder.clearCallingIdentity(); 1246 try { 1247 users = ((UserManager) mContext.getSystemService(Context.USER_SERVICE)).getUsers(); 1248 } finally { 1249 Binder.restoreCallingIdentity(ident); 1250 } 1251 for (UserInfo user: users) { 1252 // ignore managed profiles 1253 if (user.isManagedProfile()) { 1254 continue; 1255 } 1256 WallpaperData wd = mWallpaperMap.get(user.id); 1257 if (wd == null) { 1258 // User hasn't started yet, so load her settings to peek at the wallpaper 1259 loadSettingsLocked(user.id, false); 1260 wd = mWallpaperMap.get(user.id); 1261 } 1262 if (wd != null && name.equals(wd.name)) { 1263 return true; 1264 } 1265 } 1266 } 1267 return false; 1268 } 1269 1270 private Point getDefaultDisplaySize() { 1271 Point p = new Point(); 1272 WindowManager wm = (WindowManager)mContext.getSystemService(Context.WINDOW_SERVICE); 1273 Display d = wm.getDefaultDisplay(); 1274 d.getRealSize(p); 1275 return p; 1276 } 1277 1278 public void setDimensionHints(int width, int height, String callingPackage) 1279 throws RemoteException { 1280 checkPermission(android.Manifest.permission.SET_WALLPAPER_HINTS); 1281 if (!isWallpaperSupported(callingPackage)) { 1282 return; 1283 } 1284 synchronized (mLock) { 1285 int userId = UserHandle.getCallingUserId(); 1286 WallpaperData wallpaper = getWallpaperSafeLocked(userId, FLAG_SYSTEM); 1287 if (width <= 0 || height <= 0) { 1288 throw new IllegalArgumentException("width and height must be > 0"); 1289 } 1290 // Make sure it is at least as large as the display. 1291 Point displaySize = getDefaultDisplaySize(); 1292 width = Math.max(width, displaySize.x); 1293 height = Math.max(height, displaySize.y); 1294 1295 if (width != wallpaper.width || height != wallpaper.height) { 1296 wallpaper.width = width; 1297 wallpaper.height = height; 1298 saveSettingsLocked(userId); 1299 if (mCurrentUserId != userId) return; // Don't change the properties now 1300 if (wallpaper.connection != null) { 1301 if (wallpaper.connection.mEngine != null) { 1302 try { 1303 wallpaper.connection.mEngine.setDesiredSize( 1304 width, height); 1305 } catch (RemoteException e) { 1306 } 1307 notifyCallbacksLocked(wallpaper); 1308 } else if (wallpaper.connection.mService != null) { 1309 // We've attached to the service but the engine hasn't attached back to us 1310 // yet. This means it will be created with the previous dimensions, so we 1311 // need to update it to the new dimensions once it attaches. 1312 wallpaper.connection.mDimensionsChanged = true; 1313 } 1314 } 1315 } 1316 } 1317 } 1318 1319 public int getWidthHint() throws RemoteException { 1320 synchronized (mLock) { 1321 WallpaperData wallpaper = mWallpaperMap.get(UserHandle.getCallingUserId()); 1322 if (wallpaper != null) { 1323 return wallpaper.width; 1324 } else { 1325 return 0; 1326 } 1327 } 1328 } 1329 1330 public int getHeightHint() throws RemoteException { 1331 synchronized (mLock) { 1332 WallpaperData wallpaper = mWallpaperMap.get(UserHandle.getCallingUserId()); 1333 if (wallpaper != null) { 1334 return wallpaper.height; 1335 } else { 1336 return 0; 1337 } 1338 } 1339 } 1340 1341 public void setDisplayPadding(Rect padding, String callingPackage) { 1342 checkPermission(android.Manifest.permission.SET_WALLPAPER_HINTS); 1343 if (!isWallpaperSupported(callingPackage)) { 1344 return; 1345 } 1346 synchronized (mLock) { 1347 int userId = UserHandle.getCallingUserId(); 1348 WallpaperData wallpaper = getWallpaperSafeLocked(userId, FLAG_SYSTEM); 1349 if (padding.left < 0 || padding.top < 0 || padding.right < 0 || padding.bottom < 0) { 1350 throw new IllegalArgumentException("padding must be positive: " + padding); 1351 } 1352 1353 if (!padding.equals(wallpaper.padding)) { 1354 wallpaper.padding.set(padding); 1355 saveSettingsLocked(userId); 1356 if (mCurrentUserId != userId) return; // Don't change the properties now 1357 if (wallpaper.connection != null) { 1358 if (wallpaper.connection.mEngine != null) { 1359 try { 1360 wallpaper.connection.mEngine.setDisplayPadding(padding); 1361 } catch (RemoteException e) { 1362 } 1363 notifyCallbacksLocked(wallpaper); 1364 } else if (wallpaper.connection.mService != null) { 1365 // We've attached to the service but the engine hasn't attached back to us 1366 // yet. This means it will be created with the previous dimensions, so we 1367 // need to update it to the new dimensions once it attaches. 1368 wallpaper.connection.mPaddingChanged = true; 1369 } 1370 } 1371 } 1372 } 1373 } 1374 1375 @Override 1376 public ParcelFileDescriptor getWallpaper(IWallpaperManagerCallback cb, final int which, 1377 Bundle outParams, int wallpaperUserId) { 1378 wallpaperUserId = ActivityManager.handleIncomingUser(Binder.getCallingPid(), 1379 Binder.getCallingUid(), wallpaperUserId, false, true, "getWallpaper", null); 1380 1381 if (which != FLAG_SYSTEM && which != FLAG_LOCK) { 1382 throw new IllegalArgumentException("Must specify exactly one kind of wallpaper to read"); 1383 } 1384 1385 synchronized (mLock) { 1386 final SparseArray<WallpaperData> whichSet = 1387 (which == FLAG_LOCK) ? mLockWallpaperMap : mWallpaperMap; 1388 WallpaperData wallpaper = whichSet.get(wallpaperUserId); 1389 if (wallpaper == null) { 1390 // common case, this is the first lookup post-boot of the system or 1391 // unified lock, so we bring up the saved state lazily now and recheck. 1392 loadSettingsLocked(wallpaperUserId, false); 1393 wallpaper = whichSet.get(wallpaperUserId); 1394 if (wallpaper == null) { 1395 return null; 1396 } 1397 } 1398 try { 1399 if (outParams != null) { 1400 outParams.putInt("width", wallpaper.width); 1401 outParams.putInt("height", wallpaper.height); 1402 } 1403 if (cb != null) { 1404 wallpaper.callbacks.register(cb); 1405 } 1406 if (!wallpaper.cropFile.exists()) { 1407 return null; 1408 } 1409 return ParcelFileDescriptor.open(wallpaper.cropFile, MODE_READ_ONLY); 1410 } catch (FileNotFoundException e) { 1411 /* Shouldn't happen as we check to see if the file exists */ 1412 Slog.w(TAG, "Error getting wallpaper", e); 1413 } 1414 return null; 1415 } 1416 } 1417 1418 @Override 1419 public WallpaperInfo getWallpaperInfo(int userId) { 1420 userId = ActivityManager.handleIncomingUser(Binder.getCallingPid(), 1421 Binder.getCallingUid(), userId, false, true, "getWallpaperIdForUser", null); 1422 synchronized (mLock) { 1423 WallpaperData wallpaper = mWallpaperMap.get(userId); 1424 if (wallpaper != null && wallpaper.connection != null) { 1425 return wallpaper.connection.mInfo; 1426 } 1427 return null; 1428 } 1429 } 1430 1431 @Override 1432 public int getWallpaperIdForUser(int which, int userId) { 1433 userId = ActivityManager.handleIncomingUser(Binder.getCallingPid(), 1434 Binder.getCallingUid(), userId, false, true, "getWallpaperIdForUser", null); 1435 1436 if (which != FLAG_SYSTEM && which != FLAG_LOCK) { 1437 throw new IllegalArgumentException("Must specify exactly one kind of wallpaper"); 1438 } 1439 1440 final SparseArray<WallpaperData> map = 1441 (which == FLAG_LOCK) ? mLockWallpaperMap : mWallpaperMap; 1442 synchronized (mLock) { 1443 WallpaperData wallpaper = map.get(userId); 1444 if (wallpaper != null) { 1445 return wallpaper.wallpaperId; 1446 } 1447 } 1448 return -1; 1449 } 1450 1451 @Override 1452 public boolean setLockWallpaperCallback(IWallpaperManagerCallback cb) { 1453 checkPermission(android.Manifest.permission.INTERNAL_SYSTEM_WINDOW); 1454 synchronized (mLock) { 1455 mKeyguardListener = cb; 1456 } 1457 return true; 1458 } 1459 1460 @Override 1461 public ParcelFileDescriptor setWallpaper(String name, String callingPackage, 1462 Rect cropHint, boolean allowBackup, Bundle extras, int which, 1463 IWallpaperManagerCallback completion, int userId) { 1464 userId = ActivityManager.handleIncomingUser(getCallingPid(), getCallingUid(), userId, 1465 false /* all */, true /* full */, "changing wallpaper", null /* pkg */); 1466 checkPermission(android.Manifest.permission.SET_WALLPAPER); 1467 1468 if ((which & (FLAG_LOCK|FLAG_SYSTEM)) == 0) { 1469 final String msg = "Must specify a valid wallpaper category to set"; 1470 Slog.e(TAG, msg); 1471 throw new IllegalArgumentException(msg); 1472 } 1473 1474 if (!isWallpaperSupported(callingPackage) || !isSetWallpaperAllowed(callingPackage)) { 1475 return null; 1476 } 1477 1478 // "null" means the no-op crop, preserving the full input image 1479 if (cropHint == null) { 1480 cropHint = new Rect(0, 0, 0, 0); 1481 } else { 1482 if (cropHint.isEmpty() 1483 || cropHint.left < 0 1484 || cropHint.top < 0) { 1485 throw new IllegalArgumentException("Invalid crop rect supplied: " + cropHint); 1486 } 1487 } 1488 1489 synchronized (mLock) { 1490 if (DEBUG) Slog.v(TAG, "setWallpaper which=0x" + Integer.toHexString(which)); 1491 WallpaperData wallpaper; 1492 1493 /* If we're setting system but not lock, and lock is currently sharing the system 1494 * wallpaper, we need to migrate that image over to being lock-only before 1495 * the caller here writes new bitmap data. 1496 */ 1497 if (which == FLAG_SYSTEM && mLockWallpaperMap.get(userId) == null) { 1498 if (DEBUG) { 1499 Slog.i(TAG, "Migrating system->lock to preserve"); 1500 } 1501 migrateSystemToLockWallpaperLocked(userId); 1502 } 1503 1504 wallpaper = getWallpaperSafeLocked(userId, which); 1505 final long ident = Binder.clearCallingIdentity(); 1506 try { 1507 ParcelFileDescriptor pfd = updateWallpaperBitmapLocked(name, wallpaper, extras); 1508 if (pfd != null) { 1509 wallpaper.imageWallpaperPending = true; 1510 wallpaper.whichPending = which; 1511 wallpaper.setComplete = completion; 1512 wallpaper.cropHint.set(cropHint); 1513 wallpaper.allowBackup = allowBackup; 1514 } 1515 return pfd; 1516 } finally { 1517 Binder.restoreCallingIdentity(ident); 1518 } 1519 } 1520 } 1521 1522 private void migrateSystemToLockWallpaperLocked(int userId) { 1523 WallpaperData sysWP = mWallpaperMap.get(userId); 1524 if (sysWP == null) { 1525 if (DEBUG) { 1526 Slog.i(TAG, "No system wallpaper? Not tracking for lock-only"); 1527 } 1528 return; 1529 } 1530 1531 // We know a-priori that there is no lock-only wallpaper currently 1532 WallpaperData lockWP = new WallpaperData(userId, 1533 WALLPAPER_LOCK_ORIG, WALLPAPER_LOCK_CROP); 1534 lockWP.wallpaperId = sysWP.wallpaperId; 1535 lockWP.cropHint.set(sysWP.cropHint); 1536 lockWP.width = sysWP.width; 1537 lockWP.height = sysWP.height; 1538 lockWP.allowBackup = sysWP.allowBackup; 1539 1540 // Migrate the bitmap files outright; no need to copy 1541 try { 1542 Os.rename(sysWP.wallpaperFile.getAbsolutePath(), lockWP.wallpaperFile.getAbsolutePath()); 1543 Os.rename(sysWP.cropFile.getAbsolutePath(), lockWP.cropFile.getAbsolutePath()); 1544 } catch (ErrnoException e) { 1545 Slog.e(TAG, "Can't migrate system wallpaper: " + e.getMessage()); 1546 lockWP.wallpaperFile.delete(); 1547 lockWP.cropFile.delete(); 1548 return; 1549 } 1550 1551 mLockWallpaperMap.put(userId, lockWP); 1552 } 1553 1554 ParcelFileDescriptor updateWallpaperBitmapLocked(String name, WallpaperData wallpaper, 1555 Bundle extras) { 1556 if (name == null) name = ""; 1557 try { 1558 File dir = getWallpaperDir(wallpaper.userId); 1559 if (!dir.exists()) { 1560 dir.mkdir(); 1561 FileUtils.setPermissions( 1562 dir.getPath(), 1563 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 1564 -1, -1); 1565 } 1566 ParcelFileDescriptor fd = ParcelFileDescriptor.open(wallpaper.wallpaperFile, 1567 MODE_CREATE|MODE_READ_WRITE|MODE_TRUNCATE); 1568 if (!SELinux.restorecon(wallpaper.wallpaperFile)) { 1569 return null; 1570 } 1571 wallpaper.name = name; 1572 wallpaper.wallpaperId = makeWallpaperIdLocked(); 1573 if (extras != null) { 1574 extras.putInt(WallpaperManager.EXTRA_NEW_WALLPAPER_ID, wallpaper.wallpaperId); 1575 } 1576 if (DEBUG) { 1577 Slog.v(TAG, "updateWallpaperBitmapLocked() : id=" + wallpaper.wallpaperId 1578 + " name=" + name + " file=" + wallpaper.wallpaperFile.getName()); 1579 } 1580 return fd; 1581 } catch (FileNotFoundException e) { 1582 Slog.w(TAG, "Error setting wallpaper", e); 1583 } 1584 return null; 1585 } 1586 1587 @Override 1588 public void setWallpaperComponentChecked(ComponentName name, String callingPackage, 1589 int userId) { 1590 1591 if (isWallpaperSupported(callingPackage) && isSetWallpaperAllowed(callingPackage)) { 1592 setWallpaperComponent(name, userId); 1593 } 1594 } 1595 1596 // ToDo: Remove this version of the function 1597 @Override 1598 public void setWallpaperComponent(ComponentName name) { 1599 setWallpaperComponent(name, UserHandle.getCallingUserId()); 1600 } 1601 1602 private void setWallpaperComponent(ComponentName name, int userId) { 1603 userId = ActivityManager.handleIncomingUser(getCallingPid(), getCallingUid(), userId, 1604 false /* all */, true /* full */, "changing live wallpaper", null /* pkg */); 1605 checkPermission(android.Manifest.permission.SET_WALLPAPER_COMPONENT); 1606 1607 synchronized (mLock) { 1608 if (DEBUG) Slog.v(TAG, "setWallpaperComponent name=" + name); 1609 WallpaperData wallpaper = mWallpaperMap.get(userId); 1610 if (wallpaper == null) { 1611 throw new IllegalStateException("Wallpaper not yet initialized for user " + userId); 1612 } 1613 final long ident = Binder.clearCallingIdentity(); 1614 1615 // Live wallpapers can't be specified for keyguard. If we're using a static 1616 // system+lock image currently, migrate the system wallpaper to be a lock-only 1617 // image as part of making a different live component active as the system 1618 // wallpaper. 1619 if (mImageWallpaper.equals(wallpaper.wallpaperComponent)) { 1620 if (mLockWallpaperMap.get(userId) == null) { 1621 // We're using the static imagery and there is no lock-specific image in place, 1622 // therefore it's a shared system+lock image that we need to migrate. 1623 migrateSystemToLockWallpaperLocked(userId); 1624 } 1625 } 1626 1627 try { 1628 wallpaper.imageWallpaperPending = false; 1629 if (bindWallpaperComponentLocked(name, false, true, wallpaper, null)) { 1630 wallpaper.wallpaperId = makeWallpaperIdLocked(); 1631 notifyCallbacksLocked(wallpaper); 1632 } 1633 } finally { 1634 Binder.restoreCallingIdentity(ident); 1635 } 1636 } 1637 } 1638 1639 boolean bindWallpaperComponentLocked(ComponentName componentName, boolean force, 1640 boolean fromUser, WallpaperData wallpaper, IRemoteCallback reply) { 1641 if (DEBUG_LIVE) { 1642 Slog.v(TAG, "bindWallpaperComponentLocked: componentName=" + componentName); 1643 } 1644 // Has the component changed? 1645 if (!force) { 1646 if (wallpaper.connection != null) { 1647 if (wallpaper.wallpaperComponent == null) { 1648 if (componentName == null) { 1649 if (DEBUG) Slog.v(TAG, "bindWallpaperComponentLocked: still using default"); 1650 // Still using default wallpaper. 1651 return true; 1652 } 1653 } else if (wallpaper.wallpaperComponent.equals(componentName)) { 1654 // Changing to same wallpaper. 1655 if (DEBUG) Slog.v(TAG, "same wallpaper"); 1656 return true; 1657 } 1658 } 1659 } 1660 1661 try { 1662 if (componentName == null) { 1663 componentName = mDefaultWallpaperComponent; 1664 if (componentName == null) { 1665 // Fall back to static image wallpaper 1666 componentName = mImageWallpaper; 1667 //clearWallpaperComponentLocked(); 1668 //return; 1669 if (DEBUG_LIVE) Slog.v(TAG, "No default component; using image wallpaper"); 1670 } 1671 } 1672 int serviceUserId = wallpaper.userId; 1673 ServiceInfo si = mIPackageManager.getServiceInfo(componentName, 1674 PackageManager.GET_META_DATA | PackageManager.GET_PERMISSIONS, serviceUserId); 1675 if (si == null) { 1676 // The wallpaper component we're trying to use doesn't exist 1677 Slog.w(TAG, "Attempted wallpaper " + componentName + " is unavailable"); 1678 return false; 1679 } 1680 if (!android.Manifest.permission.BIND_WALLPAPER.equals(si.permission)) { 1681 String msg = "Selected service does not require " 1682 + android.Manifest.permission.BIND_WALLPAPER 1683 + ": " + componentName; 1684 if (fromUser) { 1685 throw new SecurityException(msg); 1686 } 1687 Slog.w(TAG, msg); 1688 return false; 1689 } 1690 1691 WallpaperInfo wi = null; 1692 1693 Intent intent = new Intent(WallpaperService.SERVICE_INTERFACE); 1694 if (componentName != null && !componentName.equals(mImageWallpaper)) { 1695 // Make sure the selected service is actually a wallpaper service. 1696 List<ResolveInfo> ris = 1697 mIPackageManager.queryIntentServices(intent, 1698 intent.resolveTypeIfNeeded(mContext.getContentResolver()), 1699 PackageManager.GET_META_DATA, serviceUserId).getList(); 1700 for (int i=0; i<ris.size(); i++) { 1701 ServiceInfo rsi = ris.get(i).serviceInfo; 1702 if (rsi.name.equals(si.name) && 1703 rsi.packageName.equals(si.packageName)) { 1704 try { 1705 wi = new WallpaperInfo(mContext, ris.get(i)); 1706 } catch (XmlPullParserException e) { 1707 if (fromUser) { 1708 throw new IllegalArgumentException(e); 1709 } 1710 Slog.w(TAG, e); 1711 return false; 1712 } catch (IOException e) { 1713 if (fromUser) { 1714 throw new IllegalArgumentException(e); 1715 } 1716 Slog.w(TAG, e); 1717 return false; 1718 } 1719 break; 1720 } 1721 } 1722 if (wi == null) { 1723 String msg = "Selected service is not a wallpaper: " 1724 + componentName; 1725 if (fromUser) { 1726 throw new SecurityException(msg); 1727 } 1728 Slog.w(TAG, msg); 1729 return false; 1730 } 1731 } 1732 1733 // Bind the service! 1734 if (DEBUG) Slog.v(TAG, "Binding to:" + componentName); 1735 WallpaperConnection newConn = new WallpaperConnection(wi, wallpaper); 1736 intent.setComponent(componentName); 1737 intent.putExtra(Intent.EXTRA_CLIENT_LABEL, 1738 com.android.internal.R.string.wallpaper_binding_label); 1739 intent.putExtra(Intent.EXTRA_CLIENT_INTENT, PendingIntent.getActivityAsUser( 1740 mContext, 0, 1741 Intent.createChooser(new Intent(Intent.ACTION_SET_WALLPAPER), 1742 mContext.getText(com.android.internal.R.string.chooser_wallpaper)), 1743 0, null, new UserHandle(serviceUserId))); 1744 if (!mContext.bindServiceAsUser(intent, newConn, 1745 Context.BIND_AUTO_CREATE | Context.BIND_SHOWING_UI 1746 | Context.BIND_FOREGROUND_SERVICE_WHILE_AWAKE, 1747 new UserHandle(serviceUserId))) { 1748 String msg = "Unable to bind service: " 1749 + componentName; 1750 if (fromUser) { 1751 throw new IllegalArgumentException(msg); 1752 } 1753 Slog.w(TAG, msg); 1754 return false; 1755 } 1756 if (wallpaper.userId == mCurrentUserId && mLastWallpaper != null) { 1757 detachWallpaperLocked(mLastWallpaper); 1758 } 1759 wallpaper.wallpaperComponent = componentName; 1760 wallpaper.connection = newConn; 1761 newConn.mReply = reply; 1762 try { 1763 if (wallpaper.userId == mCurrentUserId) { 1764 if (DEBUG) 1765 Slog.v(TAG, "Adding window token: " + newConn.mToken); 1766 mIWindowManager.addWindowToken(newConn.mToken, TYPE_WALLPAPER, DEFAULT_DISPLAY); 1767 mLastWallpaper = wallpaper; 1768 } 1769 } catch (RemoteException e) { 1770 } 1771 } catch (RemoteException e) { 1772 String msg = "Remote exception for " + componentName + "\n" + e; 1773 if (fromUser) { 1774 throw new IllegalArgumentException(msg); 1775 } 1776 Slog.w(TAG, msg); 1777 return false; 1778 } 1779 return true; 1780 } 1781 1782 void detachWallpaperLocked(WallpaperData wallpaper) { 1783 if (wallpaper.connection != null) { 1784 if (wallpaper.connection.mReply != null) { 1785 try { 1786 wallpaper.connection.mReply.sendResult(null); 1787 } catch (RemoteException e) { 1788 } 1789 wallpaper.connection.mReply = null; 1790 } 1791 if (wallpaper.connection.mEngine != null) { 1792 try { 1793 wallpaper.connection.mEngine.destroy(); 1794 } catch (RemoteException e) { 1795 } 1796 } 1797 mContext.unbindService(wallpaper.connection); 1798 try { 1799 if (DEBUG) 1800 Slog.v(TAG, "Removing window token: " + wallpaper.connection.mToken); 1801 mIWindowManager.removeWindowToken(wallpaper.connection.mToken, DEFAULT_DISPLAY); 1802 } catch (RemoteException e) { 1803 } 1804 wallpaper.connection.mService = null; 1805 wallpaper.connection.mEngine = null; 1806 wallpaper.connection = null; 1807 } 1808 } 1809 1810 void clearWallpaperComponentLocked(WallpaperData wallpaper) { 1811 wallpaper.wallpaperComponent = null; 1812 detachWallpaperLocked(wallpaper); 1813 } 1814 1815 void attachServiceLocked(WallpaperConnection conn, WallpaperData wallpaper) { 1816 try { 1817 conn.mService.attach(conn, conn.mToken, 1818 TYPE_WALLPAPER, false, 1819 wallpaper.width, wallpaper.height, wallpaper.padding); 1820 } catch (RemoteException e) { 1821 Slog.w(TAG, "Failed attaching wallpaper; clearing", e); 1822 if (!wallpaper.wallpaperUpdating) { 1823 bindWallpaperComponentLocked(null, false, false, wallpaper, null); 1824 } 1825 } 1826 } 1827 1828 private void notifyCallbacksLocked(WallpaperData wallpaper) { 1829 final int n = wallpaper.callbacks.beginBroadcast(); 1830 for (int i = 0; i < n; i++) { 1831 try { 1832 wallpaper.callbacks.getBroadcastItem(i).onWallpaperChanged(); 1833 } catch (RemoteException e) { 1834 1835 // The RemoteCallbackList will take care of removing 1836 // the dead object for us. 1837 } 1838 } 1839 wallpaper.callbacks.finishBroadcast(); 1840 final Intent intent = new Intent(Intent.ACTION_WALLPAPER_CHANGED); 1841 mContext.sendBroadcastAsUser(intent, new UserHandle(mCurrentUserId)); 1842 } 1843 1844 private void checkPermission(String permission) { 1845 if (PackageManager.PERMISSION_GRANTED!= mContext.checkCallingOrSelfPermission(permission)) { 1846 throw new SecurityException("Access denied to process: " + Binder.getCallingPid() 1847 + ", must have permission " + permission); 1848 } 1849 } 1850 1851 /** 1852 * Certain user types do not support wallpapers (e.g. managed profiles). The check is 1853 * implemented through through the OP_WRITE_WALLPAPER AppOp. 1854 */ 1855 public boolean isWallpaperSupported(String callingPackage) { 1856 return mAppOpsManager.checkOpNoThrow(AppOpsManager.OP_WRITE_WALLPAPER, Binder.getCallingUid(), 1857 callingPackage) == AppOpsManager.MODE_ALLOWED; 1858 } 1859 1860 @Override 1861 public boolean isSetWallpaperAllowed(String callingPackage) { 1862 final PackageManager pm = mContext.getPackageManager(); 1863 String[] uidPackages = pm.getPackagesForUid(Binder.getCallingUid()); 1864 boolean uidMatchPackage = Arrays.asList(uidPackages).contains(callingPackage); 1865 if (!uidMatchPackage) { 1866 return false; // callingPackage was faked. 1867 } 1868 1869 final DevicePolicyManager dpm = mContext.getSystemService(DevicePolicyManager.class); 1870 if (dpm.isDeviceOwnerApp(callingPackage) || dpm.isProfileOwnerApp(callingPackage)) { 1871 return true; 1872 } 1873 final UserManager um = (UserManager) mContext.getSystemService(Context.USER_SERVICE); 1874 return !um.hasUserRestriction(UserManager.DISALLOW_SET_WALLPAPER); 1875 } 1876 1877 @Override 1878 public boolean isWallpaperBackupEligible(int which, int userId) { 1879 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 1880 throw new SecurityException("Only the system may call isWallpaperBackupEligible"); 1881 } 1882 1883 WallpaperData wallpaper = (which == FLAG_LOCK) 1884 ? mLockWallpaperMap.get(userId) 1885 : mWallpaperMap.get(userId); 1886 return (wallpaper != null) ? wallpaper.allowBackup : false; 1887 } 1888 1889 private static JournaledFile makeJournaledFile(int userId) { 1890 final String base = new File(getWallpaperDir(userId), WALLPAPER_INFO).getAbsolutePath(); 1891 return new JournaledFile(new File(base), new File(base + ".tmp")); 1892 } 1893 1894 private void saveSettingsLocked(int userId) { 1895 JournaledFile journal = makeJournaledFile(userId); 1896 FileOutputStream fstream = null; 1897 BufferedOutputStream stream = null; 1898 try { 1899 XmlSerializer out = new FastXmlSerializer(); 1900 fstream = new FileOutputStream(journal.chooseForWrite(), false); 1901 stream = new BufferedOutputStream(fstream); 1902 out.setOutput(stream, StandardCharsets.UTF_8.name()); 1903 out.startDocument(null, true); 1904 1905 WallpaperData wallpaper; 1906 1907 wallpaper = mWallpaperMap.get(userId); 1908 if (wallpaper != null) { 1909 writeWallpaperAttributes(out, "wp", wallpaper); 1910 } 1911 wallpaper = mLockWallpaperMap.get(userId); 1912 if (wallpaper != null) { 1913 writeWallpaperAttributes(out, "kwp", wallpaper); 1914 } 1915 1916 out.endDocument(); 1917 1918 stream.flush(); // also flushes fstream 1919 FileUtils.sync(fstream); 1920 stream.close(); // also closes fstream 1921 journal.commit(); 1922 } catch (IOException e) { 1923 IoUtils.closeQuietly(stream); 1924 journal.rollback(); 1925 } 1926 } 1927 1928 private void writeWallpaperAttributes(XmlSerializer out, String tag, WallpaperData wallpaper) 1929 throws IllegalArgumentException, IllegalStateException, IOException { 1930 out.startTag(null, tag); 1931 out.attribute(null, "id", Integer.toString(wallpaper.wallpaperId)); 1932 out.attribute(null, "width", Integer.toString(wallpaper.width)); 1933 out.attribute(null, "height", Integer.toString(wallpaper.height)); 1934 1935 out.attribute(null, "cropLeft", Integer.toString(wallpaper.cropHint.left)); 1936 out.attribute(null, "cropTop", Integer.toString(wallpaper.cropHint.top)); 1937 out.attribute(null, "cropRight", Integer.toString(wallpaper.cropHint.right)); 1938 out.attribute(null, "cropBottom", Integer.toString(wallpaper.cropHint.bottom)); 1939 1940 if (wallpaper.padding.left != 0) { 1941 out.attribute(null, "paddingLeft", Integer.toString(wallpaper.padding.left)); 1942 } 1943 if (wallpaper.padding.top != 0) { 1944 out.attribute(null, "paddingTop", Integer.toString(wallpaper.padding.top)); 1945 } 1946 if (wallpaper.padding.right != 0) { 1947 out.attribute(null, "paddingRight", Integer.toString(wallpaper.padding.right)); 1948 } 1949 if (wallpaper.padding.bottom != 0) { 1950 out.attribute(null, "paddingBottom", Integer.toString(wallpaper.padding.bottom)); 1951 } 1952 1953 out.attribute(null, "name", wallpaper.name); 1954 if (wallpaper.wallpaperComponent != null 1955 && !wallpaper.wallpaperComponent.equals(mImageWallpaper)) { 1956 out.attribute(null, "component", 1957 wallpaper.wallpaperComponent.flattenToShortString()); 1958 } 1959 1960 if (wallpaper.allowBackup) { 1961 out.attribute(null, "backup", "true"); 1962 } 1963 1964 out.endTag(null, tag); 1965 } 1966 1967 private void migrateFromOld() { 1968 File oldWallpaper = new File(WallpaperBackupHelper.WALLPAPER_IMAGE_KEY); 1969 File oldInfo = new File(WallpaperBackupHelper.WALLPAPER_INFO_KEY); 1970 if (oldWallpaper.exists()) { 1971 File newWallpaper = new File(getWallpaperDir(0), WALLPAPER); 1972 oldWallpaper.renameTo(newWallpaper); 1973 } 1974 if (oldInfo.exists()) { 1975 File newInfo = new File(getWallpaperDir(0), WALLPAPER_INFO); 1976 oldInfo.renameTo(newInfo); 1977 } 1978 } 1979 1980 private int getAttributeInt(XmlPullParser parser, String name, int defValue) { 1981 String value = parser.getAttributeValue(null, name); 1982 if (value == null) { 1983 return defValue; 1984 } 1985 return Integer.parseInt(value); 1986 } 1987 1988 /** 1989 * Sometimes it is expected the wallpaper map may not have a user's data. E.g. This could 1990 * happen during user switch. The async user switch observer may not have received 1991 * the event yet. We use this safe method when we don't care about this ordering and just 1992 * want to update the data. The data is going to be applied when the user switch observer 1993 * is eventually executed. 1994 */ 1995 private WallpaperData getWallpaperSafeLocked(int userId, int which) { 1996 // We're setting either just system (work with the system wallpaper), 1997 // both (also work with the system wallpaper), or just the lock 1998 // wallpaper (update against the existing lock wallpaper if any). 1999 // Combined or just-system operations use the 'system' WallpaperData 2000 // for this use; lock-only operations use the dedicated one. 2001 final SparseArray<WallpaperData> whichSet = 2002 (which == FLAG_LOCK) ? mLockWallpaperMap : mWallpaperMap; 2003 WallpaperData wallpaper = whichSet.get(userId); 2004 if (wallpaper == null) { 2005 // common case, this is the first lookup post-boot of the system or 2006 // unified lock, so we bring up the saved state lazily now and recheck. 2007 loadSettingsLocked(userId, false); 2008 wallpaper = whichSet.get(userId); 2009 // if it's still null here, this is a lock-only operation and there is not 2010 // yet a lock-only wallpaper set for this user, so we need to establish 2011 // it now. 2012 if (wallpaper == null) { 2013 if (which == FLAG_LOCK) { 2014 wallpaper = new WallpaperData(userId, 2015 WALLPAPER_LOCK_ORIG, WALLPAPER_LOCK_CROP); 2016 mLockWallpaperMap.put(userId, wallpaper); 2017 ensureSaneWallpaperData(wallpaper); 2018 } else { 2019 // sanity fallback: we're in bad shape, but establishing a known 2020 // valid system+lock WallpaperData will keep us from dying. 2021 Slog.wtf(TAG, "Didn't find wallpaper in non-lock case!"); 2022 wallpaper = new WallpaperData(userId, WALLPAPER, WALLPAPER_CROP); 2023 mWallpaperMap.put(userId, wallpaper); 2024 ensureSaneWallpaperData(wallpaper); 2025 } 2026 } 2027 } 2028 return wallpaper; 2029 } 2030 2031 private void loadSettingsLocked(int userId, boolean keepDimensionHints) { 2032 if (DEBUG) Slog.v(TAG, "loadSettingsLocked"); 2033 2034 JournaledFile journal = makeJournaledFile(userId); 2035 FileInputStream stream = null; 2036 File file = journal.chooseForRead(); 2037 if (!file.exists()) { 2038 // This should only happen one time, when upgrading from a legacy system 2039 migrateFromOld(); 2040 } 2041 WallpaperData wallpaper = mWallpaperMap.get(userId); 2042 if (wallpaper == null) { 2043 wallpaper = new WallpaperData(userId, WALLPAPER, WALLPAPER_CROP); 2044 wallpaper.allowBackup = true; 2045 mWallpaperMap.put(userId, wallpaper); 2046 if (!wallpaper.cropExists()) { 2047 if (wallpaper.sourceExists()) { 2048 generateCrop(wallpaper); 2049 } else { 2050 Slog.i(TAG, "No static wallpaper imagery; defaults will be shown"); 2051 } 2052 } 2053 } 2054 boolean success = false; 2055 try { 2056 stream = new FileInputStream(file); 2057 XmlPullParser parser = Xml.newPullParser(); 2058 parser.setInput(stream, StandardCharsets.UTF_8.name()); 2059 2060 int type; 2061 do { 2062 type = parser.next(); 2063 if (type == XmlPullParser.START_TAG) { 2064 String tag = parser.getName(); 2065 if ("wp".equals(tag)) { 2066 // Common to system + lock wallpapers 2067 parseWallpaperAttributes(parser, wallpaper, keepDimensionHints); 2068 2069 // A system wallpaper might also be a live wallpaper 2070 String comp = parser.getAttributeValue(null, "component"); 2071 wallpaper.nextWallpaperComponent = comp != null 2072 ? ComponentName.unflattenFromString(comp) 2073 : null; 2074 if (wallpaper.nextWallpaperComponent == null 2075 || "android".equals(wallpaper.nextWallpaperComponent 2076 .getPackageName())) { 2077 wallpaper.nextWallpaperComponent = mImageWallpaper; 2078 } 2079 2080 if (DEBUG) { 2081 Slog.v(TAG, "mWidth:" + wallpaper.width); 2082 Slog.v(TAG, "mHeight:" + wallpaper.height); 2083 Slog.v(TAG, "cropRect:" + wallpaper.cropHint); 2084 Slog.v(TAG, "mName:" + wallpaper.name); 2085 Slog.v(TAG, "mNextWallpaperComponent:" 2086 + wallpaper.nextWallpaperComponent); 2087 } 2088 } else if ("kwp".equals(tag)) { 2089 // keyguard-specific wallpaper for this user 2090 WallpaperData lockWallpaper = mLockWallpaperMap.get(userId); 2091 if (lockWallpaper == null) { 2092 lockWallpaper = new WallpaperData(userId, 2093 WALLPAPER_LOCK_ORIG, WALLPAPER_LOCK_CROP); 2094 mLockWallpaperMap.put(userId, lockWallpaper); 2095 } 2096 parseWallpaperAttributes(parser, lockWallpaper, false); 2097 } 2098 } 2099 } while (type != XmlPullParser.END_DOCUMENT); 2100 success = true; 2101 } catch (FileNotFoundException e) { 2102 Slog.w(TAG, "no current wallpaper -- first boot?"); 2103 } catch (NullPointerException e) { 2104 Slog.w(TAG, "failed parsing " + file + " " + e); 2105 } catch (NumberFormatException e) { 2106 Slog.w(TAG, "failed parsing " + file + " " + e); 2107 } catch (XmlPullParserException e) { 2108 Slog.w(TAG, "failed parsing " + file + " " + e); 2109 } catch (IOException e) { 2110 Slog.w(TAG, "failed parsing " + file + " " + e); 2111 } catch (IndexOutOfBoundsException e) { 2112 Slog.w(TAG, "failed parsing " + file + " " + e); 2113 } 2114 IoUtils.closeQuietly(stream); 2115 2116 if (!success) { 2117 wallpaper.width = -1; 2118 wallpaper.height = -1; 2119 wallpaper.cropHint.set(0, 0, 0, 0); 2120 wallpaper.padding.set(0, 0, 0, 0); 2121 wallpaper.name = ""; 2122 2123 mLockWallpaperMap.remove(userId); 2124 } else { 2125 if (wallpaper.wallpaperId <= 0) { 2126 wallpaper.wallpaperId = makeWallpaperIdLocked(); 2127 if (DEBUG) { 2128 Slog.w(TAG, "Didn't set wallpaper id in loadSettingsLocked(" + userId 2129 + "); now " + wallpaper.wallpaperId); 2130 } 2131 } 2132 } 2133 2134 ensureSaneWallpaperData(wallpaper); 2135 WallpaperData lockWallpaper = mLockWallpaperMap.get(userId); 2136 if (lockWallpaper != null) { 2137 ensureSaneWallpaperData(lockWallpaper); 2138 } 2139 } 2140 2141 private void ensureSaneWallpaperData(WallpaperData wallpaper) { 2142 // We always want to have some reasonable width hint. 2143 int baseSize = getMaximumSizeDimension(); 2144 if (wallpaper.width < baseSize) { 2145 wallpaper.width = baseSize; 2146 } 2147 if (wallpaper.height < baseSize) { 2148 wallpaper.height = baseSize; 2149 } 2150 // and crop, if not previously specified 2151 if (wallpaper.cropHint.width() <= 0 2152 || wallpaper.cropHint.height() <= 0) { 2153 wallpaper.cropHint.set(0, 0, wallpaper.width, wallpaper.height); 2154 } 2155 } 2156 2157 private void parseWallpaperAttributes(XmlPullParser parser, WallpaperData wallpaper, 2158 boolean keepDimensionHints) { 2159 final String idString = parser.getAttributeValue(null, "id"); 2160 if (idString != null) { 2161 final int id = wallpaper.wallpaperId = Integer.parseInt(idString); 2162 if (id > mWallpaperId) { 2163 mWallpaperId = id; 2164 } 2165 } else { 2166 wallpaper.wallpaperId = makeWallpaperIdLocked(); 2167 } 2168 2169 if (!keepDimensionHints) { 2170 wallpaper.width = Integer.parseInt(parser.getAttributeValue(null, "width")); 2171 wallpaper.height = Integer.parseInt(parser 2172 .getAttributeValue(null, "height")); 2173 } 2174 wallpaper.cropHint.left = getAttributeInt(parser, "cropLeft", 0); 2175 wallpaper.cropHint.top = getAttributeInt(parser, "cropTop", 0); 2176 wallpaper.cropHint.right = getAttributeInt(parser, "cropRight", 0); 2177 wallpaper.cropHint.bottom = getAttributeInt(parser, "cropBottom", 0); 2178 wallpaper.padding.left = getAttributeInt(parser, "paddingLeft", 0); 2179 wallpaper.padding.top = getAttributeInt(parser, "paddingTop", 0); 2180 wallpaper.padding.right = getAttributeInt(parser, "paddingRight", 0); 2181 wallpaper.padding.bottom = getAttributeInt(parser, "paddingBottom", 0); 2182 wallpaper.name = parser.getAttributeValue(null, "name"); 2183 wallpaper.allowBackup = "true".equals(parser.getAttributeValue(null, "backup")); 2184 } 2185 2186 private int getMaximumSizeDimension() { 2187 WindowManager wm = (WindowManager)mContext.getSystemService(Context.WINDOW_SERVICE); 2188 Display d = wm.getDefaultDisplay(); 2189 return d.getMaximumSizeDimension(); 2190 } 2191 2192 // Called by SystemBackupAgent after files are restored to disk. 2193 public void settingsRestored() { 2194 // Verify caller is the system 2195 if (Binder.getCallingUid() != android.os.Process.SYSTEM_UID) { 2196 throw new RuntimeException("settingsRestored() can only be called from the system process"); 2197 } 2198 // TODO: If necessary, make it work for secondary users as well. This currently assumes 2199 // restores only to the primary user 2200 if (DEBUG) Slog.v(TAG, "settingsRestored"); 2201 WallpaperData wallpaper = null; 2202 boolean success = false; 2203 synchronized (mLock) { 2204 loadSettingsLocked(UserHandle.USER_SYSTEM, false); 2205 wallpaper = mWallpaperMap.get(UserHandle.USER_SYSTEM); 2206 wallpaper.wallpaperId = makeWallpaperIdLocked(); // always bump id at restore 2207 wallpaper.allowBackup = true; // by definition if it was restored 2208 if (wallpaper.nextWallpaperComponent != null 2209 && !wallpaper.nextWallpaperComponent.equals(mImageWallpaper)) { 2210 if (!bindWallpaperComponentLocked(wallpaper.nextWallpaperComponent, false, false, 2211 wallpaper, null)) { 2212 // No such live wallpaper or other failure; fall back to the default 2213 // live wallpaper (since the profile being restored indicated that the 2214 // user had selected a live rather than static one). 2215 bindWallpaperComponentLocked(null, false, false, wallpaper, null); 2216 } 2217 success = true; 2218 } else { 2219 // If there's a wallpaper name, we use that. If that can't be loaded, then we 2220 // use the default. 2221 if ("".equals(wallpaper.name)) { 2222 if (DEBUG) Slog.v(TAG, "settingsRestored: name is empty"); 2223 success = true; 2224 } else { 2225 if (DEBUG) Slog.v(TAG, "settingsRestored: attempting to restore named resource"); 2226 success = restoreNamedResourceLocked(wallpaper); 2227 } 2228 if (DEBUG) Slog.v(TAG, "settingsRestored: success=" + success 2229 + " id=" + wallpaper.wallpaperId); 2230 if (success) { 2231 generateCrop(wallpaper); // based on the new image + metadata 2232 bindWallpaperComponentLocked(wallpaper.nextWallpaperComponent, true, false, 2233 wallpaper, null); 2234 } 2235 } 2236 } 2237 2238 if (!success) { 2239 Slog.e(TAG, "Failed to restore wallpaper: '" + wallpaper.name + "'"); 2240 wallpaper.name = ""; 2241 getWallpaperDir(UserHandle.USER_SYSTEM).delete(); 2242 } 2243 2244 synchronized (mLock) { 2245 saveSettingsLocked(UserHandle.USER_SYSTEM); 2246 } 2247 } 2248 2249 // Restore the named resource bitmap to both source + crop files 2250 boolean restoreNamedResourceLocked(WallpaperData wallpaper) { 2251 if (wallpaper.name.length() > 4 && "res:".equals(wallpaper.name.substring(0, 4))) { 2252 String resName = wallpaper.name.substring(4); 2253 2254 String pkg = null; 2255 int colon = resName.indexOf(':'); 2256 if (colon > 0) { 2257 pkg = resName.substring(0, colon); 2258 } 2259 2260 String ident = null; 2261 int slash = resName.lastIndexOf('/'); 2262 if (slash > 0) { 2263 ident = resName.substring(slash+1); 2264 } 2265 2266 String type = null; 2267 if (colon > 0 && slash > 0 && (slash-colon) > 1) { 2268 type = resName.substring(colon+1, slash); 2269 } 2270 2271 if (pkg != null && ident != null && type != null) { 2272 int resId = -1; 2273 InputStream res = null; 2274 FileOutputStream fos = null; 2275 FileOutputStream cos = null; 2276 try { 2277 Context c = mContext.createPackageContext(pkg, Context.CONTEXT_RESTRICTED); 2278 Resources r = c.getResources(); 2279 resId = r.getIdentifier(resName, null, null); 2280 if (resId == 0) { 2281 Slog.e(TAG, "couldn't resolve identifier pkg=" + pkg + " type=" + type 2282 + " ident=" + ident); 2283 return false; 2284 } 2285 2286 res = r.openRawResource(resId); 2287 if (wallpaper.wallpaperFile.exists()) { 2288 wallpaper.wallpaperFile.delete(); 2289 wallpaper.cropFile.delete(); 2290 } 2291 fos = new FileOutputStream(wallpaper.wallpaperFile); 2292 cos = new FileOutputStream(wallpaper.cropFile); 2293 2294 byte[] buffer = new byte[32768]; 2295 int amt; 2296 while ((amt=res.read(buffer)) > 0) { 2297 fos.write(buffer, 0, amt); 2298 cos.write(buffer, 0, amt); 2299 } 2300 // mWallpaperObserver will notice the close and send the change broadcast 2301 2302 Slog.v(TAG, "Restored wallpaper: " + resName); 2303 return true; 2304 } catch (NameNotFoundException e) { 2305 Slog.e(TAG, "Package name " + pkg + " not found"); 2306 } catch (Resources.NotFoundException e) { 2307 Slog.e(TAG, "Resource not found: " + resId); 2308 } catch (IOException e) { 2309 Slog.e(TAG, "IOException while restoring wallpaper ", e); 2310 } finally { 2311 IoUtils.closeQuietly(res); 2312 if (fos != null) { 2313 FileUtils.sync(fos); 2314 } 2315 if (cos != null) { 2316 FileUtils.sync(cos); 2317 } 2318 IoUtils.closeQuietly(fos); 2319 IoUtils.closeQuietly(cos); 2320 } 2321 } 2322 } 2323 return false; 2324 } 2325 2326 @Override 2327 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 2328 if (!DumpUtils.checkDumpPermission(mContext, TAG, pw)) return; 2329 2330 synchronized (mLock) { 2331 pw.println("System wallpaper state:"); 2332 for (int i = 0; i < mWallpaperMap.size(); i++) { 2333 WallpaperData wallpaper = mWallpaperMap.valueAt(i); 2334 pw.print(" User "); pw.print(wallpaper.userId); 2335 pw.print(": id="); pw.println(wallpaper.wallpaperId); 2336 pw.print(" mWidth="); 2337 pw.print(wallpaper.width); 2338 pw.print(" mHeight="); 2339 pw.println(wallpaper.height); 2340 pw.print(" mCropHint="); pw.println(wallpaper.cropHint); 2341 pw.print(" mPadding="); pw.println(wallpaper.padding); 2342 pw.print(" mName="); pw.println(wallpaper.name); 2343 pw.print(" mWallpaperComponent="); pw.println(wallpaper.wallpaperComponent); 2344 if (wallpaper.connection != null) { 2345 WallpaperConnection conn = wallpaper.connection; 2346 pw.print(" Wallpaper connection "); 2347 pw.print(conn); 2348 pw.println(":"); 2349 if (conn.mInfo != null) { 2350 pw.print(" mInfo.component="); 2351 pw.println(conn.mInfo.getComponent()); 2352 } 2353 pw.print(" mToken="); 2354 pw.println(conn.mToken); 2355 pw.print(" mService="); 2356 pw.println(conn.mService); 2357 pw.print(" mEngine="); 2358 pw.println(conn.mEngine); 2359 pw.print(" mLastDiedTime="); 2360 pw.println(wallpaper.lastDiedTime - SystemClock.uptimeMillis()); 2361 } 2362 } 2363 pw.println("Lock wallpaper state:"); 2364 for (int i = 0; i < mLockWallpaperMap.size(); i++) { 2365 WallpaperData wallpaper = mLockWallpaperMap.valueAt(i); 2366 pw.print(" User "); pw.print(wallpaper.userId); 2367 pw.print(": id="); pw.println(wallpaper.wallpaperId); 2368 pw.print(" mWidth="); pw.print(wallpaper.width); 2369 pw.print(" mHeight="); pw.println(wallpaper.height); 2370 pw.print(" mCropHint="); pw.println(wallpaper.cropHint); 2371 pw.print(" mPadding="); pw.println(wallpaper.padding); 2372 pw.print(" mName="); pw.println(wallpaper.name); 2373 } 2374 2375 } 2376 } 2377 } 2378
