ViewRootImpl.java revision 06a7925a2e5ac604b57c3b2855010558fd7bc46b
1/* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.view; 18 19import android.Manifest; 20import android.animation.LayoutTransition; 21import android.app.ActivityManagerNative; 22import android.content.ClipDescription; 23import android.content.ComponentCallbacks; 24import android.content.ComponentCallbacks2; 25import android.content.Context; 26import android.content.pm.PackageManager; 27import android.content.res.CompatibilityInfo; 28import android.content.res.Configuration; 29import android.content.res.Resources; 30import android.graphics.Canvas; 31import android.graphics.Matrix; 32import android.graphics.Paint; 33import android.graphics.PixelFormat; 34import android.graphics.Point; 35import android.graphics.PointF; 36import android.graphics.PorterDuff; 37import android.graphics.Rect; 38import android.graphics.Region; 39import android.graphics.drawable.Drawable; 40import android.hardware.display.DisplayManager; 41import android.hardware.display.DisplayManager.DisplayListener; 42import android.media.AudioManager; 43import android.os.Binder; 44import android.os.Bundle; 45import android.os.Debug; 46import android.os.Handler; 47import android.os.Looper; 48import android.os.Message; 49import android.os.ParcelFileDescriptor; 50import android.os.PowerManager; 51import android.os.Process; 52import android.os.RemoteException; 53import android.os.SystemClock; 54import android.os.SystemProperties; 55import android.os.Trace; 56import android.util.AndroidRuntimeException; 57import android.util.DisplayMetrics; 58import android.util.Log; 59import android.util.Slog; 60import android.util.TypedValue; 61import android.view.Surface.OutOfResourcesException; 62import android.view.View.AttachInfo; 63import android.view.View.MeasureSpec; 64import android.view.accessibility.AccessibilityEvent; 65import android.view.accessibility.AccessibilityManager; 66import android.view.accessibility.AccessibilityManager.AccessibilityStateChangeListener; 67import android.view.accessibility.AccessibilityNodeInfo; 68import android.view.accessibility.AccessibilityNodeProvider; 69import android.view.accessibility.IAccessibilityInteractionConnection; 70import android.view.accessibility.IAccessibilityInteractionConnectionCallback; 71import android.view.animation.AccelerateDecelerateInterpolator; 72import android.view.animation.Interpolator; 73import android.view.inputmethod.InputConnection; 74import android.view.inputmethod.InputMethodManager; 75import android.widget.Scroller; 76 77import com.android.internal.R; 78import com.android.internal.os.SomeArgs; 79import com.android.internal.policy.PolicyManager; 80import com.android.internal.view.BaseSurfaceHolder; 81import com.android.internal.view.RootViewSurfaceTaker; 82 83import java.io.FileDescriptor; 84import java.io.IOException; 85import java.io.OutputStream; 86import java.io.PrintWriter; 87import java.lang.ref.WeakReference; 88import java.util.ArrayList; 89import java.util.HashSet; 90 91/** 92 * The top of a view hierarchy, implementing the needed protocol between View 93 * and the WindowManager. This is for the most part an internal implementation 94 * detail of {@link WindowManagerGlobal}. 95 * 96 * {@hide} 97 */ 98@SuppressWarnings({"EmptyCatchBlock", "PointlessBooleanExpression"}) 99public final class ViewRootImpl implements ViewParent, 100 View.AttachInfo.Callbacks, HardwareRenderer.HardwareDrawCallbacks { 101 private static final String TAG = "ViewRootImpl"; 102 private static final boolean DBG = false; 103 private static final boolean LOCAL_LOGV = false; 104 /** @noinspection PointlessBooleanExpression*/ 105 private static final boolean DEBUG_DRAW = false || LOCAL_LOGV; 106 private static final boolean DEBUG_LAYOUT = false || LOCAL_LOGV; 107 private static final boolean DEBUG_DIALOG = false || LOCAL_LOGV; 108 private static final boolean DEBUG_INPUT_RESIZE = false || LOCAL_LOGV; 109 private static final boolean DEBUG_ORIENTATION = false || LOCAL_LOGV; 110 private static final boolean DEBUG_TRACKBALL = false || LOCAL_LOGV; 111 private static final boolean DEBUG_IMF = false || LOCAL_LOGV; 112 private static final boolean DEBUG_CONFIGURATION = false || LOCAL_LOGV; 113 private static final boolean DEBUG_FPS = false; 114 private static final boolean DEBUG_INPUT_STAGES = false || LOCAL_LOGV; 115 116 /** 117 * Set this system property to true to force the view hierarchy to render 118 * at 60 Hz. This can be used to measure the potential framerate. 119 */ 120 private static final String PROPERTY_PROFILE_RENDERING = "viewroot.profile_rendering"; 121 private static final String PROPERTY_MEDIA_DISABLED = "config.disable_media"; 122 123 /** 124 * Maximum time we allow the user to roll the trackball enough to generate 125 * a key event, before resetting the counters. 126 */ 127 static final int MAX_TRACKBALL_DELAY = 250; 128 129 static final ThreadLocal<RunQueue> sRunQueues = new ThreadLocal<RunQueue>(); 130 131 static final ArrayList<Runnable> sFirstDrawHandlers = new ArrayList<Runnable>(); 132 static boolean sFirstDrawComplete = false; 133 134 static final ArrayList<ComponentCallbacks> sConfigCallbacks 135 = new ArrayList<ComponentCallbacks>(); 136 137 final Context mContext; 138 final IWindowSession mWindowSession; 139 final Display mDisplay; 140 final DisplayManager mDisplayManager; 141 final String mBasePackageName; 142 143 final int[] mTmpLocation = new int[2]; 144 145 final TypedValue mTmpValue = new TypedValue(); 146 147 final Thread mThread; 148 149 final WindowLeaked mLocation; 150 151 final WindowManager.LayoutParams mWindowAttributes = new WindowManager.LayoutParams(); 152 153 final W mWindow; 154 155 final int mTargetSdkVersion; 156 157 int mSeq; 158 159 View mView; 160 161 View mAccessibilityFocusedHost; 162 AccessibilityNodeInfo mAccessibilityFocusedVirtualView; 163 164 int mViewVisibility; 165 boolean mAppVisible = true; 166 int mOrigWindowType = -1; 167 168 // Set to true if the owner of this window is in the stopped state, 169 // so the window should no longer be active. 170 boolean mStopped = false; 171 172 boolean mLastInCompatMode = false; 173 174 SurfaceHolder.Callback2 mSurfaceHolderCallback; 175 BaseSurfaceHolder mSurfaceHolder; 176 boolean mIsCreating; 177 boolean mDrawingAllowed; 178 179 final Region mTransparentRegion; 180 final Region mPreviousTransparentRegion; 181 182 int mWidth; 183 int mHeight; 184 Rect mDirty; 185 final Rect mCurrentDirty = new Rect(); 186 boolean mIsAnimating; 187 188 CompatibilityInfo.Translator mTranslator; 189 190 final View.AttachInfo mAttachInfo; 191 InputChannel mInputChannel; 192 InputQueue.Callback mInputQueueCallback; 193 InputQueue mInputQueue; 194 FallbackEventHandler mFallbackEventHandler; 195 Choreographer mChoreographer; 196 197 final Rect mTempRect; // used in the transaction to not thrash the heap. 198 final Rect mVisRect; // used to retrieve visible rect of focused view. 199 200 boolean mTraversalScheduled; 201 int mTraversalBarrier; 202 boolean mWillDrawSoon; 203 /** Set to true while in performTraversals for detecting when die(true) is called from internal 204 * callbacks such as onMeasure, onPreDraw, onDraw and deferring doDie() until later. */ 205 boolean mIsInTraversal; 206 boolean mFitSystemWindowsRequested; 207 boolean mLayoutRequested; 208 boolean mFirst; 209 boolean mReportNextDraw; 210 boolean mFullRedrawNeeded; 211 boolean mNewSurfaceNeeded; 212 boolean mHasHadWindowFocus; 213 boolean mLastWasImTarget; 214 boolean mWindowsAnimating; 215 boolean mDrawDuringWindowsAnimating; 216 boolean mIsDrawing; 217 int mLastSystemUiVisibility; 218 int mClientWindowLayoutFlags; 219 boolean mLastOverscanRequested; 220 221 // Pool of queued input events. 222 private static final int MAX_QUEUED_INPUT_EVENT_POOL_SIZE = 10; 223 private QueuedInputEvent mQueuedInputEventPool; 224 private int mQueuedInputEventPoolSize; 225 226 /* Input event queue. 227 * Pending input events are input events waiting to be delivered to the input stages 228 * and handled by the application. 229 */ 230 QueuedInputEvent mPendingInputEventHead; 231 QueuedInputEvent mPendingInputEventTail; 232 int mPendingInputEventCount; 233 boolean mProcessInputEventsScheduled; 234 String mPendingInputEventQueueLengthCounterName = "pq"; 235 236 InputStage mFirstInputStage; 237 InputStage mFirstPostImeInputStage; 238 InputStage mSyntheticInputStage; 239 240 boolean mWindowAttributesChanged = false; 241 int mWindowAttributesChangesFlag = 0; 242 243 // These can be accessed by any thread, must be protected with a lock. 244 // Surface can never be reassigned or cleared (use Surface.clear()). 245 private final Surface mSurface = new Surface(); 246 247 boolean mAdded; 248 boolean mAddedTouchMode; 249 250 final DisplayAdjustments mDisplayAdjustments; 251 252 // These are accessed by multiple threads. 253 final Rect mWinFrame; // frame given by window manager. 254 255 final Rect mPendingOverscanInsets = new Rect(); 256 final Rect mPendingVisibleInsets = new Rect(); 257 final Rect mPendingContentInsets = new Rect(); 258 final ViewTreeObserver.InternalInsetsInfo mLastGivenInsets 259 = new ViewTreeObserver.InternalInsetsInfo(); 260 261 final Rect mFitSystemWindowsInsets = new Rect(); 262 263 final Configuration mLastConfiguration = new Configuration(); 264 final Configuration mPendingConfiguration = new Configuration(); 265 266 boolean mScrollMayChange; 267 int mSoftInputMode; 268 WeakReference<View> mLastScrolledFocus; 269 int mScrollY; 270 int mCurScrollY; 271 Scroller mScroller; 272 HardwareLayer mResizeBuffer; 273 long mResizeBufferStartTime; 274 int mResizeBufferDuration; 275 // Used to block the creation of the ResizeBuffer due to invalidations in 276 // the previous DisplayList tree that must prevent re-execution. 277 // Currently this means a functor was detached. 278 boolean mBlockResizeBuffer; 279 static final Interpolator mResizeInterpolator = new AccelerateDecelerateInterpolator(); 280 private ArrayList<LayoutTransition> mPendingTransitions; 281 282 final ViewConfiguration mViewConfiguration; 283 284 /* Drag/drop */ 285 ClipDescription mDragDescription; 286 View mCurrentDragView; 287 volatile Object mLocalDragState; 288 final PointF mDragPoint = new PointF(); 289 final PointF mLastTouchPoint = new PointF(); 290 291 private boolean mProfileRendering; 292 private Choreographer.FrameCallback mRenderProfiler; 293 private boolean mRenderProfilingEnabled; 294 295 private boolean mMediaDisabled; 296 297 // Variables to track frames per second, enabled via DEBUG_FPS flag 298 private long mFpsStartTime = -1; 299 private long mFpsPrevTime = -1; 300 private int mFpsNumFrames; 301 302 /** 303 * see {@link #playSoundEffect(int)} 304 */ 305 AudioManager mAudioManager; 306 307 final AccessibilityManager mAccessibilityManager; 308 309 AccessibilityInteractionController mAccessibilityInteractionController; 310 311 AccessibilityInteractionConnectionManager mAccessibilityInteractionConnectionManager; 312 313 SendWindowContentChangedAccessibilityEvent mSendWindowContentChangedAccessibilityEvent; 314 315 HashSet<View> mTempHashSet; 316 317 private final int mDensity; 318 private final int mNoncompatDensity; 319 320 private boolean mInLayout = false; 321 ArrayList<View> mLayoutRequesters = new ArrayList<View>(); 322 boolean mHandlingLayoutInLayoutRequest = false; 323 324 private int mViewLayoutDirectionInitial; 325 326 /** Set to true once doDie() has been called. */ 327 private boolean mRemoved; 328 329 /** 330 * Consistency verifier for debugging purposes. 331 */ 332 protected final InputEventConsistencyVerifier mInputEventConsistencyVerifier = 333 InputEventConsistencyVerifier.isInstrumentationEnabled() ? 334 new InputEventConsistencyVerifier(this, 0) : null; 335 336 static final class SystemUiVisibilityInfo { 337 int seq; 338 int globalVisibility; 339 int localValue; 340 int localChanges; 341 } 342 343 public ViewRootImpl(Context context, Display display) { 344 mContext = context; 345 mWindowSession = WindowManagerGlobal.getWindowSession(); 346 mDisplay = display; 347 mBasePackageName = context.getBasePackageName(); 348 349 mDisplayAdjustments = display.getDisplayAdjustments(); 350 351 mThread = Thread.currentThread(); 352 mLocation = new WindowLeaked(null); 353 mLocation.fillInStackTrace(); 354 mWidth = -1; 355 mHeight = -1; 356 mDirty = new Rect(); 357 mTempRect = new Rect(); 358 mVisRect = new Rect(); 359 mWinFrame = new Rect(); 360 mWindow = new W(this); 361 mTargetSdkVersion = context.getApplicationInfo().targetSdkVersion; 362 mViewVisibility = View.GONE; 363 mTransparentRegion = new Region(); 364 mPreviousTransparentRegion = new Region(); 365 mFirst = true; // true for the first time the view is added 366 mAdded = false; 367 mAccessibilityManager = AccessibilityManager.getInstance(context); 368 mAccessibilityInteractionConnectionManager = 369 new AccessibilityInteractionConnectionManager(); 370 mAccessibilityManager.addAccessibilityStateChangeListener( 371 mAccessibilityInteractionConnectionManager); 372 mAttachInfo = new View.AttachInfo(mWindowSession, mWindow, display, this, mHandler, this); 373 mViewConfiguration = ViewConfiguration.get(context); 374 mDensity = context.getResources().getDisplayMetrics().densityDpi; 375 mNoncompatDensity = context.getResources().getDisplayMetrics().noncompatDensityDpi; 376 mFallbackEventHandler = PolicyManager.makeNewFallbackEventHandler(context); 377 mChoreographer = Choreographer.getInstance(); 378 mDisplayManager = (DisplayManager)context.getSystemService(Context.DISPLAY_SERVICE); 379 loadSystemProperties(); 380 } 381 382 public static void addFirstDrawHandler(Runnable callback) { 383 synchronized (sFirstDrawHandlers) { 384 if (!sFirstDrawComplete) { 385 sFirstDrawHandlers.add(callback); 386 } 387 } 388 } 389 390 public static void addConfigCallback(ComponentCallbacks callback) { 391 synchronized (sConfigCallbacks) { 392 sConfigCallbacks.add(callback); 393 } 394 } 395 396 // FIXME for perf testing only 397 private boolean mProfile = false; 398 399 /** 400 * Call this to profile the next traversal call. 401 * FIXME for perf testing only. Remove eventually 402 */ 403 public void profile() { 404 mProfile = true; 405 } 406 407 /** 408 * Indicates whether we are in touch mode. Calling this method triggers an IPC 409 * call and should be avoided whenever possible. 410 * 411 * @return True, if the device is in touch mode, false otherwise. 412 * 413 * @hide 414 */ 415 static boolean isInTouchMode() { 416 IWindowSession windowSession = WindowManagerGlobal.peekWindowSession(); 417 if (windowSession != null) { 418 try { 419 return windowSession.getInTouchMode(); 420 } catch (RemoteException e) { 421 } 422 } 423 return false; 424 } 425 426 /** 427 * We have one child 428 */ 429 public void setView(View view, WindowManager.LayoutParams attrs, View panelParentView) { 430 synchronized (this) { 431 if (mView == null) { 432 mView = view; 433 434 mAttachInfo.mDisplayState = mDisplay.getState(); 435 mDisplayManager.registerDisplayListener(mDisplayListener, mHandler); 436 437 mViewLayoutDirectionInitial = mView.getRawLayoutDirection(); 438 mFallbackEventHandler.setView(view); 439 mWindowAttributes.copyFrom(attrs); 440 if (mWindowAttributes.packageName == null) { 441 mWindowAttributes.packageName = mBasePackageName; 442 } 443 attrs = mWindowAttributes; 444 // Keep track of the actual window flags supplied by the client. 445 mClientWindowLayoutFlags = attrs.flags; 446 447 setAccessibilityFocus(null, null); 448 449 if (view instanceof RootViewSurfaceTaker) { 450 mSurfaceHolderCallback = 451 ((RootViewSurfaceTaker)view).willYouTakeTheSurface(); 452 if (mSurfaceHolderCallback != null) { 453 mSurfaceHolder = new TakenSurfaceHolder(); 454 mSurfaceHolder.setFormat(PixelFormat.UNKNOWN); 455 } 456 } 457 458 CompatibilityInfo compatibilityInfo = mDisplayAdjustments.getCompatibilityInfo(); 459 mTranslator = compatibilityInfo.getTranslator(); 460 mDisplayAdjustments.setActivityToken(attrs.token); 461 462 // If the application owns the surface, don't enable hardware acceleration 463 if (mSurfaceHolder == null) { 464 enableHardwareAcceleration(attrs); 465 } 466 467 boolean restore = false; 468 if (mTranslator != null) { 469 mSurface.setCompatibilityTranslator(mTranslator); 470 restore = true; 471 attrs.backup(); 472 mTranslator.translateWindowLayout(attrs); 473 } 474 if (DEBUG_LAYOUT) Log.d(TAG, "WindowLayout in setView:" + attrs); 475 476 if (!compatibilityInfo.supportsScreen()) { 477 attrs.privateFlags |= WindowManager.LayoutParams.PRIVATE_FLAG_COMPATIBLE_WINDOW; 478 mLastInCompatMode = true; 479 } 480 481 mSoftInputMode = attrs.softInputMode; 482 mWindowAttributesChanged = true; 483 mWindowAttributesChangesFlag = WindowManager.LayoutParams.EVERYTHING_CHANGED; 484 mAttachInfo.mRootView = view; 485 mAttachInfo.mScalingRequired = mTranslator != null; 486 mAttachInfo.mApplicationScale = 487 mTranslator == null ? 1.0f : mTranslator.applicationScale; 488 if (panelParentView != null) { 489 mAttachInfo.mPanelParentWindowToken 490 = panelParentView.getApplicationWindowToken(); 491 } 492 mAdded = true; 493 int res; /* = WindowManagerImpl.ADD_OKAY; */ 494 495 // Schedule the first layout -before- adding to the window 496 // manager, to make sure we do the relayout before receiving 497 // any other events from the system. 498 requestLayout(); 499 if ((mWindowAttributes.inputFeatures 500 & WindowManager.LayoutParams.INPUT_FEATURE_NO_INPUT_CHANNEL) == 0) { 501 mInputChannel = new InputChannel(); 502 } 503 try { 504 mOrigWindowType = mWindowAttributes.type; 505 mAttachInfo.mRecomputeGlobalAttributes = true; 506 collectViewAttributes(); 507 res = mWindowSession.addToDisplay(mWindow, mSeq, mWindowAttributes, 508 getHostVisibility(), mDisplay.getDisplayId(), 509 mAttachInfo.mContentInsets, mInputChannel); 510 } catch (RemoteException e) { 511 mAdded = false; 512 mView = null; 513 mAttachInfo.mRootView = null; 514 mInputChannel = null; 515 mFallbackEventHandler.setView(null); 516 unscheduleTraversals(); 517 setAccessibilityFocus(null, null); 518 throw new RuntimeException("Adding window failed", e); 519 } finally { 520 if (restore) { 521 attrs.restore(); 522 } 523 } 524 525 if (mTranslator != null) { 526 mTranslator.translateRectInScreenToAppWindow(mAttachInfo.mContentInsets); 527 } 528 mPendingOverscanInsets.set(0, 0, 0, 0); 529 mPendingContentInsets.set(mAttachInfo.mContentInsets); 530 mPendingVisibleInsets.set(0, 0, 0, 0); 531 if (DEBUG_LAYOUT) Log.v(TAG, "Added window " + mWindow); 532 if (res < WindowManagerGlobal.ADD_OKAY) { 533 mAttachInfo.mRootView = null; 534 mAdded = false; 535 mFallbackEventHandler.setView(null); 536 unscheduleTraversals(); 537 setAccessibilityFocus(null, null); 538 switch (res) { 539 case WindowManagerGlobal.ADD_BAD_APP_TOKEN: 540 case WindowManagerGlobal.ADD_BAD_SUBWINDOW_TOKEN: 541 throw new WindowManager.BadTokenException( 542 "Unable to add window -- token " + attrs.token 543 + " is not valid; is your activity running?"); 544 case WindowManagerGlobal.ADD_NOT_APP_TOKEN: 545 throw new WindowManager.BadTokenException( 546 "Unable to add window -- token " + attrs.token 547 + " is not for an application"); 548 case WindowManagerGlobal.ADD_APP_EXITING: 549 throw new WindowManager.BadTokenException( 550 "Unable to add window -- app for token " + attrs.token 551 + " is exiting"); 552 case WindowManagerGlobal.ADD_DUPLICATE_ADD: 553 throw new WindowManager.BadTokenException( 554 "Unable to add window -- window " + mWindow 555 + " has already been added"); 556 case WindowManagerGlobal.ADD_STARTING_NOT_NEEDED: 557 // Silently ignore -- we would have just removed it 558 // right away, anyway. 559 return; 560 case WindowManagerGlobal.ADD_MULTIPLE_SINGLETON: 561 throw new WindowManager.BadTokenException( 562 "Unable to add window " + mWindow + 563 " -- another window of this type already exists"); 564 case WindowManagerGlobal.ADD_PERMISSION_DENIED: 565 throw new WindowManager.BadTokenException( 566 "Unable to add window " + mWindow + 567 " -- permission denied for this window type"); 568 case WindowManagerGlobal.ADD_INVALID_DISPLAY: 569 throw new WindowManager.InvalidDisplayException( 570 "Unable to add window " + mWindow + 571 " -- the specified display can not be found"); 572 } 573 throw new RuntimeException( 574 "Unable to add window -- unknown error code " + res); 575 } 576 577 if (view instanceof RootViewSurfaceTaker) { 578 mInputQueueCallback = 579 ((RootViewSurfaceTaker)view).willYouTakeTheInputQueue(); 580 } 581 if (mInputChannel != null) { 582 if (mInputQueueCallback != null) { 583 mInputQueue = new InputQueue(); 584 mInputQueueCallback.onInputQueueCreated(mInputQueue); 585 } 586 mInputEventReceiver = new WindowInputEventReceiver(mInputChannel, 587 Looper.myLooper()); 588 } 589 590 view.assignParent(this); 591 mAddedTouchMode = (res & WindowManagerGlobal.ADD_FLAG_IN_TOUCH_MODE) != 0; 592 mAppVisible = (res & WindowManagerGlobal.ADD_FLAG_APP_VISIBLE) != 0; 593 594 if (mAccessibilityManager.isEnabled()) { 595 mAccessibilityInteractionConnectionManager.ensureConnection(); 596 } 597 598 if (view.getImportantForAccessibility() == View.IMPORTANT_FOR_ACCESSIBILITY_AUTO) { 599 view.setImportantForAccessibility(View.IMPORTANT_FOR_ACCESSIBILITY_YES); 600 } 601 602 // Set up the input pipeline. 603 CharSequence counterSuffix = attrs.getTitle(); 604 mSyntheticInputStage = new SyntheticInputStage(); 605 InputStage viewPostImeStage = new ViewPostImeInputStage(mSyntheticInputStage); 606 InputStage nativePostImeStage = new NativePostImeInputStage(viewPostImeStage, 607 "aq:native-post-ime:" + counterSuffix); 608 InputStage earlyPostImeStage = new EarlyPostImeInputStage(nativePostImeStage); 609 InputStage imeStage = new ImeInputStage(earlyPostImeStage, 610 "aq:ime:" + counterSuffix); 611 InputStage viewPreImeStage = new ViewPreImeInputStage(imeStage); 612 InputStage nativePreImeStage = new NativePreImeInputStage(viewPreImeStage, 613 "aq:native-pre-ime:" + counterSuffix); 614 615 mFirstInputStage = nativePreImeStage; 616 mFirstPostImeInputStage = earlyPostImeStage; 617 mPendingInputEventQueueLengthCounterName = "aq:pending:" + counterSuffix; 618 } 619 } 620 } 621 622 /** Whether the window is in local focus mode or not */ 623 private boolean isInLocalFocusMode() { 624 return (mWindowAttributes.flags & WindowManager.LayoutParams.FLAG_LOCAL_FOCUS_MODE) != 0; 625 } 626 627 void destroyHardwareResources() { 628 if (mAttachInfo.mHardwareRenderer != null) { 629 mAttachInfo.mHardwareRenderer.destroyHardwareResources(mView); 630 mAttachInfo.mHardwareRenderer.destroy(false); 631 } 632 } 633 634 void destroyHardwareLayers() { 635 if (mThread != Thread.currentThread()) { 636 if (mAttachInfo.mHardwareRenderer != null && 637 mAttachInfo.mHardwareRenderer.isEnabled()) { 638 HardwareRenderer.trimMemory(ComponentCallbacks2.TRIM_MEMORY_MODERATE); 639 } 640 } else { 641 destroyHardwareLayer(mView); 642 } 643 } 644 645 private static void destroyHardwareLayer(View view) { 646 view.destroyLayer(true); 647 648 if (view instanceof ViewGroup) { 649 ViewGroup group = (ViewGroup) view; 650 651 int count = group.getChildCount(); 652 for (int i = 0; i < count; i++) { 653 destroyHardwareLayer(group.getChildAt(i)); 654 } 655 } 656 } 657 658 void flushHardwareLayerUpdates() { 659 if (mAttachInfo.mHardwareRenderer != null && mAttachInfo.mHardwareRenderer.isEnabled()) { 660 mAttachInfo.mHardwareRenderer.flushLayerUpdates(); 661 } 662 } 663 664 void dispatchFlushHardwareLayerUpdates() { 665 mHandler.removeMessages(MSG_FLUSH_LAYER_UPDATES); 666 mHandler.sendMessageAtFrontOfQueue(mHandler.obtainMessage(MSG_FLUSH_LAYER_UPDATES)); 667 } 668 669 public void detachFunctor(long functor) { 670 // TODO: Make the resize buffer some other way to not need this block 671 mBlockResizeBuffer = true; 672 } 673 674 public boolean invokeFunctor(long functor, boolean waitForCompletion) { 675 if (mAttachInfo.mHardwareRenderer == null || !mAttachInfo.mHardwareRenderer.isEnabled()) { 676 return false; 677 } 678 mAttachInfo.mHardwareRenderer.invokeFunctor(functor, waitForCompletion); 679 return true; 680 } 681 682 private void enableHardwareAcceleration(WindowManager.LayoutParams attrs) { 683 mAttachInfo.mHardwareAccelerated = false; 684 mAttachInfo.mHardwareAccelerationRequested = false; 685 686 // Don't enable hardware acceleration when the application is in compatibility mode 687 if (mTranslator != null) return; 688 689 // Try to enable hardware acceleration if requested 690 final boolean hardwareAccelerated = 691 (attrs.flags & WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED) != 0; 692 693 if (hardwareAccelerated) { 694 if (!HardwareRenderer.isAvailable()) { 695 return; 696 } 697 698 // Persistent processes (including the system) should not do 699 // accelerated rendering on low-end devices. In that case, 700 // sRendererDisabled will be set. In addition, the system process 701 // itself should never do accelerated rendering. In that case, both 702 // sRendererDisabled and sSystemRendererDisabled are set. When 703 // sSystemRendererDisabled is set, PRIVATE_FLAG_FORCE_HARDWARE_ACCELERATED 704 // can be used by code on the system process to escape that and enable 705 // HW accelerated drawing. (This is basically for the lock screen.) 706 707 final boolean fakeHwAccelerated = (attrs.privateFlags & 708 WindowManager.LayoutParams.PRIVATE_FLAG_FAKE_HARDWARE_ACCELERATED) != 0; 709 final boolean forceHwAccelerated = (attrs.privateFlags & 710 WindowManager.LayoutParams.PRIVATE_FLAG_FORCE_HARDWARE_ACCELERATED) != 0; 711 712 if (!HardwareRenderer.sRendererDisabled || (HardwareRenderer.sSystemRendererDisabled 713 && forceHwAccelerated)) { 714 if (!HardwareRenderer.sUseRenderThread) { 715 // TODO: Delete 716 // Don't enable hardware acceleration when we're not on the main thread 717 if (!HardwareRenderer.sSystemRendererDisabled && 718 Looper.getMainLooper() != Looper.myLooper()) { 719 Log.w(HardwareRenderer.LOG_TAG, "Attempting to initialize hardware " 720 + "acceleration outside of the main thread, aborting"); 721 return; 722 } 723 } 724 725 if (mAttachInfo.mHardwareRenderer != null) { 726 mAttachInfo.mHardwareRenderer.destroy(true); 727 } 728 729 final boolean translucent = attrs.format != PixelFormat.OPAQUE; 730 mAttachInfo.mHardwareRenderer = HardwareRenderer.create(translucent); 731 if (mAttachInfo.mHardwareRenderer != null) { 732 mAttachInfo.mHardwareRenderer.setName(attrs.getTitle().toString()); 733 mAttachInfo.mHardwareAccelerated = 734 mAttachInfo.mHardwareAccelerationRequested = true; 735 } 736 } else if (fakeHwAccelerated) { 737 // The window had wanted to use hardware acceleration, but this 738 // is not allowed in its process. By setting this flag, it can 739 // still render as if it was accelerated. This is basically for 740 // the preview windows the window manager shows for launching 741 // applications, so they will look more like the app being launched. 742 mAttachInfo.mHardwareAccelerationRequested = true; 743 } 744 } 745 } 746 747 public View getView() { 748 return mView; 749 } 750 751 final WindowLeaked getLocation() { 752 return mLocation; 753 } 754 755 void setLayoutParams(WindowManager.LayoutParams attrs, boolean newView) { 756 synchronized (this) { 757 int oldSoftInputMode = mWindowAttributes.softInputMode; 758 // Keep track of the actual window flags supplied by the client. 759 mClientWindowLayoutFlags = attrs.flags; 760 // preserve compatible window flag if exists. 761 int compatibleWindowFlag = mWindowAttributes.privateFlags 762 & WindowManager.LayoutParams.PRIVATE_FLAG_COMPATIBLE_WINDOW; 763 // transfer over system UI visibility values as they carry current state. 764 attrs.systemUiVisibility = mWindowAttributes.systemUiVisibility; 765 attrs.subtreeSystemUiVisibility = mWindowAttributes.subtreeSystemUiVisibility; 766 mWindowAttributesChangesFlag = mWindowAttributes.copyFrom(attrs); 767 if ((mWindowAttributesChangesFlag 768 & WindowManager.LayoutParams.TRANSLUCENT_FLAGS_CHANGED) != 0) { 769 // Recompute system ui visibility. 770 mAttachInfo.mRecomputeGlobalAttributes = true; 771 } 772 if (mWindowAttributes.packageName == null) { 773 mWindowAttributes.packageName = mBasePackageName; 774 } 775 mWindowAttributes.privateFlags |= compatibleWindowFlag; 776 777 applyKeepScreenOnFlag(mWindowAttributes); 778 779 if (newView) { 780 mSoftInputMode = attrs.softInputMode; 781 requestLayout(); 782 } 783 // Don't lose the mode we last auto-computed. 784 if ((attrs.softInputMode&WindowManager.LayoutParams.SOFT_INPUT_MASK_ADJUST) 785 == WindowManager.LayoutParams.SOFT_INPUT_ADJUST_UNSPECIFIED) { 786 mWindowAttributes.softInputMode = (mWindowAttributes.softInputMode 787 & ~WindowManager.LayoutParams.SOFT_INPUT_MASK_ADJUST) 788 | (oldSoftInputMode 789 & WindowManager.LayoutParams.SOFT_INPUT_MASK_ADJUST); 790 } 791 mWindowAttributesChanged = true; 792 scheduleTraversals(); 793 } 794 } 795 796 void handleAppVisibility(boolean visible) { 797 if (mAppVisible != visible) { 798 mAppVisible = visible; 799 scheduleTraversals(); 800 } 801 } 802 803 void handleGetNewSurface() { 804 mNewSurfaceNeeded = true; 805 mFullRedrawNeeded = true; 806 scheduleTraversals(); 807 } 808 809 private final DisplayListener mDisplayListener = new DisplayListener() { 810 @Override 811 public void onDisplayChanged(int displayId) { 812 if (mView != null && mDisplay.getDisplayId() == displayId) { 813 final int oldDisplayState = mAttachInfo.mDisplayState; 814 final int newDisplayState = mDisplay.getState(); 815 if (oldDisplayState != newDisplayState) { 816 mAttachInfo.mDisplayState = newDisplayState; 817 if (oldDisplayState != Display.STATE_UNKNOWN) { 818 final int oldScreenState = toViewScreenState(oldDisplayState); 819 final int newScreenState = toViewScreenState(newDisplayState); 820 if (oldScreenState != newScreenState) { 821 mView.dispatchScreenStateChanged(newScreenState); 822 } 823 if (oldDisplayState == Display.STATE_OFF) { 824 // Draw was suppressed so we need to for it to happen here. 825 mFullRedrawNeeded = true; 826 scheduleTraversals(); 827 } 828 } 829 } 830 } 831 } 832 833 @Override 834 public void onDisplayRemoved(int displayId) { 835 } 836 837 @Override 838 public void onDisplayAdded(int displayId) { 839 } 840 841 private int toViewScreenState(int displayState) { 842 return displayState == Display.STATE_OFF ? 843 View.SCREEN_STATE_OFF : View.SCREEN_STATE_ON; 844 } 845 }; 846 847 @Override 848 public void requestFitSystemWindows() { 849 checkThread(); 850 mFitSystemWindowsRequested = true; 851 scheduleTraversals(); 852 } 853 854 @Override 855 public void requestLayout() { 856 if (!mHandlingLayoutInLayoutRequest) { 857 checkThread(); 858 mLayoutRequested = true; 859 scheduleTraversals(); 860 } 861 } 862 863 @Override 864 public boolean isLayoutRequested() { 865 return mLayoutRequested; 866 } 867 868 void invalidate() { 869 mDirty.set(0, 0, mWidth, mHeight); 870 scheduleTraversals(); 871 } 872 873 void invalidateWorld(View view) { 874 view.invalidate(); 875 if (view instanceof ViewGroup) { 876 ViewGroup parent = (ViewGroup) view; 877 for (int i = 0; i < parent.getChildCount(); i++) { 878 invalidateWorld(parent.getChildAt(i)); 879 } 880 } 881 } 882 883 @Override 884 public void invalidateChild(View child, Rect dirty) { 885 invalidateChildInParent(null, dirty); 886 } 887 888 @Override 889 public ViewParent invalidateChildInParent(int[] location, Rect dirty) { 890 checkThread(); 891 if (DEBUG_DRAW) Log.v(TAG, "Invalidate child: " + dirty); 892 893 if (dirty == null) { 894 invalidate(); 895 return null; 896 } else if (dirty.isEmpty() && !mIsAnimating) { 897 return null; 898 } 899 900 if (mCurScrollY != 0 || mTranslator != null) { 901 mTempRect.set(dirty); 902 dirty = mTempRect; 903 if (mCurScrollY != 0) { 904 dirty.offset(0, -mCurScrollY); 905 } 906 if (mTranslator != null) { 907 mTranslator.translateRectInAppWindowToScreen(dirty); 908 } 909 if (mAttachInfo.mScalingRequired) { 910 dirty.inset(-1, -1); 911 } 912 } 913 914 final Rect localDirty = mDirty; 915 if (!localDirty.isEmpty() && !localDirty.contains(dirty)) { 916 mAttachInfo.mSetIgnoreDirtyState = true; 917 mAttachInfo.mIgnoreDirtyState = true; 918 } 919 920 // Add the new dirty rect to the current one 921 localDirty.union(dirty.left, dirty.top, dirty.right, dirty.bottom); 922 // Intersect with the bounds of the window to skip 923 // updates that lie outside of the visible region 924 final float appScale = mAttachInfo.mApplicationScale; 925 final boolean intersected = localDirty.intersect(0, 0, 926 (int) (mWidth * appScale + 0.5f), (int) (mHeight * appScale + 0.5f)); 927 if (!intersected) { 928 localDirty.setEmpty(); 929 } 930 if (!mWillDrawSoon && (intersected || mIsAnimating)) { 931 scheduleTraversals(); 932 } 933 934 return null; 935 } 936 937 void setStopped(boolean stopped) { 938 if (mStopped != stopped) { 939 mStopped = stopped; 940 if (!stopped) { 941 scheduleTraversals(); 942 } 943 } 944 } 945 946 @Override 947 public ViewParent getParent() { 948 return null; 949 } 950 951 @Override 952 public boolean getChildVisibleRect(View child, Rect r, android.graphics.Point offset) { 953 if (child != mView) { 954 throw new RuntimeException("child is not mine, honest!"); 955 } 956 // Note: don't apply scroll offset, because we want to know its 957 // visibility in the virtual canvas being given to the view hierarchy. 958 return r.intersect(0, 0, mWidth, mHeight); 959 } 960 961 @Override 962 public void bringChildToFront(View child) { 963 } 964 965 int getHostVisibility() { 966 return mAppVisible ? mView.getVisibility() : View.GONE; 967 } 968 969 void disposeResizeBuffer() { 970 if (mResizeBuffer != null) { 971 mResizeBuffer.destroy(); 972 mResizeBuffer = null; 973 } 974 } 975 976 /** 977 * Add LayoutTransition to the list of transitions to be started in the next traversal. 978 * This list will be cleared after the transitions on the list are start()'ed. These 979 * transitionsa re added by LayoutTransition itself when it sets up animations. The setup 980 * happens during the layout phase of traversal, which we want to complete before any of the 981 * animations are started (because those animations may side-effect properties that layout 982 * depends upon, like the bounding rectangles of the affected views). So we add the transition 983 * to the list and it is started just prior to starting the drawing phase of traversal. 984 * 985 * @param transition The LayoutTransition to be started on the next traversal. 986 * 987 * @hide 988 */ 989 public void requestTransitionStart(LayoutTransition transition) { 990 if (mPendingTransitions == null || !mPendingTransitions.contains(transition)) { 991 if (mPendingTransitions == null) { 992 mPendingTransitions = new ArrayList<LayoutTransition>(); 993 } 994 mPendingTransitions.add(transition); 995 } 996 } 997 998 void scheduleTraversals() { 999 if (!mTraversalScheduled) { 1000 mTraversalScheduled = true; 1001 mTraversalBarrier = mHandler.getLooper().postSyncBarrier(); 1002 mChoreographer.postCallback( 1003 Choreographer.CALLBACK_TRAVERSAL, mTraversalRunnable, null); 1004 scheduleConsumeBatchedInput(); 1005 } 1006 } 1007 1008 void unscheduleTraversals() { 1009 if (mTraversalScheduled) { 1010 mTraversalScheduled = false; 1011 mHandler.getLooper().removeSyncBarrier(mTraversalBarrier); 1012 mChoreographer.removeCallbacks( 1013 Choreographer.CALLBACK_TRAVERSAL, mTraversalRunnable, null); 1014 } 1015 } 1016 1017 void doTraversal() { 1018 if (mTraversalScheduled) { 1019 mTraversalScheduled = false; 1020 mHandler.getLooper().removeSyncBarrier(mTraversalBarrier); 1021 1022 if (mProfile) { 1023 Debug.startMethodTracing("ViewAncestor"); 1024 } 1025 1026 Trace.traceBegin(Trace.TRACE_TAG_VIEW, "performTraversals"); 1027 try { 1028 performTraversals(); 1029 } finally { 1030 Trace.traceEnd(Trace.TRACE_TAG_VIEW); 1031 } 1032 1033 if (mProfile) { 1034 Debug.stopMethodTracing(); 1035 mProfile = false; 1036 } 1037 } 1038 } 1039 1040 private void applyKeepScreenOnFlag(WindowManager.LayoutParams params) { 1041 // Update window's global keep screen on flag: if a view has requested 1042 // that the screen be kept on, then it is always set; otherwise, it is 1043 // set to whatever the client last requested for the global state. 1044 if (mAttachInfo.mKeepScreenOn) { 1045 params.flags |= WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON; 1046 } else { 1047 params.flags = (params.flags&~WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON) 1048 | (mClientWindowLayoutFlags&WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); 1049 } 1050 } 1051 1052 private boolean collectViewAttributes() { 1053 final View.AttachInfo attachInfo = mAttachInfo; 1054 if (attachInfo.mRecomputeGlobalAttributes) { 1055 //Log.i(TAG, "Computing view hierarchy attributes!"); 1056 attachInfo.mRecomputeGlobalAttributes = false; 1057 boolean oldScreenOn = attachInfo.mKeepScreenOn; 1058 attachInfo.mKeepScreenOn = false; 1059 attachInfo.mSystemUiVisibility = 0; 1060 attachInfo.mHasSystemUiListeners = false; 1061 mView.dispatchCollectViewAttributes(attachInfo, 0); 1062 attachInfo.mSystemUiVisibility &= ~attachInfo.mDisabledSystemUiVisibility; 1063 WindowManager.LayoutParams params = mWindowAttributes; 1064 attachInfo.mSystemUiVisibility |= getImpliedSystemUiVisibility(params); 1065 if (attachInfo.mKeepScreenOn != oldScreenOn 1066 || attachInfo.mSystemUiVisibility != params.subtreeSystemUiVisibility 1067 || attachInfo.mHasSystemUiListeners != params.hasSystemUiListeners) { 1068 applyKeepScreenOnFlag(params); 1069 params.subtreeSystemUiVisibility = attachInfo.mSystemUiVisibility; 1070 params.hasSystemUiListeners = attachInfo.mHasSystemUiListeners; 1071 mView.dispatchWindowSystemUiVisiblityChanged(attachInfo.mSystemUiVisibility); 1072 return true; 1073 } 1074 } 1075 return false; 1076 } 1077 1078 private int getImpliedSystemUiVisibility(WindowManager.LayoutParams params) { 1079 int vis = 0; 1080 // Translucent decor window flags imply stable system ui visibility. 1081 if ((params.flags & WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS) != 0) { 1082 vis |= View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN; 1083 } 1084 if ((params.flags & WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION) != 0) { 1085 vis |= View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION; 1086 } 1087 return vis; 1088 } 1089 1090 private boolean measureHierarchy(final View host, final WindowManager.LayoutParams lp, 1091 final Resources res, final int desiredWindowWidth, final int desiredWindowHeight) { 1092 int childWidthMeasureSpec; 1093 int childHeightMeasureSpec; 1094 boolean windowSizeMayChange = false; 1095 1096 if (DEBUG_ORIENTATION || DEBUG_LAYOUT) Log.v(TAG, 1097 "Measuring " + host + " in display " + desiredWindowWidth 1098 + "x" + desiredWindowHeight + "..."); 1099 1100 boolean goodMeasure = false; 1101 if (lp.width == ViewGroup.LayoutParams.WRAP_CONTENT) { 1102 // On large screens, we don't want to allow dialogs to just 1103 // stretch to fill the entire width of the screen to display 1104 // one line of text. First try doing the layout at a smaller 1105 // size to see if it will fit. 1106 final DisplayMetrics packageMetrics = res.getDisplayMetrics(); 1107 res.getValue(com.android.internal.R.dimen.config_prefDialogWidth, mTmpValue, true); 1108 int baseSize = 0; 1109 if (mTmpValue.type == TypedValue.TYPE_DIMENSION) { 1110 baseSize = (int)mTmpValue.getDimension(packageMetrics); 1111 } 1112 if (DEBUG_DIALOG) Log.v(TAG, "Window " + mView + ": baseSize=" + baseSize); 1113 if (baseSize != 0 && desiredWindowWidth > baseSize) { 1114 childWidthMeasureSpec = getRootMeasureSpec(baseSize, lp.width); 1115 childHeightMeasureSpec = getRootMeasureSpec(desiredWindowHeight, lp.height); 1116 performMeasure(childWidthMeasureSpec, childHeightMeasureSpec); 1117 if (DEBUG_DIALOG) Log.v(TAG, "Window " + mView + ": measured (" 1118 + host.getMeasuredWidth() + "," + host.getMeasuredHeight() + ")"); 1119 if ((host.getMeasuredWidthAndState()&View.MEASURED_STATE_TOO_SMALL) == 0) { 1120 goodMeasure = true; 1121 } else { 1122 // Didn't fit in that size... try expanding a bit. 1123 baseSize = (baseSize+desiredWindowWidth)/2; 1124 if (DEBUG_DIALOG) Log.v(TAG, "Window " + mView + ": next baseSize=" 1125 + baseSize); 1126 childWidthMeasureSpec = getRootMeasureSpec(baseSize, lp.width); 1127 performMeasure(childWidthMeasureSpec, childHeightMeasureSpec); 1128 if (DEBUG_DIALOG) Log.v(TAG, "Window " + mView + ": measured (" 1129 + host.getMeasuredWidth() + "," + host.getMeasuredHeight() + ")"); 1130 if ((host.getMeasuredWidthAndState()&View.MEASURED_STATE_TOO_SMALL) == 0) { 1131 if (DEBUG_DIALOG) Log.v(TAG, "Good!"); 1132 goodMeasure = true; 1133 } 1134 } 1135 } 1136 } 1137 1138 if (!goodMeasure) { 1139 childWidthMeasureSpec = getRootMeasureSpec(desiredWindowWidth, lp.width); 1140 childHeightMeasureSpec = getRootMeasureSpec(desiredWindowHeight, lp.height); 1141 performMeasure(childWidthMeasureSpec, childHeightMeasureSpec); 1142 if (mWidth != host.getMeasuredWidth() || mHeight != host.getMeasuredHeight()) { 1143 windowSizeMayChange = true; 1144 } 1145 } 1146 1147 if (DBG) { 1148 System.out.println("======================================"); 1149 System.out.println("performTraversals -- after measure"); 1150 host.debug(); 1151 } 1152 1153 return windowSizeMayChange; 1154 } 1155 1156 /** 1157 * Modifies the input matrix such that it maps view-local coordinates to 1158 * on-screen coordinates. 1159 * 1160 * @param m input matrix to modify 1161 */ 1162 void transformMatrixToGlobal(Matrix m) { 1163 final View.AttachInfo attachInfo = mAttachInfo; 1164 m.postTranslate(attachInfo.mWindowLeft, attachInfo.mWindowTop); 1165 } 1166 1167 /** 1168 * Modifies the input matrix such that it maps on-screen coordinates to 1169 * view-local coordinates. 1170 * 1171 * @param m input matrix to modify 1172 */ 1173 void transformMatrixToLocal(Matrix m) { 1174 final View.AttachInfo attachInfo = mAttachInfo; 1175 m.preTranslate(-attachInfo.mWindowLeft, -attachInfo.mWindowTop); 1176 } 1177 1178 void dispatchApplyInsets(View host) { 1179 mFitSystemWindowsInsets.set(mAttachInfo.mContentInsets); 1180 boolean isRound = false; 1181 if ((mWindowAttributes.flags & WindowManager.LayoutParams.FLAG_LAYOUT_IN_OVERSCAN) != 0 1182 && mDisplay.getDisplayId() == 0) { 1183 // we're fullscreen and not hosted in an ActivityView 1184 isRound = mContext.getResources().getBoolean( 1185 com.android.internal.R.bool.config_windowIsRound); 1186 } 1187 host.dispatchApplyWindowInsets(new WindowInsets( 1188 mFitSystemWindowsInsets, isRound)); 1189 } 1190 1191 private void performTraversals() { 1192 // cache mView since it is used so much below... 1193 final View host = mView; 1194 1195 if (DBG) { 1196 System.out.println("======================================"); 1197 System.out.println("performTraversals"); 1198 host.debug(); 1199 } 1200 1201 if (host == null || !mAdded) 1202 return; 1203 1204 mIsInTraversal = true; 1205 mWillDrawSoon = true; 1206 boolean windowSizeMayChange = false; 1207 boolean newSurface = false; 1208 boolean surfaceChanged = false; 1209 WindowManager.LayoutParams lp = mWindowAttributes; 1210 1211 int desiredWindowWidth; 1212 int desiredWindowHeight; 1213 1214 final View.AttachInfo attachInfo = mAttachInfo; 1215 1216 final int viewVisibility = getHostVisibility(); 1217 boolean viewVisibilityChanged = mViewVisibility != viewVisibility 1218 || mNewSurfaceNeeded; 1219 1220 WindowManager.LayoutParams params = null; 1221 if (mWindowAttributesChanged) { 1222 mWindowAttributesChanged = false; 1223 surfaceChanged = true; 1224 params = lp; 1225 } 1226 CompatibilityInfo compatibilityInfo = mDisplayAdjustments.getCompatibilityInfo(); 1227 if (compatibilityInfo.supportsScreen() == mLastInCompatMode) { 1228 params = lp; 1229 mFullRedrawNeeded = true; 1230 mLayoutRequested = true; 1231 if (mLastInCompatMode) { 1232 params.privateFlags &= ~WindowManager.LayoutParams.PRIVATE_FLAG_COMPATIBLE_WINDOW; 1233 mLastInCompatMode = false; 1234 } else { 1235 params.privateFlags |= WindowManager.LayoutParams.PRIVATE_FLAG_COMPATIBLE_WINDOW; 1236 mLastInCompatMode = true; 1237 } 1238 } 1239 1240 mWindowAttributesChangesFlag = 0; 1241 1242 Rect frame = mWinFrame; 1243 if (mFirst) { 1244 mFullRedrawNeeded = true; 1245 mLayoutRequested = true; 1246 1247 if (lp.type == WindowManager.LayoutParams.TYPE_STATUS_BAR_PANEL 1248 || lp.type == WindowManager.LayoutParams.TYPE_INPUT_METHOD) { 1249 // NOTE -- system code, won't try to do compat mode. 1250 Point size = new Point(); 1251 mDisplay.getRealSize(size); 1252 desiredWindowWidth = size.x; 1253 desiredWindowHeight = size.y; 1254 } else { 1255 DisplayMetrics packageMetrics = 1256 mView.getContext().getResources().getDisplayMetrics(); 1257 desiredWindowWidth = packageMetrics.widthPixels; 1258 desiredWindowHeight = packageMetrics.heightPixels; 1259 } 1260 1261 // We used to use the following condition to choose 32 bits drawing caches: 1262 // PixelFormat.hasAlpha(lp.format) || lp.format == PixelFormat.RGBX_8888 1263 // However, windows are now always 32 bits by default, so choose 32 bits 1264 attachInfo.mUse32BitDrawingCache = true; 1265 attachInfo.mHasWindowFocus = false; 1266 attachInfo.mWindowVisibility = viewVisibility; 1267 attachInfo.mRecomputeGlobalAttributes = false; 1268 viewVisibilityChanged = false; 1269 mLastConfiguration.setTo(host.getResources().getConfiguration()); 1270 mLastSystemUiVisibility = mAttachInfo.mSystemUiVisibility; 1271 // Set the layout direction if it has not been set before (inherit is the default) 1272 if (mViewLayoutDirectionInitial == View.LAYOUT_DIRECTION_INHERIT) { 1273 host.setLayoutDirection(mLastConfiguration.getLayoutDirection()); 1274 } 1275 host.dispatchAttachedToWindow(attachInfo, 0); 1276 attachInfo.mTreeObserver.dispatchOnWindowAttachedChange(true); 1277 dispatchApplyInsets(host); 1278 //Log.i(TAG, "Screen on initialized: " + attachInfo.mKeepScreenOn); 1279 1280 } else { 1281 desiredWindowWidth = frame.width(); 1282 desiredWindowHeight = frame.height(); 1283 if (desiredWindowWidth != mWidth || desiredWindowHeight != mHeight) { 1284 if (DEBUG_ORIENTATION) Log.v(TAG, 1285 "View " + host + " resized to: " + frame); 1286 mFullRedrawNeeded = true; 1287 mLayoutRequested = true; 1288 windowSizeMayChange = true; 1289 } 1290 } 1291 1292 if (viewVisibilityChanged) { 1293 attachInfo.mWindowVisibility = viewVisibility; 1294 host.dispatchWindowVisibilityChanged(viewVisibility); 1295 if (viewVisibility != View.VISIBLE || mNewSurfaceNeeded) { 1296 destroyHardwareResources(); 1297 } 1298 if (viewVisibility == View.GONE) { 1299 // After making a window gone, we will count it as being 1300 // shown for the first time the next time it gets focus. 1301 mHasHadWindowFocus = false; 1302 } 1303 } 1304 1305 // Execute enqueued actions on every traversal in case a detached view enqueued an action 1306 getRunQueue().executeActions(attachInfo.mHandler); 1307 1308 boolean insetsChanged = false; 1309 1310 boolean layoutRequested = mLayoutRequested && !mStopped; 1311 if (layoutRequested) { 1312 1313 final Resources res = mView.getContext().getResources(); 1314 1315 if (mFirst) { 1316 // make sure touch mode code executes by setting cached value 1317 // to opposite of the added touch mode. 1318 mAttachInfo.mInTouchMode = !mAddedTouchMode; 1319 ensureTouchModeLocally(mAddedTouchMode); 1320 } else { 1321 if (!mPendingOverscanInsets.equals(mAttachInfo.mOverscanInsets)) { 1322 insetsChanged = true; 1323 } 1324 if (!mPendingContentInsets.equals(mAttachInfo.mContentInsets)) { 1325 insetsChanged = true; 1326 } 1327 if (!mPendingVisibleInsets.equals(mAttachInfo.mVisibleInsets)) { 1328 mAttachInfo.mVisibleInsets.set(mPendingVisibleInsets); 1329 if (DEBUG_LAYOUT) Log.v(TAG, "Visible insets changing to: " 1330 + mAttachInfo.mVisibleInsets); 1331 } 1332 if (lp.width == ViewGroup.LayoutParams.WRAP_CONTENT 1333 || lp.height == ViewGroup.LayoutParams.WRAP_CONTENT) { 1334 windowSizeMayChange = true; 1335 1336 if (lp.type == WindowManager.LayoutParams.TYPE_STATUS_BAR_PANEL 1337 || lp.type == WindowManager.LayoutParams.TYPE_INPUT_METHOD) { 1338 // NOTE -- system code, won't try to do compat mode. 1339 Point size = new Point(); 1340 mDisplay.getRealSize(size); 1341 desiredWindowWidth = size.x; 1342 desiredWindowHeight = size.y; 1343 } else { 1344 DisplayMetrics packageMetrics = res.getDisplayMetrics(); 1345 desiredWindowWidth = packageMetrics.widthPixels; 1346 desiredWindowHeight = packageMetrics.heightPixels; 1347 } 1348 } 1349 } 1350 1351 // Ask host how big it wants to be 1352 windowSizeMayChange |= measureHierarchy(host, lp, res, 1353 desiredWindowWidth, desiredWindowHeight); 1354 } 1355 1356 if (collectViewAttributes()) { 1357 params = lp; 1358 } 1359 if (attachInfo.mForceReportNewAttributes) { 1360 attachInfo.mForceReportNewAttributes = false; 1361 params = lp; 1362 } 1363 1364 if (mFirst || attachInfo.mViewVisibilityChanged) { 1365 attachInfo.mViewVisibilityChanged = false; 1366 int resizeMode = mSoftInputMode & 1367 WindowManager.LayoutParams.SOFT_INPUT_MASK_ADJUST; 1368 // If we are in auto resize mode, then we need to determine 1369 // what mode to use now. 1370 if (resizeMode == WindowManager.LayoutParams.SOFT_INPUT_ADJUST_UNSPECIFIED) { 1371 final int N = attachInfo.mScrollContainers.size(); 1372 for (int i=0; i<N; i++) { 1373 if (attachInfo.mScrollContainers.get(i).isShown()) { 1374 resizeMode = WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE; 1375 } 1376 } 1377 if (resizeMode == 0) { 1378 resizeMode = WindowManager.LayoutParams.SOFT_INPUT_ADJUST_PAN; 1379 } 1380 if ((lp.softInputMode & 1381 WindowManager.LayoutParams.SOFT_INPUT_MASK_ADJUST) != resizeMode) { 1382 lp.softInputMode = (lp.softInputMode & 1383 ~WindowManager.LayoutParams.SOFT_INPUT_MASK_ADJUST) | 1384 resizeMode; 1385 params = lp; 1386 } 1387 } 1388 } 1389 1390 if (params != null) { 1391 if ((host.mPrivateFlags & View.PFLAG_REQUEST_TRANSPARENT_REGIONS) != 0) { 1392 if (!PixelFormat.formatHasAlpha(params.format)) { 1393 params.format = PixelFormat.TRANSLUCENT; 1394 } 1395 } 1396 mAttachInfo.mOverscanRequested = (params.flags 1397 & WindowManager.LayoutParams.FLAG_LAYOUT_IN_OVERSCAN) != 0; 1398 } 1399 1400 if (mFitSystemWindowsRequested) { 1401 mFitSystemWindowsRequested = false; 1402 mLastOverscanRequested = mAttachInfo.mOverscanRequested; 1403 dispatchApplyInsets(host); 1404 if (mLayoutRequested) { 1405 // Short-circuit catching a new layout request here, so 1406 // we don't need to go through two layout passes when things 1407 // change due to fitting system windows, which can happen a lot. 1408 windowSizeMayChange |= measureHierarchy(host, lp, 1409 mView.getContext().getResources(), 1410 desiredWindowWidth, desiredWindowHeight); 1411 } 1412 } 1413 1414 if (layoutRequested) { 1415 // Clear this now, so that if anything requests a layout in the 1416 // rest of this function we will catch it and re-run a full 1417 // layout pass. 1418 mLayoutRequested = false; 1419 } 1420 1421 boolean windowShouldResize = layoutRequested && windowSizeMayChange 1422 && ((mWidth != host.getMeasuredWidth() || mHeight != host.getMeasuredHeight()) 1423 || (lp.width == ViewGroup.LayoutParams.WRAP_CONTENT && 1424 frame.width() < desiredWindowWidth && frame.width() != mWidth) 1425 || (lp.height == ViewGroup.LayoutParams.WRAP_CONTENT && 1426 frame.height() < desiredWindowHeight && frame.height() != mHeight)); 1427 1428 // Determine whether to compute insets. 1429 // If there are no inset listeners remaining then we may still need to compute 1430 // insets in case the old insets were non-empty and must be reset. 1431 final boolean computesInternalInsets = 1432 attachInfo.mTreeObserver.hasComputeInternalInsetsListeners() 1433 || attachInfo.mHasNonEmptyGivenInternalInsets; 1434 1435 boolean insetsPending = false; 1436 int relayoutResult = 0; 1437 1438 if (mFirst || windowShouldResize || insetsChanged || 1439 viewVisibilityChanged || params != null) { 1440 1441 if (viewVisibility == View.VISIBLE) { 1442 // If this window is giving internal insets to the window 1443 // manager, and it is being added or changing its visibility, 1444 // then we want to first give the window manager "fake" 1445 // insets to cause it to effectively ignore the content of 1446 // the window during layout. This avoids it briefly causing 1447 // other windows to resize/move based on the raw frame of the 1448 // window, waiting until we can finish laying out this window 1449 // and get back to the window manager with the ultimately 1450 // computed insets. 1451 insetsPending = computesInternalInsets && (mFirst || viewVisibilityChanged); 1452 } 1453 1454 if (mSurfaceHolder != null) { 1455 mSurfaceHolder.mSurfaceLock.lock(); 1456 mDrawingAllowed = true; 1457 } 1458 1459 boolean hwInitialized = false; 1460 boolean contentInsetsChanged = false; 1461 boolean hadSurface = mSurface.isValid(); 1462 1463 try { 1464 if (DEBUG_LAYOUT) { 1465 Log.i(TAG, "host=w:" + host.getMeasuredWidth() + ", h:" + 1466 host.getMeasuredHeight() + ", params=" + params); 1467 } 1468 1469 if (mAttachInfo.mHardwareRenderer != null) { 1470 // relayoutWindow may decide to destroy mSurface. As that decision 1471 // happens in WindowManager service, we need to be defensive here 1472 // and stop using the surface in case it gets destroyed. 1473 mAttachInfo.mHardwareRenderer.pauseSurface(mSurface); 1474 } 1475 final int surfaceGenerationId = mSurface.getGenerationId(); 1476 relayoutResult = relayoutWindow(params, viewVisibility, insetsPending); 1477 if (!mDrawDuringWindowsAnimating && 1478 (relayoutResult & WindowManagerGlobal.RELAYOUT_RES_ANIMATING) != 0) { 1479 mWindowsAnimating = true; 1480 } 1481 1482 if (DEBUG_LAYOUT) Log.v(TAG, "relayout: frame=" + frame.toShortString() 1483 + " overscan=" + mPendingOverscanInsets.toShortString() 1484 + " content=" + mPendingContentInsets.toShortString() 1485 + " visible=" + mPendingVisibleInsets.toShortString() 1486 + " surface=" + mSurface); 1487 1488 if (mPendingConfiguration.seq != 0) { 1489 if (DEBUG_CONFIGURATION) Log.v(TAG, "Visible with new config: " 1490 + mPendingConfiguration); 1491 updateConfiguration(mPendingConfiguration, !mFirst); 1492 mPendingConfiguration.seq = 0; 1493 } 1494 1495 final boolean overscanInsetsChanged = !mPendingOverscanInsets.equals( 1496 mAttachInfo.mOverscanInsets); 1497 contentInsetsChanged = !mPendingContentInsets.equals( 1498 mAttachInfo.mContentInsets); 1499 final boolean visibleInsetsChanged = !mPendingVisibleInsets.equals( 1500 mAttachInfo.mVisibleInsets); 1501 if (contentInsetsChanged) { 1502 if (mWidth > 0 && mHeight > 0 && lp != null && 1503 ((lp.systemUiVisibility|lp.subtreeSystemUiVisibility) 1504 & View.SYSTEM_UI_LAYOUT_FLAGS) == 0 && 1505 mSurface != null && mSurface.isValid() && 1506 !mAttachInfo.mTurnOffWindowResizeAnim && 1507 mAttachInfo.mHardwareRenderer != null && 1508 mAttachInfo.mHardwareRenderer.isEnabled() && 1509 lp != null && !PixelFormat.formatHasAlpha(lp.format) 1510 && !mBlockResizeBuffer) { 1511 1512 disposeResizeBuffer(); 1513 1514 if (mResizeBuffer == null) { 1515 mResizeBuffer = mAttachInfo.mHardwareRenderer.createDisplayListLayer( 1516 mWidth, mHeight); 1517 } 1518 mResizeBuffer.prepare(mWidth, mHeight, false); 1519 RenderNode layerRenderNode = mResizeBuffer.startRecording(); 1520 HardwareCanvas layerCanvas = layerRenderNode.start(mWidth, mHeight); 1521 try { 1522 final int restoreCount = layerCanvas.save(); 1523 1524 int yoff; 1525 final boolean scrolling = mScroller != null 1526 && mScroller.computeScrollOffset(); 1527 if (scrolling) { 1528 yoff = mScroller.getCurrY(); 1529 mScroller.abortAnimation(); 1530 } else { 1531 yoff = mScrollY; 1532 } 1533 1534 layerCanvas.translate(0, -yoff); 1535 if (mTranslator != null) { 1536 mTranslator.translateCanvas(layerCanvas); 1537 } 1538 1539 RenderNode renderNode = mView.mRenderNode; 1540 if (renderNode != null && renderNode.isValid()) { 1541 layerCanvas.drawDisplayList(renderNode, null, 1542 RenderNode.FLAG_CLIP_CHILDREN); 1543 } else { 1544 mView.draw(layerCanvas); 1545 } 1546 1547 drawAccessibilityFocusedDrawableIfNeeded(layerCanvas); 1548 1549 mResizeBufferStartTime = SystemClock.uptimeMillis(); 1550 mResizeBufferDuration = mView.getResources().getInteger( 1551 com.android.internal.R.integer.config_mediumAnimTime); 1552 1553 layerCanvas.restoreToCount(restoreCount); 1554 layerRenderNode.end(layerCanvas); 1555 layerRenderNode.setCaching(true); 1556 layerRenderNode.setLeftTopRightBottom(0, 0, mWidth, mHeight); 1557 mTempRect.set(0, 0, mWidth, mHeight); 1558 } finally { 1559 mResizeBuffer.endRecording(mTempRect); 1560 } 1561 mAttachInfo.mHardwareRenderer.flushLayerUpdates(); 1562 } 1563 mAttachInfo.mContentInsets.set(mPendingContentInsets); 1564 if (DEBUG_LAYOUT) Log.v(TAG, "Content insets changing to: " 1565 + mAttachInfo.mContentInsets); 1566 } 1567 if (overscanInsetsChanged) { 1568 mAttachInfo.mOverscanInsets.set(mPendingOverscanInsets); 1569 if (DEBUG_LAYOUT) Log.v(TAG, "Overscan insets changing to: " 1570 + mAttachInfo.mOverscanInsets); 1571 // Need to relayout with content insets. 1572 contentInsetsChanged = true; 1573 } 1574 if (contentInsetsChanged || mLastSystemUiVisibility != 1575 mAttachInfo.mSystemUiVisibility || mFitSystemWindowsRequested 1576 || mLastOverscanRequested != mAttachInfo.mOverscanRequested) { 1577 mLastSystemUiVisibility = mAttachInfo.mSystemUiVisibility; 1578 mLastOverscanRequested = mAttachInfo.mOverscanRequested; 1579 mFitSystemWindowsRequested = false; 1580 dispatchApplyInsets(host); 1581 } 1582 if (visibleInsetsChanged) { 1583 mAttachInfo.mVisibleInsets.set(mPendingVisibleInsets); 1584 if (DEBUG_LAYOUT) Log.v(TAG, "Visible insets changing to: " 1585 + mAttachInfo.mVisibleInsets); 1586 } 1587 1588 if (!hadSurface) { 1589 if (mSurface.isValid()) { 1590 // If we are creating a new surface, then we need to 1591 // completely redraw it. Also, when we get to the 1592 // point of drawing it we will hold off and schedule 1593 // a new traversal instead. This is so we can tell the 1594 // window manager about all of the windows being displayed 1595 // before actually drawing them, so it can display then 1596 // all at once. 1597 newSurface = true; 1598 mFullRedrawNeeded = true; 1599 mPreviousTransparentRegion.setEmpty(); 1600 1601 if (mAttachInfo.mHardwareRenderer != null) { 1602 try { 1603 hwInitialized = mAttachInfo.mHardwareRenderer.initialize( 1604 mSurface); 1605 } catch (OutOfResourcesException e) { 1606 handleOutOfResourcesException(e); 1607 return; 1608 } 1609 } 1610 } 1611 } else if (!mSurface.isValid()) { 1612 // If the surface has been removed, then reset the scroll 1613 // positions. 1614 if (mLastScrolledFocus != null) { 1615 mLastScrolledFocus.clear(); 1616 } 1617 mScrollY = mCurScrollY = 0; 1618 if (mScroller != null) { 1619 mScroller.abortAnimation(); 1620 } 1621 disposeResizeBuffer(); 1622 // Our surface is gone 1623 if (mAttachInfo.mHardwareRenderer != null && 1624 mAttachInfo.mHardwareRenderer.isEnabled()) { 1625 mAttachInfo.mHardwareRenderer.destroy(true); 1626 } 1627 } else if (surfaceGenerationId != mSurface.getGenerationId() && 1628 mSurfaceHolder == null && mAttachInfo.mHardwareRenderer != null) { 1629 mFullRedrawNeeded = true; 1630 try { 1631 mAttachInfo.mHardwareRenderer.updateSurface(mSurface); 1632 } catch (OutOfResourcesException e) { 1633 handleOutOfResourcesException(e); 1634 return; 1635 } 1636 } 1637 } catch (RemoteException e) { 1638 } 1639 1640 if (DEBUG_ORIENTATION) Log.v( 1641 TAG, "Relayout returned: frame=" + frame + ", surface=" + mSurface); 1642 1643 attachInfo.mWindowLeft = frame.left; 1644 attachInfo.mWindowTop = frame.top; 1645 1646 // !!FIXME!! This next section handles the case where we did not get the 1647 // window size we asked for. We should avoid this by getting a maximum size from 1648 // the window session beforehand. 1649 if (mWidth != frame.width() || mHeight != frame.height()) { 1650 mWidth = frame.width(); 1651 mHeight = frame.height(); 1652 } 1653 1654 if (mSurfaceHolder != null) { 1655 // The app owns the surface; tell it about what is going on. 1656 if (mSurface.isValid()) { 1657 // XXX .copyFrom() doesn't work! 1658 //mSurfaceHolder.mSurface.copyFrom(mSurface); 1659 mSurfaceHolder.mSurface = mSurface; 1660 } 1661 mSurfaceHolder.setSurfaceFrameSize(mWidth, mHeight); 1662 mSurfaceHolder.mSurfaceLock.unlock(); 1663 if (mSurface.isValid()) { 1664 if (!hadSurface) { 1665 mSurfaceHolder.ungetCallbacks(); 1666 1667 mIsCreating = true; 1668 mSurfaceHolderCallback.surfaceCreated(mSurfaceHolder); 1669 SurfaceHolder.Callback callbacks[] = mSurfaceHolder.getCallbacks(); 1670 if (callbacks != null) { 1671 for (SurfaceHolder.Callback c : callbacks) { 1672 c.surfaceCreated(mSurfaceHolder); 1673 } 1674 } 1675 surfaceChanged = true; 1676 } 1677 if (surfaceChanged) { 1678 mSurfaceHolderCallback.surfaceChanged(mSurfaceHolder, 1679 lp.format, mWidth, mHeight); 1680 SurfaceHolder.Callback callbacks[] = mSurfaceHolder.getCallbacks(); 1681 if (callbacks != null) { 1682 for (SurfaceHolder.Callback c : callbacks) { 1683 c.surfaceChanged(mSurfaceHolder, lp.format, 1684 mWidth, mHeight); 1685 } 1686 } 1687 } 1688 mIsCreating = false; 1689 } else if (hadSurface) { 1690 mSurfaceHolder.ungetCallbacks(); 1691 SurfaceHolder.Callback callbacks[] = mSurfaceHolder.getCallbacks(); 1692 mSurfaceHolderCallback.surfaceDestroyed(mSurfaceHolder); 1693 if (callbacks != null) { 1694 for (SurfaceHolder.Callback c : callbacks) { 1695 c.surfaceDestroyed(mSurfaceHolder); 1696 } 1697 } 1698 mSurfaceHolder.mSurfaceLock.lock(); 1699 try { 1700 mSurfaceHolder.mSurface = new Surface(); 1701 } finally { 1702 mSurfaceHolder.mSurfaceLock.unlock(); 1703 } 1704 } 1705 } 1706 1707 if (mAttachInfo.mHardwareRenderer != null && 1708 mAttachInfo.mHardwareRenderer.isEnabled()) { 1709 if (hwInitialized || 1710 mWidth != mAttachInfo.mHardwareRenderer.getWidth() || 1711 mHeight != mAttachInfo.mHardwareRenderer.getHeight()) { 1712 mAttachInfo.mHardwareRenderer.setup(mWidth, mHeight); 1713 if (!hwInitialized) { 1714 mAttachInfo.mHardwareRenderer.invalidate(mSurface); 1715 mFullRedrawNeeded = true; 1716 } 1717 } 1718 } 1719 1720 if (!mStopped) { 1721 boolean focusChangedDueToTouchMode = ensureTouchModeLocally( 1722 (relayoutResult&WindowManagerGlobal.RELAYOUT_RES_IN_TOUCH_MODE) != 0); 1723 if (focusChangedDueToTouchMode || mWidth != host.getMeasuredWidth() 1724 || mHeight != host.getMeasuredHeight() || contentInsetsChanged) { 1725 int childWidthMeasureSpec = getRootMeasureSpec(mWidth, lp.width); 1726 int childHeightMeasureSpec = getRootMeasureSpec(mHeight, lp.height); 1727 1728 if (DEBUG_LAYOUT) Log.v(TAG, "Ooops, something changed! mWidth=" 1729 + mWidth + " measuredWidth=" + host.getMeasuredWidth() 1730 + " mHeight=" + mHeight 1731 + " measuredHeight=" + host.getMeasuredHeight() 1732 + " coveredInsetsChanged=" + contentInsetsChanged); 1733 1734 // Ask host how big it wants to be 1735 performMeasure(childWidthMeasureSpec, childHeightMeasureSpec); 1736 1737 // Implementation of weights from WindowManager.LayoutParams 1738 // We just grow the dimensions as needed and re-measure if 1739 // needs be 1740 int width = host.getMeasuredWidth(); 1741 int height = host.getMeasuredHeight(); 1742 boolean measureAgain = false; 1743 1744 if (lp.horizontalWeight > 0.0f) { 1745 width += (int) ((mWidth - width) * lp.horizontalWeight); 1746 childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(width, 1747 MeasureSpec.EXACTLY); 1748 measureAgain = true; 1749 } 1750 if (lp.verticalWeight > 0.0f) { 1751 height += (int) ((mHeight - height) * lp.verticalWeight); 1752 childHeightMeasureSpec = MeasureSpec.makeMeasureSpec(height, 1753 MeasureSpec.EXACTLY); 1754 measureAgain = true; 1755 } 1756 1757 if (measureAgain) { 1758 if (DEBUG_LAYOUT) Log.v(TAG, 1759 "And hey let's measure once more: width=" + width 1760 + " height=" + height); 1761 performMeasure(childWidthMeasureSpec, childHeightMeasureSpec); 1762 } 1763 1764 layoutRequested = true; 1765 } 1766 } 1767 } else { 1768 // Not the first pass and no window/insets/visibility change but the window 1769 // may have moved and we need check that and if so to update the left and right 1770 // in the attach info. We translate only the window frame since on window move 1771 // the window manager tells us only for the new frame but the insets are the 1772 // same and we do not want to translate them more than once. 1773 1774 // TODO: Well, we are checking whether the frame has changed similarly 1775 // to how this is done for the insets. This is however incorrect since 1776 // the insets and the frame are translated. For example, the old frame 1777 // was (1, 1 - 1, 1) and was translated to say (2, 2 - 2, 2), now the new 1778 // reported frame is (2, 2 - 2, 2) which implies no change but this is not 1779 // true since we are comparing a not translated value to a translated one. 1780 // This scenario is rare but we may want to fix that. 1781 1782 final boolean windowMoved = (attachInfo.mWindowLeft != frame.left 1783 || attachInfo.mWindowTop != frame.top); 1784 if (windowMoved) { 1785 if (mTranslator != null) { 1786 mTranslator.translateRectInScreenToAppWinFrame(frame); 1787 } 1788 attachInfo.mWindowLeft = frame.left; 1789 attachInfo.mWindowTop = frame.top; 1790 } 1791 } 1792 1793 final boolean didLayout = layoutRequested && !mStopped; 1794 boolean triggerGlobalLayoutListener = didLayout 1795 || attachInfo.mRecomputeGlobalAttributes; 1796 if (didLayout) { 1797 performLayout(lp, desiredWindowWidth, desiredWindowHeight); 1798 1799 // By this point all views have been sized and positioned 1800 // We can compute the transparent area 1801 1802 if ((host.mPrivateFlags & View.PFLAG_REQUEST_TRANSPARENT_REGIONS) != 0) { 1803 // start out transparent 1804 // TODO: AVOID THAT CALL BY CACHING THE RESULT? 1805 host.getLocationInWindow(mTmpLocation); 1806 mTransparentRegion.set(mTmpLocation[0], mTmpLocation[1], 1807 mTmpLocation[0] + host.mRight - host.mLeft, 1808 mTmpLocation[1] + host.mBottom - host.mTop); 1809 1810 host.gatherTransparentRegion(mTransparentRegion); 1811 if (mTranslator != null) { 1812 mTranslator.translateRegionInWindowToScreen(mTransparentRegion); 1813 } 1814 1815 if (!mTransparentRegion.equals(mPreviousTransparentRegion)) { 1816 mPreviousTransparentRegion.set(mTransparentRegion); 1817 mFullRedrawNeeded = true; 1818 // reconfigure window manager 1819 try { 1820 mWindowSession.setTransparentRegion(mWindow, mTransparentRegion); 1821 } catch (RemoteException e) { 1822 } 1823 } 1824 } 1825 1826 if (DBG) { 1827 System.out.println("======================================"); 1828 System.out.println("performTraversals -- after setFrame"); 1829 host.debug(); 1830 } 1831 } 1832 1833 if (triggerGlobalLayoutListener) { 1834 attachInfo.mRecomputeGlobalAttributes = false; 1835 attachInfo.mTreeObserver.dispatchOnGlobalLayout(); 1836 } 1837 1838 if (computesInternalInsets) { 1839 // Clear the original insets. 1840 final ViewTreeObserver.InternalInsetsInfo insets = attachInfo.mGivenInternalInsets; 1841 insets.reset(); 1842 1843 // Compute new insets in place. 1844 attachInfo.mTreeObserver.dispatchOnComputeInternalInsets(insets); 1845 attachInfo.mHasNonEmptyGivenInternalInsets = !insets.isEmpty(); 1846 1847 // Tell the window manager. 1848 if (insetsPending || !mLastGivenInsets.equals(insets)) { 1849 mLastGivenInsets.set(insets); 1850 1851 // Translate insets to screen coordinates if needed. 1852 final Rect contentInsets; 1853 final Rect visibleInsets; 1854 final Region touchableRegion; 1855 if (mTranslator != null) { 1856 contentInsets = mTranslator.getTranslatedContentInsets(insets.contentInsets); 1857 visibleInsets = mTranslator.getTranslatedVisibleInsets(insets.visibleInsets); 1858 touchableRegion = mTranslator.getTranslatedTouchableArea(insets.touchableRegion); 1859 } else { 1860 contentInsets = insets.contentInsets; 1861 visibleInsets = insets.visibleInsets; 1862 touchableRegion = insets.touchableRegion; 1863 } 1864 1865 try { 1866 mWindowSession.setInsets(mWindow, insets.mTouchableInsets, 1867 contentInsets, visibleInsets, touchableRegion); 1868 } catch (RemoteException e) { 1869 } 1870 } 1871 } 1872 1873 boolean skipDraw = false; 1874 1875 if (mFirst) { 1876 // handle first focus request 1877 if (DEBUG_INPUT_RESIZE) Log.v(TAG, "First: mView.hasFocus()=" 1878 + mView.hasFocus()); 1879 if (mView != null) { 1880 if (!mView.hasFocus()) { 1881 mView.requestFocus(View.FOCUS_FORWARD); 1882 if (DEBUG_INPUT_RESIZE) Log.v(TAG, "First: requested focused view=" 1883 + mView.findFocus()); 1884 } else { 1885 if (DEBUG_INPUT_RESIZE) Log.v(TAG, "First: existing focused view=" 1886 + mView.findFocus()); 1887 } 1888 } 1889 if ((relayoutResult & WindowManagerGlobal.RELAYOUT_RES_ANIMATING) != 0) { 1890 // The first time we relayout the window, if the system is 1891 // doing window animations, we want to hold of on any future 1892 // draws until the animation is done. 1893 mWindowsAnimating = true; 1894 } 1895 } else if (mWindowsAnimating) { 1896 skipDraw = true; 1897 } 1898 1899 mFirst = false; 1900 mWillDrawSoon = false; 1901 mNewSurfaceNeeded = false; 1902 mViewVisibility = viewVisibility; 1903 1904 if (mAttachInfo.mHasWindowFocus && !isInLocalFocusMode()) { 1905 final boolean imTarget = WindowManager.LayoutParams 1906 .mayUseInputMethod(mWindowAttributes.flags); 1907 if (imTarget != mLastWasImTarget) { 1908 mLastWasImTarget = imTarget; 1909 InputMethodManager imm = InputMethodManager.peekInstance(); 1910 if (imm != null && imTarget) { 1911 imm.startGettingWindowFocus(mView); 1912 imm.onWindowFocus(mView, mView.findFocus(), 1913 mWindowAttributes.softInputMode, 1914 !mHasHadWindowFocus, mWindowAttributes.flags); 1915 } 1916 } 1917 } 1918 1919 // Remember if we must report the next draw. 1920 if ((relayoutResult & WindowManagerGlobal.RELAYOUT_RES_FIRST_TIME) != 0) { 1921 mReportNextDraw = true; 1922 } 1923 1924 boolean cancelDraw = attachInfo.mTreeObserver.dispatchOnPreDraw() || 1925 viewVisibility != View.VISIBLE; 1926 1927 if (!cancelDraw && !newSurface) { 1928 if (!skipDraw || mReportNextDraw) { 1929 if (mPendingTransitions != null && mPendingTransitions.size() > 0) { 1930 for (int i = 0; i < mPendingTransitions.size(); ++i) { 1931 mPendingTransitions.get(i).startChangingAnimations(); 1932 } 1933 mPendingTransitions.clear(); 1934 } 1935 1936 performDraw(); 1937 } 1938 } else { 1939 if (viewVisibility == View.VISIBLE) { 1940 // Try again 1941 scheduleTraversals(); 1942 } else if (mPendingTransitions != null && mPendingTransitions.size() > 0) { 1943 for (int i = 0; i < mPendingTransitions.size(); ++i) { 1944 mPendingTransitions.get(i).endChangingAnimations(); 1945 } 1946 mPendingTransitions.clear(); 1947 } 1948 } 1949 1950 mIsInTraversal = false; 1951 } 1952 1953 private void handleOutOfResourcesException(Surface.OutOfResourcesException e) { 1954 Log.e(TAG, "OutOfResourcesException initializing HW surface", e); 1955 try { 1956 if (!mWindowSession.outOfMemory(mWindow) && 1957 Process.myUid() != Process.SYSTEM_UID) { 1958 Slog.w(TAG, "No processes killed for memory; killing self"); 1959 Process.killProcess(Process.myPid()); 1960 } 1961 } catch (RemoteException ex) { 1962 } 1963 mLayoutRequested = true; // ask wm for a new surface next time. 1964 } 1965 1966 private void performMeasure(int childWidthMeasureSpec, int childHeightMeasureSpec) { 1967 Trace.traceBegin(Trace.TRACE_TAG_VIEW, "measure"); 1968 try { 1969 mView.measure(childWidthMeasureSpec, childHeightMeasureSpec); 1970 } finally { 1971 Trace.traceEnd(Trace.TRACE_TAG_VIEW); 1972 } 1973 } 1974 1975 /** 1976 * Called by {@link android.view.View#isInLayout()} to determine whether the view hierarchy 1977 * is currently undergoing a layout pass. 1978 * 1979 * @return whether the view hierarchy is currently undergoing a layout pass 1980 */ 1981 boolean isInLayout() { 1982 return mInLayout; 1983 } 1984 1985 /** 1986 * Called by {@link android.view.View#requestLayout()} if the view hierarchy is currently 1987 * undergoing a layout pass. requestLayout() should not generally be called during layout, 1988 * unless the container hierarchy knows what it is doing (i.e., it is fine as long as 1989 * all children in that container hierarchy are measured and laid out at the end of the layout 1990 * pass for that container). If requestLayout() is called anyway, we handle it correctly 1991 * by registering all requesters during a frame as it proceeds. At the end of the frame, 1992 * we check all of those views to see if any still have pending layout requests, which 1993 * indicates that they were not correctly handled by their container hierarchy. If that is 1994 * the case, we clear all such flags in the tree, to remove the buggy flag state that leads 1995 * to blank containers, and force a second request/measure/layout pass in this frame. If 1996 * more requestLayout() calls are received during that second layout pass, we post those 1997 * requests to the next frame to avoid possible infinite loops. 1998 * 1999 * <p>The return value from this method indicates whether the request should proceed 2000 * (if it is a request during the first layout pass) or should be skipped and posted to the 2001 * next frame (if it is a request during the second layout pass).</p> 2002 * 2003 * @param view the view that requested the layout. 2004 * 2005 * @return true if request should proceed, false otherwise. 2006 */ 2007 boolean requestLayoutDuringLayout(final View view) { 2008 if (view.mParent == null || view.mAttachInfo == null) { 2009 // Would not normally trigger another layout, so just let it pass through as usual 2010 return true; 2011 } 2012 if (!mLayoutRequesters.contains(view)) { 2013 mLayoutRequesters.add(view); 2014 } 2015 if (!mHandlingLayoutInLayoutRequest) { 2016 // Let the request proceed normally; it will be processed in a second layout pass 2017 // if necessary 2018 return true; 2019 } else { 2020 // Don't let the request proceed during the second layout pass. 2021 // It will post to the next frame instead. 2022 return false; 2023 } 2024 } 2025 2026 private void performLayout(WindowManager.LayoutParams lp, int desiredWindowWidth, 2027 int desiredWindowHeight) { 2028 mLayoutRequested = false; 2029 mScrollMayChange = true; 2030 mInLayout = true; 2031 2032 final View host = mView; 2033 if (DEBUG_ORIENTATION || DEBUG_LAYOUT) { 2034 Log.v(TAG, "Laying out " + host + " to (" + 2035 host.getMeasuredWidth() + ", " + host.getMeasuredHeight() + ")"); 2036 } 2037 2038 Trace.traceBegin(Trace.TRACE_TAG_VIEW, "layout"); 2039 try { 2040 host.layout(0, 0, host.getMeasuredWidth(), host.getMeasuredHeight()); 2041 2042 mInLayout = false; 2043 int numViewsRequestingLayout = mLayoutRequesters.size(); 2044 if (numViewsRequestingLayout > 0) { 2045 // requestLayout() was called during layout. 2046 // If no layout-request flags are set on the requesting views, there is no problem. 2047 // If some requests are still pending, then we need to clear those flags and do 2048 // a full request/measure/layout pass to handle this situation. 2049 ArrayList<View> validLayoutRequesters = getValidLayoutRequesters(mLayoutRequesters, 2050 false); 2051 if (validLayoutRequesters != null) { 2052 // Set this flag to indicate that any further requests are happening during 2053 // the second pass, which may result in posting those requests to the next 2054 // frame instead 2055 mHandlingLayoutInLayoutRequest = true; 2056 2057 // Process fresh layout requests, then measure and layout 2058 int numValidRequests = validLayoutRequesters.size(); 2059 for (int i = 0; i < numValidRequests; ++i) { 2060 final View view = validLayoutRequesters.get(i); 2061 Log.w("View", "requestLayout() improperly called by " + view + 2062 " during layout: running second layout pass"); 2063 view.requestLayout(); 2064 } 2065 measureHierarchy(host, lp, mView.getContext().getResources(), 2066 desiredWindowWidth, desiredWindowHeight); 2067 mInLayout = true; 2068 host.layout(0, 0, host.getMeasuredWidth(), host.getMeasuredHeight()); 2069 2070 mHandlingLayoutInLayoutRequest = false; 2071 2072 // Check the valid requests again, this time without checking/clearing the 2073 // layout flags, since requests happening during the second pass get noop'd 2074 validLayoutRequesters = getValidLayoutRequesters(mLayoutRequesters, true); 2075 if (validLayoutRequesters != null) { 2076 final ArrayList<View> finalRequesters = validLayoutRequesters; 2077 // Post second-pass requests to the next frame 2078 getRunQueue().post(new Runnable() { 2079 @Override 2080 public void run() { 2081 int numValidRequests = finalRequesters.size(); 2082 for (int i = 0; i < numValidRequests; ++i) { 2083 final View view = finalRequesters.get(i); 2084 Log.w("View", "requestLayout() improperly called by " + view + 2085 " during second layout pass: posting in next frame"); 2086 view.requestLayout(); 2087 } 2088 } 2089 }); 2090 } 2091 } 2092 2093 } 2094 } finally { 2095 Trace.traceEnd(Trace.TRACE_TAG_VIEW); 2096 } 2097 mInLayout = false; 2098 } 2099 2100 /** 2101 * This method is called during layout when there have been calls to requestLayout() during 2102 * layout. It walks through the list of views that requested layout to determine which ones 2103 * still need it, based on visibility in the hierarchy and whether they have already been 2104 * handled (as is usually the case with ListView children). 2105 * 2106 * @param layoutRequesters The list of views that requested layout during layout 2107 * @param secondLayoutRequests Whether the requests were issued during the second layout pass. 2108 * If so, the FORCE_LAYOUT flag was not set on requesters. 2109 * @return A list of the actual views that still need to be laid out. 2110 */ 2111 private ArrayList<View> getValidLayoutRequesters(ArrayList<View> layoutRequesters, 2112 boolean secondLayoutRequests) { 2113 2114 int numViewsRequestingLayout = layoutRequesters.size(); 2115 ArrayList<View> validLayoutRequesters = null; 2116 for (int i = 0; i < numViewsRequestingLayout; ++i) { 2117 View view = layoutRequesters.get(i); 2118 if (view != null && view.mAttachInfo != null && view.mParent != null && 2119 (secondLayoutRequests || (view.mPrivateFlags & View.PFLAG_FORCE_LAYOUT) == 2120 View.PFLAG_FORCE_LAYOUT)) { 2121 boolean gone = false; 2122 View parent = view; 2123 // Only trigger new requests for views in a non-GONE hierarchy 2124 while (parent != null) { 2125 if ((parent.mViewFlags & View.VISIBILITY_MASK) == View.GONE) { 2126 gone = true; 2127 break; 2128 } 2129 if (parent.mParent instanceof View) { 2130 parent = (View) parent.mParent; 2131 } else { 2132 parent = null; 2133 } 2134 } 2135 if (!gone) { 2136 if (validLayoutRequesters == null) { 2137 validLayoutRequesters = new ArrayList<View>(); 2138 } 2139 validLayoutRequesters.add(view); 2140 } 2141 } 2142 } 2143 if (!secondLayoutRequests) { 2144 // If we're checking the layout flags, then we need to clean them up also 2145 for (int i = 0; i < numViewsRequestingLayout; ++i) { 2146 View view = layoutRequesters.get(i); 2147 while (view != null && 2148 (view.mPrivateFlags & View.PFLAG_FORCE_LAYOUT) != 0) { 2149 view.mPrivateFlags &= ~View.PFLAG_FORCE_LAYOUT; 2150 if (view.mParent instanceof View) { 2151 view = (View) view.mParent; 2152 } else { 2153 view = null; 2154 } 2155 } 2156 } 2157 } 2158 layoutRequesters.clear(); 2159 return validLayoutRequesters; 2160 } 2161 2162 @Override 2163 public void requestTransparentRegion(View child) { 2164 // the test below should not fail unless someone is messing with us 2165 checkThread(); 2166 if (mView == child) { 2167 mView.mPrivateFlags |= View.PFLAG_REQUEST_TRANSPARENT_REGIONS; 2168 // Need to make sure we re-evaluate the window attributes next 2169 // time around, to ensure the window has the correct format. 2170 mWindowAttributesChanged = true; 2171 mWindowAttributesChangesFlag = 0; 2172 requestLayout(); 2173 } 2174 } 2175 2176 /** 2177 * Figures out the measure spec for the root view in a window based on it's 2178 * layout params. 2179 * 2180 * @param windowSize 2181 * The available width or height of the window 2182 * 2183 * @param rootDimension 2184 * The layout params for one dimension (width or height) of the 2185 * window. 2186 * 2187 * @return The measure spec to use to measure the root view. 2188 */ 2189 private static int getRootMeasureSpec(int windowSize, int rootDimension) { 2190 int measureSpec; 2191 switch (rootDimension) { 2192 2193 case ViewGroup.LayoutParams.MATCH_PARENT: 2194 // Window can't resize. Force root view to be windowSize. 2195 measureSpec = MeasureSpec.makeMeasureSpec(windowSize, MeasureSpec.EXACTLY); 2196 break; 2197 case ViewGroup.LayoutParams.WRAP_CONTENT: 2198 // Window can resize. Set max size for root view. 2199 measureSpec = MeasureSpec.makeMeasureSpec(windowSize, MeasureSpec.AT_MOST); 2200 break; 2201 default: 2202 // Window wants to be an exact size. Force root view to be that size. 2203 measureSpec = MeasureSpec.makeMeasureSpec(rootDimension, MeasureSpec.EXACTLY); 2204 break; 2205 } 2206 return measureSpec; 2207 } 2208 2209 int mHardwareYOffset; 2210 int mResizeAlpha; 2211 final Paint mResizePaint = new Paint(); 2212 2213 @Override 2214 public void onHardwarePreDraw(HardwareCanvas canvas) { 2215 canvas.translate(0, -mHardwareYOffset); 2216 } 2217 2218 @Override 2219 public void onHardwarePostDraw(HardwareCanvas canvas) { 2220 if (mResizeBuffer != null) { 2221 mResizePaint.setAlpha(mResizeAlpha); 2222 canvas.drawHardwareLayer(mResizeBuffer, 0.0f, mHardwareYOffset, mResizePaint); 2223 } 2224 drawAccessibilityFocusedDrawableIfNeeded(canvas); 2225 } 2226 2227 /** 2228 * @hide 2229 */ 2230 void outputDisplayList(View view) { 2231 RenderNode renderNode = view.getDisplayList(); 2232 if (renderNode != null) { 2233 renderNode.output(); 2234 } 2235 } 2236 2237 /** 2238 * @see #PROPERTY_PROFILE_RENDERING 2239 */ 2240 private void profileRendering(boolean enabled) { 2241 if (mProfileRendering) { 2242 mRenderProfilingEnabled = enabled; 2243 2244 if (mRenderProfiler != null) { 2245 mChoreographer.removeFrameCallback(mRenderProfiler); 2246 } 2247 if (mRenderProfilingEnabled) { 2248 if (mRenderProfiler == null) { 2249 mRenderProfiler = new Choreographer.FrameCallback() { 2250 @Override 2251 public void doFrame(long frameTimeNanos) { 2252 mDirty.set(0, 0, mWidth, mHeight); 2253 scheduleTraversals(); 2254 if (mRenderProfilingEnabled) { 2255 mChoreographer.postFrameCallback(mRenderProfiler); 2256 } 2257 } 2258 }; 2259 } 2260 mChoreographer.postFrameCallback(mRenderProfiler); 2261 } else { 2262 mRenderProfiler = null; 2263 } 2264 } 2265 } 2266 2267 /** 2268 * Called from draw() when DEBUG_FPS is enabled 2269 */ 2270 private void trackFPS() { 2271 // Tracks frames per second drawn. First value in a series of draws may be bogus 2272 // because it down not account for the intervening idle time 2273 long nowTime = System.currentTimeMillis(); 2274 if (mFpsStartTime < 0) { 2275 mFpsStartTime = mFpsPrevTime = nowTime; 2276 mFpsNumFrames = 0; 2277 } else { 2278 ++mFpsNumFrames; 2279 String thisHash = Integer.toHexString(System.identityHashCode(this)); 2280 long frameTime = nowTime - mFpsPrevTime; 2281 long totalTime = nowTime - mFpsStartTime; 2282 Log.v(TAG, "0x" + thisHash + "\tFrame time:\t" + frameTime); 2283 mFpsPrevTime = nowTime; 2284 if (totalTime > 1000) { 2285 float fps = (float) mFpsNumFrames * 1000 / totalTime; 2286 Log.v(TAG, "0x" + thisHash + "\tFPS:\t" + fps); 2287 mFpsStartTime = nowTime; 2288 mFpsNumFrames = 0; 2289 } 2290 } 2291 } 2292 2293 private void performDraw() { 2294 if (mAttachInfo.mDisplayState == Display.STATE_OFF && !mReportNextDraw) { 2295 return; 2296 } 2297 2298 final boolean fullRedrawNeeded = mFullRedrawNeeded; 2299 mFullRedrawNeeded = false; 2300 2301 mIsDrawing = true; 2302 Trace.traceBegin(Trace.TRACE_TAG_VIEW, "draw"); 2303 try { 2304 draw(fullRedrawNeeded); 2305 } finally { 2306 mIsDrawing = false; 2307 Trace.traceEnd(Trace.TRACE_TAG_VIEW); 2308 } 2309 2310 if (mReportNextDraw) { 2311 mReportNextDraw = false; 2312 if (mAttachInfo.mHardwareRenderer != null) { 2313 mAttachInfo.mHardwareRenderer.fence(); 2314 } 2315 2316 if (LOCAL_LOGV) { 2317 Log.v(TAG, "FINISHED DRAWING: " + mWindowAttributes.getTitle()); 2318 } 2319 if (mSurfaceHolder != null && mSurface.isValid()) { 2320 mSurfaceHolderCallback.surfaceRedrawNeeded(mSurfaceHolder); 2321 SurfaceHolder.Callback callbacks[] = mSurfaceHolder.getCallbacks(); 2322 if (callbacks != null) { 2323 for (SurfaceHolder.Callback c : callbacks) { 2324 if (c instanceof SurfaceHolder.Callback2) { 2325 ((SurfaceHolder.Callback2)c).surfaceRedrawNeeded( 2326 mSurfaceHolder); 2327 } 2328 } 2329 } 2330 } 2331 try { 2332 mWindowSession.finishDrawing(mWindow); 2333 } catch (RemoteException e) { 2334 } 2335 } 2336 } 2337 2338 private void draw(boolean fullRedrawNeeded) { 2339 Surface surface = mSurface; 2340 if (!surface.isValid()) { 2341 return; 2342 } 2343 2344 if (DEBUG_FPS) { 2345 trackFPS(); 2346 } 2347 2348 if (!sFirstDrawComplete) { 2349 synchronized (sFirstDrawHandlers) { 2350 sFirstDrawComplete = true; 2351 final int count = sFirstDrawHandlers.size(); 2352 for (int i = 0; i< count; i++) { 2353 mHandler.post(sFirstDrawHandlers.get(i)); 2354 } 2355 } 2356 } 2357 2358 scrollToRectOrFocus(null, false); 2359 2360 final AttachInfo attachInfo = mAttachInfo; 2361 if (attachInfo.mViewScrollChanged) { 2362 attachInfo.mViewScrollChanged = false; 2363 attachInfo.mTreeObserver.dispatchOnScrollChanged(); 2364 } 2365 2366 int yoff; 2367 boolean animating = mScroller != null && mScroller.computeScrollOffset(); 2368 if (animating) { 2369 yoff = mScroller.getCurrY(); 2370 } else { 2371 yoff = mScrollY; 2372 } 2373 if (mCurScrollY != yoff) { 2374 mCurScrollY = yoff; 2375 fullRedrawNeeded = true; 2376 } 2377 2378 final float appScale = attachInfo.mApplicationScale; 2379 final boolean scalingRequired = attachInfo.mScalingRequired; 2380 2381 int resizeAlpha = 0; 2382 if (mResizeBuffer != null) { 2383 long deltaTime = SystemClock.uptimeMillis() - mResizeBufferStartTime; 2384 if (deltaTime < mResizeBufferDuration) { 2385 float amt = deltaTime/(float) mResizeBufferDuration; 2386 amt = mResizeInterpolator.getInterpolation(amt); 2387 animating = true; 2388 resizeAlpha = 255 - (int)(amt*255); 2389 } else { 2390 disposeResizeBuffer(); 2391 } 2392 } 2393 2394 final Rect dirty = mDirty; 2395 if (mSurfaceHolder != null) { 2396 // The app owns the surface, we won't draw. 2397 dirty.setEmpty(); 2398 if (animating) { 2399 if (mScroller != null) { 2400 mScroller.abortAnimation(); 2401 } 2402 disposeResizeBuffer(); 2403 } 2404 return; 2405 } 2406 2407 if (fullRedrawNeeded) { 2408 attachInfo.mIgnoreDirtyState = true; 2409 dirty.set(0, 0, (int) (mWidth * appScale + 0.5f), (int) (mHeight * appScale + 0.5f)); 2410 } 2411 2412 if (DEBUG_ORIENTATION || DEBUG_DRAW) { 2413 Log.v(TAG, "Draw " + mView + "/" 2414 + mWindowAttributes.getTitle() 2415 + ": dirty={" + dirty.left + "," + dirty.top 2416 + "," + dirty.right + "," + dirty.bottom + "} surface=" 2417 + surface + " surface.isValid()=" + surface.isValid() + ", appScale:" + 2418 appScale + ", width=" + mWidth + ", height=" + mHeight); 2419 } 2420 2421 attachInfo.mTreeObserver.dispatchOnDraw(); 2422 2423 if (!dirty.isEmpty() || mIsAnimating) { 2424 if (attachInfo.mHardwareRenderer != null && attachInfo.mHardwareRenderer.isEnabled()) { 2425 // Draw with hardware renderer. 2426 mIsAnimating = false; 2427 mHardwareYOffset = yoff; 2428 mResizeAlpha = resizeAlpha; 2429 2430 mCurrentDirty.set(dirty); 2431 dirty.setEmpty(); 2432 2433 mBlockResizeBuffer = false; 2434 attachInfo.mHardwareRenderer.draw(mView, attachInfo, this, 2435 animating ? null : mCurrentDirty); 2436 } else { 2437 // If we get here with a disabled & requested hardware renderer, something went 2438 // wrong (an invalidate posted right before we destroyed the hardware surface 2439 // for instance) so we should just bail out. Locking the surface with software 2440 // rendering at this point would lock it forever and prevent hardware renderer 2441 // from doing its job when it comes back. 2442 // Before we request a new frame we must however attempt to reinitiliaze the 2443 // hardware renderer if it's in requested state. This would happen after an 2444 // eglTerminate() for instance. 2445 if (attachInfo.mHardwareRenderer != null && 2446 !attachInfo.mHardwareRenderer.isEnabled() && 2447 attachInfo.mHardwareRenderer.isRequested()) { 2448 2449 try { 2450 attachInfo.mHardwareRenderer.initializeIfNeeded(mWidth, mHeight, 2451 mSurface); 2452 } catch (OutOfResourcesException e) { 2453 handleOutOfResourcesException(e); 2454 return; 2455 } 2456 2457 mFullRedrawNeeded = true; 2458 scheduleTraversals(); 2459 return; 2460 } 2461 2462 if (!drawSoftware(surface, attachInfo, yoff, scalingRequired, dirty)) { 2463 return; 2464 } 2465 } 2466 } 2467 2468 if (animating) { 2469 mFullRedrawNeeded = true; 2470 scheduleTraversals(); 2471 } 2472 } 2473 2474 /** 2475 * @return true if drawing was succesfull, false if an error occurred 2476 */ 2477 private boolean drawSoftware(Surface surface, AttachInfo attachInfo, int yoff, 2478 boolean scalingRequired, Rect dirty) { 2479 2480 // Draw with software renderer. 2481 Canvas canvas; 2482 try { 2483 int left = dirty.left; 2484 int top = dirty.top; 2485 int right = dirty.right; 2486 int bottom = dirty.bottom; 2487 2488 canvas = mSurface.lockCanvas(dirty); 2489 2490 // The dirty rectangle can be modified by Surface.lockCanvas() 2491 //noinspection ConstantConditions 2492 if (left != dirty.left || top != dirty.top || right != dirty.right || 2493 bottom != dirty.bottom) { 2494 attachInfo.mIgnoreDirtyState = true; 2495 } 2496 2497 // TODO: Do this in native 2498 canvas.setDensity(mDensity); 2499 } catch (Surface.OutOfResourcesException e) { 2500 handleOutOfResourcesException(e); 2501 return false; 2502 } catch (IllegalArgumentException e) { 2503 Log.e(TAG, "Could not lock surface", e); 2504 // Don't assume this is due to out of memory, it could be 2505 // something else, and if it is something else then we could 2506 // kill stuff (or ourself) for no reason. 2507 mLayoutRequested = true; // ask wm for a new surface next time. 2508 return false; 2509 } 2510 2511 try { 2512 if (DEBUG_ORIENTATION || DEBUG_DRAW) { 2513 Log.v(TAG, "Surface " + surface + " drawing to bitmap w=" 2514 + canvas.getWidth() + ", h=" + canvas.getHeight()); 2515 //canvas.drawARGB(255, 255, 0, 0); 2516 } 2517 2518 // If this bitmap's format includes an alpha channel, we 2519 // need to clear it before drawing so that the child will 2520 // properly re-composite its drawing on a transparent 2521 // background. This automatically respects the clip/dirty region 2522 // or 2523 // If we are applying an offset, we need to clear the area 2524 // where the offset doesn't appear to avoid having garbage 2525 // left in the blank areas. 2526 if (!canvas.isOpaque() || yoff != 0) { 2527 canvas.drawColor(0, PorterDuff.Mode.CLEAR); 2528 } 2529 2530 dirty.setEmpty(); 2531 mIsAnimating = false; 2532 attachInfo.mDrawingTime = SystemClock.uptimeMillis(); 2533 mView.mPrivateFlags |= View.PFLAG_DRAWN; 2534 2535 if (DEBUG_DRAW) { 2536 Context cxt = mView.getContext(); 2537 Log.i(TAG, "Drawing: package:" + cxt.getPackageName() + 2538 ", metrics=" + cxt.getResources().getDisplayMetrics() + 2539 ", compatibilityInfo=" + cxt.getResources().getCompatibilityInfo()); 2540 } 2541 try { 2542 canvas.translate(0, -yoff); 2543 if (mTranslator != null) { 2544 mTranslator.translateCanvas(canvas); 2545 } 2546 canvas.setScreenDensity(scalingRequired ? mNoncompatDensity : 0); 2547 attachInfo.mSetIgnoreDirtyState = false; 2548 2549 mView.draw(canvas); 2550 2551 drawAccessibilityFocusedDrawableIfNeeded(canvas); 2552 } finally { 2553 if (!attachInfo.mSetIgnoreDirtyState) { 2554 // Only clear the flag if it was not set during the mView.draw() call 2555 attachInfo.mIgnoreDirtyState = false; 2556 } 2557 } 2558 } finally { 2559 try { 2560 surface.unlockCanvasAndPost(canvas); 2561 } catch (IllegalArgumentException e) { 2562 Log.e(TAG, "Could not unlock surface", e); 2563 mLayoutRequested = true; // ask wm for a new surface next time. 2564 //noinspection ReturnInsideFinallyBlock 2565 return false; 2566 } 2567 2568 if (LOCAL_LOGV) { 2569 Log.v(TAG, "Surface " + surface + " unlockCanvasAndPost"); 2570 } 2571 } 2572 return true; 2573 } 2574 2575 /** 2576 * We want to draw a highlight around the current accessibility focused. 2577 * Since adding a style for all possible view is not a viable option we 2578 * have this specialized drawing method. 2579 * 2580 * Note: We are doing this here to be able to draw the highlight for 2581 * virtual views in addition to real ones. 2582 * 2583 * @param canvas The canvas on which to draw. 2584 */ 2585 private void drawAccessibilityFocusedDrawableIfNeeded(Canvas canvas) { 2586 final AccessibilityManager manager = AccessibilityManager.getInstance(mView.mContext); 2587 if (!manager.isEnabled() || !manager.isTouchExplorationEnabled()) { 2588 return; 2589 } 2590 2591 final View host = mAccessibilityFocusedHost; 2592 if (host == null || host.mAttachInfo == null) { 2593 return; 2594 } 2595 2596 final Drawable drawable = getAccessibilityFocusedDrawable(); 2597 if (drawable == null) { 2598 return; 2599 } 2600 2601 final AccessibilityNodeProvider provider = host.getAccessibilityNodeProvider(); 2602 final Rect bounds = mView.mAttachInfo.mTmpInvalRect; 2603 if (provider == null) { 2604 host.getBoundsOnScreen(bounds); 2605 } else if (mAccessibilityFocusedVirtualView != null) { 2606 mAccessibilityFocusedVirtualView.getBoundsInScreen(bounds); 2607 } else { 2608 return; 2609 } 2610 2611 bounds.offset(-mAttachInfo.mWindowLeft, -mAttachInfo.mWindowTop); 2612 bounds.intersect(0, 0, mAttachInfo.mViewRootImpl.mWidth, mAttachInfo.mViewRootImpl.mHeight); 2613 drawable.setBounds(bounds); 2614 drawable.draw(canvas); 2615 } 2616 2617 private Drawable getAccessibilityFocusedDrawable() { 2618 if (mAttachInfo != null) { 2619 // Lazily load the accessibility focus drawable. 2620 if (mAttachInfo.mAccessibilityFocusDrawable == null) { 2621 TypedValue value = new TypedValue(); 2622 final boolean resolved = mView.mContext.getTheme().resolveAttribute( 2623 R.attr.accessibilityFocusedDrawable, value, true); 2624 if (resolved) { 2625 mAttachInfo.mAccessibilityFocusDrawable = 2626 mView.mContext.getDrawable(value.resourceId); 2627 } 2628 } 2629 return mAttachInfo.mAccessibilityFocusDrawable; 2630 } 2631 return null; 2632 } 2633 2634 /** 2635 * @hide 2636 */ 2637 public void setDrawDuringWindowsAnimating(boolean value) { 2638 mDrawDuringWindowsAnimating = value; 2639 if (value) { 2640 handleDispatchDoneAnimating(); 2641 } 2642 } 2643 2644 boolean scrollToRectOrFocus(Rect rectangle, boolean immediate) { 2645 final View.AttachInfo attachInfo = mAttachInfo; 2646 final Rect ci = attachInfo.mContentInsets; 2647 final Rect vi = attachInfo.mVisibleInsets; 2648 int scrollY = 0; 2649 boolean handled = false; 2650 2651 if (vi.left > ci.left || vi.top > ci.top 2652 || vi.right > ci.right || vi.bottom > ci.bottom) { 2653 // We'll assume that we aren't going to change the scroll 2654 // offset, since we want to avoid that unless it is actually 2655 // going to make the focus visible... otherwise we scroll 2656 // all over the place. 2657 scrollY = mScrollY; 2658 // We can be called for two different situations: during a draw, 2659 // to update the scroll position if the focus has changed (in which 2660 // case 'rectangle' is null), or in response to a 2661 // requestChildRectangleOnScreen() call (in which case 'rectangle' 2662 // is non-null and we just want to scroll to whatever that 2663 // rectangle is). 2664 final View focus = mView.findFocus(); 2665 if (focus == null) { 2666 return false; 2667 } 2668 View lastScrolledFocus = (mLastScrolledFocus != null) ? mLastScrolledFocus.get() : null; 2669 if (focus != lastScrolledFocus) { 2670 // If the focus has changed, then ignore any requests to scroll 2671 // to a rectangle; first we want to make sure the entire focus 2672 // view is visible. 2673 rectangle = null; 2674 } 2675 if (DEBUG_INPUT_RESIZE) Log.v(TAG, "Eval scroll: focus=" + focus 2676 + " rectangle=" + rectangle + " ci=" + ci 2677 + " vi=" + vi); 2678 if (focus == lastScrolledFocus && !mScrollMayChange && rectangle == null) { 2679 // Optimization: if the focus hasn't changed since last 2680 // time, and no layout has happened, then just leave things 2681 // as they are. 2682 if (DEBUG_INPUT_RESIZE) Log.v(TAG, "Keeping scroll y=" 2683 + mScrollY + " vi=" + vi.toShortString()); 2684 } else { 2685 // We need to determine if the currently focused view is 2686 // within the visible part of the window and, if not, apply 2687 // a pan so it can be seen. 2688 mLastScrolledFocus = new WeakReference<View>(focus); 2689 mScrollMayChange = false; 2690 if (DEBUG_INPUT_RESIZE) Log.v(TAG, "Need to scroll?"); 2691 // Try to find the rectangle from the focus view. 2692 if (focus.getGlobalVisibleRect(mVisRect, null)) { 2693 if (DEBUG_INPUT_RESIZE) Log.v(TAG, "Root w=" 2694 + mView.getWidth() + " h=" + mView.getHeight() 2695 + " ci=" + ci.toShortString() 2696 + " vi=" + vi.toShortString()); 2697 if (rectangle == null) { 2698 focus.getFocusedRect(mTempRect); 2699 if (DEBUG_INPUT_RESIZE) Log.v(TAG, "Focus " + focus 2700 + ": focusRect=" + mTempRect.toShortString()); 2701 if (mView instanceof ViewGroup) { 2702 ((ViewGroup) mView).offsetDescendantRectToMyCoords( 2703 focus, mTempRect); 2704 } 2705 if (DEBUG_INPUT_RESIZE) Log.v(TAG, 2706 "Focus in window: focusRect=" 2707 + mTempRect.toShortString() 2708 + " visRect=" + mVisRect.toShortString()); 2709 } else { 2710 mTempRect.set(rectangle); 2711 if (DEBUG_INPUT_RESIZE) Log.v(TAG, 2712 "Request scroll to rect: " 2713 + mTempRect.toShortString() 2714 + " visRect=" + mVisRect.toShortString()); 2715 } 2716 if (mTempRect.intersect(mVisRect)) { 2717 if (DEBUG_INPUT_RESIZE) Log.v(TAG, 2718 "Focus window visible rect: " 2719 + mTempRect.toShortString()); 2720 if (mTempRect.height() > 2721 (mView.getHeight()-vi.top-vi.bottom)) { 2722 // If the focus simply is not going to fit, then 2723 // best is probably just to leave things as-is. 2724 if (DEBUG_INPUT_RESIZE) Log.v(TAG, 2725 "Too tall; leaving scrollY=" + scrollY); 2726 } else if ((mTempRect.top-scrollY) < vi.top) { 2727 scrollY -= vi.top - (mTempRect.top-scrollY); 2728 if (DEBUG_INPUT_RESIZE) Log.v(TAG, 2729 "Top covered; scrollY=" + scrollY); 2730 } else if ((mTempRect.bottom-scrollY) 2731 > (mView.getHeight()-vi.bottom)) { 2732 scrollY += (mTempRect.bottom-scrollY) 2733 - (mView.getHeight()-vi.bottom); 2734 if (DEBUG_INPUT_RESIZE) Log.v(TAG, 2735 "Bottom covered; scrollY=" + scrollY); 2736 } 2737 handled = true; 2738 } 2739 } 2740 } 2741 } 2742 2743 if (scrollY != mScrollY) { 2744 if (DEBUG_INPUT_RESIZE) Log.v(TAG, "Pan scroll changed: old=" 2745 + mScrollY + " , new=" + scrollY); 2746 if (!immediate && mResizeBuffer == null) { 2747 if (mScroller == null) { 2748 mScroller = new Scroller(mView.getContext()); 2749 } 2750 mScroller.startScroll(0, mScrollY, 0, scrollY-mScrollY); 2751 } else if (mScroller != null) { 2752 mScroller.abortAnimation(); 2753 } 2754 mScrollY = scrollY; 2755 } 2756 2757 return handled; 2758 } 2759 2760 /** 2761 * @hide 2762 */ 2763 public View getAccessibilityFocusedHost() { 2764 return mAccessibilityFocusedHost; 2765 } 2766 2767 /** 2768 * @hide 2769 */ 2770 public AccessibilityNodeInfo getAccessibilityFocusedVirtualView() { 2771 return mAccessibilityFocusedVirtualView; 2772 } 2773 2774 void setAccessibilityFocus(View view, AccessibilityNodeInfo node) { 2775 // If we have a virtual view with accessibility focus we need 2776 // to clear the focus and invalidate the virtual view bounds. 2777 if (mAccessibilityFocusedVirtualView != null) { 2778 2779 AccessibilityNodeInfo focusNode = mAccessibilityFocusedVirtualView; 2780 View focusHost = mAccessibilityFocusedHost; 2781 2782 // Wipe the state of the current accessibility focus since 2783 // the call into the provider to clear accessibility focus 2784 // will fire an accessibility event which will end up calling 2785 // this method and we want to have clean state when this 2786 // invocation happens. 2787 mAccessibilityFocusedHost = null; 2788 mAccessibilityFocusedVirtualView = null; 2789 2790 // Clear accessibility focus on the host after clearing state since 2791 // this method may be reentrant. 2792 focusHost.clearAccessibilityFocusNoCallbacks(); 2793 2794 AccessibilityNodeProvider provider = focusHost.getAccessibilityNodeProvider(); 2795 if (provider != null) { 2796 // Invalidate the area of the cleared accessibility focus. 2797 focusNode.getBoundsInParent(mTempRect); 2798 focusHost.invalidate(mTempRect); 2799 // Clear accessibility focus in the virtual node. 2800 final int virtualNodeId = AccessibilityNodeInfo.getVirtualDescendantId( 2801 focusNode.getSourceNodeId()); 2802 provider.performAction(virtualNodeId, 2803 AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS, null); 2804 } 2805 focusNode.recycle(); 2806 } 2807 if (mAccessibilityFocusedHost != null) { 2808 // Clear accessibility focus in the view. 2809 mAccessibilityFocusedHost.clearAccessibilityFocusNoCallbacks(); 2810 } 2811 2812 // Set the new focus host and node. 2813 mAccessibilityFocusedHost = view; 2814 mAccessibilityFocusedVirtualView = node; 2815 } 2816 2817 @Override 2818 public void requestChildFocus(View child, View focused) { 2819 if (DEBUG_INPUT_RESIZE) { 2820 Log.v(TAG, "Request child focus: focus now " + focused); 2821 } 2822 checkThread(); 2823 scheduleTraversals(); 2824 } 2825 2826 @Override 2827 public void clearChildFocus(View child) { 2828 if (DEBUG_INPUT_RESIZE) { 2829 Log.v(TAG, "Clearing child focus"); 2830 } 2831 checkThread(); 2832 scheduleTraversals(); 2833 } 2834 2835 @Override 2836 public ViewParent getParentForAccessibility() { 2837 return null; 2838 } 2839 2840 @Override 2841 public void focusableViewAvailable(View v) { 2842 checkThread(); 2843 if (mView != null) { 2844 if (!mView.hasFocus()) { 2845 v.requestFocus(); 2846 } else { 2847 // the one case where will transfer focus away from the current one 2848 // is if the current view is a view group that prefers to give focus 2849 // to its children first AND the view is a descendant of it. 2850 View focused = mView.findFocus(); 2851 if (focused instanceof ViewGroup) { 2852 ViewGroup group = (ViewGroup) focused; 2853 if (group.getDescendantFocusability() == ViewGroup.FOCUS_AFTER_DESCENDANTS 2854 && isViewDescendantOf(v, focused)) { 2855 v.requestFocus(); 2856 } 2857 } 2858 } 2859 } 2860 } 2861 2862 @Override 2863 public void recomputeViewAttributes(View child) { 2864 checkThread(); 2865 if (mView == child) { 2866 mAttachInfo.mRecomputeGlobalAttributes = true; 2867 if (!mWillDrawSoon) { 2868 scheduleTraversals(); 2869 } 2870 } 2871 } 2872 2873 void dispatchDetachedFromWindow() { 2874 if (mView != null && mView.mAttachInfo != null) { 2875 mAttachInfo.mTreeObserver.dispatchOnWindowAttachedChange(false); 2876 mView.dispatchDetachedFromWindow(); 2877 } 2878 2879 mAccessibilityInteractionConnectionManager.ensureNoConnection(); 2880 mAccessibilityManager.removeAccessibilityStateChangeListener( 2881 mAccessibilityInteractionConnectionManager); 2882 removeSendWindowContentChangedCallback(); 2883 2884 destroyHardwareRenderer(); 2885 2886 setAccessibilityFocus(null, null); 2887 2888 mView.assignParent(null); 2889 mView = null; 2890 mAttachInfo.mRootView = null; 2891 2892 mSurface.release(); 2893 2894 if (mInputQueueCallback != null && mInputQueue != null) { 2895 mInputQueueCallback.onInputQueueDestroyed(mInputQueue); 2896 mInputQueue.dispose(); 2897 mInputQueueCallback = null; 2898 mInputQueue = null; 2899 } 2900 if (mInputEventReceiver != null) { 2901 mInputEventReceiver.dispose(); 2902 mInputEventReceiver = null; 2903 } 2904 try { 2905 mWindowSession.remove(mWindow); 2906 } catch (RemoteException e) { 2907 } 2908 2909 // Dispose the input channel after removing the window so the Window Manager 2910 // doesn't interpret the input channel being closed as an abnormal termination. 2911 if (mInputChannel != null) { 2912 mInputChannel.dispose(); 2913 mInputChannel = null; 2914 } 2915 2916 mDisplayManager.unregisterDisplayListener(mDisplayListener); 2917 2918 unscheduleTraversals(); 2919 } 2920 2921 void updateConfiguration(Configuration config, boolean force) { 2922 if (DEBUG_CONFIGURATION) Log.v(TAG, 2923 "Applying new config to window " 2924 + mWindowAttributes.getTitle() 2925 + ": " + config); 2926 2927 CompatibilityInfo ci = mDisplayAdjustments.getCompatibilityInfo(); 2928 if (!ci.equals(CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO)) { 2929 config = new Configuration(config); 2930 ci.applyToConfiguration(mNoncompatDensity, config); 2931 } 2932 2933 synchronized (sConfigCallbacks) { 2934 for (int i=sConfigCallbacks.size()-1; i>=0; i--) { 2935 sConfigCallbacks.get(i).onConfigurationChanged(config); 2936 } 2937 } 2938 if (mView != null) { 2939 // At this point the resources have been updated to 2940 // have the most recent config, whatever that is. Use 2941 // the one in them which may be newer. 2942 config = mView.getResources().getConfiguration(); 2943 if (force || mLastConfiguration.diff(config) != 0) { 2944 final int lastLayoutDirection = mLastConfiguration.getLayoutDirection(); 2945 final int currentLayoutDirection = config.getLayoutDirection(); 2946 mLastConfiguration.setTo(config); 2947 if (lastLayoutDirection != currentLayoutDirection && 2948 mViewLayoutDirectionInitial == View.LAYOUT_DIRECTION_INHERIT) { 2949 mView.setLayoutDirection(currentLayoutDirection); 2950 } 2951 mView.dispatchConfigurationChanged(config); 2952 } 2953 } 2954 } 2955 2956 /** 2957 * Return true if child is an ancestor of parent, (or equal to the parent). 2958 */ 2959 public static boolean isViewDescendantOf(View child, View parent) { 2960 if (child == parent) { 2961 return true; 2962 } 2963 2964 final ViewParent theParent = child.getParent(); 2965 return (theParent instanceof ViewGroup) && isViewDescendantOf((View) theParent, parent); 2966 } 2967 2968 private static void forceLayout(View view) { 2969 view.forceLayout(); 2970 if (view instanceof ViewGroup) { 2971 ViewGroup group = (ViewGroup) view; 2972 final int count = group.getChildCount(); 2973 for (int i = 0; i < count; i++) { 2974 forceLayout(group.getChildAt(i)); 2975 } 2976 } 2977 } 2978 2979 private final static int MSG_INVALIDATE = 1; 2980 private final static int MSG_INVALIDATE_RECT = 2; 2981 private final static int MSG_DIE = 3; 2982 private final static int MSG_RESIZED = 4; 2983 private final static int MSG_RESIZED_REPORT = 5; 2984 private final static int MSG_WINDOW_FOCUS_CHANGED = 6; 2985 private final static int MSG_DISPATCH_INPUT_EVENT = 7; 2986 private final static int MSG_DISPATCH_APP_VISIBILITY = 8; 2987 private final static int MSG_DISPATCH_GET_NEW_SURFACE = 9; 2988 private final static int MSG_DISPATCH_KEY_FROM_IME = 11; 2989 private final static int MSG_FINISH_INPUT_CONNECTION = 12; 2990 private final static int MSG_CHECK_FOCUS = 13; 2991 private final static int MSG_CLOSE_SYSTEM_DIALOGS = 14; 2992 private final static int MSG_DISPATCH_DRAG_EVENT = 15; 2993 private final static int MSG_DISPATCH_DRAG_LOCATION_EVENT = 16; 2994 private final static int MSG_DISPATCH_SYSTEM_UI_VISIBILITY = 17; 2995 private final static int MSG_UPDATE_CONFIGURATION = 18; 2996 private final static int MSG_PROCESS_INPUT_EVENTS = 19; 2997 private final static int MSG_CLEAR_ACCESSIBILITY_FOCUS_HOST = 21; 2998 private final static int MSG_DISPATCH_DONE_ANIMATING = 22; 2999 private final static int MSG_INVALIDATE_WORLD = 23; 3000 private final static int MSG_WINDOW_MOVED = 24; 3001 private final static int MSG_FLUSH_LAYER_UPDATES = 25; 3002 private final static int MSG_SYNTHESIZE_INPUT_EVENT = 26; 3003 3004 final class ViewRootHandler extends Handler { 3005 @Override 3006 public String getMessageName(Message message) { 3007 switch (message.what) { 3008 case MSG_INVALIDATE: 3009 return "MSG_INVALIDATE"; 3010 case MSG_INVALIDATE_RECT: 3011 return "MSG_INVALIDATE_RECT"; 3012 case MSG_DIE: 3013 return "MSG_DIE"; 3014 case MSG_RESIZED: 3015 return "MSG_RESIZED"; 3016 case MSG_RESIZED_REPORT: 3017 return "MSG_RESIZED_REPORT"; 3018 case MSG_WINDOW_FOCUS_CHANGED: 3019 return "MSG_WINDOW_FOCUS_CHANGED"; 3020 case MSG_DISPATCH_INPUT_EVENT: 3021 return "MSG_DISPATCH_INPUT_EVENT"; 3022 case MSG_DISPATCH_APP_VISIBILITY: 3023 return "MSG_DISPATCH_APP_VISIBILITY"; 3024 case MSG_DISPATCH_GET_NEW_SURFACE: 3025 return "MSG_DISPATCH_GET_NEW_SURFACE"; 3026 case MSG_DISPATCH_KEY_FROM_IME: 3027 return "MSG_DISPATCH_KEY_FROM_IME"; 3028 case MSG_FINISH_INPUT_CONNECTION: 3029 return "MSG_FINISH_INPUT_CONNECTION"; 3030 case MSG_CHECK_FOCUS: 3031 return "MSG_CHECK_FOCUS"; 3032 case MSG_CLOSE_SYSTEM_DIALOGS: 3033 return "MSG_CLOSE_SYSTEM_DIALOGS"; 3034 case MSG_DISPATCH_DRAG_EVENT: 3035 return "MSG_DISPATCH_DRAG_EVENT"; 3036 case MSG_DISPATCH_DRAG_LOCATION_EVENT: 3037 return "MSG_DISPATCH_DRAG_LOCATION_EVENT"; 3038 case MSG_DISPATCH_SYSTEM_UI_VISIBILITY: 3039 return "MSG_DISPATCH_SYSTEM_UI_VISIBILITY"; 3040 case MSG_UPDATE_CONFIGURATION: 3041 return "MSG_UPDATE_CONFIGURATION"; 3042 case MSG_PROCESS_INPUT_EVENTS: 3043 return "MSG_PROCESS_INPUT_EVENTS"; 3044 case MSG_CLEAR_ACCESSIBILITY_FOCUS_HOST: 3045 return "MSG_CLEAR_ACCESSIBILITY_FOCUS_HOST"; 3046 case MSG_DISPATCH_DONE_ANIMATING: 3047 return "MSG_DISPATCH_DONE_ANIMATING"; 3048 case MSG_WINDOW_MOVED: 3049 return "MSG_WINDOW_MOVED"; 3050 case MSG_FLUSH_LAYER_UPDATES: 3051 return "MSG_FLUSH_LAYER_UPDATES"; 3052 case MSG_SYNTHESIZE_INPUT_EVENT: 3053 return "MSG_SYNTHESIZE_INPUT_EVENT"; 3054 } 3055 return super.getMessageName(message); 3056 } 3057 3058 @Override 3059 public void handleMessage(Message msg) { 3060 switch (msg.what) { 3061 case MSG_INVALIDATE: 3062 ((View) msg.obj).invalidate(); 3063 break; 3064 case MSG_INVALIDATE_RECT: 3065 final View.AttachInfo.InvalidateInfo info = (View.AttachInfo.InvalidateInfo) msg.obj; 3066 info.target.invalidate(info.left, info.top, info.right, info.bottom); 3067 info.recycle(); 3068 break; 3069 case MSG_PROCESS_INPUT_EVENTS: 3070 mProcessInputEventsScheduled = false; 3071 doProcessInputEvents(); 3072 break; 3073 case MSG_DISPATCH_APP_VISIBILITY: 3074 handleAppVisibility(msg.arg1 != 0); 3075 break; 3076 case MSG_DISPATCH_GET_NEW_SURFACE: 3077 handleGetNewSurface(); 3078 break; 3079 case MSG_RESIZED: { 3080 // Recycled in the fall through... 3081 SomeArgs args = (SomeArgs) msg.obj; 3082 if (mWinFrame.equals(args.arg1) 3083 && mPendingOverscanInsets.equals(args.arg5) 3084 && mPendingContentInsets.equals(args.arg2) 3085 && mPendingVisibleInsets.equals(args.arg3) 3086 && args.arg4 == null) { 3087 break; 3088 } 3089 } // fall through... 3090 case MSG_RESIZED_REPORT: 3091 if (mAdded) { 3092 SomeArgs args = (SomeArgs) msg.obj; 3093 3094 Configuration config = (Configuration) args.arg4; 3095 if (config != null) { 3096 updateConfiguration(config, false); 3097 } 3098 3099 mWinFrame.set((Rect) args.arg1); 3100 mPendingOverscanInsets.set((Rect) args.arg5); 3101 mPendingContentInsets.set((Rect) args.arg2); 3102 mPendingVisibleInsets.set((Rect) args.arg3); 3103 3104 args.recycle(); 3105 3106 if (msg.what == MSG_RESIZED_REPORT) { 3107 mReportNextDraw = true; 3108 } 3109 3110 if (mView != null) { 3111 forceLayout(mView); 3112 } 3113 3114 requestLayout(); 3115 } 3116 break; 3117 case MSG_WINDOW_MOVED: 3118 if (mAdded) { 3119 final int w = mWinFrame.width(); 3120 final int h = mWinFrame.height(); 3121 final int l = msg.arg1; 3122 final int t = msg.arg2; 3123 mWinFrame.left = l; 3124 mWinFrame.right = l + w; 3125 mWinFrame.top = t; 3126 mWinFrame.bottom = t + h; 3127 3128 if (mView != null) { 3129 forceLayout(mView); 3130 } 3131 requestLayout(); 3132 } 3133 break; 3134 case MSG_WINDOW_FOCUS_CHANGED: { 3135 if (mAdded) { 3136 boolean hasWindowFocus = msg.arg1 != 0; 3137 mAttachInfo.mHasWindowFocus = hasWindowFocus; 3138 3139 profileRendering(hasWindowFocus); 3140 3141 if (hasWindowFocus) { 3142 boolean inTouchMode = msg.arg2 != 0; 3143 ensureTouchModeLocally(inTouchMode); 3144 3145 if (mAttachInfo.mHardwareRenderer != null && mSurface.isValid()){ 3146 mFullRedrawNeeded = true; 3147 try { 3148 mAttachInfo.mHardwareRenderer.initializeIfNeeded( 3149 mWidth, mHeight, mSurface); 3150 } catch (OutOfResourcesException e) { 3151 Log.e(TAG, "OutOfResourcesException locking surface", e); 3152 try { 3153 if (!mWindowSession.outOfMemory(mWindow)) { 3154 Slog.w(TAG, "No processes killed for memory; killing self"); 3155 Process.killProcess(Process.myPid()); 3156 } 3157 } catch (RemoteException ex) { 3158 } 3159 // Retry in a bit. 3160 sendMessageDelayed(obtainMessage(msg.what, msg.arg1, msg.arg2), 500); 3161 return; 3162 } 3163 } 3164 } 3165 3166 mLastWasImTarget = WindowManager.LayoutParams 3167 .mayUseInputMethod(mWindowAttributes.flags); 3168 3169 InputMethodManager imm = InputMethodManager.peekInstance(); 3170 if (mView != null) { 3171 if (hasWindowFocus && imm != null && mLastWasImTarget && 3172 !isInLocalFocusMode()) { 3173 imm.startGettingWindowFocus(mView); 3174 } 3175 mAttachInfo.mKeyDispatchState.reset(); 3176 mView.dispatchWindowFocusChanged(hasWindowFocus); 3177 mAttachInfo.mTreeObserver.dispatchOnWindowFocusChange(hasWindowFocus); 3178 } 3179 3180 // Note: must be done after the focus change callbacks, 3181 // so all of the view state is set up correctly. 3182 if (hasWindowFocus) { 3183 if (imm != null && mLastWasImTarget && !isInLocalFocusMode()) { 3184 imm.onWindowFocus(mView, mView.findFocus(), 3185 mWindowAttributes.softInputMode, 3186 !mHasHadWindowFocus, mWindowAttributes.flags); 3187 } 3188 // Clear the forward bit. We can just do this directly, since 3189 // the window manager doesn't care about it. 3190 mWindowAttributes.softInputMode &= 3191 ~WindowManager.LayoutParams.SOFT_INPUT_IS_FORWARD_NAVIGATION; 3192 ((WindowManager.LayoutParams)mView.getLayoutParams()) 3193 .softInputMode &= 3194 ~WindowManager.LayoutParams.SOFT_INPUT_IS_FORWARD_NAVIGATION; 3195 mHasHadWindowFocus = true; 3196 } 3197 3198 if (mView != null && mAccessibilityManager.isEnabled()) { 3199 if (hasWindowFocus) { 3200 mView.sendAccessibilityEvent( 3201 AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED); 3202 } 3203 } 3204 } 3205 } break; 3206 case MSG_DIE: 3207 doDie(); 3208 break; 3209 case MSG_DISPATCH_INPUT_EVENT: { 3210 SomeArgs args = (SomeArgs)msg.obj; 3211 InputEvent event = (InputEvent)args.arg1; 3212 InputEventReceiver receiver = (InputEventReceiver)args.arg2; 3213 enqueueInputEvent(event, receiver, 0, true); 3214 args.recycle(); 3215 } break; 3216 case MSG_SYNTHESIZE_INPUT_EVENT: { 3217 InputEvent event = (InputEvent)msg.obj; 3218 enqueueInputEvent(event, null, QueuedInputEvent.FLAG_UNHANDLED, true); 3219 } break; 3220 case MSG_DISPATCH_KEY_FROM_IME: { 3221 if (LOCAL_LOGV) Log.v( 3222 TAG, "Dispatching key " 3223 + msg.obj + " from IME to " + mView); 3224 KeyEvent event = (KeyEvent)msg.obj; 3225 if ((event.getFlags()&KeyEvent.FLAG_FROM_SYSTEM) != 0) { 3226 // The IME is trying to say this event is from the 3227 // system! Bad bad bad! 3228 //noinspection UnusedAssignment 3229 event = KeyEvent.changeFlags(event, event.getFlags() & 3230 ~KeyEvent.FLAG_FROM_SYSTEM); 3231 } 3232 enqueueInputEvent(event, null, QueuedInputEvent.FLAG_DELIVER_POST_IME, true); 3233 } break; 3234 case MSG_FINISH_INPUT_CONNECTION: { 3235 InputMethodManager imm = InputMethodManager.peekInstance(); 3236 if (imm != null) { 3237 imm.reportFinishInputConnection((InputConnection)msg.obj); 3238 } 3239 } break; 3240 case MSG_CHECK_FOCUS: { 3241 InputMethodManager imm = InputMethodManager.peekInstance(); 3242 if (imm != null) { 3243 imm.checkFocus(); 3244 } 3245 } break; 3246 case MSG_CLOSE_SYSTEM_DIALOGS: { 3247 if (mView != null) { 3248 mView.onCloseSystemDialogs((String)msg.obj); 3249 } 3250 } break; 3251 case MSG_DISPATCH_DRAG_EVENT: 3252 case MSG_DISPATCH_DRAG_LOCATION_EVENT: { 3253 DragEvent event = (DragEvent)msg.obj; 3254 event.mLocalState = mLocalDragState; // only present when this app called startDrag() 3255 handleDragEvent(event); 3256 } break; 3257 case MSG_DISPATCH_SYSTEM_UI_VISIBILITY: { 3258 handleDispatchSystemUiVisibilityChanged((SystemUiVisibilityInfo) msg.obj); 3259 } break; 3260 case MSG_UPDATE_CONFIGURATION: { 3261 Configuration config = (Configuration)msg.obj; 3262 if (config.isOtherSeqNewer(mLastConfiguration)) { 3263 config = mLastConfiguration; 3264 } 3265 updateConfiguration(config, false); 3266 } break; 3267 case MSG_CLEAR_ACCESSIBILITY_FOCUS_HOST: { 3268 setAccessibilityFocus(null, null); 3269 } break; 3270 case MSG_DISPATCH_DONE_ANIMATING: { 3271 handleDispatchDoneAnimating(); 3272 } break; 3273 case MSG_INVALIDATE_WORLD: { 3274 if (mView != null) { 3275 invalidateWorld(mView); 3276 } 3277 } break; 3278 case MSG_FLUSH_LAYER_UPDATES: { 3279 flushHardwareLayerUpdates(); 3280 } break; 3281 } 3282 } 3283 } 3284 3285 final ViewRootHandler mHandler = new ViewRootHandler(); 3286 3287 /** 3288 * Something in the current window tells us we need to change the touch mode. For 3289 * example, we are not in touch mode, and the user touches the screen. 3290 * 3291 * If the touch mode has changed, tell the window manager, and handle it locally. 3292 * 3293 * @param inTouchMode Whether we want to be in touch mode. 3294 * @return True if the touch mode changed and focus changed was changed as a result 3295 */ 3296 boolean ensureTouchMode(boolean inTouchMode) { 3297 if (DBG) Log.d("touchmode", "ensureTouchMode(" + inTouchMode + "), current " 3298 + "touch mode is " + mAttachInfo.mInTouchMode); 3299 if (mAttachInfo.mInTouchMode == inTouchMode) return false; 3300 3301 // tell the window manager 3302 try { 3303 if (!isInLocalFocusMode()) { 3304 mWindowSession.setInTouchMode(inTouchMode); 3305 } 3306 } catch (RemoteException e) { 3307 throw new RuntimeException(e); 3308 } 3309 3310 // handle the change 3311 return ensureTouchModeLocally(inTouchMode); 3312 } 3313 3314 /** 3315 * Ensure that the touch mode for this window is set, and if it is changing, 3316 * take the appropriate action. 3317 * @param inTouchMode Whether we want to be in touch mode. 3318 * @return True if the touch mode changed and focus changed was changed as a result 3319 */ 3320 private boolean ensureTouchModeLocally(boolean inTouchMode) { 3321 if (DBG) Log.d("touchmode", "ensureTouchModeLocally(" + inTouchMode + "), current " 3322 + "touch mode is " + mAttachInfo.mInTouchMode); 3323 3324 if (mAttachInfo.mInTouchMode == inTouchMode) return false; 3325 3326 mAttachInfo.mInTouchMode = inTouchMode; 3327 mAttachInfo.mTreeObserver.dispatchOnTouchModeChanged(inTouchMode); 3328 3329 return (inTouchMode) ? enterTouchMode() : leaveTouchMode(); 3330 } 3331 3332 private boolean enterTouchMode() { 3333 if (mView != null && mView.hasFocus()) { 3334 // note: not relying on mFocusedView here because this could 3335 // be when the window is first being added, and mFocused isn't 3336 // set yet. 3337 final View focused = mView.findFocus(); 3338 if (focused != null && !focused.isFocusableInTouchMode()) { 3339 final ViewGroup ancestorToTakeFocus = findAncestorToTakeFocusInTouchMode(focused); 3340 if (ancestorToTakeFocus != null) { 3341 // there is an ancestor that wants focus after its 3342 // descendants that is focusable in touch mode.. give it 3343 // focus 3344 return ancestorToTakeFocus.requestFocus(); 3345 } else { 3346 // There's nothing to focus. Clear and propagate through the 3347 // hierarchy, but don't attempt to place new focus. 3348 focused.clearFocusInternal(null, true, false); 3349 return true; 3350 } 3351 } 3352 } 3353 return false; 3354 } 3355 3356 /** 3357 * Find an ancestor of focused that wants focus after its descendants and is 3358 * focusable in touch mode. 3359 * @param focused The currently focused view. 3360 * @return An appropriate view, or null if no such view exists. 3361 */ 3362 private static ViewGroup findAncestorToTakeFocusInTouchMode(View focused) { 3363 ViewParent parent = focused.getParent(); 3364 while (parent instanceof ViewGroup) { 3365 final ViewGroup vgParent = (ViewGroup) parent; 3366 if (vgParent.getDescendantFocusability() == ViewGroup.FOCUS_AFTER_DESCENDANTS 3367 && vgParent.isFocusableInTouchMode()) { 3368 return vgParent; 3369 } 3370 if (vgParent.isRootNamespace()) { 3371 return null; 3372 } else { 3373 parent = vgParent.getParent(); 3374 } 3375 } 3376 return null; 3377 } 3378 3379 private boolean leaveTouchMode() { 3380 if (mView != null) { 3381 if (mView.hasFocus()) { 3382 View focusedView = mView.findFocus(); 3383 if (!(focusedView instanceof ViewGroup)) { 3384 // some view has focus, let it keep it 3385 return false; 3386 } else if (((ViewGroup) focusedView).getDescendantFocusability() != 3387 ViewGroup.FOCUS_AFTER_DESCENDANTS) { 3388 // some view group has focus, and doesn't prefer its children 3389 // over itself for focus, so let them keep it. 3390 return false; 3391 } 3392 } 3393 3394 // find the best view to give focus to in this brave new non-touch-mode 3395 // world 3396 final View focused = focusSearch(null, View.FOCUS_DOWN); 3397 if (focused != null) { 3398 return focused.requestFocus(View.FOCUS_DOWN); 3399 } 3400 } 3401 return false; 3402 } 3403 3404 /** 3405 * Base class for implementing a stage in the chain of responsibility 3406 * for processing input events. 3407 * <p> 3408 * Events are delivered to the stage by the {@link #deliver} method. The stage 3409 * then has the choice of finishing the event or forwarding it to the next stage. 3410 * </p> 3411 */ 3412 abstract class InputStage { 3413 private final InputStage mNext; 3414 3415 protected static final int FORWARD = 0; 3416 protected static final int FINISH_HANDLED = 1; 3417 protected static final int FINISH_NOT_HANDLED = 2; 3418 3419 /** 3420 * Creates an input stage. 3421 * @param next The next stage to which events should be forwarded. 3422 */ 3423 public InputStage(InputStage next) { 3424 mNext = next; 3425 } 3426 3427 /** 3428 * Delivers an event to be processed. 3429 */ 3430 public final void deliver(QueuedInputEvent q) { 3431 if ((q.mFlags & QueuedInputEvent.FLAG_FINISHED) != 0) { 3432 forward(q); 3433 } else if (shouldDropInputEvent(q)) { 3434 finish(q, false); 3435 } else { 3436 apply(q, onProcess(q)); 3437 } 3438 } 3439 3440 /** 3441 * Marks the the input event as finished then forwards it to the next stage. 3442 */ 3443 protected void finish(QueuedInputEvent q, boolean handled) { 3444 q.mFlags |= QueuedInputEvent.FLAG_FINISHED; 3445 if (handled) { 3446 q.mFlags |= QueuedInputEvent.FLAG_FINISHED_HANDLED; 3447 } 3448 forward(q); 3449 } 3450 3451 /** 3452 * Forwards the event to the next stage. 3453 */ 3454 protected void forward(QueuedInputEvent q) { 3455 onDeliverToNext(q); 3456 } 3457 3458 /** 3459 * Applies a result code from {@link #onProcess} to the specified event. 3460 */ 3461 protected void apply(QueuedInputEvent q, int result) { 3462 if (result == FORWARD) { 3463 forward(q); 3464 } else if (result == FINISH_HANDLED) { 3465 finish(q, true); 3466 } else if (result == FINISH_NOT_HANDLED) { 3467 finish(q, false); 3468 } else { 3469 throw new IllegalArgumentException("Invalid result: " + result); 3470 } 3471 } 3472 3473 /** 3474 * Called when an event is ready to be processed. 3475 * @return A result code indicating how the event was handled. 3476 */ 3477 protected int onProcess(QueuedInputEvent q) { 3478 return FORWARD; 3479 } 3480 3481 /** 3482 * Called when an event is being delivered to the next stage. 3483 */ 3484 protected void onDeliverToNext(QueuedInputEvent q) { 3485 if (DEBUG_INPUT_STAGES) { 3486 Log.v(TAG, "Done with " + getClass().getSimpleName() + ". " + q); 3487 } 3488 if (mNext != null) { 3489 mNext.deliver(q); 3490 } else { 3491 finishInputEvent(q); 3492 } 3493 } 3494 3495 protected boolean shouldDropInputEvent(QueuedInputEvent q) { 3496 if (mView == null || !mAdded) { 3497 Slog.w(TAG, "Dropping event due to root view being removed: " + q.mEvent); 3498 return true; 3499 } else if (!mAttachInfo.mHasWindowFocus && 3500 !q.mEvent.isFromSource(InputDevice.SOURCE_CLASS_POINTER) && 3501 !isTerminalInputEvent(q.mEvent)) { 3502 // If this is a focused event and the window doesn't currently have input focus, 3503 // then drop this event. This could be an event that came back from the previous 3504 // stage but the window has lost focus in the meantime. 3505 Slog.w(TAG, "Dropping event due to no window focus: " + q.mEvent); 3506 return true; 3507 } 3508 return false; 3509 } 3510 3511 void dump(String prefix, PrintWriter writer) { 3512 if (mNext != null) { 3513 mNext.dump(prefix, writer); 3514 } 3515 } 3516 } 3517 3518 /** 3519 * Base class for implementing an input pipeline stage that supports 3520 * asynchronous and out-of-order processing of input events. 3521 * <p> 3522 * In addition to what a normal input stage can do, an asynchronous 3523 * input stage may also defer an input event that has been delivered to it 3524 * and finish or forward it later. 3525 * </p> 3526 */ 3527 abstract class AsyncInputStage extends InputStage { 3528 private final String mTraceCounter; 3529 3530 private QueuedInputEvent mQueueHead; 3531 private QueuedInputEvent mQueueTail; 3532 private int mQueueLength; 3533 3534 protected static final int DEFER = 3; 3535 3536 /** 3537 * Creates an asynchronous input stage. 3538 * @param next The next stage to which events should be forwarded. 3539 * @param traceCounter The name of a counter to record the size of 3540 * the queue of pending events. 3541 */ 3542 public AsyncInputStage(InputStage next, String traceCounter) { 3543 super(next); 3544 mTraceCounter = traceCounter; 3545 } 3546 3547 /** 3548 * Marks the event as deferred, which is to say that it will be handled 3549 * asynchronously. The caller is responsible for calling {@link #forward} 3550 * or {@link #finish} later when it is done handling the event. 3551 */ 3552 protected void defer(QueuedInputEvent q) { 3553 q.mFlags |= QueuedInputEvent.FLAG_DEFERRED; 3554 enqueue(q); 3555 } 3556 3557 @Override 3558 protected void forward(QueuedInputEvent q) { 3559 // Clear the deferred flag. 3560 q.mFlags &= ~QueuedInputEvent.FLAG_DEFERRED; 3561 3562 // Fast path if the queue is empty. 3563 QueuedInputEvent curr = mQueueHead; 3564 if (curr == null) { 3565 super.forward(q); 3566 return; 3567 } 3568 3569 // Determine whether the event must be serialized behind any others 3570 // before it can be delivered to the next stage. This is done because 3571 // deferred events might be handled out of order by the stage. 3572 final int deviceId = q.mEvent.getDeviceId(); 3573 QueuedInputEvent prev = null; 3574 boolean blocked = false; 3575 while (curr != null && curr != q) { 3576 if (!blocked && deviceId == curr.mEvent.getDeviceId()) { 3577 blocked = true; 3578 } 3579 prev = curr; 3580 curr = curr.mNext; 3581 } 3582 3583 // If the event is blocked, then leave it in the queue to be delivered later. 3584 // Note that the event might not yet be in the queue if it was not previously 3585 // deferred so we will enqueue it if needed. 3586 if (blocked) { 3587 if (curr == null) { 3588 enqueue(q); 3589 } 3590 return; 3591 } 3592 3593 // The event is not blocked. Deliver it immediately. 3594 if (curr != null) { 3595 curr = curr.mNext; 3596 dequeue(q, prev); 3597 } 3598 super.forward(q); 3599 3600 // Dequeuing this event may have unblocked successors. Deliver them. 3601 while (curr != null) { 3602 if (deviceId == curr.mEvent.getDeviceId()) { 3603 if ((curr.mFlags & QueuedInputEvent.FLAG_DEFERRED) != 0) { 3604 break; 3605 } 3606 QueuedInputEvent next = curr.mNext; 3607 dequeue(curr, prev); 3608 super.forward(curr); 3609 curr = next; 3610 } else { 3611 prev = curr; 3612 curr = curr.mNext; 3613 } 3614 } 3615 } 3616 3617 @Override 3618 protected void apply(QueuedInputEvent q, int result) { 3619 if (result == DEFER) { 3620 defer(q); 3621 } else { 3622 super.apply(q, result); 3623 } 3624 } 3625 3626 private void enqueue(QueuedInputEvent q) { 3627 if (mQueueTail == null) { 3628 mQueueHead = q; 3629 mQueueTail = q; 3630 } else { 3631 mQueueTail.mNext = q; 3632 mQueueTail = q; 3633 } 3634 3635 mQueueLength += 1; 3636 Trace.traceCounter(Trace.TRACE_TAG_INPUT, mTraceCounter, mQueueLength); 3637 } 3638 3639 private void dequeue(QueuedInputEvent q, QueuedInputEvent prev) { 3640 if (prev == null) { 3641 mQueueHead = q.mNext; 3642 } else { 3643 prev.mNext = q.mNext; 3644 } 3645 if (mQueueTail == q) { 3646 mQueueTail = prev; 3647 } 3648 q.mNext = null; 3649 3650 mQueueLength -= 1; 3651 Trace.traceCounter(Trace.TRACE_TAG_INPUT, mTraceCounter, mQueueLength); 3652 } 3653 3654 @Override 3655 void dump(String prefix, PrintWriter writer) { 3656 writer.print(prefix); 3657 writer.print(getClass().getName()); 3658 writer.print(": mQueueLength="); 3659 writer.println(mQueueLength); 3660 3661 super.dump(prefix, writer); 3662 } 3663 } 3664 3665 /** 3666 * Delivers pre-ime input events to a native activity. 3667 * Does not support pointer events. 3668 */ 3669 final class NativePreImeInputStage extends AsyncInputStage 3670 implements InputQueue.FinishedInputEventCallback { 3671 public NativePreImeInputStage(InputStage next, String traceCounter) { 3672 super(next, traceCounter); 3673 } 3674 3675 @Override 3676 protected int onProcess(QueuedInputEvent q) { 3677 if (mInputQueue != null && q.mEvent instanceof KeyEvent) { 3678 mInputQueue.sendInputEvent(q.mEvent, q, true, this); 3679 return DEFER; 3680 } 3681 return FORWARD; 3682 } 3683 3684 @Override 3685 public void onFinishedInputEvent(Object token, boolean handled) { 3686 QueuedInputEvent q = (QueuedInputEvent)token; 3687 if (handled) { 3688 finish(q, true); 3689 return; 3690 } 3691 forward(q); 3692 } 3693 } 3694 3695 /** 3696 * Delivers pre-ime input events to the view hierarchy. 3697 * Does not support pointer events. 3698 */ 3699 final class ViewPreImeInputStage extends InputStage { 3700 public ViewPreImeInputStage(InputStage next) { 3701 super(next); 3702 } 3703 3704 @Override 3705 protected int onProcess(QueuedInputEvent q) { 3706 if (q.mEvent instanceof KeyEvent) { 3707 return processKeyEvent(q); 3708 } 3709 return FORWARD; 3710 } 3711 3712 private int processKeyEvent(QueuedInputEvent q) { 3713 final KeyEvent event = (KeyEvent)q.mEvent; 3714 if (mView.dispatchKeyEventPreIme(event)) { 3715 return FINISH_HANDLED; 3716 } 3717 return FORWARD; 3718 } 3719 } 3720 3721 /** 3722 * Delivers input events to the ime. 3723 * Does not support pointer events. 3724 */ 3725 final class ImeInputStage extends AsyncInputStage 3726 implements InputMethodManager.FinishedInputEventCallback { 3727 public ImeInputStage(InputStage next, String traceCounter) { 3728 super(next, traceCounter); 3729 } 3730 3731 @Override 3732 protected int onProcess(QueuedInputEvent q) { 3733 if (mLastWasImTarget && !isInLocalFocusMode()) { 3734 InputMethodManager imm = InputMethodManager.peekInstance(); 3735 if (imm != null) { 3736 final InputEvent event = q.mEvent; 3737 if (DEBUG_IMF) Log.v(TAG, "Sending input event to IME: " + event); 3738 int result = imm.dispatchInputEvent(event, q, this, mHandler); 3739 if (result == InputMethodManager.DISPATCH_HANDLED) { 3740 return FINISH_HANDLED; 3741 } else if (result == InputMethodManager.DISPATCH_NOT_HANDLED) { 3742 // The IME could not handle it, so skip along to the next InputStage 3743 return FORWARD; 3744 } else { 3745 return DEFER; // callback will be invoked later 3746 } 3747 } 3748 } 3749 return FORWARD; 3750 } 3751 3752 @Override 3753 public void onFinishedInputEvent(Object token, boolean handled) { 3754 QueuedInputEvent q = (QueuedInputEvent)token; 3755 if (handled) { 3756 finish(q, true); 3757 return; 3758 } 3759 forward(q); 3760 } 3761 } 3762 3763 /** 3764 * Performs early processing of post-ime input events. 3765 */ 3766 final class EarlyPostImeInputStage extends InputStage { 3767 public EarlyPostImeInputStage(InputStage next) { 3768 super(next); 3769 } 3770 3771 @Override 3772 protected int onProcess(QueuedInputEvent q) { 3773 if (q.mEvent instanceof KeyEvent) { 3774 return processKeyEvent(q); 3775 } else { 3776 final int source = q.mEvent.getSource(); 3777 if ((source & InputDevice.SOURCE_CLASS_POINTER) != 0) { 3778 return processPointerEvent(q); 3779 } 3780 } 3781 return FORWARD; 3782 } 3783 3784 private int processKeyEvent(QueuedInputEvent q) { 3785 final KeyEvent event = (KeyEvent)q.mEvent; 3786 3787 // If the key's purpose is to exit touch mode then we consume it 3788 // and consider it handled. 3789 if (checkForLeavingTouchModeAndConsume(event)) { 3790 return FINISH_HANDLED; 3791 } 3792 3793 // Make sure the fallback event policy sees all keys that will be 3794 // delivered to the view hierarchy. 3795 mFallbackEventHandler.preDispatchKeyEvent(event); 3796 return FORWARD; 3797 } 3798 3799 private int processPointerEvent(QueuedInputEvent q) { 3800 final MotionEvent event = (MotionEvent)q.mEvent; 3801 3802 // Translate the pointer event for compatibility, if needed. 3803 if (mTranslator != null) { 3804 mTranslator.translateEventInScreenToAppWindow(event); 3805 } 3806 3807 // Enter touch mode on down or scroll. 3808 final int action = event.getAction(); 3809 if (action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_SCROLL) { 3810 ensureTouchMode(true); 3811 } 3812 3813 // Offset the scroll position. 3814 if (mCurScrollY != 0) { 3815 event.offsetLocation(0, mCurScrollY); 3816 } 3817 3818 // Remember the touch position for possible drag-initiation. 3819 if (event.isTouchEvent()) { 3820 mLastTouchPoint.x = event.getRawX(); 3821 mLastTouchPoint.y = event.getRawY(); 3822 } 3823 return FORWARD; 3824 } 3825 } 3826 3827 /** 3828 * Delivers post-ime input events to a native activity. 3829 */ 3830 final class NativePostImeInputStage extends AsyncInputStage 3831 implements InputQueue.FinishedInputEventCallback { 3832 public NativePostImeInputStage(InputStage next, String traceCounter) { 3833 super(next, traceCounter); 3834 } 3835 3836 @Override 3837 protected int onProcess(QueuedInputEvent q) { 3838 if (mInputQueue != null) { 3839 mInputQueue.sendInputEvent(q.mEvent, q, false, this); 3840 return DEFER; 3841 } 3842 return FORWARD; 3843 } 3844 3845 @Override 3846 public void onFinishedInputEvent(Object token, boolean handled) { 3847 QueuedInputEvent q = (QueuedInputEvent)token; 3848 if (handled) { 3849 finish(q, true); 3850 return; 3851 } 3852 forward(q); 3853 } 3854 } 3855 3856 /** 3857 * Delivers post-ime input events to the view hierarchy. 3858 */ 3859 final class ViewPostImeInputStage extends InputStage { 3860 public ViewPostImeInputStage(InputStage next) { 3861 super(next); 3862 } 3863 3864 @Override 3865 protected int onProcess(QueuedInputEvent q) { 3866 if (q.mEvent instanceof KeyEvent) { 3867 return processKeyEvent(q); 3868 } else { 3869 // If delivering a new non-key event, make sure the window is 3870 // now allowed to start updating. 3871 handleDispatchDoneAnimating(); 3872 final int source = q.mEvent.getSource(); 3873 if ((source & InputDevice.SOURCE_CLASS_POINTER) != 0) { 3874 return processPointerEvent(q); 3875 } else if ((source & InputDevice.SOURCE_CLASS_TRACKBALL) != 0) { 3876 return processTrackballEvent(q); 3877 } else { 3878 return processGenericMotionEvent(q); 3879 } 3880 } 3881 } 3882 3883 private int processKeyEvent(QueuedInputEvent q) { 3884 final KeyEvent event = (KeyEvent)q.mEvent; 3885 3886 if (event.getAction() != KeyEvent.ACTION_UP) { 3887 // If delivering a new key event, make sure the window is 3888 // now allowed to start updating. 3889 handleDispatchDoneAnimating(); 3890 } 3891 3892 // Deliver the key to the view hierarchy. 3893 if (mView.dispatchKeyEvent(event)) { 3894 return FINISH_HANDLED; 3895 } 3896 3897 if (shouldDropInputEvent(q)) { 3898 return FINISH_NOT_HANDLED; 3899 } 3900 3901 // If the Control modifier is held, try to interpret the key as a shortcut. 3902 if (event.getAction() == KeyEvent.ACTION_DOWN 3903 && event.isCtrlPressed() 3904 && event.getRepeatCount() == 0 3905 && !KeyEvent.isModifierKey(event.getKeyCode())) { 3906 if (mView.dispatchKeyShortcutEvent(event)) { 3907 return FINISH_HANDLED; 3908 } 3909 if (shouldDropInputEvent(q)) { 3910 return FINISH_NOT_HANDLED; 3911 } 3912 } 3913 3914 // Apply the fallback event policy. 3915 if (mFallbackEventHandler.dispatchKeyEvent(event)) { 3916 return FINISH_HANDLED; 3917 } 3918 if (shouldDropInputEvent(q)) { 3919 return FINISH_NOT_HANDLED; 3920 } 3921 3922 // Handle automatic focus changes. 3923 if (event.getAction() == KeyEvent.ACTION_DOWN) { 3924 int direction = 0; 3925 switch (event.getKeyCode()) { 3926 case KeyEvent.KEYCODE_DPAD_LEFT: 3927 if (event.hasNoModifiers()) { 3928 direction = View.FOCUS_LEFT; 3929 } 3930 break; 3931 case KeyEvent.KEYCODE_DPAD_RIGHT: 3932 if (event.hasNoModifiers()) { 3933 direction = View.FOCUS_RIGHT; 3934 } 3935 break; 3936 case KeyEvent.KEYCODE_DPAD_UP: 3937 if (event.hasNoModifiers()) { 3938 direction = View.FOCUS_UP; 3939 } 3940 break; 3941 case KeyEvent.KEYCODE_DPAD_DOWN: 3942 if (event.hasNoModifiers()) { 3943 direction = View.FOCUS_DOWN; 3944 } 3945 break; 3946 case KeyEvent.KEYCODE_TAB: 3947 if (event.hasNoModifiers()) { 3948 direction = View.FOCUS_FORWARD; 3949 } else if (event.hasModifiers(KeyEvent.META_SHIFT_ON)) { 3950 direction = View.FOCUS_BACKWARD; 3951 } 3952 break; 3953 } 3954 if (direction != 0) { 3955 View focused = mView.findFocus(); 3956 if (focused != null) { 3957 View v = focused.focusSearch(direction); 3958 if (v != null && v != focused) { 3959 // do the math the get the interesting rect 3960 // of previous focused into the coord system of 3961 // newly focused view 3962 focused.getFocusedRect(mTempRect); 3963 if (mView instanceof ViewGroup) { 3964 ((ViewGroup) mView).offsetDescendantRectToMyCoords( 3965 focused, mTempRect); 3966 ((ViewGroup) mView).offsetRectIntoDescendantCoords( 3967 v, mTempRect); 3968 } 3969 if (v.requestFocus(direction, mTempRect)) { 3970 playSoundEffect(SoundEffectConstants 3971 .getContantForFocusDirection(direction)); 3972 return FINISH_HANDLED; 3973 } 3974 } 3975 3976 // Give the focused view a last chance to handle the dpad key. 3977 if (mView.dispatchUnhandledMove(focused, direction)) { 3978 return FINISH_HANDLED; 3979 } 3980 } else { 3981 // find the best view to give focus to in this non-touch-mode with no-focus 3982 View v = focusSearch(null, direction); 3983 if (v != null && v.requestFocus(direction)) { 3984 return FINISH_HANDLED; 3985 } 3986 } 3987 } 3988 } 3989 return FORWARD; 3990 } 3991 3992 private int processPointerEvent(QueuedInputEvent q) { 3993 final MotionEvent event = (MotionEvent)q.mEvent; 3994 3995 if (mView.dispatchPointerEvent(event)) { 3996 return FINISH_HANDLED; 3997 } 3998 return FORWARD; 3999 } 4000 4001 private int processTrackballEvent(QueuedInputEvent q) { 4002 final MotionEvent event = (MotionEvent)q.mEvent; 4003 4004 if (mView.dispatchTrackballEvent(event)) { 4005 return FINISH_HANDLED; 4006 } 4007 return FORWARD; 4008 } 4009 4010 private int processGenericMotionEvent(QueuedInputEvent q) { 4011 final MotionEvent event = (MotionEvent)q.mEvent; 4012 4013 // Deliver the event to the view. 4014 if (mView.dispatchGenericMotionEvent(event)) { 4015 return FINISH_HANDLED; 4016 } 4017 return FORWARD; 4018 } 4019 } 4020 4021 /** 4022 * Performs synthesis of new input events from unhandled input events. 4023 */ 4024 final class SyntheticInputStage extends InputStage { 4025 private final SyntheticTrackballHandler mTrackball = new SyntheticTrackballHandler(); 4026 private final SyntheticJoystickHandler mJoystick = new SyntheticJoystickHandler(); 4027 private final SyntheticTouchNavigationHandler mTouchNavigation = 4028 new SyntheticTouchNavigationHandler(); 4029 private final SyntheticKeyboardHandler mKeyboard = new SyntheticKeyboardHandler(); 4030 4031 public SyntheticInputStage() { 4032 super(null); 4033 } 4034 4035 @Override 4036 protected int onProcess(QueuedInputEvent q) { 4037 q.mFlags |= QueuedInputEvent.FLAG_RESYNTHESIZED; 4038 if (q.mEvent instanceof MotionEvent) { 4039 final MotionEvent event = (MotionEvent)q.mEvent; 4040 final int source = event.getSource(); 4041 if ((source & InputDevice.SOURCE_CLASS_TRACKBALL) != 0) { 4042 mTrackball.process(event); 4043 return FINISH_HANDLED; 4044 } else if ((source & InputDevice.SOURCE_CLASS_JOYSTICK) != 0) { 4045 mJoystick.process(event); 4046 return FINISH_HANDLED; 4047 } else if ((source & InputDevice.SOURCE_TOUCH_NAVIGATION) 4048 == InputDevice.SOURCE_TOUCH_NAVIGATION) { 4049 mTouchNavigation.process(event); 4050 return FINISH_HANDLED; 4051 } 4052 } else if ((q.mFlags & QueuedInputEvent.FLAG_UNHANDLED) != 0) { 4053 mKeyboard.process((KeyEvent)q.mEvent); 4054 return FINISH_HANDLED; 4055 } 4056 4057 return FORWARD; 4058 } 4059 4060 @Override 4061 protected void onDeliverToNext(QueuedInputEvent q) { 4062 if ((q.mFlags & QueuedInputEvent.FLAG_RESYNTHESIZED) == 0) { 4063 // Cancel related synthetic events if any prior stage has handled the event. 4064 if (q.mEvent instanceof MotionEvent) { 4065 final MotionEvent event = (MotionEvent)q.mEvent; 4066 final int source = event.getSource(); 4067 if ((source & InputDevice.SOURCE_CLASS_TRACKBALL) != 0) { 4068 mTrackball.cancel(event); 4069 } else if ((source & InputDevice.SOURCE_CLASS_JOYSTICK) != 0) { 4070 mJoystick.cancel(event); 4071 } else if ((source & InputDevice.SOURCE_TOUCH_NAVIGATION) 4072 == InputDevice.SOURCE_TOUCH_NAVIGATION) { 4073 mTouchNavigation.cancel(event); 4074 } 4075 } 4076 } 4077 super.onDeliverToNext(q); 4078 } 4079 } 4080 4081 /** 4082 * Creates dpad events from unhandled trackball movements. 4083 */ 4084 final class SyntheticTrackballHandler { 4085 private final TrackballAxis mX = new TrackballAxis(); 4086 private final TrackballAxis mY = new TrackballAxis(); 4087 private long mLastTime; 4088 4089 public void process(MotionEvent event) { 4090 // Translate the trackball event into DPAD keys and try to deliver those. 4091 long curTime = SystemClock.uptimeMillis(); 4092 if ((mLastTime + MAX_TRACKBALL_DELAY) < curTime) { 4093 // It has been too long since the last movement, 4094 // so restart at the beginning. 4095 mX.reset(0); 4096 mY.reset(0); 4097 mLastTime = curTime; 4098 } 4099 4100 final int action = event.getAction(); 4101 final int metaState = event.getMetaState(); 4102 switch (action) { 4103 case MotionEvent.ACTION_DOWN: 4104 mX.reset(2); 4105 mY.reset(2); 4106 enqueueInputEvent(new KeyEvent(curTime, curTime, 4107 KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DPAD_CENTER, 0, metaState, 4108 KeyCharacterMap.VIRTUAL_KEYBOARD, 0, KeyEvent.FLAG_FALLBACK, 4109 InputDevice.SOURCE_KEYBOARD)); 4110 break; 4111 case MotionEvent.ACTION_UP: 4112 mX.reset(2); 4113 mY.reset(2); 4114 enqueueInputEvent(new KeyEvent(curTime, curTime, 4115 KeyEvent.ACTION_UP, KeyEvent.KEYCODE_DPAD_CENTER, 0, metaState, 4116 KeyCharacterMap.VIRTUAL_KEYBOARD, 0, KeyEvent.FLAG_FALLBACK, 4117 InputDevice.SOURCE_KEYBOARD)); 4118 break; 4119 } 4120 4121 if (DEBUG_TRACKBALL) Log.v(TAG, "TB X=" + mX.position + " step=" 4122 + mX.step + " dir=" + mX.dir + " acc=" + mX.acceleration 4123 + " move=" + event.getX() 4124 + " / Y=" + mY.position + " step=" 4125 + mY.step + " dir=" + mY.dir + " acc=" + mY.acceleration 4126 + " move=" + event.getY()); 4127 final float xOff = mX.collect(event.getX(), event.getEventTime(), "X"); 4128 final float yOff = mY.collect(event.getY(), event.getEventTime(), "Y"); 4129 4130 // Generate DPAD events based on the trackball movement. 4131 // We pick the axis that has moved the most as the direction of 4132 // the DPAD. When we generate DPAD events for one axis, then the 4133 // other axis is reset -- we don't want to perform DPAD jumps due 4134 // to slight movements in the trackball when making major movements 4135 // along the other axis. 4136 int keycode = 0; 4137 int movement = 0; 4138 float accel = 1; 4139 if (xOff > yOff) { 4140 movement = mX.generate(); 4141 if (movement != 0) { 4142 keycode = movement > 0 ? KeyEvent.KEYCODE_DPAD_RIGHT 4143 : KeyEvent.KEYCODE_DPAD_LEFT; 4144 accel = mX.acceleration; 4145 mY.reset(2); 4146 } 4147 } else if (yOff > 0) { 4148 movement = mY.generate(); 4149 if (movement != 0) { 4150 keycode = movement > 0 ? KeyEvent.KEYCODE_DPAD_DOWN 4151 : KeyEvent.KEYCODE_DPAD_UP; 4152 accel = mY.acceleration; 4153 mX.reset(2); 4154 } 4155 } 4156 4157 if (keycode != 0) { 4158 if (movement < 0) movement = -movement; 4159 int accelMovement = (int)(movement * accel); 4160 if (DEBUG_TRACKBALL) Log.v(TAG, "Move: movement=" + movement 4161 + " accelMovement=" + accelMovement 4162 + " accel=" + accel); 4163 if (accelMovement > movement) { 4164 if (DEBUG_TRACKBALL) Log.v(TAG, "Delivering fake DPAD: " 4165 + keycode); 4166 movement--; 4167 int repeatCount = accelMovement - movement; 4168 enqueueInputEvent(new KeyEvent(curTime, curTime, 4169 KeyEvent.ACTION_MULTIPLE, keycode, repeatCount, metaState, 4170 KeyCharacterMap.VIRTUAL_KEYBOARD, 0, KeyEvent.FLAG_FALLBACK, 4171 InputDevice.SOURCE_KEYBOARD)); 4172 } 4173 while (movement > 0) { 4174 if (DEBUG_TRACKBALL) Log.v(TAG, "Delivering fake DPAD: " 4175 + keycode); 4176 movement--; 4177 curTime = SystemClock.uptimeMillis(); 4178 enqueueInputEvent(new KeyEvent(curTime, curTime, 4179 KeyEvent.ACTION_DOWN, keycode, 0, metaState, 4180 KeyCharacterMap.VIRTUAL_KEYBOARD, 0, KeyEvent.FLAG_FALLBACK, 4181 InputDevice.SOURCE_KEYBOARD)); 4182 enqueueInputEvent(new KeyEvent(curTime, curTime, 4183 KeyEvent.ACTION_UP, keycode, 0, metaState, 4184 KeyCharacterMap.VIRTUAL_KEYBOARD, 0, KeyEvent.FLAG_FALLBACK, 4185 InputDevice.SOURCE_KEYBOARD)); 4186 } 4187 mLastTime = curTime; 4188 } 4189 } 4190 4191 public void cancel(MotionEvent event) { 4192 mLastTime = Integer.MIN_VALUE; 4193 4194 // If we reach this, we consumed a trackball event. 4195 // Because we will not translate the trackball event into a key event, 4196 // touch mode will not exit, so we exit touch mode here. 4197 if (mView != null && mAdded) { 4198 ensureTouchMode(false); 4199 } 4200 } 4201 } 4202 4203 /** 4204 * Maintains state information for a single trackball axis, generating 4205 * discrete (DPAD) movements based on raw trackball motion. 4206 */ 4207 static final class TrackballAxis { 4208 /** 4209 * The maximum amount of acceleration we will apply. 4210 */ 4211 static final float MAX_ACCELERATION = 20; 4212 4213 /** 4214 * The maximum amount of time (in milliseconds) between events in order 4215 * for us to consider the user to be doing fast trackball movements, 4216 * and thus apply an acceleration. 4217 */ 4218 static final long FAST_MOVE_TIME = 150; 4219 4220 /** 4221 * Scaling factor to the time (in milliseconds) between events to how 4222 * much to multiple/divide the current acceleration. When movement 4223 * is < FAST_MOVE_TIME this multiplies the acceleration; when > 4224 * FAST_MOVE_TIME it divides it. 4225 */ 4226 static final float ACCEL_MOVE_SCALING_FACTOR = (1.0f/40); 4227 4228 static final float FIRST_MOVEMENT_THRESHOLD = 0.5f; 4229 static final float SECOND_CUMULATIVE_MOVEMENT_THRESHOLD = 2.0f; 4230 static final float SUBSEQUENT_INCREMENTAL_MOVEMENT_THRESHOLD = 1.0f; 4231 4232 float position; 4233 float acceleration = 1; 4234 long lastMoveTime = 0; 4235 int step; 4236 int dir; 4237 int nonAccelMovement; 4238 4239 void reset(int _step) { 4240 position = 0; 4241 acceleration = 1; 4242 lastMoveTime = 0; 4243 step = _step; 4244 dir = 0; 4245 } 4246 4247 /** 4248 * Add trackball movement into the state. If the direction of movement 4249 * has been reversed, the state is reset before adding the 4250 * movement (so that you don't have to compensate for any previously 4251 * collected movement before see the result of the movement in the 4252 * new direction). 4253 * 4254 * @return Returns the absolute value of the amount of movement 4255 * collected so far. 4256 */ 4257 float collect(float off, long time, String axis) { 4258 long normTime; 4259 if (off > 0) { 4260 normTime = (long)(off * FAST_MOVE_TIME); 4261 if (dir < 0) { 4262 if (DEBUG_TRACKBALL) Log.v(TAG, axis + " reversed to positive!"); 4263 position = 0; 4264 step = 0; 4265 acceleration = 1; 4266 lastMoveTime = 0; 4267 } 4268 dir = 1; 4269 } else if (off < 0) { 4270 normTime = (long)((-off) * FAST_MOVE_TIME); 4271 if (dir > 0) { 4272 if (DEBUG_TRACKBALL) Log.v(TAG, axis + " reversed to negative!"); 4273 position = 0; 4274 step = 0; 4275 acceleration = 1; 4276 lastMoveTime = 0; 4277 } 4278 dir = -1; 4279 } else { 4280 normTime = 0; 4281 } 4282 4283 // The number of milliseconds between each movement that is 4284 // considered "normal" and will not result in any acceleration 4285 // or deceleration, scaled by the offset we have here. 4286 if (normTime > 0) { 4287 long delta = time - lastMoveTime; 4288 lastMoveTime = time; 4289 float acc = acceleration; 4290 if (delta < normTime) { 4291 // The user is scrolling rapidly, so increase acceleration. 4292 float scale = (normTime-delta) * ACCEL_MOVE_SCALING_FACTOR; 4293 if (scale > 1) acc *= scale; 4294 if (DEBUG_TRACKBALL) Log.v(TAG, axis + " accelerate: off=" 4295 + off + " normTime=" + normTime + " delta=" + delta 4296 + " scale=" + scale + " acc=" + acc); 4297 acceleration = acc < MAX_ACCELERATION ? acc : MAX_ACCELERATION; 4298 } else { 4299 // The user is scrolling slowly, so decrease acceleration. 4300 float scale = (delta-normTime) * ACCEL_MOVE_SCALING_FACTOR; 4301 if (scale > 1) acc /= scale; 4302 if (DEBUG_TRACKBALL) Log.v(TAG, axis + " deccelerate: off=" 4303 + off + " normTime=" + normTime + " delta=" + delta 4304 + " scale=" + scale + " acc=" + acc); 4305 acceleration = acc > 1 ? acc : 1; 4306 } 4307 } 4308 position += off; 4309 return Math.abs(position); 4310 } 4311 4312 /** 4313 * Generate the number of discrete movement events appropriate for 4314 * the currently collected trackball movement. 4315 * 4316 * @return Returns the number of discrete movements, either positive 4317 * or negative, or 0 if there is not enough trackball movement yet 4318 * for a discrete movement. 4319 */ 4320 int generate() { 4321 int movement = 0; 4322 nonAccelMovement = 0; 4323 do { 4324 final int dir = position >= 0 ? 1 : -1; 4325 switch (step) { 4326 // If we are going to execute the first step, then we want 4327 // to do this as soon as possible instead of waiting for 4328 // a full movement, in order to make things look responsive. 4329 case 0: 4330 if (Math.abs(position) < FIRST_MOVEMENT_THRESHOLD) { 4331 return movement; 4332 } 4333 movement += dir; 4334 nonAccelMovement += dir; 4335 step = 1; 4336 break; 4337 // If we have generated the first movement, then we need 4338 // to wait for the second complete trackball motion before 4339 // generating the second discrete movement. 4340 case 1: 4341 if (Math.abs(position) < SECOND_CUMULATIVE_MOVEMENT_THRESHOLD) { 4342 return movement; 4343 } 4344 movement += dir; 4345 nonAccelMovement += dir; 4346 position -= SECOND_CUMULATIVE_MOVEMENT_THRESHOLD * dir; 4347 step = 2; 4348 break; 4349 // After the first two, we generate discrete movements 4350 // consistently with the trackball, applying an acceleration 4351 // if the trackball is moving quickly. This is a simple 4352 // acceleration on top of what we already compute based 4353 // on how quickly the wheel is being turned, to apply 4354 // a longer increasing acceleration to continuous movement 4355 // in one direction. 4356 default: 4357 if (Math.abs(position) < SUBSEQUENT_INCREMENTAL_MOVEMENT_THRESHOLD) { 4358 return movement; 4359 } 4360 movement += dir; 4361 position -= dir * SUBSEQUENT_INCREMENTAL_MOVEMENT_THRESHOLD; 4362 float acc = acceleration; 4363 acc *= 1.1f; 4364 acceleration = acc < MAX_ACCELERATION ? acc : acceleration; 4365 break; 4366 } 4367 } while (true); 4368 } 4369 } 4370 4371 /** 4372 * Creates dpad events from unhandled joystick movements. 4373 */ 4374 final class SyntheticJoystickHandler extends Handler { 4375 private final static String TAG = "SyntheticJoystickHandler"; 4376 private final static int MSG_ENQUEUE_X_AXIS_KEY_REPEAT = 1; 4377 private final static int MSG_ENQUEUE_Y_AXIS_KEY_REPEAT = 2; 4378 4379 private int mLastXDirection; 4380 private int mLastYDirection; 4381 private int mLastXKeyCode; 4382 private int mLastYKeyCode; 4383 4384 public SyntheticJoystickHandler() { 4385 super(true); 4386 } 4387 4388 @Override 4389 public void handleMessage(Message msg) { 4390 switch (msg.what) { 4391 case MSG_ENQUEUE_X_AXIS_KEY_REPEAT: 4392 case MSG_ENQUEUE_Y_AXIS_KEY_REPEAT: { 4393 KeyEvent oldEvent = (KeyEvent)msg.obj; 4394 KeyEvent e = KeyEvent.changeTimeRepeat(oldEvent, 4395 SystemClock.uptimeMillis(), 4396 oldEvent.getRepeatCount() + 1); 4397 if (mAttachInfo.mHasWindowFocus) { 4398 enqueueInputEvent(e); 4399 Message m = obtainMessage(msg.what, e); 4400 m.setAsynchronous(true); 4401 sendMessageDelayed(m, ViewConfiguration.getKeyRepeatDelay()); 4402 } 4403 } break; 4404 } 4405 } 4406 4407 public void process(MotionEvent event) { 4408 switch(event.getActionMasked()) { 4409 case MotionEvent.ACTION_CANCEL: 4410 cancel(event); 4411 break; 4412 case MotionEvent.ACTION_MOVE: 4413 update(event, true); 4414 break; 4415 default: 4416 Log.w(TAG, "Unexpected action: " + event.getActionMasked()); 4417 } 4418 } 4419 4420 private void cancel(MotionEvent event) { 4421 removeMessages(MSG_ENQUEUE_X_AXIS_KEY_REPEAT); 4422 removeMessages(MSG_ENQUEUE_Y_AXIS_KEY_REPEAT); 4423 update(event, false); 4424 } 4425 4426 private void update(MotionEvent event, boolean synthesizeNewKeys) { 4427 final long time = event.getEventTime(); 4428 final int metaState = event.getMetaState(); 4429 final int deviceId = event.getDeviceId(); 4430 final int source = event.getSource(); 4431 4432 int xDirection = joystickAxisValueToDirection( 4433 event.getAxisValue(MotionEvent.AXIS_HAT_X)); 4434 if (xDirection == 0) { 4435 xDirection = joystickAxisValueToDirection(event.getX()); 4436 } 4437 4438 int yDirection = joystickAxisValueToDirection( 4439 event.getAxisValue(MotionEvent.AXIS_HAT_Y)); 4440 if (yDirection == 0) { 4441 yDirection = joystickAxisValueToDirection(event.getY()); 4442 } 4443 4444 if (xDirection != mLastXDirection) { 4445 if (mLastXKeyCode != 0) { 4446 removeMessages(MSG_ENQUEUE_X_AXIS_KEY_REPEAT); 4447 enqueueInputEvent(new KeyEvent(time, time, 4448 KeyEvent.ACTION_UP, mLastXKeyCode, 0, metaState, 4449 deviceId, 0, KeyEvent.FLAG_FALLBACK, source)); 4450 mLastXKeyCode = 0; 4451 } 4452 4453 mLastXDirection = xDirection; 4454 4455 if (xDirection != 0 && synthesizeNewKeys) { 4456 mLastXKeyCode = xDirection > 0 4457 ? KeyEvent.KEYCODE_DPAD_RIGHT : KeyEvent.KEYCODE_DPAD_LEFT; 4458 final KeyEvent e = new KeyEvent(time, time, 4459 KeyEvent.ACTION_DOWN, mLastXKeyCode, 0, metaState, 4460 deviceId, 0, KeyEvent.FLAG_FALLBACK, source); 4461 enqueueInputEvent(e); 4462 Message m = obtainMessage(MSG_ENQUEUE_X_AXIS_KEY_REPEAT, e); 4463 m.setAsynchronous(true); 4464 sendMessageDelayed(m, ViewConfiguration.getKeyRepeatTimeout()); 4465 } 4466 } 4467 4468 if (yDirection != mLastYDirection) { 4469 if (mLastYKeyCode != 0) { 4470 removeMessages(MSG_ENQUEUE_Y_AXIS_KEY_REPEAT); 4471 enqueueInputEvent(new KeyEvent(time, time, 4472 KeyEvent.ACTION_UP, mLastYKeyCode, 0, metaState, 4473 deviceId, 0, KeyEvent.FLAG_FALLBACK, source)); 4474 mLastYKeyCode = 0; 4475 } 4476 4477 mLastYDirection = yDirection; 4478 4479 if (yDirection != 0 && synthesizeNewKeys) { 4480 mLastYKeyCode = yDirection > 0 4481 ? KeyEvent.KEYCODE_DPAD_DOWN : KeyEvent.KEYCODE_DPAD_UP; 4482 final KeyEvent e = new KeyEvent(time, time, 4483 KeyEvent.ACTION_DOWN, mLastYKeyCode, 0, metaState, 4484 deviceId, 0, KeyEvent.FLAG_FALLBACK, source); 4485 enqueueInputEvent(e); 4486 Message m = obtainMessage(MSG_ENQUEUE_Y_AXIS_KEY_REPEAT, e); 4487 m.setAsynchronous(true); 4488 sendMessageDelayed(m, ViewConfiguration.getKeyRepeatTimeout()); 4489 } 4490 } 4491 } 4492 4493 private int joystickAxisValueToDirection(float value) { 4494 if (value >= 0.5f) { 4495 return 1; 4496 } else if (value <= -0.5f) { 4497 return -1; 4498 } else { 4499 return 0; 4500 } 4501 } 4502 } 4503 4504 /** 4505 * Creates dpad events from unhandled touch navigation movements. 4506 */ 4507 final class SyntheticTouchNavigationHandler extends Handler { 4508 private static final String LOCAL_TAG = "SyntheticTouchNavigationHandler"; 4509 private static final boolean LOCAL_DEBUG = false; 4510 4511 // Assumed nominal width and height in millimeters of a touch navigation pad, 4512 // if no resolution information is available from the input system. 4513 private static final float DEFAULT_WIDTH_MILLIMETERS = 48; 4514 private static final float DEFAULT_HEIGHT_MILLIMETERS = 48; 4515 4516 /* TODO: These constants should eventually be moved to ViewConfiguration. */ 4517 4518 // The nominal distance traveled to move by one unit. 4519 private static final int TICK_DISTANCE_MILLIMETERS = 12; 4520 4521 // Minimum and maximum fling velocity in ticks per second. 4522 // The minimum velocity should be set such that we perform enough ticks per 4523 // second that the fling appears to be fluid. For example, if we set the minimum 4524 // to 2 ticks per second, then there may be up to half a second delay between the next 4525 // to last and last ticks which is noticeably discrete and jerky. This value should 4526 // probably not be set to anything less than about 4. 4527 // If fling accuracy is a problem then consider tuning the tick distance instead. 4528 private static final float MIN_FLING_VELOCITY_TICKS_PER_SECOND = 6f; 4529 private static final float MAX_FLING_VELOCITY_TICKS_PER_SECOND = 20f; 4530 4531 // Fling velocity decay factor applied after each new key is emitted. 4532 // This parameter controls the deceleration and overall duration of the fling. 4533 // The fling stops automatically when its velocity drops below the minimum 4534 // fling velocity defined above. 4535 private static final float FLING_TICK_DECAY = 0.8f; 4536 4537 /* The input device that we are tracking. */ 4538 4539 private int mCurrentDeviceId = -1; 4540 private int mCurrentSource; 4541 private boolean mCurrentDeviceSupported; 4542 4543 /* Configuration for the current input device. */ 4544 4545 // The scaled tick distance. A movement of this amount should generally translate 4546 // into a single dpad event in a given direction. 4547 private float mConfigTickDistance; 4548 4549 // The minimum and maximum scaled fling velocity. 4550 private float mConfigMinFlingVelocity; 4551 private float mConfigMaxFlingVelocity; 4552 4553 /* Tracking state. */ 4554 4555 // The velocity tracker for detecting flings. 4556 private VelocityTracker mVelocityTracker; 4557 4558 // The active pointer id, or -1 if none. 4559 private int mActivePointerId = -1; 4560 4561 // Location where tracking started. 4562 private float mStartX; 4563 private float mStartY; 4564 4565 // Most recently observed position. 4566 private float mLastX; 4567 private float mLastY; 4568 4569 // Accumulated movement delta since the last direction key was sent. 4570 private float mAccumulatedX; 4571 private float mAccumulatedY; 4572 4573 // Set to true if any movement was delivered to the app. 4574 // Implies that tap slop was exceeded. 4575 private boolean mConsumedMovement; 4576 4577 // The most recently sent key down event. 4578 // The keycode remains set until the direction changes or a fling ends 4579 // so that repeated key events may be generated as required. 4580 private long mPendingKeyDownTime; 4581 private int mPendingKeyCode = KeyEvent.KEYCODE_UNKNOWN; 4582 private int mPendingKeyRepeatCount; 4583 private int mPendingKeyMetaState; 4584 4585 // The current fling velocity while a fling is in progress. 4586 private boolean mFlinging; 4587 private float mFlingVelocity; 4588 4589 public SyntheticTouchNavigationHandler() { 4590 super(true); 4591 } 4592 4593 public void process(MotionEvent event) { 4594 // Update the current device information. 4595 final long time = event.getEventTime(); 4596 final int deviceId = event.getDeviceId(); 4597 final int source = event.getSource(); 4598 if (mCurrentDeviceId != deviceId || mCurrentSource != source) { 4599 finishKeys(time); 4600 finishTracking(time); 4601 mCurrentDeviceId = deviceId; 4602 mCurrentSource = source; 4603 mCurrentDeviceSupported = false; 4604 InputDevice device = event.getDevice(); 4605 if (device != null) { 4606 // In order to support an input device, we must know certain 4607 // characteristics about it, such as its size and resolution. 4608 InputDevice.MotionRange xRange = device.getMotionRange(MotionEvent.AXIS_X); 4609 InputDevice.MotionRange yRange = device.getMotionRange(MotionEvent.AXIS_Y); 4610 if (xRange != null && yRange != null) { 4611 mCurrentDeviceSupported = true; 4612 4613 // Infer the resolution if it not actually known. 4614 float xRes = xRange.getResolution(); 4615 if (xRes <= 0) { 4616 xRes = xRange.getRange() / DEFAULT_WIDTH_MILLIMETERS; 4617 } 4618 float yRes = yRange.getResolution(); 4619 if (yRes <= 0) { 4620 yRes = yRange.getRange() / DEFAULT_HEIGHT_MILLIMETERS; 4621 } 4622 float nominalRes = (xRes + yRes) * 0.5f; 4623 4624 // Precompute all of the configuration thresholds we will need. 4625 mConfigTickDistance = TICK_DISTANCE_MILLIMETERS * nominalRes; 4626 mConfigMinFlingVelocity = 4627 MIN_FLING_VELOCITY_TICKS_PER_SECOND * mConfigTickDistance; 4628 mConfigMaxFlingVelocity = 4629 MAX_FLING_VELOCITY_TICKS_PER_SECOND * mConfigTickDistance; 4630 4631 if (LOCAL_DEBUG) { 4632 Log.d(LOCAL_TAG, "Configured device " + mCurrentDeviceId 4633 + " (" + Integer.toHexString(mCurrentSource) + "): " 4634 + ", mConfigTickDistance=" + mConfigTickDistance 4635 + ", mConfigMinFlingVelocity=" + mConfigMinFlingVelocity 4636 + ", mConfigMaxFlingVelocity=" + mConfigMaxFlingVelocity); 4637 } 4638 } 4639 } 4640 } 4641 if (!mCurrentDeviceSupported) { 4642 return; 4643 } 4644 4645 // Handle the event. 4646 final int action = event.getActionMasked(); 4647 switch (action) { 4648 case MotionEvent.ACTION_DOWN: { 4649 boolean caughtFling = mFlinging; 4650 finishKeys(time); 4651 finishTracking(time); 4652 mActivePointerId = event.getPointerId(0); 4653 mVelocityTracker = VelocityTracker.obtain(); 4654 mVelocityTracker.addMovement(event); 4655 mStartX = event.getX(); 4656 mStartY = event.getY(); 4657 mLastX = mStartX; 4658 mLastY = mStartY; 4659 mAccumulatedX = 0; 4660 mAccumulatedY = 0; 4661 4662 // If we caught a fling, then pretend that the tap slop has already 4663 // been exceeded to suppress taps whose only purpose is to stop the fling. 4664 mConsumedMovement = caughtFling; 4665 break; 4666 } 4667 4668 case MotionEvent.ACTION_MOVE: 4669 case MotionEvent.ACTION_UP: { 4670 if (mActivePointerId < 0) { 4671 break; 4672 } 4673 final int index = event.findPointerIndex(mActivePointerId); 4674 if (index < 0) { 4675 finishKeys(time); 4676 finishTracking(time); 4677 break; 4678 } 4679 4680 mVelocityTracker.addMovement(event); 4681 final float x = event.getX(index); 4682 final float y = event.getY(index); 4683 mAccumulatedX += x - mLastX; 4684 mAccumulatedY += y - mLastY; 4685 mLastX = x; 4686 mLastY = y; 4687 4688 // Consume any accumulated movement so far. 4689 final int metaState = event.getMetaState(); 4690 consumeAccumulatedMovement(time, metaState); 4691 4692 // Detect taps and flings. 4693 if (action == MotionEvent.ACTION_UP) { 4694 if (mConsumedMovement && mPendingKeyCode != KeyEvent.KEYCODE_UNKNOWN) { 4695 // It might be a fling. 4696 mVelocityTracker.computeCurrentVelocity(1000, mConfigMaxFlingVelocity); 4697 final float vx = mVelocityTracker.getXVelocity(mActivePointerId); 4698 final float vy = mVelocityTracker.getYVelocity(mActivePointerId); 4699 if (!startFling(time, vx, vy)) { 4700 finishKeys(time); 4701 } 4702 } 4703 finishTracking(time); 4704 } 4705 break; 4706 } 4707 4708 case MotionEvent.ACTION_CANCEL: { 4709 finishKeys(time); 4710 finishTracking(time); 4711 break; 4712 } 4713 } 4714 } 4715 4716 public void cancel(MotionEvent event) { 4717 if (mCurrentDeviceId == event.getDeviceId() 4718 && mCurrentSource == event.getSource()) { 4719 final long time = event.getEventTime(); 4720 finishKeys(time); 4721 finishTracking(time); 4722 } 4723 } 4724 4725 private void finishKeys(long time) { 4726 cancelFling(); 4727 sendKeyUp(time); 4728 } 4729 4730 private void finishTracking(long time) { 4731 if (mActivePointerId >= 0) { 4732 mActivePointerId = -1; 4733 mVelocityTracker.recycle(); 4734 mVelocityTracker = null; 4735 } 4736 } 4737 4738 private void consumeAccumulatedMovement(long time, int metaState) { 4739 final float absX = Math.abs(mAccumulatedX); 4740 final float absY = Math.abs(mAccumulatedY); 4741 if (absX >= absY) { 4742 if (absX >= mConfigTickDistance) { 4743 mAccumulatedX = consumeAccumulatedMovement(time, metaState, mAccumulatedX, 4744 KeyEvent.KEYCODE_DPAD_LEFT, KeyEvent.KEYCODE_DPAD_RIGHT); 4745 mAccumulatedY = 0; 4746 mConsumedMovement = true; 4747 } 4748 } else { 4749 if (absY >= mConfigTickDistance) { 4750 mAccumulatedY = consumeAccumulatedMovement(time, metaState, mAccumulatedY, 4751 KeyEvent.KEYCODE_DPAD_UP, KeyEvent.KEYCODE_DPAD_DOWN); 4752 mAccumulatedX = 0; 4753 mConsumedMovement = true; 4754 } 4755 } 4756 } 4757 4758 private float consumeAccumulatedMovement(long time, int metaState, 4759 float accumulator, int negativeKeyCode, int positiveKeyCode) { 4760 while (accumulator <= -mConfigTickDistance) { 4761 sendKeyDownOrRepeat(time, negativeKeyCode, metaState); 4762 accumulator += mConfigTickDistance; 4763 } 4764 while (accumulator >= mConfigTickDistance) { 4765 sendKeyDownOrRepeat(time, positiveKeyCode, metaState); 4766 accumulator -= mConfigTickDistance; 4767 } 4768 return accumulator; 4769 } 4770 4771 private void sendKeyDownOrRepeat(long time, int keyCode, int metaState) { 4772 if (mPendingKeyCode != keyCode) { 4773 sendKeyUp(time); 4774 mPendingKeyDownTime = time; 4775 mPendingKeyCode = keyCode; 4776 mPendingKeyRepeatCount = 0; 4777 } else { 4778 mPendingKeyRepeatCount += 1; 4779 } 4780 mPendingKeyMetaState = metaState; 4781 4782 // Note: Normally we would pass FLAG_LONG_PRESS when the repeat count is 1 4783 // but it doesn't quite make sense when simulating the events in this way. 4784 if (LOCAL_DEBUG) { 4785 Log.d(LOCAL_TAG, "Sending key down: keyCode=" + mPendingKeyCode 4786 + ", repeatCount=" + mPendingKeyRepeatCount 4787 + ", metaState=" + Integer.toHexString(mPendingKeyMetaState)); 4788 } 4789 enqueueInputEvent(new KeyEvent(mPendingKeyDownTime, time, 4790 KeyEvent.ACTION_DOWN, mPendingKeyCode, mPendingKeyRepeatCount, 4791 mPendingKeyMetaState, mCurrentDeviceId, 4792 KeyEvent.FLAG_FALLBACK, mCurrentSource)); 4793 } 4794 4795 private void sendKeyUp(long time) { 4796 if (mPendingKeyCode != KeyEvent.KEYCODE_UNKNOWN) { 4797 if (LOCAL_DEBUG) { 4798 Log.d(LOCAL_TAG, "Sending key up: keyCode=" + mPendingKeyCode 4799 + ", metaState=" + Integer.toHexString(mPendingKeyMetaState)); 4800 } 4801 enqueueInputEvent(new KeyEvent(mPendingKeyDownTime, time, 4802 KeyEvent.ACTION_UP, mPendingKeyCode, 0, mPendingKeyMetaState, 4803 mCurrentDeviceId, 0, KeyEvent.FLAG_FALLBACK, 4804 mCurrentSource)); 4805 mPendingKeyCode = KeyEvent.KEYCODE_UNKNOWN; 4806 } 4807 } 4808 4809 private boolean startFling(long time, float vx, float vy) { 4810 if (LOCAL_DEBUG) { 4811 Log.d(LOCAL_TAG, "Considering fling: vx=" + vx + ", vy=" + vy 4812 + ", min=" + mConfigMinFlingVelocity); 4813 } 4814 4815 // Flings must be oriented in the same direction as the preceding movements. 4816 switch (mPendingKeyCode) { 4817 case KeyEvent.KEYCODE_DPAD_LEFT: 4818 if (-vx >= mConfigMinFlingVelocity 4819 && Math.abs(vy) < mConfigMinFlingVelocity) { 4820 mFlingVelocity = -vx; 4821 break; 4822 } 4823 return false; 4824 4825 case KeyEvent.KEYCODE_DPAD_RIGHT: 4826 if (vx >= mConfigMinFlingVelocity 4827 && Math.abs(vy) < mConfigMinFlingVelocity) { 4828 mFlingVelocity = vx; 4829 break; 4830 } 4831 return false; 4832 4833 case KeyEvent.KEYCODE_DPAD_UP: 4834 if (-vy >= mConfigMinFlingVelocity 4835 && Math.abs(vx) < mConfigMinFlingVelocity) { 4836 mFlingVelocity = -vy; 4837 break; 4838 } 4839 return false; 4840 4841 case KeyEvent.KEYCODE_DPAD_DOWN: 4842 if (vy >= mConfigMinFlingVelocity 4843 && Math.abs(vx) < mConfigMinFlingVelocity) { 4844 mFlingVelocity = vy; 4845 break; 4846 } 4847 return false; 4848 } 4849 4850 // Post the first fling event. 4851 mFlinging = postFling(time); 4852 return mFlinging; 4853 } 4854 4855 private boolean postFling(long time) { 4856 // The idea here is to estimate the time when the pointer would have 4857 // traveled one tick distance unit given the current fling velocity. 4858 // This effect creates continuity of motion. 4859 if (mFlingVelocity >= mConfigMinFlingVelocity) { 4860 long delay = (long)(mConfigTickDistance / mFlingVelocity * 1000); 4861 postAtTime(mFlingRunnable, time + delay); 4862 if (LOCAL_DEBUG) { 4863 Log.d(LOCAL_TAG, "Posted fling: velocity=" 4864 + mFlingVelocity + ", delay=" + delay 4865 + ", keyCode=" + mPendingKeyCode); 4866 } 4867 return true; 4868 } 4869 return false; 4870 } 4871 4872 private void cancelFling() { 4873 if (mFlinging) { 4874 removeCallbacks(mFlingRunnable); 4875 mFlinging = false; 4876 } 4877 } 4878 4879 private final Runnable mFlingRunnable = new Runnable() { 4880 @Override 4881 public void run() { 4882 final long time = SystemClock.uptimeMillis(); 4883 sendKeyDownOrRepeat(time, mPendingKeyCode, mPendingKeyMetaState); 4884 mFlingVelocity *= FLING_TICK_DECAY; 4885 if (!postFling(time)) { 4886 mFlinging = false; 4887 finishKeys(time); 4888 } 4889 } 4890 }; 4891 } 4892 4893 final class SyntheticKeyboardHandler { 4894 public void process(KeyEvent event) { 4895 if ((event.getFlags() & KeyEvent.FLAG_FALLBACK) != 0) { 4896 return; 4897 } 4898 4899 final KeyCharacterMap kcm = event.getKeyCharacterMap(); 4900 final int keyCode = event.getKeyCode(); 4901 final int metaState = event.getMetaState(); 4902 4903 // Check for fallback actions specified by the key character map. 4904 KeyCharacterMap.FallbackAction fallbackAction = 4905 kcm.getFallbackAction(keyCode, metaState); 4906 if (fallbackAction != null) { 4907 final int flags = event.getFlags() | KeyEvent.FLAG_FALLBACK; 4908 KeyEvent fallbackEvent = KeyEvent.obtain( 4909 event.getDownTime(), event.getEventTime(), 4910 event.getAction(), fallbackAction.keyCode, 4911 event.getRepeatCount(), fallbackAction.metaState, 4912 event.getDeviceId(), event.getScanCode(), 4913 flags, event.getSource(), null); 4914 fallbackAction.recycle(); 4915 enqueueInputEvent(fallbackEvent); 4916 } 4917 } 4918 } 4919 4920 /** 4921 * Returns true if the key is used for keyboard navigation. 4922 * @param keyEvent The key event. 4923 * @return True if the key is used for keyboard navigation. 4924 */ 4925 private static boolean isNavigationKey(KeyEvent keyEvent) { 4926 switch (keyEvent.getKeyCode()) { 4927 case KeyEvent.KEYCODE_DPAD_LEFT: 4928 case KeyEvent.KEYCODE_DPAD_RIGHT: 4929 case KeyEvent.KEYCODE_DPAD_UP: 4930 case KeyEvent.KEYCODE_DPAD_DOWN: 4931 case KeyEvent.KEYCODE_DPAD_CENTER: 4932 case KeyEvent.KEYCODE_PAGE_UP: 4933 case KeyEvent.KEYCODE_PAGE_DOWN: 4934 case KeyEvent.KEYCODE_MOVE_HOME: 4935 case KeyEvent.KEYCODE_MOVE_END: 4936 case KeyEvent.KEYCODE_TAB: 4937 case KeyEvent.KEYCODE_SPACE: 4938 case KeyEvent.KEYCODE_ENTER: 4939 return true; 4940 } 4941 return false; 4942 } 4943 4944 /** 4945 * Returns true if the key is used for typing. 4946 * @param keyEvent The key event. 4947 * @return True if the key is used for typing. 4948 */ 4949 private static boolean isTypingKey(KeyEvent keyEvent) { 4950 return keyEvent.getUnicodeChar() > 0; 4951 } 4952 4953 /** 4954 * See if the key event means we should leave touch mode (and leave touch mode if so). 4955 * @param event The key event. 4956 * @return Whether this key event should be consumed (meaning the act of 4957 * leaving touch mode alone is considered the event). 4958 */ 4959 private boolean checkForLeavingTouchModeAndConsume(KeyEvent event) { 4960 // Only relevant in touch mode. 4961 if (!mAttachInfo.mInTouchMode) { 4962 return false; 4963 } 4964 4965 // Only consider leaving touch mode on DOWN or MULTIPLE actions, never on UP. 4966 final int action = event.getAction(); 4967 if (action != KeyEvent.ACTION_DOWN && action != KeyEvent.ACTION_MULTIPLE) { 4968 return false; 4969 } 4970 4971 // Don't leave touch mode if the IME told us not to. 4972 if ((event.getFlags() & KeyEvent.FLAG_KEEP_TOUCH_MODE) != 0) { 4973 return false; 4974 } 4975 4976 // If the key can be used for keyboard navigation then leave touch mode 4977 // and select a focused view if needed (in ensureTouchMode). 4978 // When a new focused view is selected, we consume the navigation key because 4979 // navigation doesn't make much sense unless a view already has focus so 4980 // the key's purpose is to set focus. 4981 if (isNavigationKey(event)) { 4982 return ensureTouchMode(false); 4983 } 4984 4985 // If the key can be used for typing then leave touch mode 4986 // and select a focused view if needed (in ensureTouchMode). 4987 // Always allow the view to process the typing key. 4988 if (isTypingKey(event)) { 4989 ensureTouchMode(false); 4990 return false; 4991 } 4992 4993 return false; 4994 } 4995 4996 /* drag/drop */ 4997 void setLocalDragState(Object obj) { 4998 mLocalDragState = obj; 4999 } 5000 5001 private void handleDragEvent(DragEvent event) { 5002 // From the root, only drag start/end/location are dispatched. entered/exited 5003 // are determined and dispatched by the viewgroup hierarchy, who then report 5004 // that back here for ultimate reporting back to the framework. 5005 if (mView != null && mAdded) { 5006 final int what = event.mAction; 5007 5008 if (what == DragEvent.ACTION_DRAG_EXITED) { 5009 // A direct EXITED event means that the window manager knows we've just crossed 5010 // a window boundary, so the current drag target within this one must have 5011 // just been exited. Send it the usual notifications and then we're done 5012 // for now. 5013 mView.dispatchDragEvent(event); 5014 } else { 5015 // Cache the drag description when the operation starts, then fill it in 5016 // on subsequent calls as a convenience 5017 if (what == DragEvent.ACTION_DRAG_STARTED) { 5018 mCurrentDragView = null; // Start the current-recipient tracking 5019 mDragDescription = event.mClipDescription; 5020 } else { 5021 event.mClipDescription = mDragDescription; 5022 } 5023 5024 // For events with a [screen] location, translate into window coordinates 5025 if ((what == DragEvent.ACTION_DRAG_LOCATION) || (what == DragEvent.ACTION_DROP)) { 5026 mDragPoint.set(event.mX, event.mY); 5027 if (mTranslator != null) { 5028 mTranslator.translatePointInScreenToAppWindow(mDragPoint); 5029 } 5030 5031 if (mCurScrollY != 0) { 5032 mDragPoint.offset(0, mCurScrollY); 5033 } 5034 5035 event.mX = mDragPoint.x; 5036 event.mY = mDragPoint.y; 5037 } 5038 5039 // Remember who the current drag target is pre-dispatch 5040 final View prevDragView = mCurrentDragView; 5041 5042 // Now dispatch the drag/drop event 5043 boolean result = mView.dispatchDragEvent(event); 5044 5045 // If we changed apparent drag target, tell the OS about it 5046 if (prevDragView != mCurrentDragView) { 5047 try { 5048 if (prevDragView != null) { 5049 mWindowSession.dragRecipientExited(mWindow); 5050 } 5051 if (mCurrentDragView != null) { 5052 mWindowSession.dragRecipientEntered(mWindow); 5053 } 5054 } catch (RemoteException e) { 5055 Slog.e(TAG, "Unable to note drag target change"); 5056 } 5057 } 5058 5059 // Report the drop result when we're done 5060 if (what == DragEvent.ACTION_DROP) { 5061 mDragDescription = null; 5062 try { 5063 Log.i(TAG, "Reporting drop result: " + result); 5064 mWindowSession.reportDropResult(mWindow, result); 5065 } catch (RemoteException e) { 5066 Log.e(TAG, "Unable to report drop result"); 5067 } 5068 } 5069 5070 // When the drag operation ends, release any local state object 5071 // that may have been in use 5072 if (what == DragEvent.ACTION_DRAG_ENDED) { 5073 setLocalDragState(null); 5074 } 5075 } 5076 } 5077 event.recycle(); 5078 } 5079 5080 public void handleDispatchSystemUiVisibilityChanged(SystemUiVisibilityInfo args) { 5081 if (mSeq != args.seq) { 5082 // The sequence has changed, so we need to update our value and make 5083 // sure to do a traversal afterward so the window manager is given our 5084 // most recent data. 5085 mSeq = args.seq; 5086 mAttachInfo.mForceReportNewAttributes = true; 5087 scheduleTraversals(); 5088 } 5089 if (mView == null) return; 5090 if (args.localChanges != 0) { 5091 mView.updateLocalSystemUiVisibility(args.localValue, args.localChanges); 5092 } 5093 if (mAttachInfo != null) { 5094 int visibility = args.globalVisibility&View.SYSTEM_UI_CLEARABLE_FLAGS; 5095 if (visibility != mAttachInfo.mGlobalSystemUiVisibility) { 5096 mAttachInfo.mGlobalSystemUiVisibility = visibility; 5097 mView.dispatchSystemUiVisibilityChanged(visibility); 5098 } 5099 } 5100 } 5101 5102 public void handleDispatchDoneAnimating() { 5103 if (mWindowsAnimating) { 5104 mWindowsAnimating = false; 5105 if (!mDirty.isEmpty() || mIsAnimating || mFullRedrawNeeded) { 5106 scheduleTraversals(); 5107 } 5108 } 5109 } 5110 5111 public void getLastTouchPoint(Point outLocation) { 5112 outLocation.x = (int) mLastTouchPoint.x; 5113 outLocation.y = (int) mLastTouchPoint.y; 5114 } 5115 5116 public void setDragFocus(View newDragTarget) { 5117 if (mCurrentDragView != newDragTarget) { 5118 mCurrentDragView = newDragTarget; 5119 } 5120 } 5121 5122 private AudioManager getAudioManager() { 5123 if (mView == null) { 5124 throw new IllegalStateException("getAudioManager called when there is no mView"); 5125 } 5126 if (mAudioManager == null) { 5127 mAudioManager = (AudioManager) mView.getContext().getSystemService(Context.AUDIO_SERVICE); 5128 } 5129 return mAudioManager; 5130 } 5131 5132 public AccessibilityInteractionController getAccessibilityInteractionController() { 5133 if (mView == null) { 5134 throw new IllegalStateException("getAccessibilityInteractionController" 5135 + " called when there is no mView"); 5136 } 5137 if (mAccessibilityInteractionController == null) { 5138 mAccessibilityInteractionController = new AccessibilityInteractionController(this); 5139 } 5140 return mAccessibilityInteractionController; 5141 } 5142 5143 private int relayoutWindow(WindowManager.LayoutParams params, int viewVisibility, 5144 boolean insetsPending) throws RemoteException { 5145 5146 float appScale = mAttachInfo.mApplicationScale; 5147 boolean restore = false; 5148 if (params != null && mTranslator != null) { 5149 restore = true; 5150 params.backup(); 5151 mTranslator.translateWindowLayout(params); 5152 } 5153 if (params != null) { 5154 if (DBG) Log.d(TAG, "WindowLayout in layoutWindow:" + params); 5155 } 5156 mPendingConfiguration.seq = 0; 5157 //Log.d(TAG, ">>>>>> CALLING relayout"); 5158 if (params != null && mOrigWindowType != params.type) { 5159 // For compatibility with old apps, don't crash here. 5160 if (mTargetSdkVersion < android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH) { 5161 Slog.w(TAG, "Window type can not be changed after " 5162 + "the window is added; ignoring change of " + mView); 5163 params.type = mOrigWindowType; 5164 } 5165 } 5166 int relayoutResult = mWindowSession.relayout( 5167 mWindow, mSeq, params, 5168 (int) (mView.getMeasuredWidth() * appScale + 0.5f), 5169 (int) (mView.getMeasuredHeight() * appScale + 0.5f), 5170 viewVisibility, insetsPending ? WindowManagerGlobal.RELAYOUT_INSETS_PENDING : 0, 5171 mWinFrame, mPendingOverscanInsets, mPendingContentInsets, mPendingVisibleInsets, 5172 mPendingConfiguration, mSurface); 5173 //Log.d(TAG, "<<<<<< BACK FROM relayout"); 5174 if (restore) { 5175 params.restore(); 5176 } 5177 5178 if (mTranslator != null) { 5179 mTranslator.translateRectInScreenToAppWinFrame(mWinFrame); 5180 mTranslator.translateRectInScreenToAppWindow(mPendingOverscanInsets); 5181 mTranslator.translateRectInScreenToAppWindow(mPendingContentInsets); 5182 mTranslator.translateRectInScreenToAppWindow(mPendingVisibleInsets); 5183 } 5184 return relayoutResult; 5185 } 5186 5187 /** 5188 * {@inheritDoc} 5189 */ 5190 @Override 5191 public void playSoundEffect(int effectId) { 5192 checkThread(); 5193 5194 if (mMediaDisabled) { 5195 return; 5196 } 5197 5198 try { 5199 final AudioManager audioManager = getAudioManager(); 5200 5201 switch (effectId) { 5202 case SoundEffectConstants.CLICK: 5203 audioManager.playSoundEffect(AudioManager.FX_KEY_CLICK); 5204 return; 5205 case SoundEffectConstants.NAVIGATION_DOWN: 5206 audioManager.playSoundEffect(AudioManager.FX_FOCUS_NAVIGATION_DOWN); 5207 return; 5208 case SoundEffectConstants.NAVIGATION_LEFT: 5209 audioManager.playSoundEffect(AudioManager.FX_FOCUS_NAVIGATION_LEFT); 5210 return; 5211 case SoundEffectConstants.NAVIGATION_RIGHT: 5212 audioManager.playSoundEffect(AudioManager.FX_FOCUS_NAVIGATION_RIGHT); 5213 return; 5214 case SoundEffectConstants.NAVIGATION_UP: 5215 audioManager.playSoundEffect(AudioManager.FX_FOCUS_NAVIGATION_UP); 5216 return; 5217 default: 5218 throw new IllegalArgumentException("unknown effect id " + effectId + 5219 " not defined in " + SoundEffectConstants.class.getCanonicalName()); 5220 } 5221 } catch (IllegalStateException e) { 5222 // Exception thrown by getAudioManager() when mView is null 5223 Log.e(TAG, "FATAL EXCEPTION when attempting to play sound effect: " + e); 5224 e.printStackTrace(); 5225 } 5226 } 5227 5228 /** 5229 * {@inheritDoc} 5230 */ 5231 @Override 5232 public boolean performHapticFeedback(int effectId, boolean always) { 5233 try { 5234 return mWindowSession.performHapticFeedback(mWindow, effectId, always); 5235 } catch (RemoteException e) { 5236 return false; 5237 } 5238 } 5239 5240 /** 5241 * {@inheritDoc} 5242 */ 5243 @Override 5244 public View focusSearch(View focused, int direction) { 5245 checkThread(); 5246 if (!(mView instanceof ViewGroup)) { 5247 return null; 5248 } 5249 return FocusFinder.getInstance().findNextFocus((ViewGroup) mView, focused, direction); 5250 } 5251 5252 public void debug() { 5253 mView.debug(); 5254 } 5255 5256 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 5257 String innerPrefix = prefix + " "; 5258 writer.print(prefix); writer.println("ViewRoot:"); 5259 writer.print(innerPrefix); writer.print("mAdded="); writer.print(mAdded); 5260 writer.print(" mRemoved="); writer.println(mRemoved); 5261 writer.print(innerPrefix); writer.print("mConsumeBatchedInputScheduled="); 5262 writer.println(mConsumeBatchedInputScheduled); 5263 writer.print(innerPrefix); writer.print("mPendingInputEventCount="); 5264 writer.println(mPendingInputEventCount); 5265 writer.print(innerPrefix); writer.print("mProcessInputEventsScheduled="); 5266 writer.println(mProcessInputEventsScheduled); 5267 writer.print(innerPrefix); writer.print("mTraversalScheduled="); 5268 writer.print(mTraversalScheduled); 5269 if (mTraversalScheduled) { 5270 writer.print(" (barrier="); writer.print(mTraversalBarrier); writer.println(")"); 5271 } else { 5272 writer.println(); 5273 } 5274 mFirstInputStage.dump(innerPrefix, writer); 5275 5276 mChoreographer.dump(prefix, writer); 5277 5278 writer.print(prefix); writer.println("View Hierarchy:"); 5279 dumpViewHierarchy(innerPrefix, writer, mView); 5280 } 5281 5282 private void dumpViewHierarchy(String prefix, PrintWriter writer, View view) { 5283 writer.print(prefix); 5284 if (view == null) { 5285 writer.println("null"); 5286 return; 5287 } 5288 writer.println(view.toString()); 5289 if (!(view instanceof ViewGroup)) { 5290 return; 5291 } 5292 ViewGroup grp = (ViewGroup)view; 5293 final int N = grp.getChildCount(); 5294 if (N <= 0) { 5295 return; 5296 } 5297 prefix = prefix + " "; 5298 for (int i=0; i<N; i++) { 5299 dumpViewHierarchy(prefix, writer, grp.getChildAt(i)); 5300 } 5301 } 5302 5303 public void dumpGfxInfo(int[] info) { 5304 info[0] = info[1] = 0; 5305 if (mView != null) { 5306 getGfxInfo(mView, info); 5307 } 5308 } 5309 5310 private static void getGfxInfo(View view, int[] info) { 5311 RenderNode renderNode = view.mRenderNode; 5312 info[0]++; 5313 if (renderNode != null) { 5314 info[1] += 0; /* TODO: Memory used by RenderNodes (properties + DisplayLists) */ 5315 } 5316 5317 if (view instanceof ViewGroup) { 5318 ViewGroup group = (ViewGroup) view; 5319 5320 int count = group.getChildCount(); 5321 for (int i = 0; i < count; i++) { 5322 getGfxInfo(group.getChildAt(i), info); 5323 } 5324 } 5325 } 5326 5327 /** 5328 * @param immediate True, do now if not in traversal. False, put on queue and do later. 5329 * @return True, request has been queued. False, request has been completed. 5330 */ 5331 boolean die(boolean immediate) { 5332 // Make sure we do execute immediately if we are in the middle of a traversal or the damage 5333 // done by dispatchDetachedFromWindow will cause havoc on return. 5334 if (immediate && !mIsInTraversal) { 5335 doDie(); 5336 return false; 5337 } 5338 5339 if (!mIsDrawing) { 5340 destroyHardwareRenderer(); 5341 } else { 5342 Log.e(TAG, "Attempting to destroy the window while drawing!\n" + 5343 " window=" + this + ", title=" + mWindowAttributes.getTitle()); 5344 } 5345 mHandler.sendEmptyMessage(MSG_DIE); 5346 return true; 5347 } 5348 5349 void doDie() { 5350 checkThread(); 5351 if (LOCAL_LOGV) Log.v(TAG, "DIE in " + this + " of " + mSurface); 5352 synchronized (this) { 5353 if (mRemoved) { 5354 return; 5355 } 5356 mRemoved = true; 5357 if (mAdded) { 5358 dispatchDetachedFromWindow(); 5359 } 5360 5361 if (mAdded && !mFirst) { 5362 destroyHardwareRenderer(); 5363 5364 if (mView != null) { 5365 int viewVisibility = mView.getVisibility(); 5366 boolean viewVisibilityChanged = mViewVisibility != viewVisibility; 5367 if (mWindowAttributesChanged || viewVisibilityChanged) { 5368 // If layout params have been changed, first give them 5369 // to the window manager to make sure it has the correct 5370 // animation info. 5371 try { 5372 if ((relayoutWindow(mWindowAttributes, viewVisibility, false) 5373 & WindowManagerGlobal.RELAYOUT_RES_FIRST_TIME) != 0) { 5374 mWindowSession.finishDrawing(mWindow); 5375 } 5376 } catch (RemoteException e) { 5377 } 5378 } 5379 5380 mSurface.release(); 5381 } 5382 } 5383 5384 mAdded = false; 5385 } 5386 WindowManagerGlobal.getInstance().doRemoveView(this); 5387 } 5388 5389 public void requestUpdateConfiguration(Configuration config) { 5390 Message msg = mHandler.obtainMessage(MSG_UPDATE_CONFIGURATION, config); 5391 mHandler.sendMessage(msg); 5392 } 5393 5394 public void loadSystemProperties() { 5395 mHandler.post(new Runnable() { 5396 @Override 5397 public void run() { 5398 // Profiling 5399 mProfileRendering = SystemProperties.getBoolean(PROPERTY_PROFILE_RENDERING, false); 5400 profileRendering(mAttachInfo.mHasWindowFocus); 5401 5402 // Media (used by sound effects) 5403 mMediaDisabled = SystemProperties.getBoolean(PROPERTY_MEDIA_DISABLED, false); 5404 5405 // Hardware rendering 5406 if (mAttachInfo.mHardwareRenderer != null) { 5407 if (mAttachInfo.mHardwareRenderer.loadSystemProperties()) { 5408 invalidate(); 5409 } 5410 } 5411 5412 // Layout debugging 5413 boolean layout = SystemProperties.getBoolean(View.DEBUG_LAYOUT_PROPERTY, false); 5414 if (layout != mAttachInfo.mDebugLayout) { 5415 mAttachInfo.mDebugLayout = layout; 5416 if (!mHandler.hasMessages(MSG_INVALIDATE_WORLD)) { 5417 mHandler.sendEmptyMessageDelayed(MSG_INVALIDATE_WORLD, 200); 5418 } 5419 } 5420 } 5421 }); 5422 } 5423 5424 private void destroyHardwareRenderer() { 5425 AttachInfo attachInfo = mAttachInfo; 5426 HardwareRenderer hardwareRenderer = attachInfo.mHardwareRenderer; 5427 5428 if (hardwareRenderer != null) { 5429 if (mView != null) { 5430 hardwareRenderer.destroyHardwareResources(mView); 5431 } 5432 hardwareRenderer.destroy(true); 5433 hardwareRenderer.setRequested(false); 5434 5435 attachInfo.mHardwareRenderer = null; 5436 attachInfo.mHardwareAccelerated = false; 5437 } 5438 } 5439 5440 public void dispatchFinishInputConnection(InputConnection connection) { 5441 Message msg = mHandler.obtainMessage(MSG_FINISH_INPUT_CONNECTION, connection); 5442 mHandler.sendMessage(msg); 5443 } 5444 5445 public void dispatchResized(Rect frame, Rect overscanInsets, Rect contentInsets, 5446 Rect visibleInsets, boolean reportDraw, Configuration newConfig) { 5447 if (DEBUG_LAYOUT) Log.v(TAG, "Resizing " + this + ": frame=" + frame.toShortString() 5448 + " contentInsets=" + contentInsets.toShortString() 5449 + " visibleInsets=" + visibleInsets.toShortString() 5450 + " reportDraw=" + reportDraw); 5451 Message msg = mHandler.obtainMessage(reportDraw ? MSG_RESIZED_REPORT : MSG_RESIZED); 5452 if (mTranslator != null) { 5453 mTranslator.translateRectInScreenToAppWindow(frame); 5454 mTranslator.translateRectInScreenToAppWindow(overscanInsets); 5455 mTranslator.translateRectInScreenToAppWindow(contentInsets); 5456 mTranslator.translateRectInScreenToAppWindow(visibleInsets); 5457 } 5458 SomeArgs args = SomeArgs.obtain(); 5459 final boolean sameProcessCall = (Binder.getCallingPid() == android.os.Process.myPid()); 5460 args.arg1 = sameProcessCall ? new Rect(frame) : frame; 5461 args.arg2 = sameProcessCall ? new Rect(contentInsets) : contentInsets; 5462 args.arg3 = sameProcessCall ? new Rect(visibleInsets) : visibleInsets; 5463 args.arg4 = sameProcessCall && newConfig != null ? new Configuration(newConfig) : newConfig; 5464 args.arg5 = sameProcessCall ? new Rect(overscanInsets) : overscanInsets; 5465 msg.obj = args; 5466 mHandler.sendMessage(msg); 5467 } 5468 5469 public void dispatchMoved(int newX, int newY) { 5470 if (DEBUG_LAYOUT) Log.v(TAG, "Window moved " + this + ": newX=" + newX + " newY=" + newY); 5471 if (mTranslator != null) { 5472 PointF point = new PointF(newX, newY); 5473 mTranslator.translatePointInScreenToAppWindow(point); 5474 newX = (int) (point.x + 0.5); 5475 newY = (int) (point.y + 0.5); 5476 } 5477 Message msg = mHandler.obtainMessage(MSG_WINDOW_MOVED, newX, newY); 5478 mHandler.sendMessage(msg); 5479 } 5480 5481 /** 5482 * Represents a pending input event that is waiting in a queue. 5483 * 5484 * Input events are processed in serial order by the timestamp specified by 5485 * {@link InputEvent#getEventTimeNano()}. In general, the input dispatcher delivers 5486 * one input event to the application at a time and waits for the application 5487 * to finish handling it before delivering the next one. 5488 * 5489 * However, because the application or IME can synthesize and inject multiple 5490 * key events at a time without going through the input dispatcher, we end up 5491 * needing a queue on the application's side. 5492 */ 5493 private static final class QueuedInputEvent { 5494 public static final int FLAG_DELIVER_POST_IME = 1 << 0; 5495 public static final int FLAG_DEFERRED = 1 << 1; 5496 public static final int FLAG_FINISHED = 1 << 2; 5497 public static final int FLAG_FINISHED_HANDLED = 1 << 3; 5498 public static final int FLAG_RESYNTHESIZED = 1 << 4; 5499 public static final int FLAG_UNHANDLED = 1 << 5; 5500 5501 public QueuedInputEvent mNext; 5502 5503 public InputEvent mEvent; 5504 public InputEventReceiver mReceiver; 5505 public int mFlags; 5506 5507 public boolean shouldSkipIme() { 5508 if ((mFlags & FLAG_DELIVER_POST_IME) != 0) { 5509 return true; 5510 } 5511 return mEvent instanceof MotionEvent 5512 && mEvent.isFromSource(InputDevice.SOURCE_CLASS_POINTER); 5513 } 5514 5515 public boolean shouldSendToSynthesizer() { 5516 if ((mFlags & FLAG_UNHANDLED) != 0) { 5517 return true; 5518 } 5519 5520 return false; 5521 } 5522 5523 @Override 5524 public String toString() { 5525 StringBuilder sb = new StringBuilder("QueuedInputEvent{flags="); 5526 boolean hasPrevious = false; 5527 hasPrevious = flagToString("DELIVER_POST_IME", FLAG_DELIVER_POST_IME, hasPrevious, sb); 5528 hasPrevious = flagToString("DEFERRED", FLAG_DEFERRED, hasPrevious, sb); 5529 hasPrevious = flagToString("FINISHED", FLAG_FINISHED, hasPrevious, sb); 5530 hasPrevious = flagToString("FINISHED_HANDLED", FLAG_FINISHED_HANDLED, hasPrevious, sb); 5531 hasPrevious = flagToString("RESYNTHESIZED", FLAG_RESYNTHESIZED, hasPrevious, sb); 5532 hasPrevious = flagToString("UNHANDLED", FLAG_UNHANDLED, hasPrevious, sb); 5533 if (!hasPrevious) { 5534 sb.append("0"); 5535 } 5536 sb.append(", hasNextQueuedEvent=" + (mEvent != null ? "true" : "false")); 5537 sb.append(", hasInputEventReceiver=" + (mReceiver != null ? "true" : "false")); 5538 sb.append(", mEvent=" + mEvent + "}"); 5539 return sb.toString(); 5540 } 5541 5542 private boolean flagToString(String name, int flag, 5543 boolean hasPrevious, StringBuilder sb) { 5544 if ((mFlags & flag) != 0) { 5545 if (hasPrevious) { 5546 sb.append("|"); 5547 } 5548 sb.append(name); 5549 return true; 5550 } 5551 return hasPrevious; 5552 } 5553 } 5554 5555 private QueuedInputEvent obtainQueuedInputEvent(InputEvent event, 5556 InputEventReceiver receiver, int flags) { 5557 QueuedInputEvent q = mQueuedInputEventPool; 5558 if (q != null) { 5559 mQueuedInputEventPoolSize -= 1; 5560 mQueuedInputEventPool = q.mNext; 5561 q.mNext = null; 5562 } else { 5563 q = new QueuedInputEvent(); 5564 } 5565 5566 q.mEvent = event; 5567 q.mReceiver = receiver; 5568 q.mFlags = flags; 5569 return q; 5570 } 5571 5572 private void recycleQueuedInputEvent(QueuedInputEvent q) { 5573 q.mEvent = null; 5574 q.mReceiver = null; 5575 5576 if (mQueuedInputEventPoolSize < MAX_QUEUED_INPUT_EVENT_POOL_SIZE) { 5577 mQueuedInputEventPoolSize += 1; 5578 q.mNext = mQueuedInputEventPool; 5579 mQueuedInputEventPool = q; 5580 } 5581 } 5582 5583 void enqueueInputEvent(InputEvent event) { 5584 enqueueInputEvent(event, null, 0, false); 5585 } 5586 5587 void enqueueInputEvent(InputEvent event, 5588 InputEventReceiver receiver, int flags, boolean processImmediately) { 5589 QueuedInputEvent q = obtainQueuedInputEvent(event, receiver, flags); 5590 5591 // Always enqueue the input event in order, regardless of its time stamp. 5592 // We do this because the application or the IME may inject key events 5593 // in response to touch events and we want to ensure that the injected keys 5594 // are processed in the order they were received and we cannot trust that 5595 // the time stamp of injected events are monotonic. 5596 QueuedInputEvent last = mPendingInputEventTail; 5597 if (last == null) { 5598 mPendingInputEventHead = q; 5599 mPendingInputEventTail = q; 5600 } else { 5601 last.mNext = q; 5602 mPendingInputEventTail = q; 5603 } 5604 mPendingInputEventCount += 1; 5605 Trace.traceCounter(Trace.TRACE_TAG_INPUT, mPendingInputEventQueueLengthCounterName, 5606 mPendingInputEventCount); 5607 5608 if (processImmediately) { 5609 doProcessInputEvents(); 5610 } else { 5611 scheduleProcessInputEvents(); 5612 } 5613 } 5614 5615 private void scheduleProcessInputEvents() { 5616 if (!mProcessInputEventsScheduled) { 5617 mProcessInputEventsScheduled = true; 5618 Message msg = mHandler.obtainMessage(MSG_PROCESS_INPUT_EVENTS); 5619 msg.setAsynchronous(true); 5620 mHandler.sendMessage(msg); 5621 } 5622 } 5623 5624 void doProcessInputEvents() { 5625 // Deliver all pending input events in the queue. 5626 while (mPendingInputEventHead != null) { 5627 QueuedInputEvent q = mPendingInputEventHead; 5628 mPendingInputEventHead = q.mNext; 5629 if (mPendingInputEventHead == null) { 5630 mPendingInputEventTail = null; 5631 } 5632 q.mNext = null; 5633 5634 mPendingInputEventCount -= 1; 5635 Trace.traceCounter(Trace.TRACE_TAG_INPUT, mPendingInputEventQueueLengthCounterName, 5636 mPendingInputEventCount); 5637 5638 deliverInputEvent(q); 5639 } 5640 5641 // We are done processing all input events that we can process right now 5642 // so we can clear the pending flag immediately. 5643 if (mProcessInputEventsScheduled) { 5644 mProcessInputEventsScheduled = false; 5645 mHandler.removeMessages(MSG_PROCESS_INPUT_EVENTS); 5646 } 5647 } 5648 5649 private void deliverInputEvent(QueuedInputEvent q) { 5650 Trace.asyncTraceBegin(Trace.TRACE_TAG_VIEW, "deliverInputEvent", 5651 q.mEvent.getSequenceNumber()); 5652 if (mInputEventConsistencyVerifier != null) { 5653 mInputEventConsistencyVerifier.onInputEvent(q.mEvent, 0); 5654 } 5655 5656 InputStage stage; 5657 if (q.shouldSendToSynthesizer()) { 5658 stage = mSyntheticInputStage; 5659 } else { 5660 stage = q.shouldSkipIme() ? mFirstPostImeInputStage : mFirstInputStage; 5661 } 5662 5663 if (stage != null) { 5664 stage.deliver(q); 5665 } else { 5666 finishInputEvent(q); 5667 } 5668 } 5669 5670 private void finishInputEvent(QueuedInputEvent q) { 5671 Trace.asyncTraceEnd(Trace.TRACE_TAG_VIEW, "deliverInputEvent", 5672 q.mEvent.getSequenceNumber()); 5673 if (q.mReceiver != null) { 5674 boolean handled = (q.mFlags & QueuedInputEvent.FLAG_FINISHED_HANDLED) != 0; 5675 q.mReceiver.finishInputEvent(q.mEvent, handled); 5676 } else { 5677 q.mEvent.recycleIfNeededAfterDispatch(); 5678 } 5679 5680 recycleQueuedInputEvent(q); 5681 } 5682 5683 static boolean isTerminalInputEvent(InputEvent event) { 5684 if (event instanceof KeyEvent) { 5685 final KeyEvent keyEvent = (KeyEvent)event; 5686 return keyEvent.getAction() == KeyEvent.ACTION_UP; 5687 } else { 5688 final MotionEvent motionEvent = (MotionEvent)event; 5689 final int action = motionEvent.getAction(); 5690 return action == MotionEvent.ACTION_UP 5691 || action == MotionEvent.ACTION_CANCEL 5692 || action == MotionEvent.ACTION_HOVER_EXIT; 5693 } 5694 } 5695 5696 void scheduleConsumeBatchedInput() { 5697 if (!mConsumeBatchedInputScheduled) { 5698 mConsumeBatchedInputScheduled = true; 5699 mChoreographer.postCallback(Choreographer.CALLBACK_INPUT, 5700 mConsumedBatchedInputRunnable, null); 5701 } 5702 } 5703 5704 void unscheduleConsumeBatchedInput() { 5705 if (mConsumeBatchedInputScheduled) { 5706 mConsumeBatchedInputScheduled = false; 5707 mChoreographer.removeCallbacks(Choreographer.CALLBACK_INPUT, 5708 mConsumedBatchedInputRunnable, null); 5709 } 5710 } 5711 5712 void doConsumeBatchedInput(long frameTimeNanos) { 5713 if (mConsumeBatchedInputScheduled) { 5714 mConsumeBatchedInputScheduled = false; 5715 if (mInputEventReceiver != null) { 5716 if (mInputEventReceiver.consumeBatchedInputEvents(frameTimeNanos)) { 5717 // If we consumed a batch here, we want to go ahead and schedule the 5718 // consumption of batched input events on the next frame. Otherwise, we would 5719 // wait until we have more input events pending and might get starved by other 5720 // things occurring in the process. 5721 scheduleConsumeBatchedInput(); 5722 } 5723 } 5724 doProcessInputEvents(); 5725 } 5726 } 5727 5728 final class TraversalRunnable implements Runnable { 5729 @Override 5730 public void run() { 5731 doTraversal(); 5732 } 5733 } 5734 final TraversalRunnable mTraversalRunnable = new TraversalRunnable(); 5735 5736 final class WindowInputEventReceiver extends InputEventReceiver { 5737 public WindowInputEventReceiver(InputChannel inputChannel, Looper looper) { 5738 super(inputChannel, looper); 5739 } 5740 5741 @Override 5742 public void onInputEvent(InputEvent event) { 5743 enqueueInputEvent(event, this, 0, true); 5744 } 5745 5746 @Override 5747 public void onBatchedInputEventPending() { 5748 scheduleConsumeBatchedInput(); 5749 } 5750 5751 @Override 5752 public void dispose() { 5753 unscheduleConsumeBatchedInput(); 5754 super.dispose(); 5755 } 5756 } 5757 WindowInputEventReceiver mInputEventReceiver; 5758 5759 final class ConsumeBatchedInputRunnable implements Runnable { 5760 @Override 5761 public void run() { 5762 doConsumeBatchedInput(mChoreographer.getFrameTimeNanos()); 5763 } 5764 } 5765 final ConsumeBatchedInputRunnable mConsumedBatchedInputRunnable = 5766 new ConsumeBatchedInputRunnable(); 5767 boolean mConsumeBatchedInputScheduled; 5768 5769 final class InvalidateOnAnimationRunnable implements Runnable { 5770 private boolean mPosted; 5771 private final ArrayList<View> mViews = new ArrayList<View>(); 5772 private final ArrayList<AttachInfo.InvalidateInfo> mViewRects = 5773 new ArrayList<AttachInfo.InvalidateInfo>(); 5774 private View[] mTempViews; 5775 private AttachInfo.InvalidateInfo[] mTempViewRects; 5776 5777 public void addView(View view) { 5778 synchronized (this) { 5779 mViews.add(view); 5780 postIfNeededLocked(); 5781 } 5782 } 5783 5784 public void addViewRect(AttachInfo.InvalidateInfo info) { 5785 synchronized (this) { 5786 mViewRects.add(info); 5787 postIfNeededLocked(); 5788 } 5789 } 5790 5791 public void removeView(View view) { 5792 synchronized (this) { 5793 mViews.remove(view); 5794 5795 for (int i = mViewRects.size(); i-- > 0; ) { 5796 AttachInfo.InvalidateInfo info = mViewRects.get(i); 5797 if (info.target == view) { 5798 mViewRects.remove(i); 5799 info.recycle(); 5800 } 5801 } 5802 5803 if (mPosted && mViews.isEmpty() && mViewRects.isEmpty()) { 5804 mChoreographer.removeCallbacks(Choreographer.CALLBACK_ANIMATION, this, null); 5805 mPosted = false; 5806 } 5807 } 5808 } 5809 5810 @Override 5811 public void run() { 5812 final int viewCount; 5813 final int viewRectCount; 5814 synchronized (this) { 5815 mPosted = false; 5816 5817 viewCount = mViews.size(); 5818 if (viewCount != 0) { 5819 mTempViews = mViews.toArray(mTempViews != null 5820 ? mTempViews : new View[viewCount]); 5821 mViews.clear(); 5822 } 5823 5824 viewRectCount = mViewRects.size(); 5825 if (viewRectCount != 0) { 5826 mTempViewRects = mViewRects.toArray(mTempViewRects != null 5827 ? mTempViewRects : new AttachInfo.InvalidateInfo[viewRectCount]); 5828 mViewRects.clear(); 5829 } 5830 } 5831 5832 for (int i = 0; i < viewCount; i++) { 5833 mTempViews[i].invalidate(); 5834 mTempViews[i] = null; 5835 } 5836 5837 for (int i = 0; i < viewRectCount; i++) { 5838 final View.AttachInfo.InvalidateInfo info = mTempViewRects[i]; 5839 info.target.invalidate(info.left, info.top, info.right, info.bottom); 5840 info.recycle(); 5841 } 5842 } 5843 5844 private void postIfNeededLocked() { 5845 if (!mPosted) { 5846 mChoreographer.postCallback(Choreographer.CALLBACK_ANIMATION, this, null); 5847 mPosted = true; 5848 } 5849 } 5850 } 5851 final InvalidateOnAnimationRunnable mInvalidateOnAnimationRunnable = 5852 new InvalidateOnAnimationRunnable(); 5853 5854 public void dispatchInvalidateDelayed(View view, long delayMilliseconds) { 5855 Message msg = mHandler.obtainMessage(MSG_INVALIDATE, view); 5856 mHandler.sendMessageDelayed(msg, delayMilliseconds); 5857 } 5858 5859 public void dispatchInvalidateRectDelayed(AttachInfo.InvalidateInfo info, 5860 long delayMilliseconds) { 5861 final Message msg = mHandler.obtainMessage(MSG_INVALIDATE_RECT, info); 5862 mHandler.sendMessageDelayed(msg, delayMilliseconds); 5863 } 5864 5865 public void dispatchInvalidateOnAnimation(View view) { 5866 mInvalidateOnAnimationRunnable.addView(view); 5867 } 5868 5869 public void dispatchInvalidateRectOnAnimation(AttachInfo.InvalidateInfo info) { 5870 mInvalidateOnAnimationRunnable.addViewRect(info); 5871 } 5872 5873 public void cancelInvalidate(View view) { 5874 mHandler.removeMessages(MSG_INVALIDATE, view); 5875 // fixme: might leak the AttachInfo.InvalidateInfo objects instead of returning 5876 // them to the pool 5877 mHandler.removeMessages(MSG_INVALIDATE_RECT, view); 5878 mInvalidateOnAnimationRunnable.removeView(view); 5879 } 5880 5881 public void dispatchInputEvent(InputEvent event) { 5882 dispatchInputEvent(event, null); 5883 } 5884 5885 public void dispatchInputEvent(InputEvent event, InputEventReceiver receiver) { 5886 SomeArgs args = SomeArgs.obtain(); 5887 args.arg1 = event; 5888 args.arg2 = receiver; 5889 Message msg = mHandler.obtainMessage(MSG_DISPATCH_INPUT_EVENT, args); 5890 msg.setAsynchronous(true); 5891 mHandler.sendMessage(msg); 5892 } 5893 5894 public void synthesizeInputEvent(InputEvent event) { 5895 Message msg = mHandler.obtainMessage(MSG_SYNTHESIZE_INPUT_EVENT, event); 5896 msg.setAsynchronous(true); 5897 mHandler.sendMessage(msg); 5898 } 5899 5900 public void dispatchKeyFromIme(KeyEvent event) { 5901 Message msg = mHandler.obtainMessage(MSG_DISPATCH_KEY_FROM_IME, event); 5902 msg.setAsynchronous(true); 5903 mHandler.sendMessage(msg); 5904 } 5905 5906 /** 5907 * Reinject unhandled {@link InputEvent}s in order to synthesize fallbacks events. 5908 * 5909 * Note that it is the responsibility of the caller of this API to recycle the InputEvent it 5910 * passes in. 5911 */ 5912 public void dispatchUnhandledInputEvent(InputEvent event) { 5913 if (event instanceof MotionEvent) { 5914 event = MotionEvent.obtain((MotionEvent) event); 5915 } 5916 synthesizeInputEvent(event); 5917 } 5918 5919 public void dispatchAppVisibility(boolean visible) { 5920 Message msg = mHandler.obtainMessage(MSG_DISPATCH_APP_VISIBILITY); 5921 msg.arg1 = visible ? 1 : 0; 5922 mHandler.sendMessage(msg); 5923 } 5924 5925 public void dispatchGetNewSurface() { 5926 Message msg = mHandler.obtainMessage(MSG_DISPATCH_GET_NEW_SURFACE); 5927 mHandler.sendMessage(msg); 5928 } 5929 5930 public void windowFocusChanged(boolean hasFocus, boolean inTouchMode) { 5931 Message msg = Message.obtain(); 5932 msg.what = MSG_WINDOW_FOCUS_CHANGED; 5933 msg.arg1 = hasFocus ? 1 : 0; 5934 msg.arg2 = inTouchMode ? 1 : 0; 5935 mHandler.sendMessage(msg); 5936 } 5937 5938 public void dispatchCloseSystemDialogs(String reason) { 5939 Message msg = Message.obtain(); 5940 msg.what = MSG_CLOSE_SYSTEM_DIALOGS; 5941 msg.obj = reason; 5942 mHandler.sendMessage(msg); 5943 } 5944 5945 public void dispatchDragEvent(DragEvent event) { 5946 final int what; 5947 if (event.getAction() == DragEvent.ACTION_DRAG_LOCATION) { 5948 what = MSG_DISPATCH_DRAG_LOCATION_EVENT; 5949 mHandler.removeMessages(what); 5950 } else { 5951 what = MSG_DISPATCH_DRAG_EVENT; 5952 } 5953 Message msg = mHandler.obtainMessage(what, event); 5954 mHandler.sendMessage(msg); 5955 } 5956 5957 public void dispatchSystemUiVisibilityChanged(int seq, int globalVisibility, 5958 int localValue, int localChanges) { 5959 SystemUiVisibilityInfo args = new SystemUiVisibilityInfo(); 5960 args.seq = seq; 5961 args.globalVisibility = globalVisibility; 5962 args.localValue = localValue; 5963 args.localChanges = localChanges; 5964 mHandler.sendMessage(mHandler.obtainMessage(MSG_DISPATCH_SYSTEM_UI_VISIBILITY, args)); 5965 } 5966 5967 public void dispatchDoneAnimating() { 5968 mHandler.sendEmptyMessage(MSG_DISPATCH_DONE_ANIMATING); 5969 } 5970 5971 public void dispatchCheckFocus() { 5972 if (!mHandler.hasMessages(MSG_CHECK_FOCUS)) { 5973 // This will result in a call to checkFocus() below. 5974 mHandler.sendEmptyMessage(MSG_CHECK_FOCUS); 5975 } 5976 } 5977 5978 /** 5979 * Post a callback to send a 5980 * {@link AccessibilityEvent#TYPE_WINDOW_CONTENT_CHANGED} event. 5981 * This event is send at most once every 5982 * {@link ViewConfiguration#getSendRecurringAccessibilityEventsInterval()}. 5983 */ 5984 private void postSendWindowContentChangedCallback(View source, int changeType) { 5985 if (mSendWindowContentChangedAccessibilityEvent == null) { 5986 mSendWindowContentChangedAccessibilityEvent = 5987 new SendWindowContentChangedAccessibilityEvent(); 5988 } 5989 mSendWindowContentChangedAccessibilityEvent.runOrPost(source, changeType); 5990 } 5991 5992 /** 5993 * Remove a posted callback to send a 5994 * {@link AccessibilityEvent#TYPE_WINDOW_CONTENT_CHANGED} event. 5995 */ 5996 private void removeSendWindowContentChangedCallback() { 5997 if (mSendWindowContentChangedAccessibilityEvent != null) { 5998 mHandler.removeCallbacks(mSendWindowContentChangedAccessibilityEvent); 5999 } 6000 } 6001 6002 @Override 6003 public boolean showContextMenuForChild(View originalView) { 6004 return false; 6005 } 6006 6007 @Override 6008 public ActionMode startActionModeForChild(View originalView, ActionMode.Callback callback) { 6009 return null; 6010 } 6011 6012 @Override 6013 public void createContextMenu(ContextMenu menu) { 6014 } 6015 6016 @Override 6017 public void childDrawableStateChanged(View child) { 6018 } 6019 6020 @Override 6021 public boolean requestSendAccessibilityEvent(View child, AccessibilityEvent event) { 6022 if (mView == null) { 6023 return false; 6024 } 6025 // Intercept accessibility focus events fired by virtual nodes to keep 6026 // track of accessibility focus position in such nodes. 6027 final int eventType = event.getEventType(); 6028 switch (eventType) { 6029 case AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED: { 6030 final long sourceNodeId = event.getSourceNodeId(); 6031 final int accessibilityViewId = AccessibilityNodeInfo.getAccessibilityViewId( 6032 sourceNodeId); 6033 View source = mView.findViewByAccessibilityId(accessibilityViewId); 6034 if (source != null) { 6035 AccessibilityNodeProvider provider = source.getAccessibilityNodeProvider(); 6036 if (provider != null) { 6037 AccessibilityNodeInfo node = provider.createAccessibilityNodeInfo( 6038 AccessibilityNodeInfo.getVirtualDescendantId(sourceNodeId)); 6039 setAccessibilityFocus(source, node); 6040 } 6041 } 6042 } break; 6043 case AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED: { 6044 final long sourceNodeId = event.getSourceNodeId(); 6045 final int accessibilityViewId = AccessibilityNodeInfo.getAccessibilityViewId( 6046 sourceNodeId); 6047 View source = mView.findViewByAccessibilityId(accessibilityViewId); 6048 if (source != null) { 6049 AccessibilityNodeProvider provider = source.getAccessibilityNodeProvider(); 6050 if (provider != null) { 6051 setAccessibilityFocus(null, null); 6052 } 6053 } 6054 } break; 6055 } 6056 mAccessibilityManager.sendAccessibilityEvent(event); 6057 return true; 6058 } 6059 6060 @Override 6061 public void notifySubtreeAccessibilityStateChanged(View child, View source, int changeType) { 6062 postSendWindowContentChangedCallback(source, changeType); 6063 } 6064 6065 @Override 6066 public boolean canResolveLayoutDirection() { 6067 return true; 6068 } 6069 6070 @Override 6071 public boolean isLayoutDirectionResolved() { 6072 return true; 6073 } 6074 6075 @Override 6076 public int getLayoutDirection() { 6077 return View.LAYOUT_DIRECTION_RESOLVED_DEFAULT; 6078 } 6079 6080 @Override 6081 public boolean canResolveTextDirection() { 6082 return true; 6083 } 6084 6085 @Override 6086 public boolean isTextDirectionResolved() { 6087 return true; 6088 } 6089 6090 @Override 6091 public int getTextDirection() { 6092 return View.TEXT_DIRECTION_RESOLVED_DEFAULT; 6093 } 6094 6095 @Override 6096 public boolean canResolveTextAlignment() { 6097 return true; 6098 } 6099 6100 @Override 6101 public boolean isTextAlignmentResolved() { 6102 return true; 6103 } 6104 6105 @Override 6106 public int getTextAlignment() { 6107 return View.TEXT_ALIGNMENT_RESOLVED_DEFAULT; 6108 } 6109 6110 private View getCommonPredecessor(View first, View second) { 6111 if (mAttachInfo != null) { 6112 if (mTempHashSet == null) { 6113 mTempHashSet = new HashSet<View>(); 6114 } 6115 HashSet<View> seen = mTempHashSet; 6116 seen.clear(); 6117 View firstCurrent = first; 6118 while (firstCurrent != null) { 6119 seen.add(firstCurrent); 6120 ViewParent firstCurrentParent = firstCurrent.mParent; 6121 if (firstCurrentParent instanceof View) { 6122 firstCurrent = (View) firstCurrentParent; 6123 } else { 6124 firstCurrent = null; 6125 } 6126 } 6127 View secondCurrent = second; 6128 while (secondCurrent != null) { 6129 if (seen.contains(secondCurrent)) { 6130 seen.clear(); 6131 return secondCurrent; 6132 } 6133 ViewParent secondCurrentParent = secondCurrent.mParent; 6134 if (secondCurrentParent instanceof View) { 6135 secondCurrent = (View) secondCurrentParent; 6136 } else { 6137 secondCurrent = null; 6138 } 6139 } 6140 seen.clear(); 6141 } 6142 return null; 6143 } 6144 6145 void checkThread() { 6146 if (mThread != Thread.currentThread()) { 6147 throw new CalledFromWrongThreadException( 6148 "Only the original thread that created a view hierarchy can touch its views."); 6149 } 6150 } 6151 6152 @Override 6153 public void requestDisallowInterceptTouchEvent(boolean disallowIntercept) { 6154 // ViewAncestor never intercepts touch event, so this can be a no-op 6155 } 6156 6157 @Override 6158 public boolean requestChildRectangleOnScreen(View child, Rect rectangle, boolean immediate) { 6159 final boolean scrolled = scrollToRectOrFocus(rectangle, immediate); 6160 if (rectangle != null) { 6161 mTempRect.set(rectangle); 6162 mTempRect.offset(0, -mCurScrollY); 6163 mTempRect.offset(mAttachInfo.mWindowLeft, mAttachInfo.mWindowTop); 6164 try { 6165 mWindowSession.onRectangleOnScreenRequested(mWindow, mTempRect, immediate); 6166 } catch (RemoteException re) { 6167 /* ignore */ 6168 } 6169 } 6170 return scrolled; 6171 } 6172 6173 @Override 6174 public void childHasTransientStateChanged(View child, boolean hasTransientState) { 6175 // Do nothing. 6176 } 6177 6178 @Override 6179 public boolean onStartNestedScroll(View child, View target, int nestedScrollAxes) { 6180 return false; 6181 } 6182 6183 @Override 6184 public void onStopNestedScroll(View target) { 6185 } 6186 6187 @Override 6188 public void onNestedScrollAccepted(View child, View target, int nestedScrollAxes) { 6189 } 6190 6191 @Override 6192 public void onNestedScroll(View target, int dxConsumed, int dyConsumed, 6193 int dxUnconsumed, int dyUnconsumed) { 6194 } 6195 6196 @Override 6197 public void onNestedPreScroll(View target, int dx, int dy, int[] consumed) { 6198 } 6199 6200 @Override 6201 public boolean onNestedFling(View target, float velocityX, float velocityY, boolean consumed) { 6202 return false; 6203 } 6204 6205 void changeCanvasOpacity(boolean opaque) { 6206 Log.d(TAG, "changeCanvasOpacity: opaque=" + opaque); 6207 if (mAttachInfo.mHardwareRenderer != null) { 6208 mAttachInfo.mHardwareRenderer.setOpaque(opaque); 6209 } 6210 } 6211 6212 class TakenSurfaceHolder extends BaseSurfaceHolder { 6213 @Override 6214 public boolean onAllowLockCanvas() { 6215 return mDrawingAllowed; 6216 } 6217 6218 @Override 6219 public void onRelayoutContainer() { 6220 // Not currently interesting -- from changing between fixed and layout size. 6221 } 6222 6223 @Override 6224 public void setFormat(int format) { 6225 ((RootViewSurfaceTaker)mView).setSurfaceFormat(format); 6226 } 6227 6228 @Override 6229 public void setType(int type) { 6230 ((RootViewSurfaceTaker)mView).setSurfaceType(type); 6231 } 6232 6233 @Override 6234 public void onUpdateSurface() { 6235 // We take care of format and type changes on our own. 6236 throw new IllegalStateException("Shouldn't be here"); 6237 } 6238 6239 @Override 6240 public boolean isCreating() { 6241 return mIsCreating; 6242 } 6243 6244 @Override 6245 public void setFixedSize(int width, int height) { 6246 throw new UnsupportedOperationException( 6247 "Currently only support sizing from layout"); 6248 } 6249 6250 @Override 6251 public void setKeepScreenOn(boolean screenOn) { 6252 ((RootViewSurfaceTaker)mView).setSurfaceKeepScreenOn(screenOn); 6253 } 6254 } 6255 6256 static class W extends IWindow.Stub { 6257 private final WeakReference<ViewRootImpl> mViewAncestor; 6258 private final IWindowSession mWindowSession; 6259 6260 W(ViewRootImpl viewAncestor) { 6261 mViewAncestor = new WeakReference<ViewRootImpl>(viewAncestor); 6262 mWindowSession = viewAncestor.mWindowSession; 6263 } 6264 6265 @Override 6266 public void resized(Rect frame, Rect overscanInsets, Rect contentInsets, 6267 Rect visibleInsets, boolean reportDraw, Configuration newConfig) { 6268 final ViewRootImpl viewAncestor = mViewAncestor.get(); 6269 if (viewAncestor != null) { 6270 viewAncestor.dispatchResized(frame, overscanInsets, contentInsets, 6271 visibleInsets, reportDraw, newConfig); 6272 } 6273 } 6274 6275 @Override 6276 public void moved(int newX, int newY) { 6277 final ViewRootImpl viewAncestor = mViewAncestor.get(); 6278 if (viewAncestor != null) { 6279 viewAncestor.dispatchMoved(newX, newY); 6280 } 6281 } 6282 6283 @Override 6284 public void dispatchAppVisibility(boolean visible) { 6285 final ViewRootImpl viewAncestor = mViewAncestor.get(); 6286 if (viewAncestor != null) { 6287 viewAncestor.dispatchAppVisibility(visible); 6288 } 6289 } 6290 6291 @Override 6292 public void dispatchGetNewSurface() { 6293 final ViewRootImpl viewAncestor = mViewAncestor.get(); 6294 if (viewAncestor != null) { 6295 viewAncestor.dispatchGetNewSurface(); 6296 } 6297 } 6298 6299 @Override 6300 public void windowFocusChanged(boolean hasFocus, boolean inTouchMode) { 6301 final ViewRootImpl viewAncestor = mViewAncestor.get(); 6302 if (viewAncestor != null) { 6303 viewAncestor.windowFocusChanged(hasFocus, inTouchMode); 6304 } 6305 } 6306 6307 private static int checkCallingPermission(String permission) { 6308 try { 6309 return ActivityManagerNative.getDefault().checkPermission( 6310 permission, Binder.getCallingPid(), Binder.getCallingUid()); 6311 } catch (RemoteException e) { 6312 return PackageManager.PERMISSION_DENIED; 6313 } 6314 } 6315 6316 @Override 6317 public void executeCommand(String command, String parameters, ParcelFileDescriptor out) { 6318 final ViewRootImpl viewAncestor = mViewAncestor.get(); 6319 if (viewAncestor != null) { 6320 final View view = viewAncestor.mView; 6321 if (view != null) { 6322 if (checkCallingPermission(Manifest.permission.DUMP) != 6323 PackageManager.PERMISSION_GRANTED) { 6324 throw new SecurityException("Insufficient permissions to invoke" 6325 + " executeCommand() from pid=" + Binder.getCallingPid() 6326 + ", uid=" + Binder.getCallingUid()); 6327 } 6328 6329 OutputStream clientStream = null; 6330 try { 6331 clientStream = new ParcelFileDescriptor.AutoCloseOutputStream(out); 6332 ViewDebug.dispatchCommand(view, command, parameters, clientStream); 6333 } catch (IOException e) { 6334 e.printStackTrace(); 6335 } finally { 6336 if (clientStream != null) { 6337 try { 6338 clientStream.close(); 6339 } catch (IOException e) { 6340 e.printStackTrace(); 6341 } 6342 } 6343 } 6344 } 6345 } 6346 } 6347 6348 @Override 6349 public void closeSystemDialogs(String reason) { 6350 final ViewRootImpl viewAncestor = mViewAncestor.get(); 6351 if (viewAncestor != null) { 6352 viewAncestor.dispatchCloseSystemDialogs(reason); 6353 } 6354 } 6355 6356 @Override 6357 public void dispatchWallpaperOffsets(float x, float y, float xStep, float yStep, 6358 boolean sync) { 6359 if (sync) { 6360 try { 6361 mWindowSession.wallpaperOffsetsComplete(asBinder()); 6362 } catch (RemoteException e) { 6363 } 6364 } 6365 } 6366 6367 @Override 6368 public void dispatchWallpaperCommand(String action, int x, int y, 6369 int z, Bundle extras, boolean sync) { 6370 if (sync) { 6371 try { 6372 mWindowSession.wallpaperCommandComplete(asBinder(), null); 6373 } catch (RemoteException e) { 6374 } 6375 } 6376 } 6377 6378 /* Drag/drop */ 6379 @Override 6380 public void dispatchDragEvent(DragEvent event) { 6381 final ViewRootImpl viewAncestor = mViewAncestor.get(); 6382 if (viewAncestor != null) { 6383 viewAncestor.dispatchDragEvent(event); 6384 } 6385 } 6386 6387 @Override 6388 public void dispatchSystemUiVisibilityChanged(int seq, int globalVisibility, 6389 int localValue, int localChanges) { 6390 final ViewRootImpl viewAncestor = mViewAncestor.get(); 6391 if (viewAncestor != null) { 6392 viewAncestor.dispatchSystemUiVisibilityChanged(seq, globalVisibility, 6393 localValue, localChanges); 6394 } 6395 } 6396 6397 @Override 6398 public void doneAnimating() { 6399 final ViewRootImpl viewAncestor = mViewAncestor.get(); 6400 if (viewAncestor != null) { 6401 viewAncestor.dispatchDoneAnimating(); 6402 } 6403 } 6404 } 6405 6406 public static final class CalledFromWrongThreadException extends AndroidRuntimeException { 6407 public CalledFromWrongThreadException(String msg) { 6408 super(msg); 6409 } 6410 } 6411 6412 static RunQueue getRunQueue() { 6413 RunQueue rq = sRunQueues.get(); 6414 if (rq != null) { 6415 return rq; 6416 } 6417 rq = new RunQueue(); 6418 sRunQueues.set(rq); 6419 return rq; 6420 } 6421 6422 /** 6423 * The run queue is used to enqueue pending work from Views when no Handler is 6424 * attached. The work is executed during the next call to performTraversals on 6425 * the thread. 6426 * @hide 6427 */ 6428 static final class RunQueue { 6429 private final ArrayList<HandlerAction> mActions = new ArrayList<HandlerAction>(); 6430 6431 void post(Runnable action) { 6432 postDelayed(action, 0); 6433 } 6434 6435 void postDelayed(Runnable action, long delayMillis) { 6436 HandlerAction handlerAction = new HandlerAction(); 6437 handlerAction.action = action; 6438 handlerAction.delay = delayMillis; 6439 6440 synchronized (mActions) { 6441 mActions.add(handlerAction); 6442 } 6443 } 6444 6445 void removeCallbacks(Runnable action) { 6446 final HandlerAction handlerAction = new HandlerAction(); 6447 handlerAction.action = action; 6448 6449 synchronized (mActions) { 6450 final ArrayList<HandlerAction> actions = mActions; 6451 6452 while (actions.remove(handlerAction)) { 6453 // Keep going 6454 } 6455 } 6456 } 6457 6458 void executeActions(Handler handler) { 6459 synchronized (mActions) { 6460 final ArrayList<HandlerAction> actions = mActions; 6461 final int count = actions.size(); 6462 6463 for (int i = 0; i < count; i++) { 6464 final HandlerAction handlerAction = actions.get(i); 6465 handler.postDelayed(handlerAction.action, handlerAction.delay); 6466 } 6467 6468 actions.clear(); 6469 } 6470 } 6471 6472 private static class HandlerAction { 6473 Runnable action; 6474 long delay; 6475 6476 @Override 6477 public boolean equals(Object o) { 6478 if (this == o) return true; 6479 if (o == null || getClass() != o.getClass()) return false; 6480 6481 HandlerAction that = (HandlerAction) o; 6482 return !(action != null ? !action.equals(that.action) : that.action != null); 6483 6484 } 6485 6486 @Override 6487 public int hashCode() { 6488 int result = action != null ? action.hashCode() : 0; 6489 result = 31 * result + (int) (delay ^ (delay >>> 32)); 6490 return result; 6491 } 6492 } 6493 } 6494 6495 /** 6496 * Class for managing the accessibility interaction connection 6497 * based on the global accessibility state. 6498 */ 6499 final class AccessibilityInteractionConnectionManager 6500 implements AccessibilityStateChangeListener { 6501 @Override 6502 public void onAccessibilityStateChanged(boolean enabled) { 6503 if (enabled) { 6504 ensureConnection(); 6505 if (mAttachInfo != null && mAttachInfo.mHasWindowFocus) { 6506 mView.sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED); 6507 View focusedView = mView.findFocus(); 6508 if (focusedView != null && focusedView != mView) { 6509 focusedView.sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_FOCUSED); 6510 } 6511 } 6512 } else { 6513 ensureNoConnection(); 6514 mHandler.obtainMessage(MSG_CLEAR_ACCESSIBILITY_FOCUS_HOST).sendToTarget(); 6515 } 6516 } 6517 6518 public void ensureConnection() { 6519 if (mAttachInfo != null) { 6520 final boolean registered = 6521 mAttachInfo.mAccessibilityWindowId != AccessibilityNodeInfo.UNDEFINED_ITEM_ID; 6522 if (!registered) { 6523 mAttachInfo.mAccessibilityWindowId = 6524 mAccessibilityManager.addAccessibilityInteractionConnection(mWindow, 6525 new AccessibilityInteractionConnection(ViewRootImpl.this)); 6526 } 6527 } 6528 } 6529 6530 public void ensureNoConnection() { 6531 final boolean registered = 6532 mAttachInfo.mAccessibilityWindowId != AccessibilityNodeInfo.UNDEFINED_ITEM_ID; 6533 if (registered) { 6534 mAttachInfo.mAccessibilityWindowId = AccessibilityNodeInfo.UNDEFINED_ITEM_ID; 6535 mAccessibilityManager.removeAccessibilityInteractionConnection(mWindow); 6536 } 6537 } 6538 } 6539 6540 /** 6541 * This class is an interface this ViewAncestor provides to the 6542 * AccessibilityManagerService to the latter can interact with 6543 * the view hierarchy in this ViewAncestor. 6544 */ 6545 static final class AccessibilityInteractionConnection 6546 extends IAccessibilityInteractionConnection.Stub { 6547 private final WeakReference<ViewRootImpl> mViewRootImpl; 6548 6549 AccessibilityInteractionConnection(ViewRootImpl viewRootImpl) { 6550 mViewRootImpl = new WeakReference<ViewRootImpl>(viewRootImpl); 6551 } 6552 6553 @Override 6554 public void findAccessibilityNodeInfoByAccessibilityId(long accessibilityNodeId, 6555 int interactionId, IAccessibilityInteractionConnectionCallback callback, int flags, 6556 int interrogatingPid, long interrogatingTid, MagnificationSpec spec) { 6557 ViewRootImpl viewRootImpl = mViewRootImpl.get(); 6558 if (viewRootImpl != null && viewRootImpl.mView != null) { 6559 viewRootImpl.getAccessibilityInteractionController() 6560 .findAccessibilityNodeInfoByAccessibilityIdClientThread(accessibilityNodeId, 6561 interactionId, callback, flags, interrogatingPid, interrogatingTid, 6562 spec); 6563 } else { 6564 // We cannot make the call and notify the caller so it does not wait. 6565 try { 6566 callback.setFindAccessibilityNodeInfosResult(null, interactionId); 6567 } catch (RemoteException re) { 6568 /* best effort - ignore */ 6569 } 6570 } 6571 } 6572 6573 @Override 6574 public void performAccessibilityAction(long accessibilityNodeId, int action, 6575 Bundle arguments, int interactionId, 6576 IAccessibilityInteractionConnectionCallback callback, int flags, 6577 int interogatingPid, long interrogatingTid) { 6578 ViewRootImpl viewRootImpl = mViewRootImpl.get(); 6579 if (viewRootImpl != null && viewRootImpl.mView != null) { 6580 viewRootImpl.getAccessibilityInteractionController() 6581 .performAccessibilityActionClientThread(accessibilityNodeId, action, arguments, 6582 interactionId, callback, flags, interogatingPid, interrogatingTid); 6583 } else { 6584 // We cannot make the call and notify the caller so it does not wait. 6585 try { 6586 callback.setPerformAccessibilityActionResult(false, interactionId); 6587 } catch (RemoteException re) { 6588 /* best effort - ignore */ 6589 } 6590 } 6591 } 6592 6593 @Override 6594 public void findAccessibilityNodeInfosByViewId(long accessibilityNodeId, 6595 String viewId, int interactionId, 6596 IAccessibilityInteractionConnectionCallback callback, int flags, 6597 int interrogatingPid, long interrogatingTid, MagnificationSpec spec) { 6598 ViewRootImpl viewRootImpl = mViewRootImpl.get(); 6599 if (viewRootImpl != null && viewRootImpl.mView != null) { 6600 viewRootImpl.getAccessibilityInteractionController() 6601 .findAccessibilityNodeInfosByViewIdClientThread(accessibilityNodeId, 6602 viewId, interactionId, callback, flags, interrogatingPid, 6603 interrogatingTid, spec); 6604 } else { 6605 // We cannot make the call and notify the caller so it does not wait. 6606 try { 6607 callback.setFindAccessibilityNodeInfoResult(null, interactionId); 6608 } catch (RemoteException re) { 6609 /* best effort - ignore */ 6610 } 6611 } 6612 } 6613 6614 @Override 6615 public void findAccessibilityNodeInfosByText(long accessibilityNodeId, String text, 6616 int interactionId, IAccessibilityInteractionConnectionCallback callback, int flags, 6617 int interrogatingPid, long interrogatingTid, MagnificationSpec spec) { 6618 ViewRootImpl viewRootImpl = mViewRootImpl.get(); 6619 if (viewRootImpl != null && viewRootImpl.mView != null) { 6620 viewRootImpl.getAccessibilityInteractionController() 6621 .findAccessibilityNodeInfosByTextClientThread(accessibilityNodeId, text, 6622 interactionId, callback, flags, interrogatingPid, interrogatingTid, 6623 spec); 6624 } else { 6625 // We cannot make the call and notify the caller so it does not wait. 6626 try { 6627 callback.setFindAccessibilityNodeInfosResult(null, interactionId); 6628 } catch (RemoteException re) { 6629 /* best effort - ignore */ 6630 } 6631 } 6632 } 6633 6634 @Override 6635 public void findFocus(long accessibilityNodeId, int focusType, int interactionId, 6636 IAccessibilityInteractionConnectionCallback callback, int flags, 6637 int interrogatingPid, long interrogatingTid, MagnificationSpec spec) { 6638 ViewRootImpl viewRootImpl = mViewRootImpl.get(); 6639 if (viewRootImpl != null && viewRootImpl.mView != null) { 6640 viewRootImpl.getAccessibilityInteractionController() 6641 .findFocusClientThread(accessibilityNodeId, focusType, interactionId, callback, 6642 flags, interrogatingPid, interrogatingTid, spec); 6643 } else { 6644 // We cannot make the call and notify the caller so it does not wait. 6645 try { 6646 callback.setFindAccessibilityNodeInfoResult(null, interactionId); 6647 } catch (RemoteException re) { 6648 /* best effort - ignore */ 6649 } 6650 } 6651 } 6652 6653 @Override 6654 public void focusSearch(long accessibilityNodeId, int direction, int interactionId, 6655 IAccessibilityInteractionConnectionCallback callback, int flags, 6656 int interrogatingPid, long interrogatingTid, MagnificationSpec spec) { 6657 ViewRootImpl viewRootImpl = mViewRootImpl.get(); 6658 if (viewRootImpl != null && viewRootImpl.mView != null) { 6659 viewRootImpl.getAccessibilityInteractionController() 6660 .focusSearchClientThread(accessibilityNodeId, direction, interactionId, 6661 callback, flags, interrogatingPid, interrogatingTid, spec); 6662 } else { 6663 // We cannot make the call and notify the caller so it does not wait. 6664 try { 6665 callback.setFindAccessibilityNodeInfoResult(null, interactionId); 6666 } catch (RemoteException re) { 6667 /* best effort - ignore */ 6668 } 6669 } 6670 } 6671 } 6672 6673 private class SendWindowContentChangedAccessibilityEvent implements Runnable { 6674 private int mChangeTypes = 0; 6675 6676 public View mSource; 6677 public long mLastEventTimeMillis; 6678 6679 @Override 6680 public void run() { 6681 // The accessibility may be turned off while we were waiting so check again. 6682 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 6683 mLastEventTimeMillis = SystemClock.uptimeMillis(); 6684 AccessibilityEvent event = AccessibilityEvent.obtain(); 6685 event.setEventType(AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED); 6686 event.setContentChangeTypes(mChangeTypes); 6687 mSource.sendAccessibilityEventUnchecked(event); 6688 } else { 6689 mLastEventTimeMillis = 0; 6690 } 6691 // In any case reset to initial state. 6692 mSource.resetSubtreeAccessibilityStateChanged(); 6693 mSource = null; 6694 mChangeTypes = 0; 6695 } 6696 6697 public void runOrPost(View source, int changeType) { 6698 if (mSource != null) { 6699 // If there is no common predecessor, then mSource points to 6700 // a removed view, hence in this case always prefer the source. 6701 View predecessor = getCommonPredecessor(mSource, source); 6702 mSource = (predecessor != null) ? predecessor : source; 6703 mChangeTypes |= changeType; 6704 return; 6705 } 6706 mSource = source; 6707 mChangeTypes = changeType; 6708 final long timeSinceLastMillis = SystemClock.uptimeMillis() - mLastEventTimeMillis; 6709 final long minEventIntevalMillis = 6710 ViewConfiguration.getSendRecurringAccessibilityEventsInterval(); 6711 if (timeSinceLastMillis >= minEventIntevalMillis) { 6712 mSource.removeCallbacks(this); 6713 run(); 6714 } else { 6715 mSource.postDelayed(this, minEventIntevalMillis - timeSinceLastMillis); 6716 } 6717 } 6718 } 6719} 6720