Aurimas Liutikas | 88c7ff1 | 2023-08-10 12:42:26 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2015 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.server.wm; |
| 18 | |
| 19 | import static android.app.ActivityTaskManager.RESIZE_MODE_USER; |
| 20 | import static android.app.ActivityTaskManager.RESIZE_MODE_USER_FORCED; |
| 21 | import static android.os.InputConstants.DEFAULT_DISPATCHING_TIMEOUT_MILLIS; |
| 22 | import static android.os.Trace.TRACE_TAG_WINDOW_MANAGER; |
| 23 | |
| 24 | import static com.android.internal.policy.TaskResizingAlgorithm.CTRL_BOTTOM; |
| 25 | import static com.android.internal.policy.TaskResizingAlgorithm.CTRL_LEFT; |
| 26 | import static com.android.internal.policy.TaskResizingAlgorithm.CTRL_NONE; |
| 27 | import static com.android.internal.policy.TaskResizingAlgorithm.CTRL_RIGHT; |
| 28 | import static com.android.internal.policy.TaskResizingAlgorithm.CTRL_TOP; |
| 29 | import static com.android.internal.protolog.ProtoLogGroup.WM_DEBUG_ORIENTATION; |
| 30 | import static com.android.server.wm.WindowManagerDebugConfig.DEBUG_TASK_POSITIONING; |
| 31 | import static com.android.server.wm.WindowManagerDebugConfig.TAG_WITH_CLASS_NAME; |
| 32 | import static com.android.server.wm.WindowManagerDebugConfig.TAG_WM; |
| 33 | import static com.android.server.wm.WindowManagerService.dipToPixel; |
| 34 | import static com.android.server.wm.WindowState.MINIMUM_VISIBLE_HEIGHT_IN_DP; |
| 35 | import static com.android.server.wm.WindowState.MINIMUM_VISIBLE_WIDTH_IN_DP; |
| 36 | |
| 37 | import static java.util.concurrent.CompletableFuture.completedFuture; |
| 38 | |
| 39 | import android.annotation.NonNull; |
| 40 | import android.graphics.Point; |
| 41 | import android.graphics.Rect; |
| 42 | import android.os.Binder; |
| 43 | import android.os.IBinder; |
| 44 | import android.os.InputConfig; |
| 45 | import android.os.RemoteException; |
| 46 | import android.os.Trace; |
| 47 | import android.util.DisplayMetrics; |
| 48 | import android.util.Slog; |
| 49 | import android.view.BatchedInputEventReceiver; |
| 50 | import android.view.InputApplicationHandle; |
| 51 | import android.view.InputChannel; |
| 52 | import android.view.InputDevice; |
| 53 | import android.view.InputEvent; |
| 54 | import android.view.InputEventReceiver; |
| 55 | import android.view.InputWindowHandle; |
| 56 | import android.view.MotionEvent; |
| 57 | import android.view.WindowManager; |
| 58 | |
| 59 | import com.android.internal.annotations.VisibleForTesting; |
| 60 | import com.android.internal.policy.TaskResizingAlgorithm; |
| 61 | import com.android.internal.policy.TaskResizingAlgorithm.CtrlType; |
| 62 | import com.android.internal.protolog.common.ProtoLog; |
| 63 | |
| 64 | import java.util.concurrent.CompletableFuture; |
| 65 | |
| 66 | class TaskPositioner implements IBinder.DeathRecipient { |
| 67 | private static final boolean DEBUG_ORIENTATION_VIOLATIONS = false; |
| 68 | private static final String TAG_LOCAL = "TaskPositioner"; |
| 69 | private static final String TAG = TAG_WITH_CLASS_NAME ? TAG_LOCAL : TAG_WM; |
| 70 | |
| 71 | private static Factory sFactory; |
| 72 | |
| 73 | public static final float RESIZING_HINT_ALPHA = 0.5f; |
| 74 | |
| 75 | public static final int RESIZING_HINT_DURATION_MS = 0; |
| 76 | |
| 77 | private final WindowManagerService mService; |
| 78 | private InputEventReceiver mInputEventReceiver; |
| 79 | private DisplayContent mDisplayContent; |
| 80 | private Rect mTmpRect = new Rect(); |
| 81 | private int mMinVisibleWidth; |
| 82 | private int mMinVisibleHeight; |
| 83 | |
| 84 | @VisibleForTesting |
| 85 | Task mTask; |
| 86 | WindowState mWindow; |
| 87 | private boolean mResizing; |
| 88 | private boolean mPreserveOrientation; |
| 89 | private boolean mStartOrientationWasLandscape; |
| 90 | private final Rect mWindowOriginalBounds = new Rect(); |
| 91 | private final Rect mWindowDragBounds = new Rect(); |
| 92 | private final Point mMaxVisibleSize = new Point(); |
| 93 | private float mStartDragX; |
| 94 | private float mStartDragY; |
| 95 | @CtrlType |
| 96 | private int mCtrlType = CTRL_NONE; |
| 97 | @VisibleForTesting |
| 98 | boolean mDragEnded; |
| 99 | IBinder mClientCallback; |
| 100 | |
| 101 | InputChannel mClientChannel; |
| 102 | InputApplicationHandle mDragApplicationHandle; |
| 103 | InputWindowHandle mDragWindowHandle; |
| 104 | |
| 105 | /** Use {@link #create(WindowManagerService)} instead. */ |
| 106 | @VisibleForTesting |
| 107 | TaskPositioner(WindowManagerService service) { |
| 108 | mService = service; |
| 109 | } |
| 110 | |
| 111 | private boolean onInputEvent(InputEvent event) { |
| 112 | // All returns need to be in the try block to make sure the finishInputEvent is |
| 113 | // called correctly. |
| 114 | if (!(event instanceof MotionEvent) |
| 115 | || (event.getSource() & InputDevice.SOURCE_CLASS_POINTER) == 0) { |
| 116 | return false; |
| 117 | } |
| 118 | final MotionEvent motionEvent = (MotionEvent) event; |
| 119 | if (mDragEnded) { |
| 120 | // The drag has ended but the clean-up message has not been processed by |
| 121 | // window manager. Drop events that occur after this until window manager |
| 122 | // has a chance to clean-up the input handle. |
| 123 | return true; |
| 124 | } |
| 125 | |
| 126 | final float newX = motionEvent.getRawX(); |
| 127 | final float newY = motionEvent.getRawY(); |
| 128 | |
| 129 | switch (motionEvent.getAction()) { |
| 130 | case MotionEvent.ACTION_DOWN: { |
| 131 | if (DEBUG_TASK_POSITIONING) { |
| 132 | Slog.w(TAG, "ACTION_DOWN @ {" + newX + ", " + newY + "}"); |
| 133 | } |
| 134 | } |
| 135 | break; |
| 136 | |
| 137 | case MotionEvent.ACTION_MOVE: { |
| 138 | if (DEBUG_TASK_POSITIONING) { |
| 139 | Slog.w(TAG, "ACTION_MOVE @ {" + newX + ", " + newY + "}"); |
| 140 | } |
| 141 | synchronized (mService.mGlobalLock) { |
| 142 | mDragEnded = notifyMoveLocked(newX, newY); |
| 143 | mTask.getDimBounds(mTmpRect); |
| 144 | } |
| 145 | if (!mTmpRect.equals(mWindowDragBounds)) { |
| 146 | Trace.traceBegin(TRACE_TAG_WINDOW_MANAGER, |
| 147 | "wm.TaskPositioner.resizeTask"); |
| 148 | mService.mAtmService.resizeTask( |
| 149 | mTask.mTaskId, mWindowDragBounds, RESIZE_MODE_USER); |
| 150 | Trace.traceEnd(Trace.TRACE_TAG_WINDOW_MANAGER); |
| 151 | } |
| 152 | } |
| 153 | break; |
| 154 | |
| 155 | case MotionEvent.ACTION_UP: { |
| 156 | if (DEBUG_TASK_POSITIONING) { |
| 157 | Slog.w(TAG, "ACTION_UP @ {" + newX + ", " + newY + "}"); |
| 158 | } |
| 159 | mDragEnded = true; |
| 160 | } |
| 161 | break; |
| 162 | |
| 163 | case MotionEvent.ACTION_CANCEL: { |
| 164 | if (DEBUG_TASK_POSITIONING) { |
| 165 | Slog.w(TAG, "ACTION_CANCEL @ {" + newX + ", " + newY + "}"); |
| 166 | } |
| 167 | mDragEnded = true; |
| 168 | } |
| 169 | break; |
| 170 | } |
| 171 | |
| 172 | if (mDragEnded) { |
| 173 | final boolean wasResizing = mResizing; |
| 174 | synchronized (mService.mGlobalLock) { |
| 175 | endDragLocked(); |
| 176 | mTask.getDimBounds(mTmpRect); |
| 177 | } |
| 178 | if (wasResizing && !mTmpRect.equals(mWindowDragBounds)) { |
| 179 | // We were using fullscreen surface during resizing. Request |
| 180 | // resizeTask() one last time to restore surface to window size. |
| 181 | mService.mAtmService.resizeTask( |
| 182 | mTask.mTaskId, mWindowDragBounds, RESIZE_MODE_USER_FORCED); |
| 183 | } |
| 184 | |
| 185 | // Post back to WM to handle clean-ups. We still need the input |
| 186 | // event handler for the last finishInputEvent()! |
| 187 | mService.mTaskPositioningController.finishTaskPositioning(); |
| 188 | } |
| 189 | return true; |
| 190 | } |
| 191 | |
| 192 | @VisibleForTesting |
| 193 | Rect getWindowDragBounds() { |
| 194 | return mWindowDragBounds; |
| 195 | } |
| 196 | |
| 197 | /** |
| 198 | * @param displayContent The Display that the window being dragged is on. |
| 199 | * @param win The window which will be dragged. |
| 200 | */ |
| 201 | CompletableFuture<Void> register(DisplayContent displayContent, @NonNull WindowState win) { |
| 202 | if (DEBUG_TASK_POSITIONING) { |
| 203 | Slog.d(TAG, "Registering task positioner"); |
| 204 | } |
| 205 | |
| 206 | if (mClientChannel != null) { |
| 207 | Slog.e(TAG, "Task positioner already registered"); |
| 208 | return completedFuture(null); |
| 209 | } |
| 210 | |
| 211 | mDisplayContent = displayContent; |
| 212 | mClientChannel = mService.mInputManager.createInputChannel(TAG); |
| 213 | |
| 214 | mInputEventReceiver = new BatchedInputEventReceiver.SimpleBatchedInputEventReceiver( |
| 215 | mClientChannel, mService.mAnimationHandler.getLooper(), |
| 216 | mService.mAnimator.getChoreographer(), this::onInputEvent); |
| 217 | |
| 218 | mDragApplicationHandle = new InputApplicationHandle(new Binder(), TAG, |
| 219 | DEFAULT_DISPATCHING_TIMEOUT_MILLIS); |
| 220 | |
| 221 | mDragWindowHandle = new InputWindowHandle(mDragApplicationHandle, |
| 222 | displayContent.getDisplayId()); |
| 223 | mDragWindowHandle.name = TAG; |
| 224 | mDragWindowHandle.token = mClientChannel.getToken(); |
| 225 | mDragWindowHandle.layoutParamsType = WindowManager.LayoutParams.TYPE_DRAG; |
| 226 | mDragWindowHandle.dispatchingTimeoutMillis = DEFAULT_DISPATCHING_TIMEOUT_MILLIS; |
| 227 | mDragWindowHandle.ownerPid = WindowManagerService.MY_PID; |
| 228 | mDragWindowHandle.ownerUid = WindowManagerService.MY_UID; |
| 229 | mDragWindowHandle.scaleFactor = 1.0f; |
| 230 | // When dragging the window around, we do not want to steal focus for the window. |
| 231 | mDragWindowHandle.inputConfig = InputConfig.NOT_FOCUSABLE; |
| 232 | |
| 233 | // The drag window cannot receive new touches. |
| 234 | mDragWindowHandle.touchableRegion.setEmpty(); |
| 235 | |
| 236 | // Pause rotations before a drag. |
| 237 | ProtoLog.d(WM_DEBUG_ORIENTATION, "Pausing rotation during re-position"); |
| 238 | mDisplayContent.getDisplayRotation().pause(); |
| 239 | |
| 240 | // Notify InputMonitor to take mDragWindowHandle. |
| 241 | return mService.mTaskPositioningController.showInputSurface(win.getDisplayId()) |
| 242 | .thenRun(() -> { |
| 243 | // The global lock is held by the callers of register but released before the async |
| 244 | // results are waited on. We must acquire the lock in this callback to ensure thread |
| 245 | // safety. |
| 246 | synchronized (mService.mGlobalLock) { |
| 247 | final Rect displayBounds = mTmpRect; |
| 248 | displayContent.getBounds(displayBounds); |
| 249 | final DisplayMetrics displayMetrics = displayContent.getDisplayMetrics(); |
| 250 | mMinVisibleWidth = dipToPixel(MINIMUM_VISIBLE_WIDTH_IN_DP, displayMetrics); |
| 251 | mMinVisibleHeight = dipToPixel(MINIMUM_VISIBLE_HEIGHT_IN_DP, displayMetrics); |
| 252 | mMaxVisibleSize.set(displayBounds.width(), displayBounds.height()); |
| 253 | |
| 254 | mDragEnded = false; |
| 255 | |
| 256 | try { |
| 257 | mClientCallback = win.mClient.asBinder(); |
| 258 | mClientCallback.linkToDeath(this, 0 /* flags */); |
| 259 | } catch (RemoteException e) { |
| 260 | // The caller has died, so clean up TaskPositioningController. |
| 261 | mService.mTaskPositioningController.finishTaskPositioning(); |
| 262 | return; |
| 263 | } |
| 264 | mWindow = win; |
| 265 | mTask = win.getTask(); |
| 266 | } |
| 267 | }); |
| 268 | } |
| 269 | |
| 270 | void unregister() { |
| 271 | if (DEBUG_TASK_POSITIONING) { |
| 272 | Slog.d(TAG, "Unregistering task positioner"); |
| 273 | } |
| 274 | |
| 275 | if (mClientChannel == null) { |
| 276 | Slog.e(TAG, "Task positioner not registered"); |
| 277 | return; |
| 278 | } |
| 279 | |
| 280 | mService.mTaskPositioningController.hideInputSurface(mDisplayContent.getDisplayId()); |
| 281 | mService.mInputManager.removeInputChannel(mClientChannel.getToken()); |
| 282 | |
| 283 | mInputEventReceiver.dispose(); |
| 284 | mInputEventReceiver = null; |
| 285 | mClientChannel.dispose(); |
| 286 | mClientChannel = null; |
| 287 | |
| 288 | mDragWindowHandle = null; |
| 289 | mDragApplicationHandle = null; |
| 290 | mDragEnded = true; |
| 291 | |
| 292 | // Notify InputMonitor to remove mDragWindowHandle. |
| 293 | mDisplayContent.getInputMonitor().updateInputWindowsLw(true /*force*/); |
| 294 | |
| 295 | // Resume rotations after a drag. |
| 296 | ProtoLog.d(WM_DEBUG_ORIENTATION, "Resuming rotation after re-position"); |
| 297 | mDisplayContent.getDisplayRotation().resume(); |
| 298 | mDisplayContent = null; |
| 299 | if (mClientCallback != null) { |
| 300 | mClientCallback.unlinkToDeath(this, 0 /* flags */); |
| 301 | } |
| 302 | mWindow = null; |
| 303 | } |
| 304 | |
| 305 | /** |
| 306 | * Starts moving or resizing the task. This method should be only called from |
| 307 | * {@link TaskPositioningController#startPositioningLocked} or unit tests. |
| 308 | */ |
| 309 | void startDrag(boolean resize, boolean preserveOrientation, float startX, float startY) { |
| 310 | if (DEBUG_TASK_POSITIONING) { |
| 311 | Slog.d(TAG, "startDrag: win=" + mWindow + ", resize=" + resize |
| 312 | + ", preserveOrientation=" + preserveOrientation + ", {" + startX + ", " |
| 313 | + startY + "}"); |
| 314 | } |
| 315 | // Use the bounds of the task which accounts for |
| 316 | // multiple app windows. Don't use any bounds from win itself as it |
| 317 | // may not be the same size as the task. |
| 318 | final Rect startBounds = mTmpRect; |
| 319 | mTask.getBounds(startBounds); |
| 320 | |
| 321 | mCtrlType = CTRL_NONE; |
| 322 | mStartDragX = startX; |
| 323 | mStartDragY = startY; |
| 324 | mPreserveOrientation = preserveOrientation; |
| 325 | |
| 326 | if (resize) { |
| 327 | if (startX < startBounds.left) { |
| 328 | mCtrlType |= CTRL_LEFT; |
| 329 | } |
| 330 | if (startX > startBounds.right) { |
| 331 | mCtrlType |= CTRL_RIGHT; |
| 332 | } |
| 333 | if (startY < startBounds.top) { |
| 334 | mCtrlType |= CTRL_TOP; |
| 335 | } |
| 336 | if (startY > startBounds.bottom) { |
| 337 | mCtrlType |= CTRL_BOTTOM; |
| 338 | } |
| 339 | mResizing = mCtrlType != CTRL_NONE; |
| 340 | } |
| 341 | |
| 342 | // In case of !isDockedInEffect we are using the union of all task bounds. These might be |
| 343 | // made up out of multiple windows which are only partially overlapping. When that happens, |
| 344 | // the orientation from the window of interest to the entire stack might diverge. However |
| 345 | // for now we treat them as the same. |
| 346 | mStartOrientationWasLandscape = startBounds.width() >= startBounds.height(); |
| 347 | mWindowOriginalBounds.set(startBounds); |
| 348 | |
| 349 | // Notify the app that resizing has started, even though we haven't received any new |
| 350 | // bounds yet. This will guarantee that the app starts the backdrop renderer before |
| 351 | // configuration changes which could cause an activity restart. |
| 352 | if (mResizing) { |
| 353 | notifyMoveLocked(startX, startY); |
| 354 | |
| 355 | // The WindowPositionerEventReceiver callbacks are delivered on the same handler so this |
| 356 | // initial resize is always guaranteed to happen before subsequent drag resizes. |
| 357 | mService.mH.post(() -> { |
| 358 | mService.mAtmService.resizeTask( |
| 359 | mTask.mTaskId, startBounds, RESIZE_MODE_USER_FORCED); |
| 360 | }); |
| 361 | } |
| 362 | |
| 363 | // Make sure we always have valid drag bounds even if the drag ends before any move events |
| 364 | // have been handled. |
| 365 | mWindowDragBounds.set(startBounds); |
| 366 | } |
| 367 | |
| 368 | private void endDragLocked() { |
| 369 | mResizing = false; |
| 370 | mTask.setDragResizing(false); |
| 371 | } |
| 372 | |
| 373 | /** Returns true if the move operation should be ended. */ |
| 374 | @VisibleForTesting |
| 375 | boolean notifyMoveLocked(float x, float y) { |
| 376 | if (DEBUG_TASK_POSITIONING) { |
| 377 | Slog.d(TAG, "notifyMoveLocked: {" + x + "," + y + "}"); |
| 378 | } |
| 379 | |
| 380 | if (mCtrlType != CTRL_NONE) { |
| 381 | resizeDrag(x, y); |
| 382 | mTask.setDragResizing(true); |
| 383 | return false; |
| 384 | } |
| 385 | |
| 386 | // This is a moving or scrolling operation. |
| 387 | // Only allow to move in stable area so the target window won't be covered by system bar. |
| 388 | // Though {@link Task#resolveOverrideConfiguration} should also avoid the case. |
| 389 | mDisplayContent.getStableRect(mTmpRect); |
| 390 | // The task may be put in a limited display area. |
| 391 | mTmpRect.intersect(mTask.getRootTask().getParent().getBounds()); |
| 392 | |
| 393 | int nX = (int) x; |
| 394 | int nY = (int) y; |
| 395 | if (!mTmpRect.contains(nX, nY)) { |
| 396 | // For a moving operation we allow the pointer to go out of the stack bounds, but |
| 397 | // use the clamped pointer position for the drag bounds computation. |
| 398 | nX = Math.min(Math.max(nX, mTmpRect.left), mTmpRect.right); |
| 399 | nY = Math.min(Math.max(nY, mTmpRect.top), mTmpRect.bottom); |
| 400 | } |
| 401 | |
| 402 | updateWindowDragBounds(nX, nY, mTmpRect); |
| 403 | return false; |
| 404 | } |
| 405 | |
| 406 | /** |
| 407 | * The user is drag - resizing the window. |
| 408 | * |
| 409 | * @param x The x coordinate of the current drag coordinate. |
| 410 | * @param y the y coordinate of the current drag coordinate. |
| 411 | */ |
| 412 | @VisibleForTesting |
| 413 | void resizeDrag(float x, float y) { |
| 414 | updateDraggedBounds(TaskResizingAlgorithm.resizeDrag(x, y, mStartDragX, mStartDragY, |
| 415 | mWindowOriginalBounds, mCtrlType, mMinVisibleWidth, mMinVisibleHeight, |
| 416 | mMaxVisibleSize, mPreserveOrientation, mStartOrientationWasLandscape)); |
| 417 | } |
| 418 | |
| 419 | private void updateDraggedBounds(Rect newBounds) { |
| 420 | mWindowDragBounds.set(newBounds); |
| 421 | |
| 422 | checkBoundsForOrientationViolations(mWindowDragBounds); |
| 423 | } |
| 424 | |
| 425 | /** |
| 426 | * Validate bounds against orientation violations (if DEBUG_ORIENTATION_VIOLATIONS is set). |
| 427 | * |
| 428 | * @param bounds The bounds to be checked. |
| 429 | */ |
| 430 | private void checkBoundsForOrientationViolations(Rect bounds) { |
| 431 | // When using debug check that we are not violating the given constraints. |
| 432 | if (DEBUG_ORIENTATION_VIOLATIONS) { |
| 433 | if (mStartOrientationWasLandscape != (bounds.width() >= bounds.height())) { |
| 434 | Slog.e(TAG, "Orientation violation detected! should be " |
| 435 | + (mStartOrientationWasLandscape ? "landscape" : "portrait") |
| 436 | + " but is the other"); |
| 437 | } else { |
| 438 | Slog.v(TAG, "new bounds size: " + bounds.width() + " x " + bounds.height()); |
| 439 | } |
| 440 | if (mMinVisibleWidth > bounds.width() || mMinVisibleHeight > bounds.height()) { |
| 441 | Slog.v(TAG, "Minimum requirement violated: Width(min, is)=(" + mMinVisibleWidth |
| 442 | + ", " + bounds.width() + ") Height(min,is)=(" |
| 443 | + mMinVisibleHeight + ", " + bounds.height() + ")"); |
| 444 | } |
| 445 | if (mMaxVisibleSize.x < bounds.width() || mMaxVisibleSize.y < bounds.height()) { |
| 446 | Slog.v(TAG, "Maximum requirement violated: Width(min, is)=(" + mMaxVisibleSize.x |
| 447 | + ", " + bounds.width() + ") Height(min,is)=(" |
| 448 | + mMaxVisibleSize.y + ", " + bounds.height() + ")"); |
| 449 | } |
| 450 | } |
| 451 | } |
| 452 | |
| 453 | private void updateWindowDragBounds(int x, int y, Rect rootTaskBounds) { |
| 454 | final int offsetX = Math.round(x - mStartDragX); |
| 455 | final int offsetY = Math.round(y - mStartDragY); |
| 456 | mWindowDragBounds.set(mWindowOriginalBounds); |
| 457 | // Horizontally, at least mMinVisibleWidth pixels of the window should remain visible. |
| 458 | final int maxLeft = rootTaskBounds.right - mMinVisibleWidth; |
| 459 | final int minLeft = rootTaskBounds.left + mMinVisibleWidth - mWindowOriginalBounds.width(); |
| 460 | |
| 461 | // Vertically, the top mMinVisibleHeight of the window should remain visible. |
| 462 | // (This assumes that the window caption bar is at the top of the window). |
| 463 | final int minTop = rootTaskBounds.top; |
| 464 | final int maxTop = rootTaskBounds.bottom - mMinVisibleHeight; |
| 465 | |
| 466 | mWindowDragBounds.offsetTo( |
| 467 | Math.min(Math.max(mWindowOriginalBounds.left + offsetX, minLeft), maxLeft), |
| 468 | Math.min(Math.max(mWindowOriginalBounds.top + offsetY, minTop), maxTop)); |
| 469 | |
| 470 | if (DEBUG_TASK_POSITIONING) Slog.d(TAG, |
| 471 | "updateWindowDragBounds: " + mWindowDragBounds); |
| 472 | } |
| 473 | |
| 474 | public String toShortString() { |
| 475 | return TAG; |
| 476 | } |
| 477 | |
| 478 | static void setFactory(Factory factory) { |
| 479 | sFactory = factory; |
| 480 | } |
| 481 | |
| 482 | static TaskPositioner create(WindowManagerService service) { |
| 483 | if (sFactory == null) { |
| 484 | sFactory = new Factory() {}; |
| 485 | } |
| 486 | |
| 487 | return sFactory.create(service); |
| 488 | } |
| 489 | |
| 490 | @Override |
| 491 | public void binderDied() { |
| 492 | mService.mTaskPositioningController.finishTaskPositioning(); |
| 493 | } |
| 494 | |
| 495 | interface Factory { |
| 496 | default TaskPositioner create(WindowManagerService service) { |
| 497 | return new TaskPositioner(service); |
| 498 | } |
| 499 | } |
| 500 | } |