1 /* 2 * Copyright (C) 2010 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 android.app.ActivityManagerNative; 20 import android.graphics.Rect; 21 import android.os.RemoteException; 22 import android.util.Log; 23 import android.util.Slog; 24 import android.view.Display; 25 import android.view.InputChannel; 26 import android.view.KeyEvent; 27 import android.view.WindowManager; 28 29 import com.android.server.input.InputApplicationHandle; 30 import com.android.server.input.InputManagerService; 31 import com.android.server.input.InputWindowHandle; 32 33 import java.util.Arrays; 34 35 final class InputMonitor implements InputManagerService.WindowManagerCallbacks { 36 private final WindowManagerService mService; 37 38 // Current window with input focus for keys and other non-touch events. May be null. 39 private WindowState mInputFocus; 40 41 // When true, prevents input dispatch from proceeding until set to false again. 42 private boolean mInputDispatchFrozen; 43 44 // When true, input dispatch proceeds normally. Otherwise all events are dropped. 45 // Initially false, so that input does not get dispatched until boot is finished at 46 // which point the ActivityManager will enable dispatching. 47 private boolean mInputDispatchEnabled; 48 49 // When true, need to call updateInputWindowsLw(). 50 private boolean mUpdateInputWindowsNeeded = true; 51 52 // Array of window handles to provide to the input dispatcher. 53 private InputWindowHandle[] mInputWindowHandles; 54 private int mInputWindowHandleCount; 55 56 // Set to true when the first input device configuration change notification 57 // is received to indicate that the input devices are ready. 58 private final Object mInputDevicesReadyMonitor = new Object(); 59 private boolean mInputDevicesReady; 60 61 Rect mTmpRect = new Rect(); 62 63 public InputMonitor(WindowManagerService service) { 64 mService = service; 65 } 66 67 /* Notifies the window manager about a broken input channel. 68 * 69 * Called by the InputManager. 70 */ 71 @Override 72 public void notifyInputChannelBroken(InputWindowHandle inputWindowHandle) { 73 if (inputWindowHandle == null) { 74 return; 75 } 76 77 synchronized (mService.mWindowMap) { 78 WindowState windowState = (WindowState) inputWindowHandle.windowState; 79 if (windowState != null) { 80 Slog.i(WindowManagerService.TAG, "WINDOW DIED " + windowState); 81 mService.removeWindowLocked(windowState); 82 } 83 } 84 } 85 86 /* Notifies the window manager about an application that is not responding. 87 * Returns a new timeout to continue waiting in nanoseconds, or 0 to abort dispatch. 88 * 89 * Called by the InputManager. 90 */ 91 @Override 92 public long notifyANR(InputApplicationHandle inputApplicationHandle, 93 InputWindowHandle inputWindowHandle, String reason) { 94 AppWindowToken appWindowToken = null; 95 WindowState windowState = null; 96 boolean aboveSystem = false; 97 synchronized (mService.mWindowMap) { 98 if (inputWindowHandle != null) { 99 windowState = (WindowState) inputWindowHandle.windowState; 100 if (windowState != null) { 101 appWindowToken = windowState.mAppToken; 102 } 103 } 104 if (appWindowToken == null && inputApplicationHandle != null) { 105 appWindowToken = (AppWindowToken)inputApplicationHandle.appWindowToken; 106 } 107 108 if (windowState != null) { 109 Slog.i(WindowManagerService.TAG, "Input event dispatching timed out " 110 + "sending to " + windowState.mAttrs.getTitle() 111 + ". Reason: " + reason); 112 // Figure out whether this window is layered above system windows. 113 // We need to do this here to help the activity manager know how to 114 // layer its ANR dialog. 115 int systemAlertLayer = mService.mPolicy.windowTypeToLayerLw( 116 WindowManager.LayoutParams.TYPE_SYSTEM_ALERT); 117 aboveSystem = windowState.mBaseLayer > systemAlertLayer; 118 } else if (appWindowToken != null) { 119 Slog.i(WindowManagerService.TAG, "Input event dispatching timed out " 120 + "sending to application " + appWindowToken.stringName 121 + ". Reason: " + reason); 122 } else { 123 Slog.i(WindowManagerService.TAG, "Input event dispatching timed out " 124 + ". Reason: " + reason); 125 } 126 127 mService.saveANRStateLocked(appWindowToken, windowState, reason); 128 } 129 130 if (appWindowToken != null && appWindowToken.appToken != null) { 131 try { 132 // Notify the activity manager about the timeout and let it decide whether 133 // to abort dispatching or keep waiting. 134 boolean abort = appWindowToken.appToken.keyDispatchingTimedOut(reason); 135 if (! abort) { 136 // The activity manager declined to abort dispatching. 137 // Wait a bit longer and timeout again later. 138 return appWindowToken.inputDispatchingTimeoutNanos; 139 } 140 } catch (RemoteException ex) { 141 } 142 } else if (windowState != null) { 143 try { 144 // Notify the activity manager about the timeout and let it decide whether 145 // to abort dispatching or keep waiting. 146 long timeout = ActivityManagerNative.getDefault().inputDispatchingTimedOut( 147 windowState.mSession.mPid, aboveSystem, reason); 148 if (timeout >= 0) { 149 // The activity manager declined to abort dispatching. 150 // Wait a bit longer and timeout again later. 151 return timeout * 1000000L; // nanoseconds 152 } 153 } catch (RemoteException ex) { 154 } 155 } 156 return 0; // abort dispatching 157 } 158 159 private void addInputWindowHandleLw(final InputWindowHandle windowHandle) { 160 if (mInputWindowHandles == null) { 161 mInputWindowHandles = new InputWindowHandle[16]; 162 } 163 if (mInputWindowHandleCount >= mInputWindowHandles.length) { 164 mInputWindowHandles = Arrays.copyOf(mInputWindowHandles, 165 mInputWindowHandleCount * 2); 166 } 167 mInputWindowHandles[mInputWindowHandleCount++] = windowHandle; 168 } 169 170 private void addInputWindowHandleLw(final InputWindowHandle inputWindowHandle, 171 final WindowState child, int flags, final int type, final boolean isVisible, 172 final boolean hasFocus, final boolean hasWallpaper) { 173 // Add a window to our list of input windows. 174 inputWindowHandle.name = child.toString(); 175 final boolean modal = (flags & (WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL 176 | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE)) == 0; 177 if (modal && child.mAppToken != null) { 178 // Limit the outer touch to the activity stack region. 179 flags |= WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL; 180 child.getStackBounds(mTmpRect); 181 inputWindowHandle.touchableRegion.set(mTmpRect); 182 } else { 183 // Not modal or full screen modal 184 child.getTouchableRegion(inputWindowHandle.touchableRegion); 185 } 186 inputWindowHandle.layoutParamsFlags = flags; 187 inputWindowHandle.layoutParamsType = type; 188 inputWindowHandle.dispatchingTimeoutNanos = child.getInputDispatchingTimeoutNanos(); 189 inputWindowHandle.visible = isVisible; 190 inputWindowHandle.canReceiveKeys = child.canReceiveKeys(); 191 inputWindowHandle.hasFocus = hasFocus; 192 inputWindowHandle.hasWallpaper = hasWallpaper; 193 inputWindowHandle.paused = child.mAppToken != null ? child.mAppToken.paused : false; 194 inputWindowHandle.layer = child.mLayer; 195 inputWindowHandle.ownerPid = child.mSession.mPid; 196 inputWindowHandle.ownerUid = child.mSession.mUid; 197 inputWindowHandle.inputFeatures = child.mAttrs.inputFeatures; 198 199 final Rect frame = child.mFrame; 200 inputWindowHandle.frameLeft = frame.left; 201 inputWindowHandle.frameTop = frame.top; 202 inputWindowHandle.frameRight = frame.right; 203 inputWindowHandle.frameBottom = frame.bottom; 204 205 if (child.mGlobalScale != 1) { 206 // If we are scaling the window, input coordinates need 207 // to be inversely scaled to map from what is on screen 208 // to what is actually being touched in the UI. 209 inputWindowHandle.scaleFactor = 1.0f/child.mGlobalScale; 210 } else { 211 inputWindowHandle.scaleFactor = 1; 212 } 213 214 215 addInputWindowHandleLw(inputWindowHandle); 216 } 217 218 private void clearInputWindowHandlesLw() { 219 while (mInputWindowHandleCount != 0) { 220 mInputWindowHandles[--mInputWindowHandleCount] = null; 221 } 222 } 223 224 public void setUpdateInputWindowsNeededLw() { 225 mUpdateInputWindowsNeeded = true; 226 } 227 228 /* Updates the cached window information provided to the input dispatcher. */ 229 public void updateInputWindowsLw(boolean force) { 230 if (!force && !mUpdateInputWindowsNeeded) { 231 return; 232 } 233 mUpdateInputWindowsNeeded = false; 234 235 if (false) Slog.d(WindowManagerService.TAG, ">>>>>> ENTERED updateInputWindowsLw"); 236 237 // Populate the input window list with information about all of the windows that 238 // could potentially receive input. 239 // As an optimization, we could try to prune the list of windows but this turns 240 // out to be difficult because only the native code knows for sure which window 241 // currently has touch focus. 242 boolean disableWallpaperTouchEvents = false; 243 244 // If there's a drag in flight, provide a pseudowindow to catch drag input 245 final boolean inDrag = (mService.mDragState != null); 246 if (inDrag) { 247 if (WindowManagerService.DEBUG_DRAG) { 248 Log.d(WindowManagerService.TAG, "Inserting drag window"); 249 } 250 final InputWindowHandle dragWindowHandle = mService.mDragState.mDragWindowHandle; 251 if (dragWindowHandle != null) { 252 addInputWindowHandleLw(dragWindowHandle); 253 } else { 254 Slog.w(WindowManagerService.TAG, "Drag is in progress but there is no " 255 + "drag window handle."); 256 } 257 } 258 259 boolean addInputConsumerHandle = mService.mInputConsumer != null; 260 261 // Add all windows on the default display. 262 final int numDisplays = mService.mDisplayContents.size(); 263 for (int displayNdx = 0; displayNdx < numDisplays; ++displayNdx) { 264 WindowList windows = mService.mDisplayContents.valueAt(displayNdx).getWindowList(); 265 for (int winNdx = windows.size() - 1; winNdx >= 0; --winNdx) { 266 final WindowState child = windows.get(winNdx); 267 final InputChannel inputChannel = child.mInputChannel; 268 final InputWindowHandle inputWindowHandle = child.mInputWindowHandle; 269 if (inputChannel == null || inputWindowHandle == null || child.mRemoved) { 270 // Skip this window because it cannot possibly receive input. 271 continue; 272 } 273 if (addInputConsumerHandle 274 && inputWindowHandle.layer <= mService.mInputConsumer.mWindowHandle.layer) { 275 addInputWindowHandleLw(mService.mInputConsumer.mWindowHandle); 276 addInputConsumerHandle = false; 277 } 278 279 final int flags = child.mAttrs.flags; 280 final int privateFlags = child.mAttrs.privateFlags; 281 final int type = child.mAttrs.type; 282 283 final boolean hasFocus = (child == mInputFocus); 284 final boolean isVisible = child.isVisibleLw(); 285 if ((privateFlags 286 & WindowManager.LayoutParams.PRIVATE_FLAG_DISABLE_WALLPAPER_TOUCH_EVENTS) 287 != 0) { 288 disableWallpaperTouchEvents = true; 289 } 290 final boolean hasWallpaper = (child == mService.mWallpaperTarget) 291 && (privateFlags & WindowManager.LayoutParams.PRIVATE_FLAG_KEYGUARD) == 0 292 && !disableWallpaperTouchEvents; 293 final boolean onDefaultDisplay = (child.getDisplayId() == Display.DEFAULT_DISPLAY); 294 295 // If there's a drag in progress and 'child' is a potential drop target, 296 // make sure it's been told about the drag 297 if (inDrag && isVisible && onDefaultDisplay) { 298 mService.mDragState.sendDragStartedIfNeededLw(child); 299 } 300 301 addInputWindowHandleLw(inputWindowHandle, child, flags, type, isVisible, hasFocus, 302 hasWallpaper); 303 } 304 } 305 306 // Send windows to native code. 307 mService.mInputManager.setInputWindows(mInputWindowHandles); 308 309 // Clear the list in preparation for the next round. 310 clearInputWindowHandlesLw(); 311 312 if (false) Slog.d(WindowManagerService.TAG, "<<<<<<< EXITED updateInputWindowsLw"); 313 } 314 315 /* Notifies that the input device configuration has changed. */ 316 @Override 317 public void notifyConfigurationChanged() { 318 mService.sendNewConfiguration(); 319 320 synchronized (mInputDevicesReadyMonitor) { 321 if (!mInputDevicesReady) { 322 mInputDevicesReady = true; 323 mInputDevicesReadyMonitor.notifyAll(); 324 } 325 } 326 } 327 328 /* Waits until the built-in input devices have been configured. */ 329 public boolean waitForInputDevicesReady(long timeoutMillis) { 330 synchronized (mInputDevicesReadyMonitor) { 331 if (!mInputDevicesReady) { 332 try { 333 mInputDevicesReadyMonitor.wait(timeoutMillis); 334 } catch (InterruptedException ex) { 335 } 336 } 337 return mInputDevicesReady; 338 } 339 } 340 341 /* Notifies that the lid switch changed state. */ 342 @Override 343 public void notifyLidSwitchChanged(long whenNanos, boolean lidOpen) { 344 mService.mPolicy.notifyLidSwitchChanged(whenNanos, lidOpen); 345 } 346 347 /* Notifies that the camera lens cover state has changed. */ 348 @Override 349 public void notifyCameraLensCoverSwitchChanged(long whenNanos, boolean lensCovered) { 350 mService.mPolicy.notifyCameraLensCoverSwitchChanged(whenNanos, lensCovered); 351 } 352 353 /* Provides an opportunity for the window manager policy to intercept early key 354 * processing as soon as the key has been read from the device. */ 355 @Override 356 public int interceptKeyBeforeQueueing(KeyEvent event, int policyFlags) { 357 return mService.mPolicy.interceptKeyBeforeQueueing(event, policyFlags); 358 } 359 360 /* Provides an opportunity for the window manager policy to intercept early motion event 361 * processing when the device is in a non-interactive state since these events are normally 362 * dropped. */ 363 @Override 364 public int interceptMotionBeforeQueueingNonInteractive(long whenNanos, int policyFlags) { 365 return mService.mPolicy.interceptMotionBeforeQueueingNonInteractive( 366 whenNanos, policyFlags); 367 } 368 369 /* Provides an opportunity for the window manager policy to process a key before 370 * ordinary dispatch. */ 371 @Override 372 public long interceptKeyBeforeDispatching( 373 InputWindowHandle focus, KeyEvent event, int policyFlags) { 374 WindowState windowState = focus != null ? (WindowState) focus.windowState : null; 375 return mService.mPolicy.interceptKeyBeforeDispatching(windowState, event, policyFlags); 376 } 377 378 /* Provides an opportunity for the window manager policy to process a key that 379 * the application did not handle. */ 380 @Override 381 public KeyEvent dispatchUnhandledKey( 382 InputWindowHandle focus, KeyEvent event, int policyFlags) { 383 WindowState windowState = focus != null ? (WindowState) focus.windowState : null; 384 return mService.mPolicy.dispatchUnhandledKey(windowState, event, policyFlags); 385 } 386 387 /* Callback to get pointer layer. */ 388 @Override 389 public int getPointerLayer() { 390 return mService.mPolicy.windowTypeToLayerLw(WindowManager.LayoutParams.TYPE_POINTER) 391 * WindowManagerService.TYPE_LAYER_MULTIPLIER 392 + WindowManagerService.TYPE_LAYER_OFFSET; 393 } 394 395 /* Called when the current input focus changes. 396 * Layer assignment is assumed to be complete by the time this is called. 397 */ 398 public void setInputFocusLw(WindowState newWindow, boolean updateInputWindows) { 399 if (WindowManagerService.DEBUG_FOCUS_LIGHT || WindowManagerService.DEBUG_INPUT) { 400 Slog.d(WindowManagerService.TAG, "Input focus has changed to " + newWindow); 401 } 402 403 if (newWindow != mInputFocus) { 404 if (newWindow != null && newWindow.canReceiveKeys()) { 405 // Displaying a window implicitly causes dispatching to be unpaused. 406 // This is to protect against bugs if someone pauses dispatching but 407 // forgets to resume. 408 newWindow.mToken.paused = false; 409 } 410 411 mInputFocus = newWindow; 412 setUpdateInputWindowsNeededLw(); 413 414 if (updateInputWindows) { 415 updateInputWindowsLw(false /*force*/); 416 } 417 } 418 } 419 420 public void setFocusedAppLw(AppWindowToken newApp) { 421 // Focused app has changed. 422 if (newApp == null) { 423 mService.mInputManager.setFocusedApplication(null); 424 } else { 425 final InputApplicationHandle handle = newApp.mInputApplicationHandle; 426 handle.name = newApp.toString(); 427 handle.dispatchingTimeoutNanos = newApp.inputDispatchingTimeoutNanos; 428 429 mService.mInputManager.setFocusedApplication(handle); 430 } 431 } 432 433 public void pauseDispatchingLw(WindowToken window) { 434 if (! window.paused) { 435 if (WindowManagerService.DEBUG_INPUT) { 436 Slog.v(WindowManagerService.TAG, "Pausing WindowToken " + window); 437 } 438 439 window.paused = true; 440 updateInputWindowsLw(true /*force*/); 441 } 442 } 443 444 public void resumeDispatchingLw(WindowToken window) { 445 if (window.paused) { 446 if (WindowManagerService.DEBUG_INPUT) { 447 Slog.v(WindowManagerService.TAG, "Resuming WindowToken " + window); 448 } 449 450 window.paused = false; 451 updateInputWindowsLw(true /*force*/); 452 } 453 } 454 455 public void freezeInputDispatchingLw() { 456 if (! mInputDispatchFrozen) { 457 if (WindowManagerService.DEBUG_INPUT) { 458 Slog.v(WindowManagerService.TAG, "Freezing input dispatching"); 459 } 460 461 mInputDispatchFrozen = true; 462 updateInputDispatchModeLw(); 463 } 464 } 465 466 public void thawInputDispatchingLw() { 467 if (mInputDispatchFrozen) { 468 if (WindowManagerService.DEBUG_INPUT) { 469 Slog.v(WindowManagerService.TAG, "Thawing input dispatching"); 470 } 471 472 mInputDispatchFrozen = false; 473 updateInputDispatchModeLw(); 474 } 475 } 476 477 public void setEventDispatchingLw(boolean enabled) { 478 if (mInputDispatchEnabled != enabled) { 479 if (WindowManagerService.DEBUG_INPUT) { 480 Slog.v(WindowManagerService.TAG, "Setting event dispatching to " + enabled); 481 } 482 483 mInputDispatchEnabled = enabled; 484 updateInputDispatchModeLw(); 485 } 486 } 487 488 private void updateInputDispatchModeLw() { 489 mService.mInputManager.setInputDispatchMode(mInputDispatchEnabled, mInputDispatchFrozen); 490 } 491 } 492