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 17package com.android.server.wm; 18 19import com.android.server.input.InputManagerService; 20import com.android.server.input.InputApplicationHandle; 21import com.android.server.input.InputWindowHandle; 22 23import android.graphics.Rect; 24import android.os.RemoteException; 25import android.util.Log; 26import android.util.Slog; 27import android.view.InputChannel; 28import android.view.KeyEvent; 29import android.view.WindowManager; 30 31import java.util.ArrayList; 32import java.util.Arrays; 33 34final class InputMonitor implements InputManagerService.Callbacks { 35 private final WindowManagerService mService; 36 37 // Current window with input focus for keys and other non-touch events. May be null. 38 private WindowState mInputFocus; 39 40 // When true, prevents input dispatch from proceeding until set to false again. 41 private boolean mInputDispatchFrozen; 42 43 // When true, input dispatch proceeds normally. Otherwise all events are dropped. 44 // Initially false, so that input does not get dispatched until boot is finished at 45 // which point the ActivityManager will enable dispatching. 46 private boolean mInputDispatchEnabled; 47 48 // When true, need to call updateInputWindowsLw(). 49 private boolean mUpdateInputWindowsNeeded = true; 50 51 // Array of window handles to provide to the input dispatcher. 52 private InputWindowHandle[] mInputWindowHandles; 53 private int mInputWindowHandleCount; 54 55 // Set to true when the first input device configuration change notification 56 // is received to indicate that the input devices are ready. 57 private final Object mInputDevicesReadyMonitor = new Object(); 58 private boolean mInputDevicesReady; 59 60 public InputMonitor(WindowManagerService service) { 61 mService = service; 62 } 63 64 /* Notifies the window manager about a broken input channel. 65 * 66 * Called by the InputManager. 67 */ 68 public void notifyInputChannelBroken(InputWindowHandle inputWindowHandle) { 69 if (inputWindowHandle == null) { 70 return; 71 } 72 73 synchronized (mService.mWindowMap) { 74 WindowState windowState = (WindowState) inputWindowHandle.windowState; 75 if (windowState != null) { 76 Slog.i(WindowManagerService.TAG, "WINDOW DIED " + windowState); 77 mService.removeWindowLocked(windowState.mSession, windowState); 78 } 79 } 80 } 81 82 /* Notifies the window manager about an application that is not responding. 83 * Returns a new timeout to continue waiting in nanoseconds, or 0 to abort dispatch. 84 * 85 * Called by the InputManager. 86 */ 87 public long notifyANR(InputApplicationHandle inputApplicationHandle, 88 InputWindowHandle inputWindowHandle) { 89 AppWindowToken appWindowToken = null; 90 synchronized (mService.mWindowMap) { 91 WindowState windowState = null; 92 if (inputWindowHandle != null) { 93 windowState = (WindowState) inputWindowHandle.windowState; 94 if (windowState != null) { 95 appWindowToken = windowState.mAppToken; 96 } 97 } 98 if (appWindowToken == null && inputApplicationHandle != null) { 99 appWindowToken = (AppWindowToken)inputApplicationHandle.appWindowToken; 100 } 101 102 if (windowState != null) { 103 Slog.i(WindowManagerService.TAG, "Input event dispatching timed out " 104 + "sending to " + windowState.mAttrs.getTitle()); 105 } else if (appWindowToken != null) { 106 Slog.i(WindowManagerService.TAG, "Input event dispatching timed out " 107 + "sending to application " + appWindowToken.stringName); 108 } else { 109 Slog.i(WindowManagerService.TAG, "Input event dispatching timed out."); 110 } 111 112 mService.saveANRStateLocked(appWindowToken, windowState); 113 } 114 115 if (appWindowToken != null && appWindowToken.appToken != null) { 116 try { 117 // Notify the activity manager about the timeout and let it decide whether 118 // to abort dispatching or keep waiting. 119 boolean abort = appWindowToken.appToken.keyDispatchingTimedOut(); 120 if (! abort) { 121 // The activity manager declined to abort dispatching. 122 // Wait a bit longer and timeout again later. 123 return appWindowToken.inputDispatchingTimeoutNanos; 124 } 125 } catch (RemoteException ex) { 126 } 127 } 128 return 0; // abort dispatching 129 } 130 131 private void addInputWindowHandleLw(InputWindowHandle windowHandle) { 132 if (mInputWindowHandles == null) { 133 mInputWindowHandles = new InputWindowHandle[16]; 134 } 135 if (mInputWindowHandleCount >= mInputWindowHandles.length) { 136 mInputWindowHandles = Arrays.copyOf(mInputWindowHandles, 137 mInputWindowHandleCount * 2); 138 } 139 mInputWindowHandles[mInputWindowHandleCount++] = windowHandle; 140 } 141 142 private void clearInputWindowHandlesLw() { 143 while (mInputWindowHandleCount != 0) { 144 mInputWindowHandles[--mInputWindowHandleCount] = null; 145 } 146 } 147 148 public void setUpdateInputWindowsNeededLw() { 149 mUpdateInputWindowsNeeded = true; 150 } 151 152 /* Updates the cached window information provided to the input dispatcher. */ 153 public void updateInputWindowsLw(boolean force) { 154 if (!force && !mUpdateInputWindowsNeeded) { 155 return; 156 } 157 mUpdateInputWindowsNeeded = false; 158 159 if (false) Slog.d(WindowManagerService.TAG, ">>>>>> ENTERED updateInputWindowsLw"); 160 161 // Populate the input window list with information about all of the windows that 162 // could potentially receive input. 163 // As an optimization, we could try to prune the list of windows but this turns 164 // out to be difficult because only the native code knows for sure which window 165 // currently has touch focus. 166 final ArrayList<WindowState> windows = mService.mWindows; 167 168 // If there's a drag in flight, provide a pseudowindow to catch drag input 169 final boolean inDrag = (mService.mDragState != null); 170 if (inDrag) { 171 if (WindowManagerService.DEBUG_DRAG) { 172 Log.d(WindowManagerService.TAG, "Inserting drag window"); 173 } 174 final InputWindowHandle dragWindowHandle = mService.mDragState.mDragWindowHandle; 175 if (dragWindowHandle != null) { 176 addInputWindowHandleLw(dragWindowHandle); 177 } else { 178 Slog.w(WindowManagerService.TAG, "Drag is in progress but there is no " 179 + "drag window handle."); 180 } 181 } 182 183 final int NFW = mService.mFakeWindows.size(); 184 for (int i = 0; i < NFW; i++) { 185 addInputWindowHandleLw(mService.mFakeWindows.get(i).mWindowHandle); 186 } 187 188 final int N = windows.size(); 189 for (int i = N - 1; i >= 0; i--) { 190 final WindowState child = windows.get(i); 191 final InputChannel inputChannel = child.mInputChannel; 192 final InputWindowHandle inputWindowHandle = child.mInputWindowHandle; 193 if (inputChannel == null || inputWindowHandle == null || child.mRemoved) { 194 // Skip this window because it cannot possibly receive input. 195 continue; 196 } 197 198 final int flags = child.mAttrs.flags; 199 final int type = child.mAttrs.type; 200 201 final boolean hasFocus = (child == mInputFocus); 202 final boolean isVisible = child.isVisibleLw(); 203 final boolean hasWallpaper = (child == mService.mWallpaperTarget) 204 && (type != WindowManager.LayoutParams.TYPE_KEYGUARD); 205 206 // If there's a drag in progress and 'child' is a potential drop target, 207 // make sure it's been told about the drag 208 if (inDrag && isVisible) { 209 mService.mDragState.sendDragStartedIfNeededLw(child); 210 } 211 212 // Add a window to our list of input windows. 213 inputWindowHandle.name = child.toString(); 214 inputWindowHandle.layoutParamsFlags = flags; 215 inputWindowHandle.layoutParamsType = type; 216 inputWindowHandle.dispatchingTimeoutNanos = child.getInputDispatchingTimeoutNanos(); 217 inputWindowHandle.visible = isVisible; 218 inputWindowHandle.canReceiveKeys = child.canReceiveKeys(); 219 inputWindowHandle.hasFocus = hasFocus; 220 inputWindowHandle.hasWallpaper = hasWallpaper; 221 inputWindowHandle.paused = child.mAppToken != null ? child.mAppToken.paused : false; 222 inputWindowHandle.layer = child.mLayer; 223 inputWindowHandle.ownerPid = child.mSession.mPid; 224 inputWindowHandle.ownerUid = child.mSession.mUid; 225 inputWindowHandle.inputFeatures = child.mAttrs.inputFeatures; 226 227 final Rect frame = child.mFrame; 228 inputWindowHandle.frameLeft = frame.left; 229 inputWindowHandle.frameTop = frame.top; 230 inputWindowHandle.frameRight = frame.right; 231 inputWindowHandle.frameBottom = frame.bottom; 232 233 if (child.mGlobalScale != 1) { 234 // If we are scaling the window, input coordinates need 235 // to be inversely scaled to map from what is on screen 236 // to what is actually being touched in the UI. 237 inputWindowHandle.scaleFactor = 1.0f/child.mGlobalScale; 238 } else { 239 inputWindowHandle.scaleFactor = 1; 240 } 241 242 child.getTouchableRegion(inputWindowHandle.touchableRegion); 243 244 addInputWindowHandleLw(inputWindowHandle); 245 } 246 247 // Send windows to native code. 248 mService.mInputManager.setInputWindows(mInputWindowHandles); 249 250 // Clear the list in preparation for the next round. 251 clearInputWindowHandlesLw(); 252 253 if (false) Slog.d(WindowManagerService.TAG, "<<<<<<< EXITED updateInputWindowsLw"); 254 } 255 256 /* Notifies that the input device configuration has changed. */ 257 public void notifyConfigurationChanged() { 258 mService.sendNewConfiguration(); 259 260 synchronized (mInputDevicesReadyMonitor) { 261 if (!mInputDevicesReady) { 262 mInputDevicesReady = true; 263 mInputDevicesReadyMonitor.notifyAll(); 264 } 265 } 266 } 267 268 /* Waits until the built-in input devices have been configured. */ 269 public boolean waitForInputDevicesReady(long timeoutMillis) { 270 synchronized (mInputDevicesReadyMonitor) { 271 if (!mInputDevicesReady) { 272 try { 273 mInputDevicesReadyMonitor.wait(timeoutMillis); 274 } catch (InterruptedException ex) { 275 } 276 } 277 return mInputDevicesReady; 278 } 279 } 280 281 /* Notifies that the lid switch changed state. */ 282 public void notifyLidSwitchChanged(long whenNanos, boolean lidOpen) { 283 mService.mPolicy.notifyLidSwitchChanged(whenNanos, lidOpen); 284 } 285 286 /* Provides an opportunity for the window manager policy to intercept early key 287 * processing as soon as the key has been read from the device. */ 288 public int interceptKeyBeforeQueueing( 289 KeyEvent event, int policyFlags, boolean isScreenOn) { 290 return mService.mPolicy.interceptKeyBeforeQueueing(event, policyFlags, isScreenOn); 291 } 292 293 /* Provides an opportunity for the window manager policy to intercept early 294 * motion event processing when the screen is off since these events are normally 295 * dropped. */ 296 public int interceptMotionBeforeQueueingWhenScreenOff(int policyFlags) { 297 return mService.mPolicy.interceptMotionBeforeQueueingWhenScreenOff(policyFlags); 298 } 299 300 /* Provides an opportunity for the window manager policy to process a key before 301 * ordinary dispatch. */ 302 public long interceptKeyBeforeDispatching( 303 InputWindowHandle focus, KeyEvent event, int policyFlags) { 304 WindowState windowState = focus != null ? (WindowState) focus.windowState : null; 305 return mService.mPolicy.interceptKeyBeforeDispatching(windowState, event, policyFlags); 306 } 307 308 /* Provides an opportunity for the window manager policy to process a key that 309 * the application did not handle. */ 310 public KeyEvent dispatchUnhandledKey( 311 InputWindowHandle focus, KeyEvent event, int policyFlags) { 312 WindowState windowState = focus != null ? (WindowState) focus.windowState : null; 313 return mService.mPolicy.dispatchUnhandledKey(windowState, event, policyFlags); 314 } 315 316 /* Callback to get pointer layer. */ 317 public int getPointerLayer() { 318 return mService.mPolicy.windowTypeToLayerLw(WindowManager.LayoutParams.TYPE_POINTER) 319 * WindowManagerService.TYPE_LAYER_MULTIPLIER 320 + WindowManagerService.TYPE_LAYER_OFFSET; 321 } 322 323 /* Called when the current input focus changes. 324 * Layer assignment is assumed to be complete by the time this is called. 325 */ 326 public void setInputFocusLw(WindowState newWindow, boolean updateInputWindows) { 327 if (WindowManagerService.DEBUG_INPUT) { 328 Slog.d(WindowManagerService.TAG, "Input focus has changed to " + newWindow); 329 } 330 331 if (newWindow != mInputFocus) { 332 if (newWindow != null && newWindow.canReceiveKeys()) { 333 // Displaying a window implicitly causes dispatching to be unpaused. 334 // This is to protect against bugs if someone pauses dispatching but 335 // forgets to resume. 336 newWindow.mToken.paused = false; 337 } 338 339 mInputFocus = newWindow; 340 setUpdateInputWindowsNeededLw(); 341 342 if (updateInputWindows) { 343 updateInputWindowsLw(false /*force*/); 344 } 345 } 346 } 347 348 public void setFocusedAppLw(AppWindowToken newApp) { 349 // Focused app has changed. 350 if (newApp == null) { 351 mService.mInputManager.setFocusedApplication(null); 352 } else { 353 final InputApplicationHandle handle = newApp.mInputApplicationHandle; 354 handle.name = newApp.toString(); 355 handle.dispatchingTimeoutNanos = newApp.inputDispatchingTimeoutNanos; 356 357 mService.mInputManager.setFocusedApplication(handle); 358 } 359 } 360 361 public void pauseDispatchingLw(WindowToken window) { 362 if (! window.paused) { 363 if (WindowManagerService.DEBUG_INPUT) { 364 Slog.v(WindowManagerService.TAG, "Pausing WindowToken " + window); 365 } 366 367 window.paused = true; 368 updateInputWindowsLw(true /*force*/); 369 } 370 } 371 372 public void resumeDispatchingLw(WindowToken window) { 373 if (window.paused) { 374 if (WindowManagerService.DEBUG_INPUT) { 375 Slog.v(WindowManagerService.TAG, "Resuming WindowToken " + window); 376 } 377 378 window.paused = false; 379 updateInputWindowsLw(true /*force*/); 380 } 381 } 382 383 public void freezeInputDispatchingLw() { 384 if (! mInputDispatchFrozen) { 385 if (WindowManagerService.DEBUG_INPUT) { 386 Slog.v(WindowManagerService.TAG, "Freezing input dispatching"); 387 } 388 389 mInputDispatchFrozen = true; 390 updateInputDispatchModeLw(); 391 } 392 } 393 394 public void thawInputDispatchingLw() { 395 if (mInputDispatchFrozen) { 396 if (WindowManagerService.DEBUG_INPUT) { 397 Slog.v(WindowManagerService.TAG, "Thawing input dispatching"); 398 } 399 400 mInputDispatchFrozen = false; 401 updateInputDispatchModeLw(); 402 } 403 } 404 405 public void setEventDispatchingLw(boolean enabled) { 406 if (mInputDispatchEnabled != enabled) { 407 if (WindowManagerService.DEBUG_INPUT) { 408 Slog.v(WindowManagerService.TAG, "Setting event dispatching to " + enabled); 409 } 410 411 mInputDispatchEnabled = enabled; 412 updateInputDispatchModeLw(); 413 } 414 } 415 416 private void updateInputDispatchModeLw() { 417 mService.mInputManager.setInputDispatchMode(mInputDispatchEnabled, mInputDispatchFrozen); 418 } 419} 420