services/java/com/android/server/wm/InputMonitor.java - platform/frameworks/base - Git at Google

 /*
  * Copyright (C) 2010 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package com.android.server.wm;

 import com.android.server.input.InputManagerService;
 import com.android.server.input.InputApplicationHandle;
 import com.android.server.input.InputWindowHandle;

 import android.app.ActivityManagerNative;
 import android.graphics.Rect;
 import android.os.RemoteException;
 import android.util.Log;
 import android.util.Slog;
 import android.view.Display;
 import android.view.InputChannel;
 import android.view.KeyEvent;
 import android.view.WindowManager;

 import java.util.Arrays;

 final class InputMonitor implements InputManagerService.WindowManagerCallbacks {
     private final WindowManagerService mService;

     // Current window with input focus for keys and other non-touch events.  May be null.
     private WindowState mInputFocus;

     // When true, prevents input dispatch from proceeding until set to false again.
     private boolean mInputDispatchFrozen;

     // When true, input dispatch proceeds normally.  Otherwise all events are dropped.
     // Initially false, so that input does not get dispatched until boot is finished at
     // which point the ActivityManager will enable dispatching.
     private boolean mInputDispatchEnabled;

     // When true, need to call updateInputWindowsLw().
     private boolean mUpdateInputWindowsNeeded = true;

     // Array of window handles to provide to the input dispatcher.
     private InputWindowHandle[] mInputWindowHandles;
     private int mInputWindowHandleCount;

     // Set to true when the first input device configuration change notification
     // is received to indicate that the input devices are ready.
     private final Object mInputDevicesReadyMonitor = new Object();
     private boolean mInputDevicesReady;

     public InputMonitor(WindowManagerService service) {
         mService = service;
     }

     /* Notifies the window manager about a broken input channel.
      *
      * Called by the InputManager.
      */
     public void notifyInputChannelBroken(InputWindowHandle inputWindowHandle) {
         if (inputWindowHandle == null) {
             return;
         }

         synchronized (mService.mWindowMap) {
             WindowState windowState = (WindowState) inputWindowHandle.windowState;
             if (windowState != null) {
                 Slog.i(WindowManagerService.TAG, "WINDOW DIED " + windowState);
                 mService.removeWindowLocked(windowState.mSession, windowState);
             }
         }
     }

     /* Notifies the window manager about an application that is not responding.
      * Returns a new timeout to continue waiting in nanoseconds, or 0 to abort dispatch.
      *
      * Called by the InputManager.
      */
     public long notifyANR(InputApplicationHandle inputApplicationHandle,
             InputWindowHandle inputWindowHandle) {
         AppWindowToken appWindowToken = null;
         WindowState windowState = null;
         boolean aboveSystem = false;
         synchronized (mService.mWindowMap) {
             if (inputWindowHandle != null) {
                 windowState = (WindowState) inputWindowHandle.windowState;
                 if (windowState != null) {
                     appWindowToken = windowState.mAppToken;
                 }
             }
             if (appWindowToken == null && inputApplicationHandle != null) {
                 appWindowToken = (AppWindowToken)inputApplicationHandle.appWindowToken;
             }

             if (windowState != null) {
                 Slog.i(WindowManagerService.TAG, "Input event dispatching timed out "
                         + "sending to " + windowState.mAttrs.getTitle());
                 // Figure out whether this window is layered above system windows.
                 // We need to do this here to help the activity manager know how to
                 // layer its ANR dialog.
                 int systemAlertLayer = mService.mPolicy.windowTypeToLayerLw(
                         WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
                 aboveSystem = windowState.mBaseLayer > systemAlertLayer;
             } else if (appWindowToken != null) {
                 Slog.i(WindowManagerService.TAG, "Input event dispatching timed out "
                         + "sending to application " + appWindowToken.stringName);
             } else {
                 Slog.i(WindowManagerService.TAG, "Input event dispatching timed out.");
             }

             mService.saveANRStateLocked(appWindowToken, windowState);
         }

         if (appWindowToken != null && appWindowToken.appToken != null) {
             try {
                 // Notify the activity manager about the timeout and let it decide whether
                 // to abort dispatching or keep waiting.
                 boolean abort = appWindowToken.appToken.keyDispatchingTimedOut();
                 if (! abort) {
                     // The activity manager declined to abort dispatching.
                     // Wait a bit longer and timeout again later.
                     return appWindowToken.inputDispatchingTimeoutNanos;
                 }
             } catch (RemoteException ex) {
             }
         } else if (windowState != null) {
             try {
                 // Notify the activity manager about the timeout and let it decide whether
                 // to abort dispatching or keep waiting.
                 long timeout = ActivityManagerNative.getDefault().inputDispatchingTimedOut(
                         windowState.mSession.mPid, aboveSystem);
                 if (timeout >= 0) {
                     // The activity manager declined to abort dispatching.
                     // Wait a bit longer and timeout again later.
                     return timeout;
                 }
             } catch (RemoteException ex) {
             }
         }
         return 0; // abort dispatching
     }

     private void addInputWindowHandleLw(final InputWindowHandle windowHandle) {
         if (mInputWindowHandles == null) {
             mInputWindowHandles = new InputWindowHandle[16];
         }
         if (mInputWindowHandleCount >= mInputWindowHandles.length) {
             mInputWindowHandles = Arrays.copyOf(mInputWindowHandles,
                     mInputWindowHandleCount * 2);
         }
         mInputWindowHandles[mInputWindowHandleCount++] = windowHandle;
     }

     private void addInputWindowHandleLw(final InputWindowHandle inputWindowHandle,
             final WindowState child, final int flags, final int type,
             final boolean isVisible, final boolean hasFocus, final boolean hasWallpaper) {
         // Add a window to our list of input windows.
         inputWindowHandle.name = child.toString();
         inputWindowHandle.layoutParamsFlags = flags;
         inputWindowHandle.layoutParamsType = type;
         inputWindowHandle.dispatchingTimeoutNanos = child.getInputDispatchingTimeoutNanos();
         inputWindowHandle.visible = isVisible;
         inputWindowHandle.canReceiveKeys = child.canReceiveKeys();
         inputWindowHandle.hasFocus = hasFocus;
         inputWindowHandle.hasWallpaper = hasWallpaper;
         inputWindowHandle.paused = child.mAppToken != null ? child.mAppToken.paused : false;
         inputWindowHandle.layer = child.mLayer;
         inputWindowHandle.ownerPid = child.mSession.mPid;
         inputWindowHandle.ownerUid = child.mSession.mUid;
         inputWindowHandle.inputFeatures = child.mAttrs.inputFeatures;

         final Rect frame = child.mFrame;
         inputWindowHandle.frameLeft = frame.left;
         inputWindowHandle.frameTop = frame.top;
         inputWindowHandle.frameRight = frame.right;
         inputWindowHandle.frameBottom = frame.bottom;

         if (child.mGlobalScale != 1) {
             // If we are scaling the window, input coordinates need
             // to be inversely scaled to map from what is on screen
             // to what is actually being touched in the UI.
             inputWindowHandle.scaleFactor = 1.0f/child.mGlobalScale;
         } else {
             inputWindowHandle.scaleFactor = 1;
         }

         child.getTouchableRegion(inputWindowHandle.touchableRegion);

         addInputWindowHandleLw(inputWindowHandle);
     }

     private void clearInputWindowHandlesLw() {
         while (mInputWindowHandleCount != 0) {
             mInputWindowHandles[--mInputWindowHandleCount] = null;
         }
     }

     public void setUpdateInputWindowsNeededLw() {
         mUpdateInputWindowsNeeded = true;
     }

     /* Updates the cached window information provided to the input dispatcher. */
     public void updateInputWindowsLw(boolean force) {
         if (!force && !mUpdateInputWindowsNeeded) {
             return;
         }
         mUpdateInputWindowsNeeded = false;

         if (false) Slog.d(WindowManagerService.TAG, ">>>>>> ENTERED updateInputWindowsLw");

         // Populate the input window list with information about all of the windows that
         // could potentially receive input.
         // As an optimization, we could try to prune the list of windows but this turns
         // out to be difficult because only the native code knows for sure which window
         // currently has touch focus.
         final WindowStateAnimator universeBackground = mService.mAnimator.mUniverseBackground;
         final int aboveUniverseLayer = mService.mAnimator.mAboveUniverseLayer;
         boolean addedUniverse = false;

         // If there's a drag in flight, provide a pseudowindow to catch drag input
         final boolean inDrag = (mService.mDragState != null);
         if (inDrag) {
             if (WindowManagerService.DEBUG_DRAG) {
                 Log.d(WindowManagerService.TAG, "Inserting drag window");
             }
             final InputWindowHandle dragWindowHandle = mService.mDragState.mDragWindowHandle;
             if (dragWindowHandle != null) {
                 addInputWindowHandleLw(dragWindowHandle);
             } else {
                 Slog.w(WindowManagerService.TAG, "Drag is in progress but there is no "
                         + "drag window handle.");
             }
         }

         final int NFW = mService.mFakeWindows.size();
         for (int i = 0; i < NFW; i++) {
             addInputWindowHandleLw(mService.mFakeWindows.get(i).mWindowHandle);
         }

         // Add all windows on the default display.
         final int numDisplays = mService.mDisplayContents.size();
         for (int displayNdx = 0; displayNdx < numDisplays; ++displayNdx) {
             final WindowList windows =
                     mService.mDisplayContents.valueAt(displayNdx).getWindowList();
             for (int winNdx = windows.size() - 1; winNdx >= 0; --winNdx) {
                 final WindowState child = windows.get(winNdx);
                 final InputChannel inputChannel = child.mInputChannel;
                 final InputWindowHandle inputWindowHandle = child.mInputWindowHandle;
                 if (inputChannel == null || inputWindowHandle == null || child.mRemoved) {
                     // Skip this window because it cannot possibly receive input.
                     continue;
                 }

                 final int flags = child.mAttrs.flags;
                 final int type = child.mAttrs.type;

                 final boolean hasFocus = (child == mInputFocus);
                 final boolean isVisible = child.isVisibleLw();
                 final boolean hasWallpaper = (child == mService.mWallpaperTarget)
                         && (type != WindowManager.LayoutParams.TYPE_KEYGUARD);
                 final boolean onDefaultDisplay = (child.getDisplayId() == Display.DEFAULT_DISPLAY);

                 // If there's a drag in progress and 'child' is a potential drop target,
                 // make sure it's been told about the drag
                 if (inDrag && isVisible && onDefaultDisplay) {
                     mService.mDragState.sendDragStartedIfNeededLw(child);
                 }

                 if (universeBackground != null && !addedUniverse
                         && child.mBaseLayer < aboveUniverseLayer && onDefaultDisplay) {
                     final WindowState u = universeBackground.mWin;
                     if (u.mInputChannel != null && u.mInputWindowHandle != null) {
                         addInputWindowHandleLw(u.mInputWindowHandle, u, u.mAttrs.flags,
                                 u.mAttrs.type, true, u == mInputFocus, false);
                     }
                     addedUniverse = true;
                 }

                 if (child.mWinAnimator != universeBackground) {
                     addInputWindowHandleLw(inputWindowHandle, child, flags, type,
                             isVisible, hasFocus, hasWallpaper);
                 }
             }
         }

         // Send windows to native code.
         mService.mInputManager.setInputWindows(mInputWindowHandles);

         // Clear the list in preparation for the next round.
         clearInputWindowHandlesLw();

         if (false) Slog.d(WindowManagerService.TAG, "<<<<<<< EXITED updateInputWindowsLw");
     }

     /* Notifies that the input device configuration has changed. */
     public void notifyConfigurationChanged() {
         mService.sendNewConfiguration();

         synchronized (mInputDevicesReadyMonitor) {
             if (!mInputDevicesReady) {
                 mInputDevicesReady = true;
                 mInputDevicesReadyMonitor.notifyAll();
             }
         }
     }

     /* Waits until the built-in input devices have been configured. */
     public boolean waitForInputDevicesReady(long timeoutMillis) {
         synchronized (mInputDevicesReadyMonitor) {
             if (!mInputDevicesReady) {
                 try {
                     mInputDevicesReadyMonitor.wait(timeoutMillis);
                 } catch (InterruptedException ex) {
                 }
             }
             return mInputDevicesReady;
         }
     }

     /* Notifies that the lid switch changed state. */
     public void notifyLidSwitchChanged(long whenNanos, boolean lidOpen) {
         mService.mPolicy.notifyLidSwitchChanged(whenNanos, lidOpen);
     }

     /* Provides an opportunity for the window manager policy to intercept early key
      * processing as soon as the key has been read from the device. */
     public int interceptKeyBeforeQueueing(
             KeyEvent event, int policyFlags, boolean isScreenOn) {
         return mService.mPolicy.interceptKeyBeforeQueueing(event, policyFlags, isScreenOn);
     }

     /* Provides an opportunity for the window manager policy to intercept early
      * motion event processing when the screen is off since these events are normally
      * dropped. */
     public int interceptMotionBeforeQueueingWhenScreenOff(int policyFlags) {
         return mService.mPolicy.interceptMotionBeforeQueueingWhenScreenOff(policyFlags);
     }

     /* Provides an opportunity for the window manager policy to process a key before
      * ordinary dispatch. */
     public long interceptKeyBeforeDispatching(
             InputWindowHandle focus, KeyEvent event, int policyFlags) {
         WindowState windowState = focus != null ? (WindowState) focus.windowState : null;
         return mService.mPolicy.interceptKeyBeforeDispatching(windowState, event, policyFlags);
     }

     /* Provides an opportunity for the window manager policy to process a key that
      * the application did not handle. */
     public KeyEvent dispatchUnhandledKey(
             InputWindowHandle focus, KeyEvent event, int policyFlags) {
         WindowState windowState = focus != null ? (WindowState) focus.windowState : null;
         return mService.mPolicy.dispatchUnhandledKey(windowState, event, policyFlags);
     }

     /* Callback to get pointer layer. */
     public int getPointerLayer() {
         return mService.mPolicy.windowTypeToLayerLw(WindowManager.LayoutParams.TYPE_POINTER)
                 * WindowManagerService.TYPE_LAYER_MULTIPLIER
                 + WindowManagerService.TYPE_LAYER_OFFSET;
     }

     /* Called when the current input focus changes.
      * Layer assignment is assumed to be complete by the time this is called.
      */
     public void setInputFocusLw(WindowState newWindow, boolean updateInputWindows) {
         if (WindowManagerService.DEBUG_INPUT) {
             Slog.d(WindowManagerService.TAG, "Input focus has changed to " + newWindow);
         }

         if (newWindow != mInputFocus) {
             if (newWindow != null && newWindow.canReceiveKeys()) {
                 // Displaying a window implicitly causes dispatching to be unpaused.
                 // This is to protect against bugs if someone pauses dispatching but
                 // forgets to resume.
                 newWindow.mToken.paused = false;
             }

             mInputFocus = newWindow;
             setUpdateInputWindowsNeededLw();

             if (updateInputWindows) {
                 updateInputWindowsLw(false /*force*/);
             }
         }
     }

     public void setFocusedAppLw(AppWindowToken newApp) {
         // Focused app has changed.
         if (newApp == null) {
             mService.mInputManager.setFocusedApplication(null);
         } else {
             final InputApplicationHandle handle = newApp.mInputApplicationHandle;
             handle.name = newApp.toString();
             handle.dispatchingTimeoutNanos = newApp.inputDispatchingTimeoutNanos;

             mService.mInputManager.setFocusedApplication(handle);
         }
     }

     public void pauseDispatchingLw(WindowToken window) {
         if (! window.paused) {
             if (WindowManagerService.DEBUG_INPUT) {
                 Slog.v(WindowManagerService.TAG, "Pausing WindowToken " + window);
             }

             window.paused = true;
             updateInputWindowsLw(true /*force*/);
         }
     }

     public void resumeDispatchingLw(WindowToken window) {
         if (window.paused) {
             if (WindowManagerService.DEBUG_INPUT) {
                 Slog.v(WindowManagerService.TAG, "Resuming WindowToken " + window);
             }

             window.paused = false;
             updateInputWindowsLw(true /*force*/);
         }
     }

     public void freezeInputDispatchingLw() {
         if (! mInputDispatchFrozen) {
             if (WindowManagerService.DEBUG_INPUT) {
                 Slog.v(WindowManagerService.TAG, "Freezing input dispatching");
             }

             mInputDispatchFrozen = true;
             updateInputDispatchModeLw();
         }
     }

     public void thawInputDispatchingLw() {
         if (mInputDispatchFrozen) {
             if (WindowManagerService.DEBUG_INPUT) {
                 Slog.v(WindowManagerService.TAG, "Thawing input dispatching");
             }

             mInputDispatchFrozen = false;
             updateInputDispatchModeLw();
         }
     }

     public void setEventDispatchingLw(boolean enabled) {
         if (mInputDispatchEnabled != enabled) {
             if (WindowManagerService.DEBUG_INPUT) {
                 Slog.v(WindowManagerService.TAG, "Setting event dispatching to " + enabled);
             }

             mInputDispatchEnabled = enabled;
             updateInputDispatchModeLw();
         }
     }

     private void updateInputDispatchModeLw() {
         mService.mInputManager.setInputDispatchMode(mInputDispatchEnabled, mInputDispatchFrozen);
     }
 }
	/*
	* Copyright (C) 2010 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package com.android.server.wm;

	import com.android.server.input.InputManagerService;
	import com.android.server.input.InputApplicationHandle;
	import com.android.server.input.InputWindowHandle;

	import android.app.ActivityManagerNative;
	import android.graphics.Rect;
	import android.os.RemoteException;
	import android.util.Log;
	import android.util.Slog;
	import android.view.Display;
	import android.view.InputChannel;
	import android.view.KeyEvent;
	import android.view.WindowManager;

	import java.util.Arrays;

	final class InputMonitor implements InputManagerService.WindowManagerCallbacks {
	private final WindowManagerService mService;

	// Current window with input focus for keys and other non-touch events. May be null.
	private WindowState mInputFocus;

	// When true, prevents input dispatch from proceeding until set to false again.
	private boolean mInputDispatchFrozen;

	// When true, input dispatch proceeds normally. Otherwise all events are dropped.
	// Initially false, so that input does not get dispatched until boot is finished at
	// which point the ActivityManager will enable dispatching.
	private boolean mInputDispatchEnabled;

	// When true, need to call updateInputWindowsLw().
	private boolean mUpdateInputWindowsNeeded = true;

	// Array of window handles to provide to the input dispatcher.
	private InputWindowHandle[] mInputWindowHandles;
	private int mInputWindowHandleCount;

	// Set to true when the first input device configuration change notification
	// is received to indicate that the input devices are ready.
	private final Object mInputDevicesReadyMonitor = new Object();
	private boolean mInputDevicesReady;

	public InputMonitor(WindowManagerService service) {
	mService = service;
	}

	/* Notifies the window manager about a broken input channel.
	*
	* Called by the InputManager.
	*/
	public void notifyInputChannelBroken(InputWindowHandle inputWindowHandle) {
	if (inputWindowHandle == null) {
	return;
	}

	synchronized (mService.mWindowMap) {
	WindowState windowState = (WindowState) inputWindowHandle.windowState;
	if (windowState != null) {
	Slog.i(WindowManagerService.TAG, "WINDOW DIED " + windowState);
	mService.removeWindowLocked(windowState.mSession, windowState);
	}
	}
	}

	/* Notifies the window manager about an application that is not responding.
	* Returns a new timeout to continue waiting in nanoseconds, or 0 to abort dispatch.
	*
	* Called by the InputManager.
	*/
	public long notifyANR(InputApplicationHandle inputApplicationHandle,
	InputWindowHandle inputWindowHandle) {
	AppWindowToken appWindowToken = null;
	WindowState windowState = null;
	boolean aboveSystem = false;
	synchronized (mService.mWindowMap) {
	if (inputWindowHandle != null) {
	windowState = (WindowState) inputWindowHandle.windowState;
	if (windowState != null) {
	appWindowToken = windowState.mAppToken;
	}
	}
	if (appWindowToken == null && inputApplicationHandle != null) {
	appWindowToken = (AppWindowToken)inputApplicationHandle.appWindowToken;
	}

	if (windowState != null) {
	Slog.i(WindowManagerService.TAG, "Input event dispatching timed out "
	+ "sending to " + windowState.mAttrs.getTitle());
	// Figure out whether this window is layered above system windows.
	// We need to do this here to help the activity manager know how to
	// layer its ANR dialog.
	int systemAlertLayer = mService.mPolicy.windowTypeToLayerLw(
	WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
	aboveSystem = windowState.mBaseLayer > systemAlertLayer;
	} else if (appWindowToken != null) {
	Slog.i(WindowManagerService.TAG, "Input event dispatching timed out "
	+ "sending to application " + appWindowToken.stringName);
	} else {
	Slog.i(WindowManagerService.TAG, "Input event dispatching timed out.");
	}

	mService.saveANRStateLocked(appWindowToken, windowState);
	}

	if (appWindowToken != null && appWindowToken.appToken != null) {
	try {
	// Notify the activity manager about the timeout and let it decide whether
	// to abort dispatching or keep waiting.
	boolean abort = appWindowToken.appToken.keyDispatchingTimedOut();
	if (! abort) {
	// The activity manager declined to abort dispatching.
	// Wait a bit longer and timeout again later.
	return appWindowToken.inputDispatchingTimeoutNanos;
	}
	} catch (RemoteException ex) {
	}
	} else if (windowState != null) {
	try {
	// Notify the activity manager about the timeout and let it decide whether
	// to abort dispatching or keep waiting.
	long timeout = ActivityManagerNative.getDefault().inputDispatchingTimedOut(
	windowState.mSession.mPid, aboveSystem);
	if (timeout >= 0) {
	// The activity manager declined to abort dispatching.
	// Wait a bit longer and timeout again later.
	return timeout;
	}
	} catch (RemoteException ex) {
	}
	}
	return 0; // abort dispatching
	}

	private void addInputWindowHandleLw(final InputWindowHandle windowHandle) {
	if (mInputWindowHandles == null) {
	mInputWindowHandles = new InputWindowHandle[16];
	}
	if (mInputWindowHandleCount >= mInputWindowHandles.length) {
	mInputWindowHandles = Arrays.copyOf(mInputWindowHandles,
	mInputWindowHandleCount * 2);
	}
	mInputWindowHandles[mInputWindowHandleCount++] = windowHandle;
	}

	private void addInputWindowHandleLw(final InputWindowHandle inputWindowHandle,
	final WindowState child, final int flags, final int type,
	final boolean isVisible, final boolean hasFocus, final boolean hasWallpaper) {
	// Add a window to our list of input windows.
	inputWindowHandle.name = child.toString();
	inputWindowHandle.layoutParamsFlags = flags;
	inputWindowHandle.layoutParamsType = type;
	inputWindowHandle.dispatchingTimeoutNanos = child.getInputDispatchingTimeoutNanos();
	inputWindowHandle.visible = isVisible;
	inputWindowHandle.canReceiveKeys = child.canReceiveKeys();
	inputWindowHandle.hasFocus = hasFocus;
	inputWindowHandle.hasWallpaper = hasWallpaper;
	inputWindowHandle.paused = child.mAppToken != null ? child.mAppToken.paused : false;
	inputWindowHandle.layer = child.mLayer;
	inputWindowHandle.ownerPid = child.mSession.mPid;
	inputWindowHandle.ownerUid = child.mSession.mUid;
	inputWindowHandle.inputFeatures = child.mAttrs.inputFeatures;

	final Rect frame = child.mFrame;
	inputWindowHandle.frameLeft = frame.left;
	inputWindowHandle.frameTop = frame.top;
	inputWindowHandle.frameRight = frame.right;
	inputWindowHandle.frameBottom = frame.bottom;

	if (child.mGlobalScale != 1) {
	// If we are scaling the window, input coordinates need
	// to be inversely scaled to map from what is on screen
	// to what is actually being touched in the UI.
	inputWindowHandle.scaleFactor = 1.0f/child.mGlobalScale;
	} else {
	inputWindowHandle.scaleFactor = 1;
	}

	child.getTouchableRegion(inputWindowHandle.touchableRegion);

	addInputWindowHandleLw(inputWindowHandle);
	}

	private void clearInputWindowHandlesLw() {
	while (mInputWindowHandleCount != 0) {
	mInputWindowHandles[--mInputWindowHandleCount] = null;
	}
	}

	public void setUpdateInputWindowsNeededLw() {
	mUpdateInputWindowsNeeded = true;
	}

	/* Updates the cached window information provided to the input dispatcher. */
	public void updateInputWindowsLw(boolean force) {
	if (!force && !mUpdateInputWindowsNeeded) {
	return;
	}
	mUpdateInputWindowsNeeded = false;

	if (false) Slog.d(WindowManagerService.TAG, ">>>>>> ENTERED updateInputWindowsLw");

	// Populate the input window list with information about all of the windows that
	// could potentially receive input.
	// As an optimization, we could try to prune the list of windows but this turns
	// out to be difficult because only the native code knows for sure which window
	// currently has touch focus.
	final WindowStateAnimator universeBackground = mService.mAnimator.mUniverseBackground;
	final int aboveUniverseLayer = mService.mAnimator.mAboveUniverseLayer;
	boolean addedUniverse = false;

	// If there's a drag in flight, provide a pseudowindow to catch drag input
	final boolean inDrag = (mService.mDragState != null);
	if (inDrag) {
	if (WindowManagerService.DEBUG_DRAG) {
	Log.d(WindowManagerService.TAG, "Inserting drag window");
	}
	final InputWindowHandle dragWindowHandle = mService.mDragState.mDragWindowHandle;
	if (dragWindowHandle != null) {
	addInputWindowHandleLw(dragWindowHandle);
	} else {
	Slog.w(WindowManagerService.TAG, "Drag is in progress but there is no "
	+ "drag window handle.");
	}
	}

	final int NFW = mService.mFakeWindows.size();
	for (int i = 0; i < NFW; i++) {
	addInputWindowHandleLw(mService.mFakeWindows.get(i).mWindowHandle);
	}

	// Add all windows on the default display.
	final int numDisplays = mService.mDisplayContents.size();
	for (int displayNdx = 0; displayNdx < numDisplays; ++displayNdx) {
	final WindowList windows =
	mService.mDisplayContents.valueAt(displayNdx).getWindowList();
	for (int winNdx = windows.size() - 1; winNdx >= 0; --winNdx) {
	final WindowState child = windows.get(winNdx);
	final InputChannel inputChannel = child.mInputChannel;
	final InputWindowHandle inputWindowHandle = child.mInputWindowHandle;
	if (inputChannel == null \|\| inputWindowHandle == null \|\| child.mRemoved) {
	// Skip this window because it cannot possibly receive input.
	continue;
	}

	final int flags = child.mAttrs.flags;
	final int type = child.mAttrs.type;

	final boolean hasFocus = (child == mInputFocus);
	final boolean isVisible = child.isVisibleLw();
	final boolean hasWallpaper = (child == mService.mWallpaperTarget)
	&& (type != WindowManager.LayoutParams.TYPE_KEYGUARD);
	final boolean onDefaultDisplay = (child.getDisplayId() == Display.DEFAULT_DISPLAY);

	// If there's a drag in progress and 'child' is a potential drop target,
	// make sure it's been told about the drag
	if (inDrag && isVisible && onDefaultDisplay) {
	mService.mDragState.sendDragStartedIfNeededLw(child);
	}

	if (universeBackground != null && !addedUniverse
	&& child.mBaseLayer < aboveUniverseLayer && onDefaultDisplay) {
	final WindowState u = universeBackground.mWin;
	if (u.mInputChannel != null && u.mInputWindowHandle != null) {
	addInputWindowHandleLw(u.mInputWindowHandle, u, u.mAttrs.flags,
	u.mAttrs.type, true, u == mInputFocus, false);
	}
	addedUniverse = true;
	}

	if (child.mWinAnimator != universeBackground) {
	addInputWindowHandleLw(inputWindowHandle, child, flags, type,
	isVisible, hasFocus, hasWallpaper);
	}
	}
	}

	// Send windows to native code.
	mService.mInputManager.setInputWindows(mInputWindowHandles);

	// Clear the list in preparation for the next round.
	clearInputWindowHandlesLw();

	if (false) Slog.d(WindowManagerService.TAG, "<<<<<<< EXITED updateInputWindowsLw");
	}

	/* Notifies that the input device configuration has changed. */
	public void notifyConfigurationChanged() {
	mService.sendNewConfiguration();

	synchronized (mInputDevicesReadyMonitor) {
	if (!mInputDevicesReady) {
	mInputDevicesReady = true;
	mInputDevicesReadyMonitor.notifyAll();
	}
	}
	}

	/* Waits until the built-in input devices have been configured. */
	public boolean waitForInputDevicesReady(long timeoutMillis) {
	synchronized (mInputDevicesReadyMonitor) {
	if (!mInputDevicesReady) {
	try {
	mInputDevicesReadyMonitor.wait(timeoutMillis);
	} catch (InterruptedException ex) {
	}
	}
	return mInputDevicesReady;
	}
	}

	/* Notifies that the lid switch changed state. */
	public void notifyLidSwitchChanged(long whenNanos, boolean lidOpen) {
	mService.mPolicy.notifyLidSwitchChanged(whenNanos, lidOpen);
	}

	/* Provides an opportunity for the window manager policy to intercept early key
	* processing as soon as the key has been read from the device. */
	public int interceptKeyBeforeQueueing(
	KeyEvent event, int policyFlags, boolean isScreenOn) {
	return mService.mPolicy.interceptKeyBeforeQueueing(event, policyFlags, isScreenOn);
	}

	/* Provides an opportunity for the window manager policy to intercept early
	* motion event processing when the screen is off since these events are normally
	* dropped. */
	public int interceptMotionBeforeQueueingWhenScreenOff(int policyFlags) {
	return mService.mPolicy.interceptMotionBeforeQueueingWhenScreenOff(policyFlags);
	}

	/* Provides an opportunity for the window manager policy to process a key before
	* ordinary dispatch. */
	public long interceptKeyBeforeDispatching(
	InputWindowHandle focus, KeyEvent event, int policyFlags) {
	WindowState windowState = focus != null ? (WindowState) focus.windowState : null;
	return mService.mPolicy.interceptKeyBeforeDispatching(windowState, event, policyFlags);
	}

	/* Provides an opportunity for the window manager policy to process a key that
	* the application did not handle. */
	public KeyEvent dispatchUnhandledKey(
	InputWindowHandle focus, KeyEvent event, int policyFlags) {
	WindowState windowState = focus != null ? (WindowState) focus.windowState : null;
	return mService.mPolicy.dispatchUnhandledKey(windowState, event, policyFlags);
	}

	/* Callback to get pointer layer. */
	public int getPointerLayer() {
	return mService.mPolicy.windowTypeToLayerLw(WindowManager.LayoutParams.TYPE_POINTER)
	* WindowManagerService.TYPE_LAYER_MULTIPLIER
	+ WindowManagerService.TYPE_LAYER_OFFSET;
	}

	/* Called when the current input focus changes.
	* Layer assignment is assumed to be complete by the time this is called.
	*/
	public void setInputFocusLw(WindowState newWindow, boolean updateInputWindows) {
	if (WindowManagerService.DEBUG_INPUT) {
	Slog.d(WindowManagerService.TAG, "Input focus has changed to " + newWindow);
	}

	if (newWindow != mInputFocus) {
	if (newWindow != null && newWindow.canReceiveKeys()) {
	// Displaying a window implicitly causes dispatching to be unpaused.
	// This is to protect against bugs if someone pauses dispatching but
	// forgets to resume.
	newWindow.mToken.paused = false;
	}

	mInputFocus = newWindow;
	setUpdateInputWindowsNeededLw();

	if (updateInputWindows) {
	updateInputWindowsLw(false /force/);
	}
	}
	}

	public void setFocusedAppLw(AppWindowToken newApp) {
	// Focused app has changed.
	if (newApp == null) {
	mService.mInputManager.setFocusedApplication(null);
	} else {
	final InputApplicationHandle handle = newApp.mInputApplicationHandle;
	handle.name = newApp.toString();
	handle.dispatchingTimeoutNanos = newApp.inputDispatchingTimeoutNanos;

	mService.mInputManager.setFocusedApplication(handle);
	}
	}

	public void pauseDispatchingLw(WindowToken window) {
	if (! window.paused) {
	if (WindowManagerService.DEBUG_INPUT) {
	Slog.v(WindowManagerService.TAG, "Pausing WindowToken " + window);
	}

	window.paused = true;
	updateInputWindowsLw(true /force/);
	}
	}

	public void resumeDispatchingLw(WindowToken window) {
	if (window.paused) {
	if (WindowManagerService.DEBUG_INPUT) {
	Slog.v(WindowManagerService.TAG, "Resuming WindowToken " + window);
	}

	window.paused = false;
	updateInputWindowsLw(true /force/);
	}
	}

	public void freezeInputDispatchingLw() {
	if (! mInputDispatchFrozen) {
	if (WindowManagerService.DEBUG_INPUT) {
	Slog.v(WindowManagerService.TAG, "Freezing input dispatching");
	}

	mInputDispatchFrozen = true;
	updateInputDispatchModeLw();
	}
	}

	public void thawInputDispatchingLw() {
	if (mInputDispatchFrozen) {
	if (WindowManagerService.DEBUG_INPUT) {
	Slog.v(WindowManagerService.TAG, "Thawing input dispatching");
	}

	mInputDispatchFrozen = false;
	updateInputDispatchModeLw();
	}
	}

	public void setEventDispatchingLw(boolean enabled) {
	if (mInputDispatchEnabled != enabled) {
	if (WindowManagerService.DEBUG_INPUT) {
	Slog.v(WindowManagerService.TAG, "Setting event dispatching to " + enabled);
	}

	mInputDispatchEnabled = enabled;
	updateInputDispatchModeLw();
	}
	}

	private void updateInputDispatchModeLw() {
	mService.mInputManager.setInputDispatchMode(mInputDispatchEnabled, mInputDispatchFrozen);
	}
	}