services/java/com/android/server/WindowManagerService.java

/*
 * Copyright (C) 2007 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;

import static android.os.LocalPowerManager.CHEEK_EVENT;
import static android.os.LocalPowerManager.OTHER_EVENT;
import static android.os.LocalPowerManager.TOUCH_EVENT;
import static android.view.WindowManager.LayoutParams.FIRST_APPLICATION_WINDOW;
import static android.view.WindowManager.LayoutParams.FIRST_SUB_WINDOW;
import static android.view.WindowManager.LayoutParams.FLAG_BLUR_BEHIND;
import static android.view.WindowManager.LayoutParams.FLAG_DIM_BEHIND;
import static android.view.WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
import static android.view.WindowManager.LayoutParams.FLAG_SYSTEM_ERROR;
import static android.view.WindowManager.LayoutParams.LAST_APPLICATION_WINDOW;
import static android.view.WindowManager.LayoutParams.LAST_SUB_WINDOW;
import static android.view.WindowManager.LayoutParams.MEMORY_TYPE_GPU;
import static android.view.WindowManager.LayoutParams.MEMORY_TYPE_HARDWARE;
import static android.view.WindowManager.LayoutParams.MEMORY_TYPE_PUSH_BUFFERS;
import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_STARTING;
import static android.view.WindowManager.LayoutParams.TYPE_BASE_APPLICATION;

import com.android.internal.app.IBatteryStats;
import com.android.internal.policy.PolicyManager;
import com.android.server.KeyInputQueue.QueuedEvent;
import com.android.server.am.BatteryStats;

import android.Manifest;
import android.app.ActivityManagerNative;
import android.app.IActivityManager;
import android.content.Context;
import android.content.pm.ActivityInfo;
import android.content.pm.PackageManager;
import android.content.res.Configuration;
import android.graphics.Matrix;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.Region;
import android.os.Binder;
import android.os.Debug;
import android.os.Handler;
import android.os.IBinder;
import android.os.LocalPowerManager;
import android.os.Looper;
import android.os.Message;
import android.os.Parcel;
import android.os.ParcelFileDescriptor;
import android.os.PowerManager;
import android.os.Process;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.SystemClock;
import android.os.SystemProperties;
import android.os.TokenWatcher;
import android.provider.Settings;
import android.util.Config;
import android.util.EventLog;
import android.util.Log;
import android.util.SparseIntArray;
import android.view.Display;
import android.view.Gravity;
import android.view.IApplicationToken;
import android.view.IOnKeyguardExitResult;
import android.view.IRotationWatcher;
import android.view.IWindow;
import android.view.IWindowManager;
import android.view.IWindowSession;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.RawInputEvent;
import android.view.Surface;
import android.view.SurfaceSession;
import android.view.View;
import android.view.WindowManager;
import android.view.WindowManagerImpl;
import android.view.WindowManagerPolicy;
import android.view.WindowManager.LayoutParams;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.view.animation.Transformation;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileDescriptor;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.net.Socket;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;

/** {@hide} */
public class WindowManagerService extends IWindowManager.Stub implements Watchdog.Monitor {
    static final String TAG = "WindowManager";
    static final boolean DEBUG = false;
    static final boolean DEBUG_FOCUS = false;
    static final boolean DEBUG_ANIM = false;
    static final boolean DEBUG_INPUT = false;
    static final boolean DEBUG_VISIBILITY = false;
    static final boolean DEBUG_ORIENTATION = false;
    static final boolean DEBUG_APP_TRANSITIONS = false;
    static final boolean DEBUG_STARTING_WINDOW = false;
    static final boolean DEBUG_REORDER = false;
    static final boolean SHOW_TRANSACTIONS = false;
    
    static final boolean PROFILE_ORIENTATION = false;
    static final boolean BLUR = true;
    static final boolean localLOGV = DEBUG ? Config.LOGD : Config.LOGV;
    
    static final int LOG_WM_NO_SURFACE_MEMORY = 31000;
    
    /** How long to wait for first key repeat, in milliseconds */
    static final int KEY_REPEAT_FIRST_DELAY = 750;
    
    /** How long to wait for subsequent key repeats, in milliseconds */
    static final int KEY_REPEAT_DELAY = 50;

    /** How much to multiply the policy's type layer, to reserve room
     * for multiple windows of the same type and Z-ordering adjustment
     * with TYPE_LAYER_OFFSET. */
    static final int TYPE_LAYER_MULTIPLIER = 10000;
    
    /** Offset from TYPE_LAYER_MULTIPLIER for moving a group of windows above
     * or below others in the same layer. */
    static final int TYPE_LAYER_OFFSET = 1000;
    
    /** How much to increment the layer for each window, to reserve room
     * for effect surfaces between them.
     */
    static final int WINDOW_LAYER_MULTIPLIER = 5;
    
    /** The maximum length we will accept for a loaded animation duration:
     * this is 10 seconds.
     */
    static final int MAX_ANIMATION_DURATION = 10*1000;

    private static final String SYSTEM_SECURE = "ro.secure";

    /**
     * Condition waited on by {@link #reenableKeyguard} to know the call to
     * the window policy has finished.
     */
    private boolean mWaitingUntilKeyguardReenabled = false;


    final TokenWatcher mKeyguardDisabled = new TokenWatcher(
            new Handler(), "WindowManagerService.mKeyguardDisabled") {
        public void acquired() {
            mPolicy.enableKeyguard(false);
        }
        public void released() {
            synchronized (mKeyguardDisabled) {
                mPolicy.enableKeyguard(true);
                mWaitingUntilKeyguardReenabled = false;
                mKeyguardDisabled.notifyAll();
            }
        }
    };

    final Context mContext;

    final WindowManagerPolicy mPolicy = PolicyManager.makeNewWindowManager();

    final IActivityManager mActivityManager;
    
    final IBatteryStats mBatteryStats;
    
    /**
     * All currently active sessions with clients.
     */
    final HashSet<Session> mSessions = new HashSet<Session>();
    
    /**
     * Mapping from an IWindow IBinder to the server's Window object.
     * This is also used as the lock for all of our state.
     */
    final HashMap<IBinder, WindowState> mWindowMap = new HashMap<IBinder, WindowState>();

    /**
     * Mapping from a token IBinder to a WindowToken object.
     */
    final HashMap<IBinder, WindowToken> mTokenMap =
            new HashMap<IBinder, WindowToken>();

    /**
     * The same tokens as mTokenMap, stored in a list for efficient iteration
     * over them.
     */
    final ArrayList<WindowToken> mTokenList = new ArrayList<WindowToken>();
    
    /**
     * Z-ordered (bottom-most first) list of all application tokens, for
     * controlling the ordering of windows in different applications.  This
     * contains WindowToken objects.
     */
    final ArrayList<AppWindowToken> mAppTokens = new ArrayList<AppWindowToken>();

    /**
     * Application tokens that are in the process of exiting, but still
     * on screen for animations.
     */
    final ArrayList<AppWindowToken> mExitingAppTokens = new ArrayList<AppWindowToken>();

    /**
     * List of window tokens that have finished starting their application,
     * and now need to have the policy remove their windows.
     */
    final ArrayList<AppWindowToken> mFinishedStarting = new ArrayList<AppWindowToken>();

    /**
     * Z-ordered (bottom-most first) list of all Window objects.
     */
    final ArrayList mWindows = new ArrayList();

    /**
     * Windows that are being resized.  Used so we can tell the client about
     * the resize after closing the transaction in which we resized the
     * underlying surface.
     */
    final ArrayList<WindowState> mResizingWindows = new ArrayList<WindowState>();

    /**
     * Windows whose animations have ended and now must be removed.
     */
    final ArrayList<WindowState> mPendingRemove = new ArrayList<WindowState>();

    /**
     * Windows whose surface should be destroyed.
     */
    final ArrayList<WindowState> mDestroySurface = new ArrayList<WindowState>();

    /**
     * Windows that have lost input focus and are waiting for the new
     * focus window to be displayed before they are told about this.
     */
    ArrayList<WindowState> mLosingFocus = new ArrayList<WindowState>();

    /**
     * This is set when we have run out of memory, and will either be an empty
     * list or contain windows that need to be force removed.
     */
    ArrayList<WindowState> mForceRemoves;
    
    SurfaceSession mFxSession;
    Surface mDimSurface;
    boolean mDimShown;
    Surface mBlurSurface;
    boolean mBlurShown;
    
    int mTransactionSequence = 0;
    
    final float[] mTmpFloats = new float[9];

    boolean mDisplayEnabled = false;
    boolean mSystemBooted = false;
    int mRotation = 0;
    int mRequestedRotation = 0;
    int mForcedAppOrientation = ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED;
    ArrayList<IRotationWatcher> mRotationWatchers
            = new ArrayList<IRotationWatcher>();
    
    boolean mLayoutNeeded = true;
    boolean mAnimationPending = false;
    boolean mSurfacesChanged = false;
    boolean mDisplayFrozen = false;
    boolean mWindowsFreezingScreen = false;
    long mFreezeGcPending = 0;
    int mAppsFreezingScreen = 0;

    // State management of app transitions.  When we are preparing for a
    // transition, mNextAppTransition will be the kind of transition to
    // perform or TRANSIT_NONE if we are not waiting.  If we are waiting,
    // mOpeningApps and mClosingApps are the lists of tokens that will be
    // made visible or hidden at the next transition.
    int mNextAppTransition = WindowManagerPolicy.TRANSIT_NONE;
    boolean mAppTransitionReady = false;
    boolean mAppTransitionTimeout = false;
    boolean mStartingIconInTransition = false;
    boolean mSkipAppTransitionAnimation = false;
    final ArrayList<AppWindowToken> mOpeningApps = new ArrayList<AppWindowToken>();
    final ArrayList<AppWindowToken> mClosingApps = new ArrayList<AppWindowToken>();
    
    //flag to detect fat touch events
    boolean mFatTouch = false;
    Display mDisplay;
    
    H mH = new H();

    WindowState mCurrentFocus = null;
    WindowState mLastFocus = null;

    AppWindowToken mFocusedApp = null;

    PowerManagerService mPowerManager;
    
    float mWindowAnimationScale = 1.0f;
    float mTransitionAnimationScale = 0.0f;
    
    final KeyWaiter mKeyWaiter = new KeyWaiter();
    final KeyQ mQueue;
    final InputDispatcherThread mInputThread;

    // Who is holding the screen on.
    Session mHoldingScreenOn;
    
    /**
     * Whether the UI is currently running in touch mode (not showing
     * navigational focus because the user is directly pressing the screen).
     */
    boolean mInTouchMode = false;

    private ViewServer mViewServer;

    public static WindowManagerService main(
            Context context, PowerManagerService pm) {
        WMThread thr = new WMThread(context, pm);
        thr.start();
        
        synchronized (thr) {
            while (thr.mService == null) {
                try {
                    thr.wait();
                } catch (InterruptedException e) {
                }
            }
        }
        
        return thr.mService;
    }
    
    static class WMThread extends Thread {
        WindowManagerService mService;
        
        private final Context mContext;
        private final PowerManagerService mPM;
        
        public WMThread(Context context, PowerManagerService pm) {
            super("WindowManager");
            mContext = context;
            mPM = pm;
        }
        
        public void run() {
            Looper.prepare();
            WindowManagerService s = new WindowManagerService(mContext, mPM);
            android.os.Process.setThreadPriority(
                    android.os.Process.THREAD_PRIORITY_DISPLAY);
            
            synchronized (this) {
                mService = s;
                notifyAll();
            }
            
            Looper.loop();
        }
    }

    static class PolicyThread extends Thread {
        private final WindowManagerPolicy mPolicy;
        private final WindowManagerService mService;
        private final Context mContext;
        private final PowerManagerService mPM;
        boolean mRunning = false;
        
        public PolicyThread(WindowManagerPolicy policy,
                WindowManagerService service, Context context,
                PowerManagerService pm) {
            super("WindowManagerPolicy");
            mPolicy = policy;
            mService = service;
            mContext = context;
            mPM = pm;
        }
        
        public void run() {
            Looper.prepare();
            //Looper.myLooper().setMessageLogging(new LogPrinter(
            //        Log.VERBOSE, "WindowManagerPolicy"));
            android.os.Process.setThreadPriority(
                    android.os.Process.THREAD_PRIORITY_FOREGROUND);
            mPolicy.init(mContext, mService, mPM);
            
            synchronized (this) {
                mRunning = true;
                notifyAll();
            }
            
            Looper.loop();
        }
    }

    private WindowManagerService(Context context, PowerManagerService pm) {
        mContext = context;
        
        mPowerManager = pm;
        mPowerManager.setPolicy(mPolicy);

        mActivityManager = ActivityManagerNative.getDefault();
        mBatteryStats = BatteryStats.getService();

        // Get persisted window scale setting
        mWindowAnimationScale = Settings.System.getFloat(context.getContentResolver(),
                Settings.System.WINDOW_ANIMATION_SCALE, mWindowAnimationScale);
        mTransitionAnimationScale = Settings.System.getFloat(context.getContentResolver(),
                Settings.System.TRANSITION_ANIMATION_SCALE, mTransitionAnimationScale);
        
        mQueue = new KeyQ();

        mInputThread = new InputDispatcherThread();
        
        PolicyThread thr = new PolicyThread(mPolicy, this, context, pm);
        thr.start();
        
        synchronized (thr) {
            while (!thr.mRunning) {
                try {
                    thr.wait();
                } catch (InterruptedException e) {
                }
            }
        }
        
        mInputThread.start();
        
        // Add ourself to the Watchdog monitors.
        Watchdog.getInstance().addMonitor(this);
    }

    @Override
    public boolean onTransact(int code, Parcel data, Parcel reply, int flags)
            throws RemoteException {
        try {
            return super.onTransact(code, data, reply, flags);
        } catch (RuntimeException e) {
            // The activity manager only throws security exceptions, so let's
            // log all others.
            if (!(e instanceof SecurityException)) {
                Log.e(TAG, "Window Manager Crash", e);
            }
            throw e;
        }
    }

    private void placeWindowAfter(Object pos, WindowState window) {
        final int i = mWindows.indexOf(pos);
        if (localLOGV || DEBUG_FOCUS) Log.v(
            TAG, "Adding window " + window + " at "
            + (i+1) + " of " + mWindows.size() + " (after " + pos + ")");
        mWindows.add(i+1, window);
    }

    private void placeWindowBefore(Object pos, WindowState window) {
        final int i = mWindows.indexOf(pos);
        if (localLOGV || DEBUG_FOCUS) Log.v(
            TAG, "Adding window " + window + " at "
            + i + " of " + mWindows.size() + " (before " + pos + ")");
        mWindows.add(i, window);
    }

    //This method finds out the index of a window that has the same app token as
    //win. used for z ordering the windows in mWindows
    private int findIdxBasedOnAppTokens(WindowState win) {
        //use a local variable to cache mWindows
        ArrayList localmWindows = mWindows;
        int jmax = localmWindows.size();
        if(jmax == 0) {
            return -1;
        }
        for(int j = (jmax-1); j >= 0; j--) {
            WindowState wentry = (WindowState)localmWindows.get(j);
            if(wentry.mAppToken == win.mAppToken) {
                return j;
            }
        }
        return -1;
    }
    
    private void addWindowToListInOrderLocked(WindowState win) {
        final IWindow client = win.mClient;
        final WindowToken token = win.mToken;
        final ArrayList localmWindows = mWindows;
        
        final int N = localmWindows.size();
        final WindowState attached = win.mAttachedWindow;
        int i;
        if (attached == null) {
            int tokenWindowsPos = token.windows.size();
            if (token.appWindowToken != null) {
                int index = tokenWindowsPos-1;
                if (index >= 0) {
                    // If this application has existing windows, we
                    // simply place the new window on top of them... but
                    // keep the starting window on top.
                    if (win.mAttrs.type == TYPE_BASE_APPLICATION) {
                        // Base windows go behind everything else.
                        placeWindowBefore(token.windows.get(0), win);
                        tokenWindowsPos = 0;
                    } else {
                        AppWindowToken atoken = win.mAppToken;
                        if (atoken != null &&
                                token.windows.get(index) == atoken.startingWindow) {
                            placeWindowBefore(token.windows.get(index), win);
                            tokenWindowsPos--;
                        } else {
                            int newIdx =  findIdxBasedOnAppTokens(win);
                            if(newIdx != -1) {
                                //there is a window above this one associated with the same 
                                //apptoken note that the window could be a floating window 
                                //that was created later or a window at the top of the list of 
                                //windows associated with this token.
                                localmWindows.add(newIdx+1, win);
                            } 
                        }
                    }
                } else {
                    if (localLOGV) Log.v(
                        TAG, "Figuring out where to add app window "
                        + client.asBinder() + " (token=" + token + ")");
                    // Figure out where the window should go, based on the
                    // order of applications.
                    final int NA = mAppTokens.size();
                    Object pos = null;
                    for (i=NA-1; i>=0; i--) {
                        AppWindowToken t = mAppTokens.get(i);
                        if (t == token) {
                            i--;
                            break;
                        }
                        if (t.windows.size() > 0) {
                            pos = t.windows.get(0);
                        }
                    }
                    // We now know the index into the apps.  If we found
                    // an app window above, that gives us the position; else
                    // we need to look some more.
                    if (pos != null) {
                        // Move behind any windows attached to this one.
                        WindowToken atoken = 
                            mTokenMap.get(((WindowState)pos).mClient.asBinder());
                        if (atoken != null) {
                            final int NC = atoken.windows.size();
                            if (NC > 0) {
                                WindowState bottom = atoken.windows.get(0);
                                if (bottom.mSubLayer < 0) {
                                    pos = bottom;
                                }
                            }
                        }
                        placeWindowBefore(pos, win);
                    } else {
                        while (i >= 0) {
                            AppWindowToken t = mAppTokens.get(i);
                            final int NW = t.windows.size();
                            if (NW > 0) {
                                pos = t.windows.get(NW-1);
                                break;
                            }
                            i--;
                        }
                        if (pos != null) {
                            // Move in front of any windows attached to this
                            // one.
                            WindowToken atoken =
                                mTokenMap.get(((WindowState)pos).mClient.asBinder());
                            if (atoken != null) {
                                final int NC = atoken.windows.size();
                                if (NC > 0) {
                                    WindowState top = atoken.windows.get(NC-1);
                                    if (top.mSubLayer >= 0) {
                                        pos = top;
                                    }
                                }
                            }
                            placeWindowAfter(pos, win);
                        } else {
                            // Just search for the start of this layer.
                            final int myLayer = win.mBaseLayer;
                            for (i=0; i<N; i++) {
                                WindowState w = (WindowState)localmWindows.get(i);
                                if (w.mBaseLayer > myLayer) {
                                    break;
                                }
                            }
                            if (localLOGV || DEBUG_FOCUS) Log.v(
                                TAG, "Adding window " + win + " at "
                                + i + " of " + N);
                            localmWindows.add(i, win);
                        }
                    }
                }
            } else {
                // Figure out where window should go, based on layer.
                final int myLayer = win.mBaseLayer;
                for (i=N-1; i>=0; i--) {
                    if (((WindowState)localmWindows.get(i)).mBaseLayer <= myLayer) {
                        i++;
                        break;
                    }
                }
                if (i < 0) i = 0;
                if (localLOGV || DEBUG_FOCUS) Log.v(
                    TAG, "Adding window " + win + " at "
                    + i + " of " + N);
                localmWindows.add(i, win);
            }
            token.windows.add(tokenWindowsPos, win);

        } else {
            // Figure out this window's ordering relative to the window
            // it is attached to.
            final int NA = token.windows.size();
            final int sublayer = win.mSubLayer;
            int largestSublayer = Integer.MIN_VALUE;
            WindowState windowWithLargestSublayer = null;
            for (i=0; i<NA; i++) {
                WindowState w = token.windows.get(i);
                final int wSublayer = w.mSubLayer;
                if (wSublayer >= largestSublayer) {
                    largestSublayer = wSublayer;
                    windowWithLargestSublayer = w;
                }
                if (sublayer < 0) {
                    // For negative sublayers, we go below all windows
                    // in the same sublayer.
                    if (wSublayer >= sublayer) {
                        token.windows.add(i, win);
                        placeWindowBefore(
                            wSublayer >= 0 ? attached : w, win);
                        break;
                    }
                } else {
                    // For positive sublayers, we go above all windows
                    // in the same sublayer.
                    if (wSublayer > sublayer) {
                        token.windows.add(i, win);
                        placeWindowBefore(w, win);
                        break;
                    }
                }
            }
            if (i >= NA) {
                token.windows.add(win);
                if (sublayer < 0) {
                    placeWindowBefore(attached, win);
                } else {
                    placeWindowAfter(largestSublayer >= 0
                                     ? windowWithLargestSublayer
                                     : attached,
                                     win);
                }
            }
        }
        
        if (win.mAppToken != null) {
            win.mAppToken.allAppWindows.add(win);
        }
    }
    
    public int addWindow(Session session, IWindow client,
            WindowManager.LayoutParams attrs, int viewVisibility,
            Rect outCoveredInsets) {
        int res = mPolicy.checkAddPermission(attrs);
        if (res != WindowManagerImpl.ADD_OKAY) {
            return res;
        }
        
        boolean reportNewConfig = false;
        WindowState attachedWindow = null;
        WindowState win = null;
        
        synchronized(mWindowMap) {
            // Instantiating a Display requires talking with the simulator,
            // so don't do it until we know the system is mostly up and
            // running.
            if (mDisplay == null) {
                WindowManager wm = (WindowManager)mContext.getSystemService(Context.WINDOW_SERVICE);
                mDisplay = wm.getDefaultDisplay();
                mQueue.setDisplay(mDisplay);
                reportNewConfig = true;
            }
            
            if (mWindowMap.containsKey(client.asBinder())) {
                Log.w(TAG, "Window " + client + " is already added");
                return WindowManagerImpl.ADD_DUPLICATE_ADD;
            }

            if (attrs.type >= FIRST_SUB_WINDOW && attrs.type <= LAST_SUB_WINDOW) {
                attachedWindow = windowForClientLocked(session, attrs.token); 
                if (attachedWindow == null) {
                    Log.w(TAG, "Attempted to add window with token that is not a window: "
                          + attrs.token + ".  Aborting.");
                    return WindowManagerImpl.ADD_BAD_SUBWINDOW_TOKEN;
                }
                if (attachedWindow.mAttrs.type >= FIRST_SUB_WINDOW
                        && attachedWindow.mAttrs.type <= LAST_SUB_WINDOW) {
                    Log.w(TAG, "Attempted to add window with token that is a sub-window: "
                            + attrs.token + ".  Aborting.");
                    return WindowManagerImpl.ADD_BAD_SUBWINDOW_TOKEN;
                }
            }

            boolean addToken = false;
            WindowToken token = mTokenMap.get(attrs.token);
            if (token == null) {
                if (attrs.type >= FIRST_APPLICATION_WINDOW
                        && attrs.type <= LAST_APPLICATION_WINDOW) {
                    Log.w(TAG, "Attempted to add application window with unknown token "
                          + attrs.token + ".  Aborting.");
                    return WindowManagerImpl.ADD_BAD_APP_TOKEN;
                }
                token = new WindowToken(attrs.token);
                addToken = true;
            } else if (attrs.type >= FIRST_APPLICATION_WINDOW
                    && attrs.type <= LAST_APPLICATION_WINDOW) {
                AppWindowToken atoken = token.appWindowToken;
                if (atoken == null) {
                    Log.w(TAG, "Attempted to add window with non-application token "
                          + token + ".  Aborting.");
                    return WindowManagerImpl.ADD_NOT_APP_TOKEN;
                } else if (atoken.removed) {
                    Log.w(TAG, "Attempted to add window with exiting application token "
                          + token + ".  Aborting.");
                    return WindowManagerImpl.ADD_APP_EXITING;
                }
                if (attrs.type == TYPE_APPLICATION_STARTING && atoken.firstWindowDrawn) {
                    // No need for this guy!
                    if (localLOGV) Log.v(
                            TAG, "**** NO NEED TO START: " + attrs.getTitle());
                    return WindowManagerImpl.ADD_STARTING_NOT_NEEDED;
                }
            }

            win = new WindowState(session, client, token,
                    attachedWindow, attrs, viewVisibility);
            if (win.mDeathRecipient == null) {
                // Client has apparently died, so there is no reason to
                // continue.
                Log.w(TAG, "Adding window client " + client.asBinder()
                        + " that is dead, aborting.");
                return WindowManagerImpl.ADD_APP_EXITING;
            }

            mPolicy.adjustWindowParamsLw(win.mAttrs);
            
            res = mPolicy.prepareAddWindowLw(win, attrs);
            if (res != WindowManagerImpl.ADD_OKAY) {
                return res;
            }

            // From now on, no exceptions or errors allowed!

            res = WindowManagerImpl.ADD_OKAY;
            
            final long origId = Binder.clearCallingIdentity();
            
            if (addToken) {
                mTokenMap.put(attrs.token, token);
                mTokenList.add(token);
            }
            win.attach();
            mWindowMap.put(client.asBinder(), win);

            if (attrs.type == TYPE_APPLICATION_STARTING &&
                    token.appWindowToken != null) {
                token.appWindowToken.startingWindow = win;
            }

            addWindowToListInOrderLocked(win);
            
            assignLayersLocked();
            // Don't do layout here, the window must call
            // relayout to be displayed, so we'll do it there.
            
            //dump();

            Binder.restoreCallingIdentity(origId);
            
            win.mEnterAnimationPending = true;
            
            mPolicy.getCoveredInsetHintLw(attrs, outCoveredInsets);
            
            if (mInTouchMode) {
                res |= WindowManagerImpl.ADD_FLAG_IN_TOUCH_MODE;
            }
            if (win == null || win.mAppToken == null || !win.mAppToken.clientHidden) {
                res |= WindowManagerImpl.ADD_FLAG_APP_VISIBLE;
            }
            
            if (win.canReceiveKeys()) {
                updateFocusedWindowLocked();
            }
            
            if (localLOGV) Log.v(
                TAG, "New client " + client.asBinder()
                + ": window=" + win);
        }

        if (reportNewConfig) {
            final long origId = Binder.clearCallingIdentity();
            sendNewConfiguration();
            Binder.restoreCallingIdentity(origId);
        }
        
        return res;
    }
    
    public void removeWindow(Session session, IWindow client) {
        synchronized(mWindowMap) {
            WindowState win = windowForClientLocked(session, client);
            if (win == null) {
                return;
            }
            removeWindowLocked(session, win);
        }
    }
    
    public void removeWindowLocked(Session session, WindowState win) {

        if (localLOGV || DEBUG_FOCUS) Log.v(
            TAG, "Remove " + win + " client="
            + Integer.toHexString(System.identityHashCode(
                win.mClient.asBinder()))
            + ", surface=" + win.mSurface);

        final long origId = Binder.clearCallingIdentity();
        
        if (DEBUG_APP_TRANSITIONS) Log.v(
                TAG, "Remove " + win + ": mSurface=" + win.mSurface
                + " mExiting=" + win.mExiting
                + " isAnimating=" + win.isAnimating()
                + " app-animation="
                + (win.mAppToken != null ? win.mAppToken.animation : null)
                + " inPendingTransaction="
                + (win.mAppToken != null ? win.mAppToken.inPendingTransaction : false)
                + " mDisplayFrozen=" + mDisplayFrozen);
        
        // First, see if we need to run an animation.  If we do, we have
        // to hold off on removing the window until the animation is done.
        // If the display is frozen, just remove immediately, since the
        // animation wouldn't be seen.
        if (win.mSurface != null && !mDisplayFrozen) {
            // If we are not currently running the exit animation, we
            // need to see about starting one.
            if (!win.mExiting && !win.mDrawPending && !win.mCommitDrawPending) {
                int transit = WindowManagerPolicy.TRANSIT_EXIT;
                if (win.getAttrs().type == TYPE_APPLICATION_STARTING) {
                    transit = WindowManagerPolicy.TRANSIT_PREVIEW_DONE;
                }
                // Try starting an animation.
                if (applyAnimationLocked(win, transit, false)) {
                    win.mExiting = true;
                }
            }
            if (win.mExiting || win.isAnimating()) {
                // The exit animation is running... wait for it!
                //Log.i(TAG, "*** Running exit animation...");
                win.mExiting = true;
                win.mRemoveOnExit = true;
                mLayoutNeeded = true;
                performLayoutAndPlaceSurfacesLocked();
                updateFocusedWindowLocked();
                if (win.mAppToken != null) {
                    win.mAppToken.updateReportedVisibilityLocked();
                }
                //dump();
                Binder.restoreCallingIdentity(origId);
                return;
            }
        }

        removeWindowInnerLocked(session, win);
        updateFocusedWindowLocked();
        Binder.restoreCallingIdentity(origId);
    }
    
    private void removeWindowInnerLocked(Session session, WindowState win) {
        mKeyWaiter.releasePendingPointerLocked(win.mSession);
        mKeyWaiter.releasePendingTrackballLocked(win.mSession);
        
        mPolicy.removeWindowLw(win);
        win.removeLocked();

        mWindowMap.remove(win.mClient.asBinder());
        mWindows.remove(win);

        final WindowToken token = win.mToken;
        final AppWindowToken atoken = win.mAppToken;
        token.windows.remove(win);
        if (atoken != null) {
            atoken.allAppWindows.remove(win);
        }
        if (localLOGV) Log.v(
                TAG, "**** Removing window " + win + ": count="
                + token.windows.size());
        if (token.windows.size() == 0) {
            if (atoken != token) {
                mTokenMap.remove(token.token);
                mTokenList.remove(token);
            } else {
                atoken.firstWindowDrawn = false;
            }
        }

        if (atoken != null) {
            if (atoken.startingWindow == win) {
                atoken.startingWindow = null;
            } else if (atoken.allAppWindows.size() == 0 && atoken.startingData != null) {
                // If this is the last window and we had requested a starting
                // transition window, well there is no point now.
                atoken.startingData = null;
            } else if (atoken.allAppWindows.size() == 1 && atoken.startingView != null) {
                // If this is the last window except for a starting transition
                // window, we need to get rid of the starting transition.
                if (DEBUG_STARTING_WINDOW) {
                    Log.v(TAG, "Schedule remove starting " + token
                            + ": no more real windows");
                }
                Message m = mH.obtainMessage(H.REMOVE_STARTING, atoken);
                mH.sendMessage(m);
            }
        }
        
        if (!mInLayout) {
            assignLayersLocked();
            mLayoutNeeded = true;
            performLayoutAndPlaceSurfacesLocked();
            if (win.mAppToken != null) {
                win.mAppToken.updateReportedVisibilityLocked();
            }
        }
    }

    private void setTransparentRegionWindow(Session session, IWindow client, Region region) {
        long origId = Binder.clearCallingIdentity();
        try {
            synchronized (mWindowMap) {
                WindowState w = windowForClientLocked(session, client);
                if ((w != null) && (w.mSurface != null)) {
                    Surface.openTransaction();
                    try {
                        w.mSurface.setTransparentRegionHint(region);
                    } finally {
                        Surface.closeTransaction();
                    }
                }
            }
        } finally {
            Binder.restoreCallingIdentity(origId);
        }
    }


    public int relayoutWindow(Session session, IWindow client, WindowManager.LayoutParams attrs,
            int requestedWidth, int requestedHeight, int viewVisibility, Rect outFrame,
            Rect outCoveredInsets, Surface outSurface) {
        boolean displayed = false;
        boolean inTouchMode;

        long origId = Binder.clearCallingIdentity();
        
        synchronized(mWindowMap) {
            WindowState win = windowForClientLocked(session, client);
            if (win == null) {
                return 0;
            }
            win.mRequestedWidth = requestedWidth;
            win.mRequestedHeight = requestedHeight;

            if (attrs != null) {
                mPolicy.adjustWindowParamsLw(attrs);
            }
            
            boolean windowfocusabilityChanged = attrs != null && 
                ((attrs.flags & WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE) != 
                (win.mAttrs.flags & WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE));
                        
            int attrChanges = 0;
            if (attrs != null) attrChanges = win.mAttrs.copyFrom(attrs);

            if (localLOGV) Log.v(
                TAG, "Relayout given client " + client.asBinder()
                + " (" + win.mAttrs.getTitle() + ")");


            if ((attrChanges & WindowManager.LayoutParams.ALPHA_CHANGED) != 0) {
                win.mAlpha = attrs.alpha;
            }

            final boolean scaledWindow =
                ((win.mAttrs.flags & WindowManager.LayoutParams.FLAG_SCALED) != 0);

            if (scaledWindow) {
                // requested{Width|Height} Surface's physical size
                // attrs.{width|height} Size on screen
                win.mHScale = (attrs.width  != requestedWidth)  ?
                        (attrs.width  / (float)requestedWidth) : 1.0f;
                win.mVScale = (attrs.height != requestedHeight) ?
                        (attrs.height / (float)requestedHeight) : 1.0f;
            }

            boolean focusMayChange = win.mViewVisibility != viewVisibility
                    || windowfocusabilityChanged
                    || (!win.mRelayoutCalled);
            win.mRelayoutCalled = true;
            win.mViewVisibility = viewVisibility;
            if (viewVisibility == View.VISIBLE &&
                    (win.mAppToken == null || !win.mAppToken.clientHidden)) {
                displayed = !win.isVisible();
                if (win.mExiting) {
                    win.mExiting = false;
                    win.mAnimation = null;
                }
                if (win.mDestroying) {
                    win.mDestroying = false;
                    mDestroySurface.remove(win);
                }
                if (displayed && win.mSurface != null && !win.mDrawPending
                        && !win.mCommitDrawPending && !mDisplayFrozen) {
                    applyEnterAnimationLocked(win);
                }
                try {
                    Surface surface = win.createSurfaceLocked();
                    if (surface != null) {
                        outSurface.copyFrom(surface);
                    } else {
                        outSurface.clear();
                    }
                } catch (Exception e) {
                    Log.w(TAG, "Exception thrown when creating surface for client "
                         + client + " (" + win.mAttrs.getTitle() + ")",
                         e);
                    Binder.restoreCallingIdentity(origId);
                    return 0;
                }
                if (displayed) {
                    focusMayChange = true;
                }
            } else {
                if (win.mSurface != null) {
                    // If we are not currently running the exit animation, we
                    // need to see about starting one.
                    if (!win.mExiting) {
                        // Try starting an animation; if there isn't one, we
                        // can destroy the surface right away.
                        int transit = WindowManagerPolicy.TRANSIT_EXIT;
                        if (win.getAttrs().type == TYPE_APPLICATION_STARTING) {
                            transit = WindowManagerPolicy.TRANSIT_PREVIEW_DONE;
                        }
                        if (!win.mExiting && !win.mDrawPending &&
                              applyAnimationLocked(win, transit, false)) {
                            win.mExiting = true;
                            mKeyWaiter.finishedKey(session, client, true,
                                    KeyWaiter.RETURN_NOTHING);
                        } else if (win.isAnimating()) {
                            // Currently in a hide animation... turn this into
                            // an exit.
                            win.mExiting = true;
                        } else {
                            win.destroySurfaceLocked();
                        }
                    }
                }
                outSurface.clear();
            }

            mLayoutNeeded = true;
            performLayoutAndPlaceSurfacesLocked();
            if (win.mAppToken != null) {
                win.mAppToken.updateReportedVisibilityLocked();
            }
            outFrame.set(win.mFrame);
            outCoveredInsets.set(win.mCoveredInsets);
            if (localLOGV) Log.v(
                TAG, "Relayout given client " + client.asBinder()
                + ", requestedWidth=" + requestedWidth 
                + ", requestedHeight=" + requestedHeight
                + ", viewVisibility=" + viewVisibility
                + "\nRelayout returning frame=" + outFrame
                + ", surface=" + outSurface);

            if (localLOGV || DEBUG_FOCUS) Log.v(
                TAG, "Relayout of " + win + ": focusMayChange=" + focusMayChange);

            if (focusMayChange) {
                //System.out.println("Focus may change: " + win.mAttrs.getTitle());
                updateFocusedWindowLocked();
                //System.out.println("Relayout " + win + ": focus=" + mCurrentFocus);
            }
            
            inTouchMode = mInTouchMode;
        }

        Binder.restoreCallingIdentity(origId);
        
        return (inTouchMode ? WindowManagerImpl.RELAYOUT_IN_TOUCH_MODE : 0)
                | (displayed ? WindowManagerImpl.RELAYOUT_FIRST_TIME : 0);
    }

    public void finishDrawingWindow(Session session, IWindow client) {
        final long origId = Binder.clearCallingIdentity();
        synchronized(mWindowMap) {
            WindowState win = windowForClientLocked(session, client);
            if (win != null && win.finishDrawingLocked()) {
                mLayoutNeeded = true;
                performLayoutAndPlaceSurfacesLocked();
            }
        }
        Binder.restoreCallingIdentity(origId);
    }

    private AttributeCache.Entry getCachedAnimations(WindowManager.LayoutParams lp) {
        if (DEBUG_ANIM) Log.v(TAG, "Loading animations: params package="
                + (lp != null ? lp.packageName : null)
                + " resId=0x" + (lp != null ? Integer.toHexString(lp.windowAnimations) : null));
        if (lp != null && lp.windowAnimations != 0) {
            // If this is a system resource, don't try to load it from the
            // application resources.  It is nice to avoid loading application
            // resources if we can.
            String packageName = lp.packageName != null ? lp.packageName : "android";
            int resId = lp.windowAnimations;
            if ((resId&0xFF000000) == 0x01000000) {
                packageName = "android";
            }
            if (DEBUG_ANIM) Log.v(TAG, "Loading animations: picked package="
                    + packageName);
            return AttributeCache.instance().get(packageName, resId,
                    com.android.internal.R.styleable.WindowAnimation);
        }
        return null;
    }
    
    private void applyEnterAnimationLocked(WindowState win) {
        int transit = WindowManagerPolicy.TRANSIT_SHOW;
        if (win.mEnterAnimationPending) {
            win.mEnterAnimationPending = false;
            transit = WindowManagerPolicy.TRANSIT_ENTER;
        }

        applyAnimationLocked(win, transit, true);
    }

    private boolean applyAnimationLocked(WindowState win,
            int transit, boolean isEntrance) {
        if (win.mAnimating && win.mAnimationIsEntrance == isEntrance) {
            // If we are trying to apply an animation, but already running
            // an animation of the same type, then just leave that one alone.
            return true;
        }
        
        // Only apply an animation if the display isn't frozen.  If it is
        // frozen, there is no reason to animate and it can cause strange
        // artifacts when we unfreeze the display if some different animation
        // is running.
        if (!mDisplayFrozen) {
            int anim = mPolicy.selectAnimationLw(win, transit);
            int attr = -1;
            Animation a = null;
            if (anim != 0) {
                a = AnimationUtils.loadAnimation(mContext, anim);
            } else {
                switch (transit) {
                    case WindowManagerPolicy.TRANSIT_ENTER:
                        attr = com.android.internal.R.styleable.WindowAnimation_windowEnterAnimation;
                        break;
                    case WindowManagerPolicy.TRANSIT_EXIT:
                        attr = com.android.internal.R.styleable.WindowAnimation_windowExitAnimation;
                        break;
                    case WindowManagerPolicy.TRANSIT_SHOW:
                        attr = com.android.internal.R.styleable.WindowAnimation_windowShowAnimation;
                        break;
                    case WindowManagerPolicy.TRANSIT_HIDE:
                        attr = com.android.internal.R.styleable.WindowAnimation_windowHideAnimation;
                        break;
                }
                if (attr >= 0) {
                    a = loadAnimation(win.mAttrs, attr);
                }
            }
            if (DEBUG_ANIM) Log.v(TAG, "applyAnimation: win=" + win
                    + " anim=" + anim + " attr=0x" + Integer.toHexString(attr)
                    + " mAnimation=" + win.mAnimation
                    + " isEntrance=" + isEntrance);
            if (a != null) {
                if (DEBUG_ANIM) {
                    RuntimeException e = new RuntimeException();
                    e.fillInStackTrace();
                    Log.v(TAG, "Loaded animation " + a + " for " + win, e);
                }
                win.setAnimation(a);
            }
        } else {
            win.clearAnimation();
        }

        return win.mAnimation != null;
    }

    private Animation loadAnimation(WindowManager.LayoutParams lp, int animAttr) {
        int anim = 0;
        Context context = mContext;
        if (animAttr >= 0) {
            AttributeCache.Entry ent = getCachedAnimations(lp);
            if (ent != null) {
                context = ent.context;
                anim = ent.array.getResourceId(animAttr, 0);
            }
        }
        if (anim != 0) {
            return AnimationUtils.loadAnimation(context, anim);
        }
        return null;
    }
    
    private boolean applyAnimationLocked(AppWindowToken wtoken,
            WindowManager.LayoutParams lp, int transit, boolean enter) {
        // Only apply an animation if the display isn't frozen.  If it is
        // frozen, there is no reason to animate and it can cause strange
        // artifacts when we unfreeze the display if some different animation
        // is running.
        if (!mDisplayFrozen) {
            int animAttr = 0;
            switch (transit) {
                case WindowManagerPolicy.TRANSIT_ACTIVITY_OPEN:
                    animAttr = enter
                            ? com.android.internal.R.styleable.WindowAnimation_activityOpenEnterAnimation
                            : com.android.internal.R.styleable.WindowAnimation_activityOpenExitAnimation;
                    break;
                case WindowManagerPolicy.TRANSIT_ACTIVITY_CLOSE:
                    animAttr = enter
                            ? com.android.internal.R.styleable.WindowAnimation_activityCloseEnterAnimation
                            : com.android.internal.R.styleable.WindowAnimation_activityCloseExitAnimation;
                    break;
                case WindowManagerPolicy.TRANSIT_TASK_OPEN:
                    animAttr = enter
                            ? com.android.internal.R.styleable.WindowAnimation_taskOpenEnterAnimation
                            : com.android.internal.R.styleable.WindowAnimation_taskOpenExitAnimation;
                    break;
                case WindowManagerPolicy.TRANSIT_TASK_CLOSE:
                    animAttr = enter
                            ? com.android.internal.R.styleable.WindowAnimation_taskCloseEnterAnimation
                            : com.android.internal.R.styleable.WindowAnimation_taskCloseExitAnimation;
                    break;
                case WindowManagerPolicy.TRANSIT_TASK_TO_FRONT:
                    animAttr = enter
                            ? com.android.internal.R.styleable.WindowAnimation_taskToFrontEnterAnimation
                            : com.android.internal.R.styleable.WindowAnimation_taskToFrontExitAnimation;
                    break;
                case WindowManagerPolicy.TRANSIT_TASK_TO_BACK:
                    animAttr = enter
                            ? com.android.internal.R.styleable.WindowAnimation_taskToBackEnterAnimation
                            : com.android.internal.R.styleable.WindowAnimation_taskToBackExitAnimation;
                    break;
            }
            Animation a = loadAnimation(lp, animAttr);
            if (DEBUG_ANIM) Log.v(TAG, "applyAnimation: wtoken=" + wtoken
                    + " anim=" + a
                    + " animAttr=0x" + Integer.toHexString(animAttr)
                    + " transit=" + transit);
            if (a != null) {
                if (DEBUG_ANIM) {
                    RuntimeException e = new RuntimeException();
                    e.fillInStackTrace();
                    Log.v(TAG, "Loaded animation " + a + " for " + wtoken, e);
                }
                wtoken.setAnimation(a);
            }
        } else {
            wtoken.clearAnimation();
        }

        return wtoken.animation != null;
    }

    // -------------------------------------------------------------
    // Application Window Tokens
    // -------------------------------------------------------------

    public void validateAppTokens(List tokens) {
        int v = tokens.size()-1;
        int m = mAppTokens.size()-1;
        while (v >= 0 && m >= 0) {
            AppWindowToken wtoken = mAppTokens.get(m);
            if (wtoken.removed) {
                m--;
                continue;
            }
            if (tokens.get(v) != wtoken.token) {
                Log.w(TAG, "Tokens out of sync: external is " + tokens.get(v)
                      + " @ " + v + ", internal is " + wtoken.token + " @ " + m);
            }
            v--;
            m--;
        }
        while (v >= 0) {
            Log.w(TAG, "External token not found: " + tokens.get(v) + " @ " + v);
            v--;
        }
        while (m >= 0) {
            AppWindowToken wtoken = mAppTokens.get(m);
            if (!wtoken.removed) {
                Log.w(TAG, "Invalid internal token: " + wtoken.token + " @ " + m);
            }
            m--;
        }
    }

    boolean checkCallingPermission(String permission, String func) {
        // Quick check: if the calling permission is me, it's all okay.
        if (Binder.getCallingPid() == Process.myPid()) {
            return true;
        }
        
        if (mContext.checkCallingPermission(permission)
                == PackageManager.PERMISSION_GRANTED) {
            return true;
        }
        String msg = "Permission Denial: " + func + " from pid="
                + Binder.getCallingPid()
                + ", uid=" + Binder.getCallingUid()
                + " requires " + permission;
        Log.w(TAG, msg);
        return false;
    }
    
    AppWindowToken findAppWindowToken(IBinder token) {
        WindowToken wtoken = mTokenMap.get(token);
        if (wtoken == null) {
            return null;
        }
        return wtoken.appWindowToken;
    }
    
    public void addAppToken(int addPos, IApplicationToken token,
            int groupId, int requestedOrientation, boolean fullscreen) {
        if (!checkCallingPermission(android.Manifest.permission.MANAGE_APP_TOKENS,
                "addAppToken()")) {
            return;
        }
        
        synchronized(mWindowMap) {
            AppWindowToken wtoken = findAppWindowToken(token.asBinder());
            if (wtoken != null) {
                Log.w(TAG, "Attempted to add existing app token: " + token);
                return;
            }
            wtoken = new AppWindowToken(token);
            wtoken.groupId = groupId;
            wtoken.appFullscreen = fullscreen;
            wtoken.requestedOrientation = requestedOrientation;
            mAppTokens.add(addPos, wtoken);
            if (Config.LOGV) Log.v(TAG, "Adding new app token: " + wtoken);
            mTokenMap.put(token.asBinder(), wtoken);
            mTokenList.add(wtoken);
            
            // Application tokens start out hidden.
            wtoken.hidden = true;
            wtoken.hiddenRequested = true;
            
            //dump();
        }
    }
   
    public void setAppGroupId(IBinder token, int groupId) {
        if (!checkCallingPermission(android.Manifest.permission.MANAGE_APP_TOKENS,
                "setAppStartingIcon()")) {
            return;
        }

        synchronized(mWindowMap) {
            AppWindowToken wtoken = findAppWindowToken(token);
            if (wtoken == null) {
                Log.w(TAG, "Attempted to set group id of non-existing app token: " + token);
                return;
            }
            wtoken.groupId = groupId;
        }
    }
    
    public Configuration updateOrientationFromAppTokens(
            IBinder freezeThisOneIfNeeded) {
        boolean changed = false;
        synchronized(mWindowMap) {
            int pos = mAppTokens.size() - 1;
            int req = ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED;
            int curGroup = 0;
            int lastOrientation = ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED;
            boolean haveGroup = false;
            while (pos >= 0) {
                AppWindowToken wtoken = mAppTokens.get(pos);
                pos--;
                if (!haveGroup) {
                    // We ignore any hidden applications on the top.
                    if (wtoken.hiddenRequested || wtoken.willBeHidden) {
                        continue;
                    }
                    haveGroup = true;
                    curGroup = wtoken.groupId;
                    lastOrientation = wtoken.requestedOrientation;
                } else if (curGroup != wtoken.groupId) {
                    // If we have hit a new application group, and the bottom
                    // of the previous group didn't explicitly say to use
                    // the orientation behind it, then we'll stick with the
                    // user's orientation.
                    if (lastOrientation != ActivityInfo.SCREEN_ORIENTATION_BEHIND) {
                        break;
                    }
                }
                int or = wtoken.requestedOrientation;
                // If this application has requested an explicit orientation,
                // then use it.
                if (or == ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE ||
                        or == ActivityInfo.SCREEN_ORIENTATION_PORTRAIT ||
                        or == ActivityInfo.SCREEN_ORIENTATION_SENSOR ||
                        or == ActivityInfo.SCREEN_ORIENTATION_NOSENSOR ||
                        or == ActivityInfo.SCREEN_ORIENTATION_USER) {
                    req = or;
                    break;
                }
            }
            if (req != mForcedAppOrientation) {
                changed = true;
                mForcedAppOrientation = req;
                //send a message to Policy indicating orientation change to take
                //action like disabling/enabling sensors etc.,
                mPolicy.setCurrentOrientation(req);
            }
            
            if (changed) {
                changed = setRotationUncheckedLocked(
                        WindowManagerPolicy.USE_LAST_ROTATION);
                if (changed) {
                    if (freezeThisOneIfNeeded != null) {
                        AppWindowToken wtoken = findAppWindowToken(
                                freezeThisOneIfNeeded);
                        if (wtoken != null) {
                            startAppFreezingScreenLocked(wtoken,
                                    ActivityInfo.CONFIG_ORIENTATION);
                        }
                    }
                    Configuration config = computeNewConfigurationLocked();
                    if (config != null) {
                        mLayoutNeeded = true;
                        performLayoutAndPlaceSurfacesLocked();
                    }
                    return config;
                }
            }
        }
        
        return null;
    }
    
    public void setAppOrientation(IApplicationToken token, int requestedOrientation) {
        if (!checkCallingPermission(android.Manifest.permission.MANAGE_APP_TOKENS,
                "setAppOrientation()")) {
            return;
        }
        
        synchronized(mWindowMap) {
            AppWindowToken wtoken = findAppWindowToken(token.asBinder());
            if (wtoken == null) {
                Log.w(TAG, "Attempted to set orientation of non-existing app token: " + token);
                return;
            }
            
            wtoken.requestedOrientation = requestedOrientation;
        }
    }
    
    public int getAppOrientation(IApplicationToken token) {
        synchronized(mWindowMap) {
            AppWindowToken wtoken = findAppWindowToken(token.asBinder());
            if (wtoken == null) {
                return ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED;
            }
            
            return wtoken.requestedOrientation;
        }
    }
    
    public void setFocusedApp(IBinder token, boolean moveFocusNow) {
        if (!checkCallingPermission(android.Manifest.permission.MANAGE_APP_TOKENS,
                "setFocusedApp()")) {
            return;
        }

        synchronized(mWindowMap) {
            boolean changed = false;
            if (token == null) {
                if (DEBUG_FOCUS) Log.v(TAG, "Clearing focused app, was " + mFocusedApp);
                changed = mFocusedApp != null;
                mFocusedApp = null;
                mKeyWaiter.tickle();
            } else {
                AppWindowToken newFocus = findAppWindowToken(token);
                if (newFocus == null) {
                    Log.w(TAG, "Attempted to set focus to non-existing app token: " + token);
                    return;
                }
                changed = mFocusedApp != newFocus;
                mFocusedApp = newFocus;
                if (DEBUG_FOCUS) Log.v(TAG, "Set focused app to: " + mFocusedApp);
                mKeyWaiter.tickle();
            }

            if (moveFocusNow && changed) {
                final long origId = Binder.clearCallingIdentity();
                updateFocusedWindowLocked();
                Binder.restoreCallingIdentity(origId);
            }
        }
    }

    public void prepareAppTransition(int transit) {
        if (!checkCallingPermission(android.Manifest.permission.MANAGE_APP_TOKENS,
                "prepareAppTransition()")) {
            return;
        }
        
        synchronized(mWindowMap) {
            if (DEBUG_APP_TRANSITIONS) Log.v(
                    TAG, "Prepare app transition: transit=" + transit
                    + " mNextAppTransition=" + mNextAppTransition);
            if (!mDisplayFrozen) {
                if (mNextAppTransition == WindowManagerPolicy.TRANSIT_NONE) {
                    mNextAppTransition = transit;
                }
                mAppTransitionReady = false;
                mAppTransitionTimeout = false;
                mStartingIconInTransition = false;
                mSkipAppTransitionAnimation = false;
                mH.removeMessages(H.APP_TRANSITION_TIMEOUT);
                mH.sendMessageDelayed(mH.obtainMessage(H.APP_TRANSITION_TIMEOUT),
                        5000);
            }
        }
    }

    public void executeAppTransition() {
        if (!checkCallingPermission(android.Manifest.permission.MANAGE_APP_TOKENS,
                "executeAppTransition()")) {
            return;
        }
        
        synchronized(mWindowMap) {
            if (DEBUG_APP_TRANSITIONS) Log.v(
                    TAG, "Execute app transition: mNextAppTransition=" + mNextAppTransition);
            if (mNextAppTransition != WindowManagerPolicy.TRANSIT_NONE) {
                mAppTransitionReady = true;
                final long origId = Binder.clearCallingIdentity();
                performLayoutAndPlaceSurfacesLocked();
                Binder.restoreCallingIdentity(origId);
            }
        }
    }

    public void setAppStartingWindow(IBinder token, String pkg,
            int theme, CharSequence nonLocalizedLabel, int labelRes, int icon,
            IBinder transferFrom, boolean createIfNeeded) {
        if (!checkCallingPermission(android.Manifest.permission.MANAGE_APP_TOKENS,
                "setAppStartingIcon()")) {
            return;
        }

        synchronized(mWindowMap) {
            if (DEBUG_STARTING_WINDOW) Log.v(
                    TAG, "setAppStartingIcon: token=" + token + " pkg=" + pkg
                    + " transferFrom=" + transferFrom);
            
            AppWindowToken wtoken = findAppWindowToken(token);
            if (wtoken == null) {
                Log.w(TAG, "Attempted to set icon of non-existing app token: " + token);
                return;
            }

            // If the display is frozen, we won't do anything until the
            // actual window is displayed so there is no reason to put in
            // the starting window.
            if (mDisplayFrozen) {
                return;
            }
            
            if (wtoken.startingData != null) {
                return;
            }
            
            if (transferFrom != null) {
                AppWindowToken ttoken = findAppWindowToken(transferFrom);
                if (ttoken != null) {
                    WindowState startingWindow = ttoken.startingWindow;
                    if (startingWindow != null) {
                        if (mStartingIconInTransition) {
                            // In this case, the starting icon has already
                            // been displayed, so start letting windows get
                            // shown immediately without any more transitions.
                            mSkipAppTransitionAnimation = true;
                        }
                        if (DEBUG_STARTING_WINDOW) Log.v(TAG,
                                "Moving existing starting from " + ttoken
                                + " to " + wtoken);
                        final long origId = Binder.clearCallingIdentity();
                        
                        // Transfer the starting window over to the new
                        // token.
                        wtoken.startingData = ttoken.startingData;
                        wtoken.startingView = ttoken.startingView;
                        wtoken.startingWindow = startingWindow;
                        ttoken.startingData = null;
                        ttoken.startingView = null;
                        ttoken.startingWindow = null;
                        ttoken.startingMoved = true;
                        startingWindow.mToken = wtoken;
                        startingWindow.mAppToken = wtoken;
                        mWindows.remove(startingWindow);
                        ttoken.windows.remove(startingWindow);
                        ttoken.allAppWindows.remove(startingWindow);
                        addWindowToListInOrderLocked(startingWindow);
                        wtoken.allAppWindows.add(startingWindow);
                        
                        // Propagate other interesting state between the
                        // tokens.  If the old token is displayed, we should
                        // immediately force the new one to be displayed.  If
                        // it is animating, we need to move that animation to
                        // the new one.
                        if (ttoken.allDrawn) {
                            wtoken.allDrawn = true;
                        }
                        if (ttoken.firstWindowDrawn) {
                            wtoken.firstWindowDrawn = true;
                        }
                        if (!ttoken.hidden) {
                            wtoken.hidden = false;
                            wtoken.hiddenRequested = false;
                            wtoken.willBeHidden = false;
                        }
                        if (wtoken.clientHidden != ttoken.clientHidden) {
                            wtoken.clientHidden = ttoken.clientHidden;
                            wtoken.sendAppVisibilityToClients();
                        }
                        if (ttoken.animation != null) {
                            wtoken.animation = ttoken.animation;
                            wtoken.animating = ttoken.animating;
                            wtoken.animLayerAdjustment = ttoken.animLayerAdjustment;
                            ttoken.animation = null;
                            ttoken.animLayerAdjustment = 0;
                            wtoken.updateLayers();
                            ttoken.updateLayers();
                        }
                        
                        assignLayersLocked();
                        mLayoutNeeded = true;
                        performLayoutAndPlaceSurfacesLocked();
                        updateFocusedWindowLocked();
                        Binder.restoreCallingIdentity(origId);
                        return;
                    } else if (ttoken.startingData != null) {
                        // The previous app was getting ready to show a
                        // starting window, but hasn't yet done so.  Steal it!
                        if (DEBUG_STARTING_WINDOW) Log.v(TAG,
                                "Moving pending starting from " + ttoken
                                + " to " + wtoken);
                        wtoken.startingData = ttoken.startingData;
                        ttoken.startingData = null;
                        ttoken.startingMoved = true;
                        Message m = mH.obtainMessage(H.ADD_STARTING, wtoken);
                        // Note: we really want to do sendMessageAtFrontOfQueue() because we
                        // want to process the message ASAP, before any other queued
                        // messages.
                        mH.sendMessageAtFrontOfQueue(m);
                        return;
                    }
                }
            }

            // There is no existing starting window, and the caller doesn't
            // want us to create one, so that's it!
            if (!createIfNeeded) {
                return;
            }
            
            mStartingIconInTransition = true;
            wtoken.startingData = new StartingData(
                    pkg, theme, nonLocalizedLabel,
                    labelRes, icon);
            Message m = mH.obtainMessage(H.ADD_STARTING, wtoken);
            // Note: we really want to do sendMessageAtFrontOfQueue() because we
            // want to process the message ASAP, before any other queued
            // messages.
            mH.sendMessageAtFrontOfQueue(m);
        }
    }

    public void setAppWillBeHidden(IBinder token) {
        if (!checkCallingPermission(android.Manifest.permission.MANAGE_APP_TOKENS,
                "setAppWillBeHidden()")) {
            return;
        }

        AppWindowToken wtoken;

        synchronized(mWindowMap) {
            wtoken = findAppWindowToken(token);
            if (wtoken == null) {
                Log.w(TAG, "Attempted to set will be hidden of non-existing app token: " + token);
                return;
            }
            wtoken.willBeHidden = true;
        }
    }
    
    boolean setTokenVisibilityLocked(AppWindowToken wtoken, WindowManager.LayoutParams lp,
            boolean visible, int transit, boolean performLayout) {
        boolean delayed = false;

        if (wtoken.clientHidden == visible) {
            wtoken.clientHidden = !visible;
            wtoken.sendAppVisibilityToClients();
        }
        
        wtoken.willBeHidden = false;
        if (wtoken.hidden == visible) {
            final int N = wtoken.allAppWindows.size();
            boolean changed = false;
            if (DEBUG_APP_TRANSITIONS) Log.v(
                TAG, "Changing app " + wtoken + " hidden=" + wtoken.hidden
                + " performLayout=" + performLayout);
            
            if (transit != WindowManagerPolicy.TRANSIT_NONE) {
                applyAnimationLocked(wtoken, lp, transit, visible);
                changed = true;
                if (wtoken.animation != null) {
                    delayed = true;
                }
            }
            
            for (int i=0; i<N; i++) {
                WindowState win = wtoken.allAppWindows.get(i);
                if (win == wtoken.startingWindow) {
                    continue;
                }

                if (win.isAnimating()) {
                    delayed = true;
                }
                
                //Log.i(TAG, "Window " + win + ": vis=" + win.isVisible());
                //win.dump("  ");
                if (visible) {
                    if (!win.isVisible()) {
                        changed = true;
                    }
                } else if (win.isVisible()) {
                    mKeyWaiter.finishedKey(win.mSession, win.mClient, true,
                            KeyWaiter.RETURN_NOTHING);
                    changed = true;
                }
            }

            wtoken.hidden = wtoken.hiddenRequested = !visible;
            if (!visible) {
                unsetAppFreezingScreenLocked(wtoken, true, true);
            } else {
                // If we are being set visible, and the starting window is
                // not yet displayed, then make sure it doesn't get displayed.
                WindowState swin = wtoken.startingWindow;
                if (swin != null && (swin.mDrawPending
                        || swin.mCommitDrawPending)) {
                    swin.mPolicyVisibility = false;
                 }
            }
            
            if (DEBUG_APP_TRANSITIONS) Log.v(TAG, "setTokenVisibilityLocked: " + wtoken
                      + ": hidden=" + wtoken.hidden + " hiddenRequested="
                      + wtoken.hiddenRequested);
            
            if (changed && performLayout) {
                mLayoutNeeded = true;
                performLayoutAndPlaceSurfacesLocked();
                updateFocusedWindowLocked();
            }
        }

        if (wtoken.animation != null) {
            delayed = true;
        }
        
        return delayed;
    }

    public void setAppVisibility(IBinder token, boolean visible) {
        if (!checkCallingPermission(android.Manifest.permission.MANAGE_APP_TOKENS,
                "setAppVisibility()")) {
            return;
        }

        AppWindowToken wtoken;

        synchronized(mWindowMap) {
            wtoken = findAppWindowToken(token);
            if (wtoken == null) {
                Log.w(TAG, "Attempted to set visibility of non-existing app token: " + token);
                return;
            }

            if (DEBUG_APP_TRANSITIONS || DEBUG_ORIENTATION) {
                RuntimeException e = new RuntimeException();
                e.fillInStackTrace();
                Log.v(TAG, "setAppVisibility(" + token + ", " + visible
                        + "): mNextAppTransition=" + mNextAppTransition
                        + " hidden=" + wtoken.hidden
                        + " hiddenRequested=" + wtoken.hiddenRequested, e);
            }
            
            // If we are preparing an app transition, then delay changing
            // the visibility of this token until we execute that transition.
            if (!mDisplayFrozen && mNextAppTransition != WindowManagerPolicy.TRANSIT_NONE) {
                // Already in requested state, don't do anything more.
                if (wtoken.hiddenRequested != visible) {
                    return;
                }
                wtoken.hiddenRequested = !visible;
                
                if (DEBUG_APP_TRANSITIONS) Log.v(
                        TAG, "Setting dummy animation on: " + wtoken);
                wtoken.setDummyAnimation();
                mOpeningApps.remove(wtoken);
                mClosingApps.remove(wtoken);
                wtoken.inPendingTransaction = true;
                if (visible) {
                    mOpeningApps.add(wtoken);
                    wtoken.allDrawn = false;
                    wtoken.startingDisplayed = false;
                    wtoken.startingMoved = false;
                    
                    if (wtoken.clientHidden) {
                        // In the case where we are making an app visible
                        // but holding off for a transition, we still need
                        // to tell the client to make its windows visible so
                        // they get drawn.  Otherwise, we will wait on
                        // performing the transition until all windows have
                        // been drawn, they never will be, and we are sad.
                        wtoken.clientHidden = false;
                        wtoken.sendAppVisibilityToClients();
                    }
                } else {
                    mClosingApps.add(wtoken);
                }
                return;
            }
            
            final long origId = Binder.clearCallingIdentity();
            setTokenVisibilityLocked(wtoken, null, visible, WindowManagerPolicy.TRANSIT_NONE, true);
            wtoken.updateReportedVisibilityLocked();
            Binder.restoreCallingIdentity(origId);
        }
    }

    void unsetAppFreezingScreenLocked(AppWindowToken wtoken,
            boolean unfreezeSurfaceNow, boolean force) {
        if (wtoken.freezingScreen) {
            if (DEBUG_ORIENTATION) Log.v(TAG, "Clear freezing of " + wtoken
                    + " force=" + force);
            final int N = wtoken.allAppWindows.size();
            boolean unfrozeWindows = false;
            for (int i=0; i<N; i++) {
                WindowState w = wtoken.allAppWindows.get(i);
                if (w.mAppFreezing) {
                    w.mAppFreezing = false;
                    if (w.mSurface != null && !w.mOrientationChanging) {
                        w.mOrientationChanging = true;
                    }
                    unfrozeWindows = true;
                }
            }
            if (force || unfrozeWindows) {
                if (DEBUG_ORIENTATION) Log.v(TAG, "No longer freezing: " + wtoken);
                wtoken.freezingScreen = false;
                mAppsFreezingScreen--;
            }
            if (unfreezeSurfaceNow) {
                if (unfrozeWindows) {
                    mLayoutNeeded = true;
                    performLayoutAndPlaceSurfacesLocked();
                }
                if (mAppsFreezingScreen == 0 && !mWindowsFreezingScreen) {
                    stopFreezingDisplayLocked();
                }
            }
        }
    }
    
    public void startAppFreezingScreenLocked(AppWindowToken wtoken,
            int configChanges) {
        if (DEBUG_ORIENTATION) {
            RuntimeException e = new RuntimeException();
            e.fillInStackTrace();
            Log.i(TAG, "Set freezing of " + wtoken.appToken
                    + ": hidden=" + wtoken.hidden + " freezing="
                    + wtoken.freezingScreen, e);
        }
        if (!wtoken.hiddenRequested) {
            if (!wtoken.freezingScreen) {
                wtoken.freezingScreen = true;
                mAppsFreezingScreen++;
                if (mAppsFreezingScreen == 1) {
                    startFreezingDisplayLocked();
                    mH.removeMessages(H.APP_FREEZE_TIMEOUT);
                    mH.sendMessageDelayed(mH.obtainMessage(H.APP_FREEZE_TIMEOUT),
                            5000);
                }
            }
            final int N = wtoken.allAppWindows.size();
            for (int i=0; i<N; i++) {
                WindowState w = wtoken.allAppWindows.get(i);
                w.mAppFreezing = true;
            }
        }
    }
    
    public void startAppFreezingScreen(IBinder token, int configChanges) {
        if (!checkCallingPermission(android.Manifest.permission.MANAGE_APP_TOKENS,
                "setAppFreezingScreen()")) {
            return;
        }

        synchronized(mWindowMap) {
            if (configChanges == 0 && !mDisplayFrozen) {
                if (DEBUG_ORIENTATION) Log.v(TAG, "Skipping set freeze of " + token);
                return;
            }
            
            AppWindowToken wtoken = findAppWindowToken(token);
            if (wtoken == null || wtoken.appToken == null) {
                Log.w(TAG, "Attempted to freeze screen with non-existing app token: " + wtoken);
                return;
            }
            final long origId = Binder.clearCallingIdentity();
            startAppFreezingScreenLocked(wtoken, configChanges);
            Binder.restoreCallingIdentity(origId);
        }
    }
    
    public void stopAppFreezingScreen(IBinder token, boolean force) {
        if (!checkCallingPermission(android.Manifest.permission.MANAGE_APP_TOKENS,
                "setAppFreezingScreen()")) {
            return;
        }

        synchronized(mWindowMap) {
            AppWindowToken wtoken = findAppWindowToken(token);
            if (wtoken == null || wtoken.appToken == null) {
                return;
            }
            final long origId = Binder.clearCallingIdentity();
            if (DEBUG_ORIENTATION) Log.v(TAG, "Clear freezing of " + token
                    + ": hidden=" + wtoken.hidden + " freezing=" + wtoken.freezingScreen);
            unsetAppFreezingScreenLocked(wtoken, true, force);
            Binder.restoreCallingIdentity(origId);
        }
    }
    
    public void removeAppToken(IBinder token) {
        if (!checkCallingPermission(android.Manifest.permission.MANAGE_APP_TOKENS,
                "removeAppToken()")) {
            return;
        }

        AppWindowToken wtoken = null;
        AppWindowToken startingToken = null;
        boolean delayed = false;

        final long origId = Binder.clearCallingIdentity();
        synchronized(mWindowMap) {
            WindowToken basewtoken = mTokenMap.remove(token);
            mTokenList.remove(basewtoken);
            if (basewtoken != null && (wtoken=basewtoken.appWindowToken) != null) {
                if (DEBUG_APP_TRANSITIONS) Log.v(TAG, "Removing app token: " + wtoken);
                delayed = setTokenVisibilityLocked(wtoken, null, false, WindowManagerPolicy.TRANSIT_NONE, true);
                wtoken.inPendingTransaction = false;
                mOpeningApps.remove(wtoken);
                if (mClosingApps.contains(wtoken)) {
                    delayed = true;
                } else if (mNextAppTransition != WindowManagerPolicy.TRANSIT_NONE) {
                    mClosingApps.add(wtoken);
                    delayed = true;
                }
                if (DEBUG_APP_TRANSITIONS) Log.v(
                        TAG, "Removing app " + wtoken + " delayed=" + delayed
                        + " animation=" + wtoken.animation
                        + " animating=" + wtoken.animating);
                if (delayed) {
                    mExitingAppTokens.add(wtoken);
                } else {
                    mAppTokens.remove(wtoken);
                }
                wtoken.removed = true;
                if (wtoken.startingData != null) {
                    startingToken = wtoken;
                }
                unsetAppFreezingScreenLocked(wtoken, true, true);
                if (mFocusedApp == wtoken) {
                    if (DEBUG_FOCUS) Log.v(TAG, "Removing focused app token:" + wtoken);
                    mFocusedApp = null;
                    updateFocusedWindowLocked();
                    mKeyWaiter.tickle();
                }
            } else {
                Log.w(TAG, "Attempted to remove non-existing app token: " + token);
            }
            
            if (!delayed && wtoken != null) {
                wtoken.updateReportedVisibilityLocked();
            }
        }
        Binder.restoreCallingIdentity(origId);

        if (startingToken != null) {
            if (DEBUG_STARTING_WINDOW) Log.v(TAG, "Schedule remove starting "
                    + startingToken + ": app token removed");
            Message m = mH.obtainMessage(H.REMOVE_STARTING, startingToken);
            mH.sendMessage(m);
        }
    }

    private boolean tmpRemoveAppWindowsLocked(WindowToken token) {
        final int NW = token.windows.size();
        for (int i=0; i<NW; i++) {
            WindowState win = token.windows.get(i);
            mWindows.remove(win);
            int j = win.mChildWindows.size();
            while (j > 0) {
                j--;
                mWindows.remove(win.mChildWindows.get(j));
            }
        }
        return NW > 0;
    }

    void dumpAppTokensLocked() {
        for (int i=mAppTokens.size()-1; i>=0; i--) {
            Log.v(TAG, "  #" + i + ": " + mAppTokens.get(i).token);
        }
    }
    
    void dumpWindowsLocked() {
        for (int i=mWindows.size()-1; i>=0; i--) {
            Log.v(TAG, "  #" + i + ": " + mWindows.get(i));
        }
    }
    
    private int findWindowOffsetLocked(int tokenPos) {
        final int NW = mWindows.size();

        if (tokenPos >= mAppTokens.size()) {
            int i = NW;
            while (i > 0) {
                i--;
                WindowState win = (WindowState)mWindows.get(i);
                if (win.getAppToken() != null) {
                    return i+1;
                }
            }
        }

        while (tokenPos > 0) {
            // Find the first app token below the new position that has
            // a window displayed.
            final AppWindowToken wtoken = mAppTokens.get(tokenPos-1);
            if (DEBUG_REORDER) Log.v(TAG, "Looking for lower windows @ "
                    + tokenPos + " -- " + wtoken.token);
            int i = wtoken.windows.size();
            while (i > 0) {
                i--;
                WindowState win = wtoken.windows.get(i);
                int j = win.mChildWindows.size();
                while (j > 0) {
                    j--;
                    WindowState cwin = (WindowState)win.mChildWindows.get(j);
                    if (cwin.mSubLayer >= 0 ) {
                        for (int pos=NW-1; pos>=0; pos--) {
                            if (mWindows.get(pos) == cwin) {
                                if (DEBUG_REORDER) Log.v(TAG,
                                        "Found child win @" + (pos+1));
                                return pos+1;
                            }
                        }
                    }
                }
                for (int pos=NW-1; pos>=0; pos--) {
                    if (mWindows.get(pos) == win) {
                        if (DEBUG_REORDER) Log.v(TAG, "Found win @" + (pos+1));
                        return pos+1;
                    }
                }
            }
            tokenPos--;
        }

        return 0;
    }

    private final int reAddAppWindowsLocked(int index, WindowToken token) {
        final int NW = token.windows.size();
        for (int i=0; i<NW; i++) {
            WindowState win = token.windows.get(i);
            final int NCW = win.mChildWindows.size();
            boolean added = false;
            for (int j=0; j<NCW; j++) {
                WindowState cwin = (WindowState)win.mChildWindows.get(j);
                if (cwin.mSubLayer >= 0) {
                    mWindows.add(index, win);
                    index++;
                    added = true;
                }
                mWindows.add(index, cwin);
                index++;
            }
            if (!added) {
                mWindows.add(index, win);
                index++;
            }
        }
        return index;
    }

    public void moveAppToken(int index, IBinder token) {
        if (!checkCallingPermission(android.Manifest.permission.MANAGE_APP_TOKENS,
                "moveAppToken()")) {
            return;
        }

        synchronized(mWindowMap) {
            if (DEBUG_REORDER) Log.v(TAG, "Initial app tokens:");
            if (DEBUG_REORDER) dumpAppTokensLocked();
            final AppWindowToken wtoken = findAppWindowToken(token);
            if (wtoken == null || !mAppTokens.remove(wtoken)) {
                Log.w(TAG, "Attempting to reorder token that doesn't exist: "
                      + token + " (" + wtoken + ")");
                return;
            }
            mAppTokens.add(index, wtoken);
            if (DEBUG_REORDER) Log.v(TAG, "Moved " + token + " to " + index + ":");
            if (DEBUG_REORDER) dumpAppTokensLocked();
            
            final long origId = Binder.clearCallingIdentity();
            if (DEBUG_REORDER) Log.v(TAG, "Removing windows in " + token + ":");
            if (DEBUG_REORDER) dumpWindowsLocked();
            if (tmpRemoveAppWindowsLocked(wtoken)) {
                if (DEBUG_REORDER) Log.v(TAG, "Adding windows back in:");
                if (DEBUG_REORDER) dumpWindowsLocked();
                reAddAppWindowsLocked(findWindowOffsetLocked(index), wtoken);
                if (DEBUG_REORDER) Log.v(TAG, "Final window list:");
                if (DEBUG_REORDER) dumpWindowsLocked();
                assignLayersLocked();
                mLayoutNeeded = true;
                performLayoutAndPlaceSurfacesLocked();
                updateFocusedWindowLocked();
            }
            Binder.restoreCallingIdentity(origId);
        }
    }

    private void removeAppTokensLocked(List<IBinder> tokens) {
        // XXX This should be done more efficiently!
        // (take advantage of the fact that both lists should be
        // ordered in the same way.)
        int N = tokens.size();
        for (int i=0; i<N; i++) {
            IBinder token = tokens.get(i);
            final AppWindowToken wtoken = findAppWindowToken(token);
            if (!mAppTokens.remove(wtoken)) {
                Log.w(TAG, "Attempting to reorder token that doesn't exist: "
                      + token + " (" + wtoken + ")");
                i--;
                N--;
            }
        }
    }

    private void moveAppWindowsLocked(List<IBinder> tokens, int tokenPos) {
        // First remove all of the windows from the list.
        final int N = tokens.size();
        int i;
        for (i=0; i<N; i++) {
            WindowToken token = mTokenMap.get(tokens.get(i));
            if (token != null) {
                tmpRemoveAppWindowsLocked(token);
            }
        }

        // Where to start adding?
        int pos = findWindowOffsetLocked(tokenPos);

        // And now add them back at the correct place.
        for (i=0; i<N; i++) {
            WindowToken token = mTokenMap.get(tokens.get(i));
            if (token != null) {
                pos = reAddAppWindowsLocked(pos, token);
            }
        }

        assignLayersLocked();
        mLayoutNeeded = true;
        performLayoutAndPlaceSurfacesLocked();
        updateFocusedWindowLocked();

        //dump();
    }

    public void moveAppTokensToTop(List<IBinder> tokens) {
        if (!checkCallingPermission(android.Manifest.permission.MANAGE_APP_TOKENS,
                "moveAppTokensToTop()")) {
            return;
        }

        final long origId = Binder.clearCallingIdentity();
        synchronized(mWindowMap) {
            removeAppTokensLocked(tokens);
            final int N = tokens.size();
            for (int i=0; i<N; i++) {
                AppWindowToken wt = findAppWindowToken(tokens.get(i));
                if (wt != null) {
                    mAppTokens.add(wt);
                }
            }
            moveAppWindowsLocked(tokens, mAppTokens.size());
        }
        Binder.restoreCallingIdentity(origId);
    }

    public void moveAppTokensToBottom(List<IBinder> tokens) {
        if (!checkCallingPermission(android.Manifest.permission.MANAGE_APP_TOKENS,
                "moveAppTokensToBottom()")) {
            return;
        }

        final long origId = Binder.clearCallingIdentity();
        synchronized(mWindowMap) {
            removeAppTokensLocked(tokens);
            final int N = tokens.size();
            int pos = 0;
            for (int i=0; i<N; i++) {
                AppWindowToken wt = findAppWindowToken(tokens.get(i));
                if (wt != null) {
                    mAppTokens.add(pos, wt);
                    pos++;
                }
            }
            moveAppWindowsLocked(tokens, 0);
        }
        Binder.restoreCallingIdentity(origId);
    }

    // -------------------------------------------------------------
    // Misc IWindowSession methods
    // -------------------------------------------------------------
    
    public void disableKeyguard(IBinder token, String tag) {
        if (mContext.checkCallingPermission(android.Manifest.permission.DISABLE_KEYGUARD)
            != PackageManager.PERMISSION_GRANTED) {
            throw new SecurityException("Requires DISABLE_KEYGUARD permission");
        }
        mKeyguardDisabled.acquire(token, tag);
    }

    public void reenableKeyguard(IBinder token) {
        if (mContext.checkCallingPermission(android.Manifest.permission.DISABLE_KEYGUARD)
            != PackageManager.PERMISSION_GRANTED) {
            throw new SecurityException("Requires DISABLE_KEYGUARD permission");
        }
        synchronized (mKeyguardDisabled) {
            mKeyguardDisabled.release(token);

            if (!mKeyguardDisabled.isAcquired()) {
                // if we are the last one to reenable the keyguard wait until
                // we have actaully finished reenabling until returning
                mWaitingUntilKeyguardReenabled = true;
                while (mWaitingUntilKeyguardReenabled) {
                    try {
                        mKeyguardDisabled.wait();
                    } catch (InterruptedException e) {
                        Thread.currentThread().interrupt();
                    }
                }
            }
        }
    }

    /**
     * @see android.app.KeyguardManager#exitKeyguardSecurely
     */
    public void exitKeyguardSecurely(final IOnKeyguardExitResult callback) {
        if (mContext.checkCallingPermission(android.Manifest.permission.DISABLE_KEYGUARD)
            != PackageManager.PERMISSION_GRANTED) {
            throw new SecurityException("Requires DISABLE_KEYGUARD permission");
        }
        mPolicy.exitKeyguardSecurely(new WindowManagerPolicy.OnKeyguardExitResult() {
            public void onKeyguardExitResult(boolean success) {
                try {
                    callback.onKeyguardExitResult(success);
                } catch (RemoteException e) {
                    // Client has died, we don't care.
                }
            }
        });
    }

    public boolean inKeyguardRestrictedInputMode() {
        return mPolicy.inKeyguardRestrictedKeyInputMode();
    }
    
    static float fixScale(float scale) {
        if (scale < 0) scale = 0;
        else if (scale > 20) scale = 20;
        return Math.abs(scale);
    }
    
    public void setAnimationScale(int which, float scale) {
        if (!checkCallingPermission(android.Manifest.permission.SET_ANIMATION_SCALE,
                "setAnimationScale()")) {
            return;
        }

        if (scale < 0) scale = 0;
        else if (scale > 20) scale = 20;
        scale = Math.abs(scale);
        switch (which) {
            case 0: mWindowAnimationScale = fixScale(scale); break;
            case 1: mTransitionAnimationScale = fixScale(scale); break;
        }
        
        // Persist setting
        mH.obtainMessage(H.PERSIST_ANIMATION_SCALE).sendToTarget();
    }
    
    public void setAnimationScales(float[] scales) {
        if (!checkCallingPermission(android.Manifest.permission.SET_ANIMATION_SCALE,
                "setAnimationScale()")) {
            return;
        }

        if (scales != null) {
            if (scales.length >= 1) {
                mWindowAnimationScale = fixScale(scales[0]);
            }
            if (scales.length >= 2) {
                mTransitionAnimationScale = fixScale(scales[1]);
            }
        }
        
        // Persist setting
        mH.obtainMessage(H.PERSIST_ANIMATION_SCALE).sendToTarget();
    }
    
    public float getAnimationScale(int which) {
        switch (which) {
            case 0: return mWindowAnimationScale;
            case 1: return mTransitionAnimationScale;
        }
        return 0;
    }
    
    public float[] getAnimationScales() {
        return new float[] { mWindowAnimationScale, mTransitionAnimationScale };
    }
    
    public int getSwitchState(int sw) {
        if (!checkCallingPermission(android.Manifest.permission.READ_INPUT_STATE,
                "getSwitchState()")) {
            return -1;
        }
        return KeyInputQueue.getSwitchState(sw);
    }
    
    public int getSwitchStateForDevice(int devid, int sw) {
        if (!checkCallingPermission(android.Manifest.permission.READ_INPUT_STATE,
                "getSwitchStateForDevice()")) {
            return -1;
        }
        return KeyInputQueue.getSwitchState(devid, sw);
    }
    
    public int getScancodeState(int sw) {
        if (!checkCallingPermission(android.Manifest.permission.READ_INPUT_STATE,
                "getScancodeState()")) {
            return -1;
        }
        return KeyInputQueue.getScancodeState(sw);
    }
    
    public int getScancodeStateForDevice(int devid, int sw) {
        if (!checkCallingPermission(android.Manifest.permission.READ_INPUT_STATE,
                "getScancodeStateForDevice()")) {
            return -1;
        }
        return KeyInputQueue.getScancodeState(devid, sw);
    }
    
    public int getKeycodeState(int sw) {
        if (!checkCallingPermission(android.Manifest.permission.READ_INPUT_STATE,
                "getKeycodeState()")) {
            return -1;
        }
        return KeyInputQueue.getKeycodeState(sw);
    }
    
    public int getKeycodeStateForDevice(int devid, int sw) {
        if (!checkCallingPermission(android.Manifest.permission.READ_INPUT_STATE,
                "getKeycodeStateForDevice()")) {
            return -1;
        }
        return KeyInputQueue.getKeycodeState(devid, sw);
    }
    
    public void enableScreenAfterBoot() {
        synchronized(mWindowMap) {
            if (mSystemBooted) {
                return;
            }
            mSystemBooted = true;
        }
        
        performEnableScreen();
    }
    
    public void enableScreenIfNeededLocked() {
        if (mDisplayEnabled) {
            return;
        }
        if (!mSystemBooted) {
            return;
        }
        mH.sendMessage(mH.obtainMessage(H.ENABLE_SCREEN));
    }
    
    public void performEnableScreen() {
        synchronized(mWindowMap) {
            if (mDisplayEnabled) {
                return;
            }
            if (!mSystemBooted) {
                return;
            }
            
            // Don't enable the screen until all existing windows
            // have been drawn.
            final int N = mWindows.size();
            for (int i=0; i<N; i++) {
                WindowState w = (WindowState)mWindows.get(i);
                if (w.isVisible() && !w.isDisplayedLw()) {
                    return;
                }
            }
            
            mDisplayEnabled = true;
            if (false) {
                Log.i(TAG, "ENABLING SCREEN!");
                StringWriter sw = new StringWriter();
                PrintWriter pw = new PrintWriter(sw);
                this.dump(null, pw, null);
                Log.i(TAG, sw.toString());
            }
            try {
                IBinder surfaceFlinger = ServiceManager.getService("SurfaceFlinger");
                if (surfaceFlinger != null) {
                    //Log.i(TAG, "******* TELLING SURFACE FLINGER WE ARE BOOTED!");
                    Parcel data = Parcel.obtain();
                    data.writeInterfaceToken("android.ui.ISurfaceComposer");
                    surfaceFlinger.transact(IBinder.FIRST_CALL_TRANSACTION,
                                            data, null, 0);
                    data.recycle();
                }
            } catch (RemoteException ex) {
                Log.e(TAG, "Boot completed: SurfaceFlinger is dead!");
            }
        }
        
        mPolicy.enableScreenAfterBoot();
        
        // Make sure the last requested orientation has been applied.
        setRotationUnchecked(WindowManagerPolicy.USE_LAST_ROTATION, false);
    }
    
    public void setInTouchMode(boolean mode) {
        synchronized(mWindowMap) {
            mInTouchMode = mode;
        }
    }

    public void setRotation(int rotation, 
            boolean alwaysSendConfiguration) {
        if (!checkCallingPermission(android.Manifest.permission.SET_ORIENTATION,
                "setOrientation()")) {
            return;
        }

        setRotationUnchecked(rotation, alwaysSendConfiguration);
    }
    
    public void setRotationUnchecked(int rotation, boolean alwaysSendConfiguration) {
        if(DEBUG_ORIENTATION) Log.v(TAG,
                "alwaysSendConfiguration set to "+alwaysSendConfiguration);
        
        long origId = Binder.clearCallingIdentity();
        boolean changed;
        synchronized(mWindowMap) {
            changed = setRotationUncheckedLocked(rotation);
        }
        
        if (changed) {
            sendNewConfiguration();
            synchronized(mWindowMap) {
                mLayoutNeeded = true;
                performLayoutAndPlaceSurfacesLocked();
            }
        } else if (alwaysSendConfiguration) {
            //update configuration ignoring orientation change
            sendNewConfiguration();
        }
        
        Binder.restoreCallingIdentity(origId);
    }
    
    public boolean setRotationUncheckedLocked(int rotation) {
        boolean changed;
        if (rotation == WindowManagerPolicy.USE_LAST_ROTATION) {
            rotation = mRequestedRotation;
        } else {
            mRequestedRotation = rotation;
        }
        if (DEBUG_ORIENTATION) Log.v(TAG, "Overwriting rotation value from "+rotation);
        rotation = mPolicy.rotationForOrientation(mForcedAppOrientation);
        if (DEBUG_ORIENTATION) Log.v(TAG, "new rotation is set to "+rotation);
        changed = mDisplayEnabled && mRotation != rotation;
        
        if (changed) {
            mRotation = rotation;
            if (DEBUG_ORIENTATION) Log.v(TAG, 
                    "Rotation changed to " + rotation
                    + " from " + mRotation
                    + " (forceApp=" + mForcedAppOrientation
                    + ", req=" + mRequestedRotation + ")");
            mWindowsFreezingScreen = true;
            mH.removeMessages(H.WINDOW_FREEZE_TIMEOUT);
            mH.sendMessageDelayed(mH.obtainMessage(H.WINDOW_FREEZE_TIMEOUT),
                    2000);
            startFreezingDisplayLocked();
            mQueue.setOrientation(rotation);
            if (mDisplayEnabled) {
                Surface.setOrientation(0, rotation);
            }
            for (int i=mWindows.size()-1; i>=0; i--) {
                WindowState w = (WindowState)mWindows.get(i);
                if (w.mSurface != null) {
                    w.mOrientationChanging = true;
                }
            }
            for (int i=mRotationWatchers.size()-1; i>=0; i--) {
                try {
                    mRotationWatchers.get(i).onRotationChanged(rotation);
                } catch (RemoteException e) {
                }
            }
        } //end if changed
        
        return changed;
    }
    
    public int getRotation() {
        return mRotation;
    }

    public int watchRotation(IRotationWatcher watcher) {
        final IBinder watcherBinder = watcher.asBinder();
        IBinder.DeathRecipient dr = new IBinder.DeathRecipient() {
            public void binderDied() {
                synchronized (mWindowMap) {
                    for (int i=0; i<mRotationWatchers.size(); i++) {
                        if (watcherBinder == mRotationWatchers.get(i).asBinder()) {
                            mRotationWatchers.remove(i);
                            i--;
                        }
                    }
                }
            }
        };
        
        synchronized (mWindowMap) {
            try {
                watcher.asBinder().linkToDeath(dr, 0);
                mRotationWatchers.add(watcher);
            } catch (RemoteException e) {
                // Client died, no cleanup needed.
            }
            
            return mRotation;
        }
    }

    /**
     * Starts the view server on the specified port.
     *
     * @param port The port to listener to.
     *
     * @return True if the server was successfully started, false otherwise.
     *
     * @see com.android.server.ViewServer
     * @see com.android.server.ViewServer#VIEW_SERVER_DEFAULT_PORT
     */
    public boolean startViewServer(int port) {
        if ("1".equals(SystemProperties.get(SYSTEM_SECURE, "0"))) {
            return false;
        }

        if (!checkCallingPermission(Manifest.permission.DUMP, "startViewServer")) {
            return false;
        }

        if (port < 1024) {
            return false;
        }

        if (mViewServer != null) {
            if (!mViewServer.isRunning()) {
                try {
                    return mViewServer.start();
                } catch (IOException e) {
                    Log.w(TAG, "View server did not start");                    
                }
            }
            return false;
        }

        try {
            mViewServer = new ViewServer(this, port);
            return mViewServer.start();
        } catch (IOException e) {
            Log.w(TAG, "View server did not start");
        }
        return false;
    }

    /**
     * Stops the view server if it exists.
     *
     * @return True if the server stopped, false if it wasn't started or
     *         couldn't be stopped.
     *
     * @see com.android.server.ViewServer
     */
    public boolean stopViewServer() {
        if ("1".equals(SystemProperties.get(SYSTEM_SECURE, "0"))) {
            return false;
        }

        if (!checkCallingPermission(Manifest.permission.DUMP, "stopViewServer")) {
            return false;
        }

        if (mViewServer != null) {
            return mViewServer.stop();
        }
        return false;
    }

    /**
     * Indicates whether the view server is running.
     *
     * @return True if the server is running, false otherwise.
     *
     * @see com.android.server.ViewServer
     */
    public boolean isViewServerRunning() {
        if ("1".equals(SystemProperties.get(SYSTEM_SECURE, "0"))) {
            return false;
        }

        if (!checkCallingPermission(Manifest.permission.DUMP, "isViewServerRunning")) {
            return false;
        }

        return mViewServer != null && mViewServer.isRunning();
    }

    /**
     * Lists all availble windows in the system. The listing is written in the
     * specified Socket's output stream with the following syntax:
     * windowHashCodeInHexadecimal windowName
     * Each line of the ouput represents a different window.
     *
     * @param client The remote client to send the listing to.
     * @return False if an error occured, true otherwise.
     */
    boolean viewServerListWindows(Socket client) {
        if ("1".equals(SystemProperties.get(SYSTEM_SECURE, "0"))) {
            return false;
        }

        boolean result = true;

        Object[] windows;
        synchronized (mWindowMap) {
            windows = new Object[mWindows.size()];
            //noinspection unchecked
            windows = mWindows.toArray(windows);
        }

        BufferedWriter out = null;

        // Any uncaught exception will crash the system process
        try {
            OutputStream clientStream = client.getOutputStream();
            out = new BufferedWriter(new OutputStreamWriter(clientStream), 8 * 1024);

            final int count = windows.length;
            for (int i = 0; i < count; i++) {
                final WindowState w = (WindowState) windows[i];
                out.write(Integer.toHexString(System.identityHashCode(w)));
                out.write(' ');
                out.append(w.mAttrs.getTitle());
                out.write('\n');
            }

            out.write("DONE.\n");
            out.flush();
        } catch (Exception e) {
            result = false;
        } finally {
            if (out != null) {
                try {
                    out.close();
                } catch (IOException e) {
                    result = false;
                }
            }
        }

        return result;
    }

    /**
     * Sends a command to a target window. The result of the command, if any, will be
     * written in the output stream of the specified socket.
     *
     * The parameters must follow this syntax:
     * windowHashcode extra
     *
     * Where XX is the length in characeters of the windowTitle.
     *
     * The first parameter is the target window. The window with the specified hashcode
     * will be the target. If no target can be found, nothing happens. The extra parameters
     * will be delivered to the target window and as parameters to the command itself.
     *
     * @param client The remote client to sent the result, if any, to.
     * @param command The command to execute.
     * @param parameters The command parameters.
     *
     * @return True if the command was successfully delivered, false otherwise. This does
     *         not indicate whether the command itself was successful.
     */
    boolean viewServerWindowCommand(Socket client, String command, String parameters) {
        if ("1".equals(SystemProperties.get(SYSTEM_SECURE, "0"))) {
            return false;
        }

        boolean success = true;
        Parcel data = null;
        Parcel reply = null;

        // Any uncaught exception will crash the system process
        try {
            // Find the hashcode of the window
            int index = parameters.indexOf(' ');
            if (index == -1) {
                index = parameters.length();
            }
            final String code = parameters.substring(0, index);
            int hashCode = "ffffffff".equals(code) ? -1 : Integer.parseInt(code, 16);

            // Extract the command's parameter after the window description
            if (index < parameters.length()) {
                parameters = parameters.substring(index + 1);
            } else {
                parameters = "";
            }

            final WindowManagerService.WindowState window = findWindow(hashCode);
            if (window == null) {
                return false;
            }

            data = Parcel.obtain();
            data.writeInterfaceToken("android.view.IWindow");
            data.writeString(command);
            data.writeString(parameters);
            data.writeInt(1);
            ParcelFileDescriptor.fromSocket(client).writeToParcel(data, 0);

            reply = Parcel.obtain();

            final IBinder binder = window.mClient.asBinder();
            // TODO: GET THE TRANSACTION CODE IN A SAFER MANNER
            binder.transact(IBinder.FIRST_CALL_TRANSACTION, data, reply, 0);

            reply.readException();

        } catch (Exception e) {
            Log.w(TAG, "Could not send command " + command + " with parameters " + parameters, e);
            success = false;
        } finally {
            if (data != null) {
                data.recycle();
            }
            if (reply != null) {
                reply.recycle();
            }
        }

        return success;
    }

    private WindowState findWindow(int hashCode) {
        if (hashCode == -1) {
            return getFocusedWindow();
        }

        synchronized (mWindowMap) {
            final ArrayList windows = mWindows;
            final int count = windows.size();

            for (int i = 0; i < count; i++) {
                WindowState w = (WindowState) windows.get(i);
                if (System.identityHashCode(w) == hashCode) {
                    return w;
                }
            }
        }

        return null;
    }

    void sendNewConfiguration() {
        Configuration config;
        synchronized (mWindowMap) {
            config = computeNewConfigurationLocked();
        }
        
        if (config != null) {
            try {
                mActivityManager.updateConfiguration(config);
            } catch (RemoteException e) {
            }
        }
    }
    
    Configuration computeNewConfigurationLocked() {
        synchronized (mWindowMap) {
            if (mDisplay == null) {
                return null;
            }
            Configuration config = new Configuration();
            mQueue.getInputConfiguration(config);
            final int dw = mDisplay.getWidth();
            final int dh = mDisplay.getHeight();
            int orientation = Configuration.ORIENTATION_SQUARE;
            if (dw < dh) {
                orientation = Configuration.ORIENTATION_PORTRAIT;
            } else if (dw > dh) {
                orientation = Configuration.ORIENTATION_LANDSCAPE;
            }
            config.orientation = orientation;
            config.keyboardHidden = Configuration.KEYBOARDHIDDEN_NO;
            mPolicy.adjustConfigurationLw(config);
            Log.i(TAG, "Input configuration changed: " + config);
            long now = SystemClock.uptimeMillis();
            //Log.i(TAG, "Config changing, gc pending: " + mFreezeGcPending + ", now " + now);
            if (mFreezeGcPending != 0) {
                if (now > (mFreezeGcPending+1000)) {
                    //Log.i(TAG, "Gc!  " + now + " > " + (mFreezeGcPending+1000));
                    mH.removeMessages(H.FORCE_GC);
                    Runtime.getRuntime().gc();
                    mFreezeGcPending = now;
                }
            } else {
                mFreezeGcPending = now;
            }
            return config;
        }
    }
    
    // -------------------------------------------------------------
    // Input Events and Focus Management
    // -------------------------------------------------------------

    private final void wakeupIfNeeded(WindowState targetWin, int eventType) {
        if (targetWin == null ||
                targetWin.mAttrs.type != WindowManager.LayoutParams.TYPE_KEYGUARD) {
            mPowerManager.userActivity(SystemClock.uptimeMillis(), false, eventType);
        }
    }

    // tells if it's a cheek event or not -- this function is stateful
    private static final int EVENT_NONE = 0;
    private static final int EVENT_UNKNOWN = 0;
    private static final int EVENT_CHEEK = 0;
    private static final int EVENT_IGNORE_DURATION = 300; // ms
    private static final float CHEEK_THRESHOLD = 0.6f;
    private int mEventState = EVENT_NONE;
    private float mEventSize;
    private int eventType(MotionEvent ev) {
        float size = ev.getSize();
        switch (ev.getAction()) {
        case MotionEvent.ACTION_DOWN:
            mEventSize = size;
            return (mEventSize > CHEEK_THRESHOLD) ? CHEEK_EVENT : TOUCH_EVENT;
        case MotionEvent.ACTION_UP:
            if (size > mEventSize) mEventSize = size;
            return (mEventSize > CHEEK_THRESHOLD) ? CHEEK_EVENT : OTHER_EVENT;
        case MotionEvent.ACTION_MOVE:
            final int N = ev.getHistorySize();
            if (size > mEventSize) mEventSize = size;
            if (mEventSize > CHEEK_THRESHOLD) return CHEEK_EVENT;
            for (int i=0; i<N; i++) {
                size = ev.getHistoricalSize(i);
                if (size > mEventSize) mEventSize = size;
                if (mEventSize > CHEEK_THRESHOLD) return CHEEK_EVENT;
            }
            if (ev.getEventTime() < ev.getDownTime() + EVENT_IGNORE_DURATION) {
                return TOUCH_EVENT;
            } else {
                return OTHER_EVENT;
            }
        default:
            // not good
            return OTHER_EVENT;
        }
    }

    /**
     * @return Returns true if event was dispatched, false if it was dropped for any reason
     */
    private boolean dispatchPointer(QueuedEvent qev, MotionEvent ev, int pid, int uid) {
        if (DEBUG_INPUT || WindowManagerPolicy.WATCH_POINTER) Log.v(TAG,
                "dispatchPointer " + ev);

        Object targetObj = mKeyWaiter.waitForNextEventTarget(null, qev,
                ev, true, false);
        
        int action = ev.getAction();
        
        if (action == MotionEvent.ACTION_UP) {
            // let go of our target
            mKeyWaiter.mMotionTarget = null;
            mPowerManager.logPointerUpEvent();
        } else if (action == MotionEvent.ACTION_DOWN) {
            mPowerManager.logPointerDownEvent();
        }

        if (targetObj == null) {
            // In this case we are either dropping the event, or have received
            // a move or up without a down.  It is common to receive move
            // events in such a way, since this means the user is moving the
            // pointer without actually pressing down.  All other cases should
            // be atypical, so let's log them.
            if (ev.getAction() != MotionEvent.ACTION_MOVE) {
                Log.w(TAG, "No window to dispatch pointer action " + ev.getAction());
            }
            if (qev != null) {
                mQueue.recycleEvent(qev);
            }
            ev.recycle();
            return false;
        }
        if (targetObj == mKeyWaiter.CONSUMED_EVENT_TOKEN) {
            if (qev != null) {
                mQueue.recycleEvent(qev);
            }
            ev.recycle();
            return true;
        }
        
        WindowState target = (WindowState)targetObj;
        
        final long eventTime = ev.getEventTime();
        
        //Log.i(TAG, "Sending " + ev + " to " + target);

        if (uid != 0 && uid != target.mSession.mUid) {
            if (mContext.checkPermission(
                    android.Manifest.permission.INJECT_EVENTS, pid, uid)
                    != PackageManager.PERMISSION_GRANTED) {
                Log.w(TAG, "Permission denied: injecting pointer event from pid "
                        + pid + " uid " + uid + " to window " + target
                        + " owned by uid " + target.mSession.mUid);
                if (qev != null) {
                    mQueue.recycleEvent(qev);
                }
                ev.recycle();
                return false;
            }
        }
        
        if ((target.mAttrs.flags & 
                        WindowManager.LayoutParams.FLAG_IGNORE_CHEEK_PRESSES) != 0) {
            //target wants to ignore fat touch events
            boolean cheekPress = mPolicy.isCheekPressedAgainstScreen(ev);
            //explicit flag to return without processing event further
            boolean returnFlag = false;
            if((action == MotionEvent.ACTION_DOWN)) {
                mFatTouch = false;
                if(cheekPress) {
                    mFatTouch = true;
                    returnFlag = true;
                }
            } else {
                if(action == MotionEvent.ACTION_UP) {
                    if(mFatTouch) {
                        //earlier even was invalid doesnt matter if current up is cheekpress or not
                        mFatTouch = false;
                        returnFlag = true;
                    } else if(cheekPress) {
                        //cancel the earlier event
                        ev.setAction(MotionEvent.ACTION_CANCEL);
                        action = MotionEvent.ACTION_CANCEL;
                    }
                } else if(action == MotionEvent.ACTION_MOVE) {
                    if(mFatTouch) {
                        //two cases here
                        //an invalid down followed by 0 or moves(valid or invalid)
                        //a valid down,  invalid move, more moves. want to ignore till up 
                        returnFlag = true;
                    } else if(cheekPress) {
                        //valid down followed by invalid moves
                        //an invalid move have to cancel earlier action
                        ev.setAction(MotionEvent.ACTION_CANCEL);
                        action = MotionEvent.ACTION_CANCEL;
                        if (DEBUG_INPUT) Log.v(TAG, "Sending cancel for invalid ACTION_MOVE");
                        //note that the subsequent invalid moves will not get here
                        mFatTouch = true;
                    }
                }
            } //else if action
            if(returnFlag) {
                //recycle que, ev
                if (qev != null) {
                    mQueue.recycleEvent(qev);
                }
                ev.recycle();
                return false;
            }
        } //end if target
        
        synchronized(mWindowMap) {
            if (qev != null && action == MotionEvent.ACTION_MOVE) {
                mKeyWaiter.bindTargetWindowLocked(target,
                        KeyWaiter.RETURN_PENDING_POINTER, qev);
                ev = null;
            } else {
                final Rect frame = target.mFrame;
                ev.offsetLocation(-(float)frame.left, -(float)frame.top);
                mKeyWaiter.bindTargetWindowLocked(target);
            }
        }
        
        // finally offset the event to the target's coordinate system and
        // dispatch the event.
        try {
            if (DEBUG_INPUT || DEBUG_FOCUS || WindowManagerPolicy.WATCH_POINTER) {
                Log.v(TAG, "Delivering pointer " + qev + " to " + target);
            }
            target.mClient.dispatchPointer(ev, eventTime);
            return true;
        } catch (android.os.RemoteException e) {
            Log.i(TAG, "WINDOW DIED during motion dispatch: " + target);
            mKeyWaiter.mMotionTarget = null;
            try {
                removeWindow(target.mSession, target.mClient);
            } catch (java.util.NoSuchElementException ex) {
                // This will happen if the window has already been
                // removed.
            }
        }
        return false;
    }
    
    /**
     * @return Returns true if event was dispatched, false if it was dropped for any reason
     */
    private boolean dispatchTrackball(QueuedEvent qev, MotionEvent ev, int pid, int uid) {
        if (DEBUG_INPUT) Log.v(
                TAG, "dispatchTrackball [" + ev.getAction() +"] <" + ev.getX() + ", " + ev.getY() + ">");
        
        Object focusObj = mKeyWaiter.waitForNextEventTarget(null, qev,
                ev, false, false);
        if (focusObj == null) {
            Log.w(TAG, "No focus window, dropping trackball: " + ev);
            if (qev != null) {
                mQueue.recycleEvent(qev);
            }
            ev.recycle();
            return false;
        }
        if (focusObj == mKeyWaiter.CONSUMED_EVENT_TOKEN) {
            if (qev != null) {
                mQueue.recycleEvent(qev);
            }
            ev.recycle();
            return true;
        }
        
        WindowState focus = (WindowState)focusObj;
        
        if (uid != 0 && uid != focus.mSession.mUid) {
            if (mContext.checkPermission(
                    android.Manifest.permission.INJECT_EVENTS, pid, uid)
                    != PackageManager.PERMISSION_GRANTED) {
                Log.w(TAG, "Permission denied: injecting key event from pid "
                        + pid + " uid " + uid + " to window " + focus
                        + " owned by uid " + focus.mSession.mUid);
                if (qev != null) {
                    mQueue.recycleEvent(qev);
                }
                ev.recycle();
                return false;
            }
        }
        
        final long eventTime = ev.getEventTime();
        
        synchronized(mWindowMap) {
            if (qev != null && ev.getAction() == MotionEvent.ACTION_MOVE) {
                mKeyWaiter.bindTargetWindowLocked(focus,
                        KeyWaiter.RETURN_PENDING_TRACKBALL, qev);
                // We don't deliver movement events to the client, we hold
                // them and wait for them to call back.
                ev = null;
            } else {
                mKeyWaiter.bindTargetWindowLocked(focus);
            }
        }
        
        try {
            focus.mClient.dispatchTrackball(ev, eventTime);
            return true;
        } catch (android.os.RemoteException e) {
            Log.i(TAG, "WINDOW DIED during key dispatch: " + focus);
            try {
                removeWindow(focus.mSession, focus.mClient);
            } catch (java.util.NoSuchElementException ex) {
                // This will happen if the window has already been
                // removed.
            }
        }
        
        return false;
    }
    
    /**
     * @return Returns true if event was dispatched, false if it was dropped for any reason
     */
    private boolean dispatchKey(KeyEvent event, int pid, int uid) {
        if (DEBUG_INPUT) Log.v(TAG, "Dispatch key: " + event);

        Object focusObj = mKeyWaiter.waitForNextEventTarget(event, null,
                null, false, false);
        if (focusObj == null) {
            Log.w(TAG, "No focus window, dropping: " + event);
            return false;
        }
        if (focusObj == mKeyWaiter.CONSUMED_EVENT_TOKEN) {
            return true;
        }
        
        WindowState focus = (WindowState)focusObj;
        
        if (DEBUG_INPUT) Log.v(
            TAG, "Dispatching to " + focus + ": " + event);

        if (uid != 0 && uid != focus.mSession.mUid) {
            if (mContext.checkPermission(
                    android.Manifest.permission.INJECT_EVENTS, pid, uid)
                    != PackageManager.PERMISSION_GRANTED) {
                Log.w(TAG, "Permission denied: injecting key event from pid "
                        + pid + " uid " + uid + " to window " + focus
                        + " owned by uid " + focus.mSession.mUid);
                return false;
            }
        }
        
        synchronized(mWindowMap) {
            mKeyWaiter.bindTargetWindowLocked(focus);
        }
        
        try {
            if (DEBUG_INPUT || DEBUG_FOCUS) {
                Log.v(TAG, "Delivering key " + event.getKeyCode()
                        + " to " + focus);
            }
            focus.mClient.dispatchKey(event);
            return true;
        } catch (android.os.RemoteException e) {
            Log.i(TAG, "WINDOW DIED during key dispatch: " + focus);
            try {
                removeWindow(focus.mSession, focus.mClient);
            } catch (java.util.NoSuchElementException ex) {
                // This will happen if the window has already been
                // removed.
            }
        }
        
        return false;
    }
    
    public void pauseKeyDispatching(IBinder _token) {
        if (!checkCallingPermission(android.Manifest.permission.MANAGE_APP_TOKENS,
                "pauseKeyDispatching()")) {
            return;
        }

        synchronized (mWindowMap) {
            WindowToken token = mTokenMap.get(_token);
            if (token != null) {
                mKeyWaiter.pauseDispatchingLocked(token);
            }
        }
    }

    public void resumeKeyDispatching(IBinder _token) {
        if (!checkCallingPermission(android.Manifest.permission.MANAGE_APP_TOKENS,
                "resumeKeyDispatching()")) {
            return;
        }

        synchronized (mWindowMap) {
            WindowToken token = mTokenMap.get(_token);
            if (token != null) {
                mKeyWaiter.resumeDispatchingLocked(token);
            }
        }
    }

    public void setEventDispatching(boolean enabled) {
        if (!checkCallingPermission(android.Manifest.permission.MANAGE_APP_TOKENS,
                "resumeKeyDispatching()")) {
            return;
        }

        synchronized (mWindowMap) {
            mKeyWaiter.setEventDispatchingLocked(enabled);
        }
    }
    
    /**
     * Injects a keystroke event into the UI.
     * 
     * @param ev A motion event describing the keystroke action.  (Be sure to use 
     * {@link SystemClock#uptimeMillis()} as the timebase.)
     * @param sync If true, wait for the event to be completed before returning to the caller.
     * @return Returns true if event was dispatched, false if it was dropped for any reason
     */
    public boolean injectKeyEvent(KeyEvent ev, boolean sync) {
        long downTime = ev.getDownTime();
        long eventTime = ev.getEventTime();

        int action = ev.getAction();
        int code = ev.getKeyCode();
        int repeatCount = ev.getRepeatCount();
        int metaState = ev.getMetaState();
        int deviceId = ev.getDeviceId();
        int scancode = ev.getScanCode();

        if (eventTime == 0) eventTime = SystemClock.uptimeMillis();
        if (downTime == 0) downTime = eventTime;

        KeyEvent newEvent = new KeyEvent(downTime, eventTime, action, code, repeatCount, metaState,
                deviceId, scancode);

        boolean result = dispatchKey(newEvent, Binder.getCallingPid(), Binder.getCallingUid());
        if (sync) {
            mKeyWaiter.waitForNextEventTarget(null, null, null, false, true);
        }
        return result;
    }

    /**
     * Inject a pointer (touch) event into the UI.
     * 
     * @param ev A motion event describing the trackball action.  (As noted in 
     * {@link MotionEvent#obtain(long, long, int, float, float, int)}, be sure to use 
     * {@link SystemClock#uptimeMillis()} as the timebase.)
     * @param sync If true, wait for the event to be completed before returning to the caller.
     * @return Returns true if event was dispatched, false if it was dropped for any reason
     */
    public boolean injectPointerEvent(MotionEvent ev, boolean sync) {
        boolean result = dispatchPointer(null, ev, Binder.getCallingPid(), Binder.getCallingUid());
        if (sync) {
            mKeyWaiter.waitForNextEventTarget(null, null, null, false, true);
        }
        return result;        
    }
    
    /**
     * Inject a trackball (navigation device) event into the UI.
     * 
     * @param ev A motion event describing the trackball action.  (As noted in 
     * {@link MotionEvent#obtain(long, long, int, float, float, int)}, be sure to use 
     * {@link SystemClock#uptimeMillis()} as the timebase.)
     * @param sync If true, wait for the event to be completed before returning to the caller.
     * @return Returns true if event was dispatched, false if it was dropped for any reason
     */
    public boolean injectTrackballEvent(MotionEvent ev, boolean sync) {
        boolean result = dispatchTrackball(null, ev, Binder.getCallingPid(), Binder.getCallingUid());
        if (sync) {
            mKeyWaiter.waitForNextEventTarget(null, null, null, false, true);
        }
        return result;
    }
    
    private WindowState getFocusedWindow() {
        synchronized (mWindowMap) {
            return getFocusedWindowLocked();
        }
    }

    private WindowState getFocusedWindowLocked() {
        return mCurrentFocus;
    }
    
    /**
     * This class holds the state for dispatching key events.  This state
     * is protected by the KeyWaiter instance, NOT by the window lock.  You
     * can be holding the main window lock while acquire the KeyWaiter lock,
     * but not the other way around.
     */
    final class KeyWaiter {
        public static final int RETURN_NOTHING = 0;
        public static final int RETURN_PENDING_POINTER = 1;
        public static final int RETURN_PENDING_TRACKBALL = 2;
        
        final Object SKIP_TARGET_TOKEN = new Object();
        final Object CONSUMED_EVENT_TOKEN = new Object();
        
        private WindowState mLastWin = null;
        private IBinder mLastBinder = null;
        private boolean mFinished = true;
        private boolean mGotFirstWindow = false;
        private boolean mEventDispatching = true;
        private long mTimeToSwitch = 0;
        /* package */ boolean mWasFrozen = false;
        
        // Target of Motion events
        WindowState mMotionTarget;

        /**
         * Wait for the last event dispatch to complete, then find the next
         * target that should receive the given event and wait for that one
         * to be ready to receive it.
         */
        Object waitForNextEventTarget(KeyEvent nextKey, QueuedEvent qev,
                MotionEvent nextMotion, boolean isPointerEvent,
                boolean failIfTimeout) {
            long startTime = SystemClock.uptimeMillis();
            long keyDispatchingTimeout = 5 * 1000;
            long waitedFor = 0;

            while (true) {
                // Figure out which window we care about.  It is either the
                // last window we are waiting to have process the event or,
                // if none, then the next window we think the event should go
                // to.  Note: we retrieve mLastWin outside of the lock, so
                // it may change before we lock.  Thus we must check it again.
                WindowState targetWin = mLastWin;
                boolean targetIsNew = targetWin == null;
                if (DEBUG_INPUT) Log.v(
                        TAG, "waitForLastKey: mFinished=" + mFinished +
                        ", mLastWin=" + mLastWin);
                if (targetIsNew) {
                    Object target = findTargetWindow(nextKey, qev, nextMotion,
                            isPointerEvent);
                    if (target == SKIP_TARGET_TOKEN) {
                        // The user has pressed a special key, and we are
                        // dropping all pending events before it.
                        if (DEBUG_INPUT) Log.v(TAG, "Skipping: " + nextKey
                                + " " + nextMotion);
                        return null;
                    }
                    if (target == CONSUMED_EVENT_TOKEN) {
                        if (DEBUG_INPUT) Log.v(TAG, "Consumed: " + nextKey
                                + " " + nextMotion);
                        return target;
                    }
                    targetWin = (WindowState)target;
                }
                
                AppWindowToken targetApp = null;
                
                // Now: is it okay to send the next event to this window?
                synchronized (this) {
                    // First: did we come here based on the last window not
                    // being null, but it changed by the time we got here?
                    // If so, try again.
                    if (!targetIsNew && mLastWin == null) {
                        continue;
                    }
                    
                    // We never dispatch events if not finished with the
                    // last one, or the display is frozen.
                    if (mFinished && !mDisplayFrozen) {
                        // If event dispatching is disabled, then we
                        // just consume the events.
                        if (!mEventDispatching) {
                            if (DEBUG_INPUT) Log.v(TAG,
                                    "Skipping event; dispatching disabled: "
                                    + nextKey + " " + nextMotion);
                            return null;
                        }
                        if (targetWin != null) {
                            // If this is a new target, and that target is not
                            // paused or unresponsive, then all looks good to
                            // handle the event.
                            if (targetIsNew && !targetWin.mToken.paused) {
                                return targetWin;
                            }
                        
                        // If we didn't find a target window, and there is no
                        // focused app window, then just eat the events.
                        } else if (mFocusedApp == null) {
                            if (DEBUG_INPUT) Log.v(TAG,
                                    "Skipping event; no focused app: "
                                    + nextKey + " " + nextMotion);
                            return null;
                        }
                    }
                    
                    if (DEBUG_INPUT) Log.v(
                            TAG, "Waiting for last key in " + mLastBinder
                            + " target=" + targetWin
                            + " mFinished=" + mFinished
                            + " mDisplayFrozen=" + mDisplayFrozen
                            + " targetIsNew=" + targetIsNew
                            + " paused="
                            + (targetWin != null ? targetWin.mToken.paused : false)
                            + " mFocusedApp=" + mFocusedApp);
                    
                    targetApp = targetWin != null
                            ? targetWin.mAppToken : mFocusedApp;
                    
                    long curTimeout = keyDispatchingTimeout;
                    if (mTimeToSwitch != 0) {
                        long now = SystemClock.uptimeMillis();
                        if (mTimeToSwitch <= now) {
                            // If an app switch key has been pressed, and we have
                            // waited too long for the current app to finish
                            // processing keys, then wait no more!
                            doFinishedKeyLocked(true);
                            continue;
                        }
                        long switchTimeout = mTimeToSwitch - now;
                        if (curTimeout > switchTimeout) {
                            curTimeout = switchTimeout;
                        }
                    }
                    
                    try {
                        // after that continue
                        // processing keys, so we don't get stuck.
                        if (DEBUG_INPUT) Log.v(
                                TAG, "Waiting for key dispatch: " + curTimeout);
                        wait(curTimeout);
                        if (DEBUG_INPUT) Log.v(TAG, "Finished waiting @"
                                + SystemClock.uptimeMillis() + " startTime="
                                + startTime + " switchTime=" + mTimeToSwitch);
                    } catch (InterruptedException e) {
                    }
                }

                // If we were frozen during configuration change, restart the
                // timeout checks from now; otherwise look at whether we timed
                // out before awakening.
                if (mWasFrozen) {
                    waitedFor = 0;
                    mWasFrozen = false;
                } else {
                    waitedFor = SystemClock.uptimeMillis() - startTime;
                }

                if (waitedFor >= keyDispatchingTimeout && mTimeToSwitch == 0) {
                    IApplicationToken at = null;
                    synchronized (this) {
                        Log.w(TAG, "Key dispatching timed out sending to " +
                              (targetWin != null ? targetWin.mAttrs.getTitle()
                              : "<null>"));
                        //dump();
                        if (targetWin != null) {
                            at = targetWin.getAppToken();
                        } else if (targetApp != null) {
                            at = targetApp.appToken;
                        }
                    }

                    boolean abort = true;
                    if (at != null) {
                        try {
                            long timeout = at.getKeyDispatchingTimeout();
                            if (timeout > waitedFor) {
                                // we did not wait the proper amount of time for this application.
                                // set the timeout to be the real timeout and wait again.
                                keyDispatchingTimeout = timeout - waitedFor;
                                continue;
                            } else {
                                abort = at.keyDispatchingTimedOut();
                            }
                        } catch (RemoteException ex) {
                        }
                    }

                    synchronized (this) {
                        if (abort && (mLastWin == targetWin || targetWin == null)) {
                            mFinished = true;
                            if (mLastWin != null) { 
                                if (DEBUG_INPUT) Log.v(TAG,
                                        "Window " + mLastWin +
                                        " timed out on key input");
                                if (mLastWin.mToken.paused) {
                                    Log.w(TAG, "Un-pausing dispatching to this window");
                                    mLastWin.mToken.paused = false;
                                }
                            }
                            if (mMotionTarget == targetWin) {
                                mMotionTarget = null;
                            }
                            mLastWin = null;
                            mLastBinder = null;
                            if (failIfTimeout || targetWin == null) {
                                return null;
                            }
                        } else {
                            Log.w(TAG, "Continuing to wait for key to be dispatched");
                            startTime = SystemClock.uptimeMillis();
                        }
                    }
                }
            }
        }
        
        Object findTargetWindow(KeyEvent nextKey, QueuedEvent qev,
                MotionEvent nextMotion, boolean isPointerEvent) {
            if (nextKey != null) {
                // Find the target window for a normal key event.
                final int keycode = nextKey.getKeyCode();
                final int repeatCount = nextKey.getRepeatCount();
                final boolean down = nextKey.getAction() != KeyEvent.ACTION_UP;
                boolean dispatch = mKeyWaiter.checkShouldDispatchKey(keycode);
                if (!dispatch) {
                    mPolicy.interceptKeyTi(null, keycode,
                            nextKey.getMetaState(), down, repeatCount);
                    Log.w(TAG, "Event timeout during app switch: dropping "
                            + nextKey);
                    return SKIP_TARGET_TOKEN;
                }
                
                // System.out.println("##### [" + SystemClock.uptimeMillis() + "] WindowManagerService.dispatchKey(" + keycode + ", " + down + ", " + repeatCount + ")");
                
                WindowState focus = null;
                synchronized(mWindowMap) {
                    focus = getFocusedWindowLocked();
                }
                
                wakeupIfNeeded(focus, LocalPowerManager.BUTTON_EVENT);
                
                if (mPolicy.interceptKeyTi(focus,
                        keycode, nextKey.getMetaState(), down, repeatCount)) {
                    return CONSUMED_EVENT_TOKEN;
                }
                
                return focus;
                
            } else if (!isPointerEvent) {
                boolean dispatch = mKeyWaiter.checkShouldDispatchKey(-1);
                if (!dispatch) {
                    Log.w(TAG, "Event timeout during app switch: dropping trackball "
                            + nextMotion);
                    return SKIP_TARGET_TOKEN;
                }
                
                WindowState focus = null;
                synchronized(mWindowMap) {
                    focus = getFocusedWindowLocked();
                }
                
                wakeupIfNeeded(focus, LocalPowerManager.BUTTON_EVENT);
                return focus;
            }
            
            if (nextMotion == null) {
                return SKIP_TARGET_TOKEN;
            }
            
            boolean dispatch = mKeyWaiter.checkShouldDispatchKey(
                    KeyEvent.KEYCODE_UNKNOWN);
            if (!dispatch) {
                Log.w(TAG, "Event timeout during app switch: dropping pointer "
                        + nextMotion);
                return SKIP_TARGET_TOKEN;
            }
            
            // Find the target window for a pointer event.
            int action = nextMotion.getAction();
            final float xf = nextMotion.getX();
            final float yf = nextMotion.getY();
            final long eventTime = nextMotion.getEventTime();
            
            final boolean screenWasOff = qev != null
                    && (qev.flags&WindowManagerPolicy.FLAG_BRIGHT_HERE) != 0;
            
            WindowState target = null;
            
            synchronized(mWindowMap) {
                synchronized (this) {
                    if (action == MotionEvent.ACTION_DOWN) {
                        if (mMotionTarget != null) {
                            // this is weird, we got a pen down, but we thought it was
                            // already down!
                            // XXX: We should probably send an ACTION_UP to the current
                            // target.
                            Log.w(TAG, "Pointer down received while already down in: "
                                    + mMotionTarget);
                            mMotionTarget = null;
                        }
                        
                        // ACTION_DOWN is special, because we need to lock next events to
                        // the window we'll land onto.
                        final int x = (int)xf;
                        final int y = (int)yf;
    
                        final ArrayList windows = mWindows;
                        final int N = windows.size();
                        WindowState topErrWindow = null;
                        for (int i=N-1; i>=0; i--) {
                            WindowState child = (WindowState)windows.get(i);
                            final int flags = child.mAttrs.flags;
                            if ((flags & WindowManager.LayoutParams.FLAG_SYSTEM_ERROR) != 0) {
                                if (topErrWindow == null) {
                                    topErrWindow = child;
                                }
                            }
                            if (!child.isVisible()) {
                                continue;
                            }
                            final Rect frame = child.mFrame;
                            if ((flags & WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE) != 0) {
                                continue;
                            }
                            final int touchFlags = flags &
                                (WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
                                |WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL);
                            if (frame.contains(x, y) || (touchFlags == 0)) {
                                if (!screenWasOff || (flags &
                                        WindowManager.LayoutParams.FLAG_TOUCHABLE_WHEN_WAKING) != 0) {
                                    mMotionTarget = child;
                                } else {
                                    mMotionTarget = null;
                                }
                                break;
                            }
                        }

                        // if there's an error window but it's not accepting
                        // focus (typically because it is not yet visible) just
                        // wait for it -- any other focused window may in fact
                        // be in ANR state.
                        if (topErrWindow != null && mMotionTarget != topErrWindow) {
                            mMotionTarget = null;
                        }
                    }
                    
                    target = mMotionTarget;
                }
            }
            
            wakeupIfNeeded(target, eventType(nextMotion));
            
            // Pointer events are a little different -- if there isn't a
            // target found for any event, then just drop it.
            return target != null ? target : SKIP_TARGET_TOKEN;
        }
        
        boolean checkShouldDispatchKey(int keycode) {
            synchronized (this) {
                if (mPolicy.isAppSwitchKeyTqTiLwLi(keycode)) {
                    mTimeToSwitch = 0;
                    return true;
                }
                if (mTimeToSwitch != 0
                        && mTimeToSwitch < SystemClock.uptimeMillis()) {
                    return false;
                }
                return true;
            }
        }
        
        void bindTargetWindowLocked(WindowState win,
                int pendingWhat, QueuedEvent pendingMotion) {
            synchronized (this) {
                bindTargetWindowLockedLocked(win, pendingWhat, pendingMotion);
            }
        }
        
        void bindTargetWindowLocked(WindowState win) {
            synchronized (this) {
                bindTargetWindowLockedLocked(win, RETURN_NOTHING, null);
            }
        }

        void bindTargetWindowLockedLocked(WindowState win,
                int pendingWhat, QueuedEvent pendingMotion) {
            mLastWin = win;
            mLastBinder = win.mClient.asBinder();
            mFinished = false;
            if (pendingMotion != null) {
                final Session s = win.mSession;
                if (pendingWhat == RETURN_PENDING_POINTER) {
                    releasePendingPointerLocked(s);
                    s.mPendingPointerMove = pendingMotion;
                    s.mPendingPointerWindow = win;
                    if (DEBUG_INPUT) Log.v(TAG, 
                            "bindTargetToWindow " + s.mPendingPointerMove);
                } else if (pendingWhat == RETURN_PENDING_TRACKBALL) {
                    releasePendingTrackballLocked(s);
                    s.mPendingTrackballMove = pendingMotion;
                    s.mPendingTrackballWindow = win;
                }
            }
        }
        
        void releasePendingPointerLocked(Session s) {
            if (DEBUG_INPUT) Log.v(TAG,
                    "releasePendingPointer " + s.mPendingPointerMove);
            if (s.mPendingPointerMove != null) {
                mQueue.recycleEvent(s.mPendingPointerMove);
                s.mPendingPointerMove = null;
            }
        }
        
        void releasePendingTrackballLocked(Session s) {
            if (s.mPendingTrackballMove != null) {
                mQueue.recycleEvent(s.mPendingTrackballMove);
                s.mPendingTrackballMove = null;
            }
        }
        
        MotionEvent finishedKey(Session session, IWindow client, boolean force,
                int returnWhat) {
            if (DEBUG_INPUT) Log.v(
                TAG, "finishedKey: client=" + client + ", force=" + force);

            if (client == null) {
                return null;
            }

            synchronized (this) {
                if (DEBUG_INPUT) Log.v(
                    TAG, "finishedKey: client=" + client.asBinder()
                    + ", force=" + force + ", last=" + mLastBinder
                    + " (token=" + (mLastWin != null ? mLastWin.mToken : null) + ")");

                QueuedEvent qev = null;
                WindowState win = null;
                if (returnWhat == RETURN_PENDING_POINTER) {
                    qev = session.mPendingPointerMove;
                    win = session.mPendingPointerWindow;
                    session.mPendingPointerMove = null;
                    session.mPendingPointerWindow = null;
                } else if (returnWhat == RETURN_PENDING_TRACKBALL) {
                    qev = session.mPendingTrackballMove;
                    win = session.mPendingTrackballWindow;
                    session.mPendingTrackballMove = null;
                    session.mPendingTrackballWindow = null;
                }
                
                if (mLastBinder == client.asBinder()) {
                    if (DEBUG_INPUT) Log.v(
                        TAG, "finishedKey: last paused="
                        + ((mLastWin != null) ? mLastWin.mToken.paused : "null"));
                    if (mLastWin != null && (!mLastWin.mToken.paused || force
                            || !mEventDispatching)) {
                        doFinishedKeyLocked(false);
                    } else {
                        // Make sure to wake up anyone currently waiting to
                        // dispatch a key, so they can re-evaluate their
                        // current situation.
                        mFinished = true;
                        notifyAll();
                    }
                }
                
                if (qev != null) {
                    MotionEvent res = (MotionEvent)qev.event;
                    if (DEBUG_INPUT) Log.v(TAG,
                            "Returning pending motion: " + res);
                    if (win != null && returnWhat == RETURN_PENDING_POINTER) {
                        res.offsetLocation(-win.mFrame.left, -win.mFrame.top);
                    }
                    mQueue.recycleEvent(qev);
                    return res;
                }
                return null;
            }
        }

        void tickle() {
            synchronized (this) {
                notifyAll();
            }
        }
        
        void handleNewWindowLocked(WindowState newWindow) {
            if (!newWindow.canReceiveKeys()) {
                return;
            }
            synchronized (this) {
                if (DEBUG_INPUT) Log.v(
                    TAG, "New key dispatch window: win="
                    + newWindow.mClient.asBinder()
                    + ", last=" + mLastBinder
                    + " (token=" + (mLastWin != null ? mLastWin.mToken : null)
                    + "), finished=" + mFinished + ", paused="
                    + newWindow.mToken.paused);

                // 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;

                mGotFirstWindow = true;
                boolean doNotify = true;

                if ((newWindow.mAttrs.flags & FLAG_SYSTEM_ERROR) != 0) {
                    if (DEBUG_INPUT) Log.v(TAG,
                            "New SYSTEM_ERROR window; resetting state");
                    mLastWin = null;
                    mLastBinder = null;
                    mMotionTarget = null;
                    mFinished = true;
                } else if (mLastWin != null) {
                    // If the new window is above the window we are
                    // waiting on, then stop waiting and let key dispatching
                    // start on the new guy.
                    if (DEBUG_INPUT) Log.v(
                        TAG, "Last win layer=" + mLastWin.mLayer
                        + ", new win layer=" + newWindow.mLayer);
                    if (newWindow.mLayer >= mLastWin.mLayer) {
                        if (!mLastWin.canReceiveKeys()) {
                            mLastWin.mToken.paused = false;
                            doFinishedKeyLocked(true);  // does a notifyAll()
                            doNotify = false;
                        }
                    } else {
                        // the new window is lower; no need to wake key waiters
                        doNotify = false;
                    }
                }

                if (doNotify) {
                    notifyAll();
                }
            }
        }

        void pauseDispatchingLocked(WindowToken token) {
            synchronized (this)
            {
                if (DEBUG_INPUT) Log.v(TAG, "Pausing WindowToken " + token);
                token.paused = true;

                /*
                if (mLastWin != null && !mFinished && mLastWin.mBaseLayer <= layer) {
                    mPaused = true;
                } else {
                    if (mLastWin == null) {
                        if (Config.LOGI) Log.i(
                            TAG, "Key dispatching not paused: no last window.");
                    } else if (mFinished) {
                        if (Config.LOGI) Log.i(
                            TAG, "Key dispatching not paused: finished last key.");
                    } else {
                        if (Config.LOGI) Log.i(
                            TAG, "Key dispatching not paused: window in higher layer.");
                    }
                }
                */
            }
        }

        void resumeDispatchingLocked(WindowToken token) {
            synchronized (this) {
                if (token.paused) {
                    if (DEBUG_INPUT) Log.v(
                        TAG, "Resuming WindowToken " + token
                        + ", last=" + mLastBinder
                        + " (token=" + (mLastWin != null ? mLastWin.mToken : null)
                        + "), finished=" + mFinished + ", paused="
                        + token.paused);
                    token.paused = false;
                    if (mLastWin != null && mLastWin.mToken == token && mFinished) {
                        doFinishedKeyLocked(true);
                    } else {
                        notifyAll();
                    }
                }
            }
        }

        void setEventDispatchingLocked(boolean enabled) {
            synchronized (this) {
                mEventDispatching = enabled;
                notifyAll();
            }
        }
        
        void appSwitchComing() {
            synchronized (this) {
                // Don't wait for more than .5 seconds for app to finish
                // processing the pending events.
                long now = SystemClock.uptimeMillis() + 500;
                if (DEBUG_INPUT) Log.v(TAG, "appSwitchComing: " + now);
                if (mTimeToSwitch == 0 || now < mTimeToSwitch) {
                    mTimeToSwitch = now;
                }
                notifyAll();
            }
        }
        
        private final void doFinishedKeyLocked(boolean doRecycle) {
            if (mLastWin != null) {
                releasePendingPointerLocked(mLastWin.mSession);
                releasePendingTrackballLocked(mLastWin.mSession);
            }
            
            if (mLastWin == null || !mLastWin.mToken.paused
                || !mLastWin.isVisible()) {
                // If the current window has been paused, we aren't -really-
                // finished...  so let the waiters still wait.
                mLastWin = null;
                mLastBinder = null;
            }
            mFinished = true;
            notifyAll();
        }
    }

    private class KeyQ extends KeyInputQueue
            implements KeyInputQueue.FilterCallback {
        PowerManager.WakeLock mHoldingScreen;
        
        KeyQ() {
            super(mContext);
            PowerManager pm = (PowerManager)mContext.getSystemService(Context.POWER_SERVICE);
            mHoldingScreen = pm.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK
                    | PowerManager.ON_AFTER_RELEASE, "KEEP_SCREEN_ON_FLAG");
            mHoldingScreen.setReferenceCounted(false);
        }

        @Override
        boolean preprocessEvent(InputDevice device, RawInputEvent event) {
            if (mPolicy.preprocessInputEventTq(event)) {
                return true;
            }
            
            switch (event.type) {
                case RawInputEvent.EV_KEY: {
                    // XXX begin hack
                    if (DEBUG) {
                        if (event.keycode == KeyEvent.KEYCODE_G) {
                            if (event.value != 0) {
                                // G down
                                mPolicy.screenTurnedOff(WindowManagerPolicy.OFF_BECAUSE_OF_USER);
                            }
                            return false;
                        }
                        if (event.keycode == KeyEvent.KEYCODE_D) {
                            if (event.value != 0) {
                                //dump();
                            }
                            return false;
                        }
                    }
                    // XXX end hack
                    
                    boolean screenIsOff = !mPowerManager.screenIsOn();
                    boolean screenIsDim = !mPowerManager.screenIsBright();
                    int actions = mPolicy.interceptKeyTq(event, !screenIsOff);
                    
                    if ((actions & WindowManagerPolicy.ACTION_GO_TO_SLEEP) != 0) {
                        mPowerManager.goToSleep(event.when);
                    }

                    if (screenIsOff) {
                        event.flags |= WindowManagerPolicy.FLAG_WOKE_HERE;
                    }
                    if (screenIsDim) {
                        event.flags |= WindowManagerPolicy.FLAG_BRIGHT_HERE;
                    }
                    if ((actions & WindowManagerPolicy.ACTION_POKE_USER_ACTIVITY) != 0) {
                        mPowerManager.userActivity(event.when, false,
                                LocalPowerManager.BUTTON_EVENT);
                    }
                    
                    if ((actions & WindowManagerPolicy.ACTION_PASS_TO_USER) != 0) {
                        if (event.value != 0 && mPolicy.isAppSwitchKeyTqTiLwLi(event.keycode)) {
                            filterQueue(this);
                            mKeyWaiter.appSwitchComing();
                        }
                        return true;
                    } else {
                        return false;
                    }
                }
                    
                case RawInputEvent.EV_REL: {
                    boolean screenIsOff = !mPowerManager.screenIsOn();
                    boolean screenIsDim = !mPowerManager.screenIsBright();
                    if (screenIsOff) {
                        if (!mPolicy.isWakeRelMovementTq(event.deviceId,
                                device.classes, event)) {
                            //Log.i(TAG, "dropping because screenIsOff and !isWakeKey");
                            return false;
                        }
                        event.flags |= WindowManagerPolicy.FLAG_WOKE_HERE;
                    }
                    if (screenIsDim) {
                        event.flags |= WindowManagerPolicy.FLAG_BRIGHT_HERE;
                    }
                    return true;
                }
                
                case RawInputEvent.EV_ABS: {
                    boolean screenIsOff = !mPowerManager.screenIsOn();
                    boolean screenIsDim = !mPowerManager.screenIsBright();
                    if (screenIsOff) {
                        if (!mPolicy.isWakeAbsMovementTq(event.deviceId,
                                device.classes, event)) {
                            //Log.i(TAG, "dropping because screenIsOff and !isWakeKey");
                            return false;
                        }
                        event.flags |= WindowManagerPolicy.FLAG_WOKE_HERE;
                    }
                    if (screenIsDim) {
                        event.flags |= WindowManagerPolicy.FLAG_BRIGHT_HERE;
                    }
                    return true;
                }
                    
                default:
                    return true;
            }
        }

        public int filterEvent(QueuedEvent ev) {
            switch (ev.classType) {
                case RawInputEvent.CLASS_KEYBOARD:
                    KeyEvent ke = (KeyEvent)ev.event;
                    if (mPolicy.isMovementKeyTi(ke.getKeyCode())) {
                        Log.w(TAG, "Dropping movement key during app switch: "
                                + ke.getKeyCode() + ", action=" + ke.getAction());
                        return FILTER_REMOVE;
                    }
                    return FILTER_ABORT;
                default:
                    return FILTER_KEEP;
            }
        }
        
        /**
         * Must be called with the main window manager lock held.
         */
        void setHoldScreenLocked(boolean holding) {
            boolean state = mHoldingScreen.isHeld();
            if (holding != state) {
                if (holding) {
                    mHoldingScreen.acquire();
                } else {
                    long curTime = SystemClock.uptimeMillis();
                    mPowerManager.userActivity(curTime, false, LocalPowerManager.OTHER_EVENT);
                    mHoldingScreen.release();
                }
            }
        }
    };

    public void systemReady() {
        mPolicy.systemReady();
    }
    
    private final class InputDispatcherThread extends Thread {
        // Time to wait when there is nothing to do: 9999 seconds.
        static final int LONG_WAIT=9999*1000;

        public InputDispatcherThread() {
            super("InputDispatcher");
        }
        
        @Override
        public void run() {
            while (true) {
                try {
                    process();
                } catch (Exception e) {
                    Log.e(TAG, "Exception in input dispatcher", e);
                }
            }
        }
        
        private void process() {
            android.os.Process.setThreadPriority(
                    android.os.Process.THREAD_PRIORITY_URGENT_DISPLAY);
            
            // The last key event we saw
            KeyEvent lastKey = null;

            // Last keydown time for auto-repeating keys
            long lastKeyTime = SystemClock.uptimeMillis();
            long nextKeyTime = lastKeyTime+LONG_WAIT;

            // How many successive repeats we generated 
            int keyRepeatCount = 0;

            // Need to report that configuration has changed?
            boolean configChanged = false;
            
            while (true) {
                long curTime = SystemClock.uptimeMillis();

                if (DEBUG_INPUT) Log.v(
                    TAG, "Waiting for next key: now=" + curTime
                    + ", repeat @ " + nextKeyTime);

                // Retrieve next event, waiting only as long as the next
                // repeat timeout.  If the configuration has changed, then
                // don't wait at all -- we'll report the change as soon as
                // we have processed all events.
                QueuedEvent ev = mQueue.getEvent(
                    (int)((!configChanged && curTime < nextKeyTime)
                            ? (nextKeyTime-curTime) : 0));

                if (DEBUG_INPUT && ev != null) Log.v(
                        TAG, "Event: type=" + ev.classType + " data=" + ev.event);

                try {
                    if (ev != null) {
                        curTime = ev.when;
                        int eventType;
                        if (ev.classType == RawInputEvent.CLASS_TOUCHSCREEN) {
                            eventType = eventType((MotionEvent)ev.event);
                        } else if (ev.classType == RawInputEvent.CLASS_KEYBOARD ||
                                    ev.classType == RawInputEvent.CLASS_TRACKBALL) {
                            eventType = LocalPowerManager.BUTTON_EVENT;
                        } else {
                            eventType = LocalPowerManager.OTHER_EVENT;
                        }
                        mPowerManager.userActivity(curTime, false, eventType);
                        switch (ev.classType) {
                            case RawInputEvent.CLASS_KEYBOARD:
                                KeyEvent ke = (KeyEvent)ev.event;
                                if (ke.isDown()) {
                                    lastKey = ke;
                                    keyRepeatCount = 0;
                                    lastKeyTime = curTime;
                                    nextKeyTime = lastKeyTime
                                            + KEY_REPEAT_FIRST_DELAY;
                                    if (DEBUG_INPUT) Log.v(
                                        TAG, "Received key down: first repeat @ "
                                        + nextKeyTime);
                                } else {
                                    lastKey = null;
                                    // Arbitrary long timeout.
                                    lastKeyTime = curTime;
                                    nextKeyTime = curTime + LONG_WAIT;
                                    if (DEBUG_INPUT) Log.v(
                                        TAG, "Received key up: ignore repeat @ "
                                        + nextKeyTime);
                                }
                                dispatchKey((KeyEvent)ev.event, 0, 0);
                                mQueue.recycleEvent(ev);
                                break;
                            case RawInputEvent.CLASS_TOUCHSCREEN:
                                //Log.i(TAG, "Read next event " + ev);
                                dispatchPointer(ev, (MotionEvent)ev.event, 0, 0);
                                break;
                            case RawInputEvent.CLASS_TRACKBALL:
                                dispatchTrackball(ev, (MotionEvent)ev.event, 0, 0);
                                break;
                            case RawInputEvent.CLASS_CONFIGURATION_CHANGED:
                                configChanged = true;
                                break;
                            default:
                                mQueue.recycleEvent(ev);
                            break;
                        }
                        
                    } else if (configChanged) {
                        configChanged = false;
                        sendNewConfiguration();
                        
                    } else if (lastKey != null) {
                        curTime = SystemClock.uptimeMillis();
                        
                        // Timeout occurred while key was down.  If it is at or
                        // past the key repeat time, dispatch the repeat.
                        if (DEBUG_INPUT) Log.v(
                            TAG, "Key timeout: repeat=" + nextKeyTime
                            + ", now=" + curTime);
                        if (curTime < nextKeyTime) {
                            continue;
                        }
    
                        lastKeyTime = nextKeyTime;
                        nextKeyTime = nextKeyTime + KEY_REPEAT_DELAY;
                        keyRepeatCount++;
                        if (DEBUG_INPUT) Log.v(
                            TAG, "Key repeat: count=" + keyRepeatCount
                            + ", next @ " + nextKeyTime);
                        dispatchKey(new KeyEvent(lastKey, curTime, keyRepeatCount), 0, 0);
                        
                    } else {
                        curTime = SystemClock.uptimeMillis();
                        
                        lastKeyTime = curTime;
                        nextKeyTime = curTime + LONG_WAIT;
                    }
                    
                } catch (Exception e) {
                    Log.e(TAG,
                        "Input thread received uncaught exception: " + e, e);
                }
            }
        }
    }

    // -------------------------------------------------------------
    // Client Session State
    // -------------------------------------------------------------

    private final class Session extends IWindowSession.Stub
            implements IBinder.DeathRecipient {
        final IBinder mToken;
        final int mUid;
        final int mPid;
        SurfaceSession mSurfaceSession;
        int mNumWindow = 0;
        boolean mClientDead = false;
        
        /**
         * Current pointer move event being dispatched to client window...  must
         * hold key lock to access.
         */
        QueuedEvent mPendingPointerMove;
        WindowState mPendingPointerWindow;
        
        /**
         * Current trackball move event being dispatched to client window...  must
         * hold key lock to access.
         */
        QueuedEvent mPendingTrackballMove;
        WindowState mPendingTrackballWindow;

        public Session(IBinder token) {
            mToken = token;
            mUid = Binder.getCallingUid();
            mPid = Binder.getCallingPid();
            try {
                token.linkToDeath(this, 0);
            } catch (RemoteException e) {
                // The caller has died, so we can just forget about this.
            }
        }
        
        @Override
        public boolean onTransact(int code, Parcel data, Parcel reply, int flags)
                throws RemoteException {
            try {
                return super.onTransact(code, data, reply, flags);
            } catch (RuntimeException e) {
                // Log all 'real' exceptions thrown to the caller
                if (!(e instanceof SecurityException)) {
                    Log.e(TAG, "Window Session Crash", e);
                }
                throw e;
            }
        }

        public void binderDied() {
            synchronized(mWindowMap) {
                mClientDead = true;
                killSessionLocked();
            }
        }

        public int add(IWindow window, WindowManager.LayoutParams attrs,
                int viewVisibility, Rect outCoveredInsets) {
            return addWindow(this, window, attrs, viewVisibility, outCoveredInsets);
        }
        
        public void remove(IWindow window) {
            removeWindow(this, window);
        }
        
        public int relayout(IWindow window, WindowManager.LayoutParams attrs,
                int requestedWidth, int requestedHeight, int viewFlags,
                Rect outFrame, Rect outCoveredInsets, Surface outSurface) {
            return relayoutWindow(this, window, attrs,
                    requestedWidth, requestedHeight, viewFlags,
                    outFrame, outCoveredInsets, outSurface);
        }
        
        public void finishDrawing(IWindow window) {
            if (localLOGV) Log.v(
                TAG, "IWindow finishDrawing called for " + window);
            finishDrawingWindow(this, window);
        }

        public void finishKey(IWindow window) {
            if (localLOGV) Log.v(
                TAG, "IWindow finishKey called for " + window);
            mKeyWaiter.finishedKey(this, window, false,
                    KeyWaiter.RETURN_NOTHING);
        }

        public MotionEvent getPendingPointerMove(IWindow window) {
            if (localLOGV) Log.v(
                    TAG, "IWindow getPendingMotionEvent called for " + window);
            return mKeyWaiter.finishedKey(this, window, false,
                    KeyWaiter.RETURN_PENDING_POINTER);
        }
        
        public MotionEvent getPendingTrackballMove(IWindow window) {
            if (localLOGV) Log.v(
                    TAG, "IWindow getPendingMotionEvent called for " + window);
            return mKeyWaiter.finishedKey(this, window, false,
                    KeyWaiter.RETURN_PENDING_TRACKBALL);
        }
        
        public void setTransparentRegion(IWindow window, Region region) {
            setTransparentRegionWindow(this, window, region);
        }

        public void setInTouchMode(boolean mode) {
            synchronized(mWindowMap) {
                mInTouchMode = mode;
            }
        }

        public boolean getInTouchMode() {
            synchronized(mWindowMap) {
                return mInTouchMode;
            }
        }

        void windowAddedLocked() {
            if (mSurfaceSession == null) {
                if (localLOGV) Log.v(
                    TAG, "First window added to " + this + ", creating SurfaceSession");
                mSurfaceSession = new SurfaceSession();
                mSessions.add(this);
            }
            mNumWindow++;
        }

        void windowRemovedLocked() {
            mNumWindow--;
            killSessionLocked();
        }
    
        void killSessionLocked() {
            if (mNumWindow <= 0 && mClientDead) {
                mSessions.remove(this);
                if (mSurfaceSession != null) {
                    if (localLOGV) Log.v(
                        TAG, "Last window removed from " + this
                        + ", destroying " + mSurfaceSession);
                    try {
                        mSurfaceSession.kill();
                    } catch (Exception e) {
                        Log.w(TAG, "Exception thrown when killing surface session "
                            + mSurfaceSession + " in session " + this
                            + ": " + e.toString());
                    }
                    mSurfaceSession = null;
                }
            }
        }
        
        void dump(PrintWriter pw, String prefix) {
            pw.println(prefix + this);
            pw.println(prefix + "mNumWindow=" + mNumWindow
                    + " mClientDead=" + mClientDead
                    + " mSurfaceSession=" + mSurfaceSession);
            pw.println(prefix + "mPendingPointerWindow=" + mPendingPointerWindow
                    + " mPendingPointerMove=" + mPendingPointerMove);
            pw.println(prefix + "mPendingTrackballWindow=" + mPendingTrackballWindow
                    + " mPendingTrackballMove=" + mPendingTrackballMove);
        }

        @Override
        public String toString() {
            return "Session{"
                + Integer.toHexString(System.identityHashCode(this)) + "}";
        }
    }

    // -------------------------------------------------------------
    // Client Window State
    // -------------------------------------------------------------

    private final class WindowState implements WindowManagerPolicy.WindowState {
        final Session mSession;
        final IWindow mClient;
        WindowToken mToken;
        AppWindowToken mAppToken;
        final WindowManager.LayoutParams mAttrs = new WindowManager.LayoutParams();
        final DeathRecipient mDeathRecipient;
        final WindowState mAttachedWindow;
        final ArrayList mChildWindows = new ArrayList();
        final int mBaseLayer;
        final int mSubLayer;
        int mViewVisibility;
        boolean mPolicyVisibility = true;
        boolean mAppFreezing;
        Surface mSurface;
        boolean mAttachedHidden;    // is our parent window hidden?
        boolean mLastHidden;        // was this window last hidden?
        int mRequestedWidth;
        int mRequestedHeight;
        int mLastRequestedWidth;
        int mLastRequestedHeight;
        int mReqXPos;
        int mReqYPos;
        int mLayer;
        int mAnimLayer;
        int mLastLayer;
        boolean mHaveFrame;

        // Actual frame shown on-screen (may be modified by animation)
        final Rect mShownFrame = new Rect();
        final Rect mLastShownFrame = new Rect();
        
        /**
         * Insets that are covered by system windows
         */
        final Rect mCoveredInsets = new Rect();

        // Current transformation being applied.
        float mDsDx=1, mDtDx=0, mDsDy=0, mDtDy=1;
        float mLastDsDx=1, mLastDtDx=0, mLastDsDy=0, mLastDtDy=1;
        float mHScale=1, mVScale=1;
        float mLastHScale=1, mLastVScale=1;
        final Matrix mTmpMatrix = new Matrix();

        // "Real" frame that the application sees.
        final Rect mFrame = new Rect();
        final Rect mLastFrame = new Rect();

        final Rect mContainingFrame = new Rect();

        float mShownAlpha = 1;
        float mAlpha = 1;
        float mLastAlpha = 1;

        // Set to true if, when the window gets displayed, it should perform
        // an enter animation.
        boolean mEnterAnimationPending;

        // Currently running animation.
        boolean mAnimating;
        Animation mAnimation;
        boolean mAnimationIsEntrance;
        boolean mHasTransformation;
        final Transformation mTransformation = new Transformation();

        // This is set after IWindowSession.relayout() has been called at
        // least once for the window.  It allows us to detect the situation
        // where we don't yet have a surface, but should have one soon, so
        // we can give the window focus before waiting for the relayout.
        boolean mRelayoutCalled;
        
        // This is set after the Surface has been created but before the
        // window has been drawn.  During this time the surface is hidden.
        boolean mDrawPending;

        // This is set after the window has finished drawing for the first
        // time but before its surface is shown.  The surface will be
        // displayed when the next layout is run.
        boolean mCommitDrawPending;

        // This is set during the time after the window's drawing has been
        // committed, and before its surface is actually shown.  It is used
        // to delay showing the surface until all windows in a token are ready
        // to be shown.
        boolean mReadyToShow;
        
        // Set when the window has been shown in the screen the first time.
        boolean mHasDrawn;

        // Currently running an exit animation?
        boolean mExiting;

        // Currently on the mDestroySurface list?
        boolean mDestroying;
        
        // Completely remove from window manager after exit animation?
        boolean mRemoveOnExit;

        // Set when the orientation is changing and this window has not yet
        // been updated for the new orientation.
        boolean mOrientationChanging;
        
        WindowState(Session s, IWindow c, WindowToken token,
               WindowState attachedWindow, WindowManager.LayoutParams a,
               int viewVisibility) {
            mSession = s;
            mClient = c;
            mToken = token;
            mAttrs.copyFrom(a);
            mViewVisibility = viewVisibility;
            DeathRecipient deathRecipient = new DeathRecipient();
            mAlpha = a.alpha;
            if (localLOGV) Log.v(
                TAG, "Window " + this + " client=" + c.asBinder()
                + " token=" + token + " (" + mAttrs.token + ")");
            try {
                c.asBinder().linkToDeath(deathRecipient, 0);
            } catch (RemoteException e) {
                mDeathRecipient = null;
                mAttachedWindow = null;
                mBaseLayer = 0;
                mSubLayer = 0;
                return;
            }
            mDeathRecipient = deathRecipient;
            
            if (mAttrs.type >= mAttrs.FIRST_SUB_WINDOW &&
                mAttrs.type <= mAttrs.LAST_SUB_WINDOW) {
                // The multiplier here is to reserve space for multiple
                // windows in the same type layer.
                mBaseLayer = mPolicy.windowTypeToLayerLw(
                        attachedWindow.mAttrs.type) * TYPE_LAYER_MULTIPLIER
                        + TYPE_LAYER_OFFSET;
                mSubLayer = mPolicy.subWindowTypeToLayerLw(a.type);
                mAttachedWindow = attachedWindow;
                mAttachedWindow.mChildWindows.add(this);
            } else {
                // The multiplier here is to reserve space for multiple
                // windows in the same type layer.
                mBaseLayer = mPolicy.windowTypeToLayerLw(a.type)
                        * TYPE_LAYER_MULTIPLIER
                        + TYPE_LAYER_OFFSET;
                mSubLayer = 0;
                mAttachedWindow = null;
            }

            WindowState appWin = this;
            while (appWin.mAttachedWindow != null) {
                appWin = mAttachedWindow;
            }
            WindowToken appToken = appWin.mToken;
            while (appToken.appWindowToken == null) {
                WindowToken parent = mTokenMap.get(appToken.token);
                if (parent == null || appToken == parent) {
                    break;
                }
                appToken = parent;
            }
            mAppToken = appToken.appWindowToken;

            mSurface = null;
            mRequestedWidth = 0;
            mRequestedHeight = 0;
            mLastRequestedWidth = 0;
            mLastRequestedHeight = 0;
            mReqXPos = 0;
            mReqYPos = 0;
            mLayer = 0;
            mAnimLayer = 0;
            mLastLayer = 0;
        }

        void attach() {
            if (localLOGV) Log.v(
                TAG, "Attaching " + this + " token=" + mToken
                + ", list=" + mToken.windows);
            mSession.windowAddedLocked();
        }

        public void computeFrameLw(int pl, int pt, int pr, int pb,
                int dl, int dt, int dr, int db) {
            mHaveFrame = true;

            final int pw = pr-pl;
            final int ph = pb-pt;

            int w,h;
            if ((mAttrs.flags & mAttrs.FLAG_SCALED) != 0) {
                w = mAttrs.width < 0 ? pw : mAttrs.width;
                h = mAttrs.height< 0 ? ph : mAttrs.height;
            } else {
                w = mAttrs.width == mAttrs.FILL_PARENT ? pw : mRequestedWidth;
                h = mAttrs.height== mAttrs.FILL_PARENT ? ph : mRequestedHeight;
            }
            
            final Rect container = mContainingFrame;
            container.left = pl;
            container.top = pt;
            container.right = pr;
            container.bottom = pb;

            final Rect frame = mFrame;
            
            //System.out.println("In: w=" + w + " h=" + h + " container=" +
            //                   container + " x=" + mAttrs.x + " y=" + mAttrs.y);

            Gravity.apply(mAttrs.gravity, w, h, container,
                    (int) (mAttrs.x + mAttrs.horizontalMargin * pw),
                    (int) (mAttrs.y + mAttrs.verticalMargin * ph), frame);

            //System.out.println("Out: " + mFrame);

            // Now make sure the window fits in the overall display.
            int off = 0;
            if (frame.left < dl) off = dl-frame.left;
            else if (frame.right > dr) off = dr-frame.right;
            if (off != 0) {
                if (frame.width() > (dr-dl)) {
                    frame.left = dl;
                    frame.right = dr;
                } else {
                    frame.left += off;
                    frame.right += off;
                }
            }
            off = 0;
            if (frame.top < dt) off = dt-frame.top;
            else if (frame.bottom > db) off = db-frame.bottom;
            if (off != 0) {
                if (frame.height() > (db-dt)) {
                    frame.top = dt;
                    frame.bottom = db;
                } else {
                    frame.top += off;
                    frame.bottom += off;
                }                    
            }
            
            if (localLOGV) Log.v(TAG, "Resolving (mRequestedWidth="
                    + mRequestedWidth + ", mRequestedheight="
                    + mRequestedHeight + ") to" + " (pw=" + pw + ", dh=" + ph
                    + "): frame=" + mFrame);
        }
        
        public void setFrameLw(int left, int top, int right, int bottom)
        {
            mHaveFrame = true;
            mFrame.left = left;
            mFrame.top = top;
            mFrame.right = right;
            mFrame.bottom = bottom;
        }

        public Rect getFrameLw()
        {
            return mFrame;
        }

        public WindowManager.LayoutParams getAttrs()
        {
            return mAttrs;
        }

        public IApplicationToken getAppToken()
        {
            return mAppToken != null ? mAppToken.appToken : null;
        }

        public boolean hasAppShownWindows()
        {
            return mAppToken != null ? mAppToken.firstWindowDrawn : false;
        }

        public boolean hasAppStartingIcon() {
            return mAppToken != null ? (mAppToken.startingData != null) : false;
        }

        public WindowManagerPolicy.WindowState getAppStartingWindow() {
            return mAppToken != null ? mAppToken.startingWindow : null;
        }

        public void setAnimation(Animation anim) {
            if (localLOGV) Log.v(
                TAG, "Setting animation in " + this + ": " + anim);
            mAnimating = false;
            mAnimation = anim;
            mAnimation.restrictDuration(MAX_ANIMATION_DURATION);
            mAnimation.scaleCurrentDuration(mWindowAnimationScale);
        }

        public void clearAnimation() {
            if (mAnimation != null) {
                mAnimating = true;
                mAnimation = null;
            }
        }
        
        Surface createSurfaceLocked() {
            if (mSurface == null) {
                mDrawPending = true;
                mCommitDrawPending = false;
                mReadyToShow = false;
                if (mAppToken != null) {
                    mAppToken.allDrawn = false;
                }

                int flags = 0;
                if (mAttrs.memoryType == MEMORY_TYPE_HARDWARE) {
                    flags |= Surface.HARDWARE;
                } else if (mAttrs.memoryType == MEMORY_TYPE_GPU) {
                    flags |= Surface.GPU;
                } else if (mAttrs.memoryType == MEMORY_TYPE_PUSH_BUFFERS) {
                    flags |= Surface.PUSH_BUFFERS;
                }

                if ((mAttrs.flags&WindowManager.LayoutParams.FLAG_SECURE) != 0) {
                    flags |= Surface.SECURE;
                }
                if (DEBUG_VISIBILITY) Log.v(
                    TAG, "Creating surface in session "
                    + mSession.mSurfaceSession + " window " + this
                    + " w=" + mFrame.width()
                    + " h=" + mFrame.height() + " format="
                    + mAttrs.format + " flags=" + flags);

                int w = mFrame.width();
                int h = mFrame.height();
                if ((mAttrs.flags & LayoutParams.FLAG_SCALED) != 0) {
                    // for a scaled surface, we always want the requested
                    // size.
                    w = mRequestedWidth;
                    h = mRequestedHeight;
                }

                try {
                    mSurface = new Surface(
                            mSession.mSurfaceSession, mSession.mPid, 
                            0, w, h, mAttrs.format, flags);
                } catch (Surface.OutOfResourcesException e) {
                    Log.w(TAG, "OutOfResourcesException creating surface");
                    reclaimSomeSurfaceMemoryLocked(this, "create");
                    return null;
                } catch (Exception e) {
                    Log.e(TAG, "Exception creating surface", e);
                    return null;
                }
                
                if (localLOGV) Log.v(
                    TAG, "Got surface: " + mSurface
                    + ", set left=" + mFrame.left + " top=" + mFrame.top
                    + ", animLayer=" + mAnimLayer);
                if (SHOW_TRANSACTIONS) {
                    Log.i(TAG, ">>> OPEN TRANSACTION");
                    Log.i(TAG, "  SURFACE " + mSurface + ": CREATE ("
                            + mAttrs.getTitle() + ") pos=(" +
                          mFrame.left + "," + mFrame.top + ") (" +
                          mFrame.width() + "x" + mFrame.height() + "), layer=" +
                          mAnimLayer + " HIDE");
                }
                Surface.openTransaction();
                try {
                    try {
                        mSurface.setPosition(mFrame.left, mFrame.top);
                        mSurface.setLayer(mAnimLayer);
                        mSurface.hide();
                        if ((mAttrs.flags&WindowManager.LayoutParams.FLAG_DITHER) != 0) {
                            mSurface.setFlags(Surface.SURFACE_DITHER,
                                    Surface.SURFACE_DITHER);
                        }
                    } catch (RuntimeException e) {
                        Log.w(TAG, "Error creating surface in " + w, e);
                        reclaimSomeSurfaceMemoryLocked(this, "create-init");
                    }
                    mLastHidden = true;
                } finally {
                    if (SHOW_TRANSACTIONS) Log.i(TAG, "<<< CLOSE TRANSACTION");
                    Surface.closeTransaction();
                }
                if (localLOGV) Log.v(
                        TAG, "Created surface " + this);
            }
            return mSurface;
        }
        
        void destroySurfaceLocked() {
            // Window is no longer on-screen, so can no longer receive
            // key events...  if we were waiting for it to finish
            // handling a key event, the wait is over!
            mKeyWaiter.finishedKey(mSession, mClient, true,
                    KeyWaiter.RETURN_NOTHING);
            mKeyWaiter.releasePendingPointerLocked(mSession);
            mKeyWaiter.releasePendingTrackballLocked(mSession);

            if (mAppToken != null && this == mAppToken.startingWindow) {
                mAppToken.startingDisplayed = false;
            }
            
            if (localLOGV) Log.v(
                TAG, "Window " + this
                + " destroying surface " + mSurface + ", session " + mSession);
            if (mSurface != null) {
                try {
                    if (SHOW_TRANSACTIONS) {
                        RuntimeException ex = new RuntimeException();
                        ex.fillInStackTrace();
                        Log.i(TAG, "  SURFACE " + mSurface + ": DESTROY ("
                                + mAttrs.getTitle() + ")", ex);
                    }
                    mSurface.clear();
                } catch (RuntimeException e) {
                    Log.w(TAG, "Exception thrown when destroying Window " + this
                        + " surface " + mSurface + " session " + mSession
                        + ": " + e.toString());
                }
                mSurface = null;
                mDrawPending = false;
                mCommitDrawPending = false;
                mReadyToShow = false;

                int i = mChildWindows.size();
                while (i > 0) {
                    i--;
                    WindowState c = (WindowState)mChildWindows.get(i);
                    c.mAttachedHidden = true;
                }
            }
        }

        boolean finishDrawingLocked() {
            if (mDrawPending) {
                if (SHOW_TRANSACTIONS || DEBUG_ORIENTATION) Log.v(
                    TAG, "finishDrawingLocked: " + mSurface);
                mCommitDrawPending = true;
                mDrawPending = false;
                return true;
            }
            return false;
        }

        // This must be called while inside a transaction.
        void commitFinishDrawingLocked(long currentTime) {
            //Log.i(TAG, "commitFinishDrawingLocked: " + mSurface);
            if (!mCommitDrawPending) {
                return;
            }
            mCommitDrawPending = false;
            mReadyToShow = true;
            final boolean starting = mAttrs.type == TYPE_APPLICATION_STARTING;
            final AppWindowToken atoken = mAppToken;
            if (atoken == null || atoken.allDrawn || starting) {
                performShowLocked();
            }
        }

        // This must be called while inside a transaction.
        boolean performShowLocked() {
            if (DEBUG_VISIBILITY) {
                RuntimeException e = new RuntimeException();
                e.fillInStackTrace();
                Log.v(TAG, "performShow on " + this
                        + ": readyToShow=" + mReadyToShow + " readyForDisplay=" + isReadyForDisplay()
                        + " starting=" + (mAttrs.type == TYPE_APPLICATION_STARTING), e);
            }
            if (mReadyToShow && isReadyForDisplay()) {
                if (SHOW_TRANSACTIONS || DEBUG_ORIENTATION) Log.i(
                        TAG, "  SURFACE " + mSurface + ": SHOW (performShowLocked)");
                if (DEBUG_VISIBILITY) Log.v(TAG, "Showing " + this
                        + " during animation: policyVis=" + mPolicyVisibility
                        + " attHidden=" + mAttachedHidden
                        + " tok.hiddenRequested="
                        + (mAppToken != null ? mAppToken.hiddenRequested : false)
                        + " tok.idden="
                        + (mAppToken != null ? mAppToken.hidden : false)
                        + " animating=" + mAnimating
                        + " tok animating="
                        + (mAppToken != null ? mAppToken.animating : false));
                if (!showSurfaceRobustlyLocked(this)) {
                    return false;
                }
                mLastAlpha = -1;
                mHasDrawn = true;
                mLastHidden = false;
                mReadyToShow = false;
                enableScreenIfNeededLocked();

                applyEnterAnimationLocked(this);
                
                int i = mChildWindows.size();
                while (i > 0) {
                    i--;
                    WindowState c = (WindowState)mChildWindows.get(i);
                    if (c.mSurface != null && c.mAttachedHidden) {
                        c.mAttachedHidden = false;
                        c.performShowLocked();
                    }
                }
                
                if (mAttrs.type != TYPE_APPLICATION_STARTING
                        && mAppToken != null) {
                    mAppToken.firstWindowDrawn = true;
                    if (mAnimation == null && mAppToken.startingData != null) {
                        if (DEBUG_STARTING_WINDOW) Log.v(TAG, "Finish starting "
                                + mToken
                                + ": first real window is shown, no animation");
                        mFinishedStarting.add(mAppToken);
                        mH.sendEmptyMessage(H.FINISHED_STARTING);
                    }
                    mAppToken.updateReportedVisibilityLocked();
                }
            }
            return true;
        }
        
        // This must be called while inside a transaction.  Returns true if
        // there is more animation to run.
        boolean stepAnimationLocked(long currentTime, int dw, int dh) {
            if (!mDisplayFrozen) {
                // We will run animations as long as the display isn't frozen.
                
                if (!mDrawPending && !mCommitDrawPending && mAnimation != null) {
                    mHasTransformation = true;
                    if (!mAnimating) {
                        if (DEBUG_ANIM) Log.v(
                            TAG, "Starting animation in " + this +
                            " @ " + currentTime + ": ww=" + mFrame.width() + " wh=" + mFrame.height() +
                            " dw=" + dw + " dh=" + dh + " scale=" + mWindowAnimationScale);
                        mAnimation.initialize(mFrame.width(), mFrame.height(), dw, dh);
                        mAnimation.setStartTime(currentTime);
                        mAnimating = true;
                    }
                    mTransformation.clear();
                    final boolean more = mAnimation.getTransformation(
                        currentTime, mTransformation);
                    if (DEBUG_ANIM) Log.v(
                        TAG, "Stepped animation in " + this +
                        ": more=" + more + ", xform=" + mTransformation);
                    if (mAppToken != null && mAppToken.hasTransformation) {
                        mTransformation.compose(mAppToken.transformation);
                    }
                    if (more) {
                        // we're not done!
                        return true;
                    }
                    if (DEBUG_ANIM) Log.v(
                        TAG, "Finished animation in " + this +
                        " @ " + currentTime);
                    mAnimation = null;
                    //WindowManagerService.this.dump();
                }
                if (mAppToken != null && mAppToken.hasTransformation) {
                    mAnimating = true;
                    mHasTransformation = true;
                    mTransformation.set(mAppToken.transformation);
                    return false;
                } else if (mHasTransformation) {
                    // Little trick to get through the path below to act like
                    // we have finished an animation.
                    mAnimating = true;
                } else if (isAnimating()) {
                    mAnimating = true;
                }
            } else if (mAnimation != null) {
                // If the display is frozen, and there is a pending animation,
                // clear it and make sure we run the cleanup code.
                mAnimating = true;
                mAnimation = null;
            }
            
            if (!mAnimating) {
                return false;
            }

            if (DEBUG_ANIM) Log.v(
                TAG, "Animation done in " + this + ": exiting=" + mExiting
                + ", reportedVisible="
                + (mAppToken != null ? mAppToken.reportedVisible : false));
            
            mAnimating = false;
            mAnimation = null;
            mAnimLayer = mLayer;
            mHasTransformation = false;
            mTransformation.clear();
            if (mHasDrawn
                    && mAttrs.type == WindowManager.LayoutParams.TYPE_APPLICATION_STARTING
                    && mAppToken != null
                    && mAppToken.firstWindowDrawn
                    && mAppToken.startingData != null) {
                if (DEBUG_STARTING_WINDOW) Log.v(TAG, "Finish starting "
                        + mToken + ": first real window done animating");
                mFinishedStarting.add(mAppToken);
                mH.sendEmptyMessage(H.FINISHED_STARTING);
            }
            
            finishExit();

            if (mAppToken != null) {
                mAppToken.updateReportedVisibilityLocked();
            }

            return false;
        }

        void finishExit() {
            if (DEBUG_ANIM) Log.v(
                    TAG, "finishExit in " + this
                    + ": exiting=" + mExiting
                    + " remove=" + mRemoveOnExit
                    + " windowAnimating=" + isWindowAnimating());
            
            final int N = mChildWindows.size();
            for (int i=0; i<N; i++) {
                ((WindowState)mChildWindows.get(i)).finishExit();
            }
            
            if (!mExiting) {
                return;
            }
            
            if (isWindowAnimating()) {
                return;
            }

            if (localLOGV) Log.v(
                    TAG, "Exit animation finished in " + this
                    + ": remove=" + mRemoveOnExit);
            if (mSurface != null) {
                mDestroySurface.add(this);
                mDestroying = true;
                if (SHOW_TRANSACTIONS) Log.i(
                        TAG, "  SURFACE " + mSurface + ": HIDE (finishExit)");
                try {
                    mSurface.hide();
                } catch (RuntimeException e) {
                    Log.w(TAG, "Error hiding surface in " + this, e);
                }
                mLastHidden = true;
                mKeyWaiter.releasePendingPointerLocked(mSession);
            }
            mExiting = false;
            if (mRemoveOnExit) {
                mPendingRemove.add(this);
                mRemoveOnExit = false;
            }
        }
        
        boolean isIdentityMatrix(float dsdx, float dtdx, float dsdy, float dtdy) {
            if (dsdx < .99999f || dsdx > 1.00001f) return false;
            if (dtdy < .99999f || dtdy > 1.00001f) return false;
            if (dtdx < -.000001f || dtdx > .000001f) return false;
            if (dsdy < -.000001f || dsdy > .000001f) return false;
            return true;
        }
        
        void computeShownFrameLocked() {
            final boolean selfTransformation = mHasTransformation;
            final boolean attachedTransformation = (mAttachedWindow != null
                    && mAttachedWindow.mHasTransformation);
            if (selfTransformation || attachedTransformation) {
                // cache often used attributes locally  
                final Rect frame = mFrame;
                final float tmpFloats[] = mTmpFloats;
                final Matrix tmpMatrix = mTmpMatrix;

                // Compute the desired transformation.
                tmpMatrix.setTranslate(frame.left, frame.top);
                if (selfTransformation) {
                    tmpMatrix.preConcat(mTransformation.getMatrix());
                }
                if (attachedTransformation) {
                    tmpMatrix.preConcat(mAttachedWindow.mTransformation.getMatrix());
                }

                // "convert" it into SurfaceFlinger's format
                // (a 2x2 matrix + an offset)
                // Here we must not transform the position of the surface
                // since it is already included in the transformation.
                //Log.i(TAG, "Transform: " + matrix);
                
                tmpMatrix.getValues(tmpFloats);
                mDsDx = tmpFloats[Matrix.MSCALE_X];
                mDtDx = tmpFloats[Matrix.MSKEW_X];
                mDsDy = tmpFloats[Matrix.MSKEW_Y];
                mDtDy = tmpFloats[Matrix.MSCALE_Y];
                int x = (int)tmpFloats[Matrix.MTRANS_X];
                int y = (int)tmpFloats[Matrix.MTRANS_Y];
                int w = frame.width();
                int h = frame.height();
                mShownFrame.set(x, y, x+w, y+h);

                // Now set the alpha...  but because our current hardware
                // can't do alpha transformation on a non-opaque surface,
                // turn it off if we are running an animation that is also
                // transforming since it is more important to have that
                // animation be smooth.
                mShownAlpha = mAlpha;
                if (!PixelFormat.formatHasAlpha(mAttrs.format)
                        || (isIdentityMatrix(mDsDx, mDtDx, mDsDy, mDtDy)
                                && x == frame.left && y == frame.top)) {
                    //Log.i(TAG, "Applying alpha transform");
                    if (selfTransformation) {
                        mShownAlpha *= mTransformation.getAlpha();
                    }
                    if (attachedTransformation) {
                        mShownAlpha *= mAttachedWindow.mTransformation.getAlpha();
                    }
                } else {
                    //Log.i(TAG, "Not applying alpha transform");
                }
                
                if (localLOGV) Log.v(
                    TAG, "Continuing animation in " + this +
                    ": " + mShownFrame +
                    ", alpha=" + mTransformation.getAlpha());
                return;
            }
            
            mShownFrame.set(mFrame);
            mShownAlpha = mAlpha;
            mDsDx = 1;
            mDtDx = 0;
            mDsDy = 0;
            mDtDy = 1;
        }
        
        // Is this window visible?  It is not visible if there is no
        // surface, or we are in the process of running an exit animation
        // that will remove the surface.
        boolean isVisible() {
            final AppWindowToken atoken = mAppToken;
            return mSurface != null && mPolicyVisibility && !mAttachedHidden
                    && (atoken == null || !atoken.hiddenRequested)
                    && !mExiting && !mDestroying;
        }

        // Same as isVisible(), but we also count it as visible between the
        // call to IWindowSession.add() and the first relayout().
        boolean isVisibleOrAdding() {
            final AppWindowToken atoken = mAppToken;
            return (mSurface != null
                            || (!mRelayoutCalled && mViewVisibility == View.VISIBLE))
                    && mPolicyVisibility && !mAttachedHidden
                    && (atoken == null || !atoken.hiddenRequested)
                    && !mExiting && !mDestroying;
        }

        // Is this window currently on-screen?  It is on-screen either if it
        // is visible or it is currently running an animation before no longer
        // being visible.
        boolean isOnScreen() {
            final AppWindowToken atoken = mAppToken;
            if (atoken != null) {
                return mSurface != null && mPolicyVisibility && !mDestroying
                        && ((!mAttachedHidden && !atoken.hiddenRequested)
                                || mAnimating || atoken.animating);
            } else {
                return mSurface != null && mPolicyVisibility && !mDestroying
                        && (!mAttachedHidden || mAnimating);
            }
        }
        
        // Like isOnScreen(), but we don't return true if the window is part
        // of a transition that has not yet been started.
        boolean isReadyForDisplay() {
            final AppWindowToken atoken = mAppToken;
            if (atoken != null) {
                return mSurface != null && mPolicyVisibility && !mDestroying
                        && ((!mAttachedHidden && !atoken.hidden)
                                || mAnimating || atoken.animating);
            } else {
                return mSurface != null && mPolicyVisibility && !mDestroying
                        && (!mAttachedHidden || mAnimating);
            }
        }

        // Is the window or its container currently animating?
        boolean isAnimating() {
            final WindowState attached = mAttachedWindow;
            final AppWindowToken atoken = mAppToken;
            return mAnimation != null
                    || (attached != null && attached.mAnimation != null)
                    || (atoken != null && 
                            (atoken.animation != null
                                    || atoken.inPendingTransaction));
        }

        // Is this window currently animating?
        boolean isWindowAnimating() {
            return mAnimation != null;
        }

        // Like isOnScreen, but returns false if the surface hasn't yet
        // been drawn.
        public boolean isDisplayedLw() {
            final AppWindowToken atoken = mAppToken;
            return mSurface != null && mPolicyVisibility && !mDestroying
                && !mDrawPending && !mCommitDrawPending
                && ((!mAttachedHidden &&
                        (atoken == null || !atoken.hiddenRequested))
                        || mAnimating);
        }

        public boolean fillsScreenLw(int screenWidth, int screenHeight,
                                   boolean shownFrame) {
            if (mSurface == null) {
                return false;
            }
            final Rect frame = shownFrame ? mShownFrame : mFrame;
            if (frame.left <= 0 && frame.top <= 0
                    && frame.right >= screenWidth
                    && frame.bottom >= screenHeight) {
                return true;
            }
            return false;
        }
        
        boolean isFullscreenOpaque(int screenWidth, int screenHeight) {
            if (mAttrs.format != PixelFormat.OPAQUE || mSurface == null
                    || mAnimation != null || mDrawPending || mCommitDrawPending) {
                return false;
            }
            if (mFrame.left <= 0 && mFrame.top <= 0 &&
                mFrame.right >= screenWidth && mFrame.bottom >= screenHeight) {
                return true;
            }
            return false;
        }

        void removeLocked() {
            if (mAttachedWindow != null) {
                mAttachedWindow.mChildWindows.remove(this);
            }
            destroySurfaceLocked();
            mSession.windowRemovedLocked();
            try {
                mClient.asBinder().unlinkToDeath(mDeathRecipient, 0);
            } catch (RuntimeException e) {
                // Ignore if it has already been removed (usually because
                // we are doing this as part of processing a death note.)
            }
        }

        private class DeathRecipient implements IBinder.DeathRecipient {
            public void binderDied() {
                try {
                    synchronized(mWindowMap) {
                        WindowState win = windowForClientLocked(mSession, mClient);
                        Log.i(TAG, "WIN DEATH: " + win);
                        if (win != null) {
                            removeWindowLocked(mSession, win);
                        }
                    }
                } catch (IllegalArgumentException ex) {
                    // This will happen if the window has already been
                    // removed.
                }
            }
        }

        /** Returns true if this window desires key events. */
        public final boolean canReceiveKeys() {
            return     isVisibleOrAdding()
                    && (mViewVisibility == View.VISIBLE)
                    && ((mAttrs.flags & WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE) == 0);
        }

        public boolean hasDrawnLw() {
            return mHasDrawn;
        }

        public void showLw() {
            if (!mPolicyVisibility) {
                mSurfacesChanged = true;
                mPolicyVisibility = true;
                requestAnimationLocked(0);
            }
        }

        public void hideLw() {
            if (mPolicyVisibility) {
                mSurfacesChanged = true;
                mPolicyVisibility = false;
                requestAnimationLocked(0);
            }
        }

        void dump(PrintWriter pw, String prefix) {
            pw.println(prefix + this);
            pw.println(prefix + "mSession=" + mSession
                  + " mClient=" + mClient.asBinder());
            pw.println(prefix + "mAttrs=" + mAttrs);
            pw.println(prefix + "mAttachedWindow=" + mAttachedWindow);
            pw.println(prefix + "mBaseLayer=" + mBaseLayer
                  + " mSubLayer=" + mSubLayer
                  + " mAnimLayer=" + mLayer + "+"
                  + (mAppToken != null ? mAppToken.animLayerAdjustment : 0)
                  + "=" + mAnimLayer
                  + " mLastLayer=" + mLastLayer);
            pw.println(prefix + "mSurface=" + mSurface);
            pw.println(prefix + "mToken=" + mToken);
            pw.println(prefix + "mAppToken=" + mAppToken);
            pw.println(prefix + "mViewVisibility=0x" + Integer.toHexString(mViewVisibility)
                  + " mPolicyVisibility=" + mPolicyVisibility
                  + " mAttachedHidden=" + mAttachedHidden
                  + " mLastHidden=" + mLastHidden
                  + " mHaveFrame=" + mHaveFrame);
            pw.println(prefix + "Requested w=" + mRequestedWidth + " h=" + mRequestedHeight
                  + " x=" + mReqXPos + " y=" + mReqYPos);
            pw.println(prefix + "mShownFrame=" + mShownFrame
                  + " last=" + mLastShownFrame);
            pw.println(prefix + "mFrame=" + mFrame + " last=" + mLastFrame);
            pw.println(prefix + "mContainingFrame=" + mContainingFrame 
                    + " mCoveredInsets=" + mCoveredInsets);
            pw.println(prefix + "mShownAlpha=" + mShownAlpha
                  + " mAlpha=" + mAlpha + " mLastAlpha=" + mLastAlpha);
            pw.println(prefix + "mAnimating=" + mAnimating
                    + " mAnimationIsEntrance=" + mAnimationIsEntrance
                    + " mAnimation=" + mAnimation);
            pw.println(prefix + "mHasTransformation=" + mHasTransformation
                    + " mTransformation=" + mTransformation);
            pw.println(prefix + "mDrawPending=" + mDrawPending
                  + " mCommitDrawPending=" + mCommitDrawPending
                  + " mReadyToShow=" + mReadyToShow
                  + " mHasDrawn=" + mHasDrawn);
            pw.println(prefix + "mExiting=" + mExiting
                    + " mRemoveOnExit=" + mRemoveOnExit
                    + " mDestroying=" + mDestroying);
            pw.println(prefix + "mOrientationChanging=" + mOrientationChanging
                    + " mAppFreezing=" + mAppFreezing);
        }

        @Override
        public String toString() {
            return "Window{"
                + Integer.toHexString(System.identityHashCode(this))
                + " " + mAttrs.getTitle() + "}";
        }

        public void setCoveredInsetsLw(int l, int t, int r, int b) {
            mCoveredInsets.set(l, t, r, b);
        }
    }
    
    // -------------------------------------------------------------
    // Window Token State
    // -------------------------------------------------------------

    class WindowToken {
        // The actual token.
        final IBinder token;

        // If this is an AppWindowToken, this is non-null.
        AppWindowToken appWindowToken;
        
        // All of the windows associated with this token.
        final ArrayList<WindowState> windows = new ArrayList<WindowState>();

        // Is key dispatching paused for this token?
        boolean paused = false;

        WindowToken(IBinder _token) {
            token = _token;
        }

        void dump(PrintWriter pw, String prefix) {
            pw.println(prefix + this);
            pw.println(prefix + "token=" + token);
            pw.println(prefix + "windows=" + windows);
        }

        @Override
        public String toString() {
            return "WindowToken{"
                + Integer.toHexString(System.identityHashCode(this))
                + " token=" + token + "}";
        }
    };

    class AppWindowToken extends WindowToken {
        // Non-null only for application tokens.
        final IApplicationToken appToken;

        // All of the windows and child windows that are included in this
        // application token.  Note this list is NOT sorted!
        final ArrayList<WindowState> allAppWindows = new ArrayList<WindowState>();

        int groupId = -1;
        boolean appFullscreen;
        int requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED;
        
        // These are used for determining when all windows associated with
        // an activity have been drawn, so they can be made visible together
        // at the same time.
        int lastTransactionSequence = mTransactionSequence-1;
        int numInterestingWindows;
        int numDrawnWindows;
        boolean inPendingTransaction;
        boolean allDrawn;
        
        // Is this token going to be hidden in a little while?  If so, it
        // won't be taken into account for setting the screen orientation.
        boolean willBeHidden;
        
        // Should this token's windows be hidden?
        boolean hidden;

        // Is this window's surface needed?  This is almost like hidden, except
        // it will sometimes be true a little earlier: when the token has
        // been shown, but is still waiting for its app transition to execute
        // before making its windows shown.
        boolean hiddenRequested;
        
        // Have we told the window clients to hide themselves?
        boolean clientHidden;
        
        // Temporary for finding which tokens no longer have visible windows.
        boolean hasVisible;

        // Last visibility state we reported to the app token.
        boolean reportedVisible;

        // Set to true when the token has been removed from the window mgr.
        boolean removed;

        // Have we been asked to have this token keep the screen frozen?
        boolean freezingScreen;
        
        boolean animating;
        Animation animation;
        boolean hasTransformation;
        final Transformation transformation = new Transformation();
        
        // Offset to the window of all layers in the token, for use by
        // AppWindowToken animations.
        int animLayerAdjustment;
        
        // Information about an application starting window if displayed.
        StartingData startingData;
        WindowState startingWindow;
        View startingView;
        boolean startingDisplayed;
        boolean startingMoved;
        boolean firstWindowDrawn;

        AppWindowToken(IApplicationToken _token) {
            super(_token.asBinder());
            appWindowToken = this;
            appToken = _token;
        }
        
        public void setAnimation(Animation anim) {
            if (localLOGV) Log.v(
                TAG, "Setting animation in " + this + ": " + anim);
            animation = anim;
            animating = false;
            anim.restrictDuration(MAX_ANIMATION_DURATION);
            anim.scaleCurrentDuration(mTransitionAnimationScale);
            int zorder = anim.getZAdjustment();
            int adj = 0;
            if (zorder == Animation.ZORDER_TOP) {
                adj = TYPE_LAYER_OFFSET;
            } else if (zorder == Animation.ZORDER_BOTTOM) {
                adj = -TYPE_LAYER_OFFSET;
            }
            
            if (animLayerAdjustment != adj) {
                animLayerAdjustment = adj;
                updateLayers();
            }
        }
        
        public void setDummyAnimation() {
            if (animation == null) {
                if (localLOGV) Log.v(
                    TAG, "Setting dummy animation in " + this);
                animation = sDummyAnimation;
            }
        }

        public void clearAnimation() {
            if (animation != null) {
                animation = null;
                animating = true;
            }
        }
        
        void updateLayers() {
            final int N = allAppWindows.size();
            for (int i=0; i<N; i++) {
                WindowState w = allAppWindows.get(i);
                w.mAnimLayer = w.mLayer + animLayerAdjustment;
            }
        }
        
        void sendAppVisibilityToClients() {
            final int N = allAppWindows.size();
            for (int i=0; i<N; i++) {
                WindowState win = allAppWindows.get(i);
                if (win == startingWindow && clientHidden) {
                    // Don't hide the starting window.
                    continue;
                }
                try {
                    if (DEBUG_VISIBILITY) Log.v(TAG,
                            "Setting visibility of " + win + ": " + (!clientHidden));
                    win.mClient.dispatchAppVisibility(!clientHidden);
                } catch (RemoteException e) {
                }
            }
        }
        
        void showAllWindowsLocked() {
            final int NW = allAppWindows.size();
            for (int i=0; i<NW; i++) {
                WindowState w = allAppWindows.get(i);
                if (DEBUG_VISIBILITY) Log.v(TAG,
                        "performing show on: " + w);
                w.performShowLocked();
            }
        }
        
        // This must be called while inside a transaction.
        boolean stepAnimationLocked(long currentTime, int dw, int dh) {
            if (!mDisplayFrozen) {
                // We will run animations as long as the display isn't frozen.
                
                if (animation == sDummyAnimation) {
                    // This guy is going to animate, but not yet.  For now count
                    // it is not animating for purposes of scheduling transactions;
                    // when it is really time to animate, this will be set to
                    // a real animation and the next call will execute normally.
                    return false;
                }
                
                if ((allDrawn || animating || startingDisplayed) && animation != null) {
                    if (!animating) {
                        if (DEBUG_ANIM) Log.v(
                            TAG, "Starting animation in " + this +
                            " @ " + currentTime + ": dw=" + dw + " dh=" + dh
                            + " scale=" + mTransitionAnimationScale
                            + " allDrawn=" + allDrawn + " animating=" + animating);
                        animation.initialize(dw, dh, dw, dh);
                        animation.setStartTime(currentTime);
                        animating = true;
                    }
                    transformation.clear();
                    final boolean more = animation.getTransformation(
                        currentTime, transformation);
                    if (DEBUG_ANIM) Log.v(
                        TAG, "Stepped animation in " + this +
                        ": more=" + more + ", xform=" + transformation);
                    if (more) {
                        // we're done!
                        hasTransformation = true;
                        return true;
                    }
                    if (DEBUG_ANIM) Log.v(
                        TAG, "Finished animation in " + this +
                        " @ " + currentTime);
                    animation = null;
                }
            } else if (animation != null) {
                // If the display is frozen, and there is a pending animation,
                // clear it and make sure we run the cleanup code.
                animating = true;
                animation = null;
            }

            hasTransformation = false;
            
            if (!animating) {
                return false;
            }

            clearAnimation();
            animating = false;

            if (DEBUG_ANIM) Log.v(
                    TAG, "Animation done in " + this
                    + ": reportedVisible=" + reportedVisible);

            transformation.clear();
            if (animLayerAdjustment != 0) {
                animLayerAdjustment = 0;
                updateLayers();
            }
            
            final int N = windows.size();
            for (int i=0; i<N; i++) {
                ((WindowState)windows.get(i)).finishExit();
            }
            updateReportedVisibilityLocked();
            
            return false;
        }

        void updateReportedVisibilityLocked() {
            if (appToken == null) {
                return;
            }
            
            int numInteresting = 0;
            int numVisible = 0;
            boolean nowGone = true;
            
            if (DEBUG_VISIBILITY) Log.v(TAG, "Update reported visibility: " + this);
            final int N = allAppWindows.size();
            for (int i=0; i<N; i++) {
                WindowState win = allAppWindows.get(i);
                if (win == startingWindow || win.mAppFreezing) {
                    continue;
                }
                if (DEBUG_VISIBILITY) {
                    Log.v(TAG, "Win " + win + ": isDisplayed="
                            + win.isDisplayedLw()
                            + ", isAnimating=" + win.isAnimating());
                    if (!win.isDisplayedLw()) {
                        Log.v(TAG, "Not displayed: s=" + win.mSurface
                                + " pv=" + win.mPolicyVisibility
                                + " dp=" + win.mDrawPending
                                + " cdp=" + win.mCommitDrawPending
                                + " ah=" + win.mAttachedHidden
                                + " th="
                                + (win.mAppToken != null
                                        ? win.mAppToken.hiddenRequested : false)
                                + " a=" + win.mAnimating);
                    }
                }
                numInteresting++;
                if (win.isDisplayedLw()) {
                    if (!win.isAnimating()) {
                        numVisible++;
                    }
                    nowGone = false;
                } else if (win.isAnimating()) {
                    nowGone = false;
                }
            }
            
            boolean nowVisible = numInteresting > 0 && numVisible >= numInteresting;
            if (DEBUG_VISIBILITY) Log.v(TAG, "VIS " + this + ": interesting="
                    + numInteresting + " visible=" + numVisible);
            if (nowVisible != reportedVisible) {
                if (DEBUG_VISIBILITY) Log.v(
                        TAG, "Visibility changed in " + this
                        + ": vis=" + nowVisible);
                reportedVisible = nowVisible;
                Message m = mH.obtainMessage(
                        H.REPORT_APPLICATION_TOKEN_WINDOWS,
                        nowVisible ? 1 : 0,
                        nowGone ? 1 : 0,
                        this);
                    mH.sendMessage(m);
            }
        }
        
        void dump(PrintWriter pw, String prefix) {
            super.dump(pw, prefix);
            pw.println(prefix + "app=" + (appToken != null));
            pw.println(prefix + "allAppWindows=" + allAppWindows);
            pw.println(prefix + "groupId=" + groupId
                    + " requestedOrientation=" + requestedOrientation);
            pw.println(prefix + "hidden=" + hidden
                    + " hiddenRequested=" + hiddenRequested
                    + " clientHidden=" + clientHidden
                    + " willBeHidden=" + willBeHidden);
            pw.println(prefix + "paused=" + paused
                    + " freezingScreen=" + freezingScreen);
            pw.println(prefix + "numInterestingWindows=" + numInterestingWindows
                    + " numDrawnWindows=" + numDrawnWindows
                    + " inPendingTransaction=" + inPendingTransaction
                    + " allDrawn=" + allDrawn);
            pw.println(prefix + "hasVisible=" + hasVisible
                    + " reportedVisible=" + reportedVisible);
            pw.println(prefix + "animating=" + animating
                    + " animation=" + animation);
            pw.println(prefix + "animLayerAdjustment=" + animLayerAdjustment
                    + " transformation=" + transformation);
            pw.println(prefix + "startingData=" + startingData
                    + " removed=" + removed
                    + " firstWindowDrawn=" + firstWindowDrawn);
            pw.println(prefix + "startingWindow=" + startingWindow
                    + " startingView=" + startingView
                    + " startingDisplayed=" + startingDisplayed
                    + " startingMoved" + startingMoved);
        }

        @Override
        public String toString() {
            return "AppWindowToken{"
                + Integer.toHexString(System.identityHashCode(this))
                + " token=" + token + "}";
        }
    }
    
    public static WindowManager.LayoutParams findAnimations(
            ArrayList<AppWindowToken> order,
            ArrayList<AppWindowToken> tokenList1,
            ArrayList<AppWindowToken> tokenList2) {
        // We need to figure out which animation to use...
        WindowManager.LayoutParams animParams = null;
        int animSrc = 0;
        
        //Log.i(TAG, "Looking for animations...");
        for (int i=order.size()-1; i>=0; i--) {
            AppWindowToken wtoken = order.get(i);
            //Log.i(TAG, "Token " + wtoken + " with " + wtoken.windows.size() + " windows");
            if (tokenList1.contains(wtoken) || tokenList2.contains(wtoken)) {
                int j = wtoken.windows.size();
                while (j > 0) {
                    j--;
                    WindowState win = wtoken.windows.get(j);
                    //Log.i(TAG, "Window " + win + ": type=" + win.mAttrs.type);
                    if (win.mAttrs.type == WindowManager.LayoutParams.TYPE_BASE_APPLICATION
                            || win.mAttrs.type == WindowManager.LayoutParams.TYPE_APPLICATION_STARTING) {
                        //Log.i(TAG, "Found base or application window, done!");
                        if (wtoken.appFullscreen) {
                            return win.mAttrs;
                        }
                        if (animSrc < 2) {
                            animParams = win.mAttrs;
                            animSrc = 2;
                        }
                    } else if (animSrc < 1 && win.mAttrs.type == WindowManager.LayoutParams.TYPE_APPLICATION) {
                        //Log.i(TAG, "Found normal window, we may use this...");
                        animParams = win.mAttrs;
                        animSrc = 1;
                    }
                }
            }
        }
        
        return animParams;
    }
    
    // -------------------------------------------------------------
    // DummyAnimation
    // -------------------------------------------------------------

    // This is an animation that does nothing: it just immediately finishes
    // itself every time it is called.  It is used as a stub animation in cases
    // where we want to synchronize multiple things that may be animating.
    static final class DummyAnimation extends Animation {
        public boolean getTransformation(long currentTime, Transformation outTransformation) {
            return false;
        }
    }
    static final Animation sDummyAnimation = new DummyAnimation();
    
    // -------------------------------------------------------------
    // Async Handler
    // -------------------------------------------------------------

    static final class StartingData {
        final String pkg;
        final int theme;
        final CharSequence nonLocalizedLabel;
        final int labelRes;
        final int icon;
        
        StartingData(String _pkg, int _theme, CharSequence _nonLocalizedLabel,
                int _labelRes, int _icon) {
            pkg = _pkg;
            theme = _theme;
            nonLocalizedLabel = _nonLocalizedLabel;
            labelRes = _labelRes;
            icon = _icon;
        }
    }

    private final class H extends Handler {
        public static final int REPORT_FOCUS_CHANGE = 2;
        public static final int REPORT_LOSING_FOCUS = 3;
        public static final int ANIMATE = 4;
        public static final int ADD_STARTING = 5;
        public static final int REMOVE_STARTING = 6;
        public static final int FINISHED_STARTING = 7;
        public static final int REPORT_APPLICATION_TOKEN_WINDOWS = 8;
        public static final int UPDATE_ORIENTATION = 10;
        public static final int WINDOW_FREEZE_TIMEOUT = 11;
        public static final int HOLD_SCREEN_CHANGED = 12;
        public static final int APP_TRANSITION_TIMEOUT = 13;
        public static final int PERSIST_ANIMATION_SCALE = 14;
        public static final int FORCE_GC = 15;
        public static final int ENABLE_SCREEN = 16;
        public static final int APP_FREEZE_TIMEOUT = 17;
        
        private Session mLastReportedHold;
        
        public H() {
        }
        
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case REPORT_FOCUS_CHANGE: {
                    WindowState lastFocus;
                    WindowState newFocus;
    
                    synchronized(mWindowMap) {
                        lastFocus = mLastFocus;
                        newFocus = mCurrentFocus;
                        mLastFocus = newFocus;
                        //Log.i(TAG, "Focus moving from " + lastFocus
                        //        + " to " + newFocus);
                        if (newFocus != null && lastFocus != null
                                && !newFocus.isDisplayedLw()) {
                            //Log.i(TAG, "Delaying loss of focus...");
                            mLosingFocus.add(lastFocus);
                            lastFocus = null;
                        }
                    }

                    if (lastFocus != newFocus) {
                        //System.out.println("Changing focus from " + lastFocus
                        //                   + " to " + newFocus);
                        if (newFocus != null) {
                            try {
                                //Log.i(TAG, "Gaining focus: " + newFocus);
                                newFocus.mClient.windowFocusChanged(true, mInTouchMode);
                            } catch (RemoteException e) {
                                // Ignore if process has died.
                            }
                        }

                        if (lastFocus != null) {
                            try {
                                //Log.i(TAG, "Losing focus: " + lastFocus);
                                lastFocus.mClient.windowFocusChanged(false, mInTouchMode);
                            } catch (RemoteException e) {
                                // Ignore if process has died.
                            }
                        }
                    }
                } break;

                case REPORT_LOSING_FOCUS: {
                    ArrayList<WindowState> losers;
    
                    synchronized(mWindowMap) {
                        losers = mLosingFocus;
                        mLosingFocus = new ArrayList<WindowState>();
                    }

                    final int N = losers.size();
                    for (int i=0; i<N; i++) {
                        try {
                            //Log.i(TAG, "Losing delayed focus: " + losers.get(i));
                            losers.get(i).mClient.windowFocusChanged(false, mInTouchMode);
                        } catch (RemoteException e) {
                             // Ignore if process has died.
                        }
                    }
                } break;

                case ANIMATE: {
                    synchronized(mWindowMap) {
                        mAnimationPending = false;
                        performLayoutAndPlaceSurfacesLocked();
                    }
                } break;

                case ADD_STARTING: {
                    final AppWindowToken wtoken = (AppWindowToken)msg.obj;
                    final StartingData sd = wtoken.startingData;

                    if (sd == null) {
                        // Animation has been canceled... do nothing.
                        return;
                    }
                    
                    if (DEBUG_STARTING_WINDOW) Log.v(TAG, "Add starting "
                            + wtoken + ": pkg=" + sd.pkg);
                    
                    View view = null;
                    try {
                        view = mPolicy.addStartingWindow(
                            wtoken.token, sd.pkg,
                            sd.theme, sd.nonLocalizedLabel, sd.labelRes,
                            sd.icon);
                    } catch (Exception e) {
                        Log.w(TAG, "Exception when adding starting window", e);
                    }

                    if (view != null) {
                        boolean abort = false;

                        synchronized(mWindowMap) {
                            if (wtoken.removed || wtoken.startingData == null) {
                                // If the window was successfully added, then
                                // we need to remove it.
                                if (wtoken.startingWindow != null) {
                                    if (DEBUG_STARTING_WINDOW) Log.v(TAG,
                                            "Aborted starting " + wtoken
                                            + ": removed=" + wtoken.removed
                                            + " startingData=" + wtoken.startingData);
                                    wtoken.startingWindow = null;
                                    wtoken.startingData = null;
                                    abort = true;
                                }
                            } else {
                                wtoken.startingView = view;
                            }
                            if (DEBUG_STARTING_WINDOW && !abort) Log.v(TAG,
                                    "Added starting " + wtoken
                                    + ": startingWindow="
                                    + wtoken.startingWindow + " startingView="
                                    + wtoken.startingView);
                        }

                        if (abort) {
                            try {
                                mPolicy.removeStartingWindow(wtoken.token, view);
                            } catch (Exception e) {
                                Log.w(TAG, "Exception when removing starting window", e);
                            }
                        }
                    }
                } break;

                case REMOVE_STARTING: {
                    final AppWindowToken wtoken = (AppWindowToken)msg.obj;
                    IBinder token = null;
                    View view = null;
                    synchronized (mWindowMap) {
                        if (DEBUG_STARTING_WINDOW) Log.v(TAG, "Remove starting "
                                + wtoken + ": startingWindow="
                                + wtoken.startingWindow + " startingView="
                                + wtoken.startingView);
                        if (wtoken.startingWindow != null) {
                            view = wtoken.startingView;
                            token = wtoken.token;
                            wtoken.startingData = null;
                            wtoken.startingView = null;
                            wtoken.startingWindow = null;
                        }
                    }
                    if (view != null) {
                        try {
                            mPolicy.removeStartingWindow(token, view);
                        } catch (Exception e) {
                            Log.w(TAG, "Exception when removing starting window", e);
                        }
                    }
                } break;

                case FINISHED_STARTING: {
                    IBinder token = null;
                    View view = null;
                    while (true) {
                        synchronized (mWindowMap) {
                            final int N = mFinishedStarting.size();
                            if (N <= 0) {
                                break;
                            }
                            AppWindowToken wtoken = mFinishedStarting.remove(N-1);

                            if (DEBUG_STARTING_WINDOW) Log.v(TAG,
                                    "Finished starting " + wtoken
                                    + ": startingWindow=" + wtoken.startingWindow
                                    + " startingView=" + wtoken.startingView);

                            if (wtoken.startingWindow == null) {
                                continue;
                            }

                            view = wtoken.startingView;
                            token = wtoken.token;
                            wtoken.startingData = null;
                            wtoken.startingView = null;
                            wtoken.startingWindow = null;
                        }

                        try {
                            mPolicy.removeStartingWindow(token, view);
                        } catch (Exception e) {
                            Log.w(TAG, "Exception when removing starting window", e);
                        }
                    }
                } break;

                case REPORT_APPLICATION_TOKEN_WINDOWS: {
                    final AppWindowToken wtoken = (AppWindowToken)msg.obj;

                    boolean nowVisible = msg.arg1 != 0;
                    boolean nowGone = msg.arg2 != 0;

                    try {
                        if (DEBUG_VISIBILITY) Log.v(
                                TAG, "Reporting visible in " + wtoken
                                + " visible=" + nowVisible
                                + " gone=" + nowGone);
                        if (nowVisible) {
                            wtoken.appToken.windowsVisible();
                        } else {
                            wtoken.appToken.windowsGone();
                        }
                    } catch (RemoteException ex) {
                    }
                } break;
                
                case UPDATE_ORIENTATION: {
                    setRotationUnchecked(WindowManagerPolicy.USE_LAST_ROTATION, false);
                    break;
                }
                
                case WINDOW_FREEZE_TIMEOUT: {
                    synchronized (mWindowMap) {
                        Log.w(TAG, "Window freeze timeout expired.");
                        int i = mWindows.size();
                        while (i > 0) {
                            i--;
                            WindowState w = (WindowState)mWindows.get(i);
                            if (w.mOrientationChanging) {
                                w.mOrientationChanging = false;
                                Log.w(TAG, "Force clearing orientation change: " + w);
                            }
                        }
                        performLayoutAndPlaceSurfacesLocked();
                    }
                    break;
                }
                
                case HOLD_SCREEN_CHANGED: {
                    Session oldHold;
                    Session newHold;
                    synchronized (mWindowMap) {
                        oldHold = mLastReportedHold;
                        newHold = (Session)msg.obj;
                        mLastReportedHold = newHold;
                    }
                    
                    if (oldHold != newHold) {
                        try {
                            if (oldHold != null) {
                                mBatteryStats.noteStopWakelock(oldHold.mUid,
                                        "window",
                                        BatteryStats.WAKE_TYPE_WINDOW);
                            }
                            if (newHold != null) {
                                mBatteryStats.noteStartWakelock(newHold.mUid,
                                        "window",
                                        BatteryStats.WAKE_TYPE_WINDOW);
                            }
                        } catch (RemoteException e) {
                        }
                    }
                    break;
                }
                
                case APP_TRANSITION_TIMEOUT: {
                    synchronized (mWindowMap) {
                        if (mNextAppTransition != WindowManagerPolicy.TRANSIT_NONE) {
                            if (DEBUG_APP_TRANSITIONS) Log.v(TAG,
                                    "*** APP TRANSITION TIMEOUT");
                            mAppTransitionReady = true;
                            mAppTransitionTimeout = true;
                            performLayoutAndPlaceSurfacesLocked();
                        }
                    }
                    break;
                }
                
                case PERSIST_ANIMATION_SCALE: {
                    Settings.System.putFloat(mContext.getContentResolver(),
                            Settings.System.WINDOW_ANIMATION_SCALE, mWindowAnimationScale);
                    Settings.System.putFloat(mContext.getContentResolver(),
                            Settings.System.TRANSITION_ANIMATION_SCALE, mTransitionAnimationScale);
                    break;
                }
                
                case FORCE_GC: {
                    synchronized(mWindowMap) {
                        if (mAnimationPending) {
                            // If we are animating, don't do the gc now but
                            // delay a bit so we don't interrupt the animation.
                            mH.sendMessageDelayed(mH.obtainMessage(H.FORCE_GC),
                                    2000);
                            return;
                        }
                        // If we are currently rotating the display, it will
                        // schedule a new message when done.
                        if (mDisplayFrozen) {
                            return;
                        }
                        mFreezeGcPending = 0;
                    }
                    Runtime.getRuntime().gc();
                    break;
                }
                
                case ENABLE_SCREEN: {
                    performEnableScreen();
                    break;
                }
                
                case APP_FREEZE_TIMEOUT: {
                    synchronized (mWindowMap) {
                        Log.w(TAG, "App freeze timeout expired.");
                        int i = mAppTokens.size();
                        while (i > 0) {
                            i--;
                            AppWindowToken tok = mAppTokens.get(i);
                            if (tok.freezingScreen) {
                                Log.w(TAG, "Force clearing freeze: " + tok);
                                unsetAppFreezingScreenLocked(tok, true, true);
                            }
                        }
                    }
                    break;
                }
                
            }
        }
    }

    // -------------------------------------------------------------
    // IWindowManager API
    // -------------------------------------------------------------

    public IWindowSession openSession(IBinder token) {
        return new Session(token);
    }

    // -------------------------------------------------------------
    // Internals
    // -------------------------------------------------------------

    final WindowState windowForClientLocked(Session session, IWindow client) {
        return windowForClientLocked(session, client.asBinder());
    }
    
    final WindowState windowForClientLocked(Session session, IBinder client) {
        WindowState win = mWindowMap.get(client);
        if (localLOGV) Log.v(
            TAG, "Looking up client " + client + ": " + win);
        if (win == null) {
            RuntimeException ex = new RuntimeException();
            Log.w(TAG, "Requested window " + client + " does not exist", ex);
            return null;
        }
        if (win.mSession != session) {
            RuntimeException ex = new RuntimeException();
            Log.w(TAG, "Requested window " + client + " is in session " +
                  win.mSession + ", not " + session, ex);
            return null;
        }

        return win;
    }

    private final void assignLayersLocked() {
        if (mInLayout) {
            if (Config.DEBUG) {
                throw new RuntimeException("Recursive call!");
            }
            return;
        }

        int N = mWindows.size();
        int curBaseLayer = 0;
        int curLayer = 0;
        int i;
        
        for (i=0; i<N; i++) {
            WindowState w = (WindowState)mWindows.get(i);
            if (w.mBaseLayer == curBaseLayer) {
                curLayer += WINDOW_LAYER_MULTIPLIER;
                w.mLayer = curLayer;
            } else {
                curBaseLayer = curLayer = w.mBaseLayer;
                w.mLayer = curLayer;
            }
            w.mAnimLayer = w.mAppToken != null
                    ? (w.mLayer + w.mAppToken.animLayerAdjustment) : w.mLayer;
            //System.out.println(
            //    "Assigned layer " + curLayer + " to " + w.mClient.asBinder());
        }
    }

    private boolean mInLayout = false;
    private final void performLayoutAndPlaceSurfacesLocked() {
        if (mInLayout) {
            if (Config.DEBUG) {
                throw new RuntimeException("Recursive call!");
            }
            return;
        }

        boolean recoveringMemory = false;
        if (mForceRemoves != null) {
            recoveringMemory = true;
            // Wait a little it for things to settle down, and off we go.
            for (int i=0; i<mForceRemoves.size(); i++) {
                WindowState ws = mForceRemoves.get(i);
                Log.i(TAG, "Force removing: " + ws);
                removeWindowInnerLocked(ws.mSession, ws);
            }
            mForceRemoves = null;
            Log.w(TAG, "Due to memory failure, waiting a bit for next layout");
            Object tmp = new Object();
            synchronized (tmp) {
                try {
                    tmp.wait(250);
                } catch (InterruptedException e) {
                }
            }
        }
        
        mInLayout = true;
        try {
            performLayoutAndPlaceSurfacesLockedInner(recoveringMemory);
            
            int i = mPendingRemove.size()-1;
            if (i >= 0) {
                while (i >= 0) {
                    WindowState w = mPendingRemove.get(i);
                    removeWindowInnerLocked(w.mSession, w);
                    i--;
                }
                mPendingRemove.clear();

                mInLayout = false;
                assignLayersLocked();
                mLayoutNeeded = true;
                performLayoutAndPlaceSurfacesLocked();

            } else {
                mInLayout = false;
                if (mLayoutNeeded) {
                    requestAnimationLocked(0);
                }
            }
        } catch (RuntimeException e) {
            mInLayout = false;
            Log.e(TAG, "Unhandled exception while layout out windows", e);
        }
    }

    private final void performLayoutLockedInner() {
        final int dw = mDisplay.getWidth();
        final int dh = mDisplay.getHeight();

        final int N = mWindows.size();
        int i;

        // FIRST LOOP: Perform a layout, if needed.
        
        if (mLayoutNeeded) {
            mPolicy.beginLayoutLw(dw, dh);

            // First perform layout of any root windows (not attached
            // to another window).
            int topAttached = -1;
            for (i = N-1; i >= 0; i--) {
                WindowState win = (WindowState) mWindows.get(i);
    
                boolean gone = win.mViewVisibility == View.GONE
                        || !win.mRelayoutCalled;

                // If this view is GONE, then skip it -- keep the current
                // frame, and let the caller know so they can ignore it
                // if they want.  (We do the normal layout for INVISIBLE
                // windows, since that means "perform layout as normal,
                // just don't display").
                if (!gone || !win.mHaveFrame) {
                    if (win.mAttachedWindow == null) {
                        mPolicy.layoutWindowLw(win, win.mAttrs, null);
                    } else {
                        if (topAttached < 0) topAttached = i;
                    }
                }
            }

            // Now perform layout of attached windows, which usually
            // depend on the position of the window they are attached to.
            // XXX does not deal with windows that are attached to windows
            // that are themselves attached.
            for (i = topAttached; i >= 0; i--) {
                WindowState win = (WindowState) mWindows.get(i);

                // If this view is GONE, then skip it -- keep the current
                // frame, and let the caller know so they can ignore it
                // if they want.  (We do the normal layout for INVISIBLE
                // windows, since that means "perform layout as normal,
                // just don't display").
                if ((win.mViewVisibility != View.GONE && win.mRelayoutCalled)
                        || !win.mHaveFrame) {

                    mPolicy.layoutWindowLw(win, win.mAttrs, win.mAttachedWindow);
                }
            }

            mPolicy.finishLayoutLw();
            mLayoutNeeded = false;
        }
    }
    
    private final void performLayoutAndPlaceSurfacesLockedInner(
            boolean recoveringMemory) {
        final long currentTime = SystemClock.uptimeMillis();
        final int dw = mDisplay.getWidth();
        final int dh = mDisplay.getHeight();

        final int N = mWindows.size();
        int i;

        // FIRST LOOP: Perform a layout, if needed.
        
        performLayoutLockedInner();
        
        if (mFxSession == null) {
            mFxSession = new SurfaceSession();
        }
        
        if (SHOW_TRANSACTIONS) Log.i(TAG, ">>> OPEN TRANSACTION");

        // Initialize state of exiting applications.
        for (i=0; i<mExitingAppTokens.size(); i++) {
            mExitingAppTokens.get(i).hasVisible = false;
        }

        // SECOND LOOP: Execute animations and update visibility of windows.
        
        boolean orientationChangeComplete = true;
        Session holdScreen = null;
        boolean focusDisplayed = false;
        boolean animating = false;

        Surface.openTransaction();
        try {
            boolean restart;

            do {
                final int transactionSequence = ++mTransactionSequence;

                // Update animations of all applications.
                boolean tokensAnimating = false;
                final int NAT = mAppTokens.size();
                for (i=0; i<NAT; i++) {
                    if (mAppTokens.get(i).stepAnimationLocked(currentTime, dw, dh)) {
                        tokensAnimating = true;
                    }
                }

                animating = tokensAnimating;
                restart = false;

                boolean tokenMayBeDrawn = false;

                mPolicy.beginAnimationLw(dw, dh);

                for (i=N-1; i>=0; i--) {
                    WindowState w = (WindowState)mWindows.get(i);

                    final WindowManager.LayoutParams attrs = w.mAttrs;

                    if (w.mSurface != null) {
                        // Execute animation.
                        w.commitFinishDrawingLocked(currentTime);
                        if (w.stepAnimationLocked(currentTime, dw, dh)) {
                            animating = true;
                            //w.dump("  ");
                        }

                        mPolicy.animatingWindowLw(w, attrs);
                    }

                    final AppWindowToken atoken = w.mAppToken;
                    if (atoken != null && (!atoken.allDrawn || atoken.freezingScreen)) {
                        if (atoken.lastTransactionSequence != transactionSequence) {
                            atoken.lastTransactionSequence = transactionSequence;
                            atoken.numInterestingWindows = atoken.numDrawnWindows = 0;
                            atoken.startingDisplayed = false;
                        }
                        if ((w.isOnScreen() || w.mAttrs.type
                                == WindowManager.LayoutParams.TYPE_BASE_APPLICATION)
                                && !w.mExiting && !w.mDestroying) {
                            if (DEBUG_VISIBILITY || DEBUG_ORIENTATION) {
                                Log.v(TAG, "Eval win " + w + ": isDisplayed="
                                        + w.isDisplayedLw()
                                        + ", isAnimating=" + w.isAnimating());
                                if (!w.isDisplayedLw()) {
                                    Log.v(TAG, "Not displayed: s=" + w.mSurface
                                            + " pv=" + w.mPolicyVisibility
                                            + " dp=" + w.mDrawPending
                                            + " cdp=" + w.mCommitDrawPending
                                            + " ah=" + w.mAttachedHidden
                                            + " th=" + atoken.hiddenRequested
                                            + " a=" + w.mAnimating);
                                }
                            }
                            if (w != atoken.startingWindow) {
                                if (!atoken.freezingScreen || !w.mAppFreezing) {
                                    atoken.numInterestingWindows++;
                                    if (w.isDisplayedLw()) {
                                        atoken.numDrawnWindows++;
                                        if (DEBUG_VISIBILITY || DEBUG_ORIENTATION) Log.v(TAG,
                                                "tokenMayBeDrawn: " + atoken
                                                + " freezingScreen=" + atoken.freezingScreen
                                                + " mAppFreezing=" + w.mAppFreezing);
                                        tokenMayBeDrawn = true;
                                    }
                                }
                            } else if (w.isDisplayedLw()) {
                                atoken.startingDisplayed = true;
                            }
                        }
                    } else if (w.mReadyToShow) {
                        w.performShowLocked();
                    }
                }

                if (mPolicy.finishAnimationLw()) {
                    restart = true;
                }

                if (tokenMayBeDrawn) {
                    // See if any windows have been drawn, so they (and others
                    // associated with them) can now be shown.
                    final int NT = mTokenList.size();
                    for (i=0; i<NT; i++) {
                        AppWindowToken wtoken = mTokenList.get(i).appWindowToken;
                        if (wtoken == null) {
                            continue;
                        }
                        if (wtoken.freezingScreen) {
                            int numInteresting = wtoken.numInterestingWindows;
                            if (numInteresting > 0 && wtoken.numDrawnWindows >= numInteresting) {
                                if (DEBUG_VISIBILITY) Log.v(TAG,
                                        "allDrawn: " + wtoken
                                        + " interesting=" + numInteresting
                                        + " drawn=" + wtoken.numDrawnWindows);
                                wtoken.showAllWindowsLocked();
                                unsetAppFreezingScreenLocked(wtoken, false, true);
                                orientationChangeComplete = true;
                            }
                        } else if (!wtoken.allDrawn) {
                            int numInteresting = wtoken.numInterestingWindows;
                            if (numInteresting > 0 && wtoken.numDrawnWindows >= numInteresting) {
                                if (DEBUG_VISIBILITY) Log.v(TAG,
                                        "allDrawn: " + wtoken
                                        + " interesting=" + numInteresting
                                        + " drawn=" + wtoken.numDrawnWindows);
                                wtoken.allDrawn = true;
                                restart = true;

                                // We can now show all of the drawn windows!
                                if (!mOpeningApps.contains(wtoken)) {
                                    wtoken.showAllWindowsLocked();
                                }
                            }
                        }
                    }
                }

                // If we are ready to perform an app transition, check through
                // all of the app tokens to be shown and see if they are ready
                // to go.
                if (mAppTransitionReady) {
                    int NN = mOpeningApps.size();
                    boolean goodToGo = true;
                    if (DEBUG_APP_TRANSITIONS) Log.v(TAG,
                            "Checking " + NN + " opening apps (frozen="
                            + mDisplayFrozen + " timeout="
                            + mAppTransitionTimeout + ")...");
                    if (!mDisplayFrozen && !mAppTransitionTimeout) {
                        // If the display isn't frozen, wait to do anything until
                        // all of the apps are ready.  Otherwise just go because
                        // we'll unfreeze the display when everyone is ready.
                        for (i=0; i<NN && goodToGo; i++) {
                            AppWindowToken wtoken = mOpeningApps.get(i);
                            if (DEBUG_APP_TRANSITIONS) Log.v(TAG,
                                    "Check opening app" + wtoken + ": allDrawn="
                                    + wtoken.allDrawn + " startingDisplayed="
                                    + wtoken.startingDisplayed);
                            if (!wtoken.allDrawn && !wtoken.startingDisplayed
                                    && !wtoken.startingMoved) {
                                goodToGo = false;
                            }
                        }
                    }
                    if (goodToGo) {
                        if (DEBUG_APP_TRANSITIONS) Log.v(TAG, "**** GOOD TO GO");
                        int transit = mNextAppTransition;
                        if (mSkipAppTransitionAnimation) {
                            transit = WindowManagerPolicy.TRANSIT_NONE;
                        }
                        mNextAppTransition = WindowManagerPolicy.TRANSIT_NONE;
                        mAppTransitionReady = false;
                        mAppTransitionTimeout = false;
                        mStartingIconInTransition = false;
                        mSkipAppTransitionAnimation = false;

                        mH.removeMessages(H.APP_TRANSITION_TIMEOUT);

                        // We need to figure out which animation to use...
                        WindowManager.LayoutParams lp = findAnimations(mAppTokens,
                                mOpeningApps, mClosingApps);

                        NN = mOpeningApps.size();
                        for (i=0; i<NN; i++) {
                            AppWindowToken wtoken = mOpeningApps.get(i);
                            if (DEBUG_APP_TRANSITIONS) Log.v(TAG,
                                    "Now opening app" + wtoken);
                            wtoken.reportedVisible = false;
                            wtoken.inPendingTransaction = false;
                            setTokenVisibilityLocked(wtoken, lp, true, transit, false);
                            wtoken.updateReportedVisibilityLocked();
                            wtoken.showAllWindowsLocked();
                        }
                        NN = mClosingApps.size();
                        for (i=0; i<NN; i++) {
                            AppWindowToken wtoken = mClosingApps.get(i);
                            if (DEBUG_APP_TRANSITIONS) Log.v(TAG,
                                    "Now closing app" + wtoken);
                            wtoken.inPendingTransaction = false;
                            setTokenVisibilityLocked(wtoken, lp, false, transit, false);
                            wtoken.updateReportedVisibilityLocked();
                            // Force the allDrawn flag, because we want to start
                            // this guy's animations regardless of whether it's
                            // gotten drawn.
                            wtoken.allDrawn = true;
                        }

                        mOpeningApps.clear();
                        mClosingApps.clear();

                        // This has changed the visibility of windows, so perform
                        // a new layout to get them all up-to-date.
                        mLayoutNeeded = true;
                        performLayoutLockedInner();
                        updateFocusedWindowLocked();

                        restart = true;
                    }
                }
            } while (restart);

            // THIRD LOOP: Update the surfaces of all windows.

            final boolean someoneLosingFocus = mLosingFocus.size() != 0;

            mSurfacesChanged = false;
            boolean obscured = false;
            boolean blurring = false;
            boolean dimming = false;
            boolean covered = false;
            int tint = 0;

            for (i=N-1; i>=0; i--) {
                WindowState w = (WindowState)mWindows.get(i);

                boolean displayed = false;
                final WindowManager.LayoutParams attrs = w.mAttrs;
                final int attrFlags = attrs.flags;

                if (w.mSurface != null) {
                    w.computeShownFrameLocked();
                    if (localLOGV) Log.v(
                            TAG, "Placing surface #" + i + " " + w.mSurface
                            + ": new=" + w.mShownFrame + ", old="
                            + w.mLastShownFrame);

                    boolean resize;
                    int width, height;
                    if ((w.mAttrs.flags & w.mAttrs.FLAG_SCALED) != 0) {
                        resize = w.mLastRequestedWidth != w.mRequestedWidth ||
                        w.mLastRequestedHeight != w.mRequestedHeight;
                        // for a scaled surface, we just want to use
                        // the requested size.
                        width  = w.mRequestedWidth;
                        height = w.mRequestedHeight;
                        w.mLastRequestedWidth = width;
                        w.mLastRequestedHeight = height;
                        w.mLastShownFrame.set(w.mShownFrame);
                        try {
                            w.mSurface.setPosition(w.mShownFrame.left, w.mShownFrame.top);
                        } catch (RuntimeException e) {
                            Log.w(TAG, "Error positioning surface in " + w, e);
                            if (!recoveringMemory) {
                                reclaimSomeSurfaceMemoryLocked(w, "position");
                            }
                        }
                    } else {
                        resize = !w.mLastShownFrame.equals(w.mShownFrame);
                        width = w.mShownFrame.width();
                        height = w.mShownFrame.height();
                        w.mLastShownFrame.set(w.mShownFrame);
                        if (resize) {
                            if (SHOW_TRANSACTIONS) Log.i(
                                    TAG, "  SURFACE " + w.mSurface + ": ("
                                    + w.mShownFrame.left + ","
                                    + w.mShownFrame.top + ") ("
                                    + w.mShownFrame.width() + "x"
                                    + w.mShownFrame.height() + ")");
                        }
                    }

                    if (resize) {
                        if (width < 1) width = 1;
                        if (height < 1) height = 1;
                        if (w.mSurface != null) {
                            try {
                                w.mSurface.setSize(width, height);
                                w.mSurface.setPosition(w.mShownFrame.left,
                                        w.mShownFrame.top);
                            } catch (RuntimeException e) {
                                // If something goes wrong with the surface (such
                                // as running out of memory), don't take down the
                                // entire system.
                                Log.e(TAG, "Failure updating surface of " + w
                                        + "size=(" + width + "x" + height
                                        + "), pos=(" + w.mShownFrame.left
                                        + "," + w.mShownFrame.top + ")", e);
                                if (!recoveringMemory) {
                                    reclaimSomeSurfaceMemoryLocked(w, "size");
                                }
                            }
                        }
                    }
                    if (!w.mAppFreezing) {
                        if (!w.mLastFrame.equals(w.mFrame)) {
                            w.mLastFrame.set(w.mFrame);
                            // If the orientation is changing, then we need to
                            // hold off on unfreezing the display until this
                            // window has been redrawn; to do that, we need
                            // to go through the process of getting informed
                            // by the application when it has finished drawing.
                            if (w.mOrientationChanging) {
                                if (DEBUG_ORIENTATION) Log.v(TAG,
                                        "Orientation start waiting for draw in "
                                        + w + ", surface " + w.mSurface);
                                w.mDrawPending = true;
                                w.mCommitDrawPending = false;
                                w.mReadyToShow = false;
                                if (w.mAppToken != null) {
                                    w.mAppToken.allDrawn = false;
                                }
                            }
                            if (DEBUG_ORIENTATION) Log.v(TAG, 
                                    "Resizing window " + w + " to " + w.mFrame);
                            mResizingWindows.add(w);
                        } else if (w.mOrientationChanging) {
                            if (!w.mDrawPending && !w.mCommitDrawPending) {
                                if (DEBUG_ORIENTATION) Log.v(TAG,
                                        "Orientation not waiting for draw in "
                                        + w + ", surface " + w.mSurface);
                                w.mOrientationChanging = false;
                            }
                        }
                    }

                    if (w.mAttachedHidden) {
                        if (!w.mLastHidden) {
                            //dump();
                            w.mLastHidden = true;
                            if (SHOW_TRANSACTIONS) Log.i(
                                    TAG, "  SURFACE " + w.mSurface + ": HIDE (performLayout-attached)");
                            if (w.mSurface != null) {
                                try {
                                    w.mSurface.hide();
                                } catch (RuntimeException e) {
                                    Log.w(TAG, "Exception hiding surface in " + w);
                                }
                            }
                            mKeyWaiter.releasePendingPointerLocked(w.mSession);
                        }
                        // If we are waiting for this window to handle an
                        // orientation change, well, it is hidden, so
                        // doesn't really matter.  Note that this does
                        // introduce a potential glitch if the window
                        // becomes unhidden before it has drawn for the
                        // new orientation.
                        if (w.mOrientationChanging) {
                            w.mOrientationChanging = false;
                            if (DEBUG_ORIENTATION) Log.v(TAG,
                                    "Orientation change skips hidden " + w);
                        }
                    } else if (!w.isReadyForDisplay()) {
                        if (!w.mLastHidden) {
                            //dump();
                            w.mLastHidden = true;
                            if (SHOW_TRANSACTIONS) Log.i(
                                    TAG, "  SURFACE " + w.mSurface + ": HIDE (performLayout-ready)");
                            if (w.mSurface != null) {
                                try {
                                    w.mSurface.hide();
                                } catch (RuntimeException e) {
                                    Log.w(TAG, "Exception exception hiding surface in " + w);
                                }
                            }
                            mKeyWaiter.releasePendingPointerLocked(w.mSession);
                        }
                        // If we are waiting for this window to handle an
                        // orientation change, well, it is hidden, so
                        // doesn't really matter.  Note that this does
                        // introduce a potential glitch if the window
                        // becomes unhidden before it has drawn for the
                        // new orientation.
                        if (w.mOrientationChanging) {
                            w.mOrientationChanging = false;
                            if (DEBUG_ORIENTATION) Log.v(TAG,
                                    "Orientation change skips hidden " + w);
                        }
                    } else if (w.mLastLayer != w.mAnimLayer
                            || w.mLastAlpha != w.mShownAlpha
                            || w.mLastDsDx != w.mDsDx
                            || w.mLastDtDx != w.mDtDx
                            || w.mLastDsDy != w.mDsDy
                            || w.mLastDtDy != w.mDtDy
                            || w.mLastHScale != w.mHScale
                            || w.mLastVScale != w.mVScale
                            || w.mLastHidden) {
                        displayed = true;
                        w.mLastAlpha = w.mShownAlpha;
                        w.mLastLayer = w.mAnimLayer;
                        w.mLastDsDx = w.mDsDx;
                        w.mLastDtDx = w.mDtDx;
                        w.mLastDsDy = w.mDsDy;
                        w.mLastDtDy = w.mDtDy;
                        w.mLastHScale = w.mHScale;
                        w.mLastVScale = w.mVScale;
                        if (SHOW_TRANSACTIONS) Log.i(
                                TAG, "  SURFACE " + w.mSurface + ": alpha="
                                + w.mShownAlpha + " layer=" + w.mAnimLayer);
                        if (w.mSurface != null) {
                            try {
                                w.mSurface.setAlpha(w.mShownAlpha);
                                w.mSurface.setLayer(w.mAnimLayer);
                                w.mSurface.setMatrix(
                                        w.mDsDx*w.mHScale, w.mDtDx*w.mVScale,
                                        w.mDsDy*w.mHScale, w.mDtDy*w.mVScale);
                            } catch (RuntimeException e) {
                                Log.w(TAG, "Error updating surface in " + w, e);
                                if (!recoveringMemory) {
                                    reclaimSomeSurfaceMemoryLocked(w, "update");
                                }
                            }
                        }

                        if (w.mLastHidden && !w.mDrawPending
                                && !w.mCommitDrawPending
                                && !w.mReadyToShow) {
                            if (SHOW_TRANSACTIONS) Log.i(
                                    TAG, "  SURFACE " + w.mSurface + ": SHOW (performLayout)");
                            if (DEBUG_VISIBILITY) Log.v(TAG, "Showing " + w
                                    + " during relayout");
                            if (showSurfaceRobustlyLocked(w)) {
                                w.mHasDrawn = true;
                                w.mLastHidden = false;
                            } else {
                                w.mOrientationChanging = false;
                            }
                        }
                        if (w.mAppToken != null && w.mSurface != null) {
                            w.mAppToken.hasVisible = true;
                        }
                    } else {
                        displayed = true;
                    }

                    if (displayed) {
                        if (!covered) {
                            if (attrs.width == LayoutParams.FILL_PARENT
                                    && attrs.height == LayoutParams.FILL_PARENT) {
                                covered = true;
                            }
                        }
                        if (w.mOrientationChanging) {
                            if (w.mDrawPending || w.mCommitDrawPending) {
                                orientationChangeComplete = false;
                                if (DEBUG_ORIENTATION) Log.v(TAG,
                                        "Orientation continue waiting for draw in " + w);
                            } else {
                                w.mOrientationChanging = false;
                                if (DEBUG_ORIENTATION) Log.v(TAG,
                                        "Orientation change complete in " + w);
                            }
                        }
                        if (w.mAppToken != null) {
                            w.mAppToken.hasVisible = true;
                        }
                    }
                } else if (w.mOrientationChanging) {
                    if (DEBUG_ORIENTATION) Log.v(TAG,
                            "Orientation change skips hidden " + w);
                    w.mOrientationChanging = false;
                }

                final boolean canBeSeen = w.isDisplayedLw();

                if (someoneLosingFocus && w == mCurrentFocus && canBeSeen) {
                    focusDisplayed = true;
                }

                // Update effect.
                if (!obscured) {
                    if (w.mSurface != null &&
                            (attrFlags&FLAG_KEEP_SCREEN_ON) != 0) {
                        holdScreen = w.mSession;
                    }
                    if (w.isFullscreenOpaque(dw, dh)) {
                        // This window completely covers everything behind it,
                        // so we want to leave all of them as unblurred (for
                        // performance reasons).
                        obscured = true;
                    } else if (canBeSeen && !obscured &&
                            (attrFlags&FLAG_BLUR_BEHIND|FLAG_DIM_BEHIND) != 0) {
                        if (localLOGV) Log.v(TAG, "Win " + w
                                + ": blurring=" + blurring
                                + " obscured=" + obscured
                                + " displayed=" + displayed);
                        if (!dimming && (attrFlags&FLAG_DIM_BEHIND) != 0) {
                            //Log.i(TAG, "DIM BEHIND: " + w);
                            dimming = true;
                            mDimShown = true;
                            if (mDimSurface == null) {
                                if (SHOW_TRANSACTIONS) Log.i(TAG, "  DIM "
                                        + mDimSurface + ": CREATE");
                                try {
                                    mDimSurface = new Surface(mFxSession, 0, 
                                            -1, 16, 16,
                                            PixelFormat.OPAQUE,
                                            Surface.FX_SURFACE_DIM);
                                } catch (Exception e) {
                                    Log.e(TAG, "Exception creating Dim surface", e);
                                }
                            }
                            if (SHOW_TRANSACTIONS) Log.i(TAG, "  DIM "
                                    + mDimSurface + ": SHOW pos=(0,0) (" +
                                    dw + "x" + dh + "), layer=" + (w.mAnimLayer-1));
                            if (mDimSurface != null) {
                                try {
                                    mDimSurface.setPosition(0, 0);
                                    mDimSurface.setSize(dw, dh);
                                    mDimSurface.setLayer(w.mAnimLayer-1);
                                    mDimSurface.setAlpha(attrs.dimAmount);
                                    mDimSurface.show();
                                } catch (RuntimeException e) {
                                    Log.w(TAG, "Failure showing dim surface", e);
                                }
                            }
                        }
                        if (!blurring && (attrFlags&FLAG_BLUR_BEHIND) != 0) {
                            //Log.i(TAG, "BLUR BEHIND: " + w);
                            blurring = true;
                            mBlurShown = true;
                            if (mBlurSurface == null) {
                                if (SHOW_TRANSACTIONS) Log.i(TAG, "  BLUR "
                                        + mBlurSurface + ": CREATE");
                                try {
                                    mBlurSurface = new Surface(mFxSession, 0, 
                                            -1, 16, 16,
                                            PixelFormat.OPAQUE,
                                            Surface.FX_SURFACE_BLUR);
                                } catch (Exception e) {
                                    Log.e(TAG, "Exception creating Blur surface", e);
                                }
                            }
                            if (SHOW_TRANSACTIONS) Log.i(TAG, "  BLUR "
                                    + mBlurSurface + ": SHOW pos=(0,0) (" +
                                    dw + "x" + dh + "), layer=" + (w.mAnimLayer-1));
                            if (mBlurSurface != null) {
                                mBlurSurface.setPosition(0, 0);
                                mBlurSurface.setSize(dw, dh);
                                mBlurSurface.setLayer(w.mAnimLayer-2);
                                try {
                                    mBlurSurface.show();
                                } catch (RuntimeException e) {
                                    Log.w(TAG, "Failure showing blur surface", e);
                                }
                            }
                        }
                    }
                }
            }

            if (!dimming && mDimShown) {
                if (SHOW_TRANSACTIONS) Log.i(TAG, "  DIM " + mDimSurface
                        + ": HIDE");
                try {
                    mDimSurface.hide();
                } catch (RuntimeException e) {
                    Log.w(TAG, "Illegal argument exception hiding dim surface");
                }
                mDimShown = false;
            }

            if (!blurring && mBlurShown) {
                if (SHOW_TRANSACTIONS) Log.i(TAG, "  BLUR " + mBlurSurface
                        + ": HIDE");
                try {
                    mBlurSurface.hide();
                } catch (IllegalArgumentException e) {
                    Log.w(TAG, "Illegal argument exception hiding blur surface");
                }
                mBlurShown = false;
            }

            if (SHOW_TRANSACTIONS) Log.i(TAG, "<<< CLOSE TRANSACTION");
        } catch (RuntimeException e) {
            Log.e(TAG, "Unhandled exception in Window Manager", e);
        }

        Surface.closeTransaction();
        
        if (DEBUG_ORIENTATION && mDisplayFrozen) Log.v(TAG,
                "With display frozen, orientationChangeComplete="
                + orientationChangeComplete);
        if (orientationChangeComplete) {
            if (mWindowsFreezingScreen) {
                mWindowsFreezingScreen = false;
                mH.removeMessages(H.WINDOW_FREEZE_TIMEOUT);
            }
            if (mAppsFreezingScreen == 0) {
                stopFreezingDisplayLocked();
            }
        }
        
        i = mResizingWindows.size();
        if (i > 0) {
            do {
                i--;
                WindowState win = mResizingWindows.get(i);
                try {
                    win.mClient.resized(win.mFrame.width(),
                            win.mFrame.height(), win.mDrawPending);
                } catch (RemoteException e) {
                    win.mOrientationChanging = false;
                }
            } while (i > 0);
            mResizingWindows.clear();
        }
        
        // Destroy the surface of any windows that are no longer visible.
        i = mDestroySurface.size();
        if (i > 0) {
            do {
                i--;
                WindowState win = mDestroySurface.get(i);
                win.mDestroying = false;
                win.destroySurfaceLocked();
            } while (i > 0);
            mDestroySurface.clear();
        }

        // Time to remove any exiting applications?
        for (i=0; i<mExitingAppTokens.size(); i++) {
            AppWindowToken token = mExitingAppTokens.get(i);
            if (!token.hasVisible && !mClosingApps.contains(token)) {
                mAppTokens.remove(token);
                mExitingAppTokens.remove(i);
                i--;
                //dump();
            }
        }

        if (focusDisplayed) {
            mH.sendEmptyMessage(H.REPORT_LOSING_FOCUS);
        }
        if (animating) {
            requestAnimationLocked(currentTime+(1000/60)-SystemClock.uptimeMillis());
        }
        mQueue.setHoldScreenLocked(holdScreen != null);
        if (holdScreen != mHoldingScreenOn) {
            mHoldingScreenOn = holdScreen;
            Message m = mH.obtainMessage(H.HOLD_SCREEN_CHANGED, holdScreen);
            mH.sendMessage(m);
        }
    }

    void requestAnimationLocked(long delay) {
        if (!mAnimationPending) {
            mAnimationPending = true;
            mH.sendMessageDelayed(mH.obtainMessage(H.ANIMATE), delay);
        }
    }
    
    /**
     * Have the surface flinger show a surface, robustly dealing wit
     * error conditions.  In particular, if there is not enough memory
     * to show the surface, then we will try to get rid of other surfaces
     * in order to succeed.
     * 
     * @return Returns true if the surface was successfully shown.
     */
    boolean showSurfaceRobustlyLocked(WindowState win) {
        try {
            if (win.mSurface != null) {
                win.mSurface.show();
            }
            return true;
        } catch (RuntimeException e) {
            Log.w(TAG, "Failure showing surface " + win.mSurface + " in " + win);
        }
        
        reclaimSomeSurfaceMemoryLocked(win, "show");
        
        return false;
    }
    
    void reclaimSomeSurfaceMemoryLocked(WindowState win, String operation) {
        final Surface surface = win.mSurface;
        
        EventLog.writeEvent(LOG_WM_NO_SURFACE_MEMORY, win.toString(),
                win.mSession.mPid, operation);
        
        if (mForceRemoves == null) {
            mForceRemoves = new ArrayList<WindowState>();
        }
        
        long callingIdentity = Binder.clearCallingIdentity();
        try {
            // There was some problem...   first, do a sanity check of the
            // window list to make sure we haven't left any dangling surfaces
            // around.
            int N = mWindows.size();
            boolean leakedSurface = false;
            Log.i(TAG, "Out of memory for surface!  Looking for leaks...");
            for (int i=0; i<N; i++) {
                WindowState ws = (WindowState)mWindows.get(i);
                if (ws.mSurface != null) {
                    if (!mSessions.contains(ws.mSession)) {
                        Log.w(TAG, "LEAKED SURFACE (session doesn't exist): "
                                + ws + " surface=" + ws.mSurface
                                + " token=" + win.mToken
                                + " pid=" + ws.mSession.mPid
                                + " uid=" + ws.mSession.mUid);
                        ws.mSurface.clear();
                        ws.mSurface = null;
                        mForceRemoves.add(ws);
                        i--;
                        N--;
                        leakedSurface = true;
                    } else if (win.mAppToken != null && win.mAppToken.clientHidden) {
                        Log.w(TAG, "LEAKED SURFACE (app token hidden): "
                                + ws + " surface=" + ws.mSurface
                                + " token=" + win.mAppToken);
                        ws.mSurface.clear();
                        ws.mSurface = null;
                        leakedSurface = true;
                    }
                }
            }
            
            boolean killedApps = false;
            if (!leakedSurface) {
                Log.w(TAG, "No leaked surfaces; killing applicatons!");
                SparseIntArray pidCandidates = new SparseIntArray();
                for (int i=0; i<N; i++) {
                    WindowState ws = (WindowState)mWindows.get(i);
                    if (ws.mSurface != null) {
                        pidCandidates.append(ws.mSession.mPid, ws.mSession.mPid);
                    }
                }
                if (pidCandidates.size() > 0) {
                    int[] pids = new int[pidCandidates.size()];
                    for (int i=0; i<pids.length; i++) {
                        pids[i] = pidCandidates.keyAt(i);
                    }
                    try {
                        if (mActivityManager.killPidsForMemory(pids)) {
                            killedApps = true;
                        }
                    } catch (RemoteException e) {
                    }
                }
            }
            
            if (leakedSurface || killedApps) {
                // We managed to reclaim some memory, so get rid of the trouble
                // surface and ask the app to request another one.
                Log.w(TAG, "Looks like we have reclaimed some memory, clearing surface for retry.");
                if (surface != null) {
                    surface.clear();
                    win.mSurface = null;
                }
                
                try {
                    win.mClient.dispatchGetNewSurface();
                } catch (RemoteException e) {
                }
            }
        } finally {
            Binder.restoreCallingIdentity(callingIdentity);
        }
    }
    
    private boolean updateFocusedWindowLocked() {
        WindowState newFocus = computeFocusedWindowLocked();
        if (mCurrentFocus != newFocus) {
            // This check makes sure that we don't already have the focus
            // change message pending.
            if (mLastFocus == mCurrentFocus) {
                mH.sendEmptyMessage(H.REPORT_FOCUS_CHANGE);
            }
            if (localLOGV) Log.v(
                TAG, "Changing focus from " + mCurrentFocus + " to " + newFocus);
            mCurrentFocus = newFocus;
            mLosingFocus.remove(newFocus);
            if (newFocus != null) {
                mKeyWaiter.handleNewWindowLocked(newFocus);
            }
            return true;
        }
        return false;
    }

    private WindowState computeFocusedWindowLocked() {
        WindowState result = null;
        WindowState win;

        int i = mWindows.size() - 1;
        int nextAppIndex = mAppTokens.size()-1;
        WindowToken nextApp = nextAppIndex >= 0
            ? mAppTokens.get(nextAppIndex) : null;

        while (i >= 0) {
            win = (WindowState)mWindows.get(i);

            if (localLOGV || DEBUG_FOCUS) Log.v(
                TAG, "Looking for focus: " + i
                + " = " + win
                + ", flags=" + win.mAttrs.flags
                + ", canReceive=" + win.canReceiveKeys());

            AppWindowToken thisApp = win.mAppToken;
            
            // If this window's application has been removed, just skip it.
            if (thisApp != null && thisApp.removed) {
                i--;
                continue;
            }
            
            // If there is a focused app, don't allow focus to go to any
            // windows below it.  If this is an application window, step
            // through the app tokens until we find its app.
            if (thisApp != null && nextApp != null && thisApp != nextApp
                    && win.mAttrs.type != TYPE_APPLICATION_STARTING) {
                int origAppIndex = nextAppIndex;
                while (nextAppIndex > 0) {
                    if (nextApp == mFocusedApp) {
                        // Whoops, we are below the focused app...  no focus
                        // for you!
                        if (localLOGV || DEBUG_FOCUS) Log.v(
                            TAG, "Reached focused app: " + mFocusedApp);
                        return null;
                    }
                    nextAppIndex--;
                    nextApp = mAppTokens.get(nextAppIndex);
                    if (nextApp == thisApp) {
                        break;
                    }
                }
                if (thisApp != nextApp) {
                    // Uh oh, the app token doesn't exist!  This shouldn't
                    // happen, but if it does we can get totally hosed...
                    // so restart at the original app.
                    nextAppIndex = origAppIndex;
                    nextApp = mAppTokens.get(nextAppIndex);
                }
            }

            // Dispatch to this window if it is wants key events.
            if (win.canReceiveKeys()) {
                if (DEBUG_FOCUS) Log.v(
                        TAG, "Found focus @ " + i + " = " + win);
                result = win;
                break;
            }

            i--;
        }

        return result;
    }

    private void startFreezingDisplayLocked() {
        if (mDisplayFrozen) {
            return;
        }
        
        long now = SystemClock.uptimeMillis();
        //Log.i(TAG, "Freezing, gc pending: " + mFreezeGcPending + ", now " + now);
        if (mFreezeGcPending != 0) {
            if (now > (mFreezeGcPending+1000)) {
                //Log.i(TAG, "Gc!  " + now + " > " + (mFreezeGcPending+1000));
                mH.removeMessages(H.FORCE_GC);
                Runtime.getRuntime().gc();
                mFreezeGcPending = now;
            }
        } else {
            mFreezeGcPending = now;
        }
        
        mDisplayFrozen = true;
        if (mNextAppTransition != WindowManagerPolicy.TRANSIT_NONE) {
            mNextAppTransition = WindowManagerPolicy.TRANSIT_NONE;
            mAppTransitionReady = true;
        }
        
        if (PROFILE_ORIENTATION) {
            File file = new File("/data/system/frozen");
            Debug.startMethodTracing(file.toString(), 8 * 1024 * 1024);
        }
        Surface.freezeDisplay(0);
    }
    
    private void stopFreezingDisplayLocked() {
        if (!mDisplayFrozen) {
            return;
        }
        
        mDisplayFrozen = false;
        mH.removeMessages(H.APP_FREEZE_TIMEOUT);
        if (PROFILE_ORIENTATION) {
            Debug.stopMethodTracing();
        }
        Surface.unfreezeDisplay(0);
        
        // Freezing the display also suspends key event delivery, to
        // keep events from going astray while the display is reconfigured.
        // Now that we're back, notify the key waiter that we're alive
        // again and it should restart its timeouts.
        synchronized (mKeyWaiter) {
            mKeyWaiter.mWasFrozen = true;
            mKeyWaiter.notifyAll();
        }

        // A little kludge: a lot could have happened while the
        // display was frozen, so now that we are coming back we
        // do a gc so that any remote references the system
        // processes holds on others can be released if they are
        // no longer needed.
        mH.removeMessages(H.FORCE_GC);
        mH.sendMessageDelayed(mH.obtainMessage(H.FORCE_GC),
                2000);
    }
    
    @Override
    public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
        if (mContext.checkCallingOrSelfPermission("android.permission.DUMP")
                != PackageManager.PERMISSION_GRANTED) {
            pw.println("Permission Denial: can't dump WindowManager from from pid="
                    + Binder.getCallingPid()
                    + ", uid=" + Binder.getCallingUid());
            return;
        }
        
        synchronized(mWindowMap) {
            pw.println("Current Window Manager state:");
            for (int i=mWindows.size()-1; i>=0; i--) {
                WindowState w = (WindowState)mWindows.get(i);
                pw.println("  Window #" + i + ":");
                w.dump(pw, "    ");
            }
            if (mPendingRemove.size() > 0) {
                pw.println(" ");
                pw.println("  Remove pending for:");
                for (int i=mPendingRemove.size()-1; i>=0; i--) {
                    WindowState w = mPendingRemove.get(i);
                    pw.println("  Remove #" + i + ":");
                    w.dump(pw, "    ");
                }
            }
            if (mDestroySurface.size() > 0) {
                pw.println(" ");
                pw.println("  Windows waiting to destroy their surface:");
                for (int i=mDestroySurface.size()-1; i>=0; i--) {
                    WindowState w = mDestroySurface.get(i);
                    pw.println("  Destroy #" + i + ":");
                    w.dump(pw, "    ");
                }
            }
            if (mLosingFocus.size() > 0) {
                pw.println(" ");
                pw.println("  Windows losing focus:");
                for (int i=mLosingFocus.size()-1; i>=0; i--) {
                    WindowState w = mLosingFocus.get(i);
                    pw.println("  Losing #" + i + ":");
                    w.dump(pw, "    ");
                }
            }
            if (mSessions.size() > 0) {
                pw.println(" ");
                pw.println("  All active sessions:");
                Iterator<Session> it = mSessions.iterator();
                while (it.hasNext()) {
                    Session s = it.next();
                    pw.println("  Session " + s);
                    s.dump(pw, "    ");
                }
            }
            if (mTokenMap.size() > 0) {
                pw.println(" ");
                pw.println("  All tokens:");
                Iterator<WindowToken> it = mTokenMap.values().iterator();
                while (it.hasNext()) {
                    WindowToken token = it.next();
                    pw.println("  Token " + token.token);
                    token.dump(pw, "    ");
                }
            }
            if (mAppTokens.size() > 0) {
                pw.println(" ");
                pw.println("  Application tokens in Z order:");
                for (int i=mAppTokens.size()-1; i>=0; i--) {
                    WindowToken token = mAppTokens.get(i);
                    pw.println("  App Token #" + i + ":");
                    token.dump(pw, "    ");
                }
            }
            if (mFinishedStarting.size() > 0) {
                pw.println(" ");
                pw.println("  Finishing start of application tokens:");
                for (int i=mFinishedStarting.size()-1; i>=0; i--) {
                    WindowToken token = mFinishedStarting.get(i);
                    pw.println("  Finish Starting App Token #" + i + ":");
                    token.dump(pw, "    ");
                }
            }
            if (mExitingAppTokens.size() > 0) {
                pw.println(" ");
                pw.println("  Exiting application tokens:");
                for (int i=mExitingAppTokens.size()-1; i>=0; i--) {
                    WindowToken token = mExitingAppTokens.get(i);
                    pw.println("  Exiting App Token #" + i + ":");
                    token.dump(pw, "    ");
                }
            }
            pw.println(" ");
            pw.println("  mCurrentFocus=" + mCurrentFocus);
            pw.println("  mLastFocus=" + mLastFocus);
            pw.println("  mFocusedApp=" + mFocusedApp);
            pw.println("  mInTouchMode=" + mInTouchMode);
            pw.println("  mSystemBooted=" + mSystemBooted
                    + " mDisplayEnabled=" + mDisplayEnabled);
            pw.println("  mLayoutNeeded=" + mLayoutNeeded
                    + " mSurfacesChanged=" + mSurfacesChanged
                    + " mBlurShown=" + mBlurShown
                    + " mDimShown=" + mDimShown);
            pw.println("  mDisplayFrozen=" + mDisplayFrozen
                    + " mWindowsFreezingScreen=" + mWindowsFreezingScreen
                    + " mAppsFreezingScreen=" + mAppsFreezingScreen);
            pw.println("  mRotation=" + mRotation
                    + ", mForcedAppOrientation=" + mForcedAppOrientation
                    + ", mRequestedRotation=" + mRequestedRotation);
            pw.println("  mAnimationPending=" + mAnimationPending
                    + " mWindowAnimationScale=" + mWindowAnimationScale
                    + " mTransitionWindowAnimationScale=" + mTransitionAnimationScale);
            pw.println("  mNextAppTransition=0x"
                    + Integer.toHexString(mNextAppTransition)
                    + ", mAppTransitionReady=" + mAppTransitionReady
                    + ", mAppTransitionTimeout=" + mAppTransitionTimeout);
            pw.println("  mStartingIconInTransition=" + mStartingIconInTransition
                    + ", mSkipAppTransitionAnimation=" + mSkipAppTransitionAnimation);
            pw.println("  mOpeningApps=" + mOpeningApps);
                    pw.println("  mClosingApps=" + mClosingApps);
            pw.println("  DisplayWidth=" + mDisplay.getWidth()
                    + " DisplayHeight=" + mDisplay.getHeight());
            pw.println("  KeyWaiter state:");
            pw.println("    mLastWin=" + mKeyWaiter.mLastWin
                    + " mLastBinder=" + mKeyWaiter.mLastBinder);
            pw.println("    mFinished=" + mKeyWaiter.mFinished
                    + " mGotFirstWindow=" + mKeyWaiter.mGotFirstWindow
                    + " mEventDispatching" + mKeyWaiter.mEventDispatching
                    + " mTimeToSwitch=" + mKeyWaiter.mTimeToSwitch);
        }
    }

    public void monitor() {
        synchronized (mWindowMap) { }
        synchronized (mKeyguardDisabled) { }
        synchronized (mKeyWaiter) { }
    }
}