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

 /*
  * Copyright (C) 2012 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package com.android.server.wm;

 import static com.android.server.am.ActivityStackSupervisor.HOME_STACK_ID;
 import static com.android.server.wm.WindowManagerService.DEBUG_VISIBILITY;
 import static com.android.server.wm.WindowManagerService.TAG;

 import android.graphics.Rect;
 import android.graphics.Region;
 import android.util.Slog;
 import android.view.Display;
 import android.view.DisplayInfo;
 import android.view.Surface;

 import java.io.PrintWriter;
 import java.util.ArrayList;

 class DisplayContentList extends ArrayList<DisplayContent> {
 }

 /**
  * Utility class for keeping track of the WindowStates and other pertinent contents of a
  * particular Display.
  *
  * IMPORTANT: No method from this class should ever be used without holding
  * WindowManagerService.mWindowMap.
  */
 class DisplayContent {

     /** Unique identifier of this stack. */
     private final int mDisplayId;

     /** Z-ordered (bottom-most first) list of all Window objects. Assigned to an element
      * from mDisplayWindows; */
     private final WindowList mWindows = new WindowList();

     // This protects the following display size properties, so that
     // getDisplaySize() doesn't need to acquire the global lock.  This is
     // needed because the window manager sometimes needs to use ActivityThread
     // while it has its global state locked (for example to load animation
     // resources), but the ActivityThread also needs get the current display
     // size sometimes when it has its package lock held.
     //
     // These will only be modified with both mWindowMap and mDisplaySizeLock
     // held (in that order) so the window manager doesn't need to acquire this
     // lock when needing these values in its normal operation.
     final Object mDisplaySizeLock = new Object();
     int mInitialDisplayWidth = 0;
     int mInitialDisplayHeight = 0;
     int mInitialDisplayDensity = 0;
     int mBaseDisplayWidth = 0;
     int mBaseDisplayHeight = 0;
     int mBaseDisplayDensity = 0;
     private final DisplayInfo mDisplayInfo = new DisplayInfo();
     private final Display mDisplay;

     Rect mBaseDisplayRect = new Rect();
     Rect mContentRect = new Rect();

     // Accessed directly by all users.
     boolean layoutNeeded;
     int pendingLayoutChanges;
     final boolean isDefaultDisplay;

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

     /** Array containing all TaskStacks on this display.  Array
      * is stored in display order with the current bottom stack at 0. */
     private final ArrayList<TaskStack> mStacks = new ArrayList<TaskStack>();

     /** A special TaskStack with id==HOME_STACK_ID that moves to the bottom whenever any TaskStack
      * (except a future lockscreen TaskStack) moves to the top. */
     private TaskStack mHomeStack = null;

     /** Detect user tapping outside of current focused stack bounds .*/
     StackTapPointerEventListener mTapDetector;

     /** Detect user tapping outside of current focused stack bounds .*/
     Region mTouchExcludeRegion = new Region();

     /** Save allocating when calculating rects */
     Rect mTmpRect = new Rect();

     /** For gathering Task objects in order. */
     final ArrayList<Task> mTmpTaskHistory = new ArrayList<Task>();

     final WindowManagerService mService;

     /** Remove this display when animation on it has completed. */
     boolean mDeferredRemoval;

     /**
      * @param display May not be null.
      * @param service You know.
      */
     DisplayContent(Display display, WindowManagerService service) {
         mDisplay = display;
         mDisplayId = display.getDisplayId();
         display.getDisplayInfo(mDisplayInfo);
         isDefaultDisplay = mDisplayId == Display.DEFAULT_DISPLAY;
         mService = service;
     }

     int getDisplayId() {
         return mDisplayId;
     }

     WindowList getWindowList() {
         return mWindows;
     }

     Display getDisplay() {
         return mDisplay;
     }

     DisplayInfo getDisplayInfo() {
         return mDisplayInfo;
     }

     /**
      * Returns true if the specified UID has access to this display.
      */
     public boolean hasAccess(int uid) {
         return mDisplay.hasAccess(uid);
     }

     public boolean isPrivate() {
         return (mDisplay.getFlags() & Display.FLAG_PRIVATE) != 0;
     }

     ArrayList<TaskStack> getStacks() {
         return mStacks;
     }

     /**
      * Retrieve the tasks on this display in stack order from the bottommost TaskStack up.
      * @return All the Tasks, in order, on this display.
      */
     ArrayList<Task> getTasks() {
         mTmpTaskHistory.clear();
         final int numStacks = mStacks.size();
         for (int stackNdx = 0; stackNdx < numStacks; ++stackNdx) {
             mTmpTaskHistory.addAll(mStacks.get(stackNdx).getTasks());
         }
         return mTmpTaskHistory;
     }

     TaskStack getHomeStack() {
         if (mHomeStack == null && mDisplayId == Display.DEFAULT_DISPLAY) {
             Slog.e(TAG, "getHomeStack: Returning null from this=" + this);
         }
         return mHomeStack;
     }

     void updateDisplayInfo() {
         mDisplay.getDisplayInfo(mDisplayInfo);
         for (int i = mStacks.size() - 1; i >= 0; --i) {
             mStacks.get(i).updateDisplayInfo();
         }
     }

     void getLogicalDisplayRect(Rect out) {
         // Uses same calculation as in LogicalDisplay#configureDisplayInTransactionLocked.
         final int orientation = mDisplayInfo.rotation;
         boolean rotated = (orientation == Surface.ROTATION_90
                 || orientation == Surface.ROTATION_270);
         final int physWidth = rotated ? mBaseDisplayHeight : mBaseDisplayWidth;
         final int physHeight = rotated ? mBaseDisplayWidth : mBaseDisplayHeight;
         int width = mDisplayInfo.logicalWidth;
         int left = (physWidth - width) / 2;
         int height = mDisplayInfo.logicalHeight;
         int top = (physHeight - height) / 2;
         out.set(left, top, left + width, top + height);
     }

     /** Refer to {@link WindowManagerService#attachStack(int, int)} */
     void attachStack(TaskStack stack) {
         if (stack.mStackId == HOME_STACK_ID) {
             if (mHomeStack != null) {
                 throw new IllegalArgumentException("attachStack: HOME_STACK_ID (0) not first.");
             }
             mHomeStack = stack;
         }
         mStacks.add(stack);
         layoutNeeded = true;
     }

     void moveStack(TaskStack stack, boolean toTop) {
         mStacks.remove(stack);
         mStacks.add(toTop ? mStacks.size() : 0, stack);
     }

     void detachStack(TaskStack stack) {
         mStacks.remove(stack);
     }

     /**
      * Propagate the new bounds to all child stacks.
      * @param contentRect The bounds to apply at the top level.
      */
     void resize(Rect contentRect) {
         mContentRect.set(contentRect);
     }

     int stackIdFromPoint(int x, int y) {
         for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
             final TaskStack stack = mStacks.get(stackNdx);
             stack.getBounds(mTmpRect);
             if (mTmpRect.contains(x, y)) {
                 return stack.mStackId;
             }
         }
         return -1;
     }

     void setTouchExcludeRegion(TaskStack focusedStack) {
         mTouchExcludeRegion.set(mBaseDisplayRect);
         WindowList windows = getWindowList();
         for (int i = windows.size() - 1; i >= 0; --i) {
             final WindowState win = windows.get(i);
             final TaskStack stack = win.getStack();
             if (win.isVisibleLw() && stack != null && stack != focusedStack) {
                 mTmpRect.set(win.mVisibleFrame);
                 mTmpRect.intersect(win.mVisibleInsets);
                 mTouchExcludeRegion.op(mTmpRect, Region.Op.DIFFERENCE);
             }
         }
     }

     void switchUserStacks(int newUserId) {
         final WindowList windows = getWindowList();
         for (int i = 0; i < windows.size(); i++) {
             final WindowState win = windows.get(i);
             if (win.isHiddenFromUserLocked()) {
                 if (DEBUG_VISIBILITY) Slog.w(TAG, "user changing " + newUserId + " hiding "
                         + win + ", attrs=" + win.mAttrs.type + ", belonging to "
                         + win.mOwnerUid);
                 win.hideLw(false);
             }
         }

         for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
             mStacks.get(stackNdx).switchUser(newUserId);
         }
     }

     void resetAnimationBackgroundAnimator() {
         for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
             mStacks.get(stackNdx).resetAnimationBackgroundAnimator();
         }
     }

     boolean animateDimLayers() {
         boolean result = false;
         for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
             result |= mStacks.get(stackNdx).animateDimLayers();
         }
         return result;
     }

     void resetDimming() {
         for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
             mStacks.get(stackNdx).resetDimmingTag();
         }
     }

     boolean isDimming() {
         for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
             if (mStacks.get(stackNdx).isDimming()) {
                 return true;
             }
         }
         return false;
     }

     void stopDimmingIfNeeded() {
         for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
             mStacks.get(stackNdx).stopDimmingIfNeeded();
         }
     }

     void close() {
         for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
             mStacks.get(stackNdx).close();
         }
     }

     boolean isAnimating() {
         for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
             final TaskStack stack = mStacks.get(stackNdx);
             if (stack.isAnimating()) {
                 return true;
             }
         }
         return false;
     }

     void checkForDeferredActions() {
         boolean animating = false;
         for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
             final TaskStack stack = mStacks.get(stackNdx);
             if (stack.isAnimating()) {
                 animating = true;
             } else {
                 if (stack.mDeferDetach) {
                     mService.detachStackLocked(this, stack);
                 }
                 final ArrayList<Task> tasks = stack.getTasks();
                 for (int taskNdx = tasks.size() - 1; taskNdx >= 0; --taskNdx) {
                     final Task task = tasks.get(taskNdx);
                     AppTokenList tokens = task.mAppTokens;
                     for (int tokenNdx = tokens.size() - 1; tokenNdx >= 0; --tokenNdx) {
                         AppWindowToken wtoken = tokens.get(tokenNdx);
                         if (wtoken.mDeferRemoval) {
                             stack.mExitingAppTokens.remove(wtoken);
                             wtoken.mDeferRemoval = false;
                             mService.removeAppFromTaskLocked(wtoken);
                         }
                     }
                     if (task.mDeferRemoval) {
                         task.mDeferRemoval = false;
                         mService.removeTaskLocked(task);
                     }
                 }
             }
         }
         if (!animating && mDeferredRemoval) {
             mService.onDisplayRemoved(mDisplayId);
         }
     }

     public void dump(String prefix, PrintWriter pw) {
         pw.print(prefix); pw.print("Display: mDisplayId="); pw.println(mDisplayId);
         final String subPrefix = "  " + prefix;
         pw.print(subPrefix); pw.print("init="); pw.print(mInitialDisplayWidth); pw.print("x");
             pw.print(mInitialDisplayHeight); pw.print(" "); pw.print(mInitialDisplayDensity);
             pw.print("dpi");
             if (mInitialDisplayWidth != mBaseDisplayWidth
                     || mInitialDisplayHeight != mBaseDisplayHeight
                     || mInitialDisplayDensity != mBaseDisplayDensity) {
                 pw.print(" base=");
                 pw.print(mBaseDisplayWidth); pw.print("x"); pw.print(mBaseDisplayHeight);
                 pw.print(" "); pw.print(mBaseDisplayDensity); pw.print("dpi");
             }
             pw.print(" cur=");
             pw.print(mDisplayInfo.logicalWidth);
             pw.print("x"); pw.print(mDisplayInfo.logicalHeight);
             pw.print(" app=");
             pw.print(mDisplayInfo.appWidth);
             pw.print("x"); pw.print(mDisplayInfo.appHeight);
             pw.print(" rng="); pw.print(mDisplayInfo.smallestNominalAppWidth);
             pw.print("x"); pw.print(mDisplayInfo.smallestNominalAppHeight);
             pw.print("-"); pw.print(mDisplayInfo.largestNominalAppWidth);
             pw.print("x"); pw.println(mDisplayInfo.largestNominalAppHeight);
             pw.print(subPrefix); pw.print("deferred="); pw.print(mDeferredRemoval);
                 pw.print(" layoutNeeded="); pw.println(layoutNeeded);
         for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
             final TaskStack stack = mStacks.get(stackNdx);
             pw.print(prefix); pw.print("mStacks[" + stackNdx + "]"); pw.println(stack.mStackId);
             stack.dump(prefix + "  ", pw);
         }
         pw.println();
         pw.println("  Application tokens in bottom up Z order:");
         int ndx = 0;
         final int numStacks = mStacks.size();
         for (int stackNdx = 0; stackNdx < numStacks; ++stackNdx) {
             ArrayList<Task> tasks = mStacks.get(stackNdx).getTasks();
             for (int taskNdx = tasks.size() - 1; taskNdx >= 0; --taskNdx) {
                 AppTokenList tokens = tasks.get(taskNdx).mAppTokens;
                 for (int tokenNdx = tokens.size() - 1; tokenNdx >= 0; --tokenNdx) {
                     final AppWindowToken wtoken = tokens.get(tokenNdx);
                     pw.print("  App #"); pw.print(ndx++);
                             pw.print(' '); pw.print(wtoken); pw.println(":");
                     wtoken.dump(pw, "    ");
                 }
             }
         }
         if (ndx == 0) {
             pw.println("    None");
         }
         pw.println();
         if (!mExitingTokens.isEmpty()) {
             pw.println();
             pw.println("  Exiting tokens:");
             for (int i=mExitingTokens.size()-1; i>=0; i--) {
                 WindowToken token = mExitingTokens.get(i);
                 pw.print("  Exiting #"); pw.print(i);
                 pw.print(' '); pw.print(token);
                 pw.println(':');
                 token.dump(pw, "    ");
             }
         }
         pw.println();
     }

     @Override
     public String toString() {
         return "Display " + mDisplayId + " info=" + mDisplayInfo + " stacks=" + mStacks;
     }
 }
	/*
	* Copyright (C) 2012 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package com.android.server.wm;

	import static com.android.server.am.ActivityStackSupervisor.HOME_STACK_ID;
	import static com.android.server.wm.WindowManagerService.DEBUG_VISIBILITY;
	import static com.android.server.wm.WindowManagerService.TAG;

	import android.graphics.Rect;
	import android.graphics.Region;
	import android.util.Slog;
	import android.view.Display;
	import android.view.DisplayInfo;
	import android.view.Surface;

	import java.io.PrintWriter;
	import java.util.ArrayList;

	class DisplayContentList extends ArrayList<DisplayContent> {
	}

	/**
	* Utility class for keeping track of the WindowStates and other pertinent contents of a
	* particular Display.
	*
	* IMPORTANT: No method from this class should ever be used without holding
	* WindowManagerService.mWindowMap.
	*/
	class DisplayContent {

	/** Unique identifier of this stack. */
	private final int mDisplayId;

	/** Z-ordered (bottom-most first) list of all Window objects. Assigned to an element
	* from mDisplayWindows; */
	private final WindowList mWindows = new WindowList();

	// This protects the following display size properties, so that
	// getDisplaySize() doesn't need to acquire the global lock. This is
	// needed because the window manager sometimes needs to use ActivityThread
	// while it has its global state locked (for example to load animation
	// resources), but the ActivityThread also needs get the current display
	// size sometimes when it has its package lock held.
	//
	// These will only be modified with both mWindowMap and mDisplaySizeLock
	// held (in that order) so the window manager doesn't need to acquire this
	// lock when needing these values in its normal operation.
	final Object mDisplaySizeLock = new Object();
	int mInitialDisplayWidth = 0;
	int mInitialDisplayHeight = 0;
	int mInitialDisplayDensity = 0;
	int mBaseDisplayWidth = 0;
	int mBaseDisplayHeight = 0;
	int mBaseDisplayDensity = 0;
	private final DisplayInfo mDisplayInfo = new DisplayInfo();
	private final Display mDisplay;

	Rect mBaseDisplayRect = new Rect();
	Rect mContentRect = new Rect();

	// Accessed directly by all users.
	boolean layoutNeeded;
	int pendingLayoutChanges;
	final boolean isDefaultDisplay;

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

	/** Array containing all TaskStacks on this display. Array
	* is stored in display order with the current bottom stack at 0. */
	private final ArrayList<TaskStack> mStacks = new ArrayList<TaskStack>();

	/** A special TaskStack with id==HOME_STACK_ID that moves to the bottom whenever any TaskStack
	* (except a future lockscreen TaskStack) moves to the top. */
	private TaskStack mHomeStack = null;

	/** Detect user tapping outside of current focused stack bounds .*/
	StackTapPointerEventListener mTapDetector;

	/** Detect user tapping outside of current focused stack bounds .*/
	Region mTouchExcludeRegion = new Region();

	/** Save allocating when calculating rects */
	Rect mTmpRect = new Rect();

	/** For gathering Task objects in order. */
	final ArrayList<Task> mTmpTaskHistory = new ArrayList<Task>();

	final WindowManagerService mService;

	/** Remove this display when animation on it has completed. */
	boolean mDeferredRemoval;

	/**
	* @param display May not be null.
	* @param service You know.
	*/
	DisplayContent(Display display, WindowManagerService service) {
	mDisplay = display;
	mDisplayId = display.getDisplayId();
	display.getDisplayInfo(mDisplayInfo);
	isDefaultDisplay = mDisplayId == Display.DEFAULT_DISPLAY;
	mService = service;
	}

	int getDisplayId() {
	return mDisplayId;
	}

	WindowList getWindowList() {
	return mWindows;
	}

	Display getDisplay() {
	return mDisplay;
	}

	DisplayInfo getDisplayInfo() {
	return mDisplayInfo;
	}

	/**
	* Returns true if the specified UID has access to this display.
	*/
	public boolean hasAccess(int uid) {
	return mDisplay.hasAccess(uid);
	}

	public boolean isPrivate() {
	return (mDisplay.getFlags() & Display.FLAG_PRIVATE) != 0;
	}

	ArrayList<TaskStack> getStacks() {
	return mStacks;
	}

	/**
	* Retrieve the tasks on this display in stack order from the bottommost TaskStack up.
	* @return All the Tasks, in order, on this display.
	*/
	ArrayList<Task> getTasks() {
	mTmpTaskHistory.clear();
	final int numStacks = mStacks.size();
	for (int stackNdx = 0; stackNdx < numStacks; ++stackNdx) {
	mTmpTaskHistory.addAll(mStacks.get(stackNdx).getTasks());
	}
	return mTmpTaskHistory;
	}

	TaskStack getHomeStack() {
	if (mHomeStack == null && mDisplayId == Display.DEFAULT_DISPLAY) {
	Slog.e(TAG, "getHomeStack: Returning null from this=" + this);
	}
	return mHomeStack;
	}

	void updateDisplayInfo() {
	mDisplay.getDisplayInfo(mDisplayInfo);
	for (int i = mStacks.size() - 1; i >= 0; --i) {
	mStacks.get(i).updateDisplayInfo();
	}
	}

	void getLogicalDisplayRect(Rect out) {
	// Uses same calculation as in LogicalDisplay#configureDisplayInTransactionLocked.
	final int orientation = mDisplayInfo.rotation;
	boolean rotated = (orientation == Surface.ROTATION_90
	\|\| orientation == Surface.ROTATION_270);
	final int physWidth = rotated ? mBaseDisplayHeight : mBaseDisplayWidth;
	final int physHeight = rotated ? mBaseDisplayWidth : mBaseDisplayHeight;
	int width = mDisplayInfo.logicalWidth;
	int left = (physWidth - width) / 2;
	int height = mDisplayInfo.logicalHeight;
	int top = (physHeight - height) / 2;
	out.set(left, top, left + width, top + height);
	}

	/** Refer to {@link WindowManagerService#attachStack(int, int)} */
	void attachStack(TaskStack stack) {
	if (stack.mStackId == HOME_STACK_ID) {
	if (mHomeStack != null) {
	throw new IllegalArgumentException("attachStack: HOME_STACK_ID (0) not first.");
	}
	mHomeStack = stack;
	}
	mStacks.add(stack);
	layoutNeeded = true;
	}

	void moveStack(TaskStack stack, boolean toTop) {
	mStacks.remove(stack);
	mStacks.add(toTop ? mStacks.size() : 0, stack);
	}

	void detachStack(TaskStack stack) {
	mStacks.remove(stack);
	}

	/**
	* Propagate the new bounds to all child stacks.
	* @param contentRect The bounds to apply at the top level.
	*/
	void resize(Rect contentRect) {
	mContentRect.set(contentRect);
	}

	int stackIdFromPoint(int x, int y) {
	for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
	final TaskStack stack = mStacks.get(stackNdx);
	stack.getBounds(mTmpRect);
	if (mTmpRect.contains(x, y)) {
	return stack.mStackId;
	}
	}
	return -1;
	}

	void setTouchExcludeRegion(TaskStack focusedStack) {
	mTouchExcludeRegion.set(mBaseDisplayRect);
	WindowList windows = getWindowList();
	for (int i = windows.size() - 1; i >= 0; --i) {
	final WindowState win = windows.get(i);
	final TaskStack stack = win.getStack();
	if (win.isVisibleLw() && stack != null && stack != focusedStack) {
	mTmpRect.set(win.mVisibleFrame);
	mTmpRect.intersect(win.mVisibleInsets);
	mTouchExcludeRegion.op(mTmpRect, Region.Op.DIFFERENCE);
	}
	}
	}

	void switchUserStacks(int newUserId) {
	final WindowList windows = getWindowList();
	for (int i = 0; i < windows.size(); i++) {
	final WindowState win = windows.get(i);
	if (win.isHiddenFromUserLocked()) {
	if (DEBUG_VISIBILITY) Slog.w(TAG, "user changing " + newUserId + " hiding "
	+ win + ", attrs=" + win.mAttrs.type + ", belonging to "
	+ win.mOwnerUid);
	win.hideLw(false);
	}
	}

	for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
	mStacks.get(stackNdx).switchUser(newUserId);
	}
	}

	void resetAnimationBackgroundAnimator() {
	for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
	mStacks.get(stackNdx).resetAnimationBackgroundAnimator();
	}
	}

	boolean animateDimLayers() {
	boolean result = false;
	for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
	result \|= mStacks.get(stackNdx).animateDimLayers();
	}
	return result;
	}

	void resetDimming() {
	for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
	mStacks.get(stackNdx).resetDimmingTag();
	}
	}

	boolean isDimming() {
	for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
	if (mStacks.get(stackNdx).isDimming()) {
	return true;
	}
	}
	return false;
	}

	void stopDimmingIfNeeded() {
	for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
	mStacks.get(stackNdx).stopDimmingIfNeeded();
	}
	}

	void close() {
	for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
	mStacks.get(stackNdx).close();
	}
	}

	boolean isAnimating() {
	for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
	final TaskStack stack = mStacks.get(stackNdx);
	if (stack.isAnimating()) {
	return true;
	}
	}
	return false;
	}

	void checkForDeferredActions() {
	boolean animating = false;
	for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
	final TaskStack stack = mStacks.get(stackNdx);
	if (stack.isAnimating()) {
	animating = true;
	} else {
	if (stack.mDeferDetach) {
	mService.detachStackLocked(this, stack);
	}
	final ArrayList<Task> tasks = stack.getTasks();
	for (int taskNdx = tasks.size() - 1; taskNdx >= 0; --taskNdx) {
	final Task task = tasks.get(taskNdx);
	AppTokenList tokens = task.mAppTokens;
	for (int tokenNdx = tokens.size() - 1; tokenNdx >= 0; --tokenNdx) {
	AppWindowToken wtoken = tokens.get(tokenNdx);
	if (wtoken.mDeferRemoval) {
	stack.mExitingAppTokens.remove(wtoken);
	wtoken.mDeferRemoval = false;
	mService.removeAppFromTaskLocked(wtoken);
	}
	}
	if (task.mDeferRemoval) {
	task.mDeferRemoval = false;
	mService.removeTaskLocked(task);
	}
	}
	}
	}
	if (!animating && mDeferredRemoval) {
	mService.onDisplayRemoved(mDisplayId);
	}
	}

	public void dump(String prefix, PrintWriter pw) {
	pw.print(prefix); pw.print("Display: mDisplayId="); pw.println(mDisplayId);
	final String subPrefix = " " + prefix;
	pw.print(subPrefix); pw.print("init="); pw.print(mInitialDisplayWidth); pw.print("x");
	pw.print(mInitialDisplayHeight); pw.print(" "); pw.print(mInitialDisplayDensity);
	pw.print("dpi");
	if (mInitialDisplayWidth != mBaseDisplayWidth
	\|\| mInitialDisplayHeight != mBaseDisplayHeight
	\|\| mInitialDisplayDensity != mBaseDisplayDensity) {
	pw.print(" base=");
	pw.print(mBaseDisplayWidth); pw.print("x"); pw.print(mBaseDisplayHeight);
	pw.print(" "); pw.print(mBaseDisplayDensity); pw.print("dpi");
	}
	pw.print(" cur=");
	pw.print(mDisplayInfo.logicalWidth);
	pw.print("x"); pw.print(mDisplayInfo.logicalHeight);
	pw.print(" app=");
	pw.print(mDisplayInfo.appWidth);
	pw.print("x"); pw.print(mDisplayInfo.appHeight);
	pw.print(" rng="); pw.print(mDisplayInfo.smallestNominalAppWidth);
	pw.print("x"); pw.print(mDisplayInfo.smallestNominalAppHeight);
	pw.print("-"); pw.print(mDisplayInfo.largestNominalAppWidth);
	pw.print("x"); pw.println(mDisplayInfo.largestNominalAppHeight);
	pw.print(subPrefix); pw.print("deferred="); pw.print(mDeferredRemoval);
	pw.print(" layoutNeeded="); pw.println(layoutNeeded);
	for (int stackNdx = mStacks.size() - 1; stackNdx >= 0; --stackNdx) {
	final TaskStack stack = mStacks.get(stackNdx);
	pw.print(prefix); pw.print("mStacks[" + stackNdx + "]"); pw.println(stack.mStackId);
	stack.dump(prefix + " ", pw);
	}
	pw.println();
	pw.println(" Application tokens in bottom up Z order:");
	int ndx = 0;
	final int numStacks = mStacks.size();
	for (int stackNdx = 0; stackNdx < numStacks; ++stackNdx) {
	ArrayList<Task> tasks = mStacks.get(stackNdx).getTasks();
	for (int taskNdx = tasks.size() - 1; taskNdx >= 0; --taskNdx) {
	AppTokenList tokens = tasks.get(taskNdx).mAppTokens;
	for (int tokenNdx = tokens.size() - 1; tokenNdx >= 0; --tokenNdx) {
	final AppWindowToken wtoken = tokens.get(tokenNdx);
	pw.print(" App #"); pw.print(ndx++);
	pw.print(' '); pw.print(wtoken); pw.println(":");
	wtoken.dump(pw, " ");
	}
	}
	}
	if (ndx == 0) {
	pw.println(" None");
	}
	pw.println();
	if (!mExitingTokens.isEmpty()) {
	pw.println();
	pw.println(" Exiting tokens:");
	for (int i=mExitingTokens.size()-1; i>=0; i--) {
	WindowToken token = mExitingTokens.get(i);
	pw.print(" Exiting #"); pw.print(i);
	pw.print(' '); pw.print(token);
	pw.println(':');
	token.dump(pw, " ");
	}
	}
	pw.println();
	}

	@Override
	public String toString() {
	return "Display " + mDisplayId + " info=" + mDisplayInfo + " stacks=" + mStacks;
	}
	}