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/*
* 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 android.os.RemoteCallbackList;
import android.view.Display;
import android.view.DisplayInfo;
import android.view.IDisplayContentChangeListener;
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 WindowList mWindows = new WindowList();
// Specification for magnifying the display content.
MagnificationSpec mMagnificationSpec;
// Callback for observing content changes on a display.
RemoteCallbackList<IDisplayContentChangeListener> mDisplayContentChangeListeners;
// 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;
// Accessed directly by all users.
boolean layoutNeeded;
int pendingLayoutChanges;
final boolean isDefaultDisplay;
/**
* @param display May not be null.
*/
DisplayContent(Display display) {
mDisplay = display;
mDisplayId = display.getDisplayId();
display.getDisplayInfo(mDisplayInfo);
isDefaultDisplay = mDisplayId == Display.DEFAULT_DISPLAY;
}
int getDisplayId() {
return mDisplayId;
}
WindowList getWindowList() {
return mWindows;
}
Display getDisplay() {
return mDisplay;
}
DisplayInfo getDisplayInfo() {
return mDisplayInfo;
}
public void updateDisplayInfo() {
mDisplay.getDisplayInfo(mDisplayInfo);
}
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("layoutNeeded="); pw.print(layoutNeeded);
if (mMagnificationSpec != null) {
pw.print(" mMagnificationSpec="); pw.print(mMagnificationSpec);
}
pw.println();
}
}
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