Home | History | Annotate | Download | only in view 
      1 /*
      2  * Copyright (C) 2014 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package android.view;
     18 
     19 import android.graphics.Rect;
     20 import android.os.IBinder;
     21 import android.os.Parcel;
     22 import android.os.Parcelable;
     23 import android.util.Pools;
     24 
     25 import java.util.ArrayList;
     26 import java.util.List;
     27 
     28 /**
     29  * This class represents information about a window from the
     30  * window manager to another part of the system.
     31  *
     32  * @hide
     33  */
     34 public class WindowInfo implements Parcelable {
     35     private static final int MAX_POOL_SIZE = 10;
     36 
     37     private static final Pools.SynchronizedPool<WindowInfo> sPool =
     38             new Pools.SynchronizedPool<WindowInfo>(MAX_POOL_SIZE);
     39 
     40     public int type;
     41     public int layer;
     42     public IBinder token;
     43     public IBinder parentToken;
     44     public IBinder activityToken;
     45     public boolean focused;
     46     public final Rect boundsInScreen = new Rect();
     47     public List<IBinder> childTokens;
     48     public CharSequence title;
     49     public int accessibilityIdOfAnchor = View.NO_ID;
     50     public boolean inPictureInPicture;
     51 
     52     private WindowInfo() {
     53         /* do nothing - hide constructor */
     54     }
     55 
     56     public static WindowInfo obtain() {
     57         WindowInfo window = sPool.acquire();
     58         if (window == null) {
     59             window = new WindowInfo();
     60         }
     61         return window;
     62     }
     63 
     64     public static WindowInfo obtain(WindowInfo other) {
     65         WindowInfo window = obtain();
     66         window.type = other.type;
     67         window.layer = other.layer;
     68         window.token = other.token;
     69         window.parentToken = other.parentToken;
     70         window.activityToken = other.activityToken;
     71         window.focused = other.focused;
     72         window.boundsInScreen.set(other.boundsInScreen);
     73         window.title = other.title;
     74         window.accessibilityIdOfAnchor = other.accessibilityIdOfAnchor;
     75         window.inPictureInPicture = other.inPictureInPicture;
     76 
     77         if (other.childTokens != null && !other.childTokens.isEmpty()) {
     78             if (window.childTokens == null) {
     79                 window.childTokens = new ArrayList<IBinder>(other.childTokens);
     80             } else {
     81                 window.childTokens.addAll(other.childTokens);
     82             }
     83         }
     84 
     85         return window;
     86     }
     87 
     88     public void recycle() {
     89         clear();
     90         sPool.release(this);
     91     }
     92 
     93     @Override
     94     public int describeContents() {
     95         return 0;
     96     }
     97 
     98     @Override
     99     public void writeToParcel(Parcel parcel, int flags) {
    100         parcel.writeInt(type);
    101         parcel.writeInt(layer);
    102         parcel.writeStrongBinder(token);
    103         parcel.writeStrongBinder(parentToken);
    104         parcel.writeStrongBinder(activityToken);
    105         parcel.writeInt(focused ? 1 : 0);
    106         boundsInScreen.writeToParcel(parcel, flags);
    107         parcel.writeCharSequence(title);
    108         parcel.writeInt(accessibilityIdOfAnchor);
    109         parcel.writeInt(inPictureInPicture ? 1 : 0);
    110 
    111         if (childTokens != null && !childTokens.isEmpty()) {
    112             parcel.writeInt(1);
    113             parcel.writeBinderList(childTokens);
    114         } else {
    115             parcel.writeInt(0);
    116         }
    117     }
    118 
    119     @Override
    120     public String toString() {
    121         StringBuilder builder = new StringBuilder();
    122         builder.append("WindowInfo[");
    123         builder.append("title=").append(title);
    124         builder.append(", type=").append(type);
    125         builder.append(", layer=").append(layer);
    126         builder.append(", token=").append(token);
    127         builder.append(", bounds=").append(boundsInScreen);
    128         builder.append(", parent=").append(parentToken);
    129         builder.append(", focused=").append(focused);
    130         builder.append(", children=").append(childTokens);
    131         builder.append(", accessibility anchor=").append(accessibilityIdOfAnchor);
    132         builder.append(']');
    133         return builder.toString();
    134     }
    135 
    136     private void initFromParcel(Parcel parcel) {
    137         type = parcel.readInt();
    138         layer = parcel.readInt();
    139         token = parcel.readStrongBinder();
    140         parentToken = parcel.readStrongBinder();
    141         activityToken = parcel.readStrongBinder();
    142         focused = (parcel.readInt() == 1);
    143         boundsInScreen.readFromParcel(parcel);
    144         title = parcel.readCharSequence();
    145         accessibilityIdOfAnchor = parcel.readInt();
    146         inPictureInPicture = (parcel.readInt() == 1);
    147 
    148         final boolean hasChildren = (parcel.readInt() == 1);
    149         if (hasChildren) {
    150             if (childTokens == null) {
    151                 childTokens = new ArrayList<IBinder>();
    152             }
    153             parcel.readBinderList(childTokens);
    154         }
    155     }
    156 
    157     private void clear() {
    158         type = 0;
    159         layer = 0;
    160         token = null;
    161         parentToken = null;
    162         activityToken = null;
    163         focused = false;
    164         boundsInScreen.setEmpty();
    165         if (childTokens != null) {
    166             childTokens.clear();
    167         }
    168         inPictureInPicture = false;
    169     }
    170 
    171     public static final Parcelable.Creator<WindowInfo> CREATOR =
    172             new Creator<WindowInfo>() {
    173         @Override
    174         public WindowInfo createFromParcel(Parcel parcel) {
    175             WindowInfo window = obtain();
    176             window.initFromParcel(parcel);
    177             return window;
    178         }
    179 
    180         @Override
    181         public WindowInfo[] newArray(int size) {
    182             return new WindowInfo[size];
    183         }
    184     };
    185 }
    186