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 import android.view.accessibility.AccessibilityNodeInfo;
     25 
     26 import java.util.ArrayList;
     27 import java.util.List;
     28 
     29 /**
     30  * This class represents information about a window from the
     31  * window manager to another part of the system.
     32  *
     33  * @hide
     34  */
     35 public class WindowInfo implements Parcelable {
     36     private static final int MAX_POOL_SIZE = 10;
     37 
     38     private static final Pools.SynchronizedPool<WindowInfo> sPool =
     39             new Pools.SynchronizedPool<WindowInfo>(MAX_POOL_SIZE);
     40 
     41     public int type;
     42     public int layer;
     43     public IBinder token;
     44     public IBinder parentToken;
     45     public IBinder activityToken;
     46     public boolean focused;
     47     public final Rect boundsInScreen = new Rect();
     48     public List<IBinder> childTokens;
     49     public CharSequence title;
     50     public long accessibilityIdOfAnchor = AccessibilityNodeInfo.UNDEFINED_NODE_ID;
     51     public boolean inPictureInPicture;
     52 
     53     private WindowInfo() {
     54         /* do nothing - hide constructor */
     55     }
     56 
     57     public static WindowInfo obtain() {
     58         WindowInfo window = sPool.acquire();
     59         if (window == null) {
     60             window = new WindowInfo();
     61         }
     62         return window;
     63     }
     64 
     65     public static WindowInfo obtain(WindowInfo other) {
     66         WindowInfo window = obtain();
     67         window.type = other.type;
     68         window.layer = other.layer;
     69         window.token = other.token;
     70         window.parentToken = other.parentToken;
     71         window.activityToken = other.activityToken;
     72         window.focused = other.focused;
     73         window.boundsInScreen.set(other.boundsInScreen);
     74         window.title = other.title;
     75         window.accessibilityIdOfAnchor = other.accessibilityIdOfAnchor;
     76         window.inPictureInPicture = other.inPictureInPicture;
     77 
     78         if (other.childTokens != null && !other.childTokens.isEmpty()) {
     79             if (window.childTokens == null) {
     80                 window.childTokens = new ArrayList<IBinder>(other.childTokens);
     81             } else {
     82                 window.childTokens.addAll(other.childTokens);
     83             }
     84         }
     85 
     86         return window;
     87     }
     88 
     89     public void recycle() {
     90         clear();
     91         sPool.release(this);
     92     }
     93 
     94     @Override
     95     public int describeContents() {
     96         return 0;
     97     }
     98 
     99     @Override
    100     public void writeToParcel(Parcel parcel, int flags) {
    101         parcel.writeInt(type);
    102         parcel.writeInt(layer);
    103         parcel.writeStrongBinder(token);
    104         parcel.writeStrongBinder(parentToken);
    105         parcel.writeStrongBinder(activityToken);
    106         parcel.writeInt(focused ? 1 : 0);
    107         boundsInScreen.writeToParcel(parcel, flags);
    108         parcel.writeCharSequence(title);
    109         parcel.writeLong(accessibilityIdOfAnchor);
    110         parcel.writeInt(inPictureInPicture ? 1 : 0);
    111 
    112         if (childTokens != null && !childTokens.isEmpty()) {
    113             parcel.writeInt(1);
    114             parcel.writeBinderList(childTokens);
    115         } else {
    116             parcel.writeInt(0);
    117         }
    118     }
    119 
    120     @Override
    121     public String toString() {
    122         StringBuilder builder = new StringBuilder();
    123         builder.append("WindowInfo[");
    124         builder.append("title=").append(title);
    125         builder.append(", type=").append(type);
    126         builder.append(", layer=").append(layer);
    127         builder.append(", token=").append(token);
    128         builder.append(", bounds=").append(boundsInScreen);
    129         builder.append(", parent=").append(parentToken);
    130         builder.append(", focused=").append(focused);
    131         builder.append(", children=").append(childTokens);
    132         builder.append(", accessibility anchor=").append(accessibilityIdOfAnchor);
    133         builder.append(']');
    134         return builder.toString();
    135     }
    136 
    137     private void initFromParcel(Parcel parcel) {
    138         type = parcel.readInt();
    139         layer = parcel.readInt();
    140         token = parcel.readStrongBinder();
    141         parentToken = parcel.readStrongBinder();
    142         activityToken = parcel.readStrongBinder();
    143         focused = (parcel.readInt() == 1);
    144         boundsInScreen.readFromParcel(parcel);
    145         title = parcel.readCharSequence();
    146         accessibilityIdOfAnchor = parcel.readLong();
    147         inPictureInPicture = (parcel.readInt() == 1);
    148 
    149         final boolean hasChildren = (parcel.readInt() == 1);
    150         if (hasChildren) {
    151             if (childTokens == null) {
    152                 childTokens = new ArrayList<IBinder>();
    153             }
    154             parcel.readBinderList(childTokens);
    155         }
    156     }
    157 
    158     private void clear() {
    159         type = 0;
    160         layer = 0;
    161         token = null;
    162         parentToken = null;
    163         activityToken = null;
    164         focused = false;
    165         boundsInScreen.setEmpty();
    166         if (childTokens != null) {
    167             childTokens.clear();
    168         }
    169         inPictureInPicture = false;
    170     }
    171 
    172     public static final Parcelable.Creator<WindowInfo> CREATOR =
    173             new Creator<WindowInfo>() {
    174         @Override
    175         public WindowInfo createFromParcel(Parcel parcel) {
    176             WindowInfo window = obtain();
    177             window.initFromParcel(parcel);
    178             return window;
    179         }
    180 
    181         @Override
    182         public WindowInfo[] newArray(int size) {
    183             return new WindowInfo[size];
    184         }
    185     };
    186 }
    187