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 boolean focused; 45 public final Rect boundsInScreen = new Rect(); 46 public List<IBinder> childTokens; 47 public CharSequence title; 48 public int accessibilityIdOfAnchor = View.NO_ID; 49 WindowInfo()50 private WindowInfo() { 51 /* do nothing - hide constructor */ 52 } 53 obtain()54 public static WindowInfo obtain() { 55 WindowInfo window = sPool.acquire(); 56 if (window == null) { 57 window = new WindowInfo(); 58 } 59 return window; 60 } 61 obtain(WindowInfo other)62 public static WindowInfo obtain(WindowInfo other) { 63 WindowInfo window = obtain(); 64 window.type = other.type; 65 window.layer = other.layer; 66 window.token = other.token; 67 window.parentToken = other.parentToken; 68 window.focused = other.focused; 69 window.boundsInScreen.set(other.boundsInScreen); 70 window.title = other.title; 71 window.accessibilityIdOfAnchor = other.accessibilityIdOfAnchor; 72 73 if (other.childTokens != null && !other.childTokens.isEmpty()) { 74 if (window.childTokens == null) { 75 window.childTokens = new ArrayList<IBinder>(other.childTokens); 76 } else { 77 window.childTokens.addAll(other.childTokens); 78 } 79 } 80 81 return window; 82 } 83 recycle()84 public void recycle() { 85 clear(); 86 sPool.release(this); 87 } 88 89 @Override describeContents()90 public int describeContents() { 91 return 0; 92 } 93 94 @Override writeToParcel(Parcel parcel, int flags)95 public void writeToParcel(Parcel parcel, int flags) { 96 parcel.writeInt(type); 97 parcel.writeInt(layer); 98 parcel.writeStrongBinder(token); 99 parcel.writeStrongBinder(parentToken); 100 parcel.writeInt(focused ? 1 : 0); 101 boundsInScreen.writeToParcel(parcel, flags); 102 parcel.writeCharSequence(title); 103 parcel.writeInt(accessibilityIdOfAnchor); 104 105 if (childTokens != null && !childTokens.isEmpty()) { 106 parcel.writeInt(1); 107 parcel.writeBinderList(childTokens); 108 } else { 109 parcel.writeInt(0); 110 } 111 } 112 113 @Override toString()114 public String toString() { 115 StringBuilder builder = new StringBuilder(); 116 builder.append("WindowInfo["); 117 builder.append("title=").append(title); 118 builder.append(", type=").append(type); 119 builder.append(", layer=").append(layer); 120 builder.append(", token=").append(token); 121 builder.append(", bounds=").append(boundsInScreen); 122 builder.append(", parent=").append(parentToken); 123 builder.append(", focused=").append(focused); 124 builder.append(", children=").append(childTokens); 125 builder.append(", accessibility anchor=").append(accessibilityIdOfAnchor); 126 builder.append(']'); 127 return builder.toString(); 128 } 129 initFromParcel(Parcel parcel)130 private void initFromParcel(Parcel parcel) { 131 type = parcel.readInt(); 132 layer = parcel.readInt(); 133 token = parcel.readStrongBinder(); 134 parentToken = parcel.readStrongBinder(); 135 focused = (parcel.readInt() == 1); 136 boundsInScreen.readFromParcel(parcel); 137 title = parcel.readCharSequence(); 138 accessibilityIdOfAnchor = parcel.readInt(); 139 140 final boolean hasChildren = (parcel.readInt() == 1); 141 if (hasChildren) { 142 if (childTokens == null) { 143 childTokens = new ArrayList<IBinder>(); 144 } 145 parcel.readBinderList(childTokens); 146 } 147 } 148 clear()149 private void clear() { 150 type = 0; 151 layer = 0; 152 token = null; 153 parentToken = null; 154 focused = false; 155 boundsInScreen.setEmpty(); 156 if (childTokens != null) { 157 childTokens.clear(); 158 } 159 } 160 161 public static final Parcelable.Creator<WindowInfo> CREATOR = 162 new Creator<WindowInfo>() { 163 @Override 164 public WindowInfo createFromParcel(Parcel parcel) { 165 WindowInfo window = obtain(); 166 window.initFromParcel(parcel); 167 return window; 168 } 169 170 @Override 171 public WindowInfo[] newArray(int size) { 172 return new WindowInfo[size]; 173 } 174 }; 175 } 176