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      1 /*
      2  * Copyright (C) 2011 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 com.android.server.wm;
     18 
     19 import android.os.IBinder;
     20 
     21 import java.io.PrintWriter;
     22 
     23 /**
     24  * Container of a set of related windows in the window manager.  Often this
     25  * is an AppWindowToken, which is the handle for an Activity that it uses
     26  * to display windows.  For nested windows, there is a WindowToken created for
     27  * the parent window to manage its children.
     28  */
     29 class WindowToken {
     30     // The window manager!
     31     final WindowManagerService service;
     32 
     33     // The actual token.
     34     final IBinder token;
     35 
     36     // The type of window this token is for, as per WindowManager.LayoutParams.
     37     final int windowType;
     38 
     39     // Set if this token was explicitly added by a client, so should
     40     // not be removed when all windows are removed.
     41     final boolean explicit;
     42 
     43     // For printing.
     44     String stringName;
     45 
     46     // If this is an AppWindowToken, this is non-null.
     47     AppWindowToken appWindowToken;
     48 
     49     // All of the windows associated with this token.
     50     final WindowList windows = new WindowList();
     51 
     52     // Is key dispatching paused for this token?
     53     boolean paused = false;
     54 
     55     // Should this token's windows be hidden?
     56     boolean hidden;
     57 
     58     // Temporary for finding which tokens no longer have visible windows.
     59     boolean hasVisible;
     60 
     61     // Set to true when this token is in a pending transaction where it
     62     // will be shown.
     63     boolean waitingToShow;
     64 
     65     // Set to true when this token is in a pending transaction where it
     66     // will be hidden.
     67     boolean waitingToHide;
     68 
     69     // Set to true when this token is in a pending transaction where its
     70     // windows will be put to the bottom of the list.
     71     boolean sendingToBottom;
     72 
     73     WindowToken(WindowManagerService _service, IBinder _token, int type, boolean _explicit) {
     74         service = _service;
     75         token = _token;
     76         windowType = type;
     77         explicit = _explicit;
     78     }
     79 
     80     void dump(PrintWriter pw, String prefix) {
     81         pw.print(prefix); pw.print("windows="); pw.println(windows);
     82         pw.print(prefix); pw.print("windowType="); pw.print(windowType);
     83                 pw.print(" hidden="); pw.print(hidden);
     84                 pw.print(" hasVisible="); pw.println(hasVisible);
     85         if (waitingToShow || waitingToHide || sendingToBottom) {
     86             pw.print(prefix); pw.print("waitingToShow="); pw.print(waitingToShow);
     87                     pw.print(" waitingToHide="); pw.print(waitingToHide);
     88                     pw.print(" sendingToBottom="); pw.print(sendingToBottom);
     89         }
     90     }
     91 
     92     @Override
     93     public String toString() {
     94         if (stringName == null) {
     95             StringBuilder sb = new StringBuilder();
     96             sb.append("WindowToken{");
     97             sb.append(Integer.toHexString(System.identityHashCode(this)));
     98             sb.append(" "); sb.append(token); sb.append('}');
     99             stringName = sb.toString();
    100         }
    101         return stringName;
    102     }
    103 }