Home | History | Annotate | Download | only in wm 
      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 import java.util.ArrayList;
     23 
     24 /**
     25  * Container of a set of related windows in the window manager.  Often this
     26  * is an AppWindowToken, which is the handle for an Activity that it uses
     27  * to display windows.  For nested windows, there is a WindowToken created for
     28  * the parent window to manage its children.
     29  */
     30 class WindowToken {
     31     // The window manager!
     32     final WindowManagerService service;
     33 
     34     // The actual token.
     35     final IBinder token;
     36 
     37     // The type of window this token is for, as per WindowManager.LayoutParams.
     38     final int windowType;
     39 
     40     // Set if this token was explicitly added by a client, so should
     41     // not be removed when all windows are removed.
     42     final boolean explicit;
     43 
     44     // For printing.
     45     String stringName;
     46 
     47     // If this is an AppWindowToken, this is non-null.
     48     AppWindowToken appWindowToken;
     49 
     50     // All of the windows associated with this token.
     51     final WindowList windows = new WindowList();
     52 
     53     // Is key dispatching paused for this token?
     54     boolean paused = false;
     55 
     56     // Should this token's windows be hidden?
     57     boolean hidden;
     58 
     59     // Temporary for finding which tokens no longer have visible windows.
     60     boolean hasVisible;
     61 
     62     // Set to true when this token is in a pending transaction where it
     63     // will be shown.
     64     boolean waitingToShow;
     65 
     66     // Set to true when this token is in a pending transaction where it
     67     // will be hidden.
     68     boolean waitingToHide;
     69 
     70     // Set to true when this token is in a pending transaction where its
     71     // windows will be put to the bottom of the list.
     72     boolean sendingToBottom;
     73 
     74     WindowToken(WindowManagerService _service, IBinder _token, int type, boolean _explicit) {
     75         service = _service;
     76         token = _token;
     77         windowType = type;
     78         explicit = _explicit;
     79     }
     80 
     81     void dump(PrintWriter pw, String prefix) {
     82         pw.print(prefix); pw.print("windows="); pw.println(windows);
     83         pw.print(prefix); pw.print("windowType="); pw.print(windowType);
     84                 pw.print(" hidden="); pw.print(hidden);
     85                 pw.print(" hasVisible="); pw.println(hasVisible);
     86         if (waitingToShow || waitingToHide || sendingToBottom) {
     87             pw.print(prefix); pw.print("waitingToShow="); pw.print(waitingToShow);
     88                     pw.print(" waitingToHide="); pw.print(waitingToHide);
     89                     pw.print(" sendingToBottom="); pw.print(sendingToBottom);
     90         }
     91     }
     92 
     93     @Override
     94     public String toString() {
     95         if (stringName == null) {
     96             StringBuilder sb = new StringBuilder();
     97             sb.append("WindowToken{");
     98             sb.append(Integer.toHexString(System.identityHashCode(this)));
     99             sb.append(" "); sb.append(token); sb.append('}');
    100             stringName = sb.toString();
    101         }
    102         return stringName;
    103     }
    104 }