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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 static com.android.server.wm.WindowManagerDebugConfig.DEBUG_WINDOW_MOVEMENT;
     20 import static com.android.server.wm.WindowManagerDebugConfig.TAG_WM;
     21 
     22 import android.os.IBinder;
     23 import android.util.Slog;
     24 
     25 import java.io.PrintWriter;
     26 
     27 /**
     28  * Container of a set of related windows in the window manager.  Often this
     29  * is an AppWindowToken, which is the handle for an Activity that it uses
     30  * to display windows.  For nested windows, there is a WindowToken created for
     31  * the parent window to manage its children.
     32  */
     33 class WindowToken {
     34     // The window manager!
     35     final WindowManagerService service;
     36 
     37     // The actual token.
     38     final IBinder token;
     39 
     40     // The type of window this token is for, as per WindowManager.LayoutParams.
     41     final int windowType;
     42 
     43     // Set if this token was explicitly added by a client, so should
     44     // not be removed when all windows are removed.
     45     final boolean explicit;
     46 
     47     // For printing.
     48     String stringName;
     49 
     50     // If this is an AppWindowToken, this is non-null.
     51     AppWindowToken appWindowToken;
     52 
     53     // All of the windows associated with this token.
     54     final WindowList windows = new WindowList();
     55 
     56     // Is key dispatching paused for this token?
     57     boolean paused = false;
     58 
     59     // Should this token's windows be hidden?
     60     boolean hidden;
     61 
     62     // Temporary for finding which tokens no longer have visible windows.
     63     boolean hasVisible;
     64 
     65     // Set to true when this token is in a pending transaction where it
     66     // will be shown.
     67     boolean waitingToShow;
     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 removeAllWindows() {
     81         for (int winNdx = windows.size() - 1; winNdx >= 0; --winNdx) {
     82             WindowState win = windows.get(winNdx);
     83             if (DEBUG_WINDOW_MOVEMENT) Slog.w(TAG_WM, "removeAllWindows: removing win=" + win);
     84             win.mService.removeWindowLocked(win);
     85         }
     86         windows.clear();
     87     }
     88 
     89     void dump(PrintWriter pw, String prefix) {
     90         pw.print(prefix); pw.print("windows="); pw.println(windows);
     91         pw.print(prefix); pw.print("windowType="); pw.print(windowType);
     92                 pw.print(" hidden="); pw.print(hidden);
     93                 pw.print(" hasVisible="); pw.println(hasVisible);
     94         if (waitingToShow || sendingToBottom) {
     95             pw.print(prefix); pw.print("waitingToShow="); pw.print(waitingToShow);
     96                     pw.print(" sendingToBottom="); pw.print(sendingToBottom);
     97         }
     98     }
     99 
    100     @Override
    101     public String toString() {
    102         if (stringName == null) {
    103             StringBuilder sb = new StringBuilder();
    104             sb.append("WindowToken{");
    105             sb.append(Integer.toHexString(System.identityHashCode(this)));
    106             sb.append(" "); sb.append(token); sb.append('}');
    107             stringName = sb.toString();
    108         }
    109         return stringName;
    110     }
    111 }
    112