WindowToken.java revision 3a5c721072c60c7ed9c8a95d0a65d0e3cb4eb9bb 
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
17package com.android.server.wm;
18
19import android.os.IBinder;
20import android.util.Slog;
21
22import java.io.PrintWriter;
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 */
30class 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 removeAllWindows() {
82        for (int winNdx = windows.size() - 1; winNdx >= 0; --winNdx) {
83            WindowState win = windows.get(winNdx);
84            if (WindowManagerService.DEBUG_WINDOW_MOVEMENT) Slog.w(WindowManagerService.TAG,
85                    "removeAllWindows: removing win=" + win);
86            win.mService.removeWindowLocked(win.mSession, win);
87        }
88    }
89
90    void dump(PrintWriter pw, String prefix) {
91        pw.print(prefix); pw.print("windows="); pw.println(windows);
92        pw.print(prefix); pw.print("windowType="); pw.print(windowType);
93                pw.print(" hidden="); pw.print(hidden);
94                pw.print(" hasVisible="); pw.println(hasVisible);
95        if (waitingToShow || waitingToHide || sendingToBottom) {
96            pw.print(prefix); pw.print("waitingToShow="); pw.print(waitingToShow);
97                    pw.print(" waitingToHide="); pw.print(waitingToHide);
98                    pw.print(" sendingToBottom="); pw.print(sendingToBottom);
99        }
100    }
101
102    @Override
103    public String toString() {
104        if (stringName == null) {
105            StringBuilder sb = new StringBuilder();
106            sb.append("WindowToken{");
107            sb.append(Integer.toHexString(System.identityHashCode(this)));
108            sb.append(" "); sb.append(token); sb.append('}');
109            stringName = sb.toString();
110        }
111        return stringName;
112    }
113}