1 /*
2  * Copyright (C) 2021 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.compatibility.common.util;
18 
19 import android.app.Activity;
20 import android.view.Window;
21 
22 public class WindowUtil {
23     /**
24      * The timeout in milliseconds to wait for window focus in
25      * {@link #waitForFocus(Window)} and {@link #waitForFocus(Activity)}.
26      */
27     public static final long WINDOW_FOCUS_TIMEOUT_MILLIS = 10_000L;
28 
29     /**
30      * Waits until {@code activity}'s main window has focus, timing out after
31      * {@link #WINDOW_FOCUS_TIMEOUT_MILLIS}.
32      * @param activity The Activity whose main window should gain focus.
33      */
waitForFocus(Activity activity)34     public static void waitForFocus(Activity activity) {
35         PollingCheck.waitFor(WINDOW_FOCUS_TIMEOUT_MILLIS,
36                 activity::hasWindowFocus);
37     }
38 
39     /**
40      * Waits until {@code window} has focus, timing out after {@link #WINDOW_FOCUS_TIMEOUT_MILLIS}.
41      * @param window The Window that should gain focus.
42      */
waitForFocus(Window window)43     public static void waitForFocus(Window window) {
44         PollingCheck.waitFor(WINDOW_FOCUS_TIMEOUT_MILLIS,
45                 window.getDecorView()::hasWindowFocus);
46     }
47 }
48