1 /*
2  * Copyright (C) 2019 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.settings.wifi.slice;
18 
19 import android.content.Context;
20 import android.net.Uri;
21 import android.os.SystemClock;
22 
23 import com.android.settings.slices.SliceBackgroundWorker;
24 
25 /**
26  * {@link SliceBackgroundWorker} for Wi-Fi, used by {@link ContextualWifiSlice}.
27  */
28 public class ContextualWifiScanWorker extends WifiScanWorker {
29 
30     private static long sVisibleUiSessionToken;
31     private static long sActiveSession;
32 
ContextualWifiScanWorker(Context context, Uri uri)33     public ContextualWifiScanWorker(Context context, Uri uri) {
34         super(context, uri);
35     }
36 
37     /**
38      * Starts a new visible UI session for the purpose of automatically starting captive portal.
39      *
40      * A visible UI session is defined as a duration of time when a UI screen is visible to user.
41      * Going to a sub-page and coming out breaks the continuation, leaving the page and coming back
42      * breaks it too.
43      */
newVisibleUiSession()44     public static void newVisibleUiSession() {
45         sVisibleUiSessionToken = SystemClock.elapsedRealtime();
46     }
47 
saveSession()48     static void saveSession() {
49         sActiveSession = sVisibleUiSessionToken;
50     }
51 
52     @Override
clearClickedWifiOnSliceUnpinned()53     protected void clearClickedWifiOnSliceUnpinned() {
54         // Do nothing for contextual Wi-Fi slice
55     }
56 
57     @Override
isSessionValid()58     protected boolean isSessionValid() {
59         if (sVisibleUiSessionToken != sActiveSession) {
60             clearClickedWifi();
61             return false;
62         }
63         return true;
64     }
65 
66     @Override
getApRowCount()67     protected int getApRowCount() {
68         return ContextualWifiSlice.getApRowCount();
69     }
70 }