1 /*
2  * Copyright (C) 2015 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 package com.android.launcher3.allapps;
17 
18 import android.content.Context;
19 import android.os.Process;
20 import android.os.UserHandle;
21 
22 import com.android.launcher3.model.data.AppInfo;
23 import com.android.launcher3.pm.UserCache;
24 import com.android.launcher3.util.LabelComparator;
25 
26 import java.util.Comparator;
27 
28 /**
29  * A comparator to arrange items based on user profiles.
30  */
31 public class AppInfoComparator implements Comparator<AppInfo> {
32 
33     private final UserCache mUserManager;
34     private final UserHandle mMyUser;
35     private final LabelComparator mLabelComparator;
36 
AppInfoComparator(Context context)37     public AppInfoComparator(Context context) {
38         mUserManager = UserCache.INSTANCE.get(context);
39         mMyUser = Process.myUserHandle();
40         mLabelComparator = new LabelComparator();
41     }
42 
43     @Override
compare(AppInfo a, AppInfo b)44     public int compare(AppInfo a, AppInfo b) {
45         // Order by the title in the current locale
46         int result = mLabelComparator.compare(a.title.toString(), b.title.toString());
47         if (result != 0) {
48             return result;
49         }
50 
51         // If labels are same, compare component names
52         result = a.componentName.compareTo(b.componentName);
53         if (result != 0) {
54             return result;
55         }
56 
57         if (mMyUser.equals(a.user)) {
58             return -1;
59         } else {
60             Long aUserSerial = mUserManager.getSerialNumberForUser(a.user);
61             Long bUserSerial = mUserManager.getSerialNumberForUser(b.user);
62             return aUserSerial.compareTo(bUserSerial);
63         }
64     }
65 }
66