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1 /*
2  * Copyright (C) 2013 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.documentsui.prefs;
18 
19 import static com.android.documentsui.base.State.MODE_UNKNOWN;
20 
21 import androidx.annotation.IntDef;
22 import android.content.Context;
23 import android.content.SharedPreferences;
24 import android.preference.PreferenceManager;
25 
26 import com.android.documentsui.base.RootInfo;
27 import com.android.documentsui.base.State.ViewMode;
28 
29 import java.lang.annotation.Retention;
30 import java.lang.annotation.RetentionPolicy;
31 
32 /**
33  * Methods for accessing the local preferences.
34  */
35 public class LocalPreferences {
36     private static final String ROOT_VIEW_MODE_PREFIX = "rootViewMode-";
37 
getViewMode(Context context, RootInfo root, @ViewMode int fallback)38     public static @ViewMode int getViewMode(Context context, RootInfo root,
39             @ViewMode int fallback) {
40         return getPrefs(context).getInt(createKey(root), fallback);
41     }
42 
setViewMode(Context context, RootInfo root, @ViewMode int viewMode)43     public static void setViewMode(Context context, RootInfo root, @ViewMode int viewMode) {
44         assert(viewMode != MODE_UNKNOWN);
45         getPrefs(context).edit().putInt(createKey(root), viewMode).apply();
46     }
47 
getPrefs(Context context)48     private static SharedPreferences getPrefs(Context context) {
49         return PreferenceManager.getDefaultSharedPreferences(context);
50     }
51 
createKey(RootInfo root)52     private static String createKey(RootInfo root) {
53         return ROOT_VIEW_MODE_PREFIX + root.authority + root.rootId;
54     }
55 
56     public static final int PERMISSION_ASK = 0;
57     public static final int PERMISSION_ASK_AGAIN = 1;
58     public static final int PERMISSION_NEVER_ASK = -1;
59 
60     @IntDef(flag = true, value = {
61             PERMISSION_ASK,
62             PERMISSION_ASK_AGAIN,
63             PERMISSION_NEVER_ASK,
64     })
65     @Retention(RetentionPolicy.SOURCE)
66     public @interface PermissionStatus {}
67 
shouldBackup(String s)68     public static boolean shouldBackup(String s) {
69         return (s != null) ? s.startsWith(ROOT_VIEW_MODE_PREFIX) : false;
70     }
71 }
72