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
17package com.android.documentsui.prefs;
18
19import static com.android.documentsui.base.State.MODE_UNKNOWN;
20
21import android.annotation.IntDef;
22import android.content.Context;
23import android.content.SharedPreferences;
24import android.preference.PreferenceManager;
25
26import com.android.documentsui.base.RootInfo;
27import com.android.documentsui.base.State.ViewMode;
28
29import java.lang.annotation.Retention;
30import java.lang.annotation.RetentionPolicy;
31
32/**
33 * Methods for accessing the local preferences.
34 */
35public class LocalPreferences {
36    private static final String ROOT_VIEW_MODE_PREFIX = "rootViewMode-";
37
38    public static @ViewMode int getViewMode(Context context, RootInfo root,
39            @ViewMode int fallback) {
40        return getPrefs(context).getInt(createKey(root), fallback);
41    }
42
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
48    private static SharedPreferences getPrefs(Context context) {
49        return PreferenceManager.getDefaultSharedPreferences(context);
50    }
51
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
68    public static boolean shouldBackup(String s) {
69        return (s != null) ? s.startsWith(ROOT_VIEW_MODE_PREFIX) : false;
70    }
71}
72