1/*
2 * Copyright (C) 2016 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 android.media.browse;
18
19import android.os.Bundle;
20
21/**
22 * @hide
23 */
24public class MediaBrowserUtils {
25    public static boolean areSameOptions(Bundle options1, Bundle options2) {
26        if (options1 == options2) {
27            return true;
28        } else if (options1 == null) {
29            return options2.getInt(MediaBrowser.EXTRA_PAGE, -1) == -1
30                    && options2.getInt(MediaBrowser.EXTRA_PAGE_SIZE, -1) == -1;
31        } else if (options2 == null) {
32            return options1.getInt(MediaBrowser.EXTRA_PAGE, -1) == -1
33                    && options1.getInt(MediaBrowser.EXTRA_PAGE_SIZE, -1) == -1;
34        } else {
35            return options1.getInt(MediaBrowser.EXTRA_PAGE, -1)
36                    == options2.getInt(MediaBrowser.EXTRA_PAGE, -1)
37                    && options1.getInt(MediaBrowser.EXTRA_PAGE_SIZE, -1)
38                    == options2.getInt(MediaBrowser.EXTRA_PAGE_SIZE, -1);
39        }
40    }
41
42    public static boolean hasDuplicatedItems(Bundle options1, Bundle options2) {
43        int page1 = options1 == null ? -1 : options1.getInt(MediaBrowser.EXTRA_PAGE, -1);
44        int page2 = options2 == null ? -1 : options2.getInt(MediaBrowser.EXTRA_PAGE, -1);
45        int pageSize1 = options1 == null ? -1 : options1.getInt(MediaBrowser.EXTRA_PAGE_SIZE, -1);
46        int pageSize2 = options2 == null ? -1 : options2.getInt(MediaBrowser.EXTRA_PAGE_SIZE, -1);
47
48        int startIndex1, startIndex2, endIndex1, endIndex2;
49        if (page1 == -1 || pageSize1 == -1) {
50            startIndex1 = 0;
51            endIndex1 = Integer.MAX_VALUE;
52        } else {
53            startIndex1 = pageSize1 * page1;
54            endIndex1 = startIndex1 + pageSize1 - 1;
55        }
56
57        if (page2 == -1 || pageSize2 == -1) {
58            startIndex2 = 0;
59            endIndex2 = Integer.MAX_VALUE;
60        } else {
61            startIndex2 = pageSize2 * page2;
62            endIndex2 = startIndex2 + pageSize2 - 1;
63        }
64
65        if (startIndex1 <= startIndex2 && startIndex2 <= endIndex1) {
66            return true;
67        } else if (startIndex1 <= endIndex2 && endIndex2 <= endIndex1) {
68            return true;
69        }
70        return false;
71    }
72}
73