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 androidx.transition;
18
19import android.os.Build;
20import android.view.ViewGroup;
21
22import androidx.annotation.NonNull;
23
24/**
25 * Compatibility utilities for platform features of {@link ViewGroup}.
26 */
27class ViewGroupUtils {
28
29    /**
30     * Backward-compatible {@link ViewGroup#getOverlay()}.
31     */
32    static ViewGroupOverlayImpl getOverlay(@NonNull ViewGroup group) {
33        if (Build.VERSION.SDK_INT >= 18) {
34            return new ViewGroupOverlayApi18(group);
35        }
36        return ViewGroupOverlayApi14.createFrom(group);
37    }
38
39    /**
40     * Provides access to the hidden ViewGroup#suppressLayout method.
41     */
42    static void suppressLayout(@NonNull ViewGroup group, boolean suppress) {
43        if (Build.VERSION.SDK_INT >= 18) {
44            ViewGroupUtilsApi18.suppressLayout(group, suppress);
45        } else {
46            ViewGroupUtilsApi14.suppressLayout(group, suppress);
47        }
48    }
49
50    private ViewGroupUtils() {
51    }
52}
53