| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except |
| * in compliance with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software distributed under the License |
| * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express |
| * or implied. See the License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| package android.support.v17.leanback.widget; |
| |
| import static android.support.annotation.RestrictTo.Scope.LIBRARY_GROUP; |
| |
| import android.support.annotation.RestrictTo; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.view.ViewParent; |
| |
| /** |
| * @hide |
| */ |
| @RestrictTo(LIBRARY_GROUP) |
| public class Util { |
| |
| /** |
| * Returns true if child == parent or is descendant of the parent. |
| */ |
| public static boolean isDescendant(ViewGroup parent, View child) { |
| while (child != null) { |
| if (child == parent) { |
| return true; |
| } |
| ViewParent p = child.getParent(); |
| if (!(p instanceof View)) { |
| return false; |
| } |
| child = (View) p; |
| } |
| return false; |
| } |
| } |