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 17 package com.android.documentsui; 18 19 import androidx.recyclerview.selection.DefaultSelectionTracker; 20 import androidx.recyclerview.selection.SelectionPredicates; 21 import androidx.recyclerview.selection.SelectionTracker.SelectionPredicate; 22 import androidx.recyclerview.selection.StorageStrategy; 23 24 import com.android.documentsui.testing.TestStableIdProvider; 25 26 import java.util.Collections; 27 import java.util.List; 28 29 public class SelectionHelpers { 30 31 public static final SelectionPredicate<String> CAN_SET_ANYTHING = 32 SelectionPredicates.createSelectAnything(); 33 SelectionHelpers()34 private SelectionHelpers() {} 35 createTestInstance()36 public static DocsSelectionHelper createTestInstance() { 37 return createTestInstance(Collections.emptyList()); 38 } 39 createTestInstance(List<String> docs)40 public static DocsSelectionHelper createTestInstance(List<String> docs) { 41 DocsSelectionHelper manager = new DocsSelectionHelper( 42 new DocsSelectionHelper.DelegateFactory()); 43 44 manager.reset(new DefaultSelectionTracker<String>( 45 Integer.toHexString(System.identityHashCode(docs)), 46 new TestStableIdProvider(docs), 47 CAN_SET_ANYTHING, 48 StorageStrategy.createStringStorage())); 49 return manager; 50 } 51 } 52