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      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.testing;
     18 
     19 import com.android.documentsui.DocsSelectionHelper;
     20 import com.android.documentsui.dirlist.DocsStableIdProvider;
     21 import com.android.documentsui.dirlist.DocumentsAdapter;
     22 import com.android.documentsui.dirlist.TestDocumentsAdapter;
     23 import com.android.documentsui.selection.DefaultSelectionHelper;
     24 import com.android.documentsui.selection.DefaultSelectionHelper.SelectionMode;
     25 import com.android.documentsui.selection.SelectionHelper.SelectionPredicate;
     26 
     27 import java.util.Collections;
     28 import java.util.List;
     29 
     30 public class SelectionHelpers {
     31 
     32     public static final SelectionPredicate CAN_SET_ANYTHING = new SelectionPredicate() {
     33         @Override
     34         public boolean canSetStateForId(String id, boolean nextState) {
     35             return true;
     36         }
     37 
     38         @Override
     39         public boolean canSetStateAtPosition(int position, boolean nextState) {
     40             return true;
     41         }
     42     };
     43 
     44     private SelectionHelpers() {}
     45 
     46     public static DocsSelectionHelper createTestInstance() {
     47         return createTestInstance(Collections.emptyList());
     48     }
     49 
     50     public static DocsSelectionHelper createTestInstance(List<String> docs) {
     51         return createTestInstance(docs, DefaultSelectionHelper.MODE_MULTIPLE);
     52     }
     53 
     54     public static DocsSelectionHelper createTestInstance(
     55             List<String> docs, @SelectionMode int mode) {
     56         return createTestInstance(new TestDocumentsAdapter(docs), mode, CAN_SET_ANYTHING);
     57     }
     58 
     59     public static DocsSelectionHelper createTestInstance(
     60             DocumentsAdapter adapter, @SelectionMode int mode, SelectionPredicate canSetState) {
     61         DocsSelectionHelper manager = mode == DefaultSelectionHelper.MODE_SINGLE
     62                 ? DocsSelectionHelper.createSingleSelect()
     63                 : DocsSelectionHelper.createMultiSelect();
     64 
     65         manager.reset(adapter, new DocsStableIdProvider(adapter), canSetState);
     66 
     67         return manager;
     68     }
     69 }
     70