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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
17package android.support.v7.preference;
18
19import android.os.Bundle;
20import android.support.v4.view.AccessibilityDelegateCompat;
21import android.support.v4.view.accessibility.AccessibilityNodeInfoCompat;
22import android.support.v7.widget.RecyclerView;
23import android.support.v7.widget.RecyclerViewAccessibilityDelegate;
24import android.view.View;
25import android.view.accessibility.AccessibilityEvent;
26
27/**
28 * The AccessibilityDelegate used by the RecyclerView that displays Views for Preferences.
29 *
30 * @hide
31 */
32public class PreferenceRecyclerViewAccessibilityDelegate
33        extends RecyclerViewAccessibilityDelegate {
34    final RecyclerView mRecyclerView;
35    final AccessibilityDelegateCompat mDefaultItemDelegate = super.getItemDelegate();
36
37    public PreferenceRecyclerViewAccessibilityDelegate(RecyclerView recyclerView) {
38        super(recyclerView);
39        mRecyclerView = recyclerView;
40    }
41
42    @Override
43    public AccessibilityDelegateCompat getItemDelegate() {
44        return mItemDelegate;
45    }
46
47    final AccessibilityDelegateCompat mItemDelegate = new AccessibilityDelegateCompat() {
48        @Override
49        public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info) {
50            mDefaultItemDelegate.onInitializeAccessibilityNodeInfo(host, info);
51            int position = mRecyclerView.getChildAdapterPosition(host);
52
53            RecyclerView.Adapter adapter = mRecyclerView.getAdapter();
54            if (!(adapter instanceof PreferenceGroupAdapter)) {
55                return;
56            }
57
58            PreferenceGroupAdapter preferenceGroupAdapter = (PreferenceGroupAdapter) adapter;
59            Preference preference = preferenceGroupAdapter.getItem(position);
60            if (preference == null) {
61                return;
62            }
63
64            preference.onInitializeAccessibilityNodeInfo(info);
65        }
66
67        @Override
68        public boolean performAccessibilityAction(View host, int action, Bundle args) {
69            // Must forward actions since the default delegate will handle actions.
70            return mDefaultItemDelegate.performAccessibilityAction(host, action, args);
71        }
72    };
73}
74