108 lines
3.9 KiB
Java
108 lines
3.9 KiB
Java
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.internal.widget;
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import android.os.Bundle;
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import android.view.View;
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import android.view.View.AccessibilityDelegate;
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import android.view.accessibility.AccessibilityEvent;
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import android.view.accessibility.AccessibilityNodeInfo;
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/**
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* The AccessibilityDelegate used by RecyclerView.
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* <p>
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* This class handles basic accessibility actions and delegates them to LayoutManager.
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*/
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public class RecyclerViewAccessibilityDelegate extends AccessibilityDelegate {
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final RecyclerView mRecyclerView;
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public RecyclerViewAccessibilityDelegate(RecyclerView recyclerView) {
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mRecyclerView = recyclerView;
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}
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boolean shouldIgnore() {
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return mRecyclerView.hasPendingAdapterUpdates();
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}
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@Override
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public boolean performAccessibilityAction(View host, int action, Bundle args) {
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if (super.performAccessibilityAction(host, action, args)) {
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return true;
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}
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if (!shouldIgnore() && mRecyclerView.getLayoutManager() != null) {
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return mRecyclerView.getLayoutManager().performAccessibilityAction(action, args);
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}
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return false;
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}
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@Override
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public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfo info) {
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super.onInitializeAccessibilityNodeInfo(host, info);
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info.setClassName(RecyclerView.class.getName());
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if (!shouldIgnore() && mRecyclerView.getLayoutManager() != null) {
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mRecyclerView.getLayoutManager().onInitializeAccessibilityNodeInfo(info);
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}
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}
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@Override
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public void onInitializeAccessibilityEvent(View host, AccessibilityEvent event) {
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super.onInitializeAccessibilityEvent(host, event);
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event.setClassName(RecyclerView.class.getName());
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if (host instanceof RecyclerView && !shouldIgnore()) {
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RecyclerView rv = (RecyclerView) host;
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if (rv.getLayoutManager() != null) {
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rv.getLayoutManager().onInitializeAccessibilityEvent(event);
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}
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}
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}
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/**
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* Gets the AccessibilityDelegate for an individual item in the RecyclerView.
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* A basic item delegate is provided by default, but you can override this
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* method to provide a custom per-item delegate.
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*/
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public AccessibilityDelegate getItemDelegate() {
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return mItemDelegate;
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}
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final AccessibilityDelegate mItemDelegate = new AccessibilityDelegate() {
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@Override
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public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfo info) {
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super.onInitializeAccessibilityNodeInfo(host, info);
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if (!shouldIgnore() && mRecyclerView.getLayoutManager() != null) {
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mRecyclerView.getLayoutManager()
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.onInitializeAccessibilityNodeInfoForItem(host, info);
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}
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}
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@Override
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public boolean performAccessibilityAction(View host, int action, Bundle args) {
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if (super.performAccessibilityAction(host, action, args)) {
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return true;
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}
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if (!shouldIgnore() && mRecyclerView.getLayoutManager() != null) {
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return mRecyclerView.getLayoutManager()
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.performAccessibilityActionForItem(host, action, args);
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}
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return false;
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}
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};
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}
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