2015-05-03 13:48:36 +02:00
|
|
|
/*
|
2019-05-14 14:08:05 +02:00
|
|
|
* Copyright 2018 The Android Open Source Project
|
2015-05-03 13:48:36 +02:00
|
|
|
*
|
|
|
|
* 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.
|
|
|
|
*/
|
|
|
|
|
2019-05-14 14:08:05 +02:00
|
|
|
package androidx.recyclerview.widget;
|
2015-05-03 13:48:36 +02:00
|
|
|
|
|
|
|
import android.os.Bundle;
|
|
|
|
import android.view.View;
|
|
|
|
import android.view.accessibility.AccessibilityEvent;
|
|
|
|
|
2019-05-14 14:08:05 +02:00
|
|
|
import androidx.annotation.NonNull;
|
|
|
|
import androidx.core.view.AccessibilityDelegateCompat;
|
|
|
|
import androidx.core.view.accessibility.AccessibilityNodeInfoCompat;
|
|
|
|
|
2015-05-03 13:48:36 +02:00
|
|
|
/**
|
|
|
|
* The AccessibilityDelegate used by RecyclerView.
|
|
|
|
* <p>
|
|
|
|
* This class handles basic accessibility actions and delegates them to LayoutManager.
|
|
|
|
*/
|
|
|
|
public class RecyclerViewAccessibilityDelegate extends AccessibilityDelegateCompat {
|
|
|
|
final RecyclerView mRecyclerView;
|
2018-07-30 04:07:02 +02:00
|
|
|
final AccessibilityDelegateCompat mItemDelegate;
|
2015-05-03 13:48:36 +02:00
|
|
|
|
|
|
|
|
2019-05-14 14:08:05 +02:00
|
|
|
public RecyclerViewAccessibilityDelegate(@NonNull RecyclerView recyclerView) {
|
2015-05-03 13:48:36 +02:00
|
|
|
mRecyclerView = recyclerView;
|
2018-07-30 04:07:02 +02:00
|
|
|
mItemDelegate = new ItemDelegate(this);
|
2015-05-03 13:48:36 +02:00
|
|
|
}
|
|
|
|
|
2017-03-31 01:58:05 +02:00
|
|
|
boolean shouldIgnore() {
|
2015-05-03 13:48:36 +02:00
|
|
|
return mRecyclerView.hasPendingAdapterUpdates();
|
|
|
|
}
|
|
|
|
|
|
|
|
@Override
|
|
|
|
public boolean performAccessibilityAction(View host, int action, Bundle args) {
|
|
|
|
if (super.performAccessibilityAction(host, action, args)) {
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
if (!shouldIgnore() && mRecyclerView.getLayoutManager() != null) {
|
|
|
|
return mRecyclerView.getLayoutManager().performAccessibilityAction(action, args);
|
|
|
|
}
|
|
|
|
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
@Override
|
|
|
|
public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info) {
|
|
|
|
super.onInitializeAccessibilityNodeInfo(host, info);
|
|
|
|
if (!shouldIgnore() && mRecyclerView.getLayoutManager() != null) {
|
|
|
|
mRecyclerView.getLayoutManager().onInitializeAccessibilityNodeInfo(info);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
@Override
|
|
|
|
public void onInitializeAccessibilityEvent(View host, AccessibilityEvent event) {
|
|
|
|
super.onInitializeAccessibilityEvent(host, event);
|
|
|
|
if (host instanceof RecyclerView && !shouldIgnore()) {
|
|
|
|
RecyclerView rv = (RecyclerView) host;
|
|
|
|
if (rv.getLayoutManager() != null) {
|
|
|
|
rv.getLayoutManager().onInitializeAccessibilityEvent(event);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2017-03-31 01:58:05 +02:00
|
|
|
/**
|
|
|
|
* Gets the AccessibilityDelegate for an individual item in the RecyclerView.
|
|
|
|
* A basic item delegate is provided by default, but you can override this
|
|
|
|
* method to provide a custom per-item delegate.
|
|
|
|
*/
|
2019-05-14 14:08:05 +02:00
|
|
|
@NonNull
|
2017-03-31 01:58:05 +02:00
|
|
|
public AccessibilityDelegateCompat getItemDelegate() {
|
2015-05-03 13:48:36 +02:00
|
|
|
return mItemDelegate;
|
|
|
|
}
|
|
|
|
|
2018-07-30 04:07:02 +02:00
|
|
|
/**
|
|
|
|
* The default implementation of accessibility delegate for the individual items of the
|
|
|
|
* RecyclerView.
|
|
|
|
* <p>
|
|
|
|
* If you are overriding {@code RecyclerViewAccessibilityDelegate#getItemDelegate()} but still
|
|
|
|
* want to keep some default behavior, you can create an instance of this class and delegate to
|
|
|
|
* the parent as necessary.
|
|
|
|
*/
|
|
|
|
public static class ItemDelegate extends AccessibilityDelegateCompat {
|
|
|
|
final RecyclerViewAccessibilityDelegate mRecyclerViewDelegate;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Creates an item delegate for the given {@code RecyclerViewAccessibilityDelegate}.
|
|
|
|
*
|
|
|
|
* @param recyclerViewDelegate The parent RecyclerView's accessibility delegate.
|
|
|
|
*/
|
2019-05-14 14:08:05 +02:00
|
|
|
public ItemDelegate(@NonNull RecyclerViewAccessibilityDelegate recyclerViewDelegate) {
|
2018-07-30 04:07:02 +02:00
|
|
|
mRecyclerViewDelegate = recyclerViewDelegate;
|
|
|
|
}
|
|
|
|
|
2015-05-03 13:48:36 +02:00
|
|
|
@Override
|
|
|
|
public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info) {
|
|
|
|
super.onInitializeAccessibilityNodeInfo(host, info);
|
2018-07-30 04:07:02 +02:00
|
|
|
if (!mRecyclerViewDelegate.shouldIgnore()
|
|
|
|
&& mRecyclerViewDelegate.mRecyclerView.getLayoutManager() != null) {
|
|
|
|
mRecyclerViewDelegate.mRecyclerView.getLayoutManager()
|
|
|
|
.onInitializeAccessibilityNodeInfoForItem(host, info);
|
2015-05-03 13:48:36 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
@Override
|
|
|
|
public boolean performAccessibilityAction(View host, int action, Bundle args) {
|
|
|
|
if (super.performAccessibilityAction(host, action, args)) {
|
|
|
|
return true;
|
|
|
|
}
|
2018-07-30 04:07:02 +02:00
|
|
|
if (!mRecyclerViewDelegate.shouldIgnore()
|
|
|
|
&& mRecyclerViewDelegate.mRecyclerView.getLayoutManager() != null) {
|
|
|
|
return mRecyclerViewDelegate.mRecyclerView.getLayoutManager()
|
|
|
|
.performAccessibilityActionForItem(host, action, args);
|
2015-05-03 13:48:36 +02:00
|
|
|
}
|
|
|
|
return false;
|
|
|
|
}
|
2018-07-30 04:07:02 +02:00
|
|
|
}
|
2015-05-03 13:48:36 +02:00
|
|
|
}
|
2018-07-30 04:07:02 +02:00
|
|
|
|