Merge "Fix a11y navigation in Chooser" into tm-dev am: 247cb3a3

        final LayoutInflater inflater = LayoutInflater.from(getContext());

        final ViewGroup rootView =

                (ViewGroup) inflater.inflate(R.layout.chooser_list_per_profile, null, false);

        return new ChooserProfileDescriptor(rootView, adapter);

        ChooserProfileDescriptor profileDescriptor =

                new ChooserProfileDescriptor(rootView, adapter);

        profileDescriptor.recyclerView.setAccessibilityDelegateCompat(

                new ChooserRecyclerViewAccessibilityDelegate(profileDescriptor.recyclerView));

        return profileDescriptor;

    }

    RecyclerView getListViewForIndex(int index) {

/*

 * Copyright (C) 2022 The Android Open Source Project

 *

 * 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.

 */

package com.android.internal.app;

import android.annotation.NonNull;

import android.graphics.Rect;

import android.view.View;

import android.view.ViewGroup;

import android.view.accessibility.AccessibilityEvent;

import com.android.internal.widget.RecyclerView;

import com.android.internal.widget.RecyclerViewAccessibilityDelegate;

class ChooserRecyclerViewAccessibilityDelegate extends RecyclerViewAccessibilityDelegate {

    private final Rect mTempRect = new Rect();

    private final int[] mConsumed = new int[2];

    ChooserRecyclerViewAccessibilityDelegate(RecyclerView recyclerView) {

        super(recyclerView);

    }

    @Override

    public boolean onRequestSendAccessibilityEvent(

            @NonNull ViewGroup host,

            @NonNull View view,

            @NonNull AccessibilityEvent event) {

        boolean result = super.onRequestSendAccessibilityEvent(host, view, event);

        if (result && event.getEventType() == AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED) {

            ensureViewOnScreenVisibility((RecyclerView) host, view);

        }

        return result;

    }

    /**

     * Bring the view that received accessibility focus on the screen.

     * The method's logic is based on a model where RecyclerView is a child of another scrollable

     * component (ResolverDrawerLayout) and can be partially scrolled off the screen. In that case,

     * RecyclerView's children that are positioned fully within RecyclerView bounds but scrolled

     * out of the screen by the outer component, when selected by the accessibility navigation will

     * remain off the screen (as neither components detect such specific case).

     * If the view that receiving accessibility focus is scrolled of the screen, perform the nested

     * scrolling to make in visible.

     */

    private void ensureViewOnScreenVisibility(RecyclerView recyclerView, View view) {

        View child = recyclerView.findContainingItemView(view);

        if (child == null) {

            return;

        }

        recyclerView.getBoundsOnScreen(mTempRect, true);

        int recyclerOnScreenTop = mTempRect.top;

        int recyclerOnScreenBottom = mTempRect.bottom;

        child.getBoundsOnScreen(mTempRect);

        int dy = 0;

        // if needed, do the page-length scroll instead of just a row-length scroll as

        // ResolverDrawerLayout snaps to the compact view and the row-length scroll can be snapped

        // back right away.

        if (mTempRect.top < recyclerOnScreenTop) {

            // snap to the bottom

            dy = mTempRect.bottom - recyclerOnScreenBottom;

        } else if (mTempRect.bottom > recyclerOnScreenBottom) {

            // snap to the top

            dy = mTempRect.top - recyclerOnScreenTop;

        }

        nestedVerticalScrollBy(recyclerView, dy);

    }

    private void nestedVerticalScrollBy(RecyclerView recyclerView, int dy) {

        if (dy == 0) {

            return;

        }

        recyclerView.startNestedScroll(View.SCROLL_AXIS_VERTICAL);

        if (recyclerView.dispatchNestedPreScroll(0, dy, mConsumed, null)) {

            dy -= mConsumed[1];

        }

        recyclerView.scrollBy(0, dy);

        recyclerView.stopNestedScroll();

    }

}