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/*
* Copyright (C) 2020 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.content.Context;
import android.util.AttributeSet;
import com.android.internal.widget.GridLayoutManager;
import com.android.internal.widget.RecyclerView;
/**
* For a11y and per {@link RecyclerView#onInitializeAccessibilityNodeInfo}, override
* methods to ensure proper row counts.
*/
public class ChooserGridLayoutManager extends GridLayoutManager {
private boolean mVerticalScrollEnabled = true;
/**
* Constructor used when layout manager is set in XML by RecyclerView attribute
* "layoutManager". If spanCount is not specified in the XML, it defaults to a
* single column.
*
*/
public ChooserGridLayoutManager(Context context, AttributeSet attrs, int defStyleAttr,
int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
}
/**
* Creates a vertical GridLayoutManager
*
* @param context Current context, will be used to access resources.
* @param spanCount The number of columns in the grid
*/
public ChooserGridLayoutManager(Context context, int spanCount) {
super(context, spanCount);
}
/**
* @param context Current context, will be used to access resources.
* @param spanCount The number of columns or rows in the grid
* @param orientation Layout orientation. Should be {@link #HORIZONTAL} or {@link
* #VERTICAL}.
* @param reverseLayout When set to true, layouts from end to start.
*/
public ChooserGridLayoutManager(Context context, int spanCount, int orientation,
boolean reverseLayout) {
super(context, spanCount, orientation, reverseLayout);
}
@Override
public int getRowCountForAccessibility(RecyclerView.Recycler recycler,
RecyclerView.State state) {
// Do not count the footer view in the official count
return super.getRowCountForAccessibility(recycler, state) - 1;
}
void setVerticalScrollEnabled(boolean verticalScrollEnabled) {
mVerticalScrollEnabled = verticalScrollEnabled;
}
@Override
public boolean canScrollVertically() {
return mVerticalScrollEnabled && super.canScrollVertically();
}
}
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