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/*
* Copyright 2018 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.documentsui;
import android.os.Bundle;
import androidx.recyclerview.selection.MutableSelection;
import androidx.recyclerview.selection.Selection;
import androidx.recyclerview.selection.SelectionTracker;
import androidx.recyclerview.widget.RecyclerView.AdapterDataObserver;
import java.util.Set;
/**
* A stub SelectionTracker used by DocsSelectionHelper before a real SelectionTracker has been
* initialized by DirectoryFragment.
* @param <K> Selection key type which extends {@link SelectionTracker}.
*/
public class StubSelectionTracker<K> extends SelectionTracker<K> {
@Override
public void addObserver(SelectionObserver observer) {
}
@Override
public boolean hasSelection() {
return false;
}
@Override
public Selection<K> getSelection() {
return new MutableSelection<K>();
}
@Override
public void copySelection(MutableSelection<K> dest) {
}
@Override
public boolean isSelected(K key) {
return false;
}
@Override
public void restoreSelection(Selection<K> selection) {
}
@Override
public boolean clearSelection() {
return false;
}
@Override
public boolean setItemsSelected(Iterable<K> keys, boolean selected) {
return false;
}
@Override
public boolean select(K key) {
return false;
}
@Override
public boolean deselect(K key) {
return false;
}
@Override
protected AdapterDataObserver getAdapterDataObserver() {
return null;
}
@Override
public void startRange(int position) {
}
@Override
public void extendRange(int position) {
}
@Override
public void endRange() {
}
@Override
public boolean isRangeActive() {
return false;
}
@Override
public void anchorRange(int position) {
}
@Override
public void extendProvisionalRange(int position) {
}
@Override
public void setProvisionalSelection(Set<K> newSelection) {
}
@Override
public void clearProvisionalSelection() {
}
@Override
public void mergeProvisionalSelection() {
}
@Override
public void onSaveInstanceState(Bundle state) {
}
@Override
public void onRestoreInstanceState(Bundle state) {
}
}
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