/*
 * Copyright (C) 2019 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.google.android.car.kitchensink;

import android.util.Pair;
import android.view.View;
import android.view.ViewGroup;

import androidx.viewpager.widget.PagerAdapter;

import java.util.ArrayList;
import java.util.List;

public class SimplePagerAdapter extends PagerAdapter {
    private final List<Pair<View, String>> mPages = new ArrayList<>();

    public SimplePagerAdapter(ViewGroup container) {
        for (int i = 0; i < container.getChildCount(); i++) {
            final View child = container.getChildAt(i);
            final Object tag = child.getTag();
            if (!(tag instanceof String)) continue;
            mPages.add(new Pair<>(child, (String) tag));
        }
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        return mPages.get(position).first;
    }

    @Override
    public int getCount() {
        return mPages.size();
    }

    @Override
    public CharSequence getPageTitle(int position) {
        return mPages.get(position).second;
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view == object;
    }
}