content: /*
   * Copyright (C) 2011-2012 Dominik Schürmann <dominik@dominikschuermann.de>
   *
   * This file is part of AdAway.
   *
   * AdAway is free software: you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation, either version 3 of the License, or
   * (at your option) any later version.
   *
   * AdAway is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with AdAway.  If not, see <http://www.gnu.org/licenses/>.
   *
   */
  
  package org.adaway.ui.help;
  
  import android.os.Bundle;
  
  import androidx.annotation.NonNull;
  import androidx.annotation.StringRes;
  import androidx.appcompat.app.ActionBar;
  import androidx.appcompat.app.AppCompatActivity;
  import androidx.fragment.app.Fragment;
  import androidx.fragment.app.FragmentActivity;
  import androidx.viewpager2.adapter.FragmentStateAdapter;
  import androidx.viewpager2.widget.ViewPager2;
  
  import com.google.android.material.tabs.TabLayout;
  import com.google.android.material.tabs.TabLayoutMediator;
  
  import org.adaway.R;
  import org.adaway.helper.ThemeHelper;
  
  public class HelpActivity extends AppCompatActivity {
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          ThemeHelper.applyTheme(this);
          setContentView(R.layout.help_activity);
  
          ActionBar actionBar = getSupportActionBar();
          if (actionBar != null) {
              actionBar.setDisplayShowTitleEnabled(true);
              actionBar.setDisplayHomeAsUpEnabled(true);
          }
  
          ViewPager2 viewPager = findViewById(R.id.pager);
          viewPager.setAdapter(new TabsAdapter(this));
  
          TabLayout tabLayout = findViewById(R.id.tabLayout);
  
          new TabLayoutMediator(
                  tabLayout,
                  viewPager,
                  (tab, position) -> tab.setText(getTabName(position))
          ).attach();
      }
  
      private @StringRes
      int getTabName(int position) {
          switch (position) {
              case 0:
                  return R.string.help_tab_faq;
              case 1:
                  return R.string.help_tab_problems;
              case 2:
                  return R.string.help_tab_s_on_s_off;
              default:
                  throw new IllegalStateException("Position " + position + " is not supported.");
          }
      }
  
      private static class TabsAdapter extends FragmentStateAdapter {
          private final Fragment faqFragment = HelpFragmentHtml.newInstance(R.raw.help_faq);
          private final Fragment problemsFragment = HelpFragmentHtml.newInstance(R.raw.help_problems);
          private final Fragment sonSofFragment = HelpFragmentHtml.newInstance(R.raw.help_s_on_s_off);
  
          TabsAdapter(@NonNull FragmentActivity fragmentActivity) {
              super(fragmentActivity);
          }
  
          @NonNull
          @Override
          public Fragment createFragment(int position) {
              switch (position) {
                  case 0:
                      return this.faqFragment;
                  case 1:
                      return this.problemsFragment;
                  case 2:
                      return this.sonSofFragment;
                  default:
                      throw new IllegalStateException("Position " + position + " is not supported.");
              }
          }
  
          @Override
          public int getItemCount() {
              return 3;
          }
      }
  }
  