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package de.danoeh.antennapod.fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.core.view.ViewCompat;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentStatePagerAdapter;
import androidx.viewpager.widget.ViewPager;
import de.danoeh.antennapod.R;
import de.danoeh.antennapod.activity.CastEnabledActivity;
import de.danoeh.antennapod.activity.MainActivity;
import de.danoeh.antennapod.core.feed.FeedItem;
import de.danoeh.antennapod.core.storage.DBReader;
import de.danoeh.antennapod.core.util.Flavors;
import de.danoeh.antennapod.menuhandler.FeedItemMenuHandler;
import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.disposables.Disposable;
import io.reactivex.schedulers.Schedulers;
/**
* Displays information about a list of FeedItems.
*/
public class ItemPagerFragment extends Fragment {
private static final String ARG_FEEDITEMS = "feeditems";
private static final String ARG_FEEDITEM_POS = "feeditem_pos";
/**
* Creates a new instance of an ItemPagerFragment.
*
* @param feeditem The ID of the FeedItem that should be displayed.
* @return The ItemFragment instance
*/
public static ItemPagerFragment newInstance(long feeditem) {
return newInstance(new long[] { feeditem }, 0);
}
/**
* Creates a new instance of an ItemPagerFragment.
*
* @param feeditems The IDs of the FeedItems that belong to the same list
* @param feedItemPos The position of the FeedItem that is currently shown
* @return The ItemFragment instance
*/
public static ItemPagerFragment newInstance(long[] feeditems, int feedItemPos) {
ItemPagerFragment fragment = new ItemPagerFragment();
Bundle args = new Bundle();
args.putLongArray(ARG_FEEDITEMS, feeditems);
args.putInt(ARG_FEEDITEM_POS, feedItemPos);
fragment.setArguments(args);
return fragment;
}
private long[] feedItems;
private int feedItemPos;
private FeedItem item;
private Disposable disposable;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
feedItems = getArguments().getLongArray(ARG_FEEDITEMS);
feedItemPos = getArguments().getInt(ARG_FEEDITEM_POS);
}
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container,
@Nullable Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
View layout = inflater.inflate(R.layout.feeditem_pager_fragment, container, false);
ViewPager pager = layout.findViewById(R.id.pager);
// FragmentStatePagerAdapter documentation:
// > When using FragmentStatePagerAdapter the host ViewPager must have a valid ID set.
// When opening multiple ItemPagerFragments by clicking "item" -> "visit podcast" -> "item" -> etc,
// the ID is no longer unique and FragmentStatePagerAdapter does not display any pages.
int newId = ViewCompat.generateViewId();
pager.setId(newId);
pager.setAdapter(new ItemPagerAdapter());
pager.setCurrentItem(feedItemPos);
loadItem(feedItems[feedItemPos]);
pager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
loadItem(feedItems[position]);
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
return layout;
}
@Override
public void onDestroyView() {
super.onDestroyView();
if (disposable != null) {
disposable.dispose();
}
}
private void loadItem(long itemId) {
if (disposable != null) {
disposable.dispose();
}
disposable = Observable.fromCallable(() -> DBReader.getFeedItem(itemId))
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(result -> {
item = result;
getActivity().invalidateOptionsMenu();
}, Throwable::printStackTrace);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
if (!isAdded() || item == null) {
return;
}
super.onCreateOptionsMenu(menu, inflater);
if (Flavors.FLAVOR == Flavors.PLAY) {
((CastEnabledActivity) getActivity()).requestCastButton(MenuItem.SHOW_AS_ACTION_ALWAYS);
}
inflater.inflate(R.menu.feeditem_options, menu);
FeedItemMenuHandler.MenuInterface popupMenuInterface = (id, visible) -> {
MenuItem item = menu.findItem(id);
if (item != null) {
item.setVisible(visible);
}
};
if (item.hasMedia()) {
FeedItemMenuHandler.onPrepareMenu(popupMenuInterface, item);
} else {
// these are already available via button1 and button2
FeedItemMenuHandler.onPrepareMenu(popupMenuInterface, item,
R.id.mark_read_item, R.id.visit_website_item);
}
}
@Override
public boolean onOptionsItemSelected(MenuItem menuItem) {
switch (menuItem.getItemId()) {
case R.id.open_podcast:
openPodcast();
return true;
default:
return FeedItemMenuHandler.onMenuItemClicked(this, menuItem.getItemId(), item);
}
}
private void openPodcast() {
Fragment fragment = FeedItemlistFragment.newInstance(item.getFeedId());
((MainActivity) getActivity()).loadChildFragment(fragment);
}
private class ItemPagerAdapter extends FragmentStatePagerAdapter {
ItemPagerAdapter() {
super(getFragmentManager(), BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
}
@NonNull
@Override
public Fragment getItem(int position) {
return ItemFragment.newInstance(feedItems[position]);
}
@Override
public int getCount() {
return feedItems.length;
}
}
}
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