content: /*
   * Copyright (C) 2015 Bilibili
   * Copyright (C) 2015 Zhang Rui <bbcallen@gmail.com>
   *
   * 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.alanwang4523.a4ijkplayerdemo.fragments;
  
  import android.app.Activity;
  import android.content.Context;
  import android.os.Bundle;
  import android.util.Log;
  import android.view.LayoutInflater;
  import android.view.View;
  import android.view.ViewGroup;
  import android.widget.AdapterView;
  import android.widget.ArrayAdapter;
  import android.widget.ListView;
  import android.widget.TextView;
  
  import com.alanwang4523.a4ijkplayerdemo.R;
  
  import java.util.Locale;
  
  import androidx.annotation.Nullable;
  import androidx.fragment.app.Fragment;
  import tv.danmaku.ijk.media.player.misc.ITrackInfo;
  
  public class TracksFragment extends Fragment {
      private ListView mTrackListView;
      private TrackAdapter mAdapter;
  
      public static TracksFragment newInstance() {
          TracksFragment f = new TracksFragment();
          return f;
      }
  
      @Nullable
      @Override
      public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
          ViewGroup viewGroup = (ViewGroup) inflater.inflate(R.layout.fragment_track_list, container, false);
          mTrackListView = (ListView) viewGroup.findViewById(R.id.track_list_view);
          return viewGroup;
      }
  
      @Override
      public void onActivityCreated(@Nullable Bundle savedInstanceState) {
          super.onActivityCreated(savedInstanceState);
  
          final Activity activity = getActivity();
  
          mAdapter = new TrackAdapter(activity);
          mTrackListView.setAdapter(mAdapter);
  
          if (activity instanceof ITrackHolder) {
              final ITrackHolder trackHolder = (ITrackHolder) activity;
              mAdapter.setTrackHolder(trackHolder);
  
              int selectedVideoTrack = trackHolder.getSelectedTrack(ITrackInfo.MEDIA_TRACK_TYPE_VIDEO);
              int selectedAudioTrack = trackHolder.getSelectedTrack(ITrackInfo.MEDIA_TRACK_TYPE_AUDIO);
              int selectedSubtitleTrack = trackHolder.getSelectedTrack(ITrackInfo.MEDIA_TRACK_TYPE_TIMEDTEXT);
              if (selectedVideoTrack >= 0)
                  mTrackListView.setItemChecked(selectedVideoTrack, true);
              if (selectedAudioTrack >= 0)
                  mTrackListView.setItemChecked(selectedAudioTrack, true);
              if (selectedSubtitleTrack >= 0)
                  mTrackListView.setItemChecked(selectedSubtitleTrack, true);
  
              mTrackListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                  @Override
                  public void onItemClick(AdapterView<?> parent, View view, final int position, final long id) {
                      TrackItem trackItem = (TrackItem) mTrackListView.getItemAtPosition(position);
                      for (int i = 0; i < mAdapter.getCount(); ++i) {
                          TrackItem compareItem = mAdapter.getItem(i);
                          if (compareItem.mIndex == trackItem.mIndex)
                              continue;
  
                          if (compareItem.mTrackInfo.getTrackType() != trackItem.mTrackInfo.getTrackType())
                              continue;
  
                          if (mTrackListView.isItemChecked(i))
                              mTrackListView.setItemChecked(i, false);
                      }
                      if (mTrackListView.isItemChecked(position)) {
                          trackHolder.selectTrack(trackItem.mIndex);
                      } else {
                          trackHolder.deselectTrack(trackItem.mIndex);
                      }
                  }
              });
          } else {
              Log.e("TracksFragment", "activity is not an instance of ITrackHolder.");
          }
      }
  
      public interface ITrackHolder {
          ITrackInfo[] getTrackInfo();
          int getSelectedTrack(int trackType);
          void selectTrack(int stream);
          void deselectTrack(int stream);
      }
  
      final class TrackItem {
          public int mIndex;
          public ITrackInfo mTrackInfo;
  
          public String mInfoInline;
  
          public TrackItem(int index, ITrackInfo trackInfo) {
              mIndex = index;
              mTrackInfo = trackInfo;
              mInfoInline = String.format(Locale.US, "# %d: %s", mIndex, mTrackInfo.getInfoInline());
          }
  
          public String getInfoInline() {
              return mInfoInline;
          }
      }
  
      final class TrackAdapter extends ArrayAdapter<TrackItem> {
          private ITrackHolder mTrackHolder;
          private ITrackInfo[] mTrackInfos;
  
          public TrackAdapter(Context context) {
              super(context, android.R.layout.simple_list_item_checked);
          }
  
          public void setTrackHolder(ITrackHolder trackHolder) {
              clear();
              mTrackHolder = trackHolder;
              mTrackInfos = mTrackHolder.getTrackInfo();
              if (mTrackInfos != null) {
                  for(ITrackInfo trackInfo: mTrackInfos) {
                      int index = getCount();
                      TrackItem item = new TrackItem(index, trackInfo);
                      add(item);
                  }
              }
          }
  
          @Override
          public long getItemId(int position) {
              return position;
          }
  
          @Override
          public View getView(int position, View convertView, ViewGroup parent) {
              View view = convertView;
              if (view == null) {
                  LayoutInflater inflater = LayoutInflater.from(parent.getContext());
                  view = inflater.inflate(android.R.layout.simple_list_item_checked, parent, false);
              }
  
              ViewHolder viewHolder = (ViewHolder) view.getTag();
              if (viewHolder == null) {
                  viewHolder = new ViewHolder();
                  viewHolder.mNameTextView = (TextView) view.findViewById(android.R.id.text1);
              }
  
              TrackItem item = getItem(position);
              viewHolder.mNameTextView.setText(item.getInfoInline());
  
              return view;
          }
  
          final class ViewHolder {
              public TextView mNameTextView;
          }
      }
  }
  