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/*
This file is part of Subsonic.
Subsonic 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.
Subsonic 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 Subsonic. If not, see <http://www.gnu.org/licenses/>.
Copyright 2009 (C) Sindre Mehus
*/
package net.sourceforge.subsonic.androidapp.util;
import android.content.Context;
import android.widget.ArrayAdapter;
import android.widget.SectionIndexer;
import net.sourceforge.subsonic.androidapp.R;
import net.sourceforge.subsonic.androidapp.domain.Playlist;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
/**
* @author Sindre Mehus
* @version $Id$
*/
public class PlaylistAdapter extends ArrayAdapter<Playlist> implements SectionIndexer {
// Both arrays are indexed by section ID.
private final Object[] sections;
private final Integer[] positions;
/**
* Note: playlists must be sorted alphabetically.
*/
public PlaylistAdapter(Context context, List<Playlist> playlists) {
super(context, R.layout.playlist_list_item, playlists);
Set<String> sectionSet = new LinkedHashSet<String>(30);
List<Integer> positionList = new ArrayList<Integer>(30);
for (int i = 0; i < playlists.size(); i++) {
Playlist playlist = playlists.get(i);
if (playlist.getName().length() > 0) {
String index = playlist.getName().substring(0, 1).toUpperCase();
if (!sectionSet.contains(index)) {
sectionSet.add(index);
positionList.add(i);
}
}
}
sections = sectionSet.toArray(new Object[sectionSet.size()]);
positions = positionList.toArray(new Integer[positionList.size()]);
}
@Override
public Object[] getSections() {
return sections;
}
@Override
public int getPositionForSection(int section) {
section = Math.min(section, positions.length - 1);
return positions[section];
}
@Override
public int getSectionForPosition(int pos) {
for (int i = 0; i < sections.length - 1; i++) {
if (pos < positions[i + 1]) {
return i;
}
}
return sections.length - 1;
}
public static class PlaylistComparator implements Comparator<Playlist> {
@Override
public int compare(Playlist playlist1, Playlist playlist2) {
return playlist1.getName().compareToIgnoreCase(playlist2.getName());
}
public static List<Playlist> sort(List<Playlist> playlists) {
Collections.sort(playlists, new PlaylistComparator());
return playlists;
}
}
}
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