1 files changed, 78 insertions, 0 deletions
diff --git a/subsonic-android/src/github/daneren2005/subdroid/util/ArtistAdapter.java b/subsonic-android/src/github/daneren2005/subdroid/util/ArtistAdapter.java
new file mode 100644
index 00000000..6973af8c
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+++ b/subsonic-android/src/github/daneren2005/subdroid/util/ArtistAdapter.java
@@ -0,0 +1,78 @@
+/*
+ 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 2010 (C) Sindre Mehus
+ */
+package github.daneren2005.subdroid.util;
+
+import github.daneren2005.subdroid.domain.Artist;
+import github.daneren2005.subdroid.R;
+import android.widget.ArrayAdapter;
+import android.widget.SectionIndexer;
+import android.content.Context;
+
+import java.util.List;
+import java.util.Set;
+import java.util.LinkedHashSet;
+import java.util.ArrayList;
+
+/**
+ * @author Sindre Mehus
+*/
+public class ArtistAdapter extends ArrayAdapter<Artist> implements SectionIndexer {
+
+    // Both arrays are indexed by section ID.
+    private final Object[] sections;
+    private final Integer[] positions;
+
+    public ArtistAdapter(Context context, List<Artist> artists) {
+        super(context, R.layout.artist_list_item, artists);
+
+        Set<String> sectionSet = new LinkedHashSet<String>(30);
+        List<Integer> positionList = new ArrayList<Integer>(30);
+        for (int i = 0; i < artists.size(); i++) {
+            Artist artist = artists.get(i);
+            String index = artist.getIndex();
+            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;
+    }
+}