Change how unfilled songs are handled

* Remove code checks for -1 and path == null, it's the job of the
creator of a Song object to not inject unfilled songs into the timeline

src/ch/blinkenlights/android/vanilla/AudioPickerActivity.java

@@ -51,7 +51,7 @@ public class AudioPickerActivity extends PlaybackActivity {
 		}
 
 		mSong = getSongForUri(uri);
-		if (mSong.isEmpty()) {
+		if (mSong == null) {
 			// unsupported intent or song not found
 			finish();
 			return;
@@ -113,7 +113,7 @@ public class AudioPickerActivity extends PlaybackActivity {
 	 * Attempts to resolve given uri to a song object
 	 *
 	 * @param uri The uri to resolve
-	 * @return A song object, id will be -1 on failure
+	 * @return A song object, null on failure
 	 */
 	private Song getSongForUri(Uri uri) {
 		Song song = new Song(-1);
@@ -130,7 +130,7 @@ public class AudioPickerActivity extends PlaybackActivity {
 			}
 			cursor.close();
 		}
-		return song;
+		return song.isFilled() ? song : null;
 	}
 
 }

src/ch/blinkenlights/android/vanilla/FullPlaybackActivity.java

@@ -594,10 +594,8 @@ public class FullPlaybackActivity extends PlaybackActivity
 			}
 			mFormat = sb.toString();
 
-			if(song.path != null) { /* ICS bug? */
 			float[] rg = PlaybackService.get(this).getReplayGainValues(song.path);
 			mReplayGain = "track="+rg[0]+"dB, album="+rg[1]+"dB";
-			}
 
 			data.release();
 		}

src/ch/blinkenlights/android/vanilla/MediaUtils.java

@@ -412,7 +412,7 @@ public class MediaUtils {
 			}
 			cursor.close();
 		}
-		return song.isEmpty() ? null : song;
+		return song.isFilled() ? song : null;
 	}
 
 	/**

src/ch/blinkenlights/android/vanilla/PlaybackService.java

@@ -738,7 +738,6 @@ public final class PlaybackService extends Service
 		Song nextSong = getSong(1);
 
 		if( nextSong != null
-		 && nextSong.path != null
 		 && fa != SongTimeline.FINISH_REPEAT_CURRENT
 		 && fa != SongTimeline.FINISH_STOP_CURRENT
 		 && !mTimeline.isEndOfQueue() ) {
@@ -1279,7 +1278,7 @@ public final class PlaybackService extends Service
 		else
 			song = mTimeline.shiftCurrentSong(delta);
 		mCurrentSong = song;
-		if (song == null || song.isEmpty()) {
+		if (song == null) {
 			if (MediaUtils.isSongAvailable(getContentResolver())) {
 				int flag = finishAction(mState) == SongTimeline.FINISH_RANDOM ? FLAG_ERROR : FLAG_EMPTY_QUEUE;
 				synchronized (mStateLock) {
@@ -1325,7 +1324,7 @@ public final class PlaybackService extends Service
 				mPreparedMediaPlayer = tmpPlayer; // this was mMediaPlayer and is in reset() state
 				Log.v("VanillaMusic", "Swapped media players");
 			}
-			else if(song.path != null) {
+			else {
 				prepareMediaPlayer(mMediaPlayer, song.path);
 			}
 

src/ch/blinkenlights/android/vanilla/RemoteControl.java

@@ -87,7 +87,7 @@ public class RemoteControl {
 
 		remote.setPlaybackState(isPlaying ? RemoteControlClient.PLAYSTATE_PLAYING : RemoteControlClient.PLAYSTATE_PAUSED);
 		RemoteControlClient.MetadataEditor editor = remote.editMetadata(true);
-		if (song != null && song.isEmpty() == false) {
+		if (song != null) {
 			editor.putString(MediaMetadataRetriever.METADATA_KEY_ARTIST, song.artist);
 			editor.putString(MediaMetadataRetriever.METADATA_KEY_ALBUM, song.album);
 			editor.putString(MediaMetadataRetriever.METADATA_KEY_TITLE, song.title);

src/ch/blinkenlights/android/vanilla/Song.java

@@ -157,11 +157,11 @@ public class Song implements Comparable<Song> {
 	}
 
 	/**
-	 * Returns true if the song is empty
+	 * Returns true if the song is filled
 	 */
-	public boolean isEmpty()
+	public boolean isFilled()
 	{
-		return id == -1;
+		return (id != -1 && path != null);
 	}
 
 	/**

src/ch/blinkenlights/android/vanilla/SongTimeline.java

@@ -37,6 +37,7 @@ import java.util.Comparator;
 import java.util.Iterator;
 import java.util.ListIterator;
 import junit.framework.Assert;
+import android.util.Log;
 
 /**
  * Contains the list of currently playing songs, implements repeat and shuffle
@@ -363,11 +364,11 @@ public final class SongTimeline {
 
 					// The query may have returned zero results or we might 
 					// have failed to populate some songs: Get rid of all
-					// uninitialized items (where path == null)
+					// uninitialized items
 					Iterator<Song> it = songs.iterator();
 					while (it.hasNext()) {
 						Song e = it.next();
-						if (e.path == null) {
+						if (e.isFilled() == false) {
 							it.remove();
 						}
 					}
@@ -683,7 +684,8 @@ public final class SongTimeline {
 		int type = query.type;
 		long data = query.data;
 
-		int count = cursor.getCount();
+		int count = cursor.getCount(); // Items found by query
+		int added = 0;                 // Items actually added to the queue
 
 		if (count == 0 && type == MediaUtils.TYPE_FILE && query.selectionArgs.length == 1) {
 			String pathQuery = query.selectionArgs[0];
@@ -743,9 +745,16 @@ public final class SongTimeline {
 
 			for (int j = 0; j != count; ++j) {
 				cursor.moveToPosition(j);
+
 				Song song = new Song(-1);
 				song.populate(cursor);
+				if (song.isFilled() == false) {
+					// Song vanished from device for some reason: we are silently skipping it.
+					continue;
+				}
+
 				timeline.add(addAtPos++, song);
+				added++;
 
 				if (jumpSong == null) {
 					if ((mode == MODE_PLAY_POS_FIRST || mode == MODE_ENQUEUE_POS_FIRST) && j == data) {
@@ -790,7 +799,7 @@ public final class SongTimeline {
 
 		changed();
 
-		return count;
+		return added;
 	}
 
 	/**