Add swipe action to clear queue

res/values/arrays.xml

@@ -53,6 +53,7 @@ THE SOFTWARE.
 		<item>Enqueue Current Album</item>
 		<item>Enqueue Current Artist</item>
 		<item>Enqueue Current Genre</item>
+		<item>Clear Queue</item>
 	</string-array>
 	<string-array name="entry_values">
 		<!-- Note: even if this was an integer-array, these would be converted
@@ -68,5 +69,6 @@ THE SOFTWARE.
 		<item>7</item>
 		<item>8</item>
 		<item>9</item>
+		<item>10</item>
 	</string-array>
 </resources>

res/values/strings.xml

@@ -42,6 +42,7 @@ THE SOFTWARE.
 		<item quantity="one">1 song enqueued.</item>
 		<item quantity="other">%d songs enqueued.</item>
 	</plurals>
+	<string name="queue_cleared">Queue cleared.</string>
 
 	<!-- Widgets -->
 	<string name="starting">Starting up...</string>

src/org/kreed/vanilla/PlaybackActivity.java

@@ -49,6 +49,7 @@ public class PlaybackActivity extends Activity implements Handler.Callback, View
 	public static final int ACTION_ENQUEUE_ALBUM = 7;
 	public static final int ACTION_ENQUEUE_ARTIST = 8;
 	public static final int ACTION_ENQUEUE_GENRE = 9;
+	public static final int ACTION_CLEAR_QUEUE = 10;
 
 	public static int mUpAction;
 	public static int mDownAction;
@@ -402,6 +403,10 @@ public class PlaybackActivity extends Activity implements Handler.Callback, View
 		case ACTION_ENQUEUE_GENRE:
 			enqueue(MediaUtils.TYPE_GENRE);
 			break;
+		case ACTION_CLEAR_QUEUE:
+			ContextApplication.getService().clearQueue();
+			Toast.makeText(this, R.string.queue_cleared, Toast.LENGTH_SHORT).show();
+			break;
 		default:
 			throw new IllegalArgumentException("Invalid action: " + action);
 		}

src/org/kreed/vanilla/PlaybackService.java

@@ -1041,6 +1041,14 @@ public final class PlaybackService extends Service implements Handler.Callback,
 		return count;
 	}
 
+	/**
+	 * Clear the song queue.
+	 */
+	public void clearQueue()
+	{
+		mTimeline.clearQueue();
+	}
+
 	/**
 	 * Reset the position at which songs are enqueued. That is, the next song
 	 * enqueued will be placed directly after the playing song.

src/org/kreed/vanilla/SongTimeline.java

@@ -439,6 +439,19 @@ public final class SongTimeline {
 		}
 	}
 
+	/**
+	 * Clear the song queue.
+	 */
+	public void clearQueue()
+	{
+		synchronized (this) {
+			mSongs.subList(mCurrentPos + 1, mSongs.size()).clear();
+			mQueueOffset = 0;
+		}
+
+		mCallback.songReplaced(+1, getSong(+1));
+	}
+
 	/**
 	 * Remove the song with the given id from the timeline.
 	 *