this.getFirstIndex() : this.getIndexBelow(leadIndex);
break;
case 'Left':
+ case 'MediaPreviousTrack':
newIndex = leadIndex == -1 ?
this.getLastIndex() : this.getIndexBefore(leadIndex);
break;
case 'Right':
+ case 'MediaNextTrack':
newIndex = leadIndex == -1 ?
this.getFirstIndex() : this.getIndexAfter(leadIndex);
break;