Jojo-Schmitz

// Apply the given function to all notes in selection
// or, if nothing is selected, in the entire score
function applyToNotesInSelection(func) {
      if (typeof curScore === 'undefined')
            return;

      var cursor     = new Cursor(curScore);
      cursor.goToSelectionStart();
      var startStaff  = cursor.staff;
      cursor.goToSelectionEnd();