Disable ribbon button if one folder is selected

Question

This script works but only for one selected item

 EnabledScript="javascript:
              var items = SP.ListOperation.Selection.getSelectedItems();
              (items.length == 1 && items[0].fsObjType == 0);"/>   

I need that the user can select many files or folder. If in the selection there is at least one folder, button should be disabled, if all items are just files, button should be enabled

Answer 1

I guess you can use something like this (not tested):

for (int i =0; i < items.length; i++)
{
   if (items[i].fsObjType == 1)
      return false;
}
return true;