Howto detect what theme an user is having

Dear Drupal freinds,

How can I detect what theme an user is having and direct the code according to that

For example in the following

drupal_add_css($path .'/bueditor.css');
drupal_add_js($path .'/bueditor.js');

I will like to have garland users see BUE editor
and non garland users not see BUE editor

How can the $path be modified according to the user theme?