[wp-hackers] checking if post has shortcode, before header is output?

[Kevin Newman]

Hello,

Is there anyway to check if there your registered shortcode (for a 
plugin) is being used in the current post, during some action hook 
before the header is output? The idea would be to include CSS and JS 
files for the shortcode, only on pages that actually use the shortcode. 
I'm doing it inline right now, since wp_enqueue_script is not available 
where the shortcode is dealt with.

Thanks,

Kevin N.