Groff macro to make .UR and .UE links clickable in PDF?

[B 9]

Hi!

I've been writing up a lengthy man page using -mdoc and it's been
great so far. I love that I can also easily create a beautiful PDF
document using groff -Tpdf. But there is one problem I haven't solved:
How can I make links which I've declared using .UR and .UE into actual
clickable links in the PDF?

I know that I can create a link using .pdfmark, but that is not a good
solution as pdfmark text completely disappears when using nroff.

I was thinking I may need to redefine mdoc's UR and UE macros so that, if 
the device output is to PDF, it will convert the link to pdfmark syntax. 
Unfortunately, I do not know how to do that, so I was hoping that someone
has encountered this problem before and can point me to the solution.

Here is an example of what I might have in my groff code:

    The main page for Madness is
    .UR http://www.frijid.net/madness/madness.html
    http://www.frijid.net/\:madness/\:madness.html
    .UE .

It works great using ncurses, but when creating a PDF, I'd like groff
to act as if I had entered something like:

    .pdfhref W -P "The main page for Madness is " -D 
http://www.frijid.net/madness/madness.html -A . --  
http://www.frijid.net/\:madness/\:madness.html

Any help that can be provided, even if it is just saying that no such
thing exists, yet, would be much appreciated.

--b9