Looking for a C++ parser for XUL & CSS

Hi,
  I'm very interested in XUL and I am currently using it on top of Mozilla.
However for another personal project I'd like to use XUL & CSS as a
description for the UI of OpenOffice.org. 
OpenOffice.org is written in C++ and already has cross platform widget
rendering, so what I then really need is a XUL & CSS parser and DOM
generator from which I would like to use the OpenOffice.org framework to
render the DOM. I'd prefer that the parser and DOM generator to be C++ if
anyone knows of one.

If it was possible to structure Mozilla code into such it would be
brilliant.

Thanks
CPH



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