We've spent twenty years working on HTML to PDF conversion and I expect we could easily spend another twenty years, so feel free to give Prince a try if you would rather avoid the headache :)
Normally when we are nearly there we say its 95% done and only 95% of the work remains. If your feeling is you are half done I suspect more than 50% of the work remains!
What I know having done a lot in this space is we aren't close!
Absolutely! The CSS support, layout engine, PDF output, and JavaScript interpreter are all written in Mercury, while the font support that was originally a mix of Mercury and C has now been rewritten as a standalone Rust project, Allsorts.
