[xslt] XSLT and Safari

[David Hyatt <hyatt apple com>]

Hello.  My name is Dave Hyatt, and I work on WebCore, the open-source 
layout engine that powers the Safari Web Browser.  Some time ago we 
switched away from expat to libxml2 for all our XML parsing, and now 
I'm working on integrating libxslt into Safari.

Because it's necessary to do our own loading (I could go into this in 
more detail, but there are many reasons), and because it's also 
insufficient to override libxml's I/O routines (we can't easily mesh 
the way we load with libxml's model of I/O), I'm taking the approach of 
loading the stylesheets myself.

I can figure out all the imports/includes, use our own security 
routines and recursion defenses when loading, and ultimately end up 
with a bunch of xmlDocPtrs.  What I'd then like to do is be able to 
tell libxslt to parse a top-level stylesheet, but then register 
callbacks, so that for a given import/include URI in a specified parent 
stylesheet, I could then hand back the xmlDocPtr without libxslt having 
to do any I/O.  I'm not trying to reuse these xmlDocPtrs, so libxslt 
would be free to modify them if it needed to.

Does this sound like a reasonable request?

Thanks,
dave
(hyatt apple com)