I don't understand too well how Squeak's styled text works.  However,  
my Google Summer of Code intern has some questions about it that I'm  
hoping someone more knowledgeable can answer.
This is some <b>bold</b> text.

I'm sure you get that.  CSS uses a box model.  Useful diagram here:  
http://www.w3.org/TR/REC-CSS2/box.html
He's trying to figure out what to do if the user creates a style that  
says the b style has 20 pixel margins with a line border.  How does  
he get the text to layout right and get the size/shape of the  
enclosure to draw the borders?  Extra tricky if the bold section  
wraps for some fraction of lines.  Is there an easy api he can use to  
embed wrappers around styles such that he can fiddle the margins/ 
borders?

Thanks,
-Todd