Gtk focus proxy - where ? (related: xembed)

[Gal Aviel <galaviel bezeqint net il>]

Can someone show me where (which file) is the focus proxy implemented ?


The focus proxy is according to according to XEMBED spec


"The solution proposed by XEmbed is is to beat X11 with its own weapons: 
The topmost toolkit is /required/ to keep the X input focus on one of 
its own windows without any embedded children. Keeping the focus on such 
a window ensures that key events are always delivered to the outer 
toolkit and thus can be forwarded easily to any embedded window. This 
also makes it possible to use this part of XEmbed with clients that do 
not support the protocol at all, without breaking keyboard input for the 
embedding application."

Thanks - Gal.