[cairo] editing a loaded SVG file

[Simon Flannery]

Using cario with rsvg is it possible (I really should say "easy") to (1) load a SVG file from disk and then (2) edit the nodes/vertics by simply clicking and dragging them and then (3) saving the SVG to disk again.
 
I know items 1 and 3 are easy, but what about infrastructure for item 2? When we load a SVG from disk (or memory) cario gives us a simple handle? But how do we access the vertices (or even the DOM) of the graphic???
 
Thanks in advance.
 
Simon

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