How to detect intersection with SVG form in Fabric.js?

Question

First of all, look at this example.

http://radykal.de/fabric/

I would like to detect when the text moves along the blue outline of the svg form. The black figure is an SVG that I load with loadSVGFromURL().

I am currently using the isContainedWithinObject () method to determine if text is contained in the svg form, but it uses the rectangular bounding box of the svg form to detect.

Is it possible to detect it using the actual svg image path?

Thanks.