[Gimp-developer] Which package contains source code for the Scissor Selection tool

[Minh-Long Hoàng <mdhoang2003 yahoo com>]

 I am trying to write a program that allows the user to use the mouse to select an object of a photo by 
clicking points around the object. My code should create a patch around the object and then copy a the 
enclosed region. This functionality is exactly how the Scissor Selection tool of GIMP works. I tried to 
download GIMP source code to see how this feature was implemented by GIMP developers. However, there are so 
many packages and I could not find the source files that has the code for the Scissor Selection tool 
(LiveWire algorithm).