Occasionally we get questions along these lines on the newsgroups:
Does anybody know how X is coded in Eclipse?
The simple answer is yes. Everybody can know how it’s coded. The source code is out there for all to see.
You have a couple of choices when it comes to viewing source code from Eclipse projects. If you want to do it the hard way, you can use the handy ViewCVS utility to browse through the various CVS and SVN repositories.