How to refactor a Delphi unit with 10000 lines with no documentation?

Question

I have been assigned the task to refactor a Delphi unit. Wow. 10000 lines of code, no documentation, tons of copy and paste code.

THere are many methods made with copy a

Answer 1

In addition of understanding the code etc, these tools may help refactoring and reorganizing the project:

Model Maker is powerful design, reverse-engineer and refactoring tool: http://www.modelmakertools.com/modelmaker/index.html

Model Maker Code Explorer is powerful plugin for Delphi IDE to help with refactoring, code navigation etc: http://www.modelmakertools.com/code-explorer/index.html