How to write a Google Doc type rich text editor

I need to write a rich text editor similar to Google Doc. Does anyone know any s开发者_如何学JAVAamples of similar projects? What technologies will I need? and what process is involved?

Check out ckEditor or TinyMCE for examples.

I would take an existing text-editing tool and customize it from there. All the code is there for your tweaking. I still haven't found an web-based RTE that I'm in love with, but the YUI 2 rich text editor would have to be my recommendation. It has a simple and clean interface if you're looking for something Google Doc-ish.