Offline text editor for Drupal docs

This is something for Santa's wishlist...

I've been thinking there must be at least a few cross-platform open source editing tools that are capable of parsing html from a given URL so I'm wondering if it wouldn't be possible to extend or customize one of them just a little to become a hugely useful power tool for working with the Drupal docs. Here's how it would work:

- In the text editor, the user provides the edit url of a node (eg http://drupal.org/node/176052/edit)
- The text editor sucks in the HTML from that address, parses it to isolate the text in the node body field and presents it to the user for editing.
- The user then exploits all the power of the tool (code coloring, macros, search and replace, drag and drop, etc) to perform his or her edits.
- The user clicks Save and is prompted for the log message.
- The text editor checks the edit history to make sure noone else has edited the page in the interim, and pushes the content back to drupal.org as if it was a normal browser-based edit.

I'm guessing that nothing on d.o would need change and that an existing tool like Eclipse could be extended a little bit to do what's needed. I'm also wondering if someone somewhere hasn't already done something similar as it would seem like an amazingly useful tool for many Drupal (and WordPress etc.) .

Only a tiny number of people would probably use something like this, but they would be your power users who could really boost their productivity.