Posted by R.J. Steinert on December 16, 2009 at 5:25am
I've looked high and low for web based text editor with syntax highlighting and have not found it yet. SmartMarkUp has screenshots with syntax highlighting but I don't think it actually has that feature. I'm hoping someone come up with a script to do this for MarkItUp. Looking at web based IDEs like Mozilla's Bespin gives me hope.

Comments
Good Question
If you ever found an answer to this question I would love to hear it. Anyone know of a Syntax Highlighter WYSIWYG api plugin?
Geshi Filter with the wysiwyg
Geshi Filter with the wysiwyg module and CKeditor worked for me. Took me a week to get it working though.
Any tips you can pass along
Any tips you can pass along about getting it working?
Have you had a look at this
Have you had a look at this thread? http://groups.drupal.org/node/65398#comment-198803
There was a dev Drupal 5
There was a dev Drupal 5 project on this: http://drupal.org/project/editarea
BUEditor looks to be working.
This one looks to be currently working. http://drupal.org/project/bueditor