We are developing an ide that enables registered users online editing of basically any programming language code and we need a html code editor with extensible markup, auto completion, tabbing and similar functionality but none of the existing solutions perform quite fast or reliable enough with lots of code.
The IDE we're developing uses Ext for javascript enabled part since it is the best thing out there so it would be perfect if anything like this already existed in Ext. I was looking at Ext.form.HtmlEditor but I'm not sure it provides everything we need.