CodeMirror - an AST aware in-browser code editor

I have been following for a while now the development of Javascript based code editors and web IDEs (see here and here), I even started to build one myself, because I thought there is no such AST aware editor out there, at least until I discovered codemirror, which comes with support for Javascript and HTML, and with support I mean it has a real parser (and a CSS file for syntax highlighting) for those languages. Marijn Haverbeke, the author of this masterpiece of functional Javascript programming has released today a new version, which makes it easy to integrate it with a different Javascript libraries (codemirror itself uses MochiKit).

Codemirror has the following features:

• syntax highlighting
• automatic code indentation of current line on pressing TAB or RETURN
• if some code it selected, automatic indentation of current selection on pressing TAB
• works with all common modern browsers
• highly configurable: additional languages, performance settings, etc.