SAP Web IDE Plugin Development: More detailed API documentation

I'm a little bit playing with developing a plug-in for SAP Web IDE. I know about the documentation at https://sdk-sapwebide.dispatcher.hana.ondemand.com/ But is there more documentaton about the standard plug-ins / templates the web IDE is built of? For example, I'd be interested in subscribing to an event which fired when the user is opening an code editor (and finding out what file he is editing) or how to find out which command groups are available (e.g. to add a command in the context menu of the file tree). Where to find this kind of information?