Actually, RescueTime does know and report on what file / project you have open inside the text editor, as long as the info is in the window title (which both these apps do). And it's keyword-searchable by whatever is in that data point-- usually filename, project name, directory tree etc. It works this way with just about all text editors.

The key word search method is how people usually accomplish the idea of project reporting-- but is admittedly not perfect, like you could get if we actually could consume that meta data.

However, the "document" level details are only exposed to you in the premium version-- in the free version you just get an open document count, so that is a significant difference.

I've always thought the long term path for an enriched time measurement experience would involve plugins like this one. Great to see someone working on it.

Disclosure: I'm a RescueTime employee.