[Pharo-users] Rubric architecture

Cheers, Is there any documentation about the architecture of Rubric? At the moment I feel like I am up to my ears in Editor, EditingModes, EditingStates, Areas, the occasional morphs, Paragraphs etc. Besides, I am not even sure I should be looking at Rubric. RubAbstractTextArea>>class comment: "I am a re-implementation of TextMorph. I'm intended as a temporary solution. Soon, I will be replaced by, or integrated with, TxText, a beautiful new text toolkit.” Editor>>class comment: "New text editors.” Hmm - since there is no dates in there, and Smalltalk is old, “soon” or “new” is kind of hard to figure out. Best, Kasper