Architecture proposal: Downward-matching CSS-like context selectors ("Luke Skywalker Options") - FLUID-4873

[Antranig Basman]

I've drawn up a JIRA summarising the immediate motivations we might have for such a system (our upcoming 
UIOptions refactoring work), a potential syntax, and some other use cases for it at

http://issues.fluidproject.org/browse/FLUID-4873

As a "potted summary", the proposal is to support this very tiny subset of the CSS selector syntax (almost 
the same as that supported within the Fluid Renderer system for "cutpoints") for what we might call "IoCSS" 
selectors which are capable of making downward assertions about the matching of a component or group of 
components below a component tree root:

* - matches any component - universal selector
E - matches any component holding a context name of E - special support for the string "that" as in current 
IoC context matching
E#myid - matches any component with a context name of E with id equal to myid

And the following two descendent rules:

E F - Matches any F element that is a descendant of an E element.
E > F - Matches any F element that is a direct child of an E element


Please supply comments, suggestions, questions, and improvements - if we have some time at today's community 
meeting we could also discuss this a bit -

Cheers,

A