Subj : Re: JS_ResolveStandardClass and my 'DOM'
To   : Bruce Wheaton
From : Brendan Eich
Date : Wed Sep 15 2004 02:07 pm

Bruce Wheaton wrote:
> I'd like to make my own object hierarchy, similar to Flash etc. I saw the
> thread about lazy evaluation. Can I use this through a calling chain? Say I
> want to use a function in a script:
> 
> show.module3.cue5.GotoAndPlay("Start")
> 
> The show object is the base of my tree (I don't think it needs to be the
> global object, does it?) then module3 and cue5 are objects that I wouldn't
> create unless needed.
> 
> Can I do that? 


Sure.


> Ideally, when the script compiles first, I would create the
> objects as needed and root them.


The objects are linked by property ids to containing objects, up to the 
global object, so you don't need to root anything.


> So my global class has something called a 'resolve op' (which I haven't
> tracked down yet) from which I call JS_ResolveStandardClass? And then again
> for the child?


JS_ResolveStandardClass is for Date, RegExp, etc.  For your purposes, 
you need that global_resolve to define show when it is first resolved. 
The class for the show object should have a resolve hook that handles 
module3 (and any other such names), defining the id being resolved with 
value referring to the next object in the chain, cue5 -- but only if and 
when id == 'cue5' is passed into module_resolve.

Thus you get lazy construction of a tree of objects.

/be

.