Peer-nodal.as

// Liscenced under LGPL: www.gnu.org/copyleft/lesser.html //Template:As // peer-nodal.as - ecma-script implementation of the nodal core // Nad - 2006 //

// ISSUES // - associations (maintained class:instance relationships) // - get should use class content as default - resolve() doesn't // so either add get/set which use resolve, or remove object-freedom and have only .data

// NODAL PROPERTIES & CORE NODAL CONCEPTS // - all-capital-identifiers are node-references // - ROOT.idcount is a accumulating-only counter for locally-unique-id number // - ROOT.nodes is the current number of instantiated node objects ROOT = { idcount: 0, nodes: 0 }; VOID = ROOT; INIT = new node( ROOT ); // Default method executed if quanta sent to empty/new association NEXT = new node( ROOT ); PREV = new node( ROOT ); FUNC = new node( ROOT ); FOCUS = new node( ROOT );

// NODE OBJECT // - note: only a node's parent can adjust a nodes prev/next function node( key ) { ROOT.nodes++; this.id = ROOT.idcount++; this.set( [FOCUS], key.get( [INIT] ) ); }

// NODAL METHODS // - the delete-list is only needed for limited list-space env // - Actionscript failed ref-as-hashkey test, // so we use a id (locally unique identifier) as a lookup-key // - no delete currently // - just get/set properties with normal object-accessor way // - but keep all hierarchy nodal

node.prototype.set = function( path, value ) { var ptr = this._resolve( path ); ptr.value = value; };

node.prototype.get = function( path ) { var ptr = this._resolve( path ); // need to return class.value onNonExistent return ptr.value; };

// Resolve creates if non existent and returns reference to result // - this is private, used by get/set node.prototype._resolve = function( path ) { var context = this; while( path.length ) { var key = path.shift(); context = context[key.id] == null ? context[key.id] = new node( key ) : context[ key.id ]; } return context; };

// Consume one quanta // - each quantum is actually two, one for local instance, one for global class // - all instance-loops work by going cd this.current then assigning this.current.next to it // when a function executes, it can update the loop at that location (equiv to array.push) // - a functions parameters (and even further methods and tools) are child associations // the structures necessary to build the fucntion are child assocs too node.prototype.reduce = function() {

// Rotate this level's queue var ptr = this.get( [FOCUS] ); this.set( [FOCUS], this.get( [FOCUS,NEXT] ) );

// If there's a local function declaration, execute var ref = ptr.get( [FUNC] ); if ( ref != VOID ) { ref = ref.call( ptr ); if ( ref == VOID ) { // Remove focus from loop ptr.set( [NEXT,PREV], ptr.get( [PREV] ) ); // ptr.next.prev = ptr.prev ptr.set( [PREV,NEXT], ptr.get( [NEXT] ) ); // ptr.prev.next = ptr.next } else if ( ref != ptr ) { // Replace current ptr with result-ref ref.set( [NEXT], ptr.get( [NEXT] ) ); // ref.next = ptr.next ref.set( [PREV], ptr.get( [PREV] ) ); // ref.prev = ptr.prev ptr.set( [NEXT,PREV], ref ); // ptr.next.prev = ref ptr.set( [PREV,NEXT], ref ); // ptr.prev.next = ref }

// also call class.reduce()

}

// if not, send the quanta downstairs if there's anything in its loop else if ( ptr = ptr.get( [FOCUS] ) != VOID ) ptr.reduce();

};