もっとスクリプトを簡単に書くために

ライブラリの強化中。
こんな風に書けたら幸せになれるかしら。

c(activeDocument.groupItems).filter('selection').each(
function(){
$.writeln(this.typename);
}).length;

最終目標はワンライナー。（あくまでも目標です。）

c('G').f('S').e(function(){$.writeln(this.typename);});

スクリプト自体はこんな感じ。

var c  = function(s){		
	return new c.prototype.init(s);
}
c.fn = c.prototype = {
	"init" : function (s) {
		
		if(typeof s == "undefined"){
			//s = app.activeDocument.selection;
			$.writeln("false");
			return false;
		}
		
		switch(typeof s.length){
		  case 'number' :
		  			for(var i = 0 ; i < s.length; i++)this[i] = s[i];
		  			this.length = s.length;
		  			break;
		  default : 
		  			this[0] = s;
		  			this.length = 1;
		  			
		}
		return this;
	},
};

c.extend = c.fn.extend = function(target,source) {
        for (var property in source) {
        target.prototype[property] = source[property];
        }
        return target;
}
c.prototype.init.prototype = c.prototype;
var extend = {
	  	"each" : function(fnc,arg) {
			if(typeof fnc == 'function'){
			for(var i = 0;i<this.length;i++){
					fnc.call(this[i],this[i],arg);
			};
		};
		return this;
   	 	},
   	 	"filter" : function(arg){
			if(!arg) return this;
   	 		var s = [];
   	 		
   	 		var f =function(val){
   	 		switch(val){
   	 		case "TextFrame" : 
   	 			this.each(function(){
   	 			this.typename == 'TextFrame' && s.push(this);
   	 			this.typename == 'GroupItem' && c(this.textFrames).each(function(){s.push(this)});
   	 			});
   	 			break;
   	 		case "GroupItem" : 
   	 			this.each(function(){
   	 			this.typename == 'GroupItem' && s.push(this);
   	 			});
   	 			break;
   	 		case "PathItem" : 
   	 			this.each(function(){
   	 				this.typename == 'PathItem' && s.push(this);
   	 				this.typename == 'GroupItem' && c(this.pathItems).each(function(){s.push(this)});
   	 			});
   	 			break;
			
			case "PathPoint" : 
				this.each(function(){
					this.typename == 'PathItem' && c(this.pathPoints).each(function(){s.push(this)});
					this.typename == 'GroupItem' && c(this.pathItems).each(function(){c(this.pathPoints).each(function(){s.push(this)})});
				});
				break;
			
   	 		case "selection" :
   	 			
   	 			this.each(function(){
   	 			//$.bp();
   	 				this.selected == true && s.push(this);
   	 				this.selected == "PathPointSelection.ANCHORPOINT" && s.push(this);
   	 				});
   	 			break;
   	 		}
   	 			
   	 		}
   	 		
   	 		f.call(this,arg);
   	 	return c(s);
   	 	}
}

c.extend(c,extend);
c.extend(Array,extend);
//c.extend(Object,extend);

いろいろ試行錯誤中。