ReadOnly(obj,mask) added to utils.js

Bradley Meck · Bradley Meck · commit bdd270ce7dc5 · 2010-06-09T16:41:59.000-05:00
diff --git a/util.js b/util.js
@@ -0,0 +1,51 @@
+var overload=require("./overload")
+, Watchable = overload.Watchable
+, RePrototype = overload.RePrototype
+
+exports.ReadOnly=ReadOnly=function(obj,mask) {
+	var $this=Watchable(function(args){
+		var v=mask
+		&& args.property in mask
+			? mask[args.property]
+			: obj[args.property];
+		if(typeof(v)=="function") {
+			return function(){return v.apply(obj,arguments)}
+		}
+		return v;
+	});
+	//only objects have prototypes
+	if(obj instanceof Object) {
+		RePrototype($this,Object.getPrototypeOf(obj))
+	}
+	return $this;
+}
+var noop=function(){}
+ReadOnly.ArrayMask={
+	pop:function(){return this[this.length-1];}
+	,push:function(){return this.length}
+	,reverse:noop
+	,shift:function(){return this[0];}
+	,sort:noop
+	,splice:function(){return [];}
+	,unshift:function(){return this.length}
+}
+ReadOnly.DateMask={
+	setDate:noop
+	,setFullYear:noop
+	,setHours:noop
+	,setMilliseconds:noop
+	,setMinutes:noop
+	,setMonth:noop
+	,setSeconds:noop
+	,setTime:noop
+	,setUTCDate:noop
+	,setUTCFullYear:noop
+	,setUTCHours:noop
+	,setUTCMilliseconds:noop
+	,setUTCMinutes:noop
+	,setUTCMonth:noop
+	,setUTCSeconds:noop
+	,setYear:noop
+}
+ReadOnly.StringMask={}
+delete noop;
