flymis/WebRoot/dojojs/src/lang/repr.js

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/*
	Copyright (c) 2004-2006, The Dojo Foundation
	All Rights Reserved.

	Licensed under the Academic Free License version 2.1 or above OR the
	modified BSD license. For more information on Dojo licensing, see:

		http://dojotoolkit.org/community/licensing.shtml
*/

dojo.provide("dojo.lang.repr");

dojo.require("dojo.lang.common");
dojo.require("dojo.AdapterRegistry");
dojo.require("dojo.string.extras");

dojo.lang.reprRegistry = new dojo.AdapterRegistry();
dojo.lang.registerRepr = function(/*String*/name, /*Function*/check, /*Function*/wrap, /*Boolean?*/override){
	// summary:
	//	Register a repr function.  repr functions should take
	//	one argument and return a string representation of it
	//	suitable for developers, primarily used when debugging.
	//
	//	If override is given, it is used as the highest priority
	//	repr, otherwise it will be used as the lowest.

	dojo.lang.reprRegistry.register(name, check, wrap, override);
};

dojo.lang.repr = function(/*Object*/obj){
	// summary: Return a "programmer representation" for an object
	// description: returns a string representation of an object suitable for developers, primarily used when debugging

	if(typeof(obj) == "undefined"){
		// obj: undefined
		return "undefined"; // String
	}else if(obj === null){
		// obj: null
		return "null"; // String
	}

	try{
		if(typeof(obj["__repr__"]) == 'function'){
			return obj["__repr__"]();
		}else if((typeof(obj["repr"]) == 'function')&&(obj.repr != arguments.callee)){
			return obj["repr"]();
		}
		return dojo.lang.reprRegistry.match(obj);
	}catch(e){
		if(typeof(obj.NAME) == 'string' && (
				obj.toString == Function.prototype.toString ||
				obj.toString == Object.prototype.toString
			)){
			return obj.NAME; // String
		}
	}

	if(typeof(obj) == "function"){
		// obj: Function
		obj = (obj + "").replace(/^\s+/, "");