can/bower_components/mootools/Source/Types/Function.js

MIT-licensed, client-side, JavaScript framework that makes building rich web applications easy.

/*
---

name: Function

description: Contains Function Prototypes like create, bind, pass, and delay.

license: MIT-style license.

requires: Type

provides: Function

...
*/

Function.extend({

	attempt: function(){
		for (var i = 0, l = arguments.length; i < l; i++){
			try {
				return arguments[i]();
			} catch (e){}
		}
		return null;
	}

});

Function.implement({

	attempt: function(args, bind){
		try {
			return this.apply(bind, Array.from(args));
		} catch (e){}

		return null;
	},

	/*<!ES5-bind>*/
	bind: function(that){
		var self = this,
			args = arguments.length > 1 ? Array.slice(arguments, 1) : null,
			F = function(){};

		var bound = function(){
			var context = that, length = arguments.length;
			if (this instanceof bound){
				F.prototype = self.prototype;
				context = new F;
			}
			var result = (!args && !length)
				? self.call(context)
				: self.apply(context, args && length ? args.concat(Array.slice(arguments)) : args || arguments);
			return context == that ? result : context;
		};
		return bound;
	},
	/*</!ES5-bind>*/

	pass: function(args, bind){
		var self = this;
		if (args != null) args = Array.from(args);
		return function(){
			return self.apply(bind, args || arguments);
		};
	},

	delay: function(delay, bind, args){
		return setTimeout(this.pass((args == null ? [] : args), bind), delay);
	},

	periodical: function(periodical, bind, args){
		return setInterval(this.pass((args == null ? [] : args), bind), periodical);
	}

});

//<1.2compat>

delete Function.prototype.bind;

Function.implement({

	create: function(options){
		var self = this;
		options = options || {};
		return function(event){
			var args = options.arguments;
			args = (args != null) ? Array.from(args) : Array.slice(arguments, (options.event) ? 1 : 0);
			if (options.event) args = [event || window.event].extend(args);
			var returns = function(){
				return self.apply(options.bind || null, args);
			};
			if (options.delay) return setTimeout(returns, options.delay);
			if (options.periodical) return setInterval(returns, options.periodical);
			if (options.attempt) return Function.attempt(returns);
			return returns();
		};
	},

	bind: function(bind, args){
		var self = this;
		if (args != null) args = Array.from(args);
		return function(){
			return self.apply(bind, args || arguments);
		};
	},

	bindWithEvent: function(bind, args){
		var self = this;
		if (args != null) args = Array.from(args);
		return function(event){
			return self.apply(bind, (args == null) ? arguments : [event].concat(args));
		};
	},

	run: function(args, bind){
		return this.apply(bind, Array.from(args));
	}

});

if (Object.create == Function.prototype.create) Object.create = null;

var $try = Function.attempt;

//</1.2compat>