/**

 * @author trixta

 * @version 1.2

 */

(function($){



var mwheelI = {

			pos: [-260, -260]

		},

	minDif 	= 3,

	doc 	= document,

	root 	= doc.documentElement,

	body 	= doc.body,

	longDelay, shortDelay

;



function unsetPos(){

	if(this === mwheelI.elem){

		mwheelI.pos = [-260, -260];

		mwheelI.elem = false;

		minDif = 3;

	}

}



$.event.special.mwheelIntent = {

	setup: function(){

		var jElm = $(this).bind('mousewheel', $.event.special.mwheelIntent.handler);

		if( this !== doc && this !== root && this !== body ){

			jElm.bind('mouseleave', unsetPos);

		}

		jElm = null;

        return true;

    },

	teardown: function(){

        $(this)

			.unbind('mousewheel', $.event.special.mwheelIntent.handler)

			.unbind('mouseleave', unsetPos)

		;

        return true;

    },

    handler: function(e, d){

		var pos = [e.clientX, e.clientY];

		if( this === mwheelI.elem || Math.abs(mwheelI.pos[0] - pos[0]) > minDif || Math.abs(mwheelI.pos[1] - pos[1]) > minDif ){

            mwheelI.elem = this;

			mwheelI.pos = pos;

			minDif = 250;

			

			clearTimeout(shortDelay);

			shortDelay = setTimeout(function(){

				minDif = 10;

			}, 200);

			clearTimeout(longDelay);

			longDelay = setTimeout(function(){

				minDif = 3;

			}, 1500);

			e = $.extend({}, e, {type: 'mwheelIntent'});

            return $.event.handle.apply(this, arguments);

		}

    }

};

$.fn.extend({

	mwheelIntent: function(fn) {

		return fn ? this.bind("mwheelIntent", fn) : this.trigger("mwheelIntent");

	},

	

	unmwheelIntent: function(fn) {

		return this.unbind("mwheelIntent", fn);

	}

});



$(function(){

	body = doc.body;

	//assume that document is always scrollable, doesn't hurt if not

	$(doc).bind('mwheelIntent.mwheelIntentDefault', $.noop);

});

})(jQuery);