/*! Copyright (c) 2010 Brandon Aaron (http://brandonaaron.net)
 * Licensed under the MIT License (LICENSE.txt).
 *
 * Thanks to: http://adomas.org/javascript-mouse-wheel/ for some pointers.
 * Thanks to: Mathias Bank(http://www.mathias-bank.de) for a scope bug fix.
 * Thanks to: Seamus Leahy for adding deltaX and deltaY
 *
 * Version: 3.0.4
 * 
 * Requires: 1.2.2+
 */

(function($) {

var types = ['DOMMouseScroll', 'mousewheel'];

$.event.special.mousewheel = {
    setup: function() {
        if ( this.addEventListener ) {
            for ( var i=types.length; i; ) {
                this.addEventListener( types[--i], handler, false );
            }
        } else {
            this.onmousewheel = handler;
        }
    },
    
    teardown: function() {
        if ( this.removeEventListener ) {
            for ( var i=types.length; i; ) {
                this.removeEventListener( types[--i], handler, false );
            }
        } else {
            this.onmousewheel = null;
        }
    }
};

$.fn.extend({
    mousewheel: function(fn) {
        return fn ? this.bind("mousewheel", fn) : this.trigger("mousewheel");
    },
    
    unmousewheel: function(fn) {
        return this.unbind("mousewheel", fn);
    }
});


function handler(event) {
    var orgEvent = event || window.event, args = [].slice.call( arguments, 1 ), delta = 0, returnValue = true, deltaX = 0, deltaY = 0;
    event = $.event.fix(orgEvent);
    event.type = "mousewheel";
    
    // Old school scrollwheel delta
    if ( event.wheelDelta ) { delta = event.wheelDelta/120; }
    if ( event.detail     ) { delta = -event.detail/3; }
    
    // New school multidimensional scroll (touchpads) deltas
    deltaY = delta;
    
    // Gecko
    if ( orgEvent.axis !== undefined && orgEvent.axis === orgEvent.HORIZONTAL_AXIS ) {
        deltaY = 0;
        deltaX = -1*delta;
    }
    
    // Webkit
    if ( orgEvent.wheelDeltaY !== undefined ) { deltaY = orgEvent.wheelDeltaY/120; }
    if ( orgEvent.wheelDeltaX !== undefined ) { deltaX = -1*orgEvent.wheelDeltaX/120; }
    
    // Add event and delta to the front of the arguments
    args.unshift(event, delta, deltaX, deltaY);
    
    return $.event.handle.apply(this, args);
}

})(jQuery);

// mouse intent
/**
 * @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);