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/*!

* hoverIntent v1.8.0 // 2014.06.29 // jQuery v1.9.1+

* http://cherne.net/brian/resources/jquery.hoverIntent.html

* You may use hoverIntent under the terms of the MIT license. Basically that

* means you are free to use hoverIntent as long as this header is left intact.

/* hoverIntent is similar to jQuery's built-in "hover" method except that

* instead of firing the handlerIn function immediately, hoverIntent checks

* to see if the user's mouse has slowed down (beneath the sensitivity

* threshold) before firing the event. The handlerOut function is only

* called after a matching handlerIn.

* // basic usage ... just like .hover()

* .hoverIntent( handlerIn, handlerOut )

* .hoverIntent( handlerInOut )

* // basic usage ... with event delegation!

* .hoverIntent( handlerIn, handlerOut, selector )

* .hoverIntent( handlerInOut, selector )

* // using a basic configuration object

* .hoverIntent( config )

* @param  handlerIn   function OR configuration object

* @param  handlerOut  function OR selector for delegation OR undefined

* @param  selector    selector OR undefined

* @author Brian Cherne <brian(at)cherne(dot)net>

(function($) {

$.fn.hoverIntent = function(handlerIn,handlerOut,selector) {

// default configuration values

var cfg = {

interval: 100,

sensitivity: 1,

timeout: 0

};

if ( typeof handlerIn === "object" ) {

cfg = $.extend(cfg, handlerIn );

} else if ($.isFunction(handlerOut)) {

cfg = $.extend(cfg, { over: handlerIn, out: handlerOut, selector: selector } );

} else {

cfg = $.extend(cfg, { over: handlerIn, out: handlerIn, selector: handlerOut } );

}

// instantiate variables

// cX, cY = current X and Y position of mouse, updated by mousemove event

// pX, pY = previous X and Y position of mouse, set by mouseover and polling interval

var cX, cY, pX, pY;

// A private function for getting mouse position

var track = function(ev) {

cX = ev.pageX;

cY = ev.pageY;

};

// A private function for comparing current and previous mouse position

var compare = function(ev,ob) {

ob.hoverIntent_t = clearTimeout(ob.hoverIntent_t);

// compare mouse positions to see if they've crossed the threshold

if ( Math.sqrt( (pX-cX)*(pX-cX) + (pY-cY)*(pY-cY) ) < cfg.sensitivity ) {

$(ob).off("mousemove.hoverIntent",track);

// set hoverIntent state to true (so mouseOut can be called)

ob.hoverIntent_s = true;

return cfg.over.apply(ob,[ev]);

} else {

// set previous coordinates for next time

pX = cX; pY = cY;

// use self-calling timeout, guarantees intervals are spaced out properly (avoids JavaScript timer bugs)

ob.hoverIntent_t = setTimeout( function(){compare(ev, ob);} , cfg.interval );

}

};

// A private function for delaying the mouseOut function

var delay = function(ev,ob) {

ob.hoverIntent_t = clearTimeout(ob.hoverIntent_t);

ob.hoverIntent_s = false;

return cfg.out.apply(ob,[ev]);

};

// A private function for handling mouse 'hovering'

var handleHover = function(e) {

// copy objects to be passed into t (required for event object to be passed in IE)

var ev = $.extend({},e);

var ob = this;

// cancel hoverIntent timer if it exists

if (ob.hoverIntent_t) { ob.hoverIntent_t = clearTimeout(ob.hoverIntent_t); }

// if e.type === "mouseenter"

if (e.type === "mouseenter") {

// set "previous" X and Y position based on initial entry point

pX = ev.pageX; pY = ev.pageY;

// update "current" X and Y position based on mousemove

$(ob).on("mousemove.hoverIntent",track);

// start polling interval (self-calling timeout) to compare mouse coordinates over time

if (!ob.hoverIntent_s) { ob.hoverIntent_t = setTimeout( function(){compare(ev,ob);} , cfg.interval );}

// else e.type == "mouseleave"

} else {

// unbind expensive mousemove event

$(ob).off("mousemove.hoverIntent",track);

// if hoverIntent state is true, then call the mouseOut function after the specified delay

if (ob.hoverIntent_s) { ob.hoverIntent_t = setTimeout( function(){delay(ev,ob);} , cfg.timeout );}

}

};

// listen for mouseenter and mouseleave

return this.on({'mouseenter.hoverIntent':handleHover,'mouseleave.hoverIntent':handleHover}, cfg.selector);

};

})(jQuery);

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