text: ﻿/*!
   * hoverIntent r7 // 2013.03.11 // jQuery 1.9.1+
   * 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.
   * Copyright 2007, 2013 Brian Cherne
   */
   
  /* 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($) {
      'use strict';
      $.fn.hoverIntent = function(handlerIn,handlerOut,selector) {
  
          // default configuration values
          var cfg = {
              interval: 100,
              sensitivity: 7,
              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.abs(pX-cX) + Math.abs(pY-cY) ) < cfg.sensitivity ) {
                  $(ob).off("mousemove.hoverIntent",track);
                  // set hoverIntent state to true (so mouseOut can be called)
                  ob.hoverIntent_s = 1;
                  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 = 0;
              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 != 1) { 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 == 1) { 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);
  