/*!

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* hoverIntent v1.10.2 // 2020.04.28 // jQuery v1.7.0+

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* http://briancherne.github.io/jquery-hoverIntent/

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*

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

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

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* Copyright 2007-2019 Brian Cherne

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*/

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/**

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

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* instead of firing the handlerIn function immediately, hoverIntent checks

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

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

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* called after a matching handlerIn.

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*

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

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* .hoverIntent( handlerIn, handlerOut )

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* .hoverIntent( handlerInOut )

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*

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

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* .hoverIntent( handlerIn, handlerOut, selector )

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* .hoverIntent( handlerInOut, selector )

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*

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* // using a basic configuration object

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* .hoverIntent( config )

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*

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* @param handlerIn function OR configuration object

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* @param handlerOut function OR selector for delegation OR undefined

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* @param selector selector OR undefined

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

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*/

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;(function(factory) {

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'use strict';

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if (typeof define === 'function' && define.amd) {

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define(['jquery'], factory);

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} else if (typeof module === 'object' && module.exports) {

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module.exports = factory(require('jquery'));

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} else if (jQuery && !jQuery.fn.hoverIntent) {

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factory(jQuery);

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}

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})(function($) {

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'use strict';

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// default configuration values

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var _cfg = {

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interval: 100,

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sensitivity: 6,

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timeout: 0

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};

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// counter used to generate an ID for each instance

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var INSTANCE_COUNT = 0;

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// current X and Y position of mouse, updated during mousemove tracking (shared across instances)

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var cX, cY;

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// saves the current pointer position coordinates based on the given mousemove event

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var track = function(ev) {

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cX = ev.pageX;

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cY = ev.pageY;

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};

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// compares current and previous mouse positions

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var compare = function(ev,$el,s,cfg) {

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// compare mouse positions to see if pointer has slowed enough to trigger `over` function

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

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$el.off(s.event,track);

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delete s.timeoutId;

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// set hoverIntent state as active for this element (permits `out` handler to trigger)

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s.isActive = true;

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// overwrite old mouseenter event coordinates with most recent pointer position

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ev.pageX = cX; ev.pageY = cY;

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// clear coordinate data from state object

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delete s.pX; delete s.pY;

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return cfg.over.apply($el[0],[ev]);

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} else {

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// set previous coordinates for next comparison

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s.pX = cX; s.pY = cY;

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

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s.timeoutId = setTimeout( function(){compare(ev, $el, s, cfg);} , cfg.interval );

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}

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};

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// triggers given `out` function at configured `timeout` after a mouseleave and clears state

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var delay = function(ev,$el,s,out) {

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var data = $el.data('hoverIntent');

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if (data) {

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delete data[s.id];

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}

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return out.apply($el[0],[ev]);

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};

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// checks if `value` is a function

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var isFunction = function(value) {

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return typeof value === 'function';

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};

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

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// instance ID, used as a key to store and retrieve state information on an element

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var instanceId = INSTANCE_COUNT++;

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// extend the default configuration and parse parameters

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var cfg = $.extend({}, _cfg);

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if ( $.isPlainObject(handlerIn) ) {

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cfg = $.extend(cfg, handlerIn);

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if ( !isFunction(cfg.out) ) {

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cfg.out = cfg.over;

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}

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} else if ( isFunction(handlerOut) ) {

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

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} else {

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

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}

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// A private function for handling mouse 'hovering'

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var handleHover = function(e) {

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// cloned event to pass to handlers (copy required for event object to be passed in IE)

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

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// the current target of the mouse event, wrapped in a jQuery object

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var $el = $(this);

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// read hoverIntent data from element (or initialize if not present)

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var hoverIntentData = $el.data('hoverIntent');

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if (!hoverIntentData) { $el.data('hoverIntent', (hoverIntentData = {})); }

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// read per-instance state from element (or initialize if not present)

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var state = hoverIntentData[instanceId];

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if (!state) { hoverIntentData[instanceId] = state = { id: instanceId }; }

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// state properties:

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// id = instance ID, used to clean up data

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// timeoutId = timeout ID, reused for tracking mouse position and delaying "out" handler

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// isActive = plugin state, true after `over` is called just until `out` is called

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// pX, pY = previously-measured pointer coordinates, updated at each polling interval

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// event = string representing the namespaced event used for mouse tracking

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// clear any existing timeout

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if (state.timeoutId) { state.timeoutId = clearTimeout(state.timeoutId); }

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// namespaced event used to register and unregister mousemove tracking

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var mousemove = state.event = 'mousemove.hoverIntent.hoverIntent'+instanceId;

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// handle the event, based on its type

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

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// do nothing if already active

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if (state.isActive) { return; }

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

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

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

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$el.off(mousemove,track).on(mousemove,track);

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

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state.timeoutId = setTimeout( function(){compare(ev,$el,state,cfg);} , cfg.interval );

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} else { // "mouseleave"

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// do nothing if not already active

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if (!state.isActive) { return; }

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// unbind expensive mousemove event

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$el.off(mousemove,track);

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

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state.timeoutId = setTimeout( function(){delay(ev,$el,state,cfg.out);} , cfg.timeout );

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}

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};

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// listen for mouseenter and mouseleave

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

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};

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});

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