'use strict';

var Events = require('../../lib/events');

var throttle = require('../../lib/throttle');

var getGraphDiv = require('../../lib/dom').getGraphDiv;

var hoverConstants = require('../fx/constants');

var unhover = module.exports = {};

unhover.wrapped = function(gd, evt, subplot) {

gd = getGraphDiv(gd);

// Important, clear any queued hovers

if(gd._fullLayout) {

throttle.clear(gd._fullLayout._uid + hoverConstants.HOVERID);

}

const oldhoverdata = gd._hoverdata;

const shouldEmitUnhover = unhover.raw(gd, evt, subplot);

// Special handling for `hoveranywhere`, to ensure we emit exactly one unhover event

// when the cursor leaves the plot area.

// gd._hoverAnywhereActive is set in fx/hover.js when we emit an empty-space hover event.

if(shouldEmitUnhover && gd._hoverAnywhereActive) {

gd._hoverAnywhereActive = false;

// Make sure hoveranywhere is still enabled

if(gd._fullLayout?.hoveranywhere && evt?.target && !oldhoverdata) {

gd.emit('plotly_unhover', {

event: evt,

points: []

});

}

}

};

// remove hover effects on mouse out, and emit unhover event

// returns false if unhover was skipped due to the plotly_beforehover handler returning false;

// returns true otherwise

unhover.raw = function raw(gd, evt) {

var fullLayout = gd._fullLayout;

var oldhoverdata = gd._hoverdata;

if(!evt) evt = {};

if(evt.target && !gd._dragged &&

Events.triggerHandler(gd, 'plotly_beforehover', evt) === false) {

return false;

}

fullLayout._hoverlayer.selectAll('g').remove();

fullLayout._hoverlayer.selectAll('line').remove();

fullLayout._hoverlayer.selectAll('circle').remove();

gd._hoverdata = undefined;

if(evt.target && oldhoverdata) {

gd.emit('plotly_unhover', {

event: evt,

points: oldhoverdata

});

}

return true;

};