/*!
 * jQuery UI Effects Pulsate 1.13.1
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 */

//>>label: Pulsate Effect
//>>group: Effects
//>>description: Pulsates an element n times by changing the opacity to zero and back.
//>>docs: http://api.jqueryui.com/pulsate-effect/
//>>demos: http://jqueryui.com/effect/

( function( factory ) {
"use strict";

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

// AMD. Register as an anonymous module.
define( [
"jquery",
"./effect"
], factory );
} else {

// Browser globals
factory( jQuery );
}
} )( function( $ ) {
"use strict";

return $.effects.define( "pulsate", "show", function( options, done ) {
var element = $( this ),
mode = options.mode,
show = mode === "show",
hide = mode === "hide",
showhide = show || hide,

// Showing or hiding leaves off the "last" animation
anims = ( ( options.times || 5 ) * 2 ) + ( showhide ? 1 : 0 ),
duration = options.duration / anims,
animateTo = 0,
i = 1,
queuelen = element.queue().length;

if ( show || !element.is( ":visible" ) ) {
element.css( "opacity", 0 ).show();
animateTo = 1;
}

// Anims - 1 opacity "toggles"
for ( ; i < anims; i++ ) {
element.animate( { opacity: animateTo }, duration, options.easing );
animateTo = 1 - animateTo;
}

element.animate( { opacity: animateTo }, duration, options.easing );

element.queue( done );

$.effects.unshift( element, queuelen, anims + 1 );
} );

} );