/*!

 * 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 ) {

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

		// AMD. Register as an anonymous module.

		define( [

			"jquery",

			"./effect"

		], factory );

	} else {

		// Browser globals

		factory( jQuery );

	}

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 );

} );