jquery-ui/ui/jquery.effects.bounce.js

/*
 * jQuery UI Effects Bounce @VERSION
 *
 * Copyright 2011, AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * http://jquery.org/license
 *
 * http://docs.jquery.com/UI/Effects/Bounce
 *
 * Depends:
 *	jquery.effects.core.js
 */
(function( $, undefined ) {

var rshowhide = /show|hide/;

$.effects.bounce = function(o) {

	return this.queue(function() {

		// Create element
		var el = $( this ), 
			props = [ 'position', 'top', 'bottom', 'left', 'right' ],
			// defaults:
			mode = $.effects.setMode( el, o.mode || 'effect' ),
			direction = o.direction || 'up', 
			distance = o.distance || 20,
			times = o.times || 5, 
			speed = (o.duration || 250),
			// utility:
			ref = ( direction == 'up' || direction == 'down' ) ? 'top' : 'left',
			motion = ( direction == 'up' || direction == 'left' ), // true is positive
			i, animation, animation1, animation2;
		
		// Avoid touching opacity to prevent clearType and PNG issues in IE	
		if ( rshowhide.test( mode ) ) {
			props.push( 'opacity' );
		} 

		$.effects.save( el, props ); 
		el.show(); 
		$.effects.createWrapper( el ); // Create Wrapper

		if ( !distance ) {
			distance = el[ ref == 'top' ? 'outerHeight' : 'outerWidth' ]({ margin:true }) / 3;
		}
		if ( mode == 'show' ) el.css( 'opacity', 0 ).css( ref, motion ? -distance : distance ); // Shift
		if ( mode == 'hide' ) distance = distance / (times * 2);
		if ( mode != 'hide' ) times--;

		// Animate
		if ( mode == 'show' ) { 
			animation = { 
				opacity: 1 
			};
			animation[ ref ] = ( motion ? '+=' : '-=' ) + distance;
			el.animate( animation, speed / 2, o.easing);
			distance = distance / 2;
			times--;
		};

		// Bounces
		for (i = 0; i < times; i++) {
			animation1 = {};
			animation2 = {};
			animation1[ ref ] = ( motion ? '-=' : '+=' ) + distance;
			animation2[ ref ] = ( motion ? '+=' : '-=' ) + distance;
			el.animate( animation1, speed / 2, o.easing ).animate( animation2, speed / 2, o.easing );
			distance = ( mode == 'hide' ) ? distance * 2 : distance / 2;
		}

		// Last Bounce
		if ( mode == 'hide' ) {
			animation = {
				opacity: 0
			};
			animation[ ref ] = ( motion ? '-=' : '+=' ) + distance;
			el.animate( animation, speed / 2, o.easing, function(){
				el.hide();
				$.effects.restore( el, props );
				$.effects.removeWrapper( el );
				$.isFunction( o.complete ) && o.complete.apply( this, arguments );
			});
		} else {
			animation1 = {};
			animation2 = {};
			animation1[ ref ] = ( motion ? '-=' : '+=' ) + distance;
			animation2[ ref ] = ( motion ? '+=' : '-=' ) + distance;
			el
				.animate( animation1, speed / 2, o.easing )
				.animate( animation2, speed / 2, o.easing, function() {
					$.effects.restore( el, props );
					$.effects.removeWrapper( el );
					$.isFunction( o.complete ) && o.complete.apply( this, arguments );
				});
		}
		el.dequeue();
	});

};

})(jQuery);