Ticket #3914: effects.scrollview.js.txt

/*
 * jQuery UI Effects Scrollview
 *
 * Copyright (c) 2009 Philipp Simon (psimon@solotics.com)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * Depends:
 *  effects.core.js
 *
 */
;(function($) {

$.effects.scrollview = function(o) {
	return this.queue(function() {

		// Create element
		var el = $(this);

		// Set options
		$.effects.setMode(el, 'show');
		var offset = o.options.offset || 10;

		var vpTop = $(window).scrollTop();
		var lyTop = el.offset().top;

		if(lyTop - offset < vpTop) {
			scrollTo(lyTop - offset);
		} else {
			var vpHeight = self.innerHeight || $(window).height();
			var lyHeight = el.height();

			if (lyTop + lyHeight + offset > vpTop + vpHeight) {
				if (lyHeight > vpHeight) {
					scrollTo(lyTop - offset);
				} else {
					scrollTo(lyTop + lyHeight + offset - vpHeight);
				}
			} else {
				if(o.callback) o.callback.apply(el.get(0));
				el.dequeue();
			}
		}

		function scrollTo(y) {
			var animation = {'scrollTop': y};
			$($.browser.safari ? 'body' : 'html').animate(animation, {queue: false, duration: o.duration, easing: o.options.easing, complete: function() {
				if(o.callback) o.callback.apply(el.get(0), arguments);
				el.dequeue();
			}});
		};
	});

};

})(jQuery);