/*
* jQuery Cycle Lite Plugin
* http://malsup.com/jquery/cycle/lite/
* Copyright (c) 2008 M. Alsup
* Version: 1.0 (06/08/2008)
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
* Requires: jQuery v1.2.3 or later
*/
; (function($) {

	var ver = 'Lite-1.0';

	$.fn.cycle = function(options) {
		return this.each(function() {
			options = options || {};

			if (this.cycleTimeout) clearTimeout(this.cycleTimeout);
			this.cycleTimeout = 0;
			this.cyclePause = 0;

			var $cont = $(this);
			var $slides = options.slideExpr ? $(options.slideExpr, this) : $cont.children();
			var els = $slides.get();
			if (els.length < 2) {
				if (window.console && window.console.log)
					window.console.log('terminating; too few slides: ' + els.length);
				return; // don't bother
			}

			// support metadata plugin (v1.0 and v2.0)
			var opts = $.extend({}, $.fn.cycle.defaults, options || {}, $.metadata ? $cont.metadata() : $.meta ? $cont.data() : {});

			opts.before = opts.before ? [opts.before] : [];
			opts.after = opts.after ? [opts.after] : [];
			opts.after.unshift(function() { opts.busy = 0; });

			// allow shorthand overrides of width, height and timeout
			var cls = this.className;
			opts.width = parseInt((cls.match(/w:(\d+)/) || [])[1]) || opts.width;
			opts.height = parseInt((cls.match(/h:(\d+)/) || [])[1]) || opts.height;
			opts.timeout = parseInt((cls.match(/t:(\d+)/) || [])[1]) || opts.timeout;

			if ($cont.css('position') == 'static')
				$cont.css('position', 'relative');
			if (opts.width)
				$cont.width(opts.width);
			if (opts.height && opts.height != 'auto')
				$cont.height(opts.height);

			var first = 0;
			$slides.css({ position: 'absolute', top: 0, left: 0 }).hide().each(function(i) {
				$(this).css('z-index', els.length - i)
			});

			$(els[first]).css('opacity', 1).show(); // opacity bit needed to handle reinit case
			if ($.browser.msie) els[first].style.removeAttribute('filter');

			if (opts.fit && opts.width)
				$slides.width(opts.width);
			if (opts.fit && opts.height && opts.height != 'auto')
				$slides.height(opts.height);
			if (opts.pause)
				$cont.hover(function() { this.cyclePause = 1; }, function() { this.cyclePause = 0; });

			$.fn.cycle.transitions.fade($cont, $slides, opts);

			$slides.each(function() {
				var $el = $(this);
				this.cycleH = (opts.fit && opts.height) ? opts.height : $el.height();
				this.cycleW = (opts.fit && opts.width) ? opts.width : $el.width();
			});

			$slides.not(':eq(' + first + ')').css({ opacity: 0 });
			if (opts.cssFirst)
				$($slides[first]).css(opts.cssFirst);

			if (opts.timeout) {
				// ensure that timeout and speed settings are sane
				if (opts.speed.constructor == String)
					opts.speed = { slow: 600, fast: 200}[opts.speed] || 400;
				if (!opts.sync)
					opts.speed = opts.speed / 2;
				while ((opts.timeout - opts.speed) < 250)
					opts.timeout += opts.speed;
			}
			opts.speedIn = opts.speed;
			opts.speedOut = opts.speed;

			opts.slideCount = els.length;
			opts.currSlide = first;
			opts.nextSlide = 1;

			// fire artificial events
			var e0 = $slides[first];
			if (opts.before.length)
				opts.before[0].apply(e0, [e0, e0, opts, true]);
			if (opts.after.length > 1)
				opts.after[1].apply(e0, [e0, e0, opts, true]);

			if (opts.click && !opts.next)
				opts.next = opts.click;
			if (opts.next)
				$(opts.next).bind('click', function() { return advance(els, opts, opts.rev ? -1 : 1) });
			if (opts.prev)
				$(opts.prev).bind('click', function() { return advance(els, opts, opts.rev ? 1 : -1) });

			if (opts.timeout)
				this.cycleTimeout = setTimeout(function() {
					go(els, opts, 0, !opts.rev)
				}, opts.timeout + (opts.delay || 0));
		});
	};

	function go(els, opts, manual, fwd) {
		if (opts.busy) return;
		var p = els[0].parentNode, curr = els[opts.currSlide], next = els[opts.nextSlide];
		if (p.cycleTimeout === 0 && !manual)
			return;

		if (manual || !p.cyclePause) {
			if (opts.before.length)
				$.each(opts.before, function(i, o) { o.apply(next, [curr, next, opts, fwd]); });
			var after = function() {
				if ($.browser.msie)
					this.style.removeAttribute('filter');
				$.each(opts.after, function(i, o) { o.apply(next, [curr, next, opts, fwd]); });
			};

			if (opts.nextSlide != opts.currSlide) {
				opts.busy = 1;
				$.fn.cycle.custom(curr, next, opts, after);
			}
			var roll = (opts.nextSlide + 1) == els.length;
			opts.nextSlide = roll ? 0 : opts.nextSlide + 1;
			opts.currSlide = roll ? els.length - 1 : opts.nextSlide - 1;
		}
		if (opts.timeout)
			p.cycleTimeout = setTimeout(function() { go(els, opts, 0, !opts.rev) }, opts.timeout);
	};

	// advance slide forward or back
	function advance(els, opts, val) {
		var p = els[0].parentNode, timeout = p.cycleTimeout;
		if (timeout) {
			clearTimeout(timeout);
			p.cycleTimeout = 0;
		}
		opts.nextSlide = opts.currSlide + val;
		if (opts.nextSlide < 0) {
			opts.nextSlide = els.length - 1;
		}
		else if (opts.nextSlide >= els.length) {
			opts.nextSlide = 0;
		}
		go(els, opts, 1, val >= 0);
		return false;
	};

	$.fn.cycle.custom = function(curr, next, opts, cb) {
		var $l = $(curr), $n = $(next);
		$n.css({ opacity: 0 });
		var fn = function() { $n.animate({ opacity: 1 }, opts.speedIn, opts.easeIn, cb) };
		$l.animate({ opacity: 0 }, opts.speedOut, opts.easeOut, function() {
			$l.css({ display: 'none' });
			if (!opts.sync) fn();
		});
		if (opts.sync) fn();
	};

	$.fn.cycle.transitions = {
		fade: function($cont, $slides, opts) {
			$slides.not(':eq(0)').css('opacity', 0);
			opts.before.push(function() { $(this).show() });
		}
	};

	$.fn.cycle.ver = function() { return ver; };

	// @see: http://malsup.com/jquery/cycle/lite/
	$.fn.cycle.defaults = {
		timeout: 4000,
		speed: 1000,
		next: null,
		prev: null,
		before: null,
		after: null,
		height: 'auto',
		sync: 1,
		fit: 0,
		pause: 0,
		delay: 0,
		slideExpr: null
	};

})(jQuery);