/*
 * yuga.js 0.5.3
 */
(function($) {

	$(function() {
/*		$.yuga.selflink({
			hoverClass:'btn'
		});
*/		$.yuga.rollover({
			hoverClass: '.btn',
			groupClass: '.btngroup',
			postfix: '_on'
		});
/*		$.yuga.externalLink({
			windowOpen: true,
			externalClass: 'externalLink'
		});
		$.yuga.thickbox();
*/		$.yuga.stripe({
			oddClass:'odd',	
			evenClass:'even'
		});
//		$.yuga.css3class();
		$('a[href^=#], area[href^=#]').setYugaScroll();
	});

	//---------------------------------------------------------------------

	$.yuga = {
		Uri: function(s){
			this.originalPath = s;
			this.getAbsolutePath = function(path){
				var e = document.createElement('span');
				e.innerHTML = '<a href="' + path + '" />';
				return e.firstChild.href;
				path = new Image();
				return path;
			};
			this.absolutePath = this.getAbsolutePath(s);
			this.isSelfLink = (this.absolutePath == location.href);
			var fields = {'schema' : 2, 'username' : 5, 'password' : 6, 'host' : 7, 'path' : 9, 'query' : 10, 'fragment' : 11};
			var r = /^((\w+):)?(\/\/)?((\w+):?(\w+)?@)?([^\/\?:]+):?(\d+)?(\/?[^\?#]+)?\??([^#]+)?#?(\w*)/.exec(this.absolutePath);
			for (var field in fields) {
				this[field] = r[fields[field]]; 
			}
		},
		selflink: function (options) {
			var c = $.extend({
				hoverClass:'btn'
			}, options);
			$('a[href]').each(function(){
				var href = new $.yuga.Uri(this.getAttribute('href'));
				if (href.isSelfLink && !href.fragment) {
					$(this).addClass('current');
					$(this).find('img').each(function(){
						$(this).removeClass(c.hoverClass);
						this.originalSrc = $(this).attr('src');
						this.currentSrc = this.getAttribute('src').replace(/(\.gif|\.jpg|\.png)/, "_cr$1");
						$(this).attr('src',this.currentSrc);
					});
				}
			});
		},
		rollover: function(options) {
			var c = $.extend({
				hoverClass: '.roll',
				groupClass: '.rollgroup',
				postfix: '_on'
			}, options);
			$(c.hoverClass).each(function(){
				this.originalSrc = $(this).attr('src');
				this.rolloverSrc = this.originalSrc.replace(/(\.gif|\.jpg|\.png)$/, c.postfix+"$1");
				this.rolloverImg = new Image;
				this.rolloverImg.src = this.rolloverSrc;
			});
			$(c.hoverClass).not($(c.groupClass+' '+c.hoverClass)).hover(function(){
				$(this).attr('src',this.rolloverSrc);
			},function(){
				$(this).attr('src',this.originalSrc);
			});
			$(c.groupClass).hover(function(){
				$(this).find(c.hoverClass).each(function(){
					$(this).attr('src',this.rolloverSrc);
				});
			},function(){
				$(this).find(c.hoverClass).each(function(){
					$(this).attr('src',this.originalSrc);
				});
			});
		},
		externalLink: function(options) {
			var c = $.extend({
				windowOpen:true,
				externalClass: 'externalLink'
			}, options);
			var e = $('a[href^="http://"]');
			if (c.windowOpen) {
				e.click(function(){
					window.open(this.href, '_blank');
					return false;
				});
			}
			e.addClass(c.externalClass);
		},
		scroll: (function() {
			var c;
			var TimerId;
			var stepCount = 0;
			var lastY = -1;
			var ms;
			function move() {
				var currentX = getCurrentX();
				var currentY = getCurrentY();
				if (stepCount >= c.step) {
					window.scrollTo(currentX, c.endY);
				} else if (lastY == currentY) {
					stepCount++;
					window.scrollTo(currentX, getEasingY());
					lastY = getEasingY();
					TimerId = setTimeout(move, ms); 
				}
			};
			function getCurrentY() {
				return document.body.scrollTop  || document.documentElement.scrollTop;
			}
			function getCurrentX() {
				return document.body.scrollLeft  || document.documentElement.scrollLeft;
			}
			function getEasingY() {
				return Math.floor(getEasing(c.startY, c.endY, stepCount, c.step, c.easing));
			}
			function getEasing(start, end, stepCount, step, easing) {
				var s = stepCount/step;
				return (end-start)*(s+easing/(100*Math.PI)*Math.sin(Math.PI*s))+start;
			}
			return {
				set: function(options) {
					clearTimeout(TimerId);
					stepCount = 0;
					c = $.extend({
						startY:getCurrentY(),
						endY:0,
						easing:100,
						step:30,
						fps:60
					}, options);
					lastY = c.startY;
					ms = Math.floor(1000/c.fps);
					TimerId = setTimeout(move, ms); 
				}
			};
		})(),
		thickbox: function() {
			try {
				tb_init('a[@href$=".jpg"], a[@href$=".gif"], a[@href$=".png"]');
			} catch(e) {
			}	
		},
		stripe: function(options) {
			var c = $.extend({
				oddClass:'odd',
				evenClass:'even'
			}, options);
			$('ul, ol').each(function(){
				$(this).children('li:odd').addClass(c.evenClass);
				$(this).children('li:even').addClass(c.oddClass);
			});
			$('table').each(function(){
				$(this).children('tr:odd').addClass(c.evenClass);
				$(this).children('tr:even').addClass(c.oddClass);
			});
		},
		css3class: function() {
			$('body :first-child').addClass('firstChild');
			$('body :last-child').addClass('lastChild');
			$('body :empty').addClass('empty');
		}
	};
	$.fn.setYugaScroll = function() {
		return this.each(function(){
			$(this).each(function(){
				this.hrefdata = new $.yuga.Uri(this.getAttribute('href'));
			}).click(function(){
				var target = $('#'+this.hrefdata.fragment);
				if (target.length) {
					$.yuga.scroll.set({
						endY: target.offset().top
					});
					return false;
				}
			});
		});
	};

})(jQuery);