/**
 * @classdescription 妯℃嫙marquee锛屾棤闂存柇婊氬姩鍐呭
 * @author lyc 淇敼
 * @dom
 *  	<div id="marquee">
 *  		<ul>
 *   			<li></li>
 *   			<li></li>
 *  		</ul>
 *  	</div>
 * @css
 *  	#marquee {overflow:hidden;width:200px;height:50px;}
 * @usage
 *  	$("#marquee").kxbdmarquee(options);
 * @options
 *		isequal:true,		//鎵€鏈夋粴鍔ㄧ殑鍏冪礌闀垮鏄惁鐩哥瓑,true,false
 *  	loop:0,				//寰幆婊氬姩娆℃暟锛?鏃舵棤闄?
 *		direction:"left",	//婊氬姩鏂瑰悜锛?left","right","up","down"
 *		scrollamount:1,		//姝ラ暱
 *		scrolldelay:20		//鏃堕暱
 */
(function($){
	$.fn.kxbdmarquee=function(options){
		var opts=$.extend({},$.fn.kxbdmarquee.defaults, options);

		return this.each(function(){
			var $marquee=$(this);				//婊氬姩鍏冪礌瀹瑰櫒
			var _scrollobj=$marquee.get(0);		//婊氬姩鍏冪礌瀹瑰櫒dom
			var scrollw=$marquee.width();		//婊氬姩鍏冪礌瀹瑰櫒鐨勫搴?
			var scrollh=$marquee.height();		//婊氬姩鍏冪礌瀹瑰櫒鐨勯珮搴?
			var $element=$marquee.children();	//婊氬姩鍏冪礌
			var $kids=$element.children();		//婊氬姩瀛愬厓绱?
			var scrollsize=0;					//婊氬姩鍏冪礌灏哄

			//婊氬姩绫诲瀷锛?宸﹀彸锛?涓婁笅
			var _type=(opts.direction=="left"||opts.direction=="right") ? 1:0;

			//闃叉婊氬姩瀛愬厓绱犳瘮婊氬姩鍏冪礌瀹借€屽彇涓嶅埌瀹為檯婊氬姩瀛愬厓绱犲搴?
			$element.css(_type?"width":"height",10000);

			//鑾峰彇婊氬姩鍏冪礌鐨勫昂瀵?
			if(opts.isequal){
				scrollsize=$kids[_type?"outerwidth":"outerheight"]()*$kids.length;
			}else{
				$kids.each(function(){
					scrollsize+=$(this)[_type?"outerwidth":"outerheight"]();
				});
			};

			//婊氬姩鍏冪礌鎬诲昂瀵稿皬浜庡鍣ㄥ昂瀵革紝涓嶆粴鍔?
			if(scrollsize<(_type?scrollw:scrollh)){return;}; 

			//鍏嬮殕婊氬姩瀛愬厓绱犲皢鍏舵彃鍏ュ埌婊氬姩鍏冪礌鍚庯紝骞惰瀹氭粴鍔ㄥ厓绱犲搴?
			$element.append($kids.clone()).css(_type?"width":"height",scrollsize*2);

			var nummoved=0;
			function scrollfunc(){
				var _dir=(opts.direction=="left"||opts.direction=="right") ? "scrollleft":"scrolltop";
				if (opts.loop>0) {
					nummoved+=opts.scrollamount;
					if(nummoved>scrollsize*opts.loop){
						_scrollobj[_dir]=0;
						return clearinterval(moveid);
					};
				};

				if(opts.direction=="left"||opts.direction=="up"){
					var newpos=_scrollobj[_dir]+opts.scrollamount;
					if(newpos>=scrollsize){
						newpos-=scrollsize;
					}
					_scrollobj[_dir]=newpos;
				}else{
					var newpos=_scrollobj[_dir]-opts.scrollamount;
					if(newpos<=0){
						newpos += scrollsize;
					};
					_scrollobj[_dir]=newpos;
				};
			};

			//婊氬姩寮€濮?
			var moveid=setinterval(scrollfunc, opts.scrolldelay);

			//榧犳爣鍒掕繃鍋滄婊氬姩
			$marquee.hover(function(){
				clearinterval(moveid);
			},function(){
				clearinterval(moveid);
				moveid=setinterval(scrollfunc, opts.scrolldelay);
			});
		});
	};

	$.fn.kxbdmarquee.defaults={
		isequal:true,		//鎵€鏈夋粴鍔ㄧ殑鍏冪礌闀垮鏄惁鐩哥瓑,true,false
		loop: 0,			//寰幆婊氬姩娆℃暟锛?鏃舵棤闄?
		direction: "left",	//婊氬姩鏂瑰悜锛?left","right","up","down"
		scrollamount:1,		//姝ラ暱
		scrolldelay:20		//鏃堕暱

	};

	$.fn.kxbdmarquee.setdefaults=function(settings) {
		$.extend( $.fn.kxbdmarquee.defaults, settings );
	};
})(jquery);