/**
 * @classdescription 妯℃嫙marquee锛屾棤闂存柇婊氬姩鍐呭
 * @author aken li(www.kxbd.com)
 * @dom
 *  	<div id="marquee">
 *  		<ul>
 *   			<li></li>
 *   			<li></li>
 *  		</ul>
 *  	</div>
 * @css
 *  	#marquee {width:200px;height:50px;overflow:hidden;}
 * @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
			var _type = (opts.direction == 'left' || opts.direction == 'right') ? 1:0;//婊氬姩绫诲瀷锛?宸﹀彸锛?涓婁笅
			
			//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);