/**
*      <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'){
                    _scrollobj[_dir] +=opts.scrollamount;
                    if(_scrollobj[_dir]>=scrollsize){
                        _scrollobj[_dir] = 0;
                    }
                }else{
                    _scrollobj[_dir] -=opts.scrollamount;
                    if(_scrollobj[_dir]<=0){
                        _scrollobj[_dir] = scrollsize;
                    }
                }
            }
            //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);