/**
* @classDescription 模拟Marquee，无间断滚动内容
* @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
*      $('#marquee').kxbdMarquee(options);
* @options
*    isEqual:true,//所有滚动的元素长宽是否相等,true,false
*    loop: 0,//循环滚动次数，0时无限
*    direction: 'left',//滚动方向，'left','right','up','down'
*    scrollAmount:1,//步长
*    scrollDelay:20//时长
*/
(function($) {
    $.fn.kxbdMarquee = function(options) {
        var opts = $.extend({},
        $.fn.kxbdMarquee.defaults, options);
        return this.each(function() {
            var $marquee = $(this);
            var _scrollObj = $marquee.get(0);
            var scrollW = $marquee.width();
            var scrollH = $marquee.height();
            var $element = $marquee.children();
            var $kids = $element.children();
            var scrollSize = 0;
            var _type = (opts.direction == 'left' || opts.direction == 'right') ? 1 : 0;
            $element.css(_type ? 'width': 'height', 10000);
            if (opts.isEqual) {
                scrollSize = $kids[_type ? 'outerWidth': 'outerHeight']() * $kids.length;
            } else {
                $kids.each(function() {
                    scrollSize += $(this)[_type ? 'outerWidth': 'outerHeight']();
                });
            }
            if (scrollSize < (_type ? scrollW: scrollH)) return;
            $element.append($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;
                    }
                }
            }
            var moveId = setInterval(scrollFunc, opts.scrollDelay);
            $marquee.hover(function() {
                clearInterval(moveId);
            },
            function() {
                clearInterval(moveId);
                moveId = setInterval(scrollFunc, opts.scrollDelay);
            });
        });
    };
    $.fn.kxbdMarquee.defaults = {
        isEqual: true,
        loop: 0,
        direction: 'left',
        scrollAmount: 1,
        scrollDelay: 20
    };
    $.fn.kxbdMarquee.setDefaults = function(settings) {
        $.extend($.fn.kxbdMarquee.defaults, settings);
    };
})(jQuery);
(function($) {
    $.fn.kxbdMarquee = function(options) {
        var opts = $.extend({},
        $.fn.kxbdMarquee.defaults, options);
        return this.each(function() {
            var $marquee = $(this);
            var _scrollObj = $marquee.get(0);
            var scrollW = $marquee.width();
            var scrollH = $marquee.height();
            var $element = $marquee.children();
            var $kids = $element.children();
            var scrollSize = 0;
            var _type = (opts.direction == 'left' || opts.direction == 'right') ? 1 : 0;
            $element.css(_type ? 'width': 'height', 10000);
            if (opts.isEqual) {
                scrollSize = $kids[_type ? 'outerWidth': 'outerHeight']() * $kids.length;
            } else {
                $kids.each(function() {
                    scrollSize += $(this)[_type ? 'outerWidth': 'outerHeight']();
                });
            }
            if (scrollSize < (_type ? scrollW: scrollH)) return;
            $element.append($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;
                    }
                }
            }
            var moveId = setInterval(scrollFunc, opts.scrollDelay);
            $marquee.hover(function() {
                clearInterval(moveId);
            },
            function() {
                clearInterval(moveId);
                moveId = setInterval(scrollFunc, opts.scrollDelay);
            });
        });
    };
    $.fn.kxbdMarquee.defaults = {
        isEqual: true,
        loop: 0,
        direction: 'left',
        scrollAmount: 1,
        scrollDelay: 20
    };
    $.fn.kxbdMarquee.setDefaults = function(settings) {
        $.extend($.fn.kxbdMarquee.defaults, settings);
    };
})(jQuery);