jcarrucellite FIXED

jcarrucellite.js

(function($) {                                          
$.fn.jCarouselLite = function(o) {
    o = $.extend({
        btnPrev: null,
        btnNext: null,
        btnGo: null,
        mouseWheel: false,
        auto: null,

        speed: 200,
        easing: null,

        vertical: false,
        circular: true,
        visible: 3,
        start: 0,
        scroll: 1,
        flag:0,

        beforeStart: null,
        afterEnd: null
    }, o || {});

    return this.each(function() {                           

        var running = false, animCss=o.vertical?"top":"left", sizeCss=o.vertical?"height":"width";
        var div = $(this), ul = $("ul", div), tLi = $("li", ul), tl = tLi.size(), v = o.visible;
        var id = $(div).attr('id');

        if(o.circular) {
            ul.prepend(tLi.slice(tl-v-1+1).clone())
              .append(tLi.slice(0,v).clone());
            o.start += v;
        }

        var li = $("li", ul), itemLength = li.size(), curr = o.start;

        //FIX: remove exedents
        var tmp = itemLength % o.visible;
        if(tmp != 0){
          for(var count=0; count < tmp; count++){
            $(li[itemLength -1 -count]).remove();
          }
          var li = $("li", ul), itemLength = li.size(), curr = o.start;
        }

        div.css("visibility", "visible");

        li.css({overflow: "hidden", float: o.vertical ? "none" : "left"});
        ul.css({margin: "0", padding: "0", position: "relative", "list-style-type": "none", "z-index": "1"});
        div.css({overflow: "hidden", position: "relative", "z-index": "2", left: "0px"});

        var liSize = o.vertical ? height(li) : width(li);   
        var ulSize = liSize * itemLength;                   
        var divSize = liSize * v;                           

        li.css({width: li.width(), height : li.height()});
        ul.css(sizeCss, ulSize+"px").css(animCss, -(curr*liSize));

        div.css(sizeCss, divSize+"px");                     
        //FIXME
        //o.flag = o.visible -1;
        o.flag = o.start + o.visible - o.start % o.visible -1;

        if(o.btnGo){
          var get_btn = o.btnGo[o.start];
          if(typeof get_btn !== 'undefined')
            $(get_btn).addClass('active');
        }

        if(o.btnPrev){
            //hide prev FIXME:
            //$(o.btnPrev).hide();
            //TODO:test
           if(o.flag <= o.visible-1)
             $(o.btnPrev).hide();

            $(o.btnPrev).click(function() {
              $('#'+id).find('.step-slide').removeClass('active');
                o.flag -= o.scroll;
                if(o.flag < o.visible -1 || o.flag % o.scroll != 0 ){
                  //circular
                  //o.flag = itemLength-v-1 - 3;
                  //lineal
                  o.flag=o.visible -1;
                }

                if(o.btnGo){
                  $(o.btnGo).removeClass('active');
                  var get_btn = o.btnGo[o.flag];

                  if(typeof get_btn !== 'undefined')
                    $(get_btn).addClass('active');
                }

                if(o.flag <= o.visible-1)
                  $(o.btnPrev).hide();
                $(o.btnNext).show();
                return go(curr-o.scroll);
            });
        }

        if(o.btnNext){
            //TODO:test
            if(o.flag >= itemLength-o.scroll)
              $(o.btnNext).hide();

            $(o.btnNext).click(function() {
              $('#'+id).find('.step-slide').removeClass('active');

                o.flag += o.scroll;
                //circular
                //if(o.flag > itemLength-v-1-3){o.flag = 0;}
                //lineal
                if(o.flag > itemLength-o.scroll){
                  o.flag = itemLength-o.scroll;
                }

                if(o.btnGo){
                  $(o.btnGo).removeClass('active');
                  var get_btn = o.btnGo[o.flag];

                  if(typeof get_btn !== 'undefined')
                    $(get_btn).addClass('active');
                }

                if(o.flag >= itemLength-o.scroll)
                  $(o.btnNext).hide();
                $(o.btnPrev).show();
                return go(curr+o.scroll);
            });
        }

        if(o.btnGo)
            $.each(o.btnGo, function(i, val) {
                $(val).click(function() {
                  //fix ie
                  if(val === undefined)
                    return;

                  //mostramos los 2 botones
                  $(o.btnPrev).show();
                  $(o.btnNext).show();

                  //FIXME:
                  $(o.btnGo).removeClass('active');
                  $(this).addClass('active');

                    o.flag = o.circular ? o.visible+i : i;

                    if(o.flag >= itemLength-o.scroll)
                      $(o.btnNext).hide();
                    else if(o.flag <= 0)
                      $(o.btnPrev).hide();
                  return go(o.circular ? o.visible+i : i);
                });
            });

        if(o.mouseWheel && div.mousewheel)
            div.mousewheel(function(e, d) {
                return d>0 ? go(curr-o.scroll) : go(curr+o.scroll);
            });

        if(o.auto)
            setInterval(function() {
                go(curr+o.scroll);
            }, o.auto+o.speed);

        function vis() {
            return li.slice(curr).slice(0,v);
        };

        function go(to) {
            if(!running) {

                if(o.beforeStart)
                    o.beforeStart.call(this, vis());

                if(o.circular) {            
                    if(to<=o.start-v-1) {           
                      
                      
                        ul.css(animCss, -((itemLength-(v*2))*liSize)+"px");
                        
                        curr = to==o.start-v-1 ? itemLength-(v*2)-1 : itemLength-(v*2)-o.scroll;
                    } else if(to>=itemLength-v+1) { 
                        ul.css(animCss, -( (v) * liSize ) + "px" );
                        
                        curr = to==itemLength-v+1 ? v+1 : v+o.scroll;
                    } else curr = to;
                } else {                    
                    if(to<0 || to>itemLength-v) return;
                    else curr = to;
                }                           

                running = true;

                ul.animate(
                    animCss == "left" ? { left: -(curr*liSize) } : { top: -(curr*liSize) } , o.speed, o.easing,
                    function() {
                        if(o.afterEnd)
                            o.afterEnd.call(this, vis());
                        running = false;
                    }
                );
                
                if(!o.circular) {
                    $(o.btnPrev + "," + o.btnNext).removeClass("disabled");
                    $( (curr-o.scroll<0 && o.btnPrev)
                        ||
                       (curr+o.scroll > itemLength-v && o.btnNext)
                        ||
                       []
                     ).addClass("disabled");
                }

            }
            return false;
        };
    });
};

function css(el, prop) {
    return parseInt($.css(el[0], prop)) || 0;
};
function width(el) {
    return  el[0].offsetWidth + css(el, 'marginLeft') + css(el, 'marginRight');
};
function height(el) {
    return el[0].offsetHeight + css(el, 'marginTop') + css(el, 'marginBottom');
};

})(jQuery);