// jcarousel lite modified by Bucky Flowers to include pause on mouseover, and external position indicators
(function(jQuery) {                                          // Compliant with jquery.noConflict()
jQuery.fn.jCarouselLite = function(o) {
    o = jQuery.extend({
        //btnPrev: null,
        //btnNext: null,
        mouseWheel: false,
        auto: null,
        speed: 200,
        easing: null,
        vertical: false,
        circular: true,
    navcontainer:null,
    sectionlinks:null,
        visible: 3,
        start: 0,
        scroll: 1,
    pauseOnHover: true,
        beforeStart: null,
        afterEnd: null
    }, o || {});

    return this.each(function() {                           // Returns the element collection. Chainable.

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

     var isMouseOver = false;


            // added: only perform if li > 1
            if(o.circular && tl > 1) {
                                ul.prepend(tLi.slice(tl-v-1+1).clone()).append(tLi.slice(0,v).clone());
                                o.start += v;
                        }



                        update_navigation(1);

        var li = jQuery(o.panel), 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);   // Full li size(incl margin)-Used for animation
        var ulSize = liSize * itemLength;                   // size of full ul(total length, not just for the visible items)
        var divSize = liSize * v;                           // size of entire div(total length for just the visible items)
    var nav = jQuery(o.navcontainer);

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

        div.css(sizeCss, divSize+"px");                     // Width of the DIV. length of visible images

    li.mouseover(function(){ isMouseOver = true; });
        li.mouseout(function(){ isMouseOver = false; });
    nav.mouseover(function(){ isMouseOver = true; });
        nav.mouseout(function(){ isMouseOver = false; });

        if(o.btnPrev)
            jQuery(o.btnPrev).click(function() {
                return go(curr-o.scroll);
            });

        if(o.btnNext)
            jQuery(o.btnNext).click(function() {
                return go(curr+o.scroll);
            });

        if(o.btnGo) {
            jQuery.each(o.btnGo, function(i, val) {
            jQuery(val).click(function() {
                return go(o.circular ? o.visible+i : i+1);
                });
              });
            }

        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() {
                                        if(o.pauseOnHover && isMouseOver) return;
                                        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 circular we are in first or last, then goto the other end
                    if(to<=o.start-v-1) {           // If first, then goto last
                        ul.css(animCss, -((itemLength-(v*2))*liSize)+"px");
                        // If "scroll" > 1, then the "to" might not be equal to the condition; it can be lesser depending on the number of elements.
                        curr = to==o.start-v-1 ? itemLength-(v*2)-1 : itemLength-(v*2)-o.scroll;
                    } else if(to>=itemLength-v+1) { // If last, then goto first
                        ul.css(animCss, -( (v) * liSize ) + "px" );
                        // If "scroll" > 1, then the "to" might not be equal to the condition; it can be greater depending on the number of elements.
                        curr = to==itemLength-v+1 ? v+1 : v+o.scroll;
                    } else curr = to;
                } else {                    // If non-circular and to points to first or last, we just return.
                    if(to<0 || to>itemLength-v) return;
                    else curr = to;
                }                           // If neither overrides it, the curr will still be "to" and we can proceed.

                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;
                    }


                );
        update_navigation((o.circular) ? 0+curr : 1+curr);
                // Disable buttons when the carousel reaches the last/first, and enable when not
                if(!o.circular) {
                    jQuery(o.btnPrev + "," + o.btnNext).removeClass("disabled");
                    jQuery( (curr-o.scroll<0 && o.btnPrev)
                        ||
                       (curr+o.scroll > itemLength-v && o.btnNext)
                        ||
                       []
                     ).addClass("disabled");
                }

            }
            return false;
        };


    function update_navigation(curr){
                                var kids = jQuery(o.panel);
                                var cloneVal = (o.circular) ? 2 : 0;
                                var pos = (kids.size()-cloneVal <= curr) ? (curr > kids.size()-cloneVal) ? 1 : kids.size()-cloneVal : curr;
                                pos = (pos == 0) ? kids.size()-cloneVal : pos;

                                var sectionLinks = jQuery(o.sectionlinks);



                                for(k = 0; k < sectionLinks.size(); k++){
                                        if(pos == k+1){
                                                jQuery(sectionLinks[k]).attr("class", 'selected');
                                        } else {
                                                jQuery(sectionLinks[k]).attr("class", 'off');
                                        }
                                }
                        };

    });
};

function css(el, prop) {
    return parseInt(jQuery.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);


jQuery.extend( jQuery.easing,
{
  easeInQuad: function (x, t, b, c, d) {
    return c*(t/=d)*t + b;
  },
  easeOutQuad: function (x, t, b, c, d) {
    return -c *(t/=d)*(t-2) + b;
  },
  easeInOutQuad: function (x, t, b, c, d) {
    if ((t/=d/2) < 1) return c/2*t*t + b;
    return -c/2 * ((--t)*(t-2) - 1) + b;
  }

});