/** NOTE: PLEASE TRY TO USE "scrollable" PLUGIN.  ONLY USE THIS IF YOU NEED TO BE BACKWARD COMPATIBLE WITH jQuery 1.2.6 
    MODIFICATIONS WHERE MADE TO THIS PAGE (search "customized").  DO NOT UPGRADE JCAROUSELLITE. -Leslie
**/
/**
 * jCarouselLite - jQuery plugin to navigate images/any content in a carousel style widget.
 * @requires jQuery v1.2 or above
 *
 * http://gmarwaha.com/jquery/jcarousellite/
 *
 * Copyright (c) 2007 Ganeshji Marwaha (gmarwaha.com)
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 *
 * Version: 1.0.1
 * Note: Requires jquery 1.2 or above from version 1.0.1
 */



(function($) {                                          // Compliant with jquery.noConflict()
$.fn.jCarouselLite = function(o) {
    o = $.extend({
        btnPrev: null,
        btnNext: null,
        btnGo: null,
        mouseWheel: false,
        auto: null,
        hoverPause: false,

        speed: 200,
        easing: null,

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

        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 = $(this), ul = $("ul", div), tLi = $("li", ul), tl = tLi.size(), v = o.visible;

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

        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);   // 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)

//        li.css({width: li.width(), height: li.height()});
	li.css(sizeCss, liSize+"px");	// customized by Leslie to only set the dimension that matters

        ul.css(sizeCss, ulSize+"px").css(animCss, -(curr*liSize));

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

        if(o.btnPrev) {
            $(o.btnPrev).click(function() {
                return go(curr-o.scroll);
            });
            if(o.hoverPause) {
                $(o.btnPrev).hover(function(){stopAuto();}, function(){startAuto();});
            }
        }


        if(o.btnNext) {
            $(o.btnNext).click(function() {
                return go(curr+o.scroll);
            });
            if(o.hoverPause) {
               $(o.btnNext).hover(function(){stopAuto();}, function(){startAuto();});
           	}
            
        }

        if(o.btnGo)
            $.each(o.btnGo, function(i, val) {
                $(val).click(function() {
                    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);
            });

        var autoInterval;

        function startAuto() {
          stopAuto();
          autoInterval = setInterval(function() {
                  go(curr+o.scroll);
              }, o.auto+o.speed);
        };

        function stopAuto() {
            ul.stop(false, true);	// customized by Leslie to jump to final state when animation is stopped
            clearInterval(autoInterval);
        };

        if(o.auto) {
            if(o.hoverPause) {
                div.hover(function(){stopAuto();}, function(){startAuto();});
            }
            startAuto();
            this.startAuto = startAuto;	// customized by Leslie to have access to this function
            this.stopAuto = stopAuto;	// customized by Leslie to have access to this function
        };


        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<0) {           // If before range, then go around
                        ul.css(animCss, -( (curr + tl) * liSize)+"px");
                        curr = to + tl;
                    } else if(to>itemLength-v) { // If beyond range, then come around
                        ul.css(animCss, -( (curr - tl) * liSize ) + "px" );
                        curr = to - tl;
                    } 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;
                    }
                );
                // Disable buttons when the carousel reaches the last/first, and enable when not
                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);