//Featured Content Glider: By http://www.dynamicdrive.com
//Created: Dec 22nd, 07'
//Updated (Jan 29th, 08): Added four possible slide directions: "updown", "downup", "leftright", or "rightleft"
//Updated (Feb 1st, 08): Changed glide behavior to reverse direction when previous button is clicked
//Updated (Feb 12th, 08): Added ability to retrieve gliding contents from an external file using Ajax ("remotecontent" variable added to configuration)
//Updated (July 21st, 09): Updated to work in jQuery 1.3.x
//Updated (Dec 13th, 09): Added keyboard navigation, so left/ right arrow keys now move glider. Fixed bug with auto rotation when "next" link isn't defined.

jQuery.noConflict()

var featuredcontentglider={
    leftrightkeys: [], //keycodes to move glider back and forth 1 slide, respectively. Enter [] to disable feature.
    csszindex: 100,
    ajaxloadingmsg: '<b>Fetching Content. Please wait...</b>',

    glide:function(config, showpage, isprev){
        var selected=parseInt(showpage)
        if (selected>=config.$contentdivs.length){ //if no content exists at this index position
            alert("No content exists at page "+(selected+1)+"! Loading 1st page instead.")
            selected=0
        }
        var $target=config.$contentdivs.eq(selected)
        //Test for toggler not being initialized yet, or user clicks on the currently selected page):
        if (config.$togglerdiv.attr('lastselected')==null || parseInt(config.$togglerdiv.attr('lastselected'))!=selected){
            var $selectedlink=config.$toc.eq(selected)
            config.nextslideindex=(selected<config.$contentdivs.length-1)? selected+1 : 0
            config.prevslideindex=(selected==0)? config.$contentdivs.length-1 : selected-1
            config.$next.attr('loadpage', config.nextslideindex+"pg") //store slide index to go to when "next" link is clicked on
            config.$prev.attr('loadpage', config.prevslideindex+'pg')
            var startpoint=(isprev=="previous")? -config.startpoint : config.startpoint
            $target.css(config.leftortop, startpoint).css("zIndex", this.csszindex++) //hide content so it's just out of view before animating it
            var endpoint=(config.leftortop=="left")? {left:0} : {top:0} //animate it into view
            $target.animate(endpoint, config.speed)
            config.$toc.removeClass('selected')
            $selectedlink.addClass('selected')
            config.$togglerdiv.attr('lastselected', selected+'pg')
        }
    },

    getremotecontent:function($, config){
        config.$glider.html(this.ajaxloadingmsg)
        $.ajax({
            url: config.remotecontent,
            error:function(ajaxrequest){
                config.$glider.html('Error fetching content.<br />Server Response: '+ajaxrequest.responseText)
            },
            success:function(content){
                config.$glider.html(content)
                featuredcontentglider.setuptoggler($, config)
            }
        })
    },

    aligncontents:function($, config){
        config.$contentdivs=$("#"+config.gliderid+" ."+config.contentclass)
        config.$contentdivs.css(config.leftortop, config.startpoint).css({height: config.$glider.height(), visibility: 'visible'}) //position content divs so they're out of view:
    },

    setuptoggler:function($, config){
        this.aligncontents($, config)
        config.$togglerdiv.hide()
        config.$toc.each(function(index){
                $(this).attr('pagenumber', index+'pg')
                if (index > (config.$contentdivs.length-1))
                    $(this).css({display: 'none'}) //hide redundant "toc" links
        })
        var $nextandprev=$("#"+config.togglerid+" .next, #"+config.togglerid+" .prev")
        $nextandprev.click(function(event){ //Assign click behavior to 'next' and 'prev' links
            featuredcontentglider.glide(config, this.getAttribute('loadpage'), this.getAttribute('buttontype'))
            event.preventDefault() //cancel default link action
        })
        config.$toc.click(function(event){ //Assign click behavior to 'toc' links
            featuredcontentglider.glide(config, this.getAttribute('pagenumber'))
            event.preventDefault()
        })
        config.$togglerdiv.fadeIn(1000, function(){
            featuredcontentglider.glide(config, config.selected)
            if (config.autorotate==true){ //auto rotate contents?
                config.stepcount=0 //set steps taken
                config.totalsteps=config.$contentdivs.length*config.autorotateconfig[1] //Total steps limit: num of contents x num of user specified cycles)
                featuredcontentglider.autorotate(config)
            }
        })
        config.$togglerdiv.click(function(){
            featuredcontentglider.cancelautorotate(config.togglerid)
        })
        if (this.leftrightkeys.length==2){
            $(document).bind('keydown', function(e){
                featuredcontentglider.keyboardnav(config, e.keyCode)
            })
        }
    },

    autorotate:function(config){
        var rotatespeed=config.speed+config.autorotateconfig[0]
        window[config.togglerid+"timer"]=setInterval(function(){
            if (config.totalsteps>0 && config.stepcount>=config.totalsteps){
                clearInterval(window[config.togglerid+"timer"])
            }
            else{
                featuredcontentglider.glide(config, config.nextslideindex, "next")
                config.stepcount++
            }
        }, rotatespeed)
    },

    cancelautorotate:function(togglerid){
        if (window[togglerid+"timer"])
            clearInterval(window[togglerid+"timer"])
    },

    keyboardnav:function(config, keycode){
        if (keycode==this.leftrightkeys[0])
            featuredcontentglider.glide(config, config.prevslideindex, "previous")
        else if (keycode==this.leftrightkeys[1])
            featuredcontentglider.glide(config, config.nextslideindex, "next")
        if (keycode==this.leftrightkeys[0] || keycode==this.leftrightkeys[1])
            featuredcontentglider.cancelautorotate(config.togglerid)
    },

    getCookie:function(Name){
        var re=new RegExp(Name+"=[^;]+", "i") //construct RE to search for target name/value pair
        if (document.cookie.match(re)) //if cookie found
            return document.cookie.match(re)[0].split("=")[1] //return its value
        return null
    },

    setCookie:function(name, value){
        document.cookie = name+"="+value
    },

    init:function(config){
        jQuery(document).ready(function($){
            config.$glider=$("#"+config.gliderid)
            config.$togglerdiv=$("#"+config.togglerid)
            config.$toc=config.$togglerdiv.find('.toc')
            config.$next=config.$togglerdiv.find('.next')
            config.$prev=config.$togglerdiv.find('.prev')
            config.$prev.attr('buttontype', 'previous')
            var selected=(config.persiststate)? featuredcontentglider.getCookie(config.gliderid) : config.selected
            config.selected=(isNaN(parseInt(selected))) ? config.selected : selected //test for cookie value containing null (1st page load) or "undefined" string    
            config.leftortop=(/up/i.test(config.direction))? "top" : "left" //set which CSS property to manipulate based on "direction"
            config.heightorwidth=(/up/i.test(config.direction))? config.$glider.height() : config.$glider.width() //Get glider height or width based on "direction"
            config.startpoint=(/^(left|up)/i.test(config.direction))? -config.heightorwidth : config.heightorwidth //set initial position of contents based on "direction"
            if (typeof config.remotecontent!="undefined" && config.remotecontent.length>0)
                featuredcontentglider.getremotecontent($, config)
            else
                featuredcontentglider.setuptoggler($, config)
            $(window).bind('unload', function(){ //clean up and persist
                config.$togglerdiv.unbind('click')
                config.$toc.unbind('click')
                config.$next.unbind('click')
                config.$prev.unbind('click')
                if (config.persiststate)
                    featuredcontentglider.setCookie(config.gliderid, config.$togglerdiv.attr('lastselected'))
                config=null
                
            })
        })
    }
}