//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.

var featuredcontentglider={
  leftrightkeys: [37, 39], //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.CScontentdivs.length){ //if no content exists at this index position
      alert("No content exists at page "+(selected+1)+"! Loading 1st page instead.")
      selected=0
    }
    var CStarget=config.CScontentdivs.eq(selected)
    //Test for toggler not being initialized yet, or user clicks on the currently selected page):
    if (config.CStogglerdiv.attr('lastselected')==null || parseInt(config.CStogglerdiv.attr('lastselected'))!=selected){
      var CSselectedlink=config.CStoc.eq(selected)
      config.nextslideindex=(selected<config.CScontentdivs.length-1)? selected+1 : 0
      config.prevslideindex=(selected==0)? config.CScontentdivs.length-1 : selected-1
      config.CSnext.attr('loadpage', config.nextslideindex+"pg") //store slide index to go to when "next" link is clicked on
      config.CSprev.attr('loadpage', config.prevslideindex+'pg')
      var startpoint=(isprev=="previous")? -config.startpoint : config.startpoint
      CStarget.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
      CStarget.animate(endpoint, config.speed)
      config.CStoc.removeClass('selected')
      CSselectedlink.addClass('selected')
      config.CStogglerdiv.attr('lastselected', selected+'pg')
    }
  },

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

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

  setuptoggler:function(CS, config){
    this.aligncontents(CS, config)
    config.CStogglerdiv.hide()
    config.CStoc.each(function(index){
        CS(this).attr('pagenumber', index+'pg')
        if (index > (config.CScontentdivs.length-1))
          CS(this).css({display: 'none'}) //hide redundant "toc" links
    })
    var CSnextandprev=CS("#"+config.togglerid+" .next, #"+config.togglerid+" .prev")
    CSnextandprev.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.CStoc.click(function(event){ //Assign click behavior to 'toc' links
      featuredcontentglider.glide(config, this.getAttribute('pagenumber'))
      event.preventDefault()
    })
    config.CStogglerdiv.fadeIn(1000, function(){
      featuredcontentglider.glide(config, config.selected)
      if (config.autorotate==true){ //auto rotate contents?
        config.stepcount=0 //set steps taken
        config.totalsteps=config.CScontentdivs.length*config.autorotateconfig[1] //Total steps limit: num of contents x num of user specified cycles)
        featuredcontentglider.autorotate(config)
      }
    })
    config.CStogglerdiv.click(function(){
      featuredcontentglider.cancelautorotate(config.togglerid)
    })
    if (this.leftrightkeys.length==2){
      CS(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($){
      config.CSglider=$("#"+config.gliderid)
      config.CStogglerdiv=$("#"+config.togglerid)
      config.CStoc=config.CStogglerdiv.find('.toc')
      config.CSnext=config.CStogglerdiv.find('.next')
      config.CSprev=config.CStogglerdiv.find('.prev')
      config.CSprev.attr('buttontype', 'previous')
      var selected=(config.persiststate)? featuredcontentglider.getCookie(config.gliderid) : config.selected
      config.selected=(isNaN(parseInt(selected))) ? config.selected : selected //test for cookie value containing null (1st page load) or "undefined" string  
      config.leftortop=(/up/i.test(config.direction))? "top" : "left" //set which CSS property to manipulate based on "direction"
      config.heightorwidth=(/up/i.test(config.direction))? config.CSglider.height() : config.CSglider.width() //Get glider height or width based on "direction"
      config.startpoint=(/^(left|up)/i.test(config.direction))? -config.heightorwidth : config.heightorwidth //set initial position of contents based on "direction"
      if (typeof config.remotecontent!="undefined" && config.remotecontent.length>0)
        featuredcontentglider.getremotecontent($, config)
      else
        featuredcontentglider.setuptoggler($, config)
      $(window).bind('unload', function(){ //clean up and persist
        config.CStogglerdiv.unbind('click')
        config.CStoc.unbind('click')
        config.CSnext.unbind('click')
        config.CSprev.unbind('click')
        if (config.persiststate)
          featuredcontentglider.setCookie(config.gliderid, config.CStogglerdiv.attr('lastselected'))
        config=null
        
      })
    })
  }
}