/*

jBanner - a jQuery Banner Plugin
Copyright (c) 2009 Morgan Showman
Dual licensed under the MIT and GPL licenses:
http://www.opensource.org/licenses/mit-license.php
http://www.gnu.org/licenses/gpl.html
*/

(function($) {

  //define jBanner object with some default config settings
  $.jBanner = {
    defaults: {
      bannerContainer: "",
      height: 295, // height of images
      width: 685, // width of images
      borderSize: '0', // size of border around images
      borderStyle: 'none', // style of border around images
      borderColor: 'F00', // color of border around images
      padding: 0, // amount of padding (in pixels) around images
      margin: 0, // amount of margin (in pixels) around images
      caption: false, // display caption? true or false
      cheight: 0, // caption height
      delay: 5000, // delay to next element
      speed: 1000 // transition speed
    }
  };

  //extend jquery with the plugin
  $.fn.extend({
    jBanner:function(options) {

      //use defaults or properties supplied by user
      var config = $.extend({}, $.jBanner.defaults, options);

      if (!config.caption){config.cheight=0;}

      config.bannerContainer = "#"+this.attr("id");

      banner(config);

      //return the jquery object for chaining
      return this;
    }
  });
  function banner(config) {
    $(config.bannerContainer).css({'position':'relative','height':config.height+config.cheight+config.padding*2+config.margin*2+parseInt(config.borderSize)*2+'px','width':config.width+parseInt(config.borderSize)*2+'px','overflow':'hidden'});
    $(config.bannerContainer+" li").each(function(i){$(this).css({'position':'absolute','top':'0','left':i*(config.width+config.padding*2+config.margin*2+parseInt(config.borderSize)*2)+'px'});$(this).attr("title",i+1);$(this).children("a").after("<p>"+$(this).children("a").children("img").attr("alt")+"</p>");});
    $(config.bannerContainer+" li:first").addClass("selected");
    $(config.bannerContainer+" li img").css({'border':config.borderSize+'px '+config.borderStyle+' #'+config.borderColor,'height':config.height,'width':config.width});
    setTimeout( function(){next(config)}, config.delay);
  };
  function next(config) {
    var i = parseInt($(config.bannerContainer+" li.selected").attr("title"));
    if (LastElement(config,i)){$(config.bannerContainer+" li[title='"+NextElement(config,i)+"']").css('left',(config.width+config.padding*2+config.margin*2+parseInt(config.borderSize)*2)+'px');}
    $(config.bannerContainer+" li[title='"+i+"']").removeClass("selected");
    $(config.bannerContainer+" li[title='"+(NextElement(config,i))+"']").addClass("selected");
    $(config.bannerContainer+" li").each(function(i){var newLeft = parseInt( $(this).css("left").replace(/px/i, '') )-(config.width+config.padding*2+config.margin*2+parseInt(config.borderSize)*2);$(this).animate({'left':newLeft+'px'},config.speed+250);});
    setTimeout( function(){next(config)}, config.delay);
  };
  function NextElement(config,index) {
    if(index < parseInt($(config.bannerContainer+" li:last").attr("title"))) {return index + 1;} else {return 1;}
  };
  function LastElement(config,index) {
    return (parseInt($(config.bannerContainer+" li[title='"+NextElement(config,index)+"']").css("left").replace(/px/i, '')) == (1 - parseInt($(config.bannerContainer+" li:last").attr("title")))*(config.width+config.padding*2+config.margin*2+parseInt(config.borderSize)*2));
  };
})(jQuery);