/**
 * --------------------------------------------------------------------
 * jQuery-Plugin SuperBGimage - Scaling Fullscreen Backgrounds and Slideshow using jQuery
 * Version: 1.0, 29.08.2009
 *
 * by Andreas Eberhard, andreas.eberhard@gmail.com
 *                      http://dev.andreaseberhard.de/projects/superbgimage/
 *
 * Copyright (c) 2009 Andreas Eberhard
 * licensed under a Creative Commons Attribution 3.0
 *
 *  Inspired by 
 *	  Supersized - Fullscreen Slideshow jQuery Plugin
 *    http://buildinternet.com/project/supersized/
 *	  By Sam Dunn (www.buildinternet.com // www.onemightyroar.com)
 * --------------------------------------------------------------------
 * License:
 * http://creativecommons.org/licenses/by/3.0/
 * http://creativecommons.org/licenses/by/3.0/deed.de
 *
 * You are free:
 *       * to Share - to copy, distribute and transmit the work
 *       * to Remix - to adapt the work
 *
 * Under the following conditions:
 *       * Attribution. You must attribute the work in the manner specified
 *         by the author or licensor (but not in any way that suggests that
 *         they endorse you or your use of the work).
 * --------------------------------------------------------------------
 * Changelog:
 *    29.08.2009 initial Version 1.0
 * --------------------------------------------------------------------
 */
(function($){
  jQuery.fn.superbgimage=function(loadingoptions){
    var options=$.extend($.fn.superbgimage.defaults,$.fn.superbgimage.options,loadingoptions);
    $.superbg_inAnimation=false;
    $.superbg_slideshowActive=false;
    $.superbg_imgIndex=1;
    $.superbg_imgActual=1;
    $.superbg_imgLast=-1;
    $.superbg_imgSlide=0;
    $.superbg_interval=0;
    $.superbg_preload=0;
    $.superbg_direction=0;
    $.superbg_max_randomtrans=7;
    $.superbg_lasttrans=-1;
    $.superbg_isIE6=false;
    $.superbg_firstLoaded=false;
    $.superbg_saveId=$(this).attr('id');
    /*if($('#'+options.id).length===0){
      $('body').prepend('<div id="'+options.id+'" style="display:none;"></div>');
    }else{
      $('body').prepend($('#'+options.id));
    }*/
    $('#'+options.id).css('display','none').css('overflow','hidden').css('z-index',options.z_index);
    if(options.inlineMode===0){
      $('#'+options.id).css('position','fixed').css('width','100%').css('height','100%').css('top',0).css('left',0);
    }
    if(options.reload){
      $('#'+options.id+' img').remove();
    }
    $('#'+options.id+' img').hide().css('position','absolute');
    $('#'+options.id).children('img').each(function(){
      $(this).attr('rel',$.superbg_imgIndex++);
      if(!options.showtitle){
        $(this).attr('title','');
      }
    });
  $(this).children('a').each(function(){
    $(this).attr('rel',$.superbg_imgIndex++).click(function(){
      $(this).superbgShowImage();
      return false;
    }).addClass('preload');
  });
  $.superbg_imgIndex--;
  $(window).bind('load',function(){
    $(this).superbgLoad();
  });
  $(window).bind('resize',function(){
    $(this).superbgResize();
  });
  $.superbg_isIE6=/msie|MSIE 6/.test(navigator.userAgent);
  if($.superbg_isIE6&&(options.inlineMode===0)){
    $('#'+options.id).css('position','absolute').width($(window).width()).height($(window).height());
    $(window).bind('scroll',function(){
      $(this).superbgScrollIE6();
    });
  }
  if(options.reload){
    $(this).superbgLoad();
  }
  return this;
};

jQuery.fn.superbgScrollIE6=function(){
  var options=$.extend($.fn.superbgimage.defaults,$.fn.superbgimage.options);
  $('#'+options.id).css('top',document.documentElement.scrollTop+'px');
};

jQuery.fn.superbgLoad=function(){
  var options=$.extend($.fn.superbgimage.defaults,$.fn.superbgimage.options);
  if(($('#'+options.id).children('img').length>0)||($('#'+$.superbg_saveId).children('a').length>0)){
    $('#'+options.id).show();
  }
  if((typeof options.showimage!='undefined')&&(options.showimage>=0)){
    $.superbg_imgActual=options.showimage;
  }
  if(options.randomimage===1){
    $.superbg_imgActual=(1+parseInt(Math.random()*($.superbg_imgIndex-1+1),10));
  }
  $(this).superbgShowImage($.superbg_imgActual);
};

jQuery.fn.superbgimagePreload=function(){
  var options=$.extend($.fn.superbgimage.defaults,$.fn.superbgimage.options);
  clearInterval($.superbg_preload);
  if(!$.superbg_firstLoaded&&($('#'+$.superbg_saveId).children('a').length>0)){
    $.superbg_preload=setInterval("$(this).superbgimagePreload()",111);
    return;
  }
  $('#'+$.superbg_saveId).children('a.preload:first').each(function(){
    var imgrel=$(this).attr('rel');
    var imgtitle=$(this).attr('title');
    var img=new Image();
    $(img).load(function(){
      $(this).css('position','absolute').hide();
      if($('#'+options.id).children('img'+"[rel='"+imgrel+"']").length===0){
        $(this).attr('rel',imgrel);
        if(options.showtitle===1){
          $(this).attr('title',imgtitle);
        }
        $('#'+options.id).prepend(this);
      }
      img.onload=function(){};

    }).error(function(){
    img.onerror=function(){};

  }).attr('src',$(this).attr('href'));
  $.superbg_preload=setInterval("$(this).superbgimagePreload()",111);
}).removeClass('preload');
};

jQuery.fn.startSlideShow=function(){
  var options=$.extend($.fn.superbgimage.defaults,$.fn.superbgimage.options);
  $.superbg_imgSlide=$.superbg_imgActual;
  if($.superbg_interval!==0){
    clearInterval($.superbg_interval);
  }
  $.superbg_interval=setInterval("$(this).nextSlide()",options.slide_interval);
  $.superbg_slideshowActive=true;
  return false;
};

jQuery.fn.stopSlideShow=function(){
  var options=$.extend($.fn.superbgimage.defaults,$.fn.superbgimage.options);
  clearInterval($.superbg_interval);
  $.superbg_slideshowActive=false;
  return false;
};

jQuery.fn.nextSlide=function(){
  var options=$.extend($.fn.superbgimage.defaults,$.fn.superbgimage.options);
  if($.superbg_inAnimation)return false;
  if($.superbg_slideshowActive){
    clearInterval($.superbg_preload);
  }
  $.superbg_direction=0;
  $.superbg_imgSlide++;
  if($.superbg_imgSlide>$.superbg_imgIndex){
    $.superbg_imgSlide=1;
  }
  if(options.randomimage===1){
    $.superbg_imgSlide=(1+parseInt(Math.random()*($.superbg_imgIndex-1+1),10));
    while($.superbg_imgSlide===$.superbg_imgLast){
      $.superbg_imgSlide=(1+parseInt(Math.random()*($.superbg_imgIndex-1+1),10));
    }
  }
  $.superbg_imgActual=$.superbg_imgSlide;
return $(this).superbgShowImage($.superbg_imgActual);
};

jQuery.fn.prevSlide=function(){
  var options=$.extend($.fn.superbgimage.defaults,$.fn.superbgimage.options);
  if($.superbg_inAnimation)return false;
  $.superbg_direction=1;
  $.superbg_imgSlide--;
  if($.superbg_imgSlide<1){
    $.superbg_imgSlide=$.superbg_imgIndex;
  }
  if(options.randomimage===1){
    $.superbg_imgSlide=(1+parseInt(Math.random()*($.superbg_imgIndex-1+1),10));
    while($.superbg_imgSlide===$.superbg_imgLast){
      $.superbg_imgSlide=(1+parseInt(Math.random()*($.superbg_imgIndex-1+1),10));
    }
  }
  $.superbg_imgActual=$.superbg_imgSlide;
return $(this).superbgShowImage($.superbg_imgActual);
};

jQuery.fn.superbgResize=function(){
  var options=$.extend($.fn.superbgimage.defaults,$.fn.superbgimage.options);
  var thisimg=$('#'+options.id+' img.activeslide');
  var dimensions=$(this).superbgCalcSize($(thisimg).width(),$(thisimg).height());
  var newwidth=dimensions[0];
  var newheight=dimensions[1];
  var newleft=dimensions[2];
  var newtop=dimensions[3];
  $(thisimg).css('width',newwidth+'px');
  $(thisimg).css('height',newheight+'px');
  if($.superbg_isIE6&&(options.inlineMode===0)){
    $('#'+options.id).width(newwidth).height(newheight);
    $(thisimg).width(newwidth);
    $(thisimg).height(newheight);
  }
  $(thisimg).css('left',newleft+'px');
  if(options.vertical_center===1){
    $(thisimg).css('top',newtop+'px');
  }else{
    $(thisimg).css('top','0px');
  }
};

jQuery.fn.superbgCalcSize=function(imgw,imgh){
  var options=$.extend($.fn.superbgimage.defaults,$.fn.superbgimage.options);
  var browserwidth=$(window).width();
  var browserheight=$(window).height();
  if(options.inlineMode===1){
    browserwidth=$('#'+options.id).width();
    browserheight=$('#'+options.id).height();
  }
  var ratio=imgh/imgw;
  var newheight=0;
  var newwidth=0;
  if((browserheight/browserwidth)>ratio){
    newheight=browserheight;
    newwidth=Math.round(browserheight/ratio);
  }else{
    newheight=Math.round(browserwidth*ratio);
    newwidth=browserwidth;
  }
  var newleft=Math.round((browserwidth-newwidth)/2);
  var newtop=Math.round((browserheight-newheight)/2);
  var rcarr=[newwidth,newheight,newleft,newtop];
  return rcarr;
};

jQuery.fn.superbgShowImage=function(img){
  var options=$.extend($.fn.superbgimage.defaults,$.fn.superbgimage.options);
  $.superbg_imgActual=$(this).attr('rel');
  if(typeof img!=='undefined'){
    $.superbg_imgActual=img;
  }
  if($('#'+options.id+' img.activeslide').attr('rel')===$.superbg_imgActual){
    return false;
  }
  if($.superbg_inAnimation){
    return false;
  }else{
    $.superbg_inAnimation=true;
  }
  var imgsrc='';
  var imgtitle='';
  if($('#'+options.id).children('img'+"[rel='"+$.superbg_imgActual+"']").length===0){
    imgsrc=$('#'+$.superbg_saveId+' a'+"[rel='"+$.superbg_imgActual+"']").attr('href');
    imgtitle=$('#'+$.superbg_saveId+' a'+"[rel='"+$.superbg_imgActual+"']").attr('title');
  }else{
    imgsrc=$('#'+options.id).children('img'+"[rel='"+$.superbg_imgActual+"']").attr('src');
  }
  if((typeof options.onHide==='function')&&(options.onHide!==null)&&($.superbg_imgLast>=0)){
    options.onHide($.superbg_imgLast);
  }
  $('#'+options.id+' img.activeslide').superbgLoadImage(imgsrc,imgtitle);
  $('#'+$.superbg_saveId+' a').removeClass('activeslide');
  $('#'+$.superbg_saveId).children('a'+"[rel='"+$.superbg_imgActual+"']").addClass('activeslide');
  $.superbg_imgSlide=$.superbg_imgActual;
  $.superbg_imgLast=$.superbg_imgActual;
  return false;
};

jQuery.fn.superbgLoadImage=function(imgsrc,imgtitle){
  var options=$.extend($.fn.superbgimage.defaults,$.fn.superbgimage.options);
  if($('#'+options.id).children('img'+"[rel='"+$.superbg_imgActual+"']").length===0){
    var img=new Image();
    $(img).load(function(){
      $(this).css('position','absolute').hide();
      if($('#'+options.id).children('img'+"[rel='"+$.superbg_imgActual+"']").length===0){
        $(this).attr('rel',$.superbg_imgActual);
        if(options.showtitle===1){
          $(this).attr('title',imgtitle);
        }
        $('#'+options.id).prepend(this);
      }
      var thisimg=$('#'+options.id).children('img'+"[rel='"+$.superbg_imgActual+"']");
      var dimensions=$(this).superbgCalcSize(img.width,img.height);
      $(this).superbgTransition(thisimg,dimensions);
      if(!$.superbg_firstLoaded){
        if(options.slideshow===1){
          $(this).startSlideShow();
        }
        if((options.preload===1)&&($('#'+$.superbg_saveId).children('a').length>0)){
          $.superbg_preload=setInterval("$(this).superbgimagePreload()",250);
        }
      }
      $.superbg_firstLoaded=true;
    img.onload=function(){};

  }).error(function(){
  $.superbg_inAnimation=false;
  img.onerror=function(){};

}).attr('src',imgsrc);
}else{
  var thisimg=$('#'+options.id).children('img'+"[rel='"+$.superbg_imgActual+"']");
  var dimensions=$(this).superbgCalcSize($(thisimg).width(),$(thisimg).height());
  $(this).superbgTransition(thisimg,dimensions);
  if(!$.superbg_firstLoaded){
    if(options.slideshow===1){
      $(this).startSlideShow();
    }
    if((options.preload===1)&&($('#'+$.superbg_saveId).children('a').length>0)){
      $.superbg_preload=setInterval("$(this).superbgimagePreload()",250);
    }
    $.superbg_firstLoaded=true;
  }
}
};

jQuery.fn.superbgTransition=function(thisimg,dimensions){
  var options=$.extend($.fn.superbgimage.defaults,$.fn.superbgimage.options);
  var newwidth=dimensions[0];
  var newheight=dimensions[1];
  var newleft=dimensions[2];
  var newtop=dimensions[3];
  $(thisimg).css('width',newwidth+'px').css('height',newheight+'px').css('left',newleft+'px');
  if((typeof options.onClick==='function')&&(options.onClick!==null)){
    $(thisimg).unbind('click').click(function(){
      options.onClick($.superbg_imgActual);
    });
  }
  if((typeof options.onMouseenter==='function')&&(options.onMouseenter!==null)){
    $(thisimg).unbind('mouseenter').mouseenter(function(){
      options.onMouseenter($.superbg_imgActual);
    });
  }
  if((typeof options.onMouseleave==='function')&&(options.onMouseleave!==null)){
    $(thisimg).unbind('mouseleave').mouseleave(function(){
      options.onMouseleave($.superbg_imgActual);
    });
  }
  if((typeof options.onMousemove==='function')&&(options.onMousemove!==null)){
    $(thisimg).unbind('mousemove').mousemove(function(e){
      options.onMousemove($.superbg_imgActual,e);
    });
  }
  if(options.randomtransition===1){
    var randomtrans=(0+parseInt(Math.random()*($.superbg_max_randomtrans-0+1),10));
    while(randomtrans===$.superbg_lasttrans){
      randomtrans=(0+parseInt(Math.random()*($.superbg_max_randomtrans-0+1),10));
    }
    options.transition=randomtrans;
  }
  if(options.vertical_center===1){
    $(thisimg).css('top',newtop+'px');
  }else{
    $(thisimg).css('top','0px');
  }
  var akt_transitionout=options.transitionout;
  if((options.transition===6)||(options.transition===7)){
    akt_transitionout=0;
  }
  if(akt_transitionout===1){
    $('#'+options.id+' img.activeslide').removeClass('activeslide').addClass('lastslide').css('z-index',0);
  }else{
    $('#'+options.id+' img.activeslide').removeClass('activeslide').addClass('lastslideno').css('z-index',0);
  }
  $(thisimg).css('z-index',1);
  options.transition=parseInt(options.transition,10);
  $.superbg_lasttrans=options.transition;
  var theEffect='';
  var theDir='';
  if(options.transition===0){
    $(thisimg).show(1,function(){
      if((typeof options.onShow==='function')&&(options.onShow!==null))options.onShow($.superbg_imgActual);
      $.superbg_inAnimation=false;
      if($.superbg_slideshowActive){
        $('#'+options.id).startSlideShow();
      }
    }).addClass('activeslide');
}else if(options.transition===1){
  $(thisimg).fadeIn(options.speed,function(){
    if((typeof options.onShow==='function')&&(options.onShow!==null))options.onShow($.superbg_imgActual);
    $('#'+options.id+' img.lastslideno').hide(1,null).removeClass('lastslideno');
    $.superbg_inAnimation=false;
    if($.superbg_slideshowActive){
      $('#'+options.id).startSlideShow();
    }
  }).addClass('activeslide');
}else{
  if(options.transition===2){
    theEffect='slide';
    theDir='up';
  }
  if(options.transition===3){
    theEffect='slide';
    theDir='right';
  }
  if(options.transition===4){
    theEffect='slide';
    theDir='down';
  }
  if(options.transition===5){
    theEffect='slide';
    theDir='left';
  }
  if(options.transition===6){
    theEffect='blind';
    theDir='horizontal';
  }
  if(options.transition===7){
    theEffect='blind';
    theDir='vertical';
  }
  if(options.transition===90){
    theEffect='slide';
    theDir='left';
    if($.superbg_direction===1){
      theDir='right';
    }
  }
  if(options.transition===91){
  theEffect='slide';
  theDir='down';
  if($.superbg_direction===1){
    theDir='up';
  }
}
$(thisimg).show(theEffect,{
  direction:theDir
},options.speed,function(){
  if((typeof options.onShow==='function')&&(options.onShow!==null))options.onShow($.superbg_imgActual);
  $('#'+options.id+' img.lastslideno').hide(1,null).removeClass('lastslideno');
  $.superbg_inAnimation=false;
  if($.superbg_slideshowActive){
    $('#'+options.id).startSlideShow();
  }
}).addClass('activeslide');
}
if(akt_transitionout===1){
  var outspeed=options.speed;
  if(options.speed=='slow'){
    outspeed=600+200;
  }else if(options.speed=='normal'){
    outspeed=400+200;
  }else if(options.speed=='fast'){
    outspeed=400+200;
  }else{
    outspeed=options.speed+200;
  }
  if(options.transition===0){
    $('#'+options.id+' img.lastslide').hide(1,null).removeClass('lastslide');
  }else if(options.transition==1){
    $('#'+options.id+' img.lastslide').fadeOut(outspeed).removeClass('lastslide');
  }else{
    if(options.transition===2){
      theEffect='slide';
      theDir='down';
    }
    if(options.transition===3){
      theEffect='slide';
      theDir='left';
    }
    if(options.transition===4){
      theEffect='slide';
      theDir='up';
    }
    if(options.transition===5){
      theEffect='slide';
      theDir='right';
    }
    if(options.transition===6){
      theEffect='';
      theDir='';
    }
    if(options.transition===7){
      theEffect='';
      theDir='';
    }
    if(options.transition===90){
      theEffect='slide';
      theDir='right';
      if($.superbg_direction===1){
        theDir='left';
      }
    }
    if(options.transition===91){
    theEffect='slide';
    theDir='up';
    if($.superbg_direction===1){
      theDir='down';
    }
  }
  $('#'+options.id+' img.lastslide').hide(theEffect,{
  direction:theDir
},outspeed).removeClass('lastslide');
}
}else{
  $('#'+options.id+' img.lastslide').hide(1,null).removeClass('lastslide');
}
};

jQuery.fn.superbgimage.defaults={
  id:'superbgimage',
  z_index:0,
  inlineMode:0,
  showimage:1,
  vertical_center:1,
  transition:1,
  transitionout:1,
  randomtransition:0,
  showtitle:0,
  slideshow:0,
  slide_interval:5000,
  randomimage:0,
  speed:'slow',
  preload:1,
  onShow:null,
  onClick:null,
  onHide:null,
  onMouseenter:null,
  onMouseleave:null,
  onMousemove:null
};

})(jQuery);