(function($) { $(document).ready(function(){

// putting lines by the pre blocks
$("pre").each(function(){
  var pre = $(this).text().split("\n");
  var lines = new Array(pre.length+1);
  for(var i = 0; i < pre.length; i++) {
    var wrap = Math.floor(pre[i].split("").length / 70)
    if (pre[i]==""&&i==pre.length-1) {
      lines.splice(i, 1);
    } else {
      lines[i] = i+1;
      for(var j = 0; j < wrap; j++) {
        lines[i] += "\n";
      }
    }
  }
  $(this).before("<pre class='lines'>" + lines.join("\n") + "</pre>");
});

var headings = [];

var collectHeaders = function(){
  headings.push({"top":$(this).offset().top - 15,"text":$(this).text()});
}

if($(".markdown-body h1").length > 1) $(".markdown-body h1").each(collectHeaders)
else if($(".markdown-body h2").length > 1) $(".markdown-body h2").each(collectHeaders)
else if($(".markdown-body h3").length > 1) $(".markdown-body h3").each(collectHeaders)

$(window).scroll(function(){
  if(headings.length==0) return true;
  var scrolltop = $(window).scrollTop() || 0;
  if(headings[0] && scrolltop < headings[0].top) {
    $(".current-section").css({"opacity":0,"visibility":"hidden"});
    return false;
  }
  $(".current-section").css({"opacity":1,"visibility":"visible"});
  for(var i in headings) {
    if(scrolltop >= headings[i].top) {
      $(".current-section .name").text(headings[i].text);
    }
  }
});

$(".current-section a").click(function(){
  $(window).scrollTop(0);
  return false;
})

}); })(jQuery)