Topic: Signature Adblock Script [0.5.0] - page 5. (Read 37467 times)

function isAnnoyingCharacter(char)
{
  var code = char.charCodeAt();
  var ranges = [[0x2500, 0x256F],
                [0x2580, 0x259F],
                [0x25A0, 0x25FF],
               ];
  for(var i = 0; i < ranges.length; i++)
    if(code > ranges[i][0] && code <= ranges[i][1])
      return true;
  return false;
}

function calculateAnnoyingCharacter(element)
{
  var childNodes = Array.prototype.slice.call(element.childNodes);
  var result = childNodes.reduce(
    function(prev, current, index)
    {
      if(current.nodeType == 1)
        return prev + calculateAnnoyingCharacter(current);
      if(current.nodeType == 3)
      {
        var count = 0;
        for (c of current.nodeValue)
          if(isAnnoyingCharacter(c))
            count++;

        var size = Number(getComputedStyle(current.parentNode).fontSize.match(/(\d*(\.\d*)?)px/)[1]);
        return prev + size*size*count;
      }
      return prev;
    }, 0);
  return result;
}

function getFormattingRate(context)
{
  var result = 0;
  if(context.backgroundColor)
    return 1;
  if(context.fontSize >= 14)
    result += 0.05 + Math.max(0, (context.fontsize - 14)*0.03);
  if(context.color)
    result += 0.2;
  if(context.font)
    result += 0.03;
  if(context.underline)
    result += 0.02;
  if(context.bold)
    result += 0.04;
  if(context.table)
    result += 0.2;
  return Math.min(result, 1);
}


function calculateFormattingScore(element, context)
{
  var previousContext = context;
  if(typeof(context) === 'undefined')
    previousContext = context = {};
  else
    context = $.extend({}, context);

  if(element.style.fontSize && element.style.fontSize != "inherit")
    context.fontsize = Number(element.style.fontSize.match(/(\d+)pt/)[1]);

  if(element.style.color && element.style.color != "inherit")
    context.color = true;
  
  if(element.style.backgroundColor && element.style.backgroundColor != "inherit")
    context.backgroundColor = true;
  
  if(element.style.fontFamily && element.style.fontFamily != "inherit")
    context.font = true;
  
  if(element.style.textDecoration.indexOf("underline") != -1)
    context.underline = true;
  
  if(element.tagName == "B")
    context.bold = true;
  
  if(element.tagName == "TABLE")
    context.table = true;
  
  var score = $(element).width() * $(element).height() * getFormattingRate(context) 
              - $(element).width() * $(element).height() * getFormattingRate(previousContext);

  var childNodes = Array.prototype.slice.call(element.childNodes);
  score += childNodes.reduce(
    function(prev, current, index)
    {
      if(current.nodeType == 1)
        return prev + calculateFormattingScore(current, context);
      return prev;
    }, 0);
  return score;
}

function isAd(div)
{
  var score = 0;
  score += calculateAnnoyingCharacter(div);
  score += calculateFormattingScore(div);
  score = Math.sqrt(score);
  if($(div).find("a").length)
    score *= 2;
  
  return score > 100;
};

try
{
  var signatures = $("div .signature");
  for(var i = 0; i < signatures.length; i++)
  {
    if(isAd(signatures[i]))
    {
        $(signatures[i]).attr("style", "opacity: 0; pointer-events: none");
    }
  }
}
catch(e)
{
  console.log(e);
}

$(e).find("a").length && (r *= 2)

if ($(element).find("a").length > 0) { score = score * 2 }

$(i[a]).attr("style", "opacity: 0; pointer-events: none")