Bitcoin Forum

// ==UserScript==
// @name        bitcointalk adblock
// @namespace   grue
// @include     https://bitcointalk.org/index.php?topic=*
// @require     http://ajax.aspnetcdn.com/ajax/jQuery/jquery-2.1.3.min.js
// @grant       none
// @version     0.2.0
// @downloadURL https://bitcointalk.blob.core.windows.net/scripts/bct_adblock.user.js
// @updateURL   https://bitcointalk.blob.core.windows.net/scripts/bct_adblock.meta.js
// ==/UserScript==
function e(e) {
    for (var t = e.charCodeAt(), r = [
            [9472, 9583],
            [9600, 9631],
            [9632, 9727]
        ], n = 0; n < r.length; n++)
        if (t > r[n][0] && t <= r[n][1]) return !0;
    return !1
}

function t(r) {
    var n = Array.prototype.slice.call(r.childNodes),
        o = n.reduce(function(r, n) {
            if ($(n).attr("skip")) return r;
            if (1 == n.nodeType) return r + t(n);
            if (3 == n.nodeType) {
                var o = 0;
                for (c of n.nodeValue) e(c) && o++;
                var i = Number(getComputedStyle(n.parentNode).fontSize.match(/(\d*(\.\d*)?)px/)[1]);
                return r + i * i * o
            }
            return r
        }, 0);
    return o
}

function r(e) {
    var t = 0;
    return e.backgroundcolor ? 1 : (e.fontsize >= 14 && (t += .05 + Math.max(0, .02 * (e.fontsize - 14))), e.color && (t += .2), e.font && (t += .03), e.underline && (t += .05), e.bold && (t += .05), e.table && (t += .2), Math.min(t, 1))
}

function n(e, t) {
    var o = t;
    "undefined" == typeof t ? o = t = {} : t = $.extend({}, t);
    var i = Array.prototype.slice.call(e.childNodes);
    e.style["font-size"] && "inherit" != e.style["font-size"] && (t.fontsize = Number(e.style["font-size"].match(/(\d+)pt/)[1])), e.style.color && "inherit" != e.style.color && (t.color = !0), e.style["background-color"] && "inherit" != e.style["background-color"] && (t.backgroundcolor = !0), e.style["font-family"] && "inherit" != e.style["font-family"] && (t.font = !0), -1 != e.style["text-decoration"].indexOf("underline") && (t.underline = !0), "B" == e.tagName && (t.bold = !0), "TABLE" == e.tagName && (t.table = !0);
    var a = $(e).width() * $(e).height() * r(t) - $(e).width() * $(e).height() * r(o);
    return a += i.reduce(function(e, r) {
        return 1 == r.nodeType ? e + n(r, t) : e
    }, 0)
}

function o(e) {
    var r = 0;
    return r += t(e), r += n(e), r = Math.sqrt(r), $(e).find("a").length && (r *= 2), r > 100
}
for (var i = $("div .signature"), a = 0; a < i.length; a++) o(i[a]) && $(i[a]).attr("style", "opacity: 0; pointer-events: none");

e.style['text-decoration'] is undefined

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

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

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

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);
}

TypeError: element.style.fontSize.match(...) is null
Stack trace:
calculateFormattingScore@file:///.../bct_adblock2.user.js:76:5
calculateFormattingScore/score<@file:///.../bct_adblock2.user.js:104:9
calculateFormattingScore@file:///.../bct_adblock2.user.js:106:1
isAd@file:///.../bct_adblock2.user.js:113:3
@file:///.../bct_adblock2.user.js:125:1